Merge pull request #7 from randombit/master

Update to match current Botan
author: Mouse <[email protected]> 2015-10-27 15:24:39 -0400
committer: Mouse <[email protected]> 2015-10-27 15:24:39 -0400
commit: a4966294751e503f97cfc3826308e43415c662c7 (patch)
tree: 43f7b6f6f763a4b5627ce0e723465ce6fb3eca89 /src
parent: f6f0b152e6c46ad499eec2b8f3973a3a678f3008 (diff)
parent: a38d045acf208390b04c03f6473783e71be93168 (diff)
80 files changed, 3774 insertions, 483 deletions
diff --git a/src/lib/cert/x509/cert_status.h b/src/lib/cert/x509/cert_status.h
index 56777cae8..5028af384 100644
--- a/src/lib/cert/x509/cert_status.h
+++ b/src/lib/cert/x509/cert_status.h
@@ -31,6 +31,8 @@ enum class Certificate_Status_Code {
    CERT_ISSUER_NOT_FOUND = 3000,
    CANNOT_ESTABLISH_TRUST,
 
+   CERT_CHAIN_LOOP,
+
    // Validation errors
    POLICY_ERROR = 4000,
    INVALID_USAGE,
@@ -42,6 +44,8 @@ enum class Certificate_Status_Code {
    OCSP_CERT_NOT_LISTED,
    OCSP_BAD_STATUS,
 
+   CERT_NAME_NOMATCH,
+
    // Hard failures
    CERT_IS_REVOKED = 5000,
    CRL_BAD_SIGNATURE,
diff --git a/src/lib/cert/x509/info.txt b/src/lib/cert/x509/info.txt
index 291be3114..be1e879c3 100644
--- a/src/lib/cert/x509/info.txt
+++ b/src/lib/cert/x509/info.txt
@@ -1,4 +1,4 @@
-define X509_CERTIFICATES 20131128
+define X509_CERTIFICATES 20151023
 define OCSP 20131128
 
 <requires>
diff --git a/src/lib/cert/x509/key_constraint.h b/src/lib/cert/x509/key_constraint.h
index 3509b6868..179e413b5 100644
--- a/src/lib/cert/x509/key_constraint.h
+++ b/src/lib/cert/x509/key_constraint.h
@@ -18,15 +18,15 @@ namespace Botan {
 */
 enum Key_Constraints {
    NO_CONSTRAINTS     = 0,
-   DIGITAL_SIGNATURE  = 32768,
-   NON_REPUDIATION    = 16384,
-   KEY_ENCIPHERMENT   = 8192,
-   DATA_ENCIPHERMENT  = 4096,
-   KEY_AGREEMENT      = 2048,
-   KEY_CERT_SIGN      = 1024,
-   CRL_SIGN           = 512,
-   ENCIPHER_ONLY      = 256,
-   DECIPHER_ONLY      = 128
+   DIGITAL_SIGNATURE  = 1 << 15,
+   NON_REPUDIATION    = 1 << 14,
+   KEY_ENCIPHERMENT   = 1 << 13,
+   DATA_ENCIPHERMENT  = 1 << 12,
+   KEY_AGREEMENT      = 1 << 11,
+   KEY_CERT_SIGN      = 1 << 10,
+   CRL_SIGN           = 1 << 9,
+   ENCIPHER_ONLY      = 1 << 8,
+   DECIPHER_ONLY      = 1 << 7
 };
 
 class Public_Key;
diff --git a/src/lib/cert/x509/x509cert.cpp b/src/lib/cert/x509/x509cert.cpp
index 48e437352..3d1ebbbad 100644
--- a/src/lib/cert/x509/x509cert.cpp
+++ b/src/lib/cert/x509/x509cert.cpp
@@ -1,6 +1,6 @@
 /*
 * X.509 Certificates
-* (C) 1999-2010 Jack Lloyd
+* (C) 1999-2010,2015 Jack Lloyd
 *
 * Botan is released under the Simplified BSD License (see license.txt)
 */
@@ -224,7 +224,7 @@ bool X509_Certificate::is_CA_cert() const
    if(!subject.get1_u32bit("X509v3.BasicConstraints.is_ca"))
       return false;
 
-   return allowed_usage(KEY_CERT_SIGN);
+   return allowed_usage(Key_Constraints(KEY_CERT_SIGN));
    }
 
 bool X509_Certificate::allowed_usage(Key_Constraints usage) const
@@ -236,10 +236,37 @@ bool X509_Certificate::allowed_usage(Key_Constraints usage) const
 
 bool X509_Certificate::allowed_usage(const std::string& usage) const
    {
-   for(auto constraint : ex_constraints())
-      if(constraint == usage)
+   const std::vector<std::string> ex = ex_constraints();
+
+   if(ex.empty())
+      return true;
+
+   if(std::find(ex.begin(), ex.end(), usage) != ex.end())
+      return true;
+
+   return false;
+   }
+
+bool X509_Certificate::allowed_usage(Usage_Type usage) const
+   {
+   switch(usage)
+      {
+      case Usage_Type::UNSPECIFIED:
          return true;
 
+      case Usage_Type::TLS_SERVER_AUTH:
+         return allowed_usage(Key_Constraints(DATA_ENCIPHERMENT | KEY_ENCIPHERMENT | DIGITAL_SIGNATURE)) && allowed_usage("PKIX.ServerAuth");
+
+      case Usage_Type::TLS_CLIENT_AUTH:
+         return allowed_usage(Key_Constraints(DIGITAL_SIGNATURE | NON_REPUDIATION)) && allowed_usage("PKIX.ClientAuth");
+
+      case Usage_Type::OCSP_RESPONDER:
+         return allowed_usage(Key_Constraints(DIGITAL_SIGNATURE | NON_REPUDIATION)) && allowed_usage("PKIX.OCSPSigning");
+
+      case Usage_Type::CERTIFICATE_AUTHORITY:
+         return is_CA_cert();
+      }
+
    return false;
    }
 
@@ -310,9 +337,6 @@ std::vector<byte> X509_Certificate::serial_number() const
    return subject.get1_memvec("X509.Certificate.serial");
    }
 
-/*
-* Return the distinguished name of the issuer
-*/
 X509_DN X509_Certificate::issuer_dn() const
    {
    return create_dn(issuer);
@@ -323,9 +347,6 @@ std::vector<byte> X509_Certificate::raw_issuer_dn() const
    return issuer.get1_memvec("X509.Certificate.dn_bits");
    }
 
-/*
-* Return the distinguished name of the subject
-*/
 X509_DN X509_Certificate::subject_dn() const
    {
    return create_dn(subject);
@@ -336,36 +357,6 @@ std::vector<byte> X509_Certificate::raw_subject_dn() const
    return subject.get1_memvec("X509.Certificate.dn_bits");
    }
 
-namespace {
-
-bool cert_subject_dns_match(const std::string& name,
-                            const std::vector<std::string>& cert_names)
-   {
-   for(size_t i = 0; i != cert_names.size(); ++i)
-      {
-      const std::string cn = cert_names[i];
-
-      if(cn == name)
-         return true;
-
-      /*
-      * Possible wildcard match. We only support the most basic form of
-      * cert wildcarding ala RFC 2595
-      */
-      if(cn.size() > 2 && cn[0] == '*' && cn[1] == '.' && name.size() > cn.size())
-         {
-         const std::string base = cn.substr(1, std::string::npos);
-
-         if(name.compare(name.size() - base.size(), base.size(), base) == 0)
-            return true;
-         }
-      }
-
-   return false;
-   }
-
-}
-
 std::string X509_Certificate::fingerprint(const std::string& hash_name) const
    {
    std::unique_ptr<HashFunction> hash(HashFunction::create(hash_name));
@@ -391,11 +382,17 @@ bool X509_Certificate::matches_dns_name(const std::string& name) const
    if(name == "")
       return false;
 
-   if(cert_subject_dns_match(name, subject_info("DNS")))
-      return true;
+   std::vector<std::string> issued_names = subject_info("DNS");
 
-   if(cert_subject_dns_match(name, subject_info("Name")))
-      return true;
+   // Fall back to CN only if no DNS names are set (RFC 6125 sec 6.4.4)
+   if(issued_names.empty())
+      issued_names = subject_info("Name");
+
+   for(size_t i = 0; i != issued_names.size(); ++i)
+      {
+      if(host_wildcard_match(issued_names[i], name))
+         return true;
+      }
 
    return false;
    }
@@ -436,45 +433,36 @@ bool operator!=(const X509_Certificate& cert1, const X509_Certificate& cert2)
 
 std::string X509_Certificate::to_string() const
    {
-   const char* dn_fields[] = { "Name",
-                               "Email",
-                               "Organization",
-                               "Organizational Unit",
-                               "Locality",
-                               "State",
-                               "Country",
-                               "IP",
-                               "DNS",
-                               "URI",
-                               "PKIX.XMPPAddr",
-                               nullptr };
+   const std::vector<std::string> dn_fields{
+      "Name",
+      "Email",
+      "Organization",
+      "Organizational Unit",
+      "Locality",
+      "State",
+      "Country",
+      "IP",
+      "DNS",
+      "URI",
+      "PKIX.XMPPAddr"
+      };
 
    std::ostringstream out;
 
-   for(size_t i = 0; dn_fields[i]; ++i)
+   for(auto&& field : dn_fields)
       {
-      const std::vector<std::string> vals = this->subject_info(dn_fields[i]);
-
-      if(vals.empty())
-         continue;
-
-      out << "Subject " << dn_fields[i] << ":";
-      for(size_t j = 0; j != vals.size(); ++j)
-         out << " " << vals[j];
-      out << "\n";
+      for(auto&& val : subject_info(field))
+         {
+         out << "Subject " << field << ": " << val << "\n";
+         }
       }
 
-   for(size_t i = 0; dn_fields[i]; ++i)
+   for(auto&& field : dn_fields)
       {
-      const std::vector<std::string> vals = this->issuer_info(dn_fields[i]);
-
-      if(vals.empty())
-         continue;
-
-      out << "Issuer " << dn_fields[i] << ":";
-      for(size_t j = 0; j != vals.size(); ++j)
-         out << " " << vals[j];
-      out << "\n";
+      for(auto&& val : issuer_info(field))
+         {
+         out << "Issuer " << field << ": " << val << "\n";
+         }
       }
 
    out << "Version: " << this->x509_version() << "\n";
diff --git a/src/lib/cert/x509/x509cert.h b/src/lib/cert/x509/x509cert.h
index 9fd3e660a..578360a80 100644
--- a/src/lib/cert/x509/x509cert.h
+++ b/src/lib/cert/x509/x509cert.h
@@ -1,6 +1,6 @@
 /*
 * X.509 Certificates
-* (C) 1999-2007 Jack Lloyd
+* (C) 1999-2007,2015 Jack Lloyd
 *
 * Botan is released under the Simplified BSD License (see license.txt)
 */
@@ -18,6 +18,15 @@
 
 namespace Botan {
 
+enum class Usage_Type
+   {
+   UNSPECIFIED, // no restrictions
+   TLS_SERVER_AUTH,
+   TLS_CLIENT_AUTH,
+   CERTIFICATE_AUTHORITY,
+   OCSP_RESPONDER
+   };
+
 /**
 * This class represents X.509 Certificate
 */
@@ -37,13 +46,13 @@ class BOTAN_DLL X509_Certificate : public X509_Object
       std::vector<byte> subject_public_key_bits() const;
 
       /**
-      * Get the issuer certificate DN.
+      * Get the certificate's issuer distinguished name (DN).
       * @return issuer DN of this certificate
       */
       X509_DN issuer_dn() const;
 
       /**
-      * Get the subject certificate DN.
+      * Get the certificate's subject distinguished name (DN).
       * @return subject DN of this certificate
       */
       X509_DN subject_dn() const;
@@ -137,6 +146,8 @@ class BOTAN_DLL X509_Certificate : public X509_Object
       */
       bool allowed_usage(const std::string& usage) const;
 
+      bool allowed_usage(Usage_Type usage) const;
+
       /**
       * Get the path limit as defined in the BasicConstraints extension of
       * this certificate.
diff --git a/src/lib/cert/x509/x509path.cpp b/src/lib/cert/x509/x509path.cpp
index 09cabcb65..a6c3ce6e9 100644
--- a/src/lib/cert/x509/x509path.cpp
+++ b/src/lib/cert/x509/x509path.cpp
@@ -214,7 +214,9 @@ check_chain(const std::vector<X509_Certificate>& cert_path,
 Path_Validation_Result x509_path_validate(
    const std::vector<X509_Certificate>& end_certs,
    const Path_Validation_Restrictions& restrictions,
-   const std::vector<Certificate_Store*>& certstores)
+   const std::vector<Certificate_Store*>& certstores,
+   const std::string& hostname,
+   Usage_Type usage)
    {
    if(end_certs.empty())
       throw std::invalid_argument("x509_path_validate called with no subjects");
@@ -222,6 +224,13 @@ Path_Validation_Result x509_path_validate(
    std::vector<X509_Certificate> cert_path;
    cert_path.push_back(end_certs[0]);
 
+   /*
+   * This is an inelegant but functional way of preventing path loops
+   * (where C1 -> C2 -> C3 -> C1). We store a set of all the certificate
+   * fingerprints in the path. If there is a duplicate, we error out.
+   */
+   std::set<std::string> certs_seen;
+
    Certificate_Store_Overlay extra(end_certs);
 
    // iterate until we reach a root or cannot find the issuer
@@ -231,38 +240,55 @@ Path_Validation_Result x509_path_validate(
       if(!cert)
          return Path_Validation_Result(Certificate_Status_Code::CERT_ISSUER_NOT_FOUND);
 
+      const std::string fprint = cert->fingerprint("SHA-256");
+      if(certs_seen.count(fprint) > 0)
+         return Path_Validation_Result(Certificate_Status_Code::CERT_CHAIN_LOOP);
+      certs_seen.insert(fprint);
       cert_path.push_back(*cert);
       }
 
-   return Path_Validation_Result(check_chain(cert_path, restrictions, certstores),
-                                 std::move(cert_path));
+   std::vector<std::set<Certificate_Status_Code>> res = check_chain(cert_path, restrictions, certstores);
+
+   if(hostname != "" && !cert_path[0].matches_dns_name(hostname))
+      res[0].insert(Certificate_Status_Code::CERT_NAME_NOMATCH);
+
+   if(!cert_path[0].allowed_usage(usage))
+      res[0].insert(Certificate_Status_Code::INVALID_USAGE);
+
+   return Path_Validation_Result(res, std::move(cert_path));
    }
 
 Path_Validation_Result x509_path_validate(
    const X509_Certificate& end_cert,
    const Path_Validation_Restrictions& restrictions,
-   const std::vector<Certificate_Store*>& certstores)
+   const std::vector<Certificate_Store*>& certstores,
+   const std::string& hostname,
+   Usage_Type usage)
    {
    std::vector<X509_Certificate> certs;
    certs.push_back(end_cert);
-   return x509_path_validate(certs, restrictions, certstores);
+   return x509_path_validate(certs, restrictions, certstores, hostname, usage);
    }
 
