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/*
sha1.h - header of
============
SHA-1 in C++
============
100% Public Domain.
Original C Code
-- Steve Reid <steve@edmweb.com>
Small changes to fit into bglibs
-- Bruce Guenter <bruce@untroubled.org>
Translation to simpler C++ Code
-- Volker Grabsch <vog@notjusthosting.com>
Fixing bugs and improving style
-- Eugene Hopkinson <slowriot at voxelstorm dot com>
*/
#ifndef SHA1_HPP
#define SHA1_HPP
#include <iostream>
#include <string>
#include <stdint.h>
class SHA1
{
public:
SHA1();
void update(const std::string &s);
void update(std::istream &is);
std::string final();
static std::string from_file(const std::string &filename);
private:
static constexpr unsigned int DIGEST_INTS = 5; /* number of 32bit integers per SHA1 digest */
static constexpr unsigned int BLOCK_INTS = 16; /* number of 32bit integers per SHA1 block */
static constexpr unsigned int BLOCK_BYTES = BLOCK_INTS * 4;
uint32_t digest[DIGEST_INTS];
std::string buffer;
uint64_t transforms;
void reset();
void transform(uint32_t block[BLOCK_BYTES]);
static void read(std::istream &is, std::string &s, size_t max);
static void buffer_to_block(const std::string &buffer, uint32_t block[BLOCK_INTS]);
};
std::string sha1(const std::string &string);
#endif /* SHA1_HPP */
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