Add base::SHA1HashBytes

base/sha1_portable.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/sha1.h"
 
+#include <string.h>
+
 #include "base/basictypes.h"
 
 namespace base {
 
 // Implementation of SHA-1. Only handles data in byte-sized blocks,
 // which simplifies the code a fair bit.
 
 // Identifier names follow notation in FIPS PUB 180-3, where you'll
 // also find a description of the algorithm:
 // http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf
@@ skipping 171 matching lines @@
   H[0] += A;
   H[1] += B;
   H[2] += C;
   H[3] += D;
   H[4] += E;
 
   cursor = 0;
 }
 
 std::string SHA1HashString(const std::string& str) {
+  char hash[SecureHashAlgorithm::kDigestSizeBytes];
+  SHA1HashBytes(reinterpret_cast<const unsigned char*>(str.c_str()),
+                str.length(), reinterpret_cast<unsigned char*>(hash));
+  return std::string(hash, SecureHashAlgorithm::kDigestSizeBytes);
+}
+
+void SHA1HashBytes(const unsigned char* data, size_t len,
+                   unsigned char* hash) {
   SecureHashAlgorithm sha;
-  sha.Update(str.c_str(), str.length());
+  sha.Update(data, len);
   sha.Final();
-  std::string out(reinterpret_cast<const char*>(sha.Digest()),
-                  SecureHashAlgorithm::kDigestSizeBytes);
-  return out;
+
+  memcpy(hash, sha.Digest(), SecureHashAlgorithm::kDigestSizeBytes);
 }
 
 }  // namespace base