 Path_Validation_Result x509_path_validate(
    const std::vector<X509_Certificate>& end_certs,
    const Path_Validation_Restrictions& restrictions,
-   const Certificate_Store& store)
+   const Certificate_Store& store,
+   const std::string& hostname,
+   Usage_Type usage)
    {
    std::vector<Certificate_Store*> certstores;
    certstores.push_back(const_cast<Certificate_Store*>(&store));
 
-   return x509_path_validate(end_certs, restrictions, certstores);
+   return x509_path_validate(end_certs, restrictions, certstores, hostname, usage);
    }
 
 Path_Validation_Result x509_path_validate(
    const X509_Certificate& end_cert,
    const Path_Validation_Restrictions& restrictions,
-   const Certificate_Store& store)
+   const Certificate_Store& store,
+   const std::string& hostname,
+   Usage_Type usage)
    {
    std::vector<X509_Certificate> certs;
    certs.push_back(end_cert);
@@ -270,7 +296,7 @@ Path_Validation_Result x509_path_validate(
    std::vector<Certificate_Store*> certstores;
    certstores.push_back(const_cast<Certificate_Store*>(&store));
 
-   return x509_path_validate(certs, restrictions, certstores);
+   return x509_path_validate(certs, restrictions, certstores, hostname, usage);
    }
 
 Path_Validation_Restrictions::Path_Validation_Restrictions(bool require_rev,
@@ -310,6 +336,9 @@ Path_Validation_Result::Path_Validation_Result(std::vector<std::set<Certificate_
 
 const X509_Certificate& Path_Validation_Result::trust_root() const
    {
+   if(m_cert_path.empty())
+      throw std::runtime_error("Path_Validation_Result::trust_root no path set");
+
    return m_cert_path[m_cert_path.size()-1];
    }
 
@@ -366,6 +395,8 @@ const char* Path_Validation_Result::status_string(Certificate_Status_Code code)
          return "Certificate issuer not found";
       case Certificate_Status_Code::CANNOT_ESTABLISH_TRUST:
          return "Cannot establish trust";
+      case Certificate_Status_Code::CERT_CHAIN_LOOP:
+         return "Loop in certificate chain";
 
       case Certificate_Status_Code::POLICY_ERROR:
          return "Policy error";
@@ -381,6 +412,8 @@ const char* Path_Validation_Result::status_string(Certificate_Status_Code code)
          return "OCSP cert not listed";
       case Certificate_Status_Code::OCSP_BAD_STATUS:
          return "OCSP bad status";
+      case Certificate_Status_Code::CERT_NAME_NOMATCH:
+         return "Certificate does not match provided name";
 
       case Certificate_Status_Code::CERT_IS_REVOKED:
          return "Certificate is revoked";
@@ -388,9 +421,10 @@ const char* Path_Validation_Result::status_string(Certificate_Status_Code code)
          return "CRL bad signature";
       case Certificate_Status_Code::SIGNATURE_ERROR:
          return "Signature error";
-      default:
-         return "Unknown error";
+         // intentionally no default so we are warned
       }
+
+   return "Unknown error";
    }
 
 }
diff --git a/src/lib/cert/x509/x509path.h b/src/lib/cert/x509/x509path.h
index f400641be..c56aef21f 100644
--- a/src/lib/cert/x509/x509path.h
+++ b/src/lib/cert/x509/x509path.h
@@ -132,13 +132,16 @@ class BOTAN_DLL Path_Validation_Result
       std::vector<X509_Certificate> m_cert_path;
    };
 
+
 /**
 * PKIX Path Validation
 */
 Path_Validation_Result BOTAN_DLL x509_path_validate(
    const std::vector<X509_Certificate>& end_certs,
    const Path_Validation_Restrictions& restrictions,
-   const std::vector<Certificate_Store*>& certstores);
+   const std::vector<Certificate_Store*>& certstores,
+   const std::string& hostname = "",
+   Usage_Type usage = Usage_Type::UNSPECIFIED);
 
 /**
 * PKIX Path Validation
@@ -146,7 +149,9 @@ Path_Validation_Result BOTAN_DLL x509_path_validate(
 Path_Validation_Result BOTAN_DLL x509_path_validate(
    const X509_Certificate& end_cert,
    const Path_Validation_Restrictions& restrictions,
-   const std::vector<Certificate_Store*>& certstores);
+   const std::vector<Certificate_Store*>& certstores,
+   const std::string& hostname = "",
+   Usage_Type usage = Usage_Type::UNSPECIFIED);
 
 /**
 * PKIX Path Validation
@@ -154,7 +159,9 @@ Path_Validation_Result BOTAN_DLL x509_path_validate(
 Path_Validation_Result BOTAN_DLL x509_path_validate(
    const X509_Certificate& end_cert,
    const Path_Validation_Restrictions& restrictions,
-   const Certificate_Store& store);
+   const Certificate_Store& store,
+   const std::string& hostname = "",
+   Usage_Type usage = Usage_Type::UNSPECIFIED);
 
 /**
 * PKIX Path Validation
@@ -162,7 +169,9 @@ Path_Validation_Result BOTAN_DLL x509_path_validate(
 Path_Validation_Result BOTAN_DLL x509_path_validate(
    const std::vector<X509_Certificate>& end_certs,
    const Path_Validation_Restrictions& restrictions,
-   const Certificate_Store& store);
+   const Certificate_Store& store,
+   const std::string& hostname = "",
+   Usage_Type usage = Usage_Type::UNSPECIFIED);
 
 }
 
diff --git a/src/lib/pk_pad/eme_pkcs1/eme_pkcs.cpp b/src/lib/pk_pad/eme_pkcs1/eme_pkcs.cpp
index 6b3bce0aa..5ff288db2 100644
--- a/src/lib/pk_pad/eme_pkcs1/eme_pkcs.cpp
+++ b/src/lib/pk_pad/eme_pkcs1/eme_pkcs.cpp
@@ -28,8 +28,7 @@ secure_vector<byte> EME_PKCS1v15::pad(const byte in[], size_t inlen,
 
    out[0] = 0x02;
    for(size_t j = 1; j != olen - inlen - 1; ++j)
-      while(out[j] == 0)
-         out[j] = rng.next_byte();
+      out[j] = rng.next_nonzero_byte();
    buffer_insert(out, olen - inlen, in, inlen);
 
    return out;
diff --git a/src/lib/pubkey/mce/code_based_key_gen.cpp b/src/lib/pubkey/mce/code_based_key_gen.cpp
index 44b1cb4d6..8fb290386 100644
--- a/src/lib/pubkey/mce/code_based_key_gen.cpp
+++ b/src/lib/pubkey/mce/code_based_key_gen.cpp
@@ -4,12 +4,14 @@
  *
  * (C) 2014 cryptosource GmbH
  * (C) 2014 Falko Strenzke [email protected]
+ * (C) 2015 Jack Lloyd
  *
  * Botan is released under the Simplified BSD License (see license.txt)
  *
  */
 
 #include <botan/mceliece.h>
+#include <botan/internal/mce_internal.h>
 #include <botan/internal/code_based_util.h>
 #include <botan/loadstor.h>
 
@@ -133,21 +135,14 @@ secure_vector<int> binary_matrix::row_reduced_echelon_form()
    return perm;
    }
 
-void randomize_support(u32bit n, std::vector<gf2m> & L, RandomNumberGenerator & rng)
+void randomize_support(std::vector<gf2m>& L, RandomNumberGenerator& rng)
    {
-   unsigned int i, j;
-   gf2m tmp;
-
-   for (i = 0; i < n; ++i)
+   for(u32bit i = 0; i != L.size(); ++i)
       {
+      gf2m rnd = random_gf2m(rng);
 
-      gf2m rnd;
-      rng.randomize(reinterpret_cast<byte*>(&rnd), sizeof(rnd));
-      j = rnd % n; // no rejection sampling, but for useful code-based parameters with n <= 13 this seem tolerable
-
-      tmp = L[j];
-      L[j] = L[i];
-      L[i] = tmp;
+       // no rejection sampling, but for useful code-based parameters with n <= 13 this seem tolerable
+      std::swap(L[i], L[rnd % L.size()]);
       }
    }
 
@@ -234,7 +229,7 @@ McEliece_PrivateKey generate_mceliece_key( RandomNumberGenerator & rng, u32bit e
       {
       L[i]=i;
       }
-   randomize_support(code_length,L,rng);
+   randomize_support(L, rng);
    polyn_gf2m g(sp_field); // create as zero
    bool success = false;
    do
diff --git a/src/lib/pubkey/mce/polyn_gf2m.cpp b/src/lib/pubkey/mce/polyn_gf2m.cpp
index 4d9bcf2e8..ec60213db 100644
--- a/src/lib/pubkey/mce/polyn_gf2m.cpp
+++ b/src/lib/pubkey/mce/polyn_gf2m.cpp
@@ -4,6 +4,7 @@
  *
  * (C) 2014 cryptosource GmbH
  * (C) 2014 Falko Strenzke [email protected]
+ * (C) 2015 Jack Lloyd
  *
  * Botan is released under the Simplified BSD License (see license.txt)
  *
@@ -14,6 +15,7 @@
 #include <botan/internal/bit_ops.h>
 #include <botan/rng.h>
 #include <botan/exceptn.h>
+#include <botan/loadstor.h>
 
 namespace Botan {
 
@@ -25,6 +27,9 @@ gf2m generate_gf2m_mask(gf2m a)
    return ~(result - 1);
    }
 
+/**
+* number of leading zeros
+*/
 unsigned nlz_16bit(u16bit x)
    {
    unsigned n;
@@ -55,24 +60,31 @@ int polyn_gf2m::calc_degree_secure() const
    const_cast<polyn_gf2m*>(this)->m_deg = result;
    return result;
    }
-/**
-* number of leading zeros
-*/
 
-gf2m random_code_element(unsigned code_length, Botan::RandomNumberGenerator& rng)
+gf2m random_gf2m(RandomNumberGenerator& rng)
+   {
+   byte b[2];
+   rng.randomize(b, sizeof(b));
+   return make_u16bit(b[1], b[0]);
+   }
+
+gf2m random_code_element(unsigned code_length, RandomNumberGenerator& rng)
    {
    if(code_length == 0)
       {
       throw Invalid_Argument("random_code_element() was supplied a code length of zero");
       }
-   unsigned nlz = nlz_16bit(code_length-1);
-   gf2m mask = (1 << (16-nlz)) -1;
+   const unsigned nlz = nlz_16bit(code_length-1);
+   const gf2m mask = (1 << (16-nlz)) -1;
+
    gf2m result;
+
    do
       {
-      rng.randomize(reinterpret_cast<byte*>(&result), sizeof(result));
+      result = random_gf2m(rng);
       result &= mask;
       } while(result >= code_length); // rejection sampling
+
    return result;
    }
 
diff --git a/src/lib/pubkey/mce/polyn_gf2m.h b/src/lib/pubkey/mce/polyn_gf2m.h
index 1c8cc5211..5d012f27b 100644
--- a/src/lib/pubkey/mce/polyn_gf2m.h
+++ b/src/lib/pubkey/mce/polyn_gf2m.h
@@ -152,6 +152,7 @@ struct polyn_gf2m
       std::shared_ptr<GF2m_Field> msp_field;
    };
 
+gf2m random_gf2m(RandomNumberGenerator& rng);
 gf2m random_code_element(unsigned code_length, RandomNumberGenerator& rng);
 
 std::vector<polyn_gf2m> syndrome_init(polyn_gf2m const& generator, std::vector<gf2m> const& support, int n);
diff --git a/src/lib/pubkey/rsa/openssl_rsa.cpp b/src/lib/pubkey/rsa/openssl_rsa.cpp
index f2825634a..a25c8552e 100644
--- a/src/lib/pubkey/rsa/openssl_rsa.cpp
+++ b/src/lib/pubkey/rsa/openssl_rsa.cpp
@@ -11,6 +11,7 @@
 
 #include <botan/internal/openssl.h>
 #include <botan/internal/pk_utils.h>
+#include <botan/internal/ct_utils.h>
 #include <functional>
 #include <memory>
 
@@ -35,22 +36,6 @@ std::pair<int, size_t> get_openssl_enc_pad(const std::string& eme)
       throw Lookup_Error("OpenSSL RSA does not support EME " + eme);
    }
 
-secure_vector<byte> strip_leading_zeros(const secure_vector<byte>& input)
-   {
-   size_t leading_zeros = 0;
-
-   for(size_t i = 0; i != input.size(); ++i)
-      {
-      if(input[i] != 0)
-         break;
-      ++leading_zeros;
-      }
-
-   secure_vector<byte> output(&input[leading_zeros],
-                              &input[input.size()]);
-   return output;
-   }
-
 class OpenSSL_RSA_Encryption_Operation : public PK_Ops::Encryption
    {
    public:
@@ -164,8 +149,9 @@ class OpenSSL_RSA_Decryption_Operation : public PK_Ops::Decryption
 
          if(m_padding == RSA_NO_PADDING)
             {
-            return strip_leading_zeros(buf);
+            return CT::strip_leading_zeros(buf);
             }
+
          return buf;
          }
 
@@ -219,7 +205,7 @@ class OpenSSL_RSA_Verification_Operation : public PK_Ops::Verification_with_EMSA
          if(rc < 0)
             throw Invalid_Argument("RSA_public_decrypt");
 
-         return strip_leading_zeros(outbuf);
+         return CT::strip_leading_zeros(outbuf);
          }
    private:
       std::unique_ptr<RSA, std::function<void (RSA*)>> m_openssl_rsa;
diff --git a/src/lib/rng/rng.h b/src/lib/rng/rng.h
index 6ee67f66f..261880d5d 100644
--- a/src/lib/rng/rng.h
+++ b/src/lib/rng/rng.h
@@ -75,6 +75,14 @@ class BOTAN_DLL RandomNumberGenerator
       */
       byte next_byte() { return get_random<byte>(); }
 
+      byte next_nonzero_byte()
+         {
+         byte b = next_byte();
+         while(b == 0)
+            b = next_byte();
+         return b;
+         }
+
       /**
       * Check whether this RNG is seeded.
       * @return true if this RNG was already seeded, false otherwise.
diff --git a/src/lib/tls/credentials_manager.cpp b/src/lib/tls/credentials_manager.cpp
index 6443bb246..43ba7650a 100644
--- a/src/lib/tls/credentials_manager.cpp
+++ b/src/lib/tls/credentials_manager.cpp
@@ -104,6 +104,17 @@ bool cert_in_some_store(const std::vector<Certificate_Store*>& trusted_CAs,
    return false;
    }
 
+Usage_Type choose_leaf_usage(const std::string& ctx)
+   {
+   // These are reversed because ctx is denoting the current perspective
+   if(ctx == "tls-client")
+      return Usage_Type::TLS_SERVER_AUTH;
+   else if(ctx == "tls-server")
+      return Usage_Type::TLS_CLIENT_AUTH;
+   else
+      return Usage_Type::UNSPECIFIED;
+   }
+
 }
 
 void Credentials_Manager::verify_certificate_chain(
@@ -120,16 +131,12 @@ void Credentials_Manager::verify_certificate_chain(
 
    auto result = x509_path_validate(cert_chain,
                                     restrictions,
-                                    trusted_CAs);
-
-   if(!result.successful_validation())
-      throw std::runtime_error("Certificate validation failure: " + result.result_string());
+                                    trusted_CAs,
+                                    purported_hostname,
+                                    choose_leaf_usage(type));
 
    if(!cert_in_some_store(trusted_CAs, result.trust_root()))
       throw std::runtime_error("Certificate chain roots in unknown/untrusted CA");
-
-   if(purported_hostname != "" && !cert_chain[0].matches_dns_name(purported_hostname))
-      throw std::runtime_error("Certificate did not match hostname");
    }
 
