henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2004--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 | #if HAVE_OPENSSL_SSL_H |
| 29 | |
| 30 | #include "talk/base/openssldigest.h" |
| 31 | |
| 32 | #include "talk/base/common.h" |
wu@webrtc.org | 8a77f5b | 2014-02-13 23:18:49 +0000 | [diff] [blame] | 33 | #include "talk/base/openssl.h" |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 34 | |
| 35 | namespace talk_base { |
| 36 | |
| 37 | OpenSSLDigest::OpenSSLDigest(const std::string& algorithm) { |
| 38 | EVP_MD_CTX_init(&ctx_); |
| 39 | if (GetDigestEVP(algorithm, &md_)) { |
| 40 | EVP_DigestInit_ex(&ctx_, md_, NULL); |
| 41 | } else { |
| 42 | md_ = NULL; |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | OpenSSLDigest::~OpenSSLDigest() { |
| 47 | EVP_MD_CTX_cleanup(&ctx_); |
| 48 | } |
| 49 | |
| 50 | size_t OpenSSLDigest::Size() const { |
| 51 | if (!md_) { |
| 52 | return 0; |
| 53 | } |
| 54 | return EVP_MD_size(md_); |
| 55 | } |
| 56 | |
| 57 | void OpenSSLDigest::Update(const void* buf, size_t len) { |
| 58 | if (!md_) { |
| 59 | return; |
| 60 | } |
| 61 | EVP_DigestUpdate(&ctx_, buf, len); |
| 62 | } |
| 63 | |
| 64 | size_t OpenSSLDigest::Finish(void* buf, size_t len) { |
| 65 | if (!md_ || len < Size()) { |
| 66 | return 0; |
| 67 | } |
| 68 | unsigned int md_len; |
| 69 | EVP_DigestFinal_ex(&ctx_, static_cast<unsigned char*>(buf), &md_len); |
| 70 | EVP_DigestInit_ex(&ctx_, md_, NULL); // prepare for future Update()s |
| 71 | ASSERT(md_len == Size()); |
| 72 | return md_len; |
| 73 | } |
| 74 | |
| 75 | bool OpenSSLDigest::GetDigestEVP(const std::string& algorithm, |
| 76 | const EVP_MD** mdp) { |
| 77 | const EVP_MD* md; |
| 78 | if (algorithm == DIGEST_MD5) { |
| 79 | md = EVP_md5(); |
| 80 | } else if (algorithm == DIGEST_SHA_1) { |
| 81 | md = EVP_sha1(); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 82 | } else if (algorithm == DIGEST_SHA_224) { |
| 83 | md = EVP_sha224(); |
| 84 | } else if (algorithm == DIGEST_SHA_256) { |
| 85 | md = EVP_sha256(); |
| 86 | } else if (algorithm == DIGEST_SHA_384) { |
| 87 | md = EVP_sha384(); |
| 88 | } else if (algorithm == DIGEST_SHA_512) { |
| 89 | md = EVP_sha512(); |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 90 | } else { |
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | // Can't happen |
| 95 | ASSERT(EVP_MD_size(md) >= 16); |
| 96 | *mdp = md; |
| 97 | return true; |
| 98 | } |
| 99 | |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 100 | bool OpenSSLDigest::GetDigestName(const EVP_MD* md, |
| 101 | std::string* algorithm) { |
| 102 | ASSERT(md != NULL); |
| 103 | ASSERT(algorithm != NULL); |
| 104 | |
| 105 | int md_type = EVP_MD_type(md); |
| 106 | if (md_type == NID_md5) { |
| 107 | *algorithm = DIGEST_MD5; |
| 108 | } else if (md_type == NID_sha1) { |
| 109 | *algorithm = DIGEST_SHA_1; |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 110 | } else if (md_type == NID_sha224) { |
| 111 | *algorithm = DIGEST_SHA_224; |
| 112 | } else if (md_type == NID_sha256) { |
| 113 | *algorithm = DIGEST_SHA_256; |
| 114 | } else if (md_type == NID_sha384) { |
| 115 | *algorithm = DIGEST_SHA_384; |
| 116 | } else if (md_type == NID_sha512) { |
| 117 | *algorithm = DIGEST_SHA_512; |
mallinath@webrtc.org | 8841d7b | 2013-10-13 17:18:27 +0000 | [diff] [blame] | 118 | } else { |
| 119 | algorithm->clear(); |
| 120 | return false; |
| 121 | } |
| 122 | |
| 123 | return true; |
| 124 | } |
| 125 | |
henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 126 | bool OpenSSLDigest::GetDigestSize(const std::string& algorithm, |
| 127 | size_t* length) { |
| 128 | const EVP_MD *md; |
| 129 | if (!GetDigestEVP(algorithm, &md)) |
| 130 | return false; |
| 131 | |
| 132 | *length = EVP_MD_size(md); |
| 133 | return true; |
| 134 | } |
| 135 | |
| 136 | } // namespace talk_base |
| 137 | |
| 138 | #endif // HAVE_OPENSSL_SSL_H |
| 139 | |