OpenSSL: update to 1.0.2a
[tomato.git] / release / src-rt-6.x.4708 / router / openssl / crypto / dsa / dsa_ameth.c
blob2a5cd71371a761fca7b40e357dc8f03bc2097040
1 /*
2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
3 * 2006.
4 */
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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.
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/)"
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.
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.
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/)"
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 * ====================================================================
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).
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/x509.h>
62 #include <openssl/asn1.h>
63 #include <openssl/dsa.h>
64 #include <openssl/bn.h>
65 #ifndef OPENSSL_NO_CMS
66 # include <openssl/cms.h>
67 #endif
68 #include "asn1_locl.h"
70 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
72 const unsigned char *p, *pm;
73 int pklen, pmlen;
74 int ptype;
75 void *pval;
76 ASN1_STRING *pstr;
77 X509_ALGOR *palg;
78 ASN1_INTEGER *public_key = NULL;
80 DSA *dsa = NULL;
82 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
83 return 0;
84 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
86 if (ptype == V_ASN1_SEQUENCE) {
87 pstr = pval;
88 pm = pstr->data;
89 pmlen = pstr->length;
91 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) {
92 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
93 goto err;
96 } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) {
97 if (!(dsa = DSA_new())) {
98 DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
99 goto err;
101 } else {
102 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
103 goto err;
106 if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) {
107 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
108 goto err;
111 if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) {
112 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
113 goto err;
116 ASN1_INTEGER_free(public_key);
117 EVP_PKEY_assign_DSA(pkey, dsa);
118 return 1;
120 err:
121 if (public_key)
122 ASN1_INTEGER_free(public_key);
123 if (dsa)
124 DSA_free(dsa);
125 return 0;
129 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
131 DSA *dsa;
132 int ptype;
133 unsigned char *penc = NULL;
134 int penclen;
135 ASN1_STRING *str = NULL;
137 dsa = pkey->pkey.dsa;
138 if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
139 str = ASN1_STRING_new();
140 if (!str) {
141 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
142 goto err;
144 str->length = i2d_DSAparams(dsa, &str->data);
145 if (str->length <= 0) {
146 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
147 goto err;
149 ptype = V_ASN1_SEQUENCE;
150 } else
151 ptype = V_ASN1_UNDEF;
153 dsa->write_params = 0;
155 penclen = i2d_DSAPublicKey(dsa, &penc);
157 if (penclen <= 0) {
158 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
159 goto err;
162 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
163 ptype, str, penc, penclen))
164 return 1;
166 err:
167 if (penc)
168 OPENSSL_free(penc);
169 if (str)
170 ASN1_STRING_free(str);
172 return 0;
176 * In PKCS#8 DSA: you just get a private key integer and parameters in the
177 * AlgorithmIdentifier the pubkey must be recalculated.
180 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
182 const unsigned char *p, *pm;
183 int pklen, pmlen;
184 int ptype;
185 void *pval;
186 ASN1_STRING *pstr;
187 X509_ALGOR *palg;
188 ASN1_INTEGER *privkey = NULL;
189 BN_CTX *ctx = NULL;
191 STACK_OF(ASN1_TYPE) *ndsa = NULL;
192 DSA *dsa = NULL;
194 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
195 return 0;
196 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
198 /* Check for broken DSA PKCS#8, UGH! */
199 if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
200 ASN1_TYPE *t1, *t2;
201 if (!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)))
202 goto decerr;
203 if (sk_ASN1_TYPE_num(ndsa) != 2)
204 goto decerr;
206 * Handle Two broken types:
207 * SEQUENCE {parameters, priv_key}
208 * SEQUENCE {pub_key, priv_key}
211 t1 = sk_ASN1_TYPE_value(ndsa, 0);
212 t2 = sk_ASN1_TYPE_value(ndsa, 1);
213 if (t1->type == V_ASN1_SEQUENCE) {
214 p8->broken = PKCS8_EMBEDDED_PARAM;
215 pval = t1->value.ptr;
216 } else if (ptype == V_ASN1_SEQUENCE)
217 p8->broken = PKCS8_NS_DB;
218 else
219 goto decerr;
221 if (t2->type != V_ASN1_INTEGER)
222 goto decerr;
224 privkey = t2->value.integer;
225 } else {
226 const unsigned char *q = p;
227 if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)))
228 goto decerr;
229 if (privkey->type == V_ASN1_NEG_INTEGER) {
230 p8->broken = PKCS8_NEG_PRIVKEY;
231 ASN1_STRING_clear_free(privkey);
232 if (!(privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen)))
