INNER CODE UNIT · C++

H

7thSamurai/steganography · src/sha256.cpp:127

static void H(const void *data1, std::size_t size1, const void *data2, std::size_t size2, std::uint8_t hash[32]) {  
    SHA256 sha;
    sha.update(data1, size1);
    sha.update(data2, size2);
    sha.finish();
    sha.get_hash(hash);
}

void hmac_sha256(const void *data, std::size_t size, const void *key, std::size_t key_size, std::uint8_t hash[32]) {
    std::uint8_t K[64];
    std::fill_n(K, 64, 0x00);
    
    if (key_size <= 64)
        std::copy_n(static_cast<const std::uint8_t*>(key), key_size, K);
    
    else if (key_size > 64) {
        SHA256 sha;
        sha.update(key, key_size);

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