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 "internal/asn1_int.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);
121 ASN1_INTEGER_free(public_key);
127 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
131 unsigned char *penc = NULL;
133 ASN1_STRING *str = NULL;
134 ASN1_INTEGER *pubint = NULL;
136 dsa = pkey->pkey.dsa;
137 if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
138 str = ASN1_STRING_new();
140 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
143 str->length = i2d_DSAparams(dsa, &str->data);
144 if (str->length <= 0) {
145 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
148 ptype = V_ASN1_SEQUENCE;
150 ptype = V_ASN1_UNDEF;
152 pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
154 if (pubint == NULL) {
155 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
159 penclen = i2d_ASN1_INTEGER(pubint, &penc);
160 ASN1_INTEGER_free(pubint);
163 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
167 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
168 ptype, str, penc, penclen))
174 ASN1_STRING_free(str);
180 * In PKCS#8 DSA: you just get a private key integer and parameters in the
181 * AlgorithmIdentifier the pubkey must be recalculated.
184 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
186 const unsigned char *p, *pm;
192 ASN1_INTEGER *privkey = NULL;
195 STACK_OF(ASN1_TYPE) *ndsa = NULL;
198 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
200 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
202 /* Check for broken DSA PKCS#8, UGH! */
203 if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
205 if (!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)))
207 if (sk_ASN1_TYPE_num(ndsa) != 2)
210 * Handle Two broken types:
211 * SEQUENCE {parameters, priv_key}
212 * SEQUENCE {pub_key, priv_key}
215 t1 = sk_ASN1_TYPE_value(ndsa, 0);
216 t2 = sk_ASN1_TYPE_value(ndsa, 1);
217 if (t1->type == V_ASN1_SEQUENCE) {
218 p8->broken = PKCS8_EMBEDDED_PARAM;
219 pval = t1->value.ptr;
220 } else if (ptype == V_ASN1_SEQUENCE)
221 p8->broken = PKCS8_NS_DB;
225 if (t2->type != V_ASN1_INTEGER)
228 privkey = t2->value.integer;
230 const unsigned char *q = p;
231 if (!(privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)))
233 if (privkey->type == V_ASN1_NEG_INTEGER) {
234 p8->broken = PKCS8_NEG_PRIVKEY;
235 ASN1_STRING_clear_free(privkey);
236 if (!(privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen)))
239 if (ptype != V_ASN1_SEQUENCE)
245 pmlen = pstr->length;
246 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
248 /* We have parameters now set private key */
249 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL))) {
250 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
253 /* Calculate public key */
254 if (!(dsa->pub_key = BN_new())) {
255 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
258 if (!(ctx = BN_CTX_new())) {
259 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
263 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
264 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
268 EVP_PKEY_assign_DSA(pkey, dsa);
271 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
273 ASN1_STRING_clear_free(privkey);
278 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
281 ASN1_STRING_clear_free(privkey);
282 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
287 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
289 ASN1_STRING *params = NULL;
290 ASN1_INTEGER *prkey = NULL;
291 unsigned char *dp = NULL;
294 if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
295 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
299 params = ASN1_STRING_new();
302 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
306 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
307 if (params->length <= 0) {
308 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
311 params->type = V_ASN1_SEQUENCE;
313 /* Get private key into integer */
314 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
317 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
321 dplen = i2d_ASN1_INTEGER(prkey, &dp);
323 ASN1_STRING_clear_free(prkey);
325 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
326 V_ASN1_SEQUENCE, params, dp, dplen))
334 ASN1_STRING_free(params);
335 ASN1_STRING_clear_free(prkey);
339 static int int_dsa_size(const EVP_PKEY *pkey)
341 return (DSA_size(pkey->pkey.dsa));
344 static int dsa_bits(const EVP_PKEY *pkey)
346 return BN_num_bits(pkey->pkey.dsa->p);
349 static int dsa_security_bits(const EVP_PKEY *pkey)
351 return DSA_security_bits(pkey->pkey.dsa);
354 static int dsa_missing_parameters(const EVP_PKEY *pkey)
357 dsa = pkey->pkey.dsa;
358 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
363 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
