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- /* sha1.h
- Copyright (c) 2005 Michael D. Leonhard
- http://tamale.net/
- Permission is hereby granted, free of charge, to any person obtaining a copy of
- this software and associated documentation files (the "Software"), to deal in
- the Software without restriction, including without limitation the rights to
- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- of the Software, and to permit persons to whom the Software is furnished to do
- so, subject to the following conditions:
- The above copyright notice and this permission notice shall be included in all
- copies or substantial portions of the Software.
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- SOFTWARE.
- */
- #pragma once
- #include <cstdint>
- #include <string>
- #include <string_view>
- typedef uint32_t Uint32;
- class SHA1
- {
- private:
- // fields
- Uint32 H0 = 0x67452301;
- Uint32 H1 = 0xefcdab89;
- Uint32 H2 = 0x98badcfe;
- Uint32 H3 = 0x10325476;
- Uint32 H4 = 0xc3d2e1f0;
- unsigned char bytes[64];
- Uint32 unprocessedBytes = 0;
- Uint32 size = 0;
- void process();
- public:
- SHA1();
- ~SHA1();
- void addBytes(const char *data, Uint32 num);
- inline void addBytes(std::string_view data) {
- addBytes(data.data(), data.size());
- }
- void getDigest(unsigned char *to);
- inline std::string getDigest() {
- std::string ret(20, '\000');
- getDigest(reinterpret_cast<unsigned char*>(ret.data()));
- return ret;
- }
- // utility methods
- static Uint32 lrot(Uint32 x, int bits);
- static void storeBigEndianUint32(unsigned char *byte, Uint32 num);
- static void hexPrinter(unsigned char *c, int l);
- };
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