3 * $Id: key-data.c,v 1.4 2000/07/16 19:51:58 mdw Exp $
5 * Encoding and decoding of key data
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
32 * $Log: key-data.c,v $
33 * Revision 1.4 2000/07/16 19:51:58 mdw
34 * Shut stupid compiler up.
36 * Revision 1.3 2000/06/17 11:26:03 mdw
37 * key_structfind: track minor data structure change, and cope if the
38 * subkey isn't available.
40 * Revision 1.2 2000/02/12 18:21:02 mdw
41 * Overhaul of key management (again).
43 * Revision 1.1 1999/12/22 15:47:48 mdw
44 * Major key-management revision.
48 /*----- Header files ------------------------------------------------------*/
54 #include <mLib/base64.h>
55 #include <mLib/bits.h>
56 #include <mLib/dstr.h>
64 /*----- Setting new values ------------------------------------------------*/
66 /* --- @key_binary@ --- *
68 * Arguments: @key_data *k@ = pointer to key data block
69 * @const void *p@ = pointer to key data
70 * @size_t sz@ = size of the key data
74 * Use: Sets a binary key in a key data block.
77 void key_binary(key_data *k, const void *p, size_t sz)
79 k->e = (k->e & ~KF_ENCMASK) | KENC_BINARY;
80 k->u.k.k = sub_alloc(sz);
81 memcpy(k->u.k.k, p, sz);
85 /* --- @key_encrypted@ --- *
87 * Arguments: @key_data *k@ = pointer to key data block
88 * @const void *p@ = pointer to key data
89 * @size_t sz@ = size of the key data
93 * Use: Sets an encrypted key in a key data block.
96 void key_encrypted(key_data *k, const void *p, size_t sz)
98 k->e = (k->e & ~KF_ENCMASK) | KENC_ENCRYPT;
99 k->u.k.k = sub_alloc(sz);
100 memcpy(k->u.k.k, p, sz);
104 /* --- @key_mp@ --- *
106 * Arguments: @key_data *k@ = pointer to key data block
107 * @mp *m@ = pointer to the value to set
111 * Use: Sets a multiprecision integer key in a key block.
114 void key_mp(key_data *k, mp *m)
116 k->e = (k->e & ~KF_ENCMASK) | KENC_MP;
120 /* --- @key_structure@ --- *
122 * Arguments: @key_data *k@ = pointer to key data block
126 * Use: Initializes a structured key type.
129 void key_structure(key_data *k)
135 /* --- @key_structfind@ --- *
137 * Arguments: @key_data *k@ = pointer to key data block
138 * @const char *tag@ = pointer to tag string
140 * Returns: Pointer to key data block, or null.
142 * Use: Looks up the tag in a structured key.
145 key_data *key_structfind(key_data *k, const char *tag)
148 assert(((void)"Key is not structured",
149 (k->e & KF_ENCMASK) == KENC_STRUCT));
150 ks = sym_find(&k->u.s, tag, -1, 0, 0);
156 /* --- @key_structcreate@ --- *
158 * Arguments: @key_data *k@ = pointer to key data block
159 * @const char *tag@ = pointer to tag string
161 * Returns: Pointer to newly created key data.
163 * Use: Creates a new uninitialized subkey.
166 key_data *key_structcreate(key_data *k, const char *tag)
171 assert(((void)"Key is not structured", k->e == KENC_STRUCT));
172 ks = sym_find(&k->u.s, tag, -1, sizeof(*ks), &f);
179 /*----- Miscellaneous operations ------------------------------------------*/
181 /* --- @key_destroy@ --- *
183 * Arguments: @key_data *k@ = pointer to key data to destroy
187 * Use: Destroys a lump of key data.
190 void key_destroy(key_data *k)
192 switch (k->e & KF_ENCMASK) {
196 memset(k->u.k.k, 0, k->u.k.sz);
197 sub_free(k->u.k.k, k->u.k.sz);
206 for (sym_mkiter(&i, &k->u.s); (ks = sym_next(&i)) != 0; ) {
207 if (!(ks->k.e & KF_TEMP))
210 sym_destroy(&k->u.s);
215 /* --- @key_do@ --- *
217 * Arguments: @key_data *k@ = pointer to key data block
218 * @const key_filter *kf@ = pointer to filter block
219 * @dstr *d@ = pointer to base string
220 * @int (*func)(key_data *kd, dstr *d, void *p@ = function
221 * @void *p@ = argument to function
223 * Returns: Nonzero return code from function, or zero.
225 * Use: Runs a function over all the leaves of a key.
228 int key_do(key_data *k, const key_filter *kf, dstr *d,
229 int (*func)(key_data */*kd*/, dstr */*d*/, void */*p*/),
232 if (!KEY_MATCH(k, kf))
234 if ((k->e & KF_ENCMASK) != KENC_STRUCT)
235 return (func(k, d, p));
244 for (sym_mkiter(&i, &k->u.s); (ks = sym_next(&i)) != 0; ) {
247 dstr_putf(d, ".%s", SYM_NAME(ks));
249 if ((rc = key_do(&ks->k, kf, d, func, p)) != 0)
256 /* --- @key_copy@ --- *
258 * Arguments: @key_data *kd@ = pointer to destination data block
259 * @key_data *k@ = pointer to source data block
260 * @const key_filter *kf@ = pointer to filter block
262 * Returns: Nonzero if an item was actually copied.
264 * Use: Copies a chunk of key data from one place to another.
267 int key_copy(key_data *kd, key_data *k, const key_filter *kf)
271 if (!KEY_MATCH(kd, kf))
273 switch (k->e & KF_ENCMASK) {
275 /* --- Plain binary data --- */
279 kd->u.k.k = sub_alloc(k->u.k.sz);
280 memcpy(kd->u.k.k, k->u.k.k, k->u.k.sz);
281 kd->u.k.sz = k->u.k.sz;
284 /* --- Multiprecision integers --- */
287 kd->u.m = MP_COPY(k->u.m);
290 /* --- Structured key data --- */
297 sym_create(&kd->u.s);
298 for (sym_mkiter(&i, &k->u.s); (ks = sym_next(&i)) != 0; ) {
300 key_struct *kks = sym_find(&kd->u.s, SYM_NAME(ks), -1,
302 assert(((void)"Duplicate subkey tags", !f));
303 if (key_copy(&kks->k, &ks->k, kf))
306 sym_remove(&kd->u.s, kks);
309 sym_destroy(&kd->u.s);
317 /*----- That's all, folks -------------------------------------------------*/