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61c5cc8eb5
OpenSSL implementations are all final implementations of their more abstract SSL variants. This should be both documented and enforced by the use of the final keyword to indicate to future WebRTC contributors that this is the intended depth of inheritance and it shouldn't be extended again. Hopefully this minor change will help keep the code simpler to maintain going forward. Bug: webrtc:9860 Change-Id: Ie22de722214e3b209c3d7727a93ac819c112434e Reviewed-on: https://webrtc-review.googlesource.com/c/108203 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Benjamin Wright <benwright@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25401}
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*
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* Copyright 2004 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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#ifndef RTC_BASE_OPENSSLDIGEST_H_
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#define RTC_BASE_OPENSSLDIGEST_H_
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#include <openssl/base.h>
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#include <stddef.h>
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#include <string>
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#include "rtc_base/messagedigest.h"
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namespace rtc {
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// An implementation of the digest class that uses OpenSSL.
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class OpenSSLDigest final : public MessageDigest {
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public:
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// Creates an OpenSSLDigest with |algorithm| as the hash algorithm.
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explicit OpenSSLDigest(const std::string& algorithm);
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~OpenSSLDigest() override;
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// Returns the digest output size (e.g. 16 bytes for MD5).
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size_t Size() const override;
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// Updates the digest with |len| bytes from |buf|.
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void Update(const void* buf, size_t len) override;
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// Outputs the digest value to |buf| with length |len|.
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size_t Finish(void* buf, size_t len) override;
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// Helper function to look up a digest's EVP by name.
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static bool GetDigestEVP(const std::string& algorithm, const EVP_MD** md);
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// Helper function to look up a digest's name by EVP.
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static bool GetDigestName(const EVP_MD* md, std::string* algorithm);
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// Helper function to get the length of a digest.
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static bool GetDigestSize(const std::string& algorithm, size_t* len);
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private:
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EVP_MD_CTX* ctx_ = nullptr;
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const EVP_MD* md_;
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};
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} // namespace rtc
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#endif // RTC_BASE_OPENSSLDIGEST_H_
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