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

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