PicoSHA2

Picosha2 - um gerador de hash sha256 C ++

Copyright © 2017 Okdshin

Introdução

Picosha2 é um minúsculo gerador de hash sha256 para C ++ com as seguintes propriedades:

• Apenas arquivos de cabeçalho
• Nenhuma dependência externa (usa apenas bibliotecas C ++ padrão)
• Amigável ao STL
• licenciado sob licença do MIT

Gerando sha256 hash e hash hexade

 // any STL sequantial container (vector, list, dequeue...)
std::string src_str = " The quick brown fox jumps over the lazy dog " ;

std::vector< unsigned char > hash (picosha2::k_digest_size);
picosha2::hash256 (src_str.begin(), src_str.end(), hash.begin(), hash.end());

std::string hex_str = picosha2::bytes_to_hex_string(hash.begin(), hash.end());

Gerando SHA256 Hash e Hash Hex String de Byte Stream

picosha2::hash256_one_by_one hasher;
...
hasher.process(block.begin(), block.end());
...
hasher.finish();

std::vector< unsigned char > hash (picosha2::k_digest_size);
hasher.get_hash_bytes(hash.begin(), hash.end());

std::string hex_str = picosha2::get_hash_hex_string(hasher);

O example/interactive_hasher.cpp possui informações mais detalhadas.

Gerando hash sha256 a partir de um arquivo binário

std::ifstream f ( " file.txt " , std::ios::binary);
std::vector< unsigned char > s (picosha2::k_digest_size);
picosha2::hash256 (f, s.begin(), s.end());

Este hash256 pode usar menos memória do que ler todo o arquivo.

Gerando SHA256 Hash Hex String de Std :: String

std::string src_str = " The quick brown fox jumps over the lazy dog " ;
std::string hash_hex_str;
picosha2::hash256_hex_string (src_str, hash_hex_str);
std::cout << hash_hex_str << std::endl;
// this output is "d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592" 

std::string src_str = " The quick brown fox jumps over the lazy dog " ;
std::string hash_hex_str = picosha2::hash256_hex_string(src_str);
std::cout << hash_hex_str << std::endl;
// this output is "d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592" 

std::string src_str = " The quick brown fox jumps over the lazy dog. " ; // add '.'
std::string hash_hex_str = picosha2::hash256_hex_string(src_str.begin(), src_str.end());
std::cout << hash_hex_str << std::endl;
// this output is "ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c" 

Gerando SHA256 Hash Hex String da sequência de bytes

std::vector< unsigned char > src_vect (...);
std::string hash_hex_str;
picosha2::hash256_hex_string (src_vect, hash_hex_str);

std::vector< unsigned char > src_vect (...);
std::string hash_hex_str = picosha2::hash256_hex_string(src_vect);

 unsigned char src_c_array[picosha2::k_digest_size] = {...};
std::string hash_hex_str;
picosha2::hash256_hex_string (src_c_array, src_c_array+picosha2::k_digest_size, hash_hex_str);

 unsigned char src_c_array[picosha2::k_digest_size] = {...};
std::string hash_hex_str = picosha2::hash256_hex_string(src_c_array, src_c_array+picosha2::k_digest_size);

Gerando SHA256 Hash Byte Sequence a partir de contêiner sequencial STL

 // any STL sequantial container (vector, list, dequeue...)
std::string src_str = " The quick brown fox jumps over the lazy dog " ;

// any STL sequantial containers (vector, list, dequeue...)
std::vector< unsigned char > hash (picosha2::k_digest_size);

// in: container, out: container
picosha2::hash256 (src_str, hash);

 // any STL sequantial container (vector, list, dequeue...)
std::string src_str = " The quick brown fox jumps over the lazy dog " ;

// any STL sequantial containers (vector, list, dequeue...)
std::vector< unsigned char > hash (picosha2::k_digest_size);

// in: iterator pair, out: contaner
picosha2::hash256 (src_str.begin(), src_str.end(), hash);

std::string src_str = " The quick brown fox jumps over the lazy dog " ;
unsigned char hash_byte_c_array[picosha2::k_digest_size];
// in: container, out: iterator(pointer) pair
picosha2::hash256 (src_str, hash_byte_c_array, hash_byte_c_array+picosha2::k_digest_size);

std::string src_str = " The quick brown fox jumps over the lazy dog " ;
std::vector< unsigned char > hash (picosha2::k_digest_size);
// in: iterator pair, out: iterator pair
picosha2::hash256 (src_str.begin(), src_str.end(), hash.begin(), hash.end());