summaryrefslogtreecommitdiff
path: root/src/lib/libcrypto/asn1/bio_asn1.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/libcrypto/asn1/bio_asn1.c')
-rw-r--r--src/lib/libcrypto/asn1/bio_asn1.c453
1 files changed, 0 insertions, 453 deletions
diff --git a/src/lib/libcrypto/asn1/bio_asn1.c b/src/lib/libcrypto/asn1/bio_asn1.c
deleted file mode 100644
index b9f54cd4ef..0000000000
--- a/src/lib/libcrypto/asn1/bio_asn1.c
+++ /dev/null
@@ -1,453 +0,0 @@
1/* $OpenBSD: bio_asn1.c,v 1.23 2023/07/28 09:58:30 tb Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project.
4 */
5/* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59/* Experimental ASN1 BIO. When written through the data is converted
60 * to an ASN1 string type: default is OCTET STRING. Additional functions
61 * can be provided to add prefix and suffix data.
62 */
63
64#include <stdlib.h>
65#include <string.h>
66
67#include <openssl/bio.h>
68#include <openssl/asn1.h>
69
70#include "bio_local.h"
71
72#define BIO_C_SET_PREFIX 149
73#define BIO_C_SET_SUFFIX 151
74
75/* Must be large enough for biggest tag+length */
76#define DEFAULT_ASN1_BUF_SIZE 20
77
78typedef enum {
79 ASN1_STATE_START,
80 ASN1_STATE_PRE_COPY,
81 ASN1_STATE_HEADER,
82 ASN1_STATE_HEADER_COPY,
83 ASN1_STATE_DATA_COPY,
84 ASN1_STATE_POST_COPY,
85 ASN1_STATE_DONE
86} asn1_bio_state_t;
87
88typedef struct BIO_ASN1_EX_FUNCS_st {
89 asn1_ps_func *ex_func;
90 asn1_ps_func *ex_free_func;
91} BIO_ASN1_EX_FUNCS;
92
93typedef struct BIO_ASN1_BUF_CTX_t {
94 /* Internal state */
95 asn1_bio_state_t state;
96 /* Internal buffer */
97 unsigned char *buf;
98 /* Size of buffer */
99 int bufsize;
100 /* Current position in buffer */
101 int bufpos;
102 /* Current buffer length */
103 int buflen;
104 /* Amount of data to copy */
105 int copylen;
106 /* Class and tag to use */
107 int asn1_class, asn1_tag;
108 asn1_ps_func *prefix, *prefix_free, *suffix, *suffix_free;
109 /* Extra buffer for prefix and suffix data */
110 unsigned char *ex_buf;
111 int ex_len;
112 int ex_pos;
113 void *ex_arg;
114} BIO_ASN1_BUF_CTX;
115
116
117static int asn1_bio_write(BIO *h, const char *buf, int num);
118static int asn1_bio_read(BIO *h, char *buf, int size);
119static int asn1_bio_puts(BIO *h, const char *str);
120static int asn1_bio_gets(BIO *h, char *str, int size);
121static long asn1_bio_ctrl(BIO *h, int cmd, long arg1, void *arg2);
122static int asn1_bio_new(BIO *h);
123static int asn1_bio_free(BIO *data);
124static long asn1_bio_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
125
126static int asn1_bio_flush_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx,
127 asn1_ps_func *cleanup, asn1_bio_state_t next);
128static int asn1_bio_setup_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx,
129 asn1_ps_func *setup, asn1_bio_state_t ex_state,
130 asn1_bio_state_t other_state);
131
132static const BIO_METHOD methods_asn1 = {
133 .type = BIO_TYPE_ASN1,
134 .name = "asn1",
135 .bwrite = asn1_bio_write,
136 .bread = asn1_bio_read,
137 .bputs = asn1_bio_puts,
138 .bgets = asn1_bio_gets,
139 .ctrl = asn1_bio_ctrl,
140 .create = asn1_bio_new,
141 .destroy = asn1_bio_free,
142 .callback_ctrl = asn1_bio_callback_ctrl
143};
144
145const BIO_METHOD *
146BIO_f_asn1(void)
147{
148 return (&methods_asn1);
149}
