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5c6e681673
In particular inside class declarations, a static const assignment is technically not a definition, while constexpr is. Signed-off-by: Henner Zeller <h.zeller@acm.org>
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
/*
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sha1.h - header of
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============
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SHA-1 in C++
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============
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100% Public Domain.
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Original C Code
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-- Steve Reid <steve@edmweb.com>
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Small changes to fit into bglibs
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-- Bruce Guenter <bruce@untroubled.org>
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Translation to simpler C++ Code
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-- Volker Grabsch <vog@notjusthosting.com>
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Fixing bugs and improving style
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-- Eugene Hopkinson <slowriot at voxelstorm dot com>
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*/
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#ifndef SHA1_HPP
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#define SHA1_HPP
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#include <iostream>
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#include <string>
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#include <stdint.h>
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class SHA1
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{
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public:
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SHA1();
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void update(const std::string &s);
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void update(std::istream &is);
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std::string final();
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static std::string from_file(const std::string &filename);
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private:
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static constexpr unsigned int DIGEST_INTS = 5; /* number of 32bit integers per SHA1 digest */
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static constexpr unsigned int BLOCK_INTS = 16; /* number of 32bit integers per SHA1 block */
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static constexpr unsigned int BLOCK_BYTES = BLOCK_INTS * 4;
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uint32_t digest[DIGEST_INTS];
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std::string buffer;
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uint64_t transforms;
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void reset();
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void transform(uint32_t block[BLOCK_BYTES]);
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static void read(std::istream &is, std::string &s, size_t max);
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static void buffer_to_block(const std::string &buffer, uint32_t block[BLOCK_INTS]);
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};
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std::string sha1(const std::string &string);
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#endif /* SHA1_HPP */
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