/* This functions builds an index of the keyring into a separate file
with the name keyring.ext.idx. It contains the offset of all public-
and public subkeys. The format of the file is:
--------
4 octets offset of the packet
8 octets keyid
20 octets fingerprint
--------
We store the keyid and the fingerprint due to the fact we can't get
the keyid from a v3 fingerprint directly.
*/
static int
keydb_idx_build( const char * file )
{
cdk_packet_t pkt;
cdk_stream_t inp, out = NULL;
byte buf[8], fpr[20];
char * fname;
u32 keyid[2];
int rc, pos;
if( !file )
return CDK_Inv_Value;
pkt = cdk_calloc( 1, sizeof * pkt );
if( !pkt )
return CDK_Out_Of_Core;
fname = keydb_idx_mkname( file );
if( !fname ) {
rc = CDK_Out_Of_Core;
goto leave;
}
rc = cdk_stream_open( file, &inp );
if( !rc )
rc = cdk_stream_create( fname, &out );
if( rc )
goto leave;
while( !cdk_stream_eof( inp ) ) {
pos = cdk_stream_tell( inp );
rc = cdk_pkt_read( inp, pkt );
if( rc )
break;
if( pkt->pkttype == CDK_PKT_PUBLIC_KEY
|| pkt->pkttype == CDK_PKT_PUBLIC_SUBKEY ) {
_cdk_u32tobuf( pos, buf );
cdk_stream_write( out, buf, 4 );
cdk_pk_get_keyid( pkt->pkt.public_key, keyid );
_cdk_u32tobuf( keyid[0], buf );
_cdk_u32tobuf( keyid[1], buf + 4 );
cdk_stream_write( out, buf, 8 );
cdk_pk_get_fingerprint( pkt->pkt.public_key, fpr );
cdk_stream_write( out, fpr, 20 );
}
cdk_pkt_free( pkt );
cdk_pkt_init( pkt );
}
cdk_stream_close( out );
leave:
cdk_stream_close( inp );
cdk_free( fname );
cdk_free( pkt );
return rc;
}
static cdk_error_t
file_verify_clearsign (cdk_ctx_t hd, const char *file, const char *output)
{
cdk_stream_t inp = NULL, out = NULL, tmp = NULL;
digest_hd_st md;
char buf[512], chk[512];
const char *s;
int i, is_signed = 0, nbytes;
int digest_algo = 0;
int err;
cdk_error_t rc;
memset(&md, 0, sizeof(md));
if (output)
{
rc = cdk_stream_create (output, &out);
if (rc)
return rc;
}
rc = cdk_stream_open (file, &inp);
if (rc)
{
if (output)
cdk_stream_close (out);
return rc;
}
s = "-----BEGIN PGP SIGNED MESSAGE-----";
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (!strncmp (buf, s, strlen (s)))
{
is_signed = 1;
break;
}
}
if (cdk_stream_eof (inp) && !is_signed)
{
rc = CDK_Armor_Error;
goto leave;
}
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (nbytes == 1) /* Empty line */
break;
else if (!strncmp (buf, "Hash: ", 6))
{
for (i = 0; digest_table[i].name; i++)
{
if (!strcmp (buf + 6, digest_table[i].name))
{
digest_algo = digest_table[i].algo;
break;
}
}
}
}
if (digest_algo && _gnutls_hash_get_algo_len (digest_algo) <= 0)
{
rc = CDK_Inv_Algo;
goto leave;
}
if (!digest_algo)
digest_algo = GNUTLS_DIG_MD5;
err = _gnutls_hash_init (&md, digest_algo);
if (err < 0)
{
rc = map_gnutls_error (err);
goto leave;
}
s = "-----BEGIN PGP SIGNATURE-----";
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (!strncmp (buf, s, strlen (s)))
break;
else
{
cdk_stream_peek (inp, (byte *) chk, DIM (chk) - 1);
i = strncmp (chk, s, strlen (s));
if (strlen (buf) == 0 && i == 0)
continue; /* skip last '\n' */
_cdk_trim_string (buf, i == 0 ? 0 : 1);
_gnutls_hash (&md, buf, strlen (buf));
}
if (!strncmp (buf, "- ", 2)) /* FIXME: handle it recursive. */
memmove (buf, buf + 2, nbytes - 2);
