From 446d572d4984fa1f62001a0db7ac65b1201cbf45 Mon Sep 17 00:00:00 2001
From: lloyd <lloyd@randombit.net>
Date: Sun, 27 May 2012 14:56:48 +0000
Subject: Initial ability to check the results.

---
 src/cert/ocsp/ocsp.cpp       | 47 ++++++++++++++++++++------------------------
 src/cert/ocsp/ocsp.h         |  9 +++++++++
 src/cert/ocsp/ocsp_types.cpp |  4 ++++
 3 files changed, 34 insertions(+), 26 deletions(-)

(limited to 'src/cert')

diff --git a/src/cert/ocsp/ocsp.cpp b/src/cert/ocsp/ocsp.cpp
index 35490876c..c08f09efb 100644
--- a/src/cert/ocsp/ocsp.cpp
+++ b/src/cert/ocsp/ocsp.cpp
@@ -48,20 +48,18 @@ std::vector<byte> Request::BER_encode() const
    {
    CertID certid(m_issuer, m_subject);
 
-   DER_Encoder der;
-
-   der.start_cons(SEQUENCE)
-      .start_cons(SEQUENCE)
-      .start_explicit(0)
-        .encode(static_cast<size_t>(0)) // version #
-      .end_explicit()
-      .start_cons(SEQUENCE);
-
-   der.start_cons(SEQUENCE).encode(certid).end_cons();
-
-   der.end_cons().end_cons().end_cons();
-
-   return der.get_contents_unlocked();
+   return DER_Encoder().start_cons(SEQUENCE)
+        .start_cons(SEQUENCE)
+          .start_explicit(0)
+            .encode(static_cast<size_t>(0)) // version #
+          .end_explicit()
+            .start_cons(SEQUENCE)
+              .start_cons(SEQUENCE)
+                .encode(certid)
+              .end_cons()
+            .end_cons()
+          .end_cons()
+      .end_cons().get_contents_unlocked();
    }
 
 std::string Request::base64_encode() const
@@ -78,7 +76,6 @@ Response::Response(const std::vector<byte>& response_bits)
    size_t resp_status = 0;
 
    response_outer.decode(resp_status, ENUMERATED, UNIVERSAL);
-   std::cout << resp_status << "\n";
 
    if(response_outer.more_items())
       {
@@ -94,7 +91,6 @@ Response::Response(const std::vector<byte>& response_bits)
       BER_Decoder basicresponse_x(response_vec);
 
       BER_Decoder basicresponse = basicresponse_x.start_cons(SEQUENCE);
-
       BER_Decoder tbs_response = basicresponse.start_cons(SEQUENCE);
 
       AlgorithmIdentifier sig_algo;
@@ -106,9 +102,6 @@ Response::Response(const std::vector<byte>& response_bits)
       std::vector<X509_Certificate> certs;
       decode_optional_list(basicresponse, ASN1_Tag(0), certs);
 
-      for(auto c : certs)
-         std::cout << c.to_string() << "\n";
-
       size_t responsedata_version = 0;
       X509_DN name;
       std::vector<byte> key_hash;
@@ -127,13 +120,7 @@ Response::Response(const std::vector<byte>& response_bits)
 
       tbs_response.decode(produced_at);
 
-      std::cout << responsedata_version << "\n";
-      std::cout << "Name = " << name << "\n";
-      std::cout << "Key hash = " << hex_encode(key_hash) << "\n";
-      std::cout << produced_at.readable_string() << "\n";
-
-      std::vector<SingleResponse> sr;
-      tbs_response.decode_list(sr);
+      tbs_response.decode_list(m_responses);
 
       Extensions extensions;
       tbs_response.decode_optional(extensions, ASN1_Tag(1),
@@ -144,6 +131,14 @@ Response::Response(const std::vector<byte>& response_bits)
 
    }
 
+bool Response::affirmative_response_for(const Request& req)
+   {
+   for(auto response : m_responses)
+      if(response.affirmative_response_for(req.issuer(), req.subject()))
+         return true;
+
+   return false;
+   }
 
 }
 
diff --git a/src/cert/ocsp/ocsp.h b/src/cert/ocsp/ocsp.h
index a93b77f5a..f576ba41e 100644
--- a/src/cert/ocsp/ocsp.h
+++ b/src/cert/ocsp/ocsp.h
@@ -26,6 +26,10 @@ class BOTAN_DLL Request
       std::vector<byte> BER_encode() const;
 
       std::string base64_encode() const;
+
+      const X509_Certificate& issuer() const { return m_issuer; }
+
+      const X509_Certificate& subject() const { return m_subject; }
    private:
       X509_Certificate m_issuer, m_subject;
    };
@@ -34,6 +38,11 @@ class BOTAN_DLL Response
    {
    public:
       Response(const std::vector<byte>& response);
+
+      bool affirmative_response_for(const Request&);
+
+   private:
+      std::vector<SingleResponse> m_responses;
    };
 
 }
diff --git a/src/cert/ocsp/ocsp_types.cpp b/src/cert/ocsp/ocsp_types.cpp
index 188c7661c..bead099ab 100644
--- a/src/cert/ocsp/ocsp_types.cpp
+++ b/src/cert/ocsp/ocsp_types.cpp
@@ -23,6 +23,10 @@ namespace OCSP {
 CertID::CertID(const X509_Certificate& issuer,
                const X509_Certificate& subject)
    {
+   /*
+   In practice it seems some responders, including, notably,
+   ocsp.verisign.com, will reject anything but SHA-1 here
+   */
    std::unique_ptr<HashFunction> hash(get_hash("SHA-160"));
 
    m_hash_id = AlgorithmIdentifier(hash->name(), AlgorithmIdentifier::USE_NULL_PARAM);
-- 
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