trunk/Src/wptKeyCache.cpp

/* wptKeyCache.cpp- Caching for the pub- and the secring
 *      Copyright (C) 2001-2005 Timo Schulz
 *
 * This file is part of MyGPGME.
 *
 * MyGPGME is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * MyGPGME is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <windows.h>
#include <stdio.h>
#include <string.h>
#include <malloc.h>
#include <ctype.h>
#include <assert.h>

#include "w32gpgme.h"
#include "wptKeyCache.h"
#include "openpgp.h"
#include "wptNLS.h"
#include "wptErrors.h"
#include "wptW32API.h"


/* convert a binary buffer into its hex representation. */
static void
buffer_to_string (char *dst, size_t dlen, const byte *buf, size_t nbytes)
{
    char dig[3];
    size_t i;

    memset (dst, 0, dlen);
    for (i = 0; i < nbytes && dlen > 0; i++) {
        sprintf (dig, "%02X", buf[i]);
        strcat (dst, dig);
        dlen -= 2;
    }
}


/* Parse the secret keyring and retrieve some additional information
   for each key which was found. */
static void
parse_secring (gpg_keycache_t cache, const char *kid, const char *secring)
{    
    PACKET *pkt = (PACKET*)calloc (1, sizeof *pkt);
    PKT_secret_key *sk;
    gpg_iobuf_t inp;
    gpgme_error_t err;
    gpgme_key_t key;
    struct keycache_s *c=NULL;
    char keyid[16+1]; 

    inp = gpg_iobuf_open (secring);
    if (!inp) {
        safe_free (pkt);
        return;
    }
    gpg_iobuf_ioctl (inp, 3, 1, NULL);
    gpg_init_packet (pkt);
    while (gpg_parse_packet (inp, pkt) != -1) {
        if (pkt->pkttype == PKT_SECRET_KEY) {
            sk = pkt->pkt.secret_key;
            /* XXX: key IDs of card public keys are wrong! */
            _snprintf (keyid, sizeof (keyid)-1, "%08lX",
                       gpg_keyid_from_sk (sk, NULL));
            if (kid && strcmp (kid, keyid) != 0)
                goto next;
            err = gpg_keycache_find_key2 (cache, keyid, 0, &key, &c);
            if (err)
                goto next;
            c->gloflags.is_protected = sk->is_protected;
            c->gloflags.divert_to_card = sk->protect.s2k.mode==1002? 1 : 0;
            if (c->pubpart != NULL) {    
                c->pubpart->gloflags.is_protected = sk->is_protected;    
                c->pubpart->gloflags.divert_to_card = sk->protect.s2k.mode==1002? 1 : 0;
            }
        }
next:
        gpg_free_packet (pkt);
        gpg_init_packet (pkt);
    }
    safe_free (pkt);
    gpg_iobuf_close (inp);
}


/* Merge the information from the keyrings into the key cache structure. */
gpgme_error_t
keycache_prepare2 (gpg_keycache_t ctx, const char *kid,
                   const char *pubring, const char *secring)
{
    gpgme_error_t err;
    gpgme_key_t key = NULL;
    gpg_iobuf_t inp;
    PACKET *pkt = (PACKET*)calloc (1, sizeof * pkt);
    struct keycache_s *c;
    const byte *sym_prefs;
    char keyid[16+1], *id = NULL;
    int key_seen = 0;
    size_t nbytes = 0, nsym =0;

    if (secring) {
        parse_secring (ctx, kid, secring);
        if (!pubring) {
            safe_free(pkt);
            return 0;
        }
    }
    inp = gpg_iobuf_open (pubring);
    if (!inp) {
        safe_free( pkt );
        return gpg_error (GPG_ERR_KEYRING_OPEN);
    }
    gpg_iobuf_ioctl( inp, 3, 1, NULL ); /* disable cache */

    gpg_init_packet( pkt );
    while (gpg_parse_packet (inp, pkt) != -1) {
        if (pkt->pkttype == PKT_PUBLIC_KEY) {
            strcpy (keyid, "");
            key_seen = 1;
        }