 }
diff --git a/src/lib/tls/msg_client_hello.cpp b/src/lib/tls/msg_client_hello.cpp
index 82ba6f4f6..77bdc5cf5 100644
--- a/src/lib/tls/msg_client_hello.cpp
+++ b/src/lib/tls/msg_client_hello.cpp
@@ -1,6 +1,6 @@
 /*
 * TLS Hello Request and Client Hello Messages
-* (C) 2004-2011 Jack Lloyd
+* (C) 2004-2011,2015 Jack Lloyd
 *
 * Botan is released under the Simplified BSD License (see license.txt)
 */
@@ -210,11 +210,11 @@ Client_Hello::Client_Hello(const std::vector<byte>& buf)
 
    m_random = reader.get_fixed<byte>(32);
 
+   m_session_id = reader.get_range<byte>(1, 0, 32);
+
    if(m_version.is_datagram_protocol())
       m_hello_cookie = reader.get_range<byte>(1, 0, 255);
 
-   m_session_id = reader.get_range<byte>(1, 0, 32);
-
    m_suites = reader.get_range_vector<u16bit>(2, 1, 32767);
 
    m_comp_methods = reader.get_range_vector<byte>(1, 1, 255);
diff --git a/src/lib/tls/msg_client_kex.cpp b/src/lib/tls/msg_client_kex.cpp
index c8dc2aad8..c5b9305c7 100644
--- a/src/lib/tls/msg_client_kex.cpp
+++ b/src/lib/tls/msg_client_kex.cpp
@@ -17,31 +17,12 @@
 #include <botan/srp6.h>
 #include <botan/rng.h>
 #include <botan/loadstor.h>
+#include <botan/internal/ct_utils.h>
 
 namespace Botan {
 
 namespace TLS {
 
-namespace {
-
-secure_vector<byte> strip_leading_zeros(const secure_vector<byte>& input)
-   {
-   size_t leading_zeros = 0;
-
-   for(size_t i = 0; i != input.size(); ++i)
-      {
-      if(input[i] != 0)
-         break;
-      ++leading_zeros;
-      }
-
-   secure_vector<byte> output(&input[leading_zeros],
-                              &input[input.size()]);
-   return output;
-   }
-
-}
-
 /*
 * Create a new Client Key Exchange message
 */
@@ -134,7 +115,7 @@ Client_Key_Exchange::Client_Key_Exchange(Handshake_IO& io,
 
          PK_Key_Agreement ka(priv_key, "Raw");
 
-         secure_vector<byte> dh_secret = strip_leading_zeros(
+         secure_vector<byte> dh_secret = CT::strip_leading_zeros(
             ka.derive_key(0, counterparty_key.public_value()).bits_of());
 
          if(kex_algo == "DH")
@@ -373,7 +354,7 @@ Client_Key_Exchange::Client_Key_Exchange(const std::vector<byte>& contents,
             secure_vector<byte> shared_secret = ka.derive_key(0, client_pubkey).bits_of();
 
             if(ka_key->algo_name() == "DH")
-               shared_secret = strip_leading_zeros(shared_secret);
+               shared_secret = CT::strip_leading_zeros(shared_secret);
 
             if(kex_algo == "DHE_PSK" || kex_algo == "ECDHE_PSK")
                {
diff --git a/src/lib/tls/tls_channel.cpp b/src/lib/tls/tls_channel.cpp
index e2b1aad9d..5dfcec34e 100644
--- a/src/lib/tls/tls_channel.cpp
+++ b/src/lib/tls/tls_channel.cpp
@@ -23,17 +23,21 @@ Channel::Channel(output_fn output_fn,
                  data_cb data_cb,
                  alert_cb alert_cb,
                  handshake_cb handshake_cb,
+                 handshake_msg_cb handshake_msg_cb,
                  Session_Manager& session_manager,
                  RandomNumberGenerator& rng,
+                 const Policy& policy,
                  bool is_datagram,
                  size_t reserved_io_buffer_size) :
    m_is_datagram(is_datagram),
-   m_handshake_cb(handshake_cb),
    m_data_cb(data_cb),
    m_alert_cb(alert_cb),
    m_output_fn(output_fn),
-   m_rng(rng),
-   m_session_manager(session_manager)
+   m_handshake_cb(handshake_cb),
+   m_handshake_msg_cb(handshake_msg_cb),
+   m_session_manager(session_manager),
+   m_policy(policy),
+   m_rng(rng)
    {
    /* epoch 0 is plaintext, thus null cipher state */
    m_write_cipher_states[0] = nullptr;
@@ -66,20 +70,16 @@ Connection_Sequence_Numbers& Channel::sequence_numbers() const
 std::shared_ptr<Connection_Cipher_State> Channel::read_cipher_state_epoch(u16bit epoch) const
    {
    auto i = m_read_cipher_states.find(epoch);
-
-   BOTAN_ASSERT(i != m_read_cipher_states.end(),
-                "Have a cipher state for the specified epoch");
-
+   if(i == m_read_cipher_states.end())
+      throw Internal_Error("TLS::Channel No read cipherstate for epoch " + std::to_string(epoch));
    return i->second;
    }
 
 std::shared_ptr<Connection_Cipher_State> Channel::write_cipher_state_epoch(u16bit epoch) const
    {
    auto i = m_write_cipher_states.find(epoch);
-
-   BOTAN_ASSERT(i != m_write_cipher_states.end(),
-                "Have a cipher state for the specified epoch");
-
+   if(i == m_write_cipher_states.end())
+      throw Internal_Error("TLS::Channel No write cipherstate for epoch " + std::to_string(epoch));
    return i->second;
    }
 
@@ -120,17 +120,17 @@ Handshake_State& Channel::create_handshake_state(Protocol_Version version)
    std::unique_ptr<Handshake_IO> io;
    if(version.is_datagram_protocol())
       {
-      // default MTU is IPv6 min MTU minus UDP/IP headers (TODO: make configurable)
-      const u16bit mtu = 1280 - 40 - 8;
-
       io.reset(new Datagram_Handshake_IO(
                   std::bind(&Channel::send_record_under_epoch, this, _1, _2, _3),
                   sequence_numbers(),
-                  mtu));
+                  m_policy.dtls_default_mtu(),
+                  m_policy.dtls_initial_timeout(),
+                  m_policy.dtls_maximum_timeout()));
       }
    else
-      io.reset(new Stream_Handshake_IO(
-                  std::bind(&Channel::send_record, this, _1, _2)));
+      {
+      io.reset(new Stream_Handshake_IO(std::bind(&Channel::send_record, this, _1, _2)));
+      }
 
    m_pending_state.reset(new_handshake_state(io.release()));
 
@@ -333,12 +333,13 @@ size_t Channel::received_data(const byte input[], size_t input_size)
 
          if(record.size() > max_fragment_size)
             throw TLS_Exception(Alert::RECORD_OVERFLOW,
-                                "Plaintext record is too large");
+                                "TLS input record is larger than allowed maximum");
 
          if(record_type == HANDSHAKE || record_type == CHANGE_CIPHER_SPEC)
             {
             if(!m_pending_state)
                {
+               // No pending handshake, possibly new:
                if(record_version.is_datagram_protocol())
                   {
                   if(m_sequence_numbers)
@@ -374,6 +375,7 @@ size_t Channel::received_data(const byte input[], size_t input_size)
                   }
                }
 
+            // May have been created in above conditional
             if(m_pending_state)
                {
                m_pending_state->handshake_io().add_record(unlock(record),
diff --git a/src/lib/tls/tls_channel.h b/src/lib/tls/tls_channel.h
index 4e6874a16..9ef2d17c4 100644
--- a/src/lib/tls/tls_channel.h
+++ b/src/lib/tls/tls_channel.h
@@ -24,6 +24,7 @@ namespace TLS {
 class Connection_Cipher_State;
 class Connection_Sequence_Numbers;
 class Handshake_State;
+class Handshake_Message;
 
 /**
 * Generic interface for TLS endpoint
@@ -35,15 +36,18 @@ class BOTAN_DLL Channel
       typedef std::function<void (const byte[], size_t)> data_cb;
       typedef std::function<void (Alert, const byte[], size_t)> alert_cb;
       typedef std::function<bool (const Session&)> handshake_cb;
+      typedef std::function<void (const Handshake_Message&)> handshake_msg_cb;
 
       Channel(output_fn out,
               data_cb app_data_cb,
               alert_cb alert_cb,
               handshake_cb hs_cb,
+              handshake_msg_cb hs_msg_cb,
               Session_Manager& session_manager,
               RandomNumberGenerator& rng,
+              const Policy& policy,
               bool is_datagram,
-              size_t reserved_io_buffer_size);
+              size_t io_buf_sz = 16*1024);
 
       Channel(const Channel&) = delete;
 
@@ -196,6 +200,8 @@ class BOTAN_DLL Channel
 
       Handshake_State& create_handshake_state(Protocol_Version version);
 
+      void inspect_handshake_message(const Handshake_Message& msg);
+
       void activate_session();
 
       void change_cipher_spec_reader(Connection_Side side);
@@ -214,8 +220,11 @@ class BOTAN_DLL Channel
 
       Session_Manager& session_manager() { return m_session_manager; }
 
+      const Policy& policy() const { return m_policy; }
+
       bool save_session(const Session& session) const { return m_handshake_cb(session); }
 
+      handshake_msg_cb get_handshake_msg_cb() const { return m_handshake_msg_cb; }
    private:
       size_t maximum_fragment_size() const;
 
@@ -245,14 +254,16 @@ class BOTAN_DLL Channel
       bool m_is_datagram;
 
       /* callbacks */
-      handshake_cb m_handshake_cb;
       data_cb m_data_cb;
       alert_cb m_alert_cb;
       output_fn m_output_fn;
+      handshake_cb m_handshake_cb;
+      handshake_msg_cb m_handshake_msg_cb;
 
       /* external state */
-      RandomNumberGenerator& m_rng;
       Session_Manager& m_session_manager;
+      const Policy& m_policy;
+      RandomNumberGenerator& m_rng;
 
       /* sequence number state */
       std::unique_ptr<Connection_Sequence_Numbers> m_sequence_numbers;
diff --git a/src/lib/tls/tls_client.cpp b/src/lib/tls/tls_client.cpp
index 9306092ce..82630b7fa 100644
--- a/src/lib/tls/tls_client.cpp
+++ b/src/lib/tls/tls_client.cpp
@@ -1,6 +1,6 @@
 /*
 * TLS Client
-* (C) 2004-2011,2012 Jack Lloyd
+* (C) 2004-2011,2012,2015 Jack Lloyd
 *
 * Botan is released under the Simplified BSD License (see license.txt)
 */
@@ -23,8 +23,7 @@ class Client_Handshake_State : public Handshake_State
    public:
       // using Handshake_State::Handshake_State;
 
-      Client_Handshake_State(Handshake_IO* io, hs_msg_cb cb = hs_msg_cb()) :
-         Handshake_State(io, cb) {}
+      Client_Handshake_State(Handshake_IO* io, handshake_msg_cb cb) : Handshake_State(io, cb) {}
 
       const Public_Key& get_server_public_Key() const
          {
@@ -55,9 +54,31 @@ Client::Client(output_fn output_fn,
                const Protocol_Version offer_version,
                const std::vector<std::string>& next_protos,
                size_t io_buf_sz) :
-   Channel(output_fn, proc_cb, alert_cb, handshake_cb, session_manager, rng,
-           offer_version.is_datagram_protocol(), io_buf_sz),
-   m_policy(policy),
+   Channel(output_fn, proc_cb, alert_cb, handshake_cb, Channel::handshake_msg_cb(),
+           session_manager, rng, policy, offer_version.is_datagram_protocol(), io_buf_sz),
+   m_creds(creds),
+   m_info(info)
+   {
+   const std::string srp_identifier = m_creds.srp_identifier("tls-client", m_info.hostname());
+
+   Handshake_State& state = create_handshake_state(offer_version);
+   send_client_hello(state, false, offer_version, srp_identifier, next_protos);
+   }
+
+Client::Client(output_fn output_fn,
+               data_cb proc_cb,
+               alert_cb alert_cb,
+               handshake_cb handshake_cb,
+               handshake_msg_cb hs_msg_cb,
+               Session_Manager& session_manager,
+               Credentials_Manager& creds,
+               const Policy& policy,
+               RandomNumberGenerator& rng,
+               const Server_Information& info,
+               const Protocol_Version offer_version,
+               const std::vector<std::string>& next_protos) :
+   Channel(output_fn, proc_cb, alert_cb, handshake_cb, hs_msg_cb,
+           session_manager, rng, policy, offer_version.is_datagram_protocol()),
    m_creds(creds),
    m_info(info)
    {
@@ -69,7 +90,7 @@ Client::Client(output_fn output_fn,
 
 Handshake_State* Client::new_handshake_state(Handshake_IO* io)
    {
-   return new Client_Handshake_State(io); // , m_hs_msg_cb);
+   return new Client_Handshake_State(io, get_handshake_msg_cb());
    }
 
 std::vector<X509_Certificate>
@@ -111,7 +132,7 @@ void Client::send_client_hello(Handshake_State& state_base,
             state.client_hello(new Client_Hello(
                state.handshake_io(),
                state.hash(),
-               m_policy,
+               policy(),
                rng(),
                secure_renegotiation_data_for_client_hello(),
                session_info,
@@ -128,7 +149,7 @@ void Client::send_client_hello(Handshake_State& state_base,
          state.handshake_io(),
          state.hash(),
          version,
-         m_policy,
+         policy(),
          rng(),
          secure_renegotiation_data_for_client_hello(),
          next_protocols,
@@ -157,9 +178,9 @@ void Client::process_handshake_msg(const Handshake_State* active_state,
       if(state.client_hello())
          return;
 
-      if(m_policy.allow_server_initiated_renegotiation())
+      if(policy().allow_server_initiated_renegotiation())
          {
-         if(!secure_renegotiation_supported() && m_policy.allow_insecure_renegotiation() == false)
+         if(!secure_renegotiation_supported() && policy().allow_insecure_renegotiation() == false)
             send_warning_alert(Alert::NO_RENEGOTIATION);
          else
             this->initiate_handshake(state, false);
@@ -263,7 +284,9 @@ void Client::process_handshake_msg(const Handshake_State* active_state,
          if(state.server_hello()->supports_session_ticket())
             state.set_expected_next(NEW_SESSION_TICKET);
          else
+            {
             state.set_expected_next(HANDSHAKE_CCS);
+            }
          }
       else
          {
@@ -282,7 +305,7 @@ void Client::process_handshake_msg(const Handshake_State* active_state,
                                 "Server replied with later version than in hello");
             }
 
