1 /* 2 * Copyright 2012 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_BASE_SHA1DIGEST_H_ 12 #define WEBRTC_BASE_SHA1DIGEST_H_ 13 14 #include "webrtc/base/messagedigest.h" 15 #include "webrtc/base/sha1.h" 16 17 namespace rtc { 18 19 // A simple wrapper for our SHA-1 implementation. 20 class Sha1Digest : public MessageDigest { 21 public: 22 enum { kSize = SHA1_DIGEST_SIZE }; Sha1Digest()23 Sha1Digest() { 24 SHA1Init(&ctx_); 25 } Size()26 virtual size_t Size() const { 27 return kSize; 28 } Update(const void * buf,size_t len)29 virtual void Update(const void* buf, size_t len) { 30 SHA1Update(&ctx_, static_cast<const uint8*>(buf), len); 31 } Finish(void * buf,size_t len)32 virtual size_t Finish(void* buf, size_t len) { 33 if (len < kSize) { 34 return 0; 35 } 36 SHA1Final(&ctx_, static_cast<uint8*>(buf)); 37 SHA1Init(&ctx_); // Reset for next use. 38 return kSize; 39 } 40 41 private: 42 SHA1_CTX ctx_; 43 }; 44 45 } // namespace rtc 46 47 #endif // WEBRTC_BASE_SHA1DIGEST_H_ 48