Ejemplos de mbedtls_ecp_check_privkey en C++ (Cpp)

Ejemplo n.º 1

Archivo: PKey.cpp Proyecto: 540513310/fibjs

result_t PKey::isPrivate(bool &retVal)
{
    mbedtls_pk_type_t type = mbedtls_pk_get_type(&m_key);

    if (type == MBEDTLS_PK_RSA)
    {
        retVal = mbedtls_rsa_check_privkey(mbedtls_pk_rsa(m_key)) == 0;
        return 0;
    }

    if (type == MBEDTLS_PK_ECKEY)
    {
        mbedtls_ecp_keypair *ecp = mbedtls_pk_ec(m_key);
        retVal = mbedtls_ecp_check_privkey(&ecp->grp, &ecp->d) == 0;
        return 0;
    }

    return CHECK_ERROR(CALL_E_INVALID_CALL);
}

Ejemplo n.º 2

Archivo: pkparse.c Proyecto: Alcaro/RetroArch

/*
 * Parse a SEC1 encoded private EC key
 */
static int pk_parse_key_sec1_der( mbedtls_ecp_keypair *eck,
                                  const unsigned char *key,
                                  size_t keylen )
{
    int ret;
    int version, pubkey_done;
    size_t len;
    mbedtls_asn1_buf params;
    unsigned char *p = (unsigned char *) key;
    unsigned char *end = p + keylen;
    unsigned char *end2;

    /*
     * RFC 5915, or SEC1 Appendix C.4
     *
     * ECPrivateKey ::= SEQUENCE {
     *      version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
     *      privateKey     OCTET STRING,
     *      parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
     *      publicKey  [1] BIT STRING OPTIONAL
     *    }
     */
    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
    {
        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
    }

    end = p + len;

    if( ( ret = mbedtls_asn1_get_int( &p, end, &version ) ) != 0 )
        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );

    if( version != 1 )
        return( MBEDTLS_ERR_PK_KEY_INVALID_VERSION );

    if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );

    if( ( ret = mbedtls_mpi_read_binary( &eck->d, p, len ) ) != 0 )
    {
        mbedtls_ecp_keypair_free( eck );
        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
    }

    p += len;

    pubkey_done = 0;
    if( p != end )
    {
        /*
         * Is 'parameters' present?
         */
        if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
                        MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) == 0 )
        {
            if( ( ret = pk_get_ecparams( &p, p + len, &params) ) != 0 ||
                ( ret = pk_use_ecparams( &params, &eck->grp )  ) != 0 )
            {
                mbedtls_ecp_keypair_free( eck );
                return( ret );
            }
        }
        else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
        {
            mbedtls_ecp_keypair_free( eck );
            return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
        }

        /*
         * Is 'publickey' present? If not, or if we can't read it (eg because it
         * is compressed), create it from the private key.
         */
        if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
                        MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ) == 0 )
        {
            end2 = p + len;

            if( ( ret = mbedtls_asn1_get_bitstring_null( &p, end2, &len ) ) != 0 )
                return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );

            if( p + len != end2 )
                return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT +
                        MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );

            if( ( ret = pk_get_ecpubkey( &p, end2, eck ) ) == 0 )
                pubkey_done = 1;
            else
            {
                /*
                 * The only acceptable failure mode of pk_get_ecpubkey() above
                 * is if the point format is not recognized.
                 */
                if( ret != MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE )
                    return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT );
            }
        }
        else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
        {
            mbedtls_ecp_keypair_free( eck );
            return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
        }
    }

    if( ! pubkey_done &&
        ( ret = mbedtls_ecp_mul( &eck->grp, &eck->Q, &eck->d, &eck->grp.G,
                                                      NULL, NULL ) ) != 0 )
    {
        mbedtls_ecp_keypair_free( eck );
        return( MBEDTLS_ERR_PK_KEY_INVALID_FORMAT + ret );
    }

    if( ( ret = mbedtls_ecp_check_privkey( &eck->grp, &eck->d ) ) != 0 )
    {
        mbedtls_ecp_keypair_free( eck );
        return( ret );
    }

    return( 0 );
}