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