-         if(!m_policy.acceptable_protocol_version(state.version()))
+         if(!policy().acceptable_protocol_version(state.version()))
             {
             throw TLS_Exception(Alert::PROTOCOL_VERSION,
                                 "Server version " + state.version().to_string() +
@@ -406,7 +429,7 @@ void Client::process_handshake_msg(const Handshake_State* active_state,
       state.client_kex(
          new Client_Key_Exchange(state.handshake_io(),
                                  state,
-                                 m_policy,
+                                 policy(),
                                  m_creds,
                                  state.server_public_key.get(),
                                  m_info.hostname(),
@@ -426,7 +449,7 @@ void Client::process_handshake_msg(const Handshake_State* active_state,
          state.client_verify(
             new Certificate_Verify(state.handshake_io(),
                                    state,
-                                   m_policy,
+                                   policy(),
                                    rng(),
                                    private_key)
             );
@@ -477,7 +500,7 @@ void Client::process_handshake_msg(const Handshake_State* active_state,
       const std::vector<byte>& session_ticket = state.session_ticket();
 
       if(session_id.empty() && !session_ticket.empty())
-         session_id = make_hello_random(rng(), m_policy);
+         session_id = make_hello_random(rng(), policy());
 
       Session session_info(
          session_id,
diff --git a/src/lib/tls/tls_client.h b/src/lib/tls/tls_client.h
index e4e0dc363..b835c013e 100644
--- a/src/lib/tls/tls_client.h
+++ b/src/lib/tls/tls_client.h
@@ -67,6 +67,20 @@ class BOTAN_DLL Client : public Channel
              size_t reserved_io_buffer_size = 16*1024
          );
 
+      Client(output_fn out,
+             data_cb app_data_cb,
+             alert_cb alert_cb,
+             handshake_cb hs_cb,
+             handshake_msg_cb hs_msg_cb,
+             Session_Manager& session_manager,
+             Credentials_Manager& creds,
+             const Policy& policy,
+             RandomNumberGenerator& rng,
+             const Server_Information& server_info = Server_Information(),
+             const Protocol_Version offer_version = Protocol_Version::latest_tls_version(),
+             const std::vector<std::string>& next_protocols = {}
+         );
+
       const std::string& application_protocol() const { return m_application_protocol; }
    private:
       std::vector<X509_Certificate>
@@ -88,7 +102,6 @@ class BOTAN_DLL Client : public Channel
 
       Handshake_State* new_handshake_state(Handshake_IO* io) override;
 
-      const Policy& m_policy;
       Credentials_Manager& m_creds;
       const Server_Information m_info;
       std::string m_application_protocol;
diff --git a/src/lib/tls/tls_handshake_io.cpp b/src/lib/tls/tls_handshake_io.cpp
index 6286eab08..f39c9f84e 100644
--- a/src/lib/tls/tls_handshake_io.cpp
+++ b/src/lib/tls/tls_handshake_io.cpp
@@ -1,6 +1,6 @@
 /*
 * TLS Handshake IO
-* (C) 2012,2014 Jack Lloyd
+* (C) 2012,2014,2015 Jack Lloyd
 *
 * Botan is released under the Simplified BSD License (see license.txt)
 */
@@ -33,6 +33,24 @@ void store_be24(byte out[3], size_t val)
    out[2] = get_byte<u32bit>(3, val);
    }
 
+u64bit steady_clock_ms()
+   {
+   return std::chrono::duration_cast<std::chrono::milliseconds>(
+      std::chrono::steady_clock::now().time_since_epoch()).count();
+   }
+
+size_t split_for_mtu(size_t mtu, size_t msg_size)
+   {
+   const size_t DTLS_HEADERS_SIZE = 25; // DTLS record+handshake headers
+
+   const size_t parts = (msg_size + mtu) / mtu;
+
+   if(parts + DTLS_HEADERS_SIZE > mtu)
+      return parts + 1;
+
+   return parts;
+   }
+
 }
 
 Protocol_Version Stream_Handshake_IO::initial_record_version() const
@@ -123,41 +141,15 @@ Protocol_Version Datagram_Handshake_IO::initial_record_version() const
    return Protocol_Version::DTLS_V10;
    }
 
-namespace {
-
-// 1 second initial timeout, 60 second max - see RFC 6347 sec 4.2.4.1
-const u64bit INITIAL_TIMEOUT = 1*1000;
-const u64bit MAXIMUM_TIMEOUT = 60*1000;
-
-u64bit steady_clock_ms()
+void Datagram_Handshake_IO::retransmit_last_flight()
    {
-   return std::chrono::duration_cast<std::chrono::milliseconds>(
-      std::chrono::steady_clock::now().time_since_epoch()).count();
+   const size_t flight_idx = (m_flights.size() == 1) ? 0 : (m_flights.size() - 2);
+   retransmit_flight(flight_idx);
    }
 
-}
-
-bool Datagram_Handshake_IO::timeout_check()
+void Datagram_Handshake_IO::retransmit_flight(size_t flight_idx)
    {
-   if(m_last_write == 0 || (m_flights.size() > 1 && !m_flights.rbegin()->empty()))
-      {
-      /*
-      If we haven't written anything yet obviously no timeout.
-      Also no timeout possible if we are mid-flight,
-      */
-      return false;
-      }
-
-   const u64bit ms_since_write = steady_clock_ms() - m_last_write;
-
-   if(ms_since_write < m_next_timeout)
-      return false;
-
-   std::vector<u16bit> flight;
-   if(m_flights.size() == 1)
-      flight = m_flights.at(0); // lost initial client hello
-   else
-      flight = m_flights.at(m_flights.size() - 2);
+   const std::vector<u16bit>& flight = m_flights.at(flight_idx);
 
    BOTAN_ASSERT(flight.size() > 0, "Nonempty flight to retransmit");
 
@@ -177,8 +169,27 @@ bool Datagram_Handshake_IO::timeout_check()
       send_message(msg_seq, msg.epoch, msg.msg_type, msg.msg_bits);
       epoch = msg.epoch;
       }
+   }
+
+bool Datagram_Handshake_IO::timeout_check()
+   {
+   if(m_last_write == 0 || (m_flights.size() > 1 && !m_flights.rbegin()->empty()))
+      {
+      /*
+      If we haven't written anything yet obviously no timeout.
+      Also no timeout possible if we are mid-flight,
+      */
+      return false;
+      }
+
+   const u64bit ms_since_write = steady_clock_ms() - m_last_write;
+
+   if(ms_since_write < m_next_timeout)
+      return false;
 
-   m_next_timeout = std::min(2 * m_next_timeout, MAXIMUM_TIMEOUT);
+   retransmit_last_flight();
+
+   m_next_timeout = std::min(2 * m_next_timeout, m_max_timeout);
    return true;
    }
 
@@ -251,7 +262,6 @@ Datagram_Handshake_IO::get_next_record(bool expecting_ccs)
          if(m_ccs_epochs.count(current_epoch))
             return std::make_pair(HANDSHAKE_CCS, std::vector<byte>());
          }
-
       return std::make_pair(HANDSHAKE_NONE, std::vector<byte>());
       }
 
@@ -376,21 +386,6 @@ Datagram_Handshake_IO::format(const std::vector<byte>& msg,
    return format_w_seq(msg, type, m_in_message_seq - 1);
    }
 
-namespace {
-
-size_t split_for_mtu(size_t mtu, size_t msg_size)
-   {
-   const size_t DTLS_HEADERS_SIZE = 25; // DTLS record+handshake headers
-
-   const size_t parts = (msg_size + mtu) / mtu;
-
-   if(parts + DTLS_HEADERS_SIZE > mtu)
-      return parts + 1;
-
-   return parts;
-   }
-
-}
 
 std::vector<byte>
 Datagram_Handshake_IO::send(const Handshake_Message& msg)
@@ -411,7 +406,7 @@ Datagram_Handshake_IO::send(const Handshake_Message& msg)
 
    m_out_message_seq += 1;
    m_last_write = steady_clock_ms();
-   m_next_timeout = INITIAL_TIMEOUT;
+   m_next_timeout = m_initial_timeout;
 
    return send_message(m_out_message_seq - 1, epoch, msg_type, msg_bits);
    }
@@ -425,7 +420,9 @@ std::vector<byte> Datagram_Handshake_IO::send_message(u16bit msg_seq,
       format_w_seq(msg_bits, msg_type, msg_seq);
 
    if(no_fragment.size() + DTLS_HEADER_SIZE <= m_mtu)
+      {
       m_send_hs(epoch, HANDSHAKE, no_fragment);
+      }
    else
       {
       const size_t parts = split_for_mtu(m_mtu, msg_bits.size());
diff --git a/src/lib/tls/tls_handshake_io.h b/src/lib/tls/tls_handshake_io.h
index 00074a744..a1c1c5ce3 100644
--- a/src/lib/tls/tls_handshake_io.h
+++ b/src/lib/tls/tls_handshake_io.h
@@ -100,8 +100,14 @@ class Datagram_Handshake_IO : public Handshake_IO
 
       Datagram_Handshake_IO(writer_fn writer,
                             class Connection_Sequence_Numbers& seq,
-                            u16bit mtu) :
-         m_seqs(seq), m_flights(1), m_send_hs(writer), m_mtu(mtu) {}
+                            u16bit mtu, u64bit initial_timeout_ms, u64bit max_timeout_ms) :
+         m_seqs(seq),
+         m_flights(1),
+         m_initial_timeout(initial_timeout_ms),
+         m_max_timeout(max_timeout_ms),
+         m_send_hs(writer),
+         m_mtu(mtu)
+         {}
 
       Protocol_Version initial_record_version() const override;
 
@@ -120,6 +126,9 @@ class Datagram_Handshake_IO : public Handshake_IO
       std::pair<Handshake_Type, std::vector<byte>>
          get_next_record(bool expecting_ccs) override;
    private:
+      void retransmit_flight(size_t flight);
+      void retransmit_last_flight();
+
       std::vector<byte> format_fragment(
          const byte fragment[],
          size_t fragment_len,
@@ -183,6 +192,9 @@ class Datagram_Handshake_IO : public Handshake_IO
       std::vector<std::vector<u16bit>> m_flights;
       std::map<u16bit, Message_Info> m_flight_data;
 
+      u64bit m_initial_timeout = 0;
+      u64bit m_max_timeout = 0;
+
       u64bit m_last_write = 0;
       u64bit m_next_timeout = 0;
 
diff --git a/src/lib/tls/tls_handshake_msg.h b/src/lib/tls/tls_handshake_msg.h
index 6937d4f2c..7e527abf4 100644
--- a/src/lib/tls/tls_handshake_msg.h
+++ b/src/lib/tls/tls_handshake_msg.h
@@ -22,6 +22,8 @@ namespace TLS {
 class BOTAN_DLL Handshake_Message
    {
    public:
+      std::string type_string() const;
+
       virtual Handshake_Type type() const = 0;
 
       virtual std::vector<byte> serialize() const = 0;
diff --git a/src/lib/tls/tls_handshake_state.cpp b/src/lib/tls/tls_handshake_state.cpp
index cbbca3a0d..f885d3b08 100644
--- a/src/lib/tls/tls_handshake_state.cpp
+++ b/src/lib/tls/tls_handshake_state.cpp
@@ -1,6 +1,6 @@
 /*
 * TLS Handshaking
-* (C) 2004-2006,2011,2012 Jack Lloyd
+* (C) 2004-2006,2011,2012,2015 Jack Lloyd
 *
 * Botan is released under the Simplified BSD License (see license.txt)
 */
@@ -13,6 +13,67 @@ namespace Botan {
 
 namespace TLS {
 
+std::string Handshake_Message::type_string() const
+   {
+   return handshake_type_to_string(type());
+   }
+
+const char* handshake_type_to_string(Handshake_Type type)
+   {
+   switch(type)
+      {
+      case HELLO_VERIFY_REQUEST:
+         return "hello_verify_request";
+
+      case HELLO_REQUEST:
+         return "hello_request";
+
+      case CLIENT_HELLO:
+         return "client_hello";
+
+      case SERVER_HELLO:
+         return "server_hello";
+
+      case CERTIFICATE:
+         return "certificate";
+
+      case CERTIFICATE_URL:
+         return "certificate_url";
+
+      case CERTIFICATE_STATUS:
+         return "certificate_status";
+
+      case SERVER_KEX:
+         return "server_key_exchange";
+
+      case CERTIFICATE_REQUEST:
+         return "certificate_request";
+
+      case SERVER_HELLO_DONE:
+         return "server_hello_done";
+
+      case CERTIFICATE_VERIFY:
+         return "certificate_verify";
+
+      case CLIENT_KEX:
+         return "client_key_exchange";
+
+      case NEW_SESSION_TICKET:
+         return "new_session_ticket";
+
+      case HANDSHAKE_CCS:
+         return "change_cipher_spec";
+
+      case FINISHED:
+         return "finished";
+
+      case HANDSHAKE_NONE:
+         return "invalid";
+      }
+
+   throw Internal_Error("Unknown TLS handshake message type " + std::to_string(type));
+   }
+
 namespace {
 
 u32bit bitmask_for_handshake_type(Handshake_Type type)
@@ -25,9 +86,6 @@ u32bit bitmask_for_handshake_type(Handshake_Type type)
       case HELLO_REQUEST:
          return (1 << 1);
 
-      /*
-      * Same code point for both client hello styles
-      */
       case CLIENT_HELLO:
          return (1 << 2);
 
@@ -75,12 +133,48 @@ u32bit bitmask_for_handshake_type(Handshake_Type type)
    throw Internal_Error("Unknown handshake type " + std::to_string(type));
    }
 
+std::string handshake_mask_to_string(u32bit mask)
+   {
+   const Handshake_Type types[] = {
+      HELLO_VERIFY_REQUEST,
+      HELLO_REQUEST,
+      CLIENT_HELLO,
+      CERTIFICATE,
+      CERTIFICATE_URL,
+      CERTIFICATE_STATUS,
+      SERVER_KEX,
+      CERTIFICATE_REQUEST,
+      SERVER_HELLO_DONE,
+      CERTIFICATE_VERIFY,
+      CLIENT_KEX,
+      NEW_SESSION_TICKET,
+      HANDSHAKE_CCS,
+      FINISHED
+   };
+
+   std::ostringstream o;
+   bool empty = true;
+
+   for(auto&& t : types)
+      {
+      if(mask & bitmask_for_handshake_type(t))
+         {
+         if(!empty)
+            o << ",";
+         o << handshake_type_to_string(t);
+         empty = false;
+         }
+      }
+
+   return o.str();
+   }
+
 }
 
 /*
 * Initialize the SSL/TLS Handshake State
 */
-Handshake_State::Handshake_State(Handshake_IO* io, hs_msg_cb cb) :
+Handshake_State::Handshake_State(Handshake_IO* io, handshake_msg_cb cb) :
    m_msg_callback(cb),
    m_handshake_io(io),
    m_version(m_handshake_io->initial_record_version())
@@ -196,10 +290,10 @@ void Handshake_State::confirm_transition_to(Handshake_Type handshake_msg)
    const bool ok = (m_hand_expecting_mask & mask); // overlap?
 
    if(!ok)
-      throw Unexpected_Message("Unexpected state transition in handshake, got " +
+      throw Unexpected_Message("Unexpected state transition in handshake, got type " +
                                std::to_string(handshake_msg) +
-                               " expected " + std::to_string(m_hand_expecting_mask) +
-                               " received " + std::to_string(m_hand_received_mask));
+                               " expected " + handshake_mask_to_string(m_hand_expecting_mask) +
+                               " received " + handshake_mask_to_string(m_hand_received_mask));
 
