C++ (Cpp) crypto_hash_sha512_init 예제들

예제 #1

파일: hmac_hmacsha512.c 프로젝트: 0njzy0/shadowsocks-libev

int
crypto_auth_hmacsha512_init(crypto_auth_hmacsha512_state *state,
                            const unsigned char *key,
                            size_t keylen)
{
    unsigned char pad[128];
    unsigned char khash[64];
    size_t        i;

    if (keylen > 128) {
        crypto_hash_sha512_init(&state->ictx);
        crypto_hash_sha512_update(&state->ictx, key, keylen);
        crypto_hash_sha512_final(&state->ictx, khash);
        key = khash;
        keylen = 64;
    }
    crypto_hash_sha512_init(&state->ictx);
    memset(pad, 0x36, 128);
    for (i = 0; i < keylen; i++) {
        pad[i] ^= key[i];
    }
    crypto_hash_sha512_update(&state->ictx, pad, 128);

    crypto_hash_sha512_init(&state->octx);
    memset(pad, 0x5c, 128);
    for (i = 0; i < keylen; i++) {
        pad[i] ^= key[i];
    }
    crypto_hash_sha512_update(&state->octx, pad, 128);

    sodium_memzero((void *) pad, sizeof pad);
    sodium_memzero((void *) khash, sizeof khash);

    return 0;
}

예제 #2

파일: sign.c 프로젝트: chrish42/libsodium

int
crypto_sign_detached(unsigned char *sig, unsigned long long *siglen,
                     const unsigned char *m, unsigned long long mlen,
                     const unsigned char *sk)
{
    crypto_hash_sha512_state hs;
    unsigned char pk[32];
    unsigned char az[64];
    unsigned char nonce[64];
    unsigned char hram[64];
    ge_p3 R;

    memmove(pk, sk + 32, 32);

    crypto_hash_sha512(az, sk, 32);
    az[0] &= 248;
    az[31] &= 63;
    az[31] |= 64;

    crypto_hash_sha512_init(&hs);
    crypto_hash_sha512_update(&hs, az + 32, 32);
    crypto_hash_sha512_update(&hs, m, mlen);
    crypto_hash_sha512_final(&hs, nonce);

    memmove(sig + 32, pk, 32);

    sc_reduce(nonce);
    ge_scalarmult_base(&R, nonce);
    ge_p3_tobytes(sig, &R);

    crypto_hash_sha512_init(&hs);
    crypto_hash_sha512_update(&hs, sig, 64);
    crypto_hash_sha512_update(&hs, m, mlen);
    crypto_hash_sha512_final(&hs, hram);

    sc_reduce(hram);
    sc_muladd(sig + 32, hram, az, nonce);

    sodium_memzero(az, sizeof az);
    sodium_memzero(nonce, sizeof nonce);

    if (siglen != NULL) {
        *siglen = 64U;
    }
    return 0;
}

예제 #3

파일: obsolete.c 프로젝트: 95ulisse/libsodium

int crypto_sign_edwards25519sha512batch(unsigned char *sm,
                                        unsigned long long *smlen_p,
                                        const unsigned char *m,
                                        unsigned long long mlen,
                                        const unsigned char *sk)
{
    crypto_hash_sha512_state hs;
    unsigned char nonce[64];
    unsigned char hram[64];
    unsigned char sig[64];
    ge_p3 A;
    ge_p3 R;

    crypto_hash_sha512_init(&hs);
    crypto_hash_sha512_update(&hs, sk + 32, 32);
    crypto_hash_sha512_update(&hs, m, mlen);
    crypto_hash_sha512_final(&hs, nonce);
    ge_scalarmult_base(&A, sk);
    ge_p3_tobytes(sig + 32, &A);
    sc_reduce(nonce);
    ge_scalarmult_base(&R, nonce);
    ge_p3_tobytes(sig, &R);
    crypto_hash_sha512_init(&hs);
    crypto_hash_sha512_update(&hs, sig, 32);
    crypto_hash_sha512_update(&hs, m, mlen);
    crypto_hash_sha512_final(&hs, hram);
    sc_reduce(hram);
    sc_muladd(sig + 32, hram, nonce, sk);
    sodium_memzero(hram, sizeof hram);
    memmove(sm + 32, m, (size_t) mlen);
    memcpy(sm, sig, 32);
    memcpy(sm + 32 + mlen, sig + 32, 32);
    *smlen_p = mlen + 64U;

    return 0;
}

예제 #4

파일: sign.c 프로젝트: Asunaya/RefinedGunz

void
_crypto_sign_ed25519_ref10_hinit(crypto_hash_sha512_state *hs, int prehashed)
{
    static const unsigned char DOM2PREFIX[32 + 2] = {
        'S', 'i', 'g', 'E', 'd', '2', '5', '5', '1', '9', ' ',
        'n', 'o', ' ',
        'E', 'd', '2', '5', '5', '1', '9', ' ',
        'c', 'o', 'l', 'l', 'i', 's', 'i', 'o', 'n', 's', 1, 0
    };

    crypto_hash_sha512_init(hs);
    if (prehashed) {
        crypto_hash_sha512_update(hs, DOM2PREFIX, sizeof DOM2PREFIX);
    }
}

예제 #5

파일: open.c 프로젝트: SpiderOak/libsodium

int
crypto_sign_verify_detached(const unsigned char *sig, const unsigned char *m,
                            unsigned long long mlen, const unsigned char *pk)
{
    crypto_hash_sha512_state hs;
    unsigned char h[64];
    unsigned char rcheck[32];
    unsigned int  i;
    unsigned char d = 0;
    ge_p3 A;
    ge_p2 R;

#ifdef ED25519_PREVENT_MALLEABILITY
    if (crypto_sign_check_S_lt_l(sig + 32) != 0) {
        return -1;
    }
#else
    if (sig[63] & 224) {
        return -1;
    }
#endif
    if (ge_frombytes_negate_vartime(&A, pk) != 0) {
        return -1;
    }
    for (i = 0; i < 32; ++i) {
        d |= pk[i];
    }
    if (d == 0) {
        return -1;
    }
    crypto_hash_sha512_init(&hs);
    crypto_hash_sha512_update(&hs, sig, 32);
    crypto_hash_sha512_update(&hs, pk, 32);
    crypto_hash_sha512_update(&hs, m, mlen);
    crypto_hash_sha512_final(&hs, h);
    sc_reduce(h);

    ge_double_scalarmult_vartime(&R, h, &A, sig + 32);
    ge_tobytes(rcheck, &R);

    return crypto_verify_32(rcheck, sig) | (-(rcheck - sig == 0)) |
           sodium_memcmp(sig, rcheck, 32);
}

예제 #6

파일: sign_ed25519.c 프로젝트: Asunaya/RefinedGunz

int
crypto_sign_ed25519ph_init(crypto_sign_ed25519ph_state *state)
{
    crypto_hash_sha512_init(&state->hs);
    return 0;
}