Implements Signature Creator & Verifier for openssl

base/crypto/rsa_private_key_openssl.cc

 // Copyright (c) 2010 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 "base/crypto/rsa_private_key.h"
 
 #include <openssl/evp.h>
 #include <openssl/pkcs12.h>
 #include <openssl/rsa.h>
 
@@ skipping 11 matching lines @@
 // the supplied BIO, returning 1 on success or 0 on failure.
 typedef int (ExportFunction)(BIO*, EVP_PKEY*);
 
 // Helper to export |key| into |output| via the specified ExportFunction.
 bool ExportKey(EVP_PKEY* key,
                ExportFunction export_fn,
                std::vector<uint8>* output) {
   if (!key)
     return false;
 
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
   ScopedOpenSSL<BIO, BIO_free_all> bio(BIO_new(BIO_s_mem()));
 
   int res = export_fn(bio.get(), key);
-  ClearOpenSSLERRStack();
   if (!res)
     return false;
 
   char* data = NULL;
   long len = BIO_get_mem_data(bio.get(), &data);
   if (!data || len < 0)
     return false;
 
   STLAssignToVector(output, reinterpret_cast<const uint8*>(data), len);
   return true;
 }
 
 }  // namespace
 
 // static
 RSAPrivateKey* RSAPrivateKey::Create(uint16 num_bits) {
-  EnsureOpenSSLInit();
-
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
   ScopedOpenSSL<RSA, RSA_free> rsa_key(RSA_generate_key(num_bits, 65537L,
                                                         NULL, NULL));
-  ClearOpenSSLERRStack();
   if (!rsa_key.get())
     return NULL;
 
   scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey);
   result->key_ = EVP_PKEY_new();
   if (!result->key_ || !EVP_PKEY_set1_RSA(result->key_, rsa_key.get()))
     return NULL;
 
   return result.release();
 }
 
 // static
 RSAPrivateKey* RSAPrivateKey::CreateSensitive(uint16 num_bits) {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 // static
 RSAPrivateKey* RSAPrivateKey::CreateFromPrivateKeyInfo(
     const std::vector<uint8>& input) {
-  EnsureOpenSSLInit();
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
 
   // BIO_new_mem_buf is not const aware, but it does not modify the buffer.
   char* data = reinterpret_cast<char*>(const_cast<uint8*>(input.data()));
   ScopedOpenSSL<BIO, BIO_free_all> bio(BIO_new_mem_buf(data, input.size()));
   if (!bio.get())
     return NULL;
 
   // Importing is a little more involved than exporting, as we must first
   // PKCS#8 decode the input, and then import the EVP_PKEY from Private Key
   // Info structure returned.
   ScopedOpenSSL<PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO_free> p8inf(
       d2i_PKCS8_PRIV_KEY_INFO_bio(bio.get(), NULL));
-  ClearOpenSSLERRStack();
   if (!p8inf.get())
     return NULL;
 
   scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey);
   result->key_ = EVP_PKCS82PKEY(p8inf.get());
-  ClearOpenSSLERRStack();
   if (!result->key_)
     return NULL;
 
   return result.release();
 }
 
 // static
 RSAPrivateKey* RSAPrivateKey::CreateSensitiveFromPrivateKeyInfo(
     const std::vector<uint8>& input) {
   NOTIMPLEMENTED();
@@ skipping 18 matching lines @@
 
 bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8>* output) {
   return ExportKey(key_, i2d_PKCS8PrivateKeyInfo_bio, output);
 }
 
 bool RSAPrivateKey::ExportPublicKey(std::vector<uint8>* output) {
   return ExportKey(key_, i2d_PUBKEY_bio, output);
 }
 
 }  // namespace base