B4A Library Native SHA-512

Hi guys,

Here's a native version of the SHA-512 algorithm, no extras required.
If you use it, don't forget to include the license file and/or text. Enjoy! :)

B4X:
Dim hashFunc As SHA512
Log(hashFunc.Sha512("grape"))

'Output:
'9375d1abdb644a01955bccad12e2f5c2bd8a3e226187e548d99c559a99461453b980123746753d07c169c22a5d9cc75cb158f0e8d8c0e713559775b5e1391fc4

Source Project: http://www.zedwood.com/article/cpp-sha512-function

B4X:
#include <string>

char b4aOutputBuffer[128];
std::string sha512(std::string input);

//B4A::ignore
class SHA512
{
    protected:
    typedef unsigned char uint8;
    typedef size_t uint32;
    typedef unsigned long long uint64;

    const static uint64 sha512_k[];
    static const size_t SHA384_512_BLOCK_SIZE = (1024 / 8);

    public:
    void init();
    void update(const unsigned char *message, size_t len);
    void final(unsigned char *digest);
    static const size_t DIGEST_SIZE = (512 / 8);

    protected:
    void transform(const unsigned char *message, size_t block_nb);
    size_t m_tot_len;
    size_t m_len;
    unsigned char m_block[2 * SHA384_512_BLOCK_SIZE];
    uint64 m_h[8];
};

#define SHA2_SHFR(x, n)    (x >> n)
#define SHA2_ROTR(x, n)   ((x >> n) | (x << ((sizeof(x) << 3) - n)))
#define SHA2_ROTL(x, n)   ((x << n) | (x >> ((sizeof(x) << 3) - n)))
#define SHA2_CH(x, y, z)  ((x & y) ^ (~x & z))
#define SHA2_MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
#define SHA512_F1(x) (SHA2_ROTR(x, 28) ^ SHA2_ROTR(x, 34) ^ SHA2_ROTR(x, 39))
#define SHA512_F2(x) (SHA2_ROTR(x, 14) ^ SHA2_ROTR(x, 18) ^ SHA2_ROTR(x, 41))
#define SHA512_F3(x) (SHA2_ROTR(x,  1) ^ SHA2_ROTR(x,  8) ^ SHA2_SHFR(x,  7))
#define SHA512_F4(x) (SHA2_ROTR(x, 19) ^ SHA2_ROTR(x, 61) ^ SHA2_SHFR(x,  6))

#define SHA2_UNPACK32(x, str)                 \
{                                             \
    *((str) + 3) = (uint8) ((x)      );       \
    *((str) + 2) = (uint8) ((x) >>  8);       \
    *((str) + 1) = (uint8) ((x) >> 16);       \
    *((str) + 0) = (uint8) ((x) >> 24);       \
}

#define SHA2_UNPACK64(x, str)                 \
{                                             \
    *((str) + 7) = (uint8) ((x)      );       \
    *((str) + 6) = (uint8) ((x) >>  8);       \
    *((str) + 5) = (uint8) ((x) >> 16);       \
    *((str) + 4) = (uint8) ((x) >> 24);       \
    *((str) + 3) = (uint8) ((x) >> 32);       \
    *((str) + 2) = (uint8) ((x) >> 40);       \
    *((str) + 1) = (uint8) ((x) >> 48);       \
    *((str) + 0) = (uint8) ((x) >> 56);       \
}

#define SHA2_PACK64(str, x)                   \
{                                             \
    *(x) =  ((uint64) *((str) + 7)      )     \
          | ((uint64) *((str) + 6) <<  8)     \
          | ((uint64) *((str) + 5) << 16)     \
          | ((uint64) *((str) + 4) << 24)     \
          | ((uint64) *((str) + 3) << 32)     \
          | ((uint64) *((str) + 2) << 40)     \
          | ((uint64) *((str) + 1) << 48)     \
          | ((uint64) *((str) + 0) << 56);    \
}

const unsigned long long SHA512::sha512_k[80] =
{
    0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
    0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
    0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
    0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
    0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
    0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
    0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
    0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
    0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
    0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
    0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
    0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
    0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
    0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
    0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
    0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
    0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
    0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
    0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
    0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
    0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
    0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
    0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
    0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
    0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
    0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
    0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
    0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
    0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
    0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
    0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
    0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
    0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
    0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
    0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
    0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
    0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
    0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
    0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
    0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
};

