Home | History | Annotate | Download | only in base 
      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 };
     40   Sha1Digest() {
     41     SHA1Init(&ctx_);
     42   }
     43   virtual size_t Size() const {
     44     return kSize;
     45   }
     46   virtual void Update(const void* buf, size_t len) {
     47     SHA1Update(&ctx_, static_cast<const uint8*>(buf), len);
     48   }
     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