Abseil Common Libraries (C++) (grcp 依赖)
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47 lines
1.6 KiB
47 lines
1.6 KiB
// Copyright 2017 The Abseil Authors. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// https://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#ifndef ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_ |
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#define ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_ |
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#include <cstddef> |
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#include "absl/base/config.h" |
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namespace absl { |
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ABSL_NAMESPACE_BEGIN |
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namespace random_internal { |
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// RANDen = RANDom generator or beetroots in Swiss German. |
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// RandenSlow implements the basic state manipulation methods for |
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// architectures lacking AES hardware acceleration intrinsics. |
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class RandenSlow { |
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public: |
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// Size of the entire sponge / state for the randen PRNG. |
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static constexpr size_t kStateBytes = 256; // 2048-bit |
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// Size of the 'inner' (inaccessible) part of the sponge. Larger values would |
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// require more frequent calls to RandenGenerate. |
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static constexpr size_t kCapacityBytes = 16; // 128-bit |
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static void Generate(const void* keys, void* state_void); |
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static void Absorb(const void* seed_void, void* state_void); |
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static const void* GetKeys(); |
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}; |
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} // namespace random_internal |
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ABSL_NAMESPACE_END |
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} // namespace absl |
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#endif // ABSL_RANDOM_INTERNAL_RANDEN_SLOW_H_
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