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-rw-r--r--src/lib/libcrypto/dsa/dsa_asn1.c439
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diff --git a/src/lib/libcrypto/dsa/dsa_asn1.c b/src/lib/libcrypto/dsa/dsa_asn1.c
deleted file mode 100644
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1/* $OpenBSD: dsa_asn1.c,v 1.16 2015/02/14 15:06:55 jsing Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000-2005 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#include <stdio.h>
60#include <string.h>
61
62#include <openssl/asn1.h>
63#include <openssl/asn1t.h>
64#include <openssl/dsa.h>
65#include <openssl/err.h>
66
67/* Override the default new methods */
68static int
69sig_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
70{
71 if (operation == ASN1_OP_NEW_PRE) {
72 DSA_SIG *sig;
73
74 sig = malloc(sizeof(DSA_SIG));
75 if (!sig) {
76 DSAerr(DSA_F_SIG_CB, ERR_R_MALLOC_FAILURE);
77 return 0;
78 }
79 sig->r = NULL;
80 sig->s = NULL;
81 *pval = (ASN1_VALUE *)sig;
82 return 2;
83 }
84 return 1;
85}
86
87static const ASN1_AUX DSA_SIG_aux = {
88 .app_data = NULL,
89 .flags = 0,
90 .ref_offset = 0,
91 .ref_lock = 0,
92 .asn1_cb = sig_cb,
93 .enc_offset = 0,
94};
95static const ASN1_TEMPLATE DSA_SIG_seq_tt[] = {
96 {
97 .flags = 0,
98 .tag = 0,
99 .offset = offsetof(DSA_SIG, r),
100 .field_name = "r",
101 .item = &CBIGNUM_it,
102 },
103 {
104 .flags = 0,
105 .tag = 0,
106 .offset = offsetof(DSA_SIG, s),
107 .field_name = "s",
108 .item = &CBIGNUM_it,
109 },
110};
111
112const ASN1_ITEM DSA_SIG_it = {
113 .itype = ASN1_ITYPE_SEQUENCE,
114 .utype = V_ASN1_SEQUENCE,
115 .templates = DSA_SIG_seq_tt,
116 .tcount = sizeof(DSA_SIG_seq_tt) / sizeof(ASN1_TEMPLATE),
117 .funcs = &DSA_SIG_aux,
118 .size = sizeof(DSA_SIG),
119 .sname = "DSA_SIG",
120};
121
122
123DSA_SIG *
124d2i_DSA_SIG(DSA_SIG **a, const unsigned char **in, long len)
125{
126 return (DSA_SIG *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
127 &DSA_SIG_it);
128}
129
130int
131i2d_DSA_SIG(const DSA_SIG *a, unsigned char **out)
132{
133 return ASN1_item_i2d((ASN1_VALUE *)a, out, &DSA_SIG_it);
134}
135
136/* Override the default free and new methods */
137static int
138dsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it, void *exarg)
139{
140 if (operation == ASN1_OP_NEW_PRE) {
141 *pval = (ASN1_VALUE *)DSA_new();
142 if (*pval)
143 return 2;
144 return 0;
145 } else if (operation == ASN1_OP_FREE_PRE) {
146 DSA_free((DSA *)*pval);
147 *pval = NULL;
148 return 2;
149 }
150 return 1;
151}
152
153static const ASN1_AUX DSAPrivateKey_aux = {
154 .app_data = NULL,
155 .flags = 0,
156 .ref_offset = 0,
157 .ref_lock = 0,
158 .asn1_cb = dsa_cb,
159 .enc_offset = 0,
160};
161static const ASN1_TEMPLATE DSAPrivateKey_seq_tt[] = {
162 {
163 .flags = 0,
164 .tag = 0,
165 .offset = offsetof(DSA, version),
166 .field_name = "version",
167 .item = &LONG_it,
168 },
169 {
170 .flags = 0,
171 .tag = 0,
172 .offset = offsetof(DSA, p),
173 .field_name = "p",
174 .item = &BIGNUM_it,
