3 * Copyright 2004--2012, Google Inc.
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9 * this list of conditions and the following disclaimer.
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28 #if HAVE_OPENSSL_SSL_H
30 #include "talk/base/openssldigest.h"
32 #include "talk/base/common.h"
33 #include "talk/base/openssl.h"
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);
46 OpenSSLDigest::~OpenSSLDigest() {
47 EVP_MD_CTX_cleanup(&ctx_);
50 size_t OpenSSLDigest::Size() const {
54 return EVP_MD_size(md_);
57 void OpenSSLDigest::Update(const void* buf, size_t len) {
61 EVP_DigestUpdate(&ctx_, buf, len);
64 size_t OpenSSLDigest::Finish(void* buf, size_t len) {
65 if (!md_ || len < Size()) {
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());
75 bool OpenSSLDigest::GetDigestEVP(const std::string& algorithm,
78 if (algorithm == DIGEST_MD5) {
80 } else if (algorithm == DIGEST_SHA_1) {
82 } else if (algorithm == DIGEST_SHA_224) {
84 } else if (algorithm == DIGEST_SHA_256) {
86 } else if (algorithm == DIGEST_SHA_384) {
88 } else if (algorithm == DIGEST_SHA_512) {
95 ASSERT(EVP_MD_size(md) >= 16);
100 bool OpenSSLDigest::GetDigestName(const EVP_MD* md,
101 std::string* algorithm) {
103 ASSERT(algorithm != NULL);
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;
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;
126 bool OpenSSLDigest::GetDigestSize(const std::string& algorithm,
129 if (!GetDigestEVP(algorithm, &md))
132 *length = EVP_MD_size(md);
136 } // namespace talk_base
138 #endif // HAVE_OPENSSL_SSL_H