Revert of Switch Windows over to BoringSSL from NSS.

net/ssl/openssl_platform_key_win.cc

 // Copyright 2014 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 "net/ssl/openssl_platform_key.h"
 
 #include <windows.h>
 #include <NCrypt.h>
 
 #include <string.h>
@@ skipping 488 matching lines @@
   }
   sig->r = BN_bin2bn(&raw_sig[0], degree, nullptr);
   sig->s = BN_bin2bn(&raw_sig[degree], degree, nullptr);
   if (!sig->r || !sig->s) {
     OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED);
     return 0;
   }
 
   // Ensure the DER-encoded signature fits in the bounds.
   int len = i2d_ECDSA_SIG(sig.get(), nullptr);
-  if (len < 0 || static_cast<size_t>(len) > ECDSA_size(ec_key)) {
+  if (len < 0 || len > ECDSA_size(ec_key)) {
     OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED);
     return 0;
   }
 
   len = i2d_ECDSA_SIG(sig.get(), &out_sig);
   if (len < 0) {
     OpenSSLPutNetError(FROM_HERE, ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED);
     return 0;
   }
   *out_sig_len = len;
@@ skipping 181 matching lines @@
     case EVP_PKEY_RSA:
       return CreateRSAWrapper(key.Pass(), key_length);
     case EVP_PKEY_EC:
       return CreateECDSAWrapper(key.Pass(), key_length);
     default:
       return nullptr;
   }
 }
 
 }  // namespace net