static cdk_error_t
read_pubkey_enc (cdk_stream_t inp, size_t pktlen, cdk_pkt_pubkey_enc_t pke)
{
size_t i, nenc;
if (!inp || !pke)
return CDK_Inv_Value;
if (DEBUG_PKT)
_cdk_log_debug ("read_pubkey_enc: %d octets\n", pktlen);
if (pktlen < 12)
return CDK_Inv_Packet;
pke->version = cdk_stream_getc (inp);
if (pke->version < 2 || pke->version > 3)
return CDK_Inv_Packet;
pke->keyid[0] = read_32 (inp);
pke->keyid[1] = read_32 (inp);
if (!pke->keyid[0] && !pke->keyid[1])
pke->throw_keyid = 1; /* RFC2440 "speculative" keyID */
pke->pubkey_algo = _pgp_pub_algo_to_cdk (cdk_stream_getc (inp));
nenc = cdk_pk_get_nenc (pke->pubkey_algo);
if (!nenc)
return CDK_Inv_Algo;
for (i = 0; i < nenc; i++)
{
cdk_error_t rc = read_mpi (inp, &pke->mpi[i], 0);
if (rc)
return rc;
}
return 0;
}
cdk_error_t _cdk_copy_pk_to_sk(cdk_pkt_pubkey_t pk, cdk_pkt_seckey_t sk)
{
if (!pk || !sk)
return CDK_Inv_Value;
sk->version = pk->version;
sk->expiredate = pk->expiredate;
sk->pubkey_algo = _pgp_pub_algo_to_cdk(pk->pubkey_algo);
sk->has_expired = pk->has_expired;
sk->is_revoked = pk->is_revoked;
sk->main_keyid[0] = pk->main_keyid[0];
sk->main_keyid[1] = pk->main_keyid[1];
sk->keyid[0] = pk->keyid[0];
sk->keyid[1] = pk->keyid[1];
return 0;
}
static cdk_error_t
read_public_key (cdk_stream_t inp, size_t pktlen, cdk_pkt_pubkey_t pk)
{
size_t i, ndays, npkey;
if (!inp || !pk)
return CDK_Inv_Value;
if (DEBUG_PKT)
_cdk_log_debug ("read_public_key: %d octets\n", pktlen);
pk->is_invalid = 1; /* default to detect missing self signatures */
pk->is_revoked = 0;
pk->has_expired = 0;
pk->version = cdk_stream_getc (inp);
if (pk->version < 2 || pk->version > 4)
return CDK_Inv_Packet_Ver;
pk->timestamp = read_32 (inp);
if (pk->version < 4)
{
ndays = read_16 (inp);
if (ndays)
pk->expiredate = pk->timestamp + ndays * 86400L;
}
pk->pubkey_algo = _pgp_pub_algo_to_cdk (cdk_stream_getc (inp));
npkey = cdk_pk_get_npkey (pk->pubkey_algo);
if (!npkey)
{
gnutls_assert ();
_cdk_log_debug ("invalid public key algorithm %d\n", pk->pubkey_algo);
return CDK_Inv_Algo;
}
for (i = 0; i < npkey; i++)
{
cdk_error_t rc = read_mpi (inp, &pk->mpi[i], 0);
if (rc)
return rc;
}
/* This value is just for the first run and will be
replaced with the actual key flags from the self signature. */
pk->pubkey_usage = 0;
return 0;
}
static cdk_error_t
read_onepass_sig (cdk_stream_t inp, size_t pktlen, cdk_pkt_onepass_sig_t sig)
{
if (!inp || !sig)
return CDK_Inv_Value;
if (DEBUG_PKT)
_cdk_log_debug ("read_onepass_sig: %d octets\n", pktlen);
if (pktlen != 13)
return CDK_Inv_Packet;
sig->version = cdk_stream_getc (inp);
if (sig->version != 3)
return CDK_Inv_Packet_Ver;
sig->sig_class = cdk_stream_getc (inp);
sig->digest_algo = _pgp_hash_algo_to_gnutls (cdk_stream_getc (inp));
sig->pubkey_algo = _pgp_pub_algo_to_cdk (cdk_stream_getc (inp));
sig->keyid[0] = read_32 (inp);
sig->keyid[1] = read_32 (inp);
sig->last = cdk_stream_getc (inp);
return 0;
}
static cdk_error_t
read_signature (cdk_stream_t inp, size_t pktlen, cdk_pkt_signature_t sig)
{
size_t nbytes;
size_t i, size, nsig;
cdk_error_t rc;
if (!inp || !sig)
return CDK_Inv_Value;
if (DEBUG_PKT)
_cdk_log_debug ("read_signature: %d octets\n", pktlen);
if (pktlen < 16)
return CDK_Inv_Packet;
sig->version = cdk_stream_getc (inp);
if (sig->version < 2 || sig->version > 4)
return CDK_Inv_Packet_Ver;
sig->flags.exportable = 1;
sig->flags.revocable = 1;
if (sig->version < 4)
{
if (cdk_stream_getc (inp) != 5)
return CDK_Inv_Packet;
sig->sig_class = cdk_stream_getc (inp);
sig->timestamp = read_32 (inp);
sig->keyid[0] = read_32 (inp);
sig->keyid[1] = read_32 (inp);
sig->pubkey_algo = _pgp_pub_algo_to_cdk (cdk_stream_getc (inp));
sig->digest_algo = _pgp_hash_algo_to_gnutls (cdk_stream_getc (inp));
sig->digest_start[0] = cdk_stream_getc (inp);
sig->digest_start[1] = cdk_stream_getc (inp);
nsig = cdk_pk_get_nsig (sig->pubkey_algo);
if (!nsig)
return CDK_Inv_Algo;
for (i = 0; i < nsig; i++)
{
rc = read_mpi (inp, &sig->mpi[i], 0);
if (rc)
return rc;
}
}
else
{
sig->sig_class = cdk_stream_getc (inp);
sig->pubkey_algo = _pgp_pub_algo_to_cdk (cdk_stream_getc (inp));
sig->digest_algo = _pgp_hash_algo_to_gnutls (cdk_stream_getc (inp));
sig->hashed_size = read_16 (inp);
size = sig->hashed_size;
sig->hashed = NULL;
while (size > 0)
{
rc = read_subpkt (inp, &sig->hashed, &nbytes);
if (rc)
return rc;
size -= nbytes;
}
sig->unhashed_size = read_16 (inp);
size = sig->unhashed_size;
sig->unhashed = NULL;
while (size > 0)
{
rc = read_subpkt (inp, &sig->unhashed, &nbytes);
if (rc)
return rc;
size -= nbytes;
}
rc = parse_sig_subpackets (sig);
if (rc)
return rc;
sig->digest_start[0] = cdk_stream_getc (inp);
sig->digest_start[1] = cdk_stream_getc (inp);
nsig = cdk_pk_get_nsig (sig->pubkey_algo);
if (!nsig)
return CDK_Inv_Algo;
for (i = 0; i < nsig; i++)
{
rc = read_mpi (inp, &sig->mpi[i], 0);
if (rc)
return rc;
}
}
return 0;
}