        if (pkt->pkttype == PKT_SIGNATURE && pkt->pkt.signature->sig_class == 0x1F) {
            if (pkt->pkt.signature->numrevkeys == 0)
                goto next;
            _snprintf (keyid, sizeof keyid -1, "%08X", pkt->pkt.signature->keyid[1]);
            if (kid && strcmp (kid, keyid) != 0)
                goto next;
            err = gpg_keycache_find_key2 (ctx, keyid, 0, &key, &c);
            if (err)
                goto next;
            c->gloflags.has_desig_rev = 1;
        }
        if (pkt->pkttype == PKT_SIGNATURE && key_seen == 1 ) {
            sym_prefs=gpg_parse_sig_subpkt (pkt->pkt.signature->hashed,
                                            SIGSUBPKT_PREF_SYM, &nsym);
            if (sym_prefs == NULL)
                goto next;
            _snprintf (keyid, sizeof keyid - 1, "%08X", pkt->pkt.signature->keyid[1]);
            if (kid && strcmp (kid, keyid) != 0)
                goto next;
            err = gpg_keycache_find_key2 (ctx, keyid, 0, &key, &c);
            if (err)
                goto next;
            else if (nsym > 0) {
                c->sym_prefs = (unsigned char*)calloc (1, nsym+1);
                if (!c->sym_prefs)
                    return gpg_error (GPG_ERR_ENOMEM);
                memcpy (c->sym_prefs, sym_prefs, nsym);
            }
        }
        if (pkt->pkttype == PKT_USER_ID) {
            if (id)
                free (id);
            id = strdup (pkt->pkt.user_id->name);
            if (!id) {
                err = gpg_error (GPG_ERR_ENOMEM);
                goto fail;
            }
        }
        if ((pkt->pkttype == PKT_USER_ID || pkt->pkttype == PKT_ATTRIBUTE)
            && pkt->pkt.user_id->attrib_data && key) {
            PKT_user_id *id = pkt->pkt.user_id;
            c->attrib.used = 1;
            c->attrib.len = id->attrib_len;
            c->attrib.d = (unsigned char*)calloc (1, id->attrib_len + 1);
            if (!c->attrib.d) {
                err = gpg_error (GPG_ERR_ENOMEM);
                goto fail;
            }
            memcpy (c->attrib.d, id->attrib_data, id->attrib_len);
            key = NULL;
            c = NULL;
        }
next:
        gpg_free_packet (pkt);
        gpg_init_packet(pkt);
    }

fail:
    safe_free (id);
    safe_free (pkt);
    gpg_iobuf_close (inp);
    return err;
}


gpgme_error_t
gpg_keycache_prepare (gpg_keycache_t ctx, const char *pubr, const char *secr)
{
    return keycache_prepare2 (ctx, NULL, pubr, secr);
}

gpgme_error_t
gpg_keycache_prepare_single (gpg_keycache_t ctx, const char *keyid,
                               const char *pubr, const char *secr)
{
    if (!strncmp (keyid, "0x", 2))
        keyid += 2;   
    return keycache_prepare2 (ctx, keyid, pubr, secr);
}


/* Create new keycache object and return it in @r_ctx.
   Return value: 0 on success. */
gpgme_error_t
gpg_keycache_new (gpg_keycache_t *r_ctx)
{
    gpg_keycache_t ctx;
    
    if (!r_ctx)
        return gpg_error (GPG_ERR_INV_ARG);
    ctx = (gpg_keycache_t)calloc (1, sizeof *ctx);
    if (!ctx)
        return gpg_error (GPG_ERR_ENOMEM);
    ctx->secret = 0;
    ctx->pos = 0;
    *r_ctx = ctx;
    return 0;
}


/* Release keycache object @ctx. */
void
gpg_keycache_release (gpg_keycache_t ctx)
{
    struct keycache_s *c, *c2;
    
    if (!ctx)
        return;

    for (c = ctx->item; c; c = c2) {
        c2 = c->next;
        gpgme_key_release (c->key);
        c->key = NULL;
        if (c->sym_prefs)
            free (c->sym_prefs);
        c->sym_prefs = NULL;
        if (c->attrib.d)
            free (c->attrib.d);
        c->attrib.d = NULL;
        if (c->card_type)
            free (c->card_type);
        free (c);
    }
    if (ctx)
        free (ctx);
}


/* Set (progress) callback for the given keycache object.
   @ctx the keycache
   @cb  the callback function
   @cb_value1 opaque value which is passed to the callback.
   @cb_value2 see @cb_value1. */
void
gpg_keycache_set_cb (gpg_keycache_t ctx,
                     void (*cb)(void *, const char *, int, int, int),
                     void * cb_value1, int cb_value2)
{
    if (!ctx)
        return;
    ctx->cb = cb;
    ctx->cb_value = cb_value1;
    ctx->cb_value2 = cb_value2;
}


/* Add @key to the cache @ctx. @opaque return the key cache context as a void*.
   Return value: 0 on success. */
gpgme_error_t
gpg_keycache_add_key (gpg_keycache_t ctx, gpgme_key_t key, void **opaque)
{
    struct keycache_s *c, *n1;
    
    if (!ctx)
        return gpg_error (GPG_ERR_INV_ARG);
    
    c = (struct keycache_s*)calloc (1, sizeof *c);
    if (!c)
        return gpg_error (GPG_ERR_ENOMEM);
    c->gloflags.is_protected = 1; /*default: assume protection. */
    c->key = key;
    if (!ctx->item)
        ctx->item = c;
    else {
        for (n1 = ctx->item; n1 && n1->next; n1 = n1->next)
            ;
        n1->next = c;
    }
    if (opaque)
        *opaque = c;
    return 0;
}


