2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
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
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
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
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).
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>
68 #include "asn1_locl.h"
70 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
72 const unsigned char *p, *pm;
78 ASN1_INTEGER *public_key = NULL;
82 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
84 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
86 if (ptype == V_ASN1_SEQUENCE) {
91 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen))) {
92 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
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);
102 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
106 if (!(public_key = d2i_ASN1_INTEGER(NULL, &p, pklen))) {
107 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
111 if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL))) {
112 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
116 ASN1_INTEGER_free(public_key);
117 EVP_PKEY_assign_DSA(pkey, dsa);
122 ASN1_INTEGER_free(public_key);
129 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
134 unsigned char *penc = NULL;
137 dsa = pkey->pkey.dsa;
138 if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
140 str = ASN1_STRING_new();
141 str->length = i2d_DSAparams(dsa, &str->data);
142 if (str->length <= 0) {
143 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
147 ptype = V_ASN1_SEQUENCE;
149 ptype = V_ASN1_UNDEF;
151 dsa->write_params = 0;
153 penclen = i2d_DSAPublicKey(dsa, &penc);
156 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
160 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
161 ptype, pval, penc, penclen))
168 ASN1_STRING_free(pval);
174 * In PKCS#8 DSA: you just get a private key integer and parameters in the
175 * AlgorithmIdentifier the pubkey must be recalculated.
178 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
180 const unsigned char *p, *pm;
186 ASN1_INTEGER *privkey = NULL;
189 STACK_OF(ASN1_TYPE) *ndsa = NULL;
192 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
194 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
196 /* Check for broken DSA PKCS#8, UGH! */
197 if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
199 if (!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)))
201 if (sk_ASN1_TYPE_num(ndsa) != 2)
204 * Handle Two broken types:
205 * SEQUENCE {parameters, priv_key}
206 * SEQUENCE {pub_key, priv_key}
209 t1 = sk_ASN1_TYPE_value(ndsa, 0);
210 t2 = sk_ASN1_TYPE_value(ndsa, 1);
211 if (t1->type == V_ASN1_SEQUENCE) {
212 p8->broken = PKCS8_EMBEDDED_PARAM;
213 pval = t1->value.ptr;
214 } else if (ptype == V_ASN1_SEQUENCE)
215 p8->broken = PKCS8_NS_DB;
219 if (t2->type != V_ASN1_INTEGER)
222 privkey = t2->value.integer;
224 const unsigned char *q = p;
225 if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)))
227 if (privkey->type == V_ASN1_NEG_INTEGER) {
228 p8->broken = PKCS8_NEG_PRIVKEY;
229 ASN1_INTEGER_free(privkey);
230 if (!(privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen)))
233 if (ptype != V_ASN1_SEQUENCE)
239 pmlen = pstr->length;
240 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
242 /* We have parameters now set private key */
243 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
244 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
247 /* Calculate public key */
248 if (!(dsa->pub_key = BN_new())) {
249 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
252 if (!(ctx = BN_CTX_new())) {
253 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
257 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
258 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
262 EVP_PKEY_assign_DSA(pkey, dsa);
265 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
267 ASN1_INTEGER_free(privkey);
272 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
276 ASN1_INTEGER_free(privkey);
277 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
282 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
284 ASN1_STRING *params = NULL;
285 ASN1_INTEGER *prkey = NULL;
286 unsigned char *dp = NULL;
289 if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
290 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
294 params = ASN1_STRING_new();
297 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
301 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
302 if (params->length <= 0) {
303 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
306 params->type = V_ASN1_SEQUENCE;
308 /* Get private key into integer */
309 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
312 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
316 dplen = i2d_ASN1_INTEGER(prkey, &dp);
318 ASN1_INTEGER_free(prkey);
320 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
321 V_ASN1_SEQUENCE, params, dp, dplen))
330 ASN1_STRING_free(params);
332 ASN1_INTEGER_free(prkey);