175 },
176 {
177 .flags = 0,
178 .tag = 0,
179 .offset = offsetof(DSA, q),
180 .field_name = "q",
181 .item = &BIGNUM_it,
182 },
183 {
184 .flags = 0,
185 .tag = 0,
186 .offset = offsetof(DSA, g),
187 .field_name = "g",
188 .item = &BIGNUM_it,
189 },
190 {
191 .flags = 0,
192 .tag = 0,
193 .offset = offsetof(DSA, pub_key),
194 .field_name = "pub_key",
195 .item = &BIGNUM_it,
196 },
197 {
198 .flags = 0,
199 .tag = 0,
200 .offset = offsetof(DSA, priv_key),
201 .field_name = "priv_key",
202 .item = &BIGNUM_it,
203 },
204};
205
206const ASN1_ITEM DSAPrivateKey_it = {
207 .itype = ASN1_ITYPE_SEQUENCE,
208 .utype = V_ASN1_SEQUENCE,
209 .templates = DSAPrivateKey_seq_tt,
210 .tcount = sizeof(DSAPrivateKey_seq_tt) / sizeof(ASN1_TEMPLATE),
211 .funcs = &DSAPrivateKey_aux,
212 .size = sizeof(DSA),
213 .sname = "DSA",
214};
215
216
217DSA *
218d2i_DSAPrivateKey(DSA **a, const unsigned char **in, long len)
219{
220 return (DSA *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
221 &DSAPrivateKey_it);
222}
223
224int
225i2d_DSAPrivateKey(const DSA *a, unsigned char **out)
226{
227 return ASN1_item_i2d((ASN1_VALUE *)a, out, &DSAPrivateKey_it);
228}
229
230static const ASN1_AUX DSAparams_aux = {
231 .app_data = NULL,
232 .flags = 0,
233 .ref_offset = 0,
234 .ref_lock = 0,
235 .asn1_cb = dsa_cb,
236 .enc_offset = 0,
237};
238static const ASN1_TEMPLATE DSAparams_seq_tt[] = {
239 {
240 .flags = 0,
241 .tag = 0,
242 .offset = offsetof(DSA, p),
243 .field_name = "p",
244 .item = &BIGNUM_it,
245 },
246 {
247 .flags = 0,
248 .tag = 0,
249 .offset = offsetof(DSA, q),
250 .field_name = "q",
251 .item = &BIGNUM_it,
252 },
253 {
254 .flags = 0,
255 .tag = 0,
256 .offset = offsetof(DSA, g),
257 .field_name = "g",
258 .item = &BIGNUM_it,
259 },
260};
261
262const ASN1_ITEM DSAparams_it = {
263 .itype = ASN1_ITYPE_SEQUENCE,
264 .utype = V_ASN1_SEQUENCE,
265 .templates = DSAparams_seq_tt,
266 .tcount = sizeof(DSAparams_seq_tt) / sizeof(ASN1_TEMPLATE),
267 .funcs = &DSAparams_aux,
268 .size = sizeof(DSA),
269 .sname = "DSA",
270};
271
272
273DSA *
274d2i_DSAparams(DSA **a, const unsigned char **in, long len)
275{
276 return (DSA *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
277 &DSAparams_it);
278}
279
280int
281i2d_DSAparams(const DSA *a, unsigned char **out)
282{
283 return ASN1_item_i2d((ASN1_VALUE *)a, out, &DSAparams_it);
284}
285
286/*
287 * DSA public key is a bit trickier... its effectively a CHOICE type
288 * decided by a field called write_params which can either write out
289 * just the public key as an INTEGER or the parameters and public key
290 * in a SEQUENCE
291 */
292
293static const ASN1_TEMPLATE dsa_pub_internal_seq_tt[] = {
294 {
295 .flags = 0,
296 .tag = 0,
297 .offset = offsetof(DSA, pub_key),
298 .field_name = "pub_key",
299 .item = &BIGNUM_it,
300 },
301 {
302 .flags = 0,
303 .tag = 0,
304 .offset = offsetof(DSA, p),
305 .field_name = "p",
306 .item = &BIGNUM_it,
307 },
308 {
309 .flags = 0,
310 .tag = 0,
311 .offset = offsetof(DSA, q),