    /* We don't know what to expect next, so force a call to
       set_expected_next; if it doesn't happen, the next transition
diff --git a/src/lib/tls/tls_handshake_state.h b/src/lib/tls/tls_handshake_state.h
index 3b60178b4..6260b090f 100644
--- a/src/lib/tls/tls_handshake_state.h
+++ b/src/lib/tls/tls_handshake_state.h
@@ -45,9 +45,9 @@ class Finished;
 class Handshake_State
    {
    public:
-      typedef std::function<void (const Handshake_Message&)> hs_msg_cb;
+      typedef std::function<void (const Handshake_Message&)> handshake_msg_cb;
 
-      Handshake_State(Handshake_IO* io, hs_msg_cb cb);
+      Handshake_State(Handshake_IO* io, handshake_msg_cb cb);
 
       virtual ~Handshake_State();
 
@@ -170,7 +170,7 @@ class Handshake_State
 
    private:
 
-      hs_msg_cb m_msg_callback;
+      handshake_msg_cb m_msg_callback;
 
       std::unique_ptr<Handshake_IO> m_handshake_io;
 
diff --git a/src/lib/tls/tls_magic.h b/src/lib/tls/tls_magic.h
index 882e59158..6db908b08 100644
--- a/src/lib/tls/tls_magic.h
+++ b/src/lib/tls/tls_magic.h
@@ -57,6 +57,8 @@ enum Handshake_Type {
    HANDSHAKE_NONE       = 255  // Null value
 };
 
+const char* handshake_type_to_string(Handshake_Type t);
+
 enum Compression_Method {
    NO_COMPRESSION       = 0x00,
    DEFLATE_COMPRESSION  = 0x01
diff --git a/src/lib/tls/tls_policy.cpp b/src/lib/tls/tls_policy.cpp
index f50cf1f3e..d8dd2c828 100644
--- a/src/lib/tls/tls_policy.cpp
+++ b/src/lib/tls/tls_policy.cpp
@@ -20,9 +20,9 @@ std::vector<std::string> Policy::allowed_ciphers() const
    return {
       //"AES-256/OCB(12)",
       //"AES-128/OCB(12)",
-      "ChaCha20Poly1305",
       "AES-256/GCM",
       "AES-128/GCM",
+      "ChaCha20Poly1305",
       "AES-256/CCM",
       "AES-128/CCM",
       "AES-256/CCM(8)",
@@ -35,7 +35,6 @@ std::vector<std::string> Policy::allowed_ciphers() const
       //"Camellia-128",
       //"SEED"
       //"3DES",
-      //"RC4",
       };
    }
 
@@ -175,6 +174,16 @@ bool Policy::include_time_in_hello_random() const { return true; }
 bool Policy::hide_unknown_users() const { return false; }
 bool Policy::server_uses_own_ciphersuite_preferences() const { return true; }
 
+// 1 second initial timeout, 60 second max - see RFC 6347 sec 4.2.4.1
+size_t Policy::dtls_initial_timeout() const { return 1*1000; }
+size_t Policy::dtls_maximum_timeout() const { return 60*1000; }
+
+size_t Policy::dtls_default_mtu() const
+   {
+   // default MTU is IPv6 min MTU minus UDP/IP headers
+   return 1280 - 40 - 8;
+   }
+
 std::vector<u16bit> Policy::srtp_profiles() const
    {
    return std::vector<u16bit>();
diff --git a/src/lib/tls/tls_policy.h b/src/lib/tls/tls_policy.h
index 581d04bcd..c3f8f1ee2 100644
--- a/src/lib/tls/tls_policy.h
+++ b/src/lib/tls/tls_policy.h
@@ -13,6 +13,7 @@
 #include <botan/x509cert.h>
 #include <botan/dl_group.h>
 #include <vector>
+#include <sstream>
 
 namespace Botan {
 
@@ -173,6 +174,12 @@ class BOTAN_DLL Policy
       virtual std::vector<u16bit> ciphersuite_list(Protocol_Version version,
                                                    bool have_srp) const;
 
+      virtual size_t dtls_default_mtu() const;
+
+      virtual size_t dtls_initial_timeout() const;
+
+      virtual size_t dtls_maximum_timeout() const;
+
       virtual void print(std::ostream& o) const;
 
       virtual ~Policy() {}
@@ -299,6 +306,14 @@ class BOTAN_DLL Text_Policy : public Policy
          return r;
          }
 
+      void set(const std::string& k, const std::string& v) { m_kv[k] = v; }
+
+      Text_Policy(const std::string& s)
+         {
+         std::istringstream iss(s);
+         m_kv = read_cfg(iss);
+         }
+
       Text_Policy(std::istream& in)
          {
          m_kv = read_cfg(in);
diff --git a/src/lib/tls/tls_record.cpp b/src/lib/tls/tls_record.cpp
index 71542de16..e38b26547 100644
--- a/src/lib/tls/tls_record.cpp
+++ b/src/lib/tls/tls_record.cpp
@@ -12,6 +12,7 @@
 #include <botan/internal/tls_seq_numbers.h>
 #include <botan/internal/tls_session_key.h>
 #include <botan/internal/rounding.h>
+#include <botan/internal/ct_utils.h>
 #include <botan/rng.h>
 
 namespace Botan {
@@ -284,31 +285,26 @@ size_t fill_buffer_to(secure_vector<byte>& readbuf,
 *
 * Returning 0 in the error case should ensure the MAC check will fail.
 * This approach is suggested in section 6.2.3.2 of RFC 5246.
-*
-* Also returns 0 if block_size == 0, so can be safely called with a
-* stream cipher in use.
-*
-* @fixme This should run in constant time
 */
-size_t tls_padding_check(const byte record[], size_t record_len)
+u16bit tls_padding_check(const byte record[], size_t record_len)
    {
-   const size_t padding_length = record[(record_len-1)];
-
-   if(padding_length >= record_len)
-      return 0;
-
    /*
    * TLS v1.0 and up require all the padding bytes be the same value
    * and allows up to 255 bytes.
    */
-   const size_t pad_start = record_len - padding_length - 1;
 
-   volatile size_t cmp = 0;
+   const byte pad_byte = record[(record_len-1)];
 
-   for(size_t i = 0; i != padding_length; ++i)
-      cmp += record[pad_start + i] ^ padding_length;
+   byte pad_invalid = 0;
+   for(size_t i = 0; i != record_len; ++i)
+      {
+      const size_t left = record_len - i - 2;
+      const byte delim_mask = CT::is_less<u16bit>(left, pad_byte) & 0xFF;
+      pad_invalid |= (delim_mask & (record[i] ^ pad_byte));
+      }
 
-   return cmp ? 0 : padding_length + 1;
+   u16bit pad_invalid_mask = CT::expand_mask<u16bit>(pad_invalid);
+   return CT::select<u16bit>(pad_invalid_mask, 0, pad_byte + 1);
    }
 
 void cbc_decrypt_record(byte record_contents[], size_t record_len,
@@ -375,38 +371,39 @@ void decrypt_record(secure_vector<byte>& output,
    else
       {
       // GenericBlockCipher case
+      BlockCipher* bc = cs.block_cipher();
+      BOTAN_ASSERT(bc != nullptr, "No cipher state set but needed to decrypt");
 
-      volatile bool padding_bad = false;
-      size_t pad_size = 0;
+      const size_t mac_size = cs.mac_size();
+      const size_t iv_size = cs.iv_size();
 
-      if(BlockCipher* bc = cs.block_cipher())
-         {
-         cbc_decrypt_record(record_contents, record_len, cs, *bc);
+      // This early exit does not leak info because all the values are public
+      if((record_len < mac_size + iv_size) || (record_len % cs.block_size() != 0))
+         throw Decoding_Error("Record sent with invalid length");
 
-         pad_size = tls_padding_check(record_contents, record_len);
+      CT::poison(record_contents, record_len);
 
-         padding_bad = (pad_size == 0);
-         }
-      else
-         {
-         throw Internal_Error("No cipher state set but needed to decrypt");
-         }
+      cbc_decrypt_record(record_contents, record_len, cs, *bc);
 
-      const size_t mac_size = cs.mac_size();
-      const size_t iv_size = cs.iv_size();
+      // 0 if padding was invalid, otherwise 1 + padding_bytes
+      u16bit pad_size = tls_padding_check(record_contents, record_len);
 
-      const size_t mac_pad_iv_size = mac_size + pad_size + iv_size;
+      // This mask is zero if there is not enough room in the packet
+      const u16bit size_ok_mask = CT::is_less<u16bit>(mac_size + pad_size + iv_size, record_len);
+      pad_size &= size_ok_mask;
 
-      if(record_len < mac_pad_iv_size)
-         throw Decoding_Error("Record sent with invalid length");
+      CT::unpoison(record_contents, record_len);
 
-      const byte* plaintext_block = &record_contents[iv_size];
-      const u16bit plaintext_length = record_len - mac_pad_iv_size;
+      /*
+      This is unpoisoned sooner than it should. The pad_size leaks to plaintext_length and
+      then to the timing channel in the MAC computation described in the Lucky 13 paper.
+      */
+      CT::unpoison(pad_size);
 
-      cs.mac()->update(
-         cs.format_ad(record_sequence, record_type, record_version, plaintext_length)
-         );
+      const byte* plaintext_block = &record_contents[iv_size];
+      const u16bit plaintext_length = record_len - mac_size - iv_size - pad_size;
 
+      cs.mac()->update(cs.format_ad(record_sequence, record_type, record_version, plaintext_length));
       cs.mac()->update(plaintext_block, plaintext_length);
 
       std::vector<byte> mac_buf(mac_size);
@@ -414,12 +411,16 @@ void decrypt_record(secure_vector<byte>& output,
 
       const size_t mac_offset = record_len - (mac_size + pad_size);
 
-      const bool mac_bad = !same_mem(&record_contents[mac_offset], mac_buf.data(), mac_size);
+      const bool mac_ok = same_mem(&record_contents[mac_offset], mac_buf.data(), mac_size);
 
-      if(mac_bad || padding_bad)
-         throw TLS_Exception(Alert::BAD_RECORD_MAC, "Message authentication failure");
+      const u16bit ok_mask = size_ok_mask & CT::expand_mask<u16bit>(mac_ok) & CT::expand_mask<u16bit>(pad_size);
 
-      output.assign(plaintext_block, plaintext_block + plaintext_length);
+      CT::unpoison(ok_mask);
+
+      if(ok_mask)
+         output.assign(plaintext_block, plaintext_block + plaintext_length);
+      else
+         throw TLS_Exception(Alert::BAD_RECORD_MAC, "Message authentication failure");
       }
    }
 
diff --git a/src/lib/tls/tls_server.cpp b/src/lib/tls/tls_server.cpp
index 330135e63..774827346 100644
--- a/src/lib/tls/tls_server.cpp
+++ b/src/lib/tls/tls_server.cpp
@@ -21,8 +21,7 @@ class Server_Handshake_State : public Handshake_State
    public:
       // using Handshake_State::Handshake_State;
 
-      Server_Handshake_State(Handshake_IO* io, hs_msg_cb cb = hs_msg_cb()) :
-         Handshake_State(io, cb) {}
+      Server_Handshake_State(Handshake_IO* io, handshake_msg_cb cb) : Handshake_State(io, cb) {}
 
       // Used by the server only, in case of RSA key exchange. Not owned
       Private_Key* server_rsa_kex_key = nullptr;
@@ -215,9 +214,26 @@ Server::Server(output_fn output,
                next_protocol_fn next_proto,
                bool is_datagram,
                size_t io_buf_sz) :
-   Channel(output, data_cb, alert_cb, handshake_cb,
-           session_manager, rng, is_datagram, io_buf_sz),
-   m_policy(policy),
+   Channel(output, data_cb, alert_cb, handshake_cb, Channel::handshake_msg_cb(),
+           session_manager, rng, policy, is_datagram, io_buf_sz),
+   m_creds(creds),
+   m_choose_next_protocol(next_proto)
+   {
+   }
+
+Server::Server(output_fn output,
+               data_cb data_cb,
+               alert_cb alert_cb,
+               handshake_cb handshake_cb,
+               handshake_msg_cb hs_msg_cb,
+               Session_Manager& session_manager,
+               Credentials_Manager& creds,
+               const Policy& policy,
+               RandomNumberGenerator& rng,
+               next_protocol_fn next_proto,
+               bool is_datagram) :
+   Channel(output, data_cb, alert_cb, handshake_cb, hs_msg_cb,
+           session_manager, rng, policy, is_datagram),
    m_creds(creds),
    m_choose_next_protocol(next_proto)
    {
@@ -225,7 +241,9 @@ Server::Server(output_fn output,
 
 Handshake_State* Server::new_handshake_state(Handshake_IO* io)
    {
-   std::unique_ptr<Handshake_State> state(new Server_Handshake_State(io));
+   std::unique_ptr<Handshake_State> state(
+      new Server_Handshake_State(io, get_handshake_msg_cb()));
+
    state->set_expected_next(CLIENT_HELLO);
    return state.release();
    }
@@ -278,7 +296,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
       {
       const bool initial_handshake = !active_state;
 
-      if(!m_policy.allow_insecure_renegotiation() &&
+      if(!policy().allow_insecure_renegotiation() &&
          !(initial_handshake || secure_renegotiation_supported()))
          {
          send_warning_alert(Alert::NO_RENEGOTIATION);
@@ -292,7 +310,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
       Protocol_Version negotiated_version;
 
       const Protocol_Version latest_supported =
-         m_policy.latest_supported_version(client_version.is_datagram_protocol());
+         policy().latest_supported_version(client_version.is_datagram_protocol());
 
       if((initial_handshake && client_version.known_version()) ||
          (!initial_handshake && client_version == active_state->version()))
@@ -334,7 +352,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
          negotiated_version = latest_supported;
          }
 
-      if(!m_policy.acceptable_protocol_version(negotiated_version))
+      if(!policy().acceptable_protocol_version(negotiated_version))
          {
          throw TLS_Exception(Alert::PROTOCOL_VERSION,
                              "Client version " + negotiated_version.to_string() +
@@ -359,7 +377,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
                           session_manager(),
                           m_creds,
                           state.client_hello(),
-                          std::chrono::seconds(m_policy.session_ticket_lifetime()));
+                          std::chrono::seconds(policy().session_ticket_lifetime()));
 
       bool have_session_ticket_key = false;
 
@@ -387,7 +405,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
          state.server_hello(new Server_Hello(
                state.handshake_io(),
                state.hash(),
-               m_policy,
+               policy(),
                rng(),
                secure_renegotiation_data_for_server_hello(),
                *state.client_hello(),
@@ -423,7 +441,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
                   new New_Session_Ticket(state.handshake_io(),
                                          state.hash(),
                                          session_info.encrypt(ticket_key, rng()),
-                                         m_policy.session_ticket_lifetime())
+                                         policy().session_ticket_lifetime())
                   );
                }
             catch(...) {}
@@ -469,14 +487,14 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
          state.server_hello(new Server_Hello(
                state.handshake_io(),
                state.hash(),
-               m_policy,
+               policy(),
                rng(),
                secure_renegotiation_data_for_server_hello(),
                *state.client_hello(),
-               make_hello_random(rng(), m_policy), // new session ID
+               make_hello_random(rng(), policy()), // new session ID
                state.version(),
-               choose_ciphersuite(m_policy, state.version(), m_creds, cert_chains, state.client_hello()),
-               choose_compression(m_policy, state.client_hello()->compression_methods()),
+               choose_ciphersuite(policy(), state.version(), m_creds, cert_chains, state.client_hello()),
+               choose_compression(policy(), state.client_hello()->compression_methods()),
                have_session_ticket_key,
                m_next_protocol)
             );
@@ -516,7 +534,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
          else
             {
             state.server_kex(new Server_Key_Exchange(state.handshake_io(),
-                                                     state, m_policy,
+                                                     state, policy(),
                                                      m_creds, rng(), private_key));
             }
 
