Private API for extensions like ssh-client that need access to TCP.

base/hmac_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 "base/hmac.h"
 
 #include <openssl/hmac.h>
 
 #include <algorithm>
 #include <vector>
@@ skipping 24 matching lines @@
 }
 
 HMAC::~HMAC() {
   // Zero out key copy.
   plat_->key.assign(plat_->key.size(), 0);
   STLClearObject(&plat_->key);
 }
 
 bool HMAC::Sign(const std::string& data,
                 unsigned char* digest,
-                int digest_length) {
+                int digest_length) const {
   DCHECK_GE(digest_length, 0);
   DCHECK(!plat_->key.empty());  // Init must be called before Sign.
 
   ScopedOpenSSLSafeSizeBuffer<EVP_MAX_MD_SIZE> result(digest, digest_length);
   return ::HMAC(hash_alg_ == SHA1 ? EVP_sha1() : EVP_sha256(),
                 &plat_->key[0], plat_->key.size(),
                 reinterpret_cast<const unsigned char*>(data.data()),
                 data.size(),
                 result.safe_buffer(), NULL);
 }
 
 }  // namespace base