#define has_keyid_len(pattern) (\
    strlen (pattern) == 8  || strlen (pattern) == 10 || \
    strlen (pattern) == 16 || strlen (pattern) == 18)


gpgme_error_t
gpg_keycache_find_key2 (gpg_keycache_t ctx, const char *pattern, int flags,
                        gpgme_key_t *r_key, struct keycache_s **r_item)
{
    struct keycache_s *c;
    gpgme_subkey_t s;
    gpgme_user_id_t u;
    gpgme_key_t key;
    const char *kid;
    
    if (!ctx || !r_key)
        return gpg_error (GPG_ERR_INV_ARG);
    
    if (strstr (pattern, "0x"))
        pattern += 2;

    /* Sometimes a subkey has no valid fpr. As a kludge we convert v4 
       fingerprints into the 64-bit keyid. */
    if (strlen (pattern) == 40 && isxdigit (*pattern))
        pattern += 32;

    /* XXX: this code is very slow, revamp it and use hash tables whenever
            it is possible. */
    for (c = ctx->item; c; c = c->next) {
        key = c->key;
        assert (key->_refs >= 1);
        for (s = key->subkeys; s; s = s->next) {
            for (u = key->uids; u; u = u->next) {
                if (u->name && stristr (u->name, pattern)) {
                    if (r_item)
                        *r_item = c;
                    *r_key = flags? c->pubpart->key : c->key;
                    return 0;
                }
            }
            if (has_keyid_len (pattern))
                kid = s->keyid;
            else
                kid = s->fpr;
            if (kid && stristr (kid, pattern)) {
                if (r_item)
                    *r_item = c;
                *r_key = flags? c->pubpart->key : c->key;
                return 0;
            }
        }
    }
    *r_key = NULL;
    return gpg_error (GPG_ERR_INTERNAL);
} /* keycache_find_key */


gpgme_error_t
gpg_keycache_find_key (gpg_keycache_t ctx, const char *pattern,
                       int flags, gpgme_key_t *r_key)
{
    return gpg_keycache_find_key2 (ctx, pattern, flags, r_key, NULL);
}


gpgme_error_t
gpg_keycache_update_key (gpg_keycache_t ctx, int is_sec, 
                         void *opaque, const char *keyid)
{
    struct keycache_s *c = NULL, *c_new=NULL;
    gpgme_key_t key=NULL, fndkey=NULL;
    gpgme_error_t err;
    gpgme_ctx_t gctx;
    gpg_keycache_t pub = (gpg_keycache_t)opaque;

    err = gpgme_new (&gctx);
    if (err)
        return err;
    err = gpgme_get_key (gctx, keyid, &key, is_sec);
    gpgme_release (gctx);
    if (err)
        return err;
    err = gpg_keycache_find_key2 (ctx, keyid, 0, &fndkey, &c);
    if (!err && c != NULL) {
        log_debug ("keycache update: keyid=%s %p\r\n", keyid, pub);
        gpgme_key_release (fndkey);
        c->key = key;
        c->flags = 0;
        if (is_sec && pub != NULL && 
            !gpg_keycache_find_key (pub, keyid, 0, &fndkey)) {
            log_debug ("keycache update: set public part %p\r\n", fndkey);
            c->pubpart->key = fndkey;
        }
    }
    else {
        log_debug ("keycache add: sync public part\r\n");
        if (is_sec)
            gpg_keycache_find_key2 (pub, keyid, 0, &fndkey, &c_new);
        gpg_keycache_add_key (ctx, key, (void **)&c);
        if (c != NULL && is_sec) {
            log_debug ("keycache add: keyid=%s %p %p\r\n", keyid, c, fndkey);
            c->pubpart = c_new;
            if (c_new != NULL) {
                c->pubpart->key = fndkey;
                c->gloflags.is_protected = c_new->gloflags.is_protected;
                c->gloflags.divert_to_card = c_new->gloflags.divert_to_card;
            }
        }
    }
    return 0;
}


/* Delete a key from the cache @ctx with the pattern @pattern.
   Return value: 0 on success. */
gpgme_error_t
gpg_keycache_delete_key (gpg_keycache_t ctx, const char *pattern)
{
    struct keycache_s *itm = NULL, *c;
    gpgme_key_t key;
    gpgme_error_t rc;

    if (!ctx)
        return gpg_error (GPG_ERR_INV_ARG);
    rc = gpg_keycache_find_key2 (ctx, pattern, 0, &key, &itm);
    if (rc)
        return rc;
    
    c = ctx->item;
    if (c->next == NULL) {
        gpgme_key_release (itm->key);
        if (itm) 
            free (itm);
        ctx->item = NULL;
    }
    else {
        while (c && c->next != itm)
            c = c->next;
        c->next = c->next->next;
        gpgme_key_release (itm->key);
        if (itm)
            free (itm);
    }
    return 0;
}


