crypto: change ECSignatureCreator defaults to match SPDY.

net/spdy/spdy_credential_builder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/spdy/spdy_credential_builder.h"
 
 #include "base/logging.h"
 #include "base/string_piece.h"
 #include "crypto/ec_private_key.h"
 #include "crypto/ec_signature_creator.h"
@@ skipping 37 matching lines @@
     return ERR_BAD_SSL_CLIENT_AUTH_CERT;
   // Drop one byte of padding bits count from the BIT STRING
   // (this will always be zero).  Drop one byte of X9.62 format specification
   // (this will always be 4 to indicated an uncompressed point).
   DCHECK_GT(public_key.length(), 2u);
   DCHECK_EQ(0, static_cast<int>(public_key[0]));
   DCHECK_EQ(4, static_cast<int>(public_key[1]));
   public_key = public_key.substr(2, public_key.length());
 
   // Convert the strings into a vector<unit8>
-  std::vector<uint8> proof_vector;
+  std::vector<uint8> der_signature;
   scoped_ptr<crypto::ECPrivateKey> private_key(
       crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
           ServerBoundCertService::kEPKIPassword,
           ToVector(key), ToVector(public_key_info)));
   scoped_ptr<crypto::ECSignatureCreator> creator(
       crypto::ECSignatureCreator::Create(private_key.get()));
   creator->Sign(reinterpret_cast<const unsigned char *>(secret.data()),
-                secret.length(), &proof_vector);
+                secret.length(), &der_signature);
+
+  std::string proof;
+  if (!creator->DecodeSignature(der_signature, &proof)) {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
 
   credential->slot = slot;
   credential->certs.push_back(public_key.as_string());
-  credential->proof.assign(proof_vector.begin(), proof_vector.end());
+  credential->proof = proof;
   return OK;
 }
 
 // static
 std::string SpdyCredentialBuilder::GetCredentialSecret(
     const std::string& tls_unique) {
   const char prefix[] = "SPDY CREDENTIAL ChannelID\0client -> server";
   std::string secret(prefix, arraysize(prefix));
   secret.append(tls_unique);
 
   return secret;
 }
 
 }  // namespace net