if (out)
{
if (strstr (buf, "\r\n"))
buf[strlen (buf) - 2] = '\0';
cdk_stream_write (out, buf, strlen (buf));
_cdk_stream_puts (out, _cdk_armor_get_lineend ());
}
}
/* We create a temporary stream object to store the
signature data in there. */
rc = cdk_stream_tmp_new (&tmp);
if (rc)
goto leave;
s = "-----BEGIN PGP SIGNATURE-----\n";
_cdk_stream_puts (tmp, s);
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (nbytes < (int) (DIM (buf) - 3))
{
buf[nbytes - 1] = '\n';
buf[nbytes] = '\0';
}
cdk_stream_write (tmp, buf, nbytes);
}
/* FIXME: This code is not very elegant. */
cdk_stream_tmp_set_mode (tmp, STREAMCTL_READ);
cdk_stream_seek (tmp, 0);
cdk_stream_set_armor_flag (tmp, 0);
cdk_stream_read (tmp, NULL, 0);
/* the digest handle will be closed there. */
rc = _cdk_proc_packets (hd, tmp, NULL, NULL, NULL, &md);
leave:
_gnutls_hash_deinit (&md, NULL);
cdk_stream_close (out);
cdk_stream_close (tmp);
cdk_stream_close (inp);
return rc;
}
/**
* cdk_keygen_save: save the generated keys to disk
* @hd: the keygen object
* @pub: name of the file to store the public key
* @sec: name of the file to store the secret key
*
**/
cdk_error_t
cdk_keygen_save( cdk_keygen_ctx_t hd, const char * pubf, const char * secf )
{
cdk_stream_t out = NULL;
CDK_PACKET pkt;
int rc;
hd->key[0].pk = pk_create( hd, 0 );
if( !hd->key[0].pk )
return CDK_Inv_Packet;
hd->key[0].sk = sk_create( hd, 0 );
if( !hd->key[0].sk )
return CDK_Inv_Packet;
hd->id = uid_create( hd );
if( !hd->id )
return CDK_Inv_Packet;
hd->sig = sig_self_create( hd );
if( !hd->sig )
return CDK_Inv_Packet;
rc = cdk_stream_create( pubf, &out );
if( rc )
return rc;
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_PUBLIC_KEY;
pkt.pkt.public_key = hd->key[0].pk;
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_USER_ID;
pkt.pkt.user_id = hd->id;
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_SIGNATURE;
pkt.pkt.signature = hd->sig;
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
if( hd->key[1].algo ) {
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_PUBLIC_SUBKEY;
pkt.pkt.public_key = hd->key[1].pk = pk_create( hd, 1 );
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_SIGNATURE;
pkt.pkt.signature = sig_subkey_create( hd );
rc = cdk_pkt_write( out, &pkt );
cdk_pkt_free( &pkt );
if( rc )
goto fail;
}
cdk_stream_close( out );
out = NULL;
rc = cdk_stream_create( secf, &out );
if( rc )
goto fail;
if( hd->protect ) {
rc = cdk_sk_protect( hd->key[0].sk, hd->pass );
if( rc )
goto fail;
}
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_SECRET_KEY;
pkt.pkt.secret_key = hd->key[0].sk;
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_USER_ID;
pkt.pkt.user_id = hd->id;
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_SIGNATURE;
pkt.pkt.signature = hd->sig;
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
if( hd->key[1].algo ) {
hd->key[1].sk = sk_create( hd, 1 );
if( hd->protect && (rc = cdk_sk_protect( hd->key[1].sk, hd->pass )) )
goto fail;
cdk_pkt_init( &pkt );
pkt.pkttype = CDK_PKT_SECRET_SUBKEY;
pkt.pkt.secret_key = hd->key[1].sk;
rc = cdk_pkt_write( out, &pkt );
if( rc )
goto fail;
}
fail:
cdk_stream_close( out );
return rc;
}
