Exemplos de parse_signature_v4_packet em C++ (Cpp)

Exemplo n.º 1

Arquivo: update_crypto.c Projeto: BossKing/vlc

static int parse_signature_packet( signature_packet_t *p_sig,
                                   const uint8_t *p_buf, size_t i_packet_len )
{
    if( !i_packet_len ) /* 1st sanity check, we need at least the version */
        return VLC_EGENERIC;

    p_sig->version = *p_buf++;

    size_t i_read;
    switch( p_sig->version )
    {
        case 3:
            i_read = parse_signature_v3_packet( p_sig, p_buf, i_packet_len );
            break;
        case 4:
            p_sig->specific.v4.hashed_data = NULL;
            p_sig->specific.v4.unhashed_data = NULL;
            i_read = parse_signature_v4_packet( p_sig, p_buf, i_packet_len );
            break;
        default:
            return VLC_EGENERIC;
    }

    if( i_read == 0 ) /* signature packet parsing has failed */
        goto error;

    if( p_sig->public_key_algo != GCRY_PK_DSA && p_sig->public_key_algo != GCRY_PK_RSA )
        goto error;

    switch( p_sig->type )
    {
        case BINARY_SIGNATURE:
        case TEXT_SIGNATURE:
        case GENERIC_KEY_SIGNATURE:
        case PERSONA_KEY_SIGNATURE:
        case CASUAL_KEY_SIGNATURE:
        case POSITIVE_KEY_SIGNATURE:
            break;
        default:
            goto error;
    }

    p_buf--; /* rewind to the version byte */
    p_buf += i_read;

    if( p_sig->public_key_algo == GCRY_PK_DSA ) {
        READ_MPI(p_sig->algo_specific.dsa.r, 256);
        READ_MPI(p_sig->algo_specific.dsa.s, 256);
    } else if ( p_sig->public_key_algo == GCRY_PK_RSA ) {
        READ_MPI(p_sig->algo_specific.rsa.s, 4096);
    } else
        goto error;

    assert( i_read == i_packet_len );
    if( i_read < i_packet_len ) /* some extra data, hm ? */
        goto error;

    return VLC_SUCCESS;

error:

    if( p_sig->version == 4 )
    {
        free( p_sig->specific.v4.hashed_data );
        free( p_sig->specific.v4.unhashed_data );
    }

    return VLC_EGENERIC;
}

Exemplo n.º 2

Arquivo: UpdateCrypto.cpp Projeto: hongzuL/TortoiseGit

static int parse_signature_packet(signature_packet_t *p_sig, const uint8_t *p_buf, size_t i_packet_len)
{
	if (!i_packet_len) /* 1st sanity check, we need at least the version */
		return -1;

	p_sig->version = *p_buf++;

	size_t i_read;
	switch (p_sig->version)
	{
		case 3:
			i_read = parse_signature_v3_packet(p_sig, p_buf, i_packet_len);
			break;
		case 4:
			p_sig->specific.v4.hashed_data = nullptr;
			p_sig->specific.v4.unhashed_data = nullptr;
			i_read = parse_signature_v4_packet(p_sig, p_buf, i_packet_len);
			break;
		default:
			return -1;
	}

	if (i_read == 0) /* signature packet parsing has failed */
		goto error;

	if (!map_algo(p_sig->public_key_algo))
		goto error;

	if (!map_digestalgo(p_sig->digest_algo))
		goto error;

	switch (p_sig->type)
	{
		case BINARY_SIGNATURE:
		case TEXT_SIGNATURE:
		case GENERIC_KEY_SIGNATURE:
		case PERSONA_KEY_SIGNATURE:
		case CASUAL_KEY_SIGNATURE:
		case POSITIVE_KEY_SIGNATURE:
			break;
		default:
			goto error;
	}

	p_buf--; /* rewind to the version byte */
	p_buf += i_read;

	if (p_sig->public_key_algo == PUBLIC_KEY_ALGO_DSA)
	{
		READ_MPI(p_sig->algo_specific.dsa.r, 160);
		READ_MPI(p_sig->algo_specific.dsa.s, 160);
	}
	else if (p_sig->public_key_algo == PUBLIC_KEY_ALGO_RSA)
		READ_MPI(p_sig->algo_specific.rsa.s, 4096);
	else
		goto error;

	if (i_read != i_packet_len)
		goto error;

	return 0;

error:
	if (p_sig->version == 4)
	{
		free(p_sig->specific.v4.hashed_data);
		free(p_sig->specific.v4.unhashed_data);
	}

	return -1;
}