Introduce RSAPrivateKey::SignDigest

crypto/rsa_private_key_openssl.cc

 // Copyright (c) 2011 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 "crypto/rsa_private_key.h"
 
 #include <openssl/evp.h>
 #include <openssl/pkcs12.h>
 #include <openssl/rsa.h>
 
@@ skipping 105 matching lines @@
 }
 
 bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8>* output) const {
   return ExportKey(key_, i2d_PKCS8PrivateKeyInfo_bio, output);
 }
 
 bool RSAPrivateKey::ExportPublicKey(std::vector<uint8>* output) const {
   return ExportKey(key_, i2d_PUBKEY_bio, output);
 }
 
+bool RSAPrivateKey::SignDigest(const std::vector<uint8>& digest,
+                               std::vector<uint8>* output) const {
+  RSA* rsa = EVP_PKEY_get1_RSA(key_);
+  if (!rsa)
+    return false;
+  output->resize(RSA_size(rsa));
+  unsigned int size;
+  return RSA_sign(NID_sha1, &digest[0], digest.size(), &(*output)[0], &size,
+                  rsa);
+}
+
 }  // namespace crypto