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48 lines
1.5 KiB
48 lines
1.5 KiB
// Copyright 2022 The Centipede 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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#include "./common/hash.h"
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#include <cstddef>
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#include <cstdint>
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#include <string>
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#include <string_view>
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#include "./common/defs.h"
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#include "./common/sha1.h"
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namespace fuzztest::internal {
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std::string Hash(ByteSpan span) {
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// Compute SHA1.
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uint8_t sha1[kShaDigestLength];
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SHA1(span.data(), span.size(), sha1);
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// Convert SHA1 to text.
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static_assert(kHashLen == 2 * kShaDigestLength);
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char sha1_hex_text[kHashLen];
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static const char hex[16] = {'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
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for (size_t i = 0; i < kShaDigestLength; i++) {
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sha1_hex_text[i * 2 + 0] = hex[sha1[i] / 16];
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sha1_hex_text[i * 2 + 1] = hex[sha1[i] % 16];
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}
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return {sha1_hex_text, sha1_hex_text + kHashLen};
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}
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std::string Hash(std::string_view str) {
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static_assert(sizeof(decltype(str)::value_type) == sizeof(uint8_t));
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return Hash(AsByteSpan(str));
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}
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} // namespace fuzztest::internal
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