C++ (Cpp) EC_FillParams Examples

Example #1

File: ecdecode.c Project: subsevenx2001/gecko-dev

SECStatus
EC_DecodeParams(const SECItem *encodedParams, ECParams **ecparams)
{
    PLArenaPool *arena;
    ECParams *params;
    SECStatus rv = SECFailure;

    /* Initialize an arena for the ECParams structure */
    if (!(arena = PORT_NewArena(NSS_FREEBL_DEFAULT_CHUNKSIZE)))
        return SECFailure;

    params = (ECParams *)PORT_ArenaZAlloc(arena, sizeof(ECParams));
    if (!params) {
        PORT_FreeArena(arena, PR_TRUE);
        return SECFailure;
    }

    /* Copy the encoded params */
    SECITEM_AllocItem(arena, &(params->DEREncoding),
                      encodedParams->len);
    memcpy(params->DEREncoding.data, encodedParams->data, encodedParams->len);

    /* Fill out the rest of the ECParams structure based on
     * the encoded params
     */
    rv = EC_FillParams(arena, encodedParams, params);
    if (rv == SECFailure) {
        PORT_FreeArena(arena, PR_TRUE);
        return SECFailure;
    } else {
        *ecparams = params;
        ;
        return SECSuccess;
    }
}

Example #2

File: fbectest.c Project: Wafflespeanut/gecko-dev

SECStatus
ectest_ecdh_kat(ECDH_KAT *kat)
{
    ECCurveName curve = kat->curve;
    ECParams ecParams = { 0 };
    ECPrivateKey *ecPriv = NULL;
    SECItem theirKey = { siBuffer, NULL, 0 };
    SECStatus rv = SECFailure;
    PLArenaPool *arena = NULL;
    SECItem seed = { siBuffer, NULL, 0 };
    SECItem answer = { siBuffer, NULL, 0 };
    SECItem answer2 = { siBuffer, NULL, 0 };
    SECItem derived = { siBuffer, NULL, 0 };
    SECItem ecEncodedParams = { siBuffer, NULL, 0 };
    int i;

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (!arena) {
        return SECFailure;
    }

    rv = SECU_ecName2params(curve, &ecEncodedParams);
    if (rv != SECSuccess) {
        goto cleanup;
    }
    EC_FillParams(arena, &ecEncodedParams, &ecParams);

    if (kat->our_pubhex) {
        SECU_HexString2SECItem(arena, &answer, kat->our_pubhex);
    }
    SECU_HexString2SECItem(arena, &seed, kat->privhex);
    rv = EC_NewKeyFromSeed(&ecParams, &ecPriv, seed.data, seed.len);
    if (rv != SECSuccess) {
        rv = SECFailure;
        goto cleanup;
    }
    if (kat->our_pubhex) {
        if (SECITEM_CompareItem(&answer, &ecPriv->publicValue) != SECEqual) {
            rv = SECFailure;
            goto cleanup;
        }
    }

    SECU_HexString2SECItem(arena, &theirKey, kat->their_pubhex);
    SECU_HexString2SECItem(arena, &answer2, kat->common_key);

    rv = EC_ValidatePublicKey(&ecParams, &theirKey);
    if (rv != SECSuccess) {
        printf("EC_ValidatePublicKey failed\n");
        goto cleanup;
    }

    for (i = 0; i < kat->iterations; ++i) {
        rv = ECDH_Derive(&theirKey, &ecParams, &ecPriv->privateValue, PR_TRUE, &derived);
        if (rv != SECSuccess) {
            rv = SECFailure;
            goto cleanup;
        }
        rv = SECITEM_CopyItem(ecParams.arena, &theirKey, &ecPriv->privateValue);
        if (rv != SECSuccess) {
            goto cleanup;
        }
        rv = SECITEM_CopyItem(ecParams.arena, &ecPriv->privateValue, &derived);
        if (rv != SECSuccess) {
            goto cleanup;
        }
        SECITEM_FreeItem(&derived, PR_FALSE);
    }

    if (SECITEM_CompareItem(&answer2, &ecPriv->privateValue) != SECEqual) {
        printf("expected: ");
        printBuf(&answer2);
        printf("derived:  ");
        printBuf(&ecPriv->privateValue);
        rv = SECFailure;
        goto cleanup;
    }

cleanup:
    SECITEM_FreeItem(&ecEncodedParams, PR_FALSE);
    PORT_FreeArena(arena, PR_FALSE);
    if (ecPriv) {
        PORT_FreeArena(ecPriv->ecParams.arena, PR_FALSE);
    }
    if (derived.data) {
        SECITEM_FreeItem(&derived, PR_FALSE);
    }
    return rv;
}