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7fa9057a05
This is part of a large-scale effort to increase adoption of absl::string_view across the WebRTC code base. This CL converts the majority of "const std::string&"s in function parameters under rtc_base/ to absl::string_view. Bug: webrtc:13579 Change-Id: I2b1e3776aa42326aa405f76bb324a2d233b21dca Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/254081 Reviewed-by: Niels Moller <nisse@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Xavier Lepaul <xalep@webrtc.org> Reviewed-by: Anders Lilienthal <andersc@webrtc.org> Reviewed-by: Per Kjellander <perkj@webrtc.org> Commit-Queue: Ali Tofigh <alito@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36239}
51 lines
1.7 KiB
C++
51 lines
1.7 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_OPENSSL_DIGEST_H_
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#define RTC_BASE_OPENSSL_DIGEST_H_
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#include <openssl/ossl_typ.h>
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#include <stddef.h>
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#include <string>
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#include "absl/strings/string_view.h"
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#include "rtc_base/message_digest.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(absl::string_view 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(absl::string_view 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(absl::string_view 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_OPENSSL_DIGEST_H_
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