312 .field_name = "q",
313 .item = &BIGNUM_it,
314 },
315 {
316 .flags = 0,
317 .tag = 0,
318 .offset = offsetof(DSA, g),
319 .field_name = "g",
320 .item = &BIGNUM_it,
321 },
322};
323
324const ASN1_ITEM dsa_pub_internal_it = {
325 .itype = ASN1_ITYPE_SEQUENCE,
326 .utype = V_ASN1_SEQUENCE,
327 .templates = dsa_pub_internal_seq_tt,
328 .tcount = sizeof(dsa_pub_internal_seq_tt) / sizeof(ASN1_TEMPLATE),
329 .funcs = NULL,
330 .size = sizeof(DSA),
331 .sname = "DSA",
332};
333
334static const ASN1_AUX DSAPublicKey_aux = {
335 .app_data = NULL,
336 .flags = 0,
337 .ref_offset = 0,
338 .ref_lock = 0,
339 .asn1_cb = dsa_cb,
340 .enc_offset = 0,
341};
342static const ASN1_TEMPLATE DSAPublicKey_ch_tt[] = {
343 {
344 .flags = 0,
345 .tag = 0,
346 .offset = offsetof(DSA, pub_key),
347 .field_name = "pub_key",
348 .item = &BIGNUM_it,
349 },
350 {
351 .flags = 0 | ASN1_TFLG_COMBINE,
352 .tag = 0,
353 .offset = 0,
354 .field_name = NULL,
355 .item = &dsa_pub_internal_it,
356 },
357};
358
359const ASN1_ITEM DSAPublicKey_it = {
360 .itype = ASN1_ITYPE_CHOICE,
361 .utype = offsetof(DSA, write_params),
362 .templates = DSAPublicKey_ch_tt,
363 .tcount = sizeof(DSAPublicKey_ch_tt) / sizeof(ASN1_TEMPLATE),
364 .funcs = &DSAPublicKey_aux,
365 .size = sizeof(DSA),
366 .sname = "DSA",
367};
368
369
370DSA *
371d2i_DSAPublicKey(DSA **a, const unsigned char **in, long len)
372{
373 return (DSA *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
374 &DSAPublicKey_it);
375}
376
377int
378i2d_DSAPublicKey(const DSA *a, unsigned char **out)
379{
380 return ASN1_item_i2d((ASN1_VALUE *)a, out, &DSAPublicKey_it);
381}
382
383DSA *
384DSAparams_dup(DSA *dsa)
385{
386 return ASN1_item_dup(ASN1_ITEM_rptr(DSAparams), dsa);
387}
388
389int
390DSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char *sig,
391 unsigned int *siglen, DSA *dsa)
392{
393 DSA_SIG *s;
394
395 s = DSA_do_sign(dgst, dlen, dsa);
396 if (s == NULL) {
397 *siglen = 0;
398 return 0;
399 }
400 *siglen = i2d_DSA_SIG(s,&sig);
401 DSA_SIG_free(s);
402 return 1;
403}
404
405/*
406 * data has already been hashed (probably with SHA or SHA-1).
407 * returns
408 * 1: correct signature
409 * 0: incorrect signature
410 * -1: error
411 */
412int
413DSA_verify(int type, const unsigned char *dgst, int dgst_len,
414 const unsigned char *sigbuf, int siglen, DSA *dsa)
415{
416 DSA_SIG *s;
417 unsigned char *der = NULL;
418 const unsigned char *p = sigbuf;
419 int derlen = -1;
420 int ret = -1;
421
422 s = DSA_SIG_new();
423 if (s == NULL)
424 return ret;
425 if (d2i_DSA_SIG(&s, &p, siglen) == NULL)
426 goto err;
427 /* Ensure signature uses DER and doesn't have trailing garbage */
428 derlen = i2d_DSA_SIG(s, &der);
429 if (derlen != siglen || memcmp(sigbuf, der, derlen))
430 goto err;
431 ret = DSA_do_verify(dgst, dgst_len, s, dsa);
432err:
433 if (derlen > 0) {
434 explicit_bzero(der, derlen);
435 free(der);
436 }
437 DSA_SIG_free(s);
438 return ret;
439}
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