/* Initialize the given cache @ctx. If @pattern is NULL, the entire keyring
   will be added to the cache. @secret is 1 if the source is the secret keyring.
   Return value: 0 on success. */
gpgme_error_t
gpg_keycache_init (gpg_keycache_t ctx, const char *pattern, int secret)
{
    gpgme_error_t err;
    gpgme_ctx_t c;
    gpgme_key_t key;
    int count = 0;
    
    if (!ctx)
        return gpg_error (GPG_ERR_INV_ARG);
    
    err = gpgme_new (&c);
    if (err)
        return err;

    gpgme_set_keylist_mode  (c, GPGME_KEYLIST_MODE_SIGS);
    err = gpgme_op_keylist_start (c, pattern, secret);
    while(!err) {
        err = gpgme_op_keylist_next (c, &key);
        if (!err)
            err = gpg_keycache_add_key (ctx, key, NULL);
        if (ctx->cb)
            ctx->cb (ctx->cb_value, _("Load GPG Keyrings..."), 0, 
                     count++, ctx->cb_value2);
    }
    if (gpgme_err_code (err) == GPG_ERR_EOF)
        err = gpg_error (GPG_ERR_NO_ERROR);
    /* XXX: make sure the progress dialog is closed. */
    gpgme_op_keylist_end (c);
    gpgme_release (c);
    return err;
}


/* XXX: kludge to see if the key is stored on a card. */
static int
key_divert_to_card (gpgme_key_t key)
{
    gpgme_subkey_t k;
    int n=0, n_alg=0, can_auth = 0;

    for (k = key->subkeys; k; k = k->next) {
        n++;
        if (k->pubkey_algo == GPGME_PK_RSA && k->length == 1024)
            n_alg++;
        if (k->can_authenticate)
            can_auth++;
    }
    if (n == 3 && n_alg == 3 && can_auth == 1)
        return 1;
    return 0;
}


gpgme_error_t
gpg_keycache_sync (gpg_keycache_t pub, gpg_keycache_t sec)
{
    struct keycache_s *c, *c_sec;
    gpgme_key_t key;

    if (!pub || !sec)
        return gpg_error (GPG_ERR_INV_ARG);
    
    for (c=sec->item; c; c=c->next) {   
        if (!gpg_keycache_find_key2 (pub, c->key->subkeys->keyid, 0, &key, &c_sec)) {
            c_sec->gloflags.is_protected = c->gloflags.is_protected;
            c_sec->gloflags.divert_to_card = c->gloflags.divert_to_card;
            if (!c->gloflags.divert_to_card)
                c->gloflags.divert_to_card = key_divert_to_card (key);
            c->pubpart = c_sec;
            c->pubpart->key = key;
        }
    }
    return 0;
}


/* Rewind the given cache @ctx to the begin. */
void
gpg_keycache_rewind (gpg_keycache_t ctx)
{
    if (ctx)
        ctx->pos = 0;
}


/* Return the number of elements in the cache @ctx. */
int
gpg_keycache_get_size (gpg_keycache_t ctx)
{
    struct keycache_s *c;
    int count = 0;
    
    if (!ctx)
        return 0;
    for (c = ctx->item; c; c = c->next)
        count++;
    return count;
}


static gpgme_error_t
keycache_next_key (gpg_keycache_t ctx, int flags, 
                   struct keycache_s **c, gpgme_key_t *r_key)
{       
    if (!ctx || !r_key)
        return gpg_error (GPG_ERR_INV_ARG);

    if (!ctx->pos)
        ctx->tmp = ctx->item;
    
    if (!ctx->tmp || !ctx->tmp->key) {
        ctx->pos = 0;
        *r_key = NULL;
        return gpg_error (GPG_ERR_EOF);
    }
    
    *r_key = flags? ctx->tmp->pubpart->key : ctx->tmp->key;
    *c = ctx->tmp = ctx->tmp->next;
    ctx->pos++;

    return 0;
}


/* Return the next key from the cache @ctx. The key will be returned 
   in @r_key. @flags can contain additional flags.
   Return value: 0 on success. */
gpgme_error_t
gpg_keycache_next_key (gpg_keycache_t ctx, int flags, gpgme_key_t *r_key)
{
    struct keycache_s *c=NULL;
    gpgme_error_t err = 0;