@@ -534,7 +552,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
             {
             state.cert_req(
                new Certificate_Req(state.handshake_io(), state.hash(),
-                                   m_policy, client_auth_CAs, state.version()));
+                                   policy(), client_auth_CAs, state.version()));
 
             state.set_expected_next(CERTIFICATE);
             }
@@ -565,7 +583,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
       state.client_kex(
          new Client_Key_Exchange(contents, state,
                                  state.server_rsa_kex_key,
-                                 m_creds, m_policy, rng())
+                                 m_creds, policy(), rng())
          );
 
       state.compute_session_keys();
@@ -649,7 +667,7 @@ void Server::process_handshake_msg(const Handshake_State* active_state,
                      new New_Session_Ticket(state.handshake_io(),
                                             state.hash(),
                                             session_info.encrypt(ticket_key, rng()),
-                                            m_policy.session_ticket_lifetime())
+                                            policy().session_ticket_lifetime())
                      );
                   }
                catch(...) {}
diff --git a/src/lib/tls/tls_server.h b/src/lib/tls/tls_server.h
index 4f2a11ba4..ffe1111bc 100644
--- a/src/lib/tls/tls_server.h
+++ b/src/lib/tls/tls_server.h
@@ -40,6 +40,19 @@ class BOTAN_DLL Server : public Channel
              size_t reserved_io_buffer_size = 16*1024
          );
 
+      Server(output_fn output,
+             data_cb data_cb,
+             alert_cb alert_cb,
+             handshake_cb handshake_cb,
+             handshake_msg_cb hs_msg_cb,
+             Session_Manager& session_manager,
+             Credentials_Manager& creds,
+             const Policy& policy,
+             RandomNumberGenerator& rng,
+             next_protocol_fn next_proto = next_protocol_fn(),
+             bool is_datagram = false
+         );
+
       /**
       * Return the protocol notification set by the client (using the
       * NPN extension) for this connection, if any. This value is not
@@ -62,7 +75,6 @@ class BOTAN_DLL Server : public Channel
 
       Handshake_State* new_handshake_state(Handshake_IO* io) override;
 
-      const Policy& m_policy;
       Credentials_Manager& m_creds;
 
       next_protocol_fn m_choose_next_protocol;
diff --git a/src/lib/utils/ct_utils.h b/src/lib/utils/ct_utils.h
index 52a3bc388..2307dd587 100644
--- a/src/lib/utils/ct_utils.h
+++ b/src/lib/utils/ct_utils.h
@@ -14,7 +14,7 @@
 #ifndef BOTAN_TIMING_ATTACK_CM_H__
 #define BOTAN_TIMING_ATTACK_CM_H__
 
-#include <botan/types.h>
+#include <botan/secmem.h>
 #include <vector>
 
 #if defined(BOTAN_USE_CTGRIND)
@@ -51,6 +51,12 @@ inline void unpoison(T* p, size_t n)
 #endif
    }
 
+template<typename T>
+inline void unpoison(T& p)
+   {
+   unpoison(&p, 1);
+   }
+
 /*
 * T should be an unsigned machine integer type
 * Expand to a mask used for other operations
@@ -90,6 +96,16 @@ inline T is_equal(T x, T y)
    }
 
 template<typename T>
+inline T is_less(T x, T y)
+   {
+   /*
+   This expands to a constant time sequence with GCC 5.2.0 on x86-64
+   but something more complicated may be needed for portable const time.
+   */
+   return expand_mask<T>(x < y);
+   }
+
+template<typename T>
 inline void conditional_copy_mem(T value,
                                  T* to,
                                  const T* from0,
@@ -102,6 +118,42 @@ inline void conditional_copy_mem(T value,
       to[i] = CT::select(mask, from0[i], from1[i]);
    }
 
+template<typename T>
+inline T expand_top_bit(T a)
+   {
+   return expand_mask<T>(a >> (sizeof(T)*8-1));
+   }
+
+template<typename T>
+inline T max(T a, T b)
+   {
+   const T a_larger = b - a; // negative if a is larger
+   return select(expand_top_bit(a), a, b);
+   }
+
+template<typename T>
+inline T min(T a, T b)
+   {
+   const T a_larger = b - a; // negative if a is larger
+   return select(expand_top_bit(b), b, a);
+   }
+
+template<typename T, typename Alloc>
+std::vector<T, Alloc> strip_leading_zeros(const std::vector<T, Alloc>& input)
+   {
+   size_t leading_zeros = 0;
+
+   uint8_t only_zeros = 0xFF;
+
+   for(size_t i = 0; i != input.size(); ++i)
+      {
+      only_zeros &= CT::is_zero(input[i]);
+      leading_zeros += CT::select<uint8_t>(only_zeros, 1, 0);
+      }
+
+   return secure_vector<byte>(input.begin() + leading_zeros, input.end());
+   }
+
 }
 
 }
diff --git a/src/lib/utils/parsing.cpp b/src/lib/utils/parsing.cpp
index ea89c8e5f..40eae656a 100644
--- a/src/lib/utils/parsing.cpp
+++ b/src/lib/utils/parsing.cpp
@@ -1,6 +1,6 @@
 /*
 * Various string utils and parsing functions
-* (C) 1999-2007,2013,2014 Jack Lloyd
+* (C) 1999-2007,2013,2014,2015 Jack Lloyd
 * (C) 2015 Simon Warta (Kullo GmbH)
 *
 * Botan is released under the Simplified BSD License (see license.txt)
@@ -333,4 +333,25 @@ std::string replace_char(const std::string& str, char from_char, char to_char)
    return out;
    }
 
+bool host_wildcard_match(const std::string& issued, const std::string& host)
+   {
+   if(issued == host)
+      return true;
+
+   if(issued.size() > 2 && issued[0] == '*' && issued[1] == '.')
+      {
+      size_t host_i = host.find('.');
+      if(host_i == std::string::npos || host_i == host.size() - 1)
+         return false;
+
+      const std::string host_base = host.substr(host_i + 1);
+      const std::string issued_base = issued.substr(2);
+
+      if(host_base == issued_base)
+         return true;
+         }
+
+   return false;
+   }
+
 }
diff --git a/src/lib/utils/parsing.h b/src/lib/utils/parsing.h
index 25416d43a..db8db198e 100644
--- a/src/lib/utils/parsing.h
+++ b/src/lib/utils/parsing.h
@@ -128,6 +128,8 @@ std::map<std::string, std::string> BOTAN_DLL read_cfg(std::istream& is);
 
 std::string BOTAN_DLL clean_ws(const std::string& s);
 
+bool BOTAN_DLL host_wildcard_match(const std::string& wildcard, const std::string& host);
+
 
 }
 
diff --git a/src/scripts/dist.py b/src/scripts/dist.py
index c0819e2ef..224f01395 100755
--- a/src/scripts/dist.py
+++ b/src/scripts/dist.py
@@ -42,8 +42,15 @@ def run_git(args):
     proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     return check_subprocess_results(proc, 'git')
 
+def maybe_gpg(val):
+    # TODO: verify signatures
+    if 'BEGIN PGP SIGNATURE' in val:
+        return val.split('\n')[-2]
+    else:
+        return val.strip()
+
 def datestamp(tag):
-    ts = run_git(['show', '--no-patch', '--format=%ai', tag])
+    ts = maybe_gpg(run_git(['show', '--no-patch', '--format=%ai', tag]))
 
     ts_matcher = re.compile('^(\d{4})-(\d{2})-(\d{2}) \d{2}:\d{2}:\d{2} .*')
     match = ts_matcher.match(ts)
@@ -55,7 +62,7 @@ def datestamp(tag):
     return int(match.group(1) + match.group(2) + match.group(3))
 
 def revision_of(tag):
-    return run_git(['show', '--no-patch', '--format=%H', tag]).strip()
+    return maybe_gpg(run_git(['show', '--no-patch', '--format=%H', tag]))
 
 def extract_revision(revision, to):
     tar_val = run_git(['archive', '--format=tar', '--prefix=%s/' % (to), revision])
@@ -186,15 +193,17 @@ def main(args = None):
         else:
             return 'Botan-' + args[0]
 
-    logging.info('Creating release for version %s' % (target_version))
-
     rev_id = revision_of(target_version)
-    rel_date = datestamp(target_version)
 
     if rev_id == '':
         logging.error('No tag matching %s found' % (target_version))
         return 2
 
+    rel_date = datestamp(target_version)
+    if rel_date == 0:
+        logging.error('No date found for version')
+        return 2
+
     logging.info('Found %s at revision id %s released %d' % (target_version, rev_id, rel_date))
 
     output_basename = output_name(args)
diff --git a/src/tests/data/x509test/InvalidExtendedKeyUsage.pem b/src/tests/data/x509test/InvalidExtendedKeyUsage.pem
new file mode 100644
index 000000000..1077d478f
--- /dev/null
+++ b/src/tests/data/x509test/InvalidExtendedKeyUsage.pem
@@ -0,0 +1,39 @@
+-----BEGIN CERTIFICATE-----
+MIIDNTCCAp6gAwIBAgICBTYwDQYJKoZIhvcNAQEFBQAwgcQxCzAJBgNVBAYTAlVT
+MQswCQYDVQQIDAJDQTEYMBYGA1UEBwwPU2FuIEx1aXMgT2Jpc3BvMS4wLAYDVQQK
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+MDE2MjAyNVoXDTE2MTAyMTE2MjAyNVowgcAxCzAJBgNVBAYTAlVTMQswCQYDVQQI
+DAJDQTEYMBYGA1UEBwwPU2FuIEx1aXMgT2Jpc3BvMS4wLAYDVQQKDCVDZXJ0aWZp
+Y2F0ZSBWYWxpZGF0aW9uIGFuZCBDb21wbGlhbmNlMSIwIAYDVQQLDBlYNTA5IFZl
+cmlmaWNhdGlvbiBDaGVja2VyMRUwEwYDVQQDDAx3d3cudGxzLnRlc3QxHzAdBgkq
+hkiG9w0BCQEWEHNvbWVvbmVAbWFpbC5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0A
+MIGJAoGBAOVehzMzeL21cKiXqT7azmOk3yTNoRT4ZZIVcPiaSTKX7m+1e26KvDi+
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+MDQGA1UdJQEB/wQqMCgGCCsGAQUFBwMIBggrBgEFBQcDBAYIKwYBBQUHAwIGCCsG
+AQUFBwMDMA0GCSqGSIb3DQEBBQUAA4GBAGIOqLpfp3UtxxXF9tEEycMZnNze+NKb
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+bK9QDOU+O6hQ
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIDFDCCAn2gAwIBAgICA+kwDQYJKoZIhvcNAQEFBQAwgcQxCzAJBgNVBAYTAlVT
+MQswCQYDVQQIDAJDQTEYMBYGA1UEBwwPU2FuIEx1aXMgT2Jpc3BvMS4wLAYDVQQK
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+oxMwETAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBBQUAA4GBALqNB/JaqkTX
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+dRcxFarWaAJVGhJ+p6kWJt7XJnK341bP
+-----END CERTIFICATE-----
diff --git a/src/tests/data/x509test/InvalidIntCAFlag.pem b/src/tests/data/x509test/InvalidIntCAFlag.pem
new file mode 100644
index 000000000..bf8eadbb4
--- /dev/null
+++ b/src/tests/data/x509test/InvalidIntCAFlag.pem
@@ -0,0 +1,97 @@
+-----BEGIN CERTIFICATE-----
+MIIDADCCAmmgAwIBAgICBVMwDQYJKoZIhvcNAQEFBQAwgckxCzAJBgNVBAYTAlVT
+MQswCQYDVQQIDAJDQTEYMBYGA1UEBwwPU2FuIEx1aXMgT2Jpc3BvMS4wLAYDVQQK
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+QAkUqA==
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIDLjCCApegAwIBAgICBVIwDQYJKoZIhvcNAQEFBQAwgckxCzAJBgNVBAYTAlVT
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+UDE=
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+-----BEGIN CERTIFICATE-----
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new file mode 100644
index 000000000..135b25929
--- /dev/null
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new file mode 100644
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new file mode 100644
index 000000000..9cc79586d
--- /dev/null
+++ b/src/tests/data/x509test/InvalidNameConstraintExclude.pem
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new file mode 100644
index 000000000..3aece322f
--- /dev/null
+++ b/src/tests/data/x509test/InvalidNameConstraintPermit.pem
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index 000000000..00da5076a
--- /dev/null
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index 000000000..fedfe2893
--- /dev/null
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--- /dev/null
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new file mode 100644
index 000000000..4e18b4bdf
--- /dev/null
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--- /dev/null
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index 000000000..e86d22825
--- /dev/null
+++ b/src/tests/data/x509test/InvalidSelfSign.pem
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index 000000000..b1bd6c1af
--- /dev/null
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diff --git a/src/tests/data/x509test/InvalidWildcardMidMixed.pem b/src/tests/data/x509test/InvalidWildcardMidMixed.pem
new file mode 100644
index 000000000..82c554554
--- /dev/null
+++ b/src/tests/data/x509test/InvalidWildcardMidMixed.pem
@@ -0,0 +1,37 @@
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new file mode 100644
index 000000000..3e3c4fdd8
--- /dev/null
+++ b/src/tests/data/x509test/InvalidWildcardMidMixedAltName.pem
@@ -0,0 +1,38 @@
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diff --git a/src/tests/data/x509test/InvalidWildcardSingle.pem b/src/tests/data/x509test/InvalidWildcardSingle.pem
new file mode 100644
index 000000000..ef6992c09
--- /dev/null
+++ b/src/tests/data/x509test/InvalidWildcardSingle.pem
@@ -0,0 +1,37 @@
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new file mode 100644
index 000000000..2c4157cc5
--- /dev/null
+++ b/src/tests/data/x509test/InvalidWildcardSingleAltName.pem
@@ -0,0 +1,38 @@
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diff --git a/src/tests/data/x509test/MissingIntCABasicConstraintWithCertSign.pem b/src/tests/data/x509test/MissingIntCABasicConstraintWithCertSign.pem
new file mode 100644
index 000000000..7ed001ef8
--- /dev/null
+++ b/src/tests/data/x509test/MissingIntCABasicConstraintWithCertSign.pem
@@ -0,0 +1,97 @@
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new file mode 100644
index 000000000..5ac372128
--- /dev/null
+++ b/src/tests/data/x509test/ValidAltName.pem
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index 000000000..204789966
--- /dev/null
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new file mode 100644
index 000000000..a7248de4c
--- /dev/null
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new file mode 100644
index 000000000..68e6cf91c
--- /dev/null
+++ b/src/tests/data/x509test/ValidIntCALen.pem
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new file mode 100644
index 000000000..80e38c6f4
--- /dev/null
+++ b/src/tests/data/x509test/ValidWildcard.pem
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+MIIC+TCCAmKgAwIBAgICBZEwDQYJKoZIhvcNAQEFBQAwgcQxCzAJBgNVBAYTAlVT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-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/src/tests/data/x509test/expected.txt b/src/tests/data/x509test/expected.txt
new file mode 100644
index 000000000..67e2937eb
--- /dev/null
+++ b/src/tests/data/x509test/expected.txt
@@ -0,0 +1,43 @@
+InvalidExtendedKeyUsage.pem:Invalid usage
+InvalidIntCAFlag.pem:CA certificate not allowed to issue certs
+InvalidIntCAKeyUsage.pem:CA certificate not allowed to issue certs
+InvalidIntCALen.pem:Certificate chain too long
+InvalidIntCALoop.pem:Loop in certificate chain
+InvalidIntCASelfSign.pem:Cannot establish trust
+InvalidIntCAVersionOne.pem:CA certificate not allowed to issue certs
+InvalidIntCAVersionTwo.pem:CA certificate not allowed to issue certs
+InvalidKeyUsage.pem:Invalid usage
+InvalidName.pem:Certificate does not match provided name
+InvalidNameAltName.pem:Certificate does not match provided name
+InvalidNameAltNameWithSubj.pem:Certificate does not match provided name
+InvalidNotAfter.pem:Certificate has expired
+InvalidNotAfterChained.pem:Certificate has expired
+InvalidSelfSign.pem:Cannot establish trust
+InvalidWildcardAll.pem:Certificate does not match provided name
+InvalidWildcardAllAltName.pem:Certificate does not match provided name
+InvalidWildcardLeft.pem:Certificate does not match provided name
+InvalidWildcardLeftAltName.pem:Certificate does not match provided name
+InvalidWildcardMid.pem:Certificate does not match provided name
+InvalidWildcardMidAltName.pem:Certificate does not match provided name
+InvalidWildcardMidMixed.pem:Certificate does not match provided name
+InvalidWildcardMidMixedAltName.pem:Certificate does not match provided name
+InvalidWildcardSingle.pem:Certificate does not match provided name
+InvalidWildcardSingleAltName.pem:Certificate does not match provided name
+MissingIntCABasicConstraintWithCertSign.pem:CA certificate not allowed to issue certs
+MissingIntCAExtensions.pem:CA certificate not allowed to issue certs
+ValidAltName.pem:Verified
+ValidCert.pem:Verified
+ValidChained.pem:Verified
+ValidIntCALen.pem:Verified
+ValidWildcard.pem:Verified
+
+# Need to fix date settings in x509test and regen
+#InvalidNotBefore.pem:Certificate is not yet valid
+#InvalidNotBeforeChained.pem:Certificate is not yet valid
+
+# Missing name constraints
+InvalidNameConstraintExclude.pem:Certificate issuer not found
+InvalidNameConstraintPermit.pem:Certificate issuer not found
+InvalidNameConstraintPermitRight.pem:Certificate issuer not found
+InvalidNameConstraintPermitThenExclude.pem:Certificate issuer not found
+ValidNameConstraint.pem:Certificate issuer not found
diff --git a/src/tests/data/x509test/root.pem b/src/tests/data/x509test/root.pem
new file mode 100644
index 000000000..b6b894a04
--- /dev/null
+++ b/src/tests/data/x509test/root.pem
@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/src/tests/nist_x509.cpp b/src/tests/nist_x509.cpp
index 04b569d32..65e154293 100644
--- a/src/tests/nist_x509.cpp
+++ b/src/tests/nist_x509.cpp
@@ -1,16 +1,7 @@
 /*
-* (C) 2006,2011,2012,2014 Jack Lloyd
+* (C) 2006,2011,2012,2014,2015 Jack Lloyd
 *
 * Botan is released under the Simplified BSD License (see license.txt)
-*
-* Code to run the X.509v3 processing tests described in "Conformance
-*  Testing of Relying Party Client Certificate Path Proccessing Logic",
-*  which is available on NIST's web site.
-*
-* Known Failures/Problems:
-*  - Policy extensions are not implemented, so we skip tests #34-#53.
-*  - Tests #75 and #76 are skipped as they make use of relatively
-*    obscure CRL extensions which are not supported.
 */
 
