1 files changed, 127 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/ssl_fingerprint.cc b/third_party/libwebrtc/rtc_base/ssl_fingerprint.cc
new file mode 100644
index 0000000000..a43bb159c3
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/ssl_fingerprint.cc
@@ -0,0 +1,127 @@
+/*
+ *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "rtc_base/ssl_fingerprint.h"
+
+#include <ctype.h>
+
+#include <cstdint>
+#include <memory>
+#include <string>
+
+#include "absl/algorithm/container.h"
+#include "absl/strings/string_view.h"
+#include "api/array_view.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/message_digest.h"
+#include "rtc_base/rtc_certificate.h"
+#include "rtc_base/ssl_certificate.h"
+#include "rtc_base/ssl_identity.h"
+#include "rtc_base/string_encode.h"
+
+namespace rtc {
+
+SSLFingerprint* SSLFingerprint::Create(absl::string_view algorithm,
+                                       const rtc::SSLIdentity* identity) {
+  return CreateUnique(algorithm, *identity).release();
+}
+
+std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateUnique(
+    absl::string_view algorithm,
+    const rtc::SSLIdentity& identity) {
+  return Create(algorithm, identity.certificate());
+}
+
+std::unique_ptr<SSLFingerprint> SSLFingerprint::Create(
+    absl::string_view algorithm,
+    const rtc::SSLCertificate& cert) {
+  uint8_t digest_val[64];
+  size_t digest_len;
+  bool ret = cert.ComputeDigest(algorithm, digest_val, sizeof(digest_val),
+                                &digest_len);
+  if (!ret) {
+    return nullptr;
+  }
+  return std::make_unique<SSLFingerprint>(
+      algorithm, ArrayView<const uint8_t>(digest_val, digest_len));
+}
+
+SSLFingerprint* SSLFingerprint::CreateFromRfc4572(
+    absl::string_view algorithm,
+    absl::string_view fingerprint) {
+  return CreateUniqueFromRfc4572(algorithm, fingerprint).release();
+}
+
+std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateUniqueFromRfc4572(
+    absl::string_view algorithm,
+    absl::string_view fingerprint) {
+  if (algorithm.empty() || !rtc::IsFips180DigestAlgorithm(algorithm))
+    return nullptr;
+
+  if (fingerprint.empty())
+    return nullptr;
+
+  char value[rtc::MessageDigest::kMaxSize];
+  size_t value_len =
+      rtc::hex_decode_with_delimiter(ArrayView<char>(value), fingerprint, ':');
+  if (!value_len)
+    return nullptr;
+
+  return std::make_unique<SSLFingerprint>(
+      algorithm,
+      ArrayView<const uint8_t>(reinterpret_cast<uint8_t*>(value), value_len));
+}
+
+std::unique_ptr<SSLFingerprint> SSLFingerprint::CreateFromCertificate(
+    const RTCCertificate& cert) {
+  std::string digest_alg;
+  if (!cert.GetSSLCertificate().GetSignatureDigestAlgorithm(&digest_alg)) {
+    RTC_LOG(LS_ERROR)
+        << "Failed to retrieve the certificate's digest algorithm";
+    return nullptr;
+  }
+
+  std::unique_ptr<SSLFingerprint> fingerprint =
+      CreateUnique(digest_alg, *cert.identity());
+  if (!fingerprint) {
+    RTC_LOG(LS_ERROR) << "Failed to create identity fingerprint, alg="
+                      << digest_alg;
+  }
+  return fingerprint;
+}
+
+SSLFingerprint::SSLFingerprint(absl::string_view algorithm,
+                               ArrayView<const uint8_t> digest_view)
+    : algorithm(algorithm), digest(digest_view.data(), digest_view.size()) {}
+
+SSLFingerprint::SSLFingerprint(absl::string_view algorithm,
+                               const uint8_t* digest_in,
+                               size_t digest_len)
+    : SSLFingerprint(algorithm, MakeArrayView(digest_in, digest_len)) {}
+
+bool SSLFingerprint::operator==(const SSLFingerprint& other) const {
+  return algorithm == other.algorithm && digest == other.digest;
+}
+
+std::string SSLFingerprint::GetRfc4572Fingerprint() const {
+  std::string fingerprint = rtc::hex_encode_with_delimiter(
+      absl::string_view(digest.data<char>(), digest.size()), ':');
+  absl::c_transform(fingerprint, fingerprint.begin(), ::toupper);
+  return fingerprint;
+}
+
+std::string SSLFingerprint::ToString() const {
+  std::string fp_str = algorithm;
+  fp_str.append(" ");
+  fp_str.append(GetRfc4572Fingerprint());
+  return fp_str;
+}
+
+}  // namespace rtc