Eliminate ScopedOpenSSL in favour of scoped_ptr<> specializations.

crypto/ec_signature_creator_openssl.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 "crypto/ec_signature_creator_impl.h"
 
 #include <openssl/bn.h>
 #include <openssl/ec.h>
 #include <openssl/ecdsa.h>
 #include <openssl/evp.h>
 #include <openssl/sha.h>
 
 #include "base/logging.h"
 #include "crypto/ec_private_key.h"
 #include "crypto/openssl_util.h"
+#include "crypto/scoped_openssl_types.h"
 
 namespace crypto {
 
+namespace {
+
+typedef ScopedOpenSSL<ECDSA_SIG, ECDSA_SIG_free>::Type ScopedECDSA_SIG;
+
+}  // namespace
+
 ECSignatureCreatorImpl::ECSignatureCreatorImpl(ECPrivateKey* key)
     : key_(key), signature_len_(0) {
   EnsureOpenSSLInit();
 }
 
 ECSignatureCreatorImpl::~ECSignatureCreatorImpl() {}
 
 bool ECSignatureCreatorImpl::Sign(const uint8* data,
                                   int data_len,
                                   std::vector<uint8>* signature) {
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
-  ScopedOpenSSL<EVP_MD_CTX, EVP_MD_CTX_destroy> ctx(EVP_MD_CTX_create());
+  ScopedEVP_MD_CTX ctx(EVP_MD_CTX_create());
   size_t sig_len = 0;
   if (!ctx.get() ||
       !EVP_DigestSignInit(ctx.get(), NULL, EVP_sha256(), NULL, key_->key()) ||
       !EVP_DigestSignUpdate(ctx.get(), data, data_len) ||
       !EVP_DigestSignFinal(ctx.get(), NULL, &sig_len)) {
     return false;
   }
 
   signature->resize(sig_len);
   if (!EVP_DigestSignFinal(ctx.get(), &signature->front(), &sig_len))
     return false;
 
   // NOTE: A call to EVP_DigestSignFinal() with a NULL second parameter returns
   // a maximum allocation size, while the call without a NULL returns the real
   // one, which may be smaller.
   signature->resize(sig_len);
   return true;
 }
 
 bool ECSignatureCreatorImpl::DecodeSignature(const std::vector<uint8>& der_sig,
                                              std::vector<uint8>* out_raw_sig) {
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
   // Create ECDSA_SIG object from DER-encoded data.
   const unsigned char* der_data = &der_sig.front();
-  ScopedOpenSSL<ECDSA_SIG, ECDSA_SIG_free> ecdsa_sig(
+  ScopedECDSA_SIG ecdsa_sig(
       d2i_ECDSA_SIG(NULL, &der_data, static_cast<long>(der_sig.size())));
   if (!ecdsa_sig.get())
     return false;
 
   // The result is made of two 32-byte vectors.
   const size_t kMaxBytesPerBN = 32;
   std::vector<uint8> result;
   result.resize(2 * kMaxBytesPerBN);
   memset(&result[0], 0, result.size());
 
   BIGNUM* r = ecdsa_sig.get()->r;
   BIGNUM* s = ecdsa_sig.get()->s;
   int r_bytes = BN_num_bytes(r);
   int s_bytes = BN_num_bytes(s);
   // NOTE: Can't really check for equality here since sometimes the value
   // returned by BN_num_bytes() will be slightly smaller than kMaxBytesPerBN.
   if (r_bytes > static_cast<int>(kMaxBytesPerBN) ||
       s_bytes > static_cast<int>(kMaxBytesPerBN)) {
     DLOG(ERROR) << "Invalid key sizes r(" << r_bytes << ") s(" << s_bytes
                 << ")";
     return false;
   }
   BN_bn2bin(ecdsa_sig.get()->r, &result[kMaxBytesPerBN - r_bytes]);
   BN_bn2bin(ecdsa_sig.get()->s, &result[2 * kMaxBytesPerBN - s_bytes]);
   out_raw_sig->swap(result);
   return true;
 }
 
 }  // namespace crypto