summaryrefslogtreecommitdiffstats
path: root/third_party/libwebrtc/rtc_base/openssl_digest.h
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/libwebrtc/rtc_base/openssl_digest.h')
-rw-r--r--third_party/libwebrtc/rtc_base/openssl_digest.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/openssl_digest.h b/third_party/libwebrtc/rtc_base/openssl_digest.h
new file mode 100644
index 0000000000..c6cc3bb86d
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/openssl_digest.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2004 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.
+ */
+
+#ifndef RTC_BASE_OPENSSL_DIGEST_H_
+#define RTC_BASE_OPENSSL_DIGEST_H_
+
+#include <openssl/ossl_typ.h>
+#include <stddef.h>
+
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/message_digest.h"
+
+namespace rtc {
+
+// An implementation of the digest class that uses OpenSSL.
+class OpenSSLDigest final : public MessageDigest {
+ public:
+ // Creates an OpenSSLDigest with `algorithm` as the hash algorithm.
+ explicit OpenSSLDigest(absl::string_view algorithm);
+ ~OpenSSLDigest() override;
+ // Returns the digest output size (e.g. 16 bytes for MD5).
+ size_t Size() const override;
+ // Updates the digest with `len` bytes from `buf`.
+ void Update(const void* buf, size_t len) override;
+ // Outputs the digest value to `buf` with length `len`.
+ size_t Finish(void* buf, size_t len) override;
+
+ // Helper function to look up a digest's EVP by name.
+ static bool GetDigestEVP(absl::string_view algorithm, const EVP_MD** md);
+ // Helper function to look up a digest's name by EVP.
+ static bool GetDigestName(const EVP_MD* md, std::string* algorithm);
+ // Helper function to get the length of a digest.
+ static bool GetDigestSize(absl::string_view algorithm, size_t* len);
+
+ private:
+ EVP_MD_CTX* ctx_ = nullptr;
+ const EVP_MD* md_;
+};
+
+} // namespace rtc
+
+#endif // RTC_BASE_OPENSSL_DIGEST_H_