 #include "tests.h"
@@ -22,6 +13,7 @@
 
 #include <algorithm>
 #include <iostream>
+#include <fstream>
 #include <iomanip>
 #include <string>
 #include <vector>
@@ -32,11 +24,110 @@ using namespace Botan;
 
 std::map<size_t, Path_Validation_Result::Code> get_expected();
 
+namespace {
+
+std::vector<X509_Certificate> load_cert_file(const std::string& filename)
+   {
+   DataSource_Stream in(filename);
+
+   std::vector<X509_Certificate> certs;
+   while(!in.end_of_data())
+      {
+      try {
+      certs.emplace_back(in);
+      }
+      catch(Decoding_Error) {}
+      }
+
+   return certs;
+   }
+
+std::map<std::string, std::string> read_results(const std::string& results_file)
+   {
+   std::ifstream in(results_file);
+   if(!in.good())
+      throw std::runtime_error("Failed reading " + results_file);
+
+   std::map<std::string, std::string> m;
+   std::string line;
+   while(in.good())
+      {
+      std::getline(in, line);
+      if(line == "")
+         continue;
+      if(line[0] == '#')
+         continue;
+
+      std::vector<std::string> parts = split_on(line, ':');
+
+      if(parts.size() != 2)
+         throw std::runtime_error("Invalid line " + line);
+
+      m[parts[0]] = parts[1];
+      }
+
+   return m;
+   }
+
+}
+
+size_t test_x509_x509test()
+   {
+   // Test certs generated by https://github.com/yymax/x509test
+   const std::string test_dir = "src/tests/data/x509test";
+
+   std::map<std::string, std::string> results = read_results(test_dir + "/expected.txt");
+
+   const Path_Validation_Restrictions default_restrictions;
+
+   size_t fail = 0;
+
+   X509_Certificate root(test_dir + "/root.pem");
+   Certificate_Store_In_Memory trusted;
+   trusted.add_certificate(root);
+
+   for(auto i = results.begin(); i != results.end(); ++i)
+      {
+      const std::string fsname = i->first;
+      const std::string expected = i->second;
+
+      std::vector<X509_Certificate> certs = load_cert_file(test_dir + "/" + fsname);
+
+      if(certs.empty())
+         throw std::runtime_error("Failed to read certs from " + fsname);
+
+      Path_Validation_Result result = x509_path_validate(certs, default_restrictions, trusted,
+                                                         "www.tls.test", Usage_Type::TLS_SERVER_AUTH);
+
+      if(result.successful_validation() && result.trust_root() != root)
+         result = Path_Validation_Result(Certificate_Status_Code::CANNOT_ESTABLISH_TRUST);
+
+      if(result.result_string() != expected)
+         {
+         std::cout << "FAIL " << fsname << " expected '" << expected << "' got '" << result.result_string() << "'\n";
+         ++fail;
+         }
+      }
+
+   test_report("X.509 (x509test)", results.size(), fail);
+
+   return fail;
+   }
+
 size_t test_nist_x509()
    {
+   /**
+   * Code to run the X.509v3 processing tests described in "Conformance
+   *  Testing of Relying Party Client Certificate Path Proccessing Logic",
+   *  which is available on NIST's web site.
+   *
+   * Known Failures/Problems:
+   *  - Policy extensions are not implemented, so we skip tests #34-#53.
+   *  - Tests #75 and #76 are skipped as they make use of relatively
+   *    obscure CRL extensions which are not supported.
+   */
    const std::string root_test_dir = "src/tests/data/nist_x509/";
    const size_t total_tests = 76;
-
    try
       {
       // Do nothing, just test filesystem access
@@ -61,8 +152,8 @@ size_t test_nist_x509()
    for(size_t test_no = 1; test_no <= total_tests; ++test_no)
       {
       const std::string test_dir = root_test_dir + "/test" + (test_no <= 9 ? "0" : "") + std::to_string(test_no);
-      
-      const std::vector<std::string> all_files = get_files_recursive(test_dir);    
+
+      const std::vector<std::string> all_files = get_files_recursive(test_dir);
       if (all_files.empty())
          std::cout << "Warning: No test files found in '" << test_dir << "'" << std::endl;
 
@@ -83,6 +174,7 @@ size_t test_nist_x509()
 
       if(expected_results.find(test_no) == expected_results.end())
          {
+         //printf("Skipping %d\n", test_no);
          skipped++;
          continue;
          }
@@ -284,6 +376,7 @@ std::map<size_t, Path_Validation_Result::Code> get_expected()
 
 #else
 
+size_t test_x509_x509test() { return 0; }
 size_t test_nist_x509() { return 0; }
 
 #endif
diff --git a/src/tests/tests.cpp b/src/tests/tests.cpp
index d213b6a3a..61378b1a2 100644
--- a/src/tests/tests.cpp
+++ b/src/tests/tests.cpp
@@ -38,10 +38,10 @@ size_t run_tests_in_dir(const std::string& dir, std::function<size_t (const std:
    try
       {
       auto files = get_files_recursive(dir);
-      
+
       if (files.empty())
          std::cout << "Warning: No test files found in '" << dir << "'" << std::endl;
-      
+
       for(const auto file: files)
          fails += fn(file);
       }
@@ -312,6 +312,7 @@ int main(int argc, char* argv[])
    DEF_TEST(pk_keygen);
    DEF_TEST(cvc);
    DEF_TEST(x509);
+   DEF_TEST(x509_x509test);
    DEF_TEST(nist_x509);
    DEF_TEST(tls);
    DEF_TEST(compression);
diff --git a/src/tests/tests.h b/src/tests/tests.h
index 6d6a2d34c..1e496ccb2 100644
--- a/src/tests/tests.h
+++ b/src/tests/tests.h
@@ -165,6 +165,7 @@ size_t test_ecdsa_unit();
 size_t test_ecdh_unit();
 
 size_t test_x509();
+size_t test_x509_x509test();
 size_t test_cvc();
 
 size_t test_tls();
diff --git a/src/tests/unit_tls.cpp b/src/tests/unit_tls.cpp
index 116eb2cdf..d4abef119 100644
--- a/src/tests/unit_tls.cpp
+++ b/src/tests/unit_tls.cpp
@@ -11,6 +11,7 @@
 
 #include <botan/tls_server.h>
 #include <botan/tls_client.h>
+#include <botan/tls_handshake_msg.h>
 #include <botan/pkcs10.h>
 #include <botan/x509self.h>
 #include <botan/rsa.h>
@@ -21,6 +22,7 @@
 #include <iostream>
 #include <vector>
 #include <memory>
+#include <thread>
 
 using namespace Botan;
 
@@ -155,158 +157,441 @@ Credentials_Manager* create_creds()
    return new Credentials_Manager_Test(server_cert, ca_cert, server_key);
    }
 
-size_t basic_test_handshake(RandomNumberGenerator& rng,
-                            TLS::Protocol_Version offer_version,
-                            Credentials_Manager& creds,
-                            TLS::Policy& policy)
+std::function<void (const byte[], size_t)> queue_inserter(std::vector<byte>& q)
    {
-   TLS::Session_Manager_In_Memory server_sessions(rng);
-   TLS::Session_Manager_In_Memory client_sessions(rng);
-
-   std::vector<byte> c2s_q, s2c_q, c2s_data, s2c_data;
+   return [&](const byte buf[], size_t sz) { q.insert(q.end(), buf, buf + sz); };
+   }
 
-   auto handshake_complete = [&](const TLS::Session& session) -> bool
+void print_alert(TLS::Alert alert, const byte[], size_t)
    {
-      if(session.version() != offer_version)
-         std::cout << "Offered " << offer_version.to_string()
-                   << " got " << session.version().to_string() << std::endl;
-      return true;
+   //std::cout << "Alert " << alert.type_string() << std::endl;
    };
 
-   auto print_alert = [&](TLS::Alert alert, const byte[], size_t)
+void mutate(std::vector<byte>& v, RandomNumberGenerator& rng)
    {
-      if(alert.is_valid())
-         std::cout << "Server recvd alert " << alert.type_string() << std::endl;
-   };
+   if(v.empty())
+      return;
 
-   auto save_server_data = [&](const byte buf[], size_t sz)
-   {
-      c2s_data.insert(c2s_data.end(), buf, buf+sz);
-   };
+   size_t voff = rng.get_random<size_t>() % v.size();
+   v[voff] ^= rng.next_nonzero_byte();
+ }
 
-   auto save_client_data = [&](const byte buf[], size_t sz)
+size_t test_tls_handshake(RandomNumberGenerator& rng,
+                          TLS::Protocol_Version offer_version,
+                          Credentials_Manager& creds,
+                          TLS::Policy& policy)
    {
-      s2c_data.insert(s2c_data.end(), buf, buf+sz);
-   };
+   TLS::Session_Manager_In_Memory server_sessions(rng);
+   TLS::Session_Manager_In_Memory client_sessions(rng);
 
-   auto next_protocol_chooser = [&](std::vector<std::string> protos) {
-      if(protos.size() != 2)
-         std::cout << "Bad protocol size" << std::endl;
-      if(protos[0] != "test/1" || protos[1] != "test/2")
-         std::cout << "Bad protocol values" << std::endl;
-      return "test/3";
-   };
-   const std::vector<std::string> protocols_offered = { "test/1", "test/2" };
-
-   TLS::Server server([&](const byte buf[], size_t sz)
-                      { s2c_q.insert(s2c_q.end(), buf, buf+sz); },
-                      save_server_data,
-                      print_alert,
-                      handshake_complete,
-                      server_sessions,
-                      creds,
-                      policy,
-                      rng,
-                      next_protocol_chooser,
-                      offer_version.is_datagram_protocol());
-
-   TLS::Client client([&](const byte buf[], size_t sz)
-                      { c2s_q.insert(c2s_q.end(), buf, buf+sz); },
-                      save_client_data,
-                      print_alert,
-                      handshake_complete,
-                      client_sessions,
-                      creds,
-                      policy,
-                      rng,
-                      TLS::Server_Information("server.example.com"),
-                      offer_version,
-                      protocols_offered);
-
-   while(true)
+   for(size_t r = 1; r <= 4; ++r)
       {
-      if(client.is_closed() && server.is_closed())
-         break;
+      //std::cout << offer_version.to_string() << " r " << r << "\n";
 
-      if(client.is_active())
-         client.send("1");
-      if(server.is_active())
-         {
-         if(server.next_protocol() != "test/3")
-            std::cout << "Wrong protocol " << server.next_protocol() << std::endl;
-         server.send("2");
-         }
+      bool handshake_done = false;
 
-      /*
-      * Use this as a temp value to hold the queues as otherwise they
-      * might end up appending more in response to messages during the
-      * handshake.
-      */
-      std::vector<byte> input;
-      std::swap(c2s_q, input);
+      auto handshake_complete = [&](const TLS::Session& session) -> bool {
+         handshake_done = true;
 