367 if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
369 if (to->pkey.dsa->p != NULL)
370 BN_free(to->pkey.dsa->p);
373 if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
375 if (to->pkey.dsa->q != NULL)
376 BN_free(to->pkey.dsa->q);
379 if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
381 if (to->pkey.dsa->g != NULL)
382 BN_free(to->pkey.dsa->g);
387 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
389 if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
390 BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
391 BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
397 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
399 if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
405 static void int_dsa_free(EVP_PKEY *pkey)
407 DSA_free(pkey->pkey.dsa);
410 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
415 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
419 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
421 unsigned char *m = NULL;
424 const char *ktype = NULL;
426 const BIGNUM *priv_key, *pub_key;
429 priv_key = x->priv_key;
434 pub_key = x->pub_key;
439 ktype = "Private-Key";
441 ktype = "Public-Key";
443 ktype = "DSA-Parameters";
445 update_buflen(x->p, &buf_len);
446 update_buflen(x->q, &buf_len);
447 update_buflen(x->g, &buf_len);
448 update_buflen(priv_key, &buf_len);
449 update_buflen(pub_key, &buf_len);
451 m = OPENSSL_malloc(buf_len + 10);
453 DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE);
458 if (!BIO_indent(bp, off, 128))
460 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
465 if (!ASN1_bn_print(bp, "priv:", priv_key, m, off))
467 if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off))
469 if (!ASN1_bn_print(bp, "P: ", x->p, m, off))
471 if (!ASN1_bn_print(bp, "Q: ", x->q, m, off))
473 if (!ASN1_bn_print(bp, "G: ", x->g, m, off))
482 static int dsa_param_decode(EVP_PKEY *pkey,
483 const unsigned char **pder, int derlen)
486 if (!(dsa = d2i_DSAparams(NULL, pder, derlen))) {
487 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
490 EVP_PKEY_assign_DSA(pkey, dsa);
494 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
496 return i2d_DSAparams(pkey->pkey.dsa, pder);
499 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
502 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
505 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
508 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
511 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
514 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
517 static int old_dsa_priv_decode(EVP_PKEY *pkey,
518 const unsigned char **pder, int derlen)
521 if (!(dsa = d2i_DSAPrivateKey(NULL, pder, derlen))) {
522 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
525 EVP_PKEY_assign_DSA(pkey, dsa);
529 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
531 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
534 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
535 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
538 const unsigned char *p;
540 if (BIO_puts(bp, "\n") <= 0)
546 dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
550 unsigned char *m = NULL;
551 update_buflen(dsa_sig->r, &buf_len);
552 update_buflen(dsa_sig->s, &buf_len);
553 m = OPENSSL_malloc(buf_len + 10);
555 DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE);
559 if (BIO_write(bp, "\n", 1) != 1)
562 if (!ASN1_bn_print(bp, "r: ", dsa_sig->r, m, indent))
564 if (!ASN1_bn_print(bp, "s: ", dsa_sig->s, m, indent))
570 DSA_SIG_free(dsa_sig);
573 return X509_signature_dump(bp, sig, indent);
576 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
579 case ASN1_PKEY_CTRL_PKCS7_SIGN:
582 X509_ALGOR *alg1, *alg2;
583 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
584 if (alg1 == NULL || alg1->algorithm == NULL)
586 hnid = OBJ_obj2nid(alg1->algorithm);
587 if (hnid == NID_undef)
589 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
591 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
594 #ifndef OPENSSL_NO_CMS
595 case ASN1_PKEY_CTRL_CMS_SIGN:
598 X509_ALGOR *alg1, *alg2;
599 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
600 if (alg1 == NULL || alg1->algorithm == NULL)
602 hnid = OBJ_obj2nid(alg1->algorithm);
603 if (hnid == NID_undef)
605 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
607 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
611 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
612 *(int *)arg2 = CMS_RECIPINFO_NONE;
616 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
617 *(int *)arg2 = NID_sha256;
627 /* NB these are sorted in pkey_id order, lowest first */
629 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
657 "OpenSSL DSA method",
674 dsa_missing_parameters,