    err = keycache_next_key (ctx, flags, &c, r_key);
    return err;
}
1	werner	36	/* wptKeyCache.cpp- Caching for the pub- and the secring
2			* Copyright (C) 2001-2005 Timo Schulz
3			*
4			* This file is part of MyGPGME.
5			*
6			* MyGPGME is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* MyGPGME is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19			*/
20	werner	42	#ifdef HAVE_CONFIG_H
21			#include <config.h>
22			#endif
23
24	werner	36	#include <windows.h>
25			#include <stdio.h>
26			#include <string.h>
27			#include <malloc.h>
28			#include <ctype.h>
29			#include <assert.h>
30
31			#include "w32gpgme.h"
32			#include "wptKeyCache.h"
33			#include "openpgp.h"
34			#include "wptNLS.h"
35			#include "wptErrors.h"
36			#include "wptW32API.h"
37
38
39			/* convert a binary buffer into its hex representation. */
40			static void
41			buffer_to_string (char dst, size_t dlen, const byte buf, size_t nbytes)
42			{
43			char dig[3];
44			size_t i;
45
46			memset (dst, 0, dlen);
47			for (i = 0; i < nbytes && dlen > 0; i++) {
48			sprintf (dig, "%02X", buf[i]);
49			strcat (dst, dig);
50			dlen -= 2;
51			}
52			}
53
54
55			/* Parse the secret keyring and retrieve some additional information
56			for each key which was found. */
57			static void
58			parse_secring (gpg_keycache_t cache, const char kid, const char secring)
59			{
60			PACKET pkt = (PACKET)calloc (1, sizeof *pkt);
61			PKT_secret_key *sk;
62			gpg_iobuf_t inp;
63			gpgme_error_t err;
64			gpgme_key_t key;
65			struct keycache_s *c=NULL;
66			char keyid[16+1];
67
68			inp = gpg_iobuf_open (secring);
69			if (!inp) {
70			safe_free (pkt);
71			return;
72			}
73			gpg_iobuf_ioctl (inp, 3, 1, NULL);
74			gpg_init_packet (pkt);
75			while (gpg_parse_packet (inp, pkt) != -1) {
76			if (pkt->pkttype == PKT_SECRET_KEY) {
77			sk = pkt->pkt.secret_key;
78			/* XXX: key IDs of card public keys are wrong! */
79			_snprintf (keyid, sizeof (keyid)-1, "%08lX",
80			gpg_keyid_from_sk (sk, NULL));
81			if (kid && strcmp (kid, keyid) != 0)
82			goto next;
83			err = gpg_keycache_find_key2 (cache, keyid, 0, &key, &c);
84			if (err)
85			goto next;
86			c->gloflags.is_protected = sk->is_protected;
87			c->gloflags.divert_to_card = sk->protect.s2k.mode==1002? 1 : 0;
88			if (c->pubpart != NULL) {
89			c->pubpart->gloflags.is_protected = sk->is_protected;
90			c->pubpart->gloflags.divert_to_card = sk->protect.s2k.mode==1002? 1 : 0;
91			}
92			}
93			next:
94			gpg_free_packet (pkt);
95			gpg_init_packet (pkt);
96			}
97			safe_free (pkt);
98			gpg_iobuf_close (inp);
99			}
100
101
102			/* Merge the information from the keyrings into the key cache structure. */
103			gpgme_error_t
104			keycache_prepare2 (gpg_keycache_t ctx, const char *kid,
105			const char pubring, const char secring)
106			{
107			gpgme_error_t err;
108			gpgme_key_t key = NULL;
109			gpg_iobuf_t inp;
110			PACKET pkt = (PACKET)calloc (1, sizeof * pkt);
111			struct keycache_s *c;
112			const byte *sym_prefs;
113			char keyid[16+1], *id = NULL;
114			int key_seen = 0;
115			size_t nbytes = 0, nsym =0;
116
117			if (secring) {
118			parse_secring (ctx, kid, secring);
119			if (!pubring) {
120			safe_free(pkt);
121			return 0;
122			}
123			}
124			inp = gpg_iobuf_open (pubring);
125			if (!inp) {
126			safe_free( pkt );
127			return gpg_error (GPG_ERR_KEYRING_OPEN);
128			}
129			gpg_iobuf_ioctl( inp, 3, 1, NULL ); /* disable cache */
130
131			gpg_init_packet( pkt );
132			while (gpg_parse_packet (inp, pkt) != -1) {
133			if (pkt->pkttype == PKT_PUBLIC_KEY) {
134			strcpy (keyid, "");
135			key_seen = 1;
136			}
137
138			if (pkt->pkttype == PKT_SIGNATURE && pkt->pkt.signature->sig_class == 0x1F) {
139			if (pkt->pkt.signature->numrevkeys == 0)
140			goto next;
141			_snprintf (keyid, sizeof keyid -1, "%08X", pkt->pkt.signature->keyid[1]);
142			if (kid && strcmp (kid, keyid) != 0)
143			goto next;
144			err = gpg_keycache_find_key2 (ctx, keyid, 0, &key, &c);
145			if (err)
146			goto next;
147			c->gloflags.has_desig_rev = 1;
148			}
149			if (pkt->pkttype == PKT_SIGNATURE && key_seen == 1 ) {
