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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/libwebrtc/rtc_base/helpers.h | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/rtc_base/helpers.h')
-rw-r--r-- | third_party/libwebrtc/rtc_base/helpers.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/helpers.h b/third_party/libwebrtc/rtc_base/helpers.h new file mode 100644 index 0000000000..51ca672ab5 --- /dev/null +++ b/third_party/libwebrtc/rtc_base/helpers.h @@ -0,0 +1,92 @@ +/* + * 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_HELPERS_H_ +#define RTC_BASE_HELPERS_H_ + +#include <stddef.h> +#include <stdint.h> + +#include <memory> +#include <string> + +#include "absl/strings/string_view.h" +#include "rtc_base/system/rtc_export.h" + +namespace rtc { + +// Interface for RNG implementations. +class RandomGenerator { + public: + virtual ~RandomGenerator() {} + virtual bool Init(const void* seed, size_t len) = 0; + virtual bool Generate(void* buf, size_t len) = 0; +}; + +// Sets the default random generator as the source of randomness. The default +// source uses the OpenSSL RNG and provides cryptographically secure randomness. +void SetDefaultRandomGenerator(); + +// Set a custom random generator. Results produced by CreateRandomXyz +// are cryptographically random iff the output of the supplied generator is +// cryptographically random. +void SetRandomGenerator(std::unique_ptr<RandomGenerator> generator); + +// For testing, we can return predictable data. +void SetRandomTestMode(bool test); + +// Initializes the RNG, and seeds it with the specified entropy. +bool InitRandom(int seed); +bool InitRandom(const char* seed, size_t len); + +// Generates a (cryptographically) random string of the given length. +// We generate base64 values so that they will be printable. +RTC_EXPORT std::string CreateRandomString(size_t length); + +// Generates a (cryptographically) random string of the given length. +// We generate base64 values so that they will be printable. +// Return false if the random number generator failed. +RTC_EXPORT bool CreateRandomString(size_t length, std::string* str); + +// Generates a (cryptographically) random string of the given length, +// with characters from the given table. Return false if the random +// number generator failed. +// For ease of implementation, the function requires that the table +// size evenly divide 256; otherwise, it returns false. +RTC_EXPORT bool CreateRandomString(size_t length, + absl::string_view table, + std::string* str); + +// Generates (cryptographically) random data of the given length. +// Return false if the random number generator failed. +bool CreateRandomData(size_t length, std::string* data); + +// Generates a (cryptographically) random UUID version 4 string. +std::string CreateRandomUuid(); + +// Generates a random id. +uint32_t CreateRandomId(); + +// Generates a 64 bit random id. +RTC_EXPORT uint64_t CreateRandomId64(); + +// Generates a random id > 0. +uint32_t CreateRandomNonZeroId(); + +// Generates a random double between 0.0 (inclusive) and 1.0 (exclusive). +double CreateRandomDouble(); + +// Compute moving average with the given ratio between the previous average +// value and the current value. +double GetNextMovingAverage(double prev_average, double cur, double ratio); + +} // namespace rtc + +#endif // RTC_BASE_HELPERS_H_ |