336 static int int_dsa_size(const EVP_PKEY *pkey)
338 return (DSA_size(pkey->pkey.dsa));
341 static int dsa_bits(const EVP_PKEY *pkey)
343 return BN_num_bits(pkey->pkey.dsa->p);
346 static int dsa_missing_parameters(const EVP_PKEY *pkey)
349 dsa = pkey->pkey.dsa;
350 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
355 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
359 if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
361 if (to->pkey.dsa->p != NULL)
362 BN_free(to->pkey.dsa->p);
365 if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
367 if (to->pkey.dsa->q != NULL)
368 BN_free(to->pkey.dsa->q);
371 if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
373 if (to->pkey.dsa->g != NULL)
374 BN_free(to->pkey.dsa->g);
379 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
381 if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
382 BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
383 BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
389 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
391 if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
397 static void int_dsa_free(EVP_PKEY *pkey)
399 DSA_free(pkey->pkey.dsa);
402 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
407 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
411 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
413 unsigned char *m = NULL;
416 const char *ktype = NULL;
418 const BIGNUM *priv_key, *pub_key;
421 priv_key = x->priv_key;
426 pub_key = x->pub_key;
431 ktype = "Private-Key";
433 ktype = "Public-Key";
435 ktype = "DSA-Parameters";
437 update_buflen(x->p, &buf_len);
438 update_buflen(x->q, &buf_len);
439 update_buflen(x->g, &buf_len);
440 update_buflen(priv_key, &buf_len);
441 update_buflen(pub_key, &buf_len);
443 m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
445 DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE);
450 if (!BIO_indent(bp, off, 128))
452 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
457 if (!ASN1_bn_print(bp, "priv:", priv_key, m, off))
459 if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off))
461 if (!ASN1_bn_print(bp, "P: ", x->p, m, off))
463 if (!ASN1_bn_print(bp, "Q: ", x->q, m, off))
465 if (!ASN1_bn_print(bp, "G: ", x->g, m, off))
474 static int dsa_param_decode(EVP_PKEY *pkey,
475 const unsigned char **pder, int derlen)
478 if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) {
479 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
482 EVP_PKEY_assign_DSA(pkey, dsa);
486 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
488 return i2d_DSAparams(pkey->pkey.dsa, pder);
491 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
494 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
497 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
500 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
503 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
506 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
509 static int old_dsa_priv_decode(EVP_PKEY *pkey,
510 const unsigned char **pder, int derlen)
513 if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) {
514 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
517 EVP_PKEY_assign_DSA(pkey, dsa);
521 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
523 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
526 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
527 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
530 const unsigned char *p;
532 if (BIO_puts(bp, "\n") <= 0)
538 dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
542 unsigned char *m = NULL;
543 update_buflen(dsa_sig->r, &buf_len);
544 update_buflen(dsa_sig->s, &buf_len);
545 m = OPENSSL_malloc(buf_len + 10);
547 DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE);
551 if (BIO_write(bp, "\n", 1) != 1)
554 if (!ASN1_bn_print(bp, "r: ", dsa_sig->r, m, indent))
556 if (!ASN1_bn_print(bp, "s: ", dsa_sig->s, m, indent))
562 DSA_SIG_free(dsa_sig);
565 return X509_signature_dump(bp, sig, indent);
568 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
571 case ASN1_PKEY_CTRL_PKCS7_SIGN:
574 X509_ALGOR *alg1, *alg2;
575 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
576 if (alg1 == NULL || alg1->algorithm == NULL)
578 hnid = OBJ_obj2nid(alg1->algorithm);
579 if (hnid == NID_undef)
581 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
583 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
586 #ifndef OPENSSL_NO_CMS
587 case ASN1_PKEY_CTRL_CMS_SIGN:
590 X509_ALGOR *alg1, *alg2;
591 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
592 if (alg1 == NULL || alg1->algorithm == NULL)
594 hnid = OBJ_obj2nid(alg1->algorithm);
595 if (hnid == NID_undef)
597 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
599 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
604 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
605 *(int *)arg2 = NID_sha1;
615 /* NB these are sorted in pkey_id order, lowest first */
617 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
645 "OpenSSL DSA method",
661 dsa_missing_parameters,