Introduce RSAPrivateKey::SignDigest

crypto/signature_creator.h

 // 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.
 
 #ifndef CRYPTO_SIGNATURE_CREATOR_H_
 #define CRYPTO_SIGNATURE_CREATOR_H_
 
 #include "build/build_config.h"
 
 #include <vector>
@@ skipping 16 matching lines @@
 // Signs data using a bare private key (as opposed to a full certificate).
 // Currently can only sign data using SHA-1 with RSA encryption.
 class CRYPTO_EXPORT SignatureCreator {
  public:
   ~SignatureCreator();
 
   // Create an instance. The caller must ensure that the provided PrivateKey
   // instance outlives the created SignatureCreator.
   static SignatureCreator* Create(RSAPrivateKey* key);
 
+  // Signs the precomputed SHA-1 digest |data| using private |key| as
+  // specified in PKCS #1.

[Ryan Sleevi, 2013/07/08 21:56:20]

comment nit: PKCS #1 v1.5.

Which at least makes it clearer that it's RSA-SSA (which everyone calls PKCS#1
v1.5, since that was the only signature form listed)

[pfeldman, 2013/07/09 05:21:07]

Done.

+  static bool Sign(RSAPrivateKey* key,
+                   const uint8* data,
+                   int data_len,
+                   std::vector<uint8>* signature);
+
   // Update the signature with more data.
   bool Update(const uint8* data_part, int data_part_len);
 
   // Finalize the signature.
   bool Final(std::vector<uint8>* signature);
 
  private:
   // Private constructor. Use the Create() method instead.
   SignatureCreator();
 
   RSAPrivateKey* key_;
 
 #if defined(USE_OPENSSL)
   EVP_MD_CTX* sign_context_;
 #elif defined(USE_NSS) || defined(OS_WIN) || defined(OS_MACOSX)
   SGNContextStr* sign_context_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(SignatureCreator);
 };
 
 }  // namespace crypto
 
 #endif  // CRYPTO_SIGNATURE_CREATOR_H_