1 /* 2 * libjingle 3 * Copyright 2012 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef TALK_BASE_SHA1DIGEST_H_ 29 #define TALK_BASE_SHA1DIGEST_H_ 30 31 #include "talk/base/messagedigest.h" 32 #include "talk/base/sha1.h" 33 34 namespace talk_base { 35 36 // A simple wrapper for our SHA-1 implementation. 37 class Sha1Digest : public MessageDigest { 38 public: 39 enum { kSize = SHA1_DIGEST_SIZE }; Sha1Digest()40 Sha1Digest() { 41 SHA1Init(&ctx_); 42 } Size()43 virtual size_t Size() const { 44 return kSize; 45 } Update(const void * buf,size_t len)46 virtual void Update(const void* buf, size_t len) { 47 SHA1Update(&ctx_, static_cast<const uint8*>(buf), len); 48 } Finish(void * buf,size_t len)49 virtual size_t Finish(void* buf, size_t len) { 50 if (len < kSize) { 51 return 0; 52 } 53 SHA1Final(&ctx_, static_cast<uint8*>(buf)); 54 SHA1Init(&ctx_); // Reset for next use. 55 return kSize; 56 } 57 58 private: 59 SHA1_CTX ctx_; 60 }; 61 62 } // namespace talk_base 63 64 #endif // TALK_BASE_SHA1DIGEST_H_ 65