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SHA-1

Abstract

sha1() calculate SHA-1 cryptographic hash function.
sha1() は暗号学的ハッシュ関数である SHA-1 を計算します．

Header file

namespace sstd{
    std::vector<uint8> sha1(const uchar* in, size_t in_len);
    std::vector<uint8> sha1(const std::vector<uint8>& in);
}

Usage

  • main.cpp 
    #include <sstd/sstd.hpp>

std::string uint8_to_str(const std::vector<uint8>& v){
    std::string s;
    for(uint i=0; i<v.size(); ++i){ s += sstd::ssprintf("%02x", (int)v[i]); }
    return s;
}

int main(){
    sstd::mkdir("./tmp");
    sstd::system("head -c 5m /dev/urandom > ./tmp/rand.txt"); // generate 5 MB random file
    sstd::system("sha1sum ./tmp/rand.txt");

    std::vector<uint8> vBin = sstd::read_bin("./tmp/rand.txt"); // read all as a binary
    std::string md5_str = uint8_to_str( sstd::sha1( vBin ) );
    sstd::printn( md5_str );

    sstd::rm("./tmp");
}
  • Execution result 
    2a04535a34d20ce5c112d466af949bdcac3c3d29  ./tmp/rand.txt
md5_str = "2a04535a34d20ce5c112d466af949bdcac3c3d29"

Implementation