//B4A::ignore
void SHA512::transform(const unsigned char *message, size_t block_nb)
{
    uint64 w[80];
    uint64 wv[8];
    uint64 t1, t2;
    const unsigned char *sub_block;
    int i, j;
    for (i = 0; i < (int)block_nb; i++) {
        sub_block = message + (i << 7);
        for (j = 0; j < 16; j++) {
            SHA2_PACK64(&sub_block[j << 3], &w[j]);
        }
        for (j = 16; j < 80; j++) {
            w[j] = SHA512_F4(w[j - 2]) + w[j - 7] + SHA512_F3(w[j - 15]) + w[j - 16];
        }
        for (j = 0; j < 8; j++) {
            wv[j] = m_h[j];
        }
        for (j = 0; j < 80; j++) {
            t1 = wv[7] + SHA512_F2(wv[4]) + SHA2_CH(wv[4], wv[5], wv[6])
                + sha512_k[j] + w[j];
            t2 = SHA512_F1(wv[0]) + SHA2_MAJ(wv[0], wv[1], wv[2]);
            wv[7] = wv[6];
            wv[6] = wv[5];
            wv[5] = wv[4];
            wv[4] = wv[3] + t1;
            wv[3] = wv[2];
            wv[2] = wv[1];
            wv[1] = wv[0];
            wv[0] = t1 + t2;
        }
        for (j = 0; j < 8; j++) {
            m_h[j] += wv[j];
        }

    }
}

//B4A::ignore
void SHA512::init()
{
    m_h[0] = 0x6a09e667f3bcc908ULL;
    m_h[1] = 0xbb67ae8584caa73bULL;
    m_h[2] = 0x3c6ef372fe94f82bULL;
    m_h[3] = 0xa54ff53a5f1d36f1ULL;
    m_h[4] = 0x510e527fade682d1ULL;
    m_h[5] = 0x9b05688c2b3e6c1fULL;
    m_h[6] = 0x1f83d9abfb41bd6bULL;
    m_h[7] = 0x5be0cd19137e2179ULL;
    m_len = 0;
    m_tot_len = 0;
}

//B4A::ignore
void SHA512::update(const unsigned char *message, size_t len)
{
    size_t block_nb;
    size_t new_len, rem_len, tmp_len;
    const unsigned char *shifted_message;
    tmp_len = SHA384_512_BLOCK_SIZE - m_len;
    rem_len = len < tmp_len ? len : tmp_len;
    memcpy(&m_block[m_len], message, rem_len);
    if (m_len + len < SHA384_512_BLOCK_SIZE) {
        m_len += len;
        return;
    }
    new_len = len - rem_len;
    block_nb = new_len / SHA384_512_BLOCK_SIZE;
    shifted_message = message + rem_len;
    transform(m_block, 1);
    transform(shifted_message, block_nb);
    rem_len = new_len % SHA384_512_BLOCK_SIZE;
    memcpy(m_block, &shifted_message[block_nb << 7], rem_len);
    m_len = rem_len;
    m_tot_len += (block_nb + 1) << 7;
}

//B4A::ignore
void SHA512::final(unsigned char *digest)
{
    size_t block_nb;
    size_t pm_len;
    size_t len_b;
    int i;
    block_nb = 1 + ((SHA384_512_BLOCK_SIZE - 17)
        < (m_len % SHA384_512_BLOCK_SIZE));
    len_b = (m_tot_len + m_len) << 3;
    pm_len = block_nb << 7;
    memset(m_block + m_len, 0, pm_len - m_len);
    m_block[m_len] = 0x80;
    SHA2_UNPACK32(len_b, m_block + pm_len - 4);
    transform(m_block, block_nb);
    for (i = 0; i < 8; i++) {
        SHA2_UNPACK64(m_h[i], &digest[i << 3]);
    }
}

//B4A::ignore
std::string sha512(std::string input)
{
    unsigned char digest[SHA512::DIGEST_SIZE];
    memset(digest, 0, SHA512::DIGEST_SIZE);
    SHA512 ctx = SHA512();
    ctx.init();
    ctx.update((unsigned char*)input.c_str(), input.length());
    ctx.final(digest);

    char buf[2 * SHA512::DIGEST_SIZE + 1];
    buf[2 * SHA512::DIGEST_SIZE] = 0;
    for (int i = 0; i < SHA512::DIGEST_SIZE; i++)
        sprintf(buf + i * 2, "%02x", digest[i]);
    return std::string(buf);
}

//Returns the generated SHA512 hash of the given string
char* Sha512(char* text)
{
    std::string output = sha512(std::string(text));
    char* result = (char*)output.c_str();
    size_t allocSize = sizeof(result) * output.length();
    if (allocSize > 0) {
        strcpy(b4aOutputBuffer, result);
    }
    return b4aOutputBuffer;
}
 

Attachments

  • LICENSE.txt
    1.7 KB · Views: 283
  • Sha512.zip
    367.9 KB · Views: 317
Last edited:

MathiasM

Active Member
Licensed User
Hell

thanks a bunch for this library, is there a possibility to make this work in B4J?
When I import the lib, and try your test, I get this error:
cIyi80R.png


Or should I use NLG to 'compile' this for B4J?

Thanks
 

wonder

Expert
Licensed User
Longtime User
This is a B4A library which unfortunately doesn't work in B4J.

NLG targets Android, so it won't be possible (most likely) to have it working in B4J. There is, however a fork of NLG that targeted B4J, but I can't remember who was developing it.
 
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