1 files changed, 118 insertions, 0 deletions
diff --git a/src/tls/msg_cert_verify.cpp b/src/tls/msg_cert_verify.cpp
new file mode 100644
index 000000000..7a58ea28a
--- /dev/null
+++ b/src/tls/msg_cert_verify.cpp
@@ -0,0 +1,118 @@
+/*
+* Certificate Verify Message
+* (C) 2004,2006,2011,2012 Jack Lloyd
+*
+* Released under the terms of the Botan license
+*/
+
+#include <botan/internal/tls_messages.h>
+#include <botan/internal/tls_reader.h>
+#include <botan/internal/tls_extensions.h>
+#include <botan/internal/tls_handshake_io.h>
+#include <botan/internal/assert.h>
+#include <memory>
+
+namespace Botan {
+
+namespace TLS {
+
+/*
+* Create a new Certificate Verify message
+*/
+Certificate_Verify::Certificate_Verify(Handshake_IO& io,
+                                       Handshake_State* state,
+                                       const Policy& policy,
+                                       RandomNumberGenerator& rng,
+                                       const Private_Key* priv_key)
+   {
+   BOTAN_ASSERT_NONNULL(priv_key);
+
+   std::pair<std::string, Signature_Format> format =
+      state->choose_sig_format(priv_key, hash_algo, sig_algo, true, policy);
+
+   PK_Signer signer(*priv_key, format.first, format.second);
+
+   if(state->version() == Protocol_Version::SSL_V3)
+      {
+      secure_vector<byte> md5_sha = state->hash.final_ssl3(
+         state->keys.master_secret());
+
+      if(priv_key->algo_name() == "DSA")
+         signature = signer.sign_message(&md5_sha[16], md5_sha.size()-16, rng);
+      else
+         signature = signer.sign_message(md5_sha, rng);
+      }
+   else
+      {
+      signature = signer.sign_message(state->hash.get_contents(), rng);
+      }
+
+   state->hash.update(io.send(*this));
+   }
+
+/*
+* Deserialize a Certificate Verify message
+*/
+Certificate_Verify::Certificate_Verify(const std::vector<byte>& buf,
+                                       Protocol_Version version)
+   {
+   TLS_Data_Reader reader(buf);
+
+   if(version.supports_negotiable_signature_algorithms())
+      {
+      hash_algo = Signature_Algorithms::hash_algo_name(reader.get_byte());
+      sig_algo = Signature_Algorithms::sig_algo_name(reader.get_byte());
+      }
+
+   signature = reader.get_range<byte>(2, 0, 65535);
+   }
+
+/*
+* Serialize a Certificate Verify message
+*/
+std::vector<byte> Certificate_Verify::serialize() const
+   {
+   std::vector<byte> buf;
+
+   if(hash_algo != "" && sig_algo != "")
+      {
+      buf.push_back(Signature_Algorithms::hash_algo_code(hash_algo));
+      buf.push_back(Signature_Algorithms::sig_algo_code(sig_algo));
+      }
+
+   const u16bit sig_len = signature.size();
+   buf.push_back(get_byte(0, sig_len));
+   buf.push_back(get_byte(1, sig_len));
+   buf += signature;
+
+   return buf;
+   }
+
+/*
+* Verify a Certificate Verify message
+*/
+bool Certificate_Verify::verify(const X509_Certificate& cert,
+                                Handshake_State* state)
+   {
+   std::unique_ptr<Public_Key> key(cert.subject_public_key());
+
+   std::pair<std::string, Signature_Format> format =
+      state->understand_sig_format(key.get(), hash_algo, sig_algo, true);
+
+   PK_Verifier verifier(*key, format.first, format.second);
+
+   if(state->version() == Protocol_Version::SSL_V3)
+      {
+      secure_vector<byte> md5_sha = state->hash.final_ssl3(
+         state->keys.master_secret());
+
+      return verifier.verify_message(&md5_sha[16], md5_sha.size()-16,
+                                     &signature[0], signature.size());
+      }
+
+   return verifier.verify_message(state->hash.get_contents(), signature);
+   }
+
+}
+
+}