henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2004--2012, Google Inc. |
| 4 | * |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 5 | * Redistribution and use in source and binary forms, with or without |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 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. |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 13 | * 3. The name of the author may not be used to endorse or promote products |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 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 |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 19 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 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, |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 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 |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 25 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #ifndef TALK_BASE_OPENSSLDIGEST_H_ |
| 29 | #define TALK_BASE_OPENSSLDIGEST_H_ |
| 30 | |
| 31 | #include <openssl/evp.h> |
| 32 | |
| 33 | #include "talk/base/messagedigest.h" |
| 34 | |
| 35 | namespace talk_base { |
| 36 | |
| 37 | // An implementation of the digest class that uses OpenSSL. |
| 38 | class OpenSSLDigest : public MessageDigest { |
| 39 | public: |
| 40 | // Creates an OpenSSLDigest with |algorithm| as the hash algorithm. |
| 41 | explicit OpenSSLDigest(const std::string& algorithm); |
| 42 | ~OpenSSLDigest(); |
| 43 | // Returns the digest output size (e.g. 16 bytes for MD5). |
| 44 | virtual size_t Size() const; |
| 45 | // Updates the digest with |len| bytes from |buf|. |
| 46 | virtual void Update(const void* buf, size_t len); |
| 47 | // Outputs the digest value to |buf| with length |len|. |
| 48 | virtual size_t Finish(void* buf, size_t len); |
| 49 | |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 50 | // Helper function to look up a digest's EVP by name. |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 51 | static bool GetDigestEVP(const std::string &algorithm, |
| 52 | const EVP_MD** md); |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 53 | // Helper function to look up a digest's name by EVP. |
| 54 | static bool GetDigestName(const EVP_MD* md, |
| 55 | std::string* algorithm); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 56 | // Helper function to get the length of a digest. |
| 57 | static bool GetDigestSize(const std::string &algorithm, |
| 58 | size_t* len); |
| 59 | |
| 60 | private: |
| 61 | EVP_MD_CTX ctx_; |
| 62 | const EVP_MD* md_; |
| 63 | }; |
| 64 | |
| 65 | } // namespace talk_base |
| 66 | |
| 67 | #endif // TALK_BASE_OPENSSLDIGEST_H_ |