C++ (Cpp) v128_xor Examples

Example #1

/*
 * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with
 * the offset
 */
err_status_t aes_icm_openssl_set_iv (aes_icm_ctx_t *c, void *iv, int dir)
{
    const EVP_CIPHER *evp;
    v128_t *nonce = (v128_t*)iv;

    debug_print(mod_aes_icm, "setting iv: %s", v128_hex_string(nonce));

    v128_xor(&c->counter, &c->offset, nonce);

    debug_print(mod_aes_icm, "set_counter: %s", v128_hex_string(&c->counter));

    switch (c->key_size) {
    case AES_256_KEYSIZE:
        evp = EVP_aes_256_ctr();
        break;
    case AES_192_KEYSIZE:
        evp = EVP_aes_192_ctr();
        break;
    case AES_128_KEYSIZE:
        evp = EVP_aes_128_ctr();
        break;
    default:
        return err_status_bad_param;
        break;
    }

    if (!EVP_EncryptInit_ex(&c->ctx, evp,
                            NULL, c->key.v8, c->counter.v8)) {
        return err_status_fail;
    } else {
        return err_status_ok;
    }
}

Example #2

err_status_t
aes_icm_set_iv(aes_icm_ctx_t *c, void *iv) {
    v128_t *nonce = iv;

    debug_print(mod_aes_icm,
                "setting iv: %s", v128_hex_string(nonce));

    v128_xor(&c->counter, &c->offset, nonce);

    debug_print(mod_aes_icm,
                "set_counter: %s", v128_hex_string(&c->counter));

    /* indicate that the keystream_buffer is empty */
    c->bytes_in_buffer = 0;

    return err_status_ok;
}

Example #3

File: aes_icm.c Project: Distrotech/libsrtp

static srtp_err_status_t srtp_aes_icm_set_iv (srtp_aes_icm_ctx_t *c, uint8_t *iv, int direction)
{
    v128_t nonce;

    /* set nonce (for alignment) */
    v128_copy_octet_string(&nonce, iv);

    debug_print(srtp_mod_aes_icm,
                "setting iv: %s", v128_hex_string(&nonce));

    v128_xor(&c->counter, &c->offset, &nonce);

    debug_print(srtp_mod_aes_icm,
                "set_counter: %s", v128_hex_string(&c->counter));

    /* indicate that the keystream_buffer is empty */
    c->bytes_in_buffer = 0;

    return srtp_err_status_ok;
}

Example #4

File: aes_icm_ossl.c Project: PlexChat/libsrtp

/*
 * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with
 * the offset
 */
static srtp_err_status_t srtp_aes_icm_openssl_set_iv (void *cv, uint8_t *iv, srtp_cipher_direction_t dir)
{
    srtp_aes_icm_ctx_t *c = (srtp_aes_icm_ctx_t *)cv;
    v128_t nonce;

    /* set nonce (for alignment) */
    v128_copy_octet_string(&nonce, iv);

    debug_print(srtp_mod_aes_icm, "setting iv: %s", v128_hex_string(&nonce));

    v128_xor(&c->counter, &c->offset, &nonce);

    debug_print(srtp_mod_aes_icm, "set_counter: %s", v128_hex_string(&c->counter));

    if (!EVP_EncryptInit_ex(c->ctx, NULL,
                            NULL, NULL, c->counter.v8)) {
        return srtp_err_status_fail;
    } else {
        return srtp_err_status_ok;
    }
}

Example #5

File: aes_icm_ossl.c Project: airtimemedia/libsrtp

/*
 * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with
 * the offset
 */
err_status_t aes_icm_openssl_set_iv (aes_icm_ctx_t *c, void *iv, int dir)
{
    const EVP_CIPHER *evp;
    v128_t nonce;

    /* set nonce (for alignment) */
    v128_copy_octet_string(&nonce, iv);

    debug_print(mod_aes_icm, "setting iv: %s", v128_hex_string(&nonce));

    v128_xor(&c->counter, &c->offset, &nonce);

    debug_print(mod_aes_icm, "set_counter: %s", v128_hex_string(&c->counter));

    switch (c->key_size) {
    case AES_256_KEYSIZE:
        evp = EVP_aes_256_ctr();
        break;
#ifndef BORINGSSL
    case AES_192_KEYSIZE:
        evp = EVP_aes_192_ctr();
        break;
#endif
    case AES_128_KEYSIZE:
        evp = EVP_aes_128_ctr();
        break;
    default:
        return err_status_bad_param;
        break;
    }

    if (!EVP_EncryptInit_ex(&c->ctx, evp,
                            NULL, c->key.v8, c->counter.v8)) {
        return err_status_fail;
    } else {
        return err_status_ok;
    }
}