3 * $Id: key-data.c,v 1.3 2000/06/17 11:26:03 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 1.3 2000/06/17 11:26:03 mdw
34 * key_structfind: track minor data structure change, and cope if the
35 * subkey isn't available.
37 * Revision 1.2 2000/02/12 18:21:02 mdw
38 * Overhaul of key management (again).
40 * Revision 1.1 1999/12/22 15:47:48 mdw
41 * Major key-management revision.
45 /*----- Header files ------------------------------------------------------*/
51 #include <mLib/base64.h>
52 #include <mLib/bits.h>
53 #include <mLib/dstr.h>
61 /*----- Setting new values ------------------------------------------------*/
63 /* --- @key_binary@ --- *
65 * Arguments: @key_data *k@ = pointer to key data block
66 * @const void *p@ = pointer to key data
67 * @size_t sz@ = size of the key data
71 * Use: Sets a binary key in a key data block.
74 void key_binary(key_data
*k
, const void *p
, size_t sz
)
76 k
->e
= (k
->e
& ~KF_ENCMASK
) | KENC_BINARY
;
77 k
->u
.k
.k
= sub_alloc(sz
);
78 memcpy(k
->u
.k
.k
, p
, sz
);
82 /* --- @key_encrypted@ --- *
84 * Arguments: @key_data *k@ = pointer to key data block
85 * @const void *p@ = pointer to key data
86 * @size_t sz@ = size of the key data
90 * Use: Sets an encrypted key in a key data block.
93 void key_encrypted(key_data
*k
, const void *p
, size_t sz
)
95 k
->e
= (k
->e
& ~KF_ENCMASK
) | KENC_ENCRYPT
;
96 k
->u
.k
.k
= sub_alloc(sz
);
97 memcpy(k
->u
.k
.k
, p
, sz
);
101 /* --- @key_mp@ --- *
103 * Arguments: @key_data *k@ = pointer to key data block
104 * @mp *m@ = pointer to the value to set
108 * Use: Sets a multiprecision integer key in a key block.
111 void key_mp(key_data
*k
, mp
*m
)
113 k
->e
= (k
->e
& ~KF_ENCMASK
) | KENC_MP
;
117 /* --- @key_structure@ --- *
119 * Arguments: @key_data *k@ = pointer to key data block
123 * Use: Initializes a structured key type.
126 void key_structure(key_data
*k
)
132 /* --- @key_structfind@ --- *
134 * Arguments: @key_data *k@ = pointer to key data block
135 * @const char *tag@ = pointer to tag string
137 * Returns: Pointer to key data block, or null.
139 * Use: Looks up the tag in a structured key.
142 key_data
*key_structfind(key_data
*k
, const char *tag
)
145 assert(((void)"Key is not structured",
146 (k
->e
& KF_ENCMASK
) == KENC_STRUCT
));
147 ks
= sym_find(&k
->u
.s
, tag
, -1, 0, 0);
153 /* --- @key_structcreate@ --- *
155 * Arguments: @key_data *k@ = pointer to key data block
156 * @const char *tag@ = pointer to tag string
158 * Returns: Pointer to newly created key data.
160 * Use: Creates a new uninitialized subkey.
163 key_data
*key_structcreate(key_data
*k
, const char *tag
)
168 assert(((void)"Key is not structured", k
->e
== KENC_STRUCT
));
169 ks
= sym_find(&k
->u
.s
, tag
, -1, sizeof(*ks
), &f
);
176 /*----- Miscellaneous operations ------------------------------------------*/
178 /* --- @key_destroy@ --- *
180 * Arguments: @key_data *k@ = pointer to key data to destroy
184 * Use: Destroys a lump of key data.
187 void key_destroy(key_data
*k
)
189 switch (k
->e
& KF_ENCMASK
) {
193 memset(k
->u
.k
.k
, 0, k
->u
.k
.sz
);
194 sub_free(k
->u
.k
.k
, k
->u
.k
.sz
);
203 for (sym_mkiter(&i
, &k
->u
.s
); (ks
= sym_next(&i
)) != 0; ) {
204 if (!(ks
->k
.e
& KF_TEMP
))
207 sym_destroy(&k
->u
.s
);
212 /* --- @key_do@ --- *
214 * Arguments: @key_data *k@ = pointer to key data block
215 * @const key_filter *kf@ = pointer to filter block
216 * @dstr *d@ = pointer to base string
217 * @int (*func)(key_data *kd, dstr *d, void *p@ = function
218 * @void *p@ = argument to function
220 * Returns: Nonzero return code from function, or zero.
222 * Use: Runs a function over all the leaves of a key.
225 int key_do(key_data
*k
, const key_filter
*kf
, dstr
*d
,
226 int (*func
)(key_data */
*kd*/
, dstr */
*d*/
, void */
*p*/
),
229 if (!KEY_MATCH(k
, kf
))
231 if ((k
->e
& KF_ENCMASK
) != KENC_STRUCT
)
232 return (func(k
, d
, p
));
241 for (sym_mkiter(&i
, &k
->u
.s
); (ks
= sym_next(&i
)) != 0; ) {
244 dstr_putf(d
, ".%s", SYM_NAME(ks
));
246 if ((rc
= key_do(&ks
->k
, kf
, d
, func
, p
)) != 0)
253 /* --- @key_copy@ --- *
255 * Arguments: @key_data *kd@ = pointer to destination data block
256 * @key_data *k@ = pointer to source data block
257 * @const key_filter *kf@ = pointer to filter block
259 * Returns: Nonzero if an item was actually copied.
261 * Use: Copies a chunk of key data from one place to another.
264 int key_copy(key_data
*kd
, key_data
*k
, const key_filter
*kf
)
268 if (!KEY_MATCH(kd
, kf
))
270 switch (k
->e
& KF_ENCMASK
) {
272 /* --- Plain binary data --- */
276 kd
->u
.k
.k
= sub_alloc(k
->u
.k
.sz
);
277 memcpy(kd
->u
.k
.k
, k
->u
.k
.k
, k
->u
.k
.sz
);
278 kd
->u
.k
.sz
= k
->u
.k
.sz
;
281 /* --- Multiprecision integers --- */
284 kd
->u
.m
= MP_COPY(k
->u
.m
);
287 /* --- Structured key data --- */
294 sym_create(&kd
->u
.s
);
295 for (sym_mkiter(&i
, &k
->u
.s
); (ks
= sym_next(&i
)) != 0; ) {
297 key_struct
*kks
= sym_find(&kd
->u
.s
, SYM_NAME(ks
), -1,
299 assert(((void)"Duplicate subkey tags", !f
));
300 if (key_copy(&kks
->k
, &ks
->k
, kf
))
303 sym_remove(&kd
->u
.s
, kks
);
306 sym_destroy(&kd
->u
.s
);
314 /*----- That's all, folks -------------------------------------------------*/