19f27e6a24
TBR=wu Review URL: https://webrtc-codereview.appspot.com/2389004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@4954 4adac7df-926f-26a2-2b94-8c16560cd09d
68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
/*
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* libjingle
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* Copyright 2004--2012, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_BASE_OPENSSLDIGEST_H_
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#define TALK_BASE_OPENSSLDIGEST_H_
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#include <openssl/evp.h>
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#include "talk/base/messagedigest.h"
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namespace talk_base {
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// An implementation of the digest class that uses OpenSSL.
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class OpenSSLDigest : public MessageDigest {
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public:
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// Creates an OpenSSLDigest with |algorithm| as the hash algorithm.
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explicit OpenSSLDigest(const std::string& algorithm);
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~OpenSSLDigest();
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// Returns the digest output size (e.g. 16 bytes for MD5).
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virtual size_t Size() const;
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// Updates the digest with |len| bytes from |buf|.
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virtual void Update(const void* buf, size_t len);
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// Outputs the digest value to |buf| with length |len|.
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virtual size_t Finish(void* buf, size_t len);
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// Helper function to look up a digest's EVP by name.
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static bool GetDigestEVP(const std::string &algorithm,
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const EVP_MD** md);
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// Helper function to look up a digest's name by EVP.
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static bool GetDigestName(const EVP_MD* md,
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std::string* algorithm);
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// Helper function to get the length of a digest.
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static bool GetDigestSize(const std::string &algorithm,
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size_t* len);
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private:
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EVP_MD_CTX ctx_;
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const EVP_MD* md_;
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};
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} // namespace talk_base
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#endif // TALK_BASE_OPENSSLDIGEST_H_
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