125 lines
4.0 KiB
C++
125 lines
4.0 KiB
C++
/*
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* Copyright 2012 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/ssl_fingerprint.h"
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#include <ctype.h>
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#include <cstdint>
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#include <memory>
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#include <string>
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#include "absl/algorithm/container.h"
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#include "rtc_base/logging.h"
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#include "rtc_base/message_digest.h"
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#include "rtc_base/rtc_certificate.h"
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#include "rtc_base/ssl_certificate.h"
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#include "rtc_base/ssl_identity.h"
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#include "rtc_base/string_encode.h"
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namespace rtc {
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SSLFingerprint* SSLFingerprint::Create(const std::string& algorithm,
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const rtc::SSLIdentity* identity) {
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return CreateUnique(algorithm, *identity).release();
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}
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std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateUnique(
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const std::string& algorithm,
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const rtc::SSLIdentity& identity) {
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return Create(algorithm, identity.certificate());
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}
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std::unique_ptr<SSLFingerprint> SSLFingerprint::Create(
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const std::string& algorithm,
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const rtc::SSLCertificate& cert) {
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uint8_t digest_val[64];
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size_t digest_len;
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bool ret = cert.ComputeDigest(algorithm, digest_val, sizeof(digest_val),
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&digest_len);
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if (!ret) {
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return nullptr;
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}
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return std::make_unique<SSLFingerprint>(
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algorithm, ArrayView<const uint8_t>(digest_val, digest_len));
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}
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SSLFingerprint* SSLFingerprint::CreateFromRfc4572(
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const std::string& algorithm,
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const std::string& fingerprint) {
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return CreateUniqueFromRfc4572(algorithm, fingerprint).release();
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}
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std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateUniqueFromRfc4572(
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const std::string& algorithm,
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const std::string& fingerprint) {
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if (algorithm.empty() || !rtc::IsFips180DigestAlgorithm(algorithm))
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return nullptr;
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if (fingerprint.empty())
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return nullptr;
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char value[rtc::MessageDigest::kMaxSize];
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size_t value_len = rtc::hex_decode_with_delimiter(
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value, sizeof(value), fingerprint.c_str(), fingerprint.length(), ':');
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if (!value_len)
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return nullptr;
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return std::make_unique<SSLFingerprint>(
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algorithm,
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ArrayView<const uint8_t>(reinterpret_cast<uint8_t*>(value), value_len));
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}
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std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateFromCertificate(
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const RTCCertificate& cert) {
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std::string digest_alg;
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if (!cert.GetSSLCertificate().GetSignatureDigestAlgorithm(&digest_alg)) {
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RTC_LOG(LS_ERROR)
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<< "Failed to retrieve the certificate's digest algorithm";
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return nullptr;
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}
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std::unique_ptr<SSLFingerprint> fingerprint =
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CreateUnique(digest_alg, *cert.identity());
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if (!fingerprint) {
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RTC_LOG(LS_ERROR) << "Failed to create identity fingerprint, alg="
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<< digest_alg;
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}
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return fingerprint;
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}
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SSLFingerprint::SSLFingerprint(const std::string& algorithm,
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ArrayView<const uint8_t> digest_view)
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: algorithm(algorithm), digest(digest_view.data(), digest_view.size()) {}
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SSLFingerprint::SSLFingerprint(const std::string& algorithm,
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const uint8_t* digest_in,
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size_t digest_len)
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: SSLFingerprint(algorithm, MakeArrayView(digest_in, digest_len)) {}
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bool SSLFingerprint::operator==(const SSLFingerprint& other) const {
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return algorithm == other.algorithm && digest == other.digest;
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}
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std::string SSLFingerprint::GetRfc4572Fingerprint() const {
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std::string fingerprint =
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rtc::hex_encode_with_delimiter(digest.data<char>(), digest.size(), ':');
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absl::c_transform(fingerprint, fingerprint.begin(), ::toupper);
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return fingerprint;
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}
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std::string SSLFingerprint::ToString() const {
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std::string fp_str = algorithm;
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fp_str.append(" ");
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fp_str.append(GetRfc4572Fingerprint());
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return fp_str;
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}
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} // namespace rtc
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