| /* |
| * libjingle |
| * Copyright 2004--2012, Google Inc. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef TALK_BASE_OPENSSLDIGEST_H_ |
| #define TALK_BASE_OPENSSLDIGEST_H_ |
| |
| #include <openssl/evp.h> |
| |
| #include "talk/base/messagedigest.h" |
| |
| namespace talk_base { |
| |
| // An implementation of the digest class that uses OpenSSL. |
| class OpenSSLDigest : public MessageDigest { |
| public: |
| // Creates an OpenSSLDigest with |algorithm| as the hash algorithm. |
| explicit OpenSSLDigest(const std::string& algorithm); |
| ~OpenSSLDigest(); |
| // Returns the digest output size (e.g. 16 bytes for MD5). |
| virtual size_t Size() const; |
| // Updates the digest with |len| bytes from |buf|. |
| virtual void Update(const void* buf, size_t len); |
| // Outputs the digest value to |buf| with length |len|. |
| virtual size_t Finish(void* buf, size_t len); |
| |
| // Helper function to look up a digest's EVP by name. |
| static bool GetDigestEVP(const std::string &algorithm, |
| const EVP_MD** md); |
| // Helper function to look up a digest's name by EVP. |
| static bool GetDigestName(const EVP_MD* md, |
| std::string* algorithm); |
| // Helper function to get the length of a digest. |
| static bool GetDigestSize(const std::string &algorithm, |
| size_t* len); |
| |
| private: |
| EVP_MD_CTX ctx_; |
| const EVP_MD* md_; |
| }; |
| |
| } // namespace talk_base |
| |
| #endif // TALK_BASE_OPENSSLDIGEST_H_ |