150			sym_prefs=gpg_parse_sig_subpkt (pkt->pkt.signature->hashed,
151			SIGSUBPKT_PREF_SYM, &nsym);
152			if (sym_prefs == NULL)
153			goto next;
154			_snprintf (keyid, sizeof keyid - 1, "%08X", pkt->pkt.signature->keyid[1]);
155			if (kid && strcmp (kid, keyid) != 0)
156			goto next;
157			err = gpg_keycache_find_key2 (ctx, keyid, 0, &key, &c);
158			if (err)
159			goto next;
160			else if (nsym > 0) {
161			c->sym_prefs = (unsigned char*)calloc (1, nsym+1);
162			if (!c->sym_prefs)
163			return gpg_error (GPG_ERR_ENOMEM);
164			memcpy (c->sym_prefs, sym_prefs, nsym);
165			}
166			}
167			if (pkt->pkttype == PKT_USER_ID) {
168			if (id)
169			free (id);
170			id = strdup (pkt->pkt.user_id->name);
171			if (!id) {
172			err = gpg_error (GPG_ERR_ENOMEM);
173			goto fail;
174			}
175			}
176			if ((pkt->pkttype == PKT_USER_ID \|\| pkt->pkttype == PKT_ATTRIBUTE)
177			&& pkt->pkt.user_id->attrib_data && key) {
178			PKT_user_id *id = pkt->pkt.user_id;
179			c->attrib.used = 1;
180			c->attrib.len = id->attrib_len;
181			c->attrib.d = (unsigned char*)calloc (1, id->attrib_len + 1);
182			if (!c->attrib.d) {
183			err = gpg_error (GPG_ERR_ENOMEM);
184			goto fail;
185			}
186			memcpy (c->attrib.d, id->attrib_data, id->attrib_len);
187			key = NULL;
188			c = NULL;
189			}
190			next:
191			gpg_free_packet (pkt);
192			gpg_init_packet(pkt);
193			}
194
195			fail:
196			safe_free (id);
197			safe_free (pkt);
198			gpg_iobuf_close (inp);
199			return err;
200			}
201
202
203			gpgme_error_t
204			gpg_keycache_prepare (gpg_keycache_t ctx, const char pubr, const char secr)
205			{
206			return keycache_prepare2 (ctx, NULL, pubr, secr);
207			}
208
209			gpgme_error_t
210			gpg_keycache_prepare_single (gpg_keycache_t ctx, const char *keyid,
211			const char pubr, const char secr)
212			{
213			if (!strncmp (keyid, "0x", 2))
214			keyid += 2;
215			return keycache_prepare2 (ctx, keyid, pubr, secr);
216			}
217
218
219			/* Create new keycache object and return it in @r_ctx.
220			Return value: 0 on success. */
221			gpgme_error_t
222			gpg_keycache_new (gpg_keycache_t *r_ctx)
223			{
224			gpg_keycache_t ctx;
225
226			if (!r_ctx)
227			return gpg_error (GPG_ERR_INV_ARG);
228			ctx = (gpg_keycache_t)calloc (1, sizeof *ctx);
229			if (!ctx)
230			return gpg_error (GPG_ERR_ENOMEM);
231			ctx->secret = 0;
232			ctx->pos = 0;
233			*r_ctx = ctx;
234			return 0;
235			}
236
237
238			/* Release keycache object @ctx. */
239			void
240			gpg_keycache_release (gpg_keycache_t ctx)
241			{
242			struct keycache_s c, c2;
243
244			if (!ctx)
245			return;
246
247			for (c = ctx->item; c; c = c2) {
248			c2 = c->next;
249			gpgme_key_release (c->key);
250			c->key = NULL;
251			if (c->sym_prefs)
252			free (c->sym_prefs);
253			c->sym_prefs = NULL;
254			if (c->attrib.d)
255			free (c->attrib.d);
256			c->attrib.d = NULL;
257			if (c->card_type)
258			free (c->card_type);
259			free (c);
260			}
261			if (ctx)
262			free (ctx);
263			}
264
265
266			/* Set (progress) callback for the given keycache object.
267			@ctx the keycache
268			@cb the callback function
269			@cb_value1 opaque value which is passed to the callback.
270			@cb_value2 see @cb_value1. */
271			void
272			gpg_keycache_set_cb (gpg_keycache_t ctx,
273			void (cb)(void , const char *, int, int, int),
274			void * cb_value1, int cb_value2)
275			{
276			if (!ctx)
277			return;
278			ctx->cb = cb;
279			ctx->cb_value = cb_value1;
280			ctx->cb_value2 = cb_value2;
281			}
282
283
284			/* Add @key to the cache @ctx. @opaque return the key cache context as a void*.
285			Return value: 0 on success. */
286			gpgme_error_t
287			gpg_keycache_add_key (gpg_keycache_t ctx, gpgme_key_t key, void **opaque)
288			{
289	twoaday	41	struct keycache_s c, n1;
290	werner	36
291			if (!ctx)
292			return gpg_error (GPG_ERR_INV_ARG);
293
294			c = (struct keycache_s)calloc (1, sizeof c);
295			if (!c)
296			return gpg_error (GPG_ERR_ENOMEM);
297			c->gloflags.is_protected = 1; /default: assume protection. /
298			c->key = key;