150
151static int
152asn1_bio_new(BIO *b)
153{
154 BIO_ASN1_BUF_CTX *ctx;
155
156 if ((ctx = calloc(1, sizeof(*ctx))) == NULL)
157 return 0;
158
159 if ((ctx->buf = malloc(DEFAULT_ASN1_BUF_SIZE)) == NULL) {
160 free(ctx);
161 return 0;
162 }
163 ctx->bufsize = DEFAULT_ASN1_BUF_SIZE;
164 ctx->asn1_class = V_ASN1_UNIVERSAL;
165 ctx->asn1_tag = V_ASN1_OCTET_STRING;
166 ctx->state = ASN1_STATE_START;
167
168 b->init = 1;
169 b->ptr = ctx;
170 b->flags = 0;
171
172 return 1;
173}
174
175static int
176asn1_bio_free(BIO *b)
177{
178 BIO_ASN1_BUF_CTX *ctx = b->ptr;
179
180 if (ctx == NULL)
181 return 0;
182
183 if (ctx->prefix_free != NULL)
184 ctx->prefix_free(b, &ctx->ex_buf, &ctx->ex_len, &ctx->ex_arg);
185 if (ctx->suffix_free != NULL)
186 ctx->suffix_free(b, &ctx->ex_buf, &ctx->ex_len, &ctx->ex_arg);
187
188 free(ctx->buf);
189 free(ctx);
190 b->init = 0;
191 b->ptr = NULL;
192 b->flags = 0;
193 return 1;
194}
195
196static int
197asn1_bio_write(BIO *b, const char *in , int inl)
198{
199 BIO_ASN1_BUF_CTX *ctx;
200 int wrmax, wrlen, ret, buflen;
201 unsigned char *p;
202
203 if (!in || (inl < 0) || (b->next_bio == NULL))
204 return 0;
205
206 if ((ctx = b->ptr) == NULL)
207 return 0;
208
209 wrlen = 0;
210 ret = -1;
211
212 for (;;) {
213 switch (ctx->state) {
214
215 /* Setup prefix data, call it */
216 case ASN1_STATE_START:
217 if (!asn1_bio_setup_ex(b, ctx, ctx->prefix,
218 ASN1_STATE_PRE_COPY, ASN1_STATE_HEADER))
219 return 0;
220 break;
221
222 /* Copy any pre data first */
223 case ASN1_STATE_PRE_COPY:
224 ret = asn1_bio_flush_ex(b, ctx, ctx->prefix_free,
225 ASN1_STATE_HEADER);
226 if (ret <= 0)
227 goto done;
228 break;
229
230 case ASN1_STATE_HEADER:
231 buflen = ASN1_object_size(0, inl, ctx->asn1_tag) - inl;
232 if (buflen <= 0 || buflen > ctx->bufsize)
233 return -1;
234 ctx->buflen = buflen;
235 p = ctx->buf;
236 ASN1_put_object(&p, 0, inl,
237 ctx->asn1_tag, ctx->asn1_class);
238 ctx->copylen = inl;
239 ctx->state = ASN1_STATE_HEADER_COPY;
240 break;
241
242 case ASN1_STATE_HEADER_COPY:
243 ret = BIO_write(b->next_bio,
244 ctx->buf + ctx->bufpos, ctx->buflen);
245 if (ret <= 0)
246 goto done;
247
248 ctx->buflen -= ret;
249 if (ctx->buflen)
250 ctx->bufpos += ret;
251 else {
252 ctx->bufpos = 0;
253 ctx->state = ASN1_STATE_DATA_COPY;
254 }
255 break;
256
257 case ASN1_STATE_DATA_COPY:
258
259 if (inl > ctx->copylen)
260 wrmax = ctx->copylen;
261 else
262 wrmax = inl;
263 ret = BIO_write(b->next_bio, in, wrmax);
264 if (ret <= 0)
265 goto done;
266 wrlen += ret;
267 ctx->copylen -= ret;
268 in += ret;
269 inl -= ret;
270
271 if (ctx->copylen == 0)
272 ctx->state = ASN1_STATE_HEADER;
273 if (inl == 0)
274 goto done;
275 break;
276
277 default:
278 BIO_clear_retry_flags(b);
279 return 0;
280 }
281
282 }
283
284 done:
285 BIO_clear_retry_flags(b);
286 BIO_copy_next_retry(b);
287
288 return (wrlen > 0) ? wrlen : ret;
289}
290
291static int
292asn1_bio_flush_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, asn1_ps_func *cleanup,
293 asn1_bio_state_t next)
294{
295 int ret;
296
297 if (ctx->ex_len <= 0)
298 return 1;
299 for (;;) {
300 ret = BIO_write(b->next_bio, ctx->ex_buf + ctx->ex_pos,
301 ctx->ex_len);
302 if (ret <= 0)
303 break;
304 ctx->ex_len -= ret;
305 if (ctx->ex_len > 0)
306 ctx->ex_pos += ret;
