Cut down on usage of deprecated APIs in //crypto.

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>
@@ skipping 37 matching lines @@
   // one, which may be smaller.
   signature->resize(sig_len);
   return true;
 }
 
 bool ECSignatureCreatorImpl::DecodeSignature(
     const std::vector<uint8_t>& der_sig,
     std::vector<uint8_t>* out_raw_sig) {
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
   // Create ECDSA_SIG object from DER-encoded data.
-  const unsigned char* der_data = &der_sig.front();
   ScopedECDSA_SIG ecdsa_sig(
-      d2i_ECDSA_SIG(NULL, &der_data, static_cast<long>(der_sig.size())));
+      ECDSA_SIG_from_bytes(der_sig.data(), 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_t> result(2 * kMaxBytesPerBN);
 
   if (!BN_bn2bin_padded(&result[0], kMaxBytesPerBN, ecdsa_sig->r) ||
       !BN_bn2bin_padded(&result[kMaxBytesPerBN], kMaxBytesPerBN,
                         ecdsa_sig->s)) {
     return false;
   }
   out_raw_sig->swap(result);
   return true;
 }
 
 }  // namespace crypto