299			if (!ctx->item)
300			ctx->item = c;
301			else {
302			for (n1 = ctx->item; n1 && n1->next; n1 = n1->next)
303			;
304			n1->next = c;
305			}
306			if (opaque)
307			*opaque = c;
308			return 0;
309			}
310
311
312
313			#define has_keyid_len(pattern) (\
314			strlen (pattern) == 8 \|\| strlen (pattern) == 10 \|\| \
315			strlen (pattern) == 16 \|\| strlen (pattern) == 18)
316
317
318			gpgme_error_t
319			gpg_keycache_find_key2 (gpg_keycache_t ctx, const char *pattern, int flags,
320			gpgme_key_t r_key, struct keycache_s *r_item)
321			{
322			struct keycache_s *c;
323			gpgme_subkey_t s;
324			gpgme_user_id_t u;
325			gpgme_key_t key;
326			const char *kid;
327
328			if (!ctx \|\| !r_key)
329			return gpg_error (GPG_ERR_INV_ARG);
330
331			if (strstr (pattern, "0x"))
332			pattern += 2;
333
334			/* Sometimes a subkey has no valid fpr. As a kludge we convert v4
335			fingerprints into the 64-bit keyid. */
336			if (strlen (pattern) == 40 && isxdigit (*pattern))
337			pattern += 32;
338
339			/* XXX: this code is very slow, revamp it and use hash tables whenever
340			it is possible. */
341			for (c = ctx->item; c; c = c->next) {
342			key = c->key;
343			assert (key->_refs >= 1);
344			for (s = key->subkeys; s; s = s->next) {
345			for (u = key->uids; u; u = u->next) {
346			if (u->name && stristr (u->name, pattern)) {
347			if (r_item)
348			*r_item = c;
349			*r_key = flags? c->pubpart->key : c->key;
350			return 0;
351			}
352			}
353			if (has_keyid_len (pattern))
354			kid = s->keyid;
355			else
356			kid = s->fpr;
357			if (kid && stristr (kid, pattern)) {
358			if (r_item)
359			*r_item = c;
360			*r_key = flags? c->pubpart->key : c->key;
361			return 0;
362			}
363			}
364			}
365			*r_key = NULL;
366			return gpg_error (GPG_ERR_INTERNAL);
367			} /* keycache_find_key */
368
369
370			gpgme_error_t
371			gpg_keycache_find_key (gpg_keycache_t ctx, const char *pattern,
372			int flags, gpgme_key_t *r_key)
373			{
374			return gpg_keycache_find_key2 (ctx, pattern, flags, r_key, NULL);
375			}
376
377
378			gpgme_error_t
379			gpg_keycache_update_key (gpg_keycache_t ctx, int is_sec,
380			void opaque, const char keyid)
381			{
382			struct keycache_s c = NULL, c_new=NULL;
383			gpgme_key_t key=NULL, fndkey=NULL;
384			gpgme_error_t err;
385			gpgme_ctx_t gctx;
386			gpg_keycache_t pub = (gpg_keycache_t)opaque;
387
388			err = gpgme_new (&gctx);
389			if (err)
390			return err;
391			err = gpgme_get_key (gctx, keyid, &key, is_sec);
392			gpgme_release (gctx);
393			if (err)
394			return err;
395			err = gpg_keycache_find_key2 (ctx, keyid, 0, &fndkey, &c);
396			if (!err && c != NULL) {
397			log_debug ("keycache update: keyid=%s %p\r\n", keyid, pub);
398			gpgme_key_release (fndkey);
399			c->key = key;
400			c->flags = 0;
401			if (is_sec && pub != NULL &&
402			!gpg_keycache_find_key (pub, keyid, 0, &fndkey)) {
403			log_debug ("keycache update: set public part %p\r\n", fndkey);
404			c->pubpart->key = fndkey;
405			}
406			}
407			else {
408			log_debug ("keycache add: sync public part\r\n");
409			if (is_sec)
410			gpg_keycache_find_key2 (pub, keyid, 0, &fndkey, &c_new);
411			gpg_keycache_add_key (ctx, key, (void **)&c);
412			if (c != NULL && is_sec) {
413			log_debug ("keycache add: keyid=%s %p %p\r\n", keyid, c, fndkey);
414			c->pubpart = c_new;
415			if (c_new != NULL) {
416			c->pubpart->key = fndkey;
417			c->gloflags.is_protected = c_new->gloflags.is_protected;
418			c->gloflags.divert_to_card = c_new->gloflags.divert_to_card;
419			}
420			}
421			}
422			return 0;
423			}
424
425
426			/* Delete a key from the cache @ctx with the pattern @pattern.
427			Return value: 0 on success. */
428			gpgme_error_t
429			gpg_keycache_delete_key (gpg_keycache_t ctx, const char *pattern)
430			{
431			struct keycache_s itm = NULL, c;
432			gpgme_key_t key;
433			gpgme_error_t rc;
434
435			if (!ctx)
436			return gpg_error (GPG_ERR_INV_ARG);
437			rc = gpg_keycache_find_key2 (ctx, pattern, 0, &key, &itm);
438			if (rc)
439			return rc;
440
441			c = ctx->item;
442			if (c->next == NULL) {