233 goto decerr;
235 if (ptype != V_ASN1_SEQUENCE)
236 goto decerr;
239 pstr = pval;
240 pm = pstr->data;
241 pmlen = pstr->length;
242 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
243 goto decerr;
244 /* We have parameters now set private key */
245 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
246 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
247 goto dsaerr;
249 /* Calculate public key */
250 if (!(dsa->pub_key = BN_new())) {
251 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
252 goto dsaerr;
254 if (!(ctx = BN_CTX_new())) {
255 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
256 goto dsaerr;
259 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
260 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
261 goto dsaerr;
264 EVP_PKEY_assign_DSA(pkey, dsa);
265 BN_CTX_free(ctx);
266 if (ndsa)
267 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
268 else
269 ASN1_STRING_clear_free(privkey);
271 return 1;
273 decerr:
274 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
275 dsaerr:
276 BN_CTX_free(ctx);
277 if (privkey)
278 ASN1_STRING_clear_free(privkey);
279 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
280 DSA_free(dsa);
281 return 0;
284 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
286 ASN1_STRING *params = NULL;
287 ASN1_INTEGER *prkey = NULL;
288 unsigned char *dp = NULL;
289 int dplen;
291 if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
292 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
293 goto err;
296 params = ASN1_STRING_new();
298 if (!params) {
299 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
300 goto err;
303 params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
304 if (params->length <= 0) {
305 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
306 goto err;
308 params->type = V_ASN1_SEQUENCE;
310 /* Get private key into integer */
311 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
313 if (!prkey) {
314 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
315 goto err;
318 dplen = i2d_ASN1_INTEGER(prkey, &dp);
320 ASN1_STRING_clear_free(prkey);
322 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
323 V_ASN1_SEQUENCE, params, dp, dplen))
324 goto err;
326 return 1;
328 err:
329 if (dp != NULL)
330 OPENSSL_free(dp);
331 if (params != NULL)
332 ASN1_STRING_free(params);
333 if (prkey != NULL)
334 ASN1_STRING_clear_free(prkey);
335 return 0;
338 static int int_dsa_size(const EVP_PKEY *pkey)
340 return (DSA_size(pkey->pkey.dsa));
343 static int dsa_bits(const EVP_PKEY *pkey)
345 return BN_num_bits(pkey->pkey.dsa->p);
348 static int dsa_missing_parameters(const EVP_PKEY *pkey)
350 DSA *dsa;
351 dsa = pkey->pkey.dsa;
352 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
353 return 1;
354 return 0;
357 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
359 BIGNUM *a;
361 if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
362 return 0;
363 if (to->pkey.dsa->p != NULL)
364 BN_free(to->pkey.dsa->p);
365 to->pkey.dsa->p = a;
367 if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
368 return 0;
369 if (to->pkey.dsa->q != NULL)
370 BN_free(to->pkey.dsa->q);
371 to->pkey.dsa->q = a;
373 if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
374 return 0;
375 if (to->pkey.dsa->g != NULL)
376 BN_free(to->pkey.dsa->g);
377 to->pkey.dsa->g = a;
378 return 1;
381 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
383 if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
384 BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
385 BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
386 return 0;
387 else
388 return 1;
391 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
393 if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
394 return 0;
395 else
396 return 1;
399 static void int_dsa_free(EVP_PKEY *pkey)
401 DSA_free(pkey->pkey.dsa);
404 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
406 size_t i;
407 if (!b)
408 return;
409 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
410 *pbuflen = i;
413 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
415 unsigned char *m = NULL;
416 int ret = 0;
417 size_t buf_len = 0;
418 const char *ktype = NULL;
420 const BIGNUM *priv_key, *pub_key;
422 if (ptype == 2)
423 priv_key = x->priv_key;
424 else
425 priv_key = NULL;
427 if (ptype > 0)
428 pub_key = x->pub_key;
429 else
430 pub_key = NULL;
432 if (ptype == 2)
433 ktype = "Private-Key";
434 else if (ptype == 1)
435 ktype = "Public-Key";
436 else
437 ktype = "DSA-Parameters";
439 update_buflen(x->p, &buf_len);
440 update_buflen(x->q, &buf_len);
441 update_buflen(x->g, &buf_len);
442 update_buflen(priv_key, &buf_len);
443 update_buflen(pub_key, &buf_len);
445 m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
446 if (m == NULL) {
447 DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE);
448 goto err;