307 else {
308 if (cleanup)
309 cleanup(b, &ctx->ex_buf, &ctx->ex_len,
310 &ctx->ex_arg);
311 ctx->state = next;
312 ctx->ex_pos = 0;
313 break;
314 }
315 }
316 return ret;
317}
318
319static int
320asn1_bio_setup_ex(BIO *b, BIO_ASN1_BUF_CTX *ctx, asn1_ps_func *setup,
321 asn1_bio_state_t ex_state, asn1_bio_state_t other_state)
322{
323 if (setup && !setup(b, &ctx->ex_buf, &ctx->ex_len, &ctx->ex_arg)) {
324 BIO_clear_retry_flags(b);
325 return 0;
326 }
327 if (ctx->ex_len > 0)
328 ctx->state = ex_state;
329 else
330 ctx->state = other_state;
331 return 1;
332}
333
334static int
335asn1_bio_read(BIO *b, char *in , int inl)
336{
337 if (!b->next_bio)
338 return 0;
339 return BIO_read(b->next_bio, in , inl);
340}
341
342static int
343asn1_bio_puts(BIO *b, const char *str)
344{
345 return asn1_bio_write(b, str, strlen(str));
346}
347
348static int
349asn1_bio_gets(BIO *b, char *str, int size)
350{
351 if (!b->next_bio)
352 return 0;
353 return BIO_gets(b->next_bio, str , size);
354}
355
356static long
357asn1_bio_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
358{
359 if (b->next_bio == NULL)
360 return (0);
361 return BIO_callback_ctrl(b->next_bio, cmd, fp);
362}
363
364static long
365asn1_bio_ctrl(BIO *b, int cmd, long arg1, void *arg2)
366{
367 BIO_ASN1_BUF_CTX *ctx;
368 BIO_ASN1_EX_FUNCS *ex_func;
369 long ret = 1;
370
371 if ((ctx = b->ptr) == NULL)
372 return 0;
373 switch (cmd) {
374
375 case BIO_C_SET_PREFIX:
376 ex_func = arg2;
377 ctx->prefix = ex_func->ex_func;
378 ctx->prefix_free = ex_func->ex_free_func;
379 break;
380
381 case BIO_C_SET_SUFFIX:
382 ex_func = arg2;
383 ctx->suffix = ex_func->ex_func;
384 ctx->suffix_free = ex_func->ex_free_func;
385 break;
386
387 case BIO_C_SET_EX_ARG:
388 ctx->ex_arg = arg2;
389 break;
390
391 case BIO_C_GET_EX_ARG:
392 *(void **)arg2 = ctx->ex_arg;
393 break;
394
395 case BIO_CTRL_FLUSH:
396 if (!b->next_bio)
397 return 0;
398
399 /* Call post function if possible */
400 if (ctx->state == ASN1_STATE_HEADER) {
401 if (!asn1_bio_setup_ex(b, ctx, ctx->suffix,
402 ASN1_STATE_POST_COPY, ASN1_STATE_DONE))
403 return 0;
404 }
405
406 if (ctx->state == ASN1_STATE_POST_COPY) {
407 ret = asn1_bio_flush_ex(b, ctx, ctx->suffix_free,
408 ASN1_STATE_DONE);
409 if (ret <= 0)
410 return ret;
411 }
412
413 if (ctx->state == ASN1_STATE_DONE)
414 return BIO_ctrl(b->next_bio, cmd, arg1, arg2);
415 else {
416 BIO_clear_retry_flags(b);
417 return 0;
418 }
419 break;
420
421
422 default:
423 if (!b->next_bio)
424 return 0;
425 return BIO_ctrl(b->next_bio, cmd, arg1, arg2);
426
427 }
428
429 return ret;
430}
431
432static int
433asn1_bio_set_ex(BIO *b, int cmd, asn1_ps_func *ex_func, asn1_ps_func
434 *ex_free_func)
435{
436 BIO_ASN1_EX_FUNCS extmp;
437
438 extmp.ex_func = ex_func;
439 extmp.ex_free_func = ex_free_func;
440 return BIO_ctrl(b, cmd, 0, &extmp);
441}
442
443int
444BIO_asn1_set_prefix(BIO *b, asn1_ps_func *prefix, asn1_ps_func *prefix_free)
445{
446 return asn1_bio_set_ex(b, BIO_C_SET_PREFIX, prefix, prefix_free);
447}
448
449int
450BIO_asn1_set_suffix(BIO *b, asn1_ps_func *suffix, asn1_ps_func *suffix_free)
451{
452 return asn1_bio_set_ex(b, BIO_C_SET_SUFFIX, suffix, suffix_free);
453}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-23 19:36:57 +0000