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

crypto/signature_verifier_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/signature_verifier.h"
 
+#include <openssl/bytestring.h>
 #include <openssl/evp.h>
 #include <openssl/x509.h>
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "crypto/openssl_util.h"
 #include "crypto/scoped_openssl_types.h"
@@ skipping 115 matching lines @@
                                    const uint8_t* public_key_info,
                                    int public_key_info_len,
                                    EVP_PKEY_CTX** pkey_ctx) {
   if (verify_context_)
     return false;
 
   verify_context_ = new VerifyContext;
 
   signature_.assign(signature, signature + signature_len);
 
-  const uint8_t* ptr = public_key_info;
-  ScopedEVP_PKEY public_key(d2i_PUBKEY(nullptr, &ptr, public_key_info_len));
-  if (!public_key.get() || ptr != public_key_info + public_key_info_len)
+  CBS cbs;
+  CBS_init(&cbs, public_key_info, public_key_info_len);
+  ScopedEVP_PKEY public_key(EVP_parse_public_key(&cbs));
+  if (!public_key || CBS_len(&cbs) != 0)
     return false;
 
   verify_context_->ctx.reset(EVP_MD_CTX_create());
   int rv = EVP_DigestVerifyInit(verify_context_->ctx.get(), pkey_ctx,
                                 digest, nullptr, public_key.get());
   return rv == 1;
 }
 
 void SignatureVerifier::Reset() {
   delete verify_context_;
   verify_context_ = NULL;
   signature_.clear();
 }
 
 }  // namespace crypto