443			gpgme_key_release (itm->key);
444			if (itm)
445			free (itm);
446			ctx->item = NULL;
447			}
448			else {
449			while (c && c->next != itm)
450			c = c->next;
451			c->next = c->next->next;
452			gpgme_key_release (itm->key);
453			if (itm)
454			free (itm);
455			}
456			return 0;
457			}
458
459
460			/* Initialize the given cache @ctx. If @pattern is NULL, the entire keyring
461			will be added to the cache. @secret is 1 if the source is the secret keyring.
462			Return value: 0 on success. */
463			gpgme_error_t
464			gpg_keycache_init (gpg_keycache_t ctx, const char *pattern, int secret)
465			{
466			gpgme_error_t err;
467			gpgme_ctx_t c;
468			gpgme_key_t key;
469			int count = 0;
470
471			if (!ctx)
472			return gpg_error (GPG_ERR_INV_ARG);
473
474			err = gpgme_new (&c);
475			if (err)
476			return err;
477
478			gpgme_set_keylist_mode (c, GPGME_KEYLIST_MODE_SIGS);
479			err = gpgme_op_keylist_start (c, pattern, secret);
480			while(!err) {
481			err = gpgme_op_keylist_next (c, &key);
482			if (!err)
483			err = gpg_keycache_add_key (ctx, key, NULL);
484			if (ctx->cb)
485			ctx->cb (ctx->cb_value, _("Load GPG Keyrings..."), 0,
486			count++, ctx->cb_value2);
487			}
488			if (gpgme_err_code (err) == GPG_ERR_EOF)
489			err = gpg_error (GPG_ERR_NO_ERROR);
490			/* XXX: make sure the progress dialog is closed. */
491			gpgme_op_keylist_end (c);
492			gpgme_release (c);
493			return err;
494			}
495
496
497			/* XXX: kludge to see if the key is stored on a card. */
498			static int
499			key_divert_to_card (gpgme_key_t key)
500			{
501			gpgme_subkey_t k;
502			int n=0, n_alg=0, can_auth = 0;
503
504			for (k = key->subkeys; k; k = k->next) {
505			n++;
506			if (k->pubkey_algo == GPGME_PK_RSA && k->length == 1024)
507			n_alg++;
508			if (k->can_authenticate)
509			can_auth++;
510			}
511			if (n == 3 && n_alg == 3 && can_auth == 1)
512			return 1;
513			return 0;
514			}
515
516
517			gpgme_error_t
518			gpg_keycache_sync (gpg_keycache_t pub, gpg_keycache_t sec)
519			{
520			struct keycache_s c, c_sec;
521			gpgme_key_t key;
522
523			if (!pub \|\| !sec)
524			return gpg_error (GPG_ERR_INV_ARG);
525
526			for (c=sec->item; c; c=c->next) {
527			if (!gpg_keycache_find_key2 (pub, c->key->subkeys->keyid, 0, &key, &c_sec)) {
528			c_sec->gloflags.is_protected = c->gloflags.is_protected;
529			c_sec->gloflags.divert_to_card = c->gloflags.divert_to_card;
530			if (!c->gloflags.divert_to_card)
531			c->gloflags.divert_to_card = key_divert_to_card (key);
532			c->pubpart = c_sec;
533			c->pubpart->key = key;
534			}
535			}
536			return 0;
537			}
538
539
540			/* Rewind the given cache @ctx to the begin. */
541			void
542			gpg_keycache_rewind (gpg_keycache_t ctx)
543			{
544			if (ctx)
545			ctx->pos = 0;
546			}
547
548
549
550			/* Return the number of elements in the cache @ctx. */
551			int
552			gpg_keycache_get_size (gpg_keycache_t ctx)
553			{
554			struct keycache_s *c;
555			int count = 0;
556
557			if (!ctx)
558			return 0;
559			for (c = ctx->item; c; c = c->next)
560			count++;
561			return count;
562			}
563
564
565			static gpgme_error_t
566			keycache_next_key (gpg_keycache_t ctx, int flags,
567			struct keycache_s *c, gpgme_key_t r_key)
568			{
569			if (!ctx \|\| !r_key)
570			return gpg_error (GPG_ERR_INV_ARG);
571
572			if (!ctx->pos)
573			ctx->tmp = ctx->item;
574
575			if (!ctx->tmp \|\| !ctx->tmp->key) {
576			ctx->pos = 0;
577			*r_key = NULL;
578			return gpg_error (GPG_ERR_EOF);
579			}
580
581			*r_key = flags? ctx->tmp->pubpart->key : ctx->tmp->key;
582			*c = ctx->tmp = ctx->tmp->next;
583			ctx->pos++;
584
585			return 0;
586			}
587
588
589			/* Return the next key from the cache @ctx. The key will be returned
590			in @r_key. @flags can contain additional flags.
591			Return value: 0 on success. */
592			gpgme_error_t
593			gpg_keycache_next_key (gpg_keycache_t ctx, int flags, gpgme_key_t *r_key)
594			{
595			struct keycache_s *c=NULL;
596			gpgme_error_t err = 0;
597
598			err = keycache_next_key (ctx, flags, &c, r_key);
599			return err;
600			}