451 if (priv_key) {
452 if (!BIO_indent(bp, off, 128))
453 goto err;
454 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
455 <= 0)
456 goto err;
459 if (!ASN1_bn_print(bp, "priv:", priv_key, m, off))
460 goto err;
461 if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off))
462 goto err;
463 if (!ASN1_bn_print(bp, "P: ", x->p, m, off))
464 goto err;
465 if (!ASN1_bn_print(bp, "Q: ", x->q, m, off))
466 goto err;
467 if (!ASN1_bn_print(bp, "G: ", x->g, m, off))
468 goto err;
469 ret = 1;
470 err:
471 if (m != NULL)
472 OPENSSL_free(m);
473 return (ret);
476 static int dsa_param_decode(EVP_PKEY *pkey,
477 const unsigned char **pder, int derlen)
479 DSA *dsa;
480 if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) {
481 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
482 return 0;
484 EVP_PKEY_assign_DSA(pkey, dsa);
485 return 1;
488 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
490 return i2d_DSAparams(pkey->pkey.dsa, pder);
493 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
494 ASN1_PCTX *ctx)
496 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
499 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
500 ASN1_PCTX *ctx)
502 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
505 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
506 ASN1_PCTX *ctx)
508 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
511 static int old_dsa_priv_decode(EVP_PKEY *pkey,
512 const unsigned char **pder, int derlen)
514 DSA *dsa;
515 if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) {
516 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
517 return 0;
519 EVP_PKEY_assign_DSA(pkey, dsa);
520 return 1;
523 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
525 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
528 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
529 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
531 DSA_SIG *dsa_sig;
532 const unsigned char *p;
533 if (!sig) {
534 if (BIO_puts(bp, "\n") <= 0)
535 return 0;
536 else
537 return 1;
539 p = sig->data;
540 dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
541 if (dsa_sig) {
542 int rv = 0;
543 size_t buf_len = 0;
544 unsigned char *m = NULL;
545 update_buflen(dsa_sig->r, &buf_len);
546 update_buflen(dsa_sig->s, &buf_len);
547 m = OPENSSL_malloc(buf_len + 10);
548 if (m == NULL) {
549 DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE);
550 goto err;
553 if (BIO_write(bp, "\n", 1) != 1)
554 goto err;
556 if (!ASN1_bn_print(bp, "r: ", dsa_sig->r, m, indent))
557 goto err;
558 if (!ASN1_bn_print(bp, "s: ", dsa_sig->s, m, indent))
559 goto err;
560 rv = 1;
561 err:
562 if (m)
563 OPENSSL_free(m);
564 DSA_SIG_free(dsa_sig);
565 return rv;
567 return X509_signature_dump(bp, sig, indent);
570 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
572 switch (op) {
573 case ASN1_PKEY_CTRL_PKCS7_SIGN:
574 if (arg1 == 0) {
575 int snid, hnid;
576 X509_ALGOR *alg1, *alg2;
577 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
578 if (alg1 == NULL || alg1->algorithm == NULL)
579 return -1;
580 hnid = OBJ_obj2nid(alg1->algorithm);
581 if (hnid == NID_undef)
582 return -1;
583 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
584 return -1;
585 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
587 return 1;
588 #ifndef OPENSSL_NO_CMS
589 case ASN1_PKEY_CTRL_CMS_SIGN:
590 if (arg1 == 0) {
591 int snid, hnid;
592 X509_ALGOR *alg1, *alg2;
593 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
594 if (alg1 == NULL || alg1->algorithm == NULL)
595 return -1;
596 hnid = OBJ_obj2nid(alg1->algorithm);
597 if (hnid == NID_undef)
598 return -1;
599 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
600 return -1;
601 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
603 return 1;
605 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
606 *(int *)arg2 = CMS_RECIPINFO_NONE;
607 return 1;
608 #endif
610 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
611 *(int *)arg2 = NID_sha256;
612 return 2;
614 default:
615 return -2;
621 /* NB these are sorted in pkey_id order, lowest first */
623 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
626 EVP_PKEY_DSA2,
627 EVP_PKEY_DSA,
628 ASN1_PKEY_ALIAS},
631 EVP_PKEY_DSA1,
632 EVP_PKEY_DSA,
633 ASN1_PKEY_ALIAS},
636 EVP_PKEY_DSA4,
637 EVP_PKEY_DSA,
638 ASN1_PKEY_ALIAS},
641 EVP_PKEY_DSA3,
642 EVP_PKEY_DSA,
643 ASN1_PKEY_ALIAS},
646 EVP_PKEY_DSA,
647 EVP_PKEY_DSA,
650 "DSA",
651 "OpenSSL DSA method",
653 dsa_pub_decode,
654 dsa_pub_encode,
655 dsa_pub_cmp,
656 dsa_pub_print,
658 dsa_priv_decode,
659 dsa_priv_encode,
660 dsa_priv_print,
662 int_dsa_size,
663 dsa_bits,
665 dsa_param_decode,
666 dsa_param_encode,
667 dsa_missing_parameters,
668 dsa_copy_parameters,
669 dsa_cmp_parameters,
670 dsa_param_print,
671 dsa_sig_print,
673 int_dsa_free,
674 dsa_pkey_ctrl,
675 old_dsa_priv_decode,
676 old_dsa_priv_encode}