-      try
-         {
-         server.received_data(input.data(), input.size());
-         }
-      catch(std::exception& e)
-         {
-         std::cout << "Server error - " << e.what() << std::endl;
-         return 1;
-         }
+         /*
+         std::cout << "Session established " << session.version().to_string() << " "
+                   << session.ciphersuite().to_string() << " " << hex_encode(session.session_id()) << "\n";
+         */
+
+         if(session.version() != offer_version)
+            std::cout << "Offered " << offer_version.to_string()
+                      << " got " << session.version().to_string() << std::endl;
+         return true;
+         };
 
-      input.clear();
-      std::swap(s2c_q, input);
+      auto next_protocol_chooser = [&](std::vector<std::string> protos) {
+         if(protos.size() != 2)
+            std::cout << "Bad protocol size" << std::endl;
+         if(protos[0] != "test/1" || protos[1] != "test/2")
+            std::cout << "Bad protocol values" << std::endl;
+         return "test/3";
+      };
+
+      const std::vector<std::string> protocols_offered = { "test/1", "test/2" };
 
       try
          {
-         client.received_data(input.data(), input.size());
+         std::vector<byte> c2s_traffic, s2c_traffic, client_recv, server_recv, client_sent, server_sent;
+
+         TLS::Server server(queue_inserter(s2c_traffic),
+                            queue_inserter(server_recv),
+                            print_alert,
+                            handshake_complete,
+                            server_sessions,
+                            creds,
+                            policy,
+                            rng,
+                            next_protocol_chooser,
+                            false);
+
+         TLS::Client client(queue_inserter(c2s_traffic),
+                            queue_inserter(client_recv),
+                            print_alert,
+                            handshake_complete,
+                            client_sessions,
+                            creds,
+                            policy,
+                            rng,
+                            TLS::Server_Information("server.example.com"),
+                            offer_version,
+                            protocols_offered);
+
+         size_t rounds = 0;
+
+         while(true)
+            {
+            ++rounds;
+
+            if(rounds > 25)
+               {
+               std::cout << "Still here, something went wrong\n";
+               return 1;
+               }
+
+            if(handshake_done && (client.is_closed() || server.is_closed()))
+               break;
+
+            if(client.is_active() && client_sent.empty())
+               {
+               // Choose a len between 1 and 511
+               const size_t c_len = 1 + rng.next_byte() + rng.next_byte();
+               client_sent = unlock(rng.random_vec(c_len));
+
+               // TODO send in several records
+               client.send(client_sent);
+               }
+
+            if(server.is_active() && server_sent.empty())
+               {
+               if(server.next_protocol() != "test/3")
+                  std::cout << "Wrong protocol " << server.next_protocol() << std::endl;
+
+               const size_t s_len = 1 + rng.next_byte() + rng.next_byte();
+               server_sent = unlock(rng.random_vec(s_len));
+               server.send(server_sent);
+               }
+
+            const bool corrupt_client_data = (r == 3 && c2s_traffic.size() && rng.next_byte() % 3 == 0 && rounds > 1);
+            const bool corrupt_server_data = (r == 4 && s2c_traffic.size() && rng.next_byte() % 3 == 0 && rounds > 1);
+
+            try
+               {
+               /*
+               * Use this as a temp value to hold the queues as otherwise they
+               * might end up appending more in response to messages during the
+               * handshake.
+               */
+               //std::cout << "server recv " << c2s_traffic.size() << " bytes\n";
+               std::vector<byte> input;
+               std::swap(c2s_traffic, input);
+
+               if(corrupt_server_data)
+                  {
+                  //std::cout << "Corrupting server data\n";
+                  mutate(input, rng);
+                  }
+               server.received_data(input.data(), input.size());
+               }
+            catch(std::exception& e)
+               {
+               std::cout << "Server error - " << e.what() << std::endl;
+               continue;
+               }
+
+            try
+               {
+               //std::cout << "client recv " << s2c_traffic.size() << " bytes\n";
+               std::vector<byte> input;
+               std::swap(s2c_traffic, input);
+               if(corrupt_client_data)
+                  {
+                  //std::cout << "Corrupting client data\n";
+                  mutate(input, rng);
+                  }
+
+               client.received_data(input.data(), input.size());
+               }
+            catch(std::exception& e)
+               {
+               std::cout << "Client error - " << e.what() << std::endl;
+               continue;
+               }
+
+            if(client_recv.size())
+               {
+               if(client_recv != server_sent)
+                  {
+                  std::cout << "Error in client recv" << std::endl;
+                  return 1;
+                  }
+               }
+
+            if(server_recv.size())
+               {
+               if(server_recv != client_sent)
+                  {
+                  std::cout << "Error in server recv" << std::endl;
+                  return 1;
+                  }
+               }
+
+            if(client.is_closed() && server.is_closed())
+               break;
+
+            if(server_recv.size() && client_recv.size())
+               {
+               SymmetricKey client_key = client.key_material_export("label", "context", 32);
+               SymmetricKey server_key = server.key_material_export("label", "context", 32);
+
+               if(client_key != server_key)
+                  {
+                  std::cout << "TLS key material export mismatch: "
+                            << client_key.as_string() << " != "
+                            << server_key.as_string() << "\n";
+                  return 1;
+                  }
+
+               if(r % 2 == 0)
+                  client.close();
+               else
+                  server.close();
+               }
+            }
          }
       catch(std::exception& e)
          {
-         std::cout << "Client error - " << e.what() << std::endl;
+         std::cout << e.what() << "\n";
          return 1;
          }
+      }
 
-      if(c2s_data.size())
-         {
-         if(c2s_data[0] != '1')
-            {
-            std::cout << "Error" << std::endl;
-            return 1;
-            }
-         }
+   return 0;
+   }
+
+size_t test_dtls_handshake(RandomNumberGenerator& rng,
+                            TLS::Protocol_Version offer_version,
+                            Credentials_Manager& creds,
+                            TLS::Policy& policy)
+   {
+   BOTAN_ASSERT(offer_version.is_datagram_protocol(), "Test is for datagram version");
+
+   TLS::Session_Manager_In_Memory server_sessions(rng);
+   TLS::Session_Manager_In_Memory client_sessions(rng);
+
+   for(size_t r = 1; r <= 2; ++r)
+      {
+      //std::cout << offer_version.to_string() << " round " << r << "\n";
+
+      bool handshake_done = false;
+
+      auto handshake_complete = [&](const TLS::Session& session) -> bool {
+         handshake_done = true;
 
-      if(s2c_data.size())
+         /*
+         std::cout << "Session established " << session.version().to_string() << " "
+                   << session.ciphersuite().to_string() << " " << hex_encode(session.session_id()) << "\n";
+         */
+
+         if(session.version() != offer_version)
+            std::cout << "Offered " << offer_version.to_string()
+                      << " got " << session.version().to_string() << std::endl;
+         return true;
+         };
+
+      auto next_protocol_chooser = [&](std::vector<std::string> protos) {
+         if(protos.size() != 2)
+            std::cout << "Bad protocol size" << std::endl;
+         if(protos[0] != "test/1" || protos[1] != "test/2")
+            std::cout << "Bad protocol values" << std::endl;
+         return "test/3";
+      };
+
+      const std::vector<std::string> protocols_offered = { "test/1", "test/2" };
+
+      try
          {
-         if(s2c_data[0] != '2')
+         std::vector<byte> c2s_traffic, s2c_traffic, client_recv, server_recv, client_sent, server_sent;
+
+         TLS::Server server(queue_inserter(s2c_traffic),
+                            queue_inserter(server_recv),
+                            print_alert,
+                            handshake_complete,
+                            server_sessions,
+                            creds,
+                            policy,
+                            rng,
+                            next_protocol_chooser,
+                            true);
+
+         TLS::Client client(queue_inserter(c2s_traffic),
+                            queue_inserter(client_recv),
+                            print_alert,
+                            handshake_complete,
+                            client_sessions,
+                            creds,
+                            policy,
+                            rng,
+                            TLS::Server_Information("server.example.com"),
+                            offer_version,
+                            protocols_offered);
+
+         size_t rounds = 0;
+
+         while(true)
             {
-            std::cout << "Error" << std::endl;
-            return 1;
-            }
-         }
+            // TODO: client and server should be in different threads
+            std::this_thread::sleep_for(std::chrono::milliseconds(rng.next_byte() % 2));
+            ++rounds;
 
-      if(s2c_data.size() && c2s_data.size())
-         {
-         SymmetricKey client_key = client.key_material_export("label", "context", 32);
-         SymmetricKey server_key = server.key_material_export("label", "context", 32);
+            if(rounds > 100)
+               {
+               std::cout << "Still here, something went wrong\n";
+               return 1;
+               }
+
+            if(handshake_done && (client.is_closed() || server.is_closed()))
+               break;
+
+            if(client.is_active() && client_sent.empty())
+               {
+               // Choose a len between 1 and 511 and send random chunks:
+               const size_t c_len = 1 + rng.next_byte() + rng.next_byte();
+               client_sent = unlock(rng.random_vec(c_len));
+
+               // TODO send multiple parts
+               //std::cout << "Sending " << client_sent.size() << " bytes to server\n";
+               client.send(client_sent);
+               }
 
-         if(client_key != server_key)
-            return 1;
+            if(server.is_active() && server_sent.empty())
+               {
+               if(server.next_protocol() != "test/3")
+                  std::cout << "Wrong protocol " << server.next_protocol() << std::endl;
+
+               const size_t s_len = 1 + rng.next_byte() + rng.next_byte();
+               server_sent = unlock(rng.random_vec(s_len));
+               //std::cout << "Sending " << server_sent.size() << " bytes to client\n";
+               server.send(server_sent);
+               }
+
+            const bool corrupt_client_data = (r == 3 && c2s_traffic.size() && rng.next_byte() % 3 == 0 && rounds < 10);
+            const bool corrupt_server_data = (r == 4 && s2c_traffic.size() && rng.next_byte() % 3 == 0 && rounds < 10);
+
+            try
+               {
+               /*
+               * Use this as a temp value to hold the queues as otherwise they
+               * might end up appending more in response to messages during the
+               * handshake.
+               */
+               //std::cout << "server got " << c2s_traffic.size() << " bytes\n";
+               std::vector<byte> input;
+               std::swap(c2s_traffic, input);
+
+               if(corrupt_client_data)
+                  {
+                  //std::cout << "Corrupting client data\n";
+                  mutate(input, rng);
+                  }
+
+               server.received_data(input.data(), input.size());
+               }
+            catch(std::exception& e)
+               {
+               std::cout << "Server error - " << e.what() << std::endl;
+               continue;
+               }
+
+            try
+               {
+               //std::cout << "client got " << s2c_traffic.size() << " bytes\n";
+               std::vector<byte> input;
+               std::swap(s2c_traffic, input);
+
+               if(corrupt_server_data)
+                  {
+                  //std::cout << "Corrupting server data\n";
+                  mutate(input, rng);
+                  }
+               client.received_data(input.data(), input.size());
+               }
+            catch(std::exception& e)
+               {
+               std::cout << "Client error - " << e.what() << std::endl;
+               continue;
+               }
 
-         server.close();
-         client.close();
+            // If we corrupted a DTLS application message, resend it:
+            if(client.is_active() && corrupt_client_data && server_recv.empty())
+               client.send(client_sent);
+            if(server.is_active() && corrupt_server_data && client_recv.empty())
+               server.send(server_sent);
+
+            if(client_recv.size())
+               {
+               if(client_recv != server_sent)
+                  {
+                  std::cout << "Error in client recv" << std::endl;
+                  return 1;
+                  }
+               }
+
+            if(server_recv.size())
+               {
+               if(server_recv != client_sent)
+                  {
+                  std::cout << "Error in server recv" << std::endl;
+                  return 1;
+                  }
+               }
+
+            if(client.is_closed() && server.is_closed())
+               break;
+
+            if(server_recv.size() && client_recv.size())
+               {
+               SymmetricKey client_key = client.key_material_export("label", "context", 32);
+               SymmetricKey server_key = server.key_material_export("label", "context", 32);
+
+               if(client_key != server_key)
+                  {
+                  std::cout << "TLS key material export mismatch: "
+                            << client_key.as_string() << " != "
+                            << server_key.as_string() << "\n";
+                  return 1;
+                  }
+
+               if(r % 2 == 0)
+                  client.close();
+               else
+                  server.close();
+               }
+            }
+         }
+      catch(std::exception& e)
+         {
+         std::cout << e.what() << "\n";
+         return 1;
          }
       }
 
    return 0;
    }
 
-class Test_Policy : public TLS::Policy
+class Test_Policy : public TLS::Text_Policy
    {
    public:
+      Test_Policy() : Text_Policy("") {}
       bool acceptable_protocol_version(TLS::Protocol_Version) const override { return true; }
       bool send_fallback_scsv(TLS::Protocol_Version) const override { return false; }
+
+      size_t dtls_initial_timeout() const override { return 1; }
+      size_t dtls_maximum_timeout() const override { return 8; }
    };
 
 }
@@ -315,17 +600,43 @@ size_t test_tls()
    {
    size_t errors = 0;
 
-   Test_Policy default_policy;
    auto& rng = test_rng();
    std::unique_ptr<Credentials_Manager> basic_creds(create_creds());
 
-   errors += basic_test_handshake(rng, TLS::Protocol_Version::TLS_V10, *basic_creds, default_policy);
-   errors += basic_test_handshake(rng, TLS::Protocol_Version::TLS_V11, *basic_creds, default_policy);
-   errors += basic_test_handshake(rng, TLS::Protocol_Version::TLS_V12, *basic_creds, default_policy);
-   errors += basic_test_handshake(rng, TLS::Protocol_Version::DTLS_V10, *basic_creds, default_policy);
-   errors += basic_test_handshake(rng, TLS::Protocol_Version::DTLS_V12, *basic_creds, default_policy);
-
-   test_report("TLS", 5, errors);
+   Test_Policy policy;
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V10, *basic_creds, policy);
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V11, *basic_creds, policy);
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V12, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V10, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V12, *basic_creds, policy);
+
+   policy.set("key_exchange_methods", "RSA");
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V10, *basic_creds, policy);
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V11, *basic_creds, policy);
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V12, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V10, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V12, *basic_creds, policy);
+
+   policy.set("key_exchange_methods", "DH");
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V10, *basic_creds, policy);
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V11, *basic_creds, policy);
+   policy.set("key_exchange_methods", "ECDH");
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V12, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V10, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V12, *basic_creds, policy);
+
+   policy.set("ciphers", "AES-128");
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V10, *basic_creds, policy);
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V11, *basic_creds, policy);
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V12, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V10, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V12, *basic_creds, policy);
+
+   policy.set("ciphers", "ChaCha20Poly1305");
+   errors += test_tls_handshake(rng, TLS::Protocol_Version::TLS_V12, *basic_creds, policy);
+   errors += test_dtls_handshake(rng, TLS::Protocol_Version::DTLS_V12, *basic_creds, policy);
+
+   test_report("TLS", 22, errors);
 
    return errors;
    }
author	Mouse <[email protected]>	2015-10-27 15:24:39 -0400
committer	Mouse <[email protected]>	2015-10-27 15:24:39 -0400
commit	a4966294751e503f97cfc3826308e43415c662c7 (patch)
tree	43f7b6f6f763a4b5627ce0e723465ce6fb3eca89 /src
parent	f6f0b152e6c46ad499eec2b8f3973a3a678f3008 (diff)
parent	a38d045acf208390b04c03f6473783e71be93168 (diff)