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).
60 #include "internal/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>
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)) == NULL) {
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()) == NULL) {
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)) == NULL) {
107 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
111 if ((dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == 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))
173 ASN1_STRING_free(str);
179 * In PKCS#8 DSA: you just get a private key integer and parameters in the
180 * AlgorithmIdentifier the pubkey must be recalculated.
183 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
185 const unsigned char *p, *pm;
191 ASN1_INTEGER *privkey = NULL;
194 STACK_OF(ASN1_TYPE) *ndsa = NULL;
197 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
199 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
201 /* Check for broken DSA PKCS#8, UGH! */
202 if (*p == (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED)) {
204 if ((ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)) == NULL)
206 if (sk_ASN1_TYPE_num(ndsa) != 2)
209 * Handle Two broken types:
210 * SEQUENCE {parameters, priv_key}
211 * SEQUENCE {pub_key, priv_key}
214 t1 = sk_ASN1_TYPE_value(ndsa, 0);
215 t2 = sk_ASN1_TYPE_value(ndsa, 1);
216 if (t1->type == V_ASN1_SEQUENCE) {
217 p8->broken = PKCS8_EMBEDDED_PARAM;
218 pval = t1->value.ptr;
219 } else if (ptype == V_ASN1_SEQUENCE)
220 p8->broken = PKCS8_NS_DB;
224 if (t2->type != V_ASN1_INTEGER)
227 privkey = t2->value.integer;
229 const unsigned char *q = p;
230 if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
232 if (privkey->type == V_ASN1_NEG_INTEGER) {
233 p8->broken = PKCS8_NEG_PRIVKEY;
234 ASN1_STRING_clear_free(privkey);
235 if ((privkey = d2i_ASN1_UINTEGER(NULL, &q, pklen)) == NULL)
238 if (ptype != V_ASN1_SEQUENCE)
244 pmlen = pstr->length;
245 if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL)
247 /* We have parameters now set private key */
248 if ((dsa->priv_key = BN_secure_new()) == NULL
249 || !ASN1_INTEGER_to_BN(privkey, dsa->priv_key)) {
250 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
253 /* Calculate public key */
254 if ((dsa->pub_key = BN_new()) == NULL) {
255 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
258 if ((ctx = BN_CTX_new()) == NULL) {
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);
326 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
327 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 BN_free(to->pkey.dsa->p);
372 if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
374 BN_free(to->pkey.dsa->q);
377 if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
379 BN_free(to->pkey.dsa->g);
384 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
386 if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
387 BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
388 BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
394 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
396 if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
402 static void int_dsa_free(EVP_PKEY *pkey)
404 DSA_free(pkey->pkey.dsa);
407 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
412 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
416 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
418 unsigned char *m = NULL;
421 const char *ktype = NULL;
423 const BIGNUM *priv_key, *pub_key;
426 priv_key = x->priv_key;
431 pub_key = x->pub_key;
436 ktype = "Private-Key";
438 ktype = "Public-Key";
440 ktype = "DSA-Parameters";
442 update_buflen(x->p, &buf_len);
443 update_buflen(x->q, &buf_len);
444 update_buflen(x->g, &buf_len);
445 update_buflen(priv_key, &buf_len);
446 update_buflen(pub_key, &buf_len);
448 m = OPENSSL_malloc(buf_len + 10);
450 DSAerr(DSA_F_DO_DSA_PRINT, ERR_R_MALLOC_FAILURE);
455 if (!BIO_indent(bp, off, 128))
457 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
462 if (!ASN1_bn_print(bp, "priv:", priv_key, m, off))
464 if (!ASN1_bn_print(bp, "pub: ", pub_key, m, off))
466 if (!ASN1_bn_print(bp, "P: ", x->p, m, off))
468 if (!ASN1_bn_print(bp, "Q: ", x->q, m, off))
470 if (!ASN1_bn_print(bp, "G: ", x->g, m, off))
478 static int dsa_param_decode(EVP_PKEY *pkey,
479 const unsigned char **pder, int derlen)
483 if ((dsa = d2i_DSAparams(NULL, pder, derlen)) == NULL) {
484 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
487 EVP_PKEY_assign_DSA(pkey, dsa);
491 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
493 return i2d_DSAparams(pkey->pkey.dsa, pder);
496 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
499 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
502 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
505 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
508 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
511 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
514 static int old_dsa_priv_decode(EVP_PKEY *pkey,
515 const unsigned char **pder, int derlen)
519 if ((dsa = d2i_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
520 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
523 EVP_PKEY_assign_DSA(pkey, dsa);
527 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
529 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
532 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
533 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
536 const unsigned char *p;
538 if (BIO_puts(bp, "\n") <= 0)
544 dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
548 unsigned char *m = NULL;
549 update_buflen(dsa_sig->r, &buf_len);
550 update_buflen(dsa_sig->s, &buf_len);
551 m = OPENSSL_malloc(buf_len + 10);
553 DSAerr(DSA_F_DSA_SIG_PRINT, ERR_R_MALLOC_FAILURE);
557 if (BIO_write(bp, "\n", 1) != 1)
560 if (!ASN1_bn_print(bp, "r: ", dsa_sig->r, m, indent))
562 if (!ASN1_bn_print(bp, "s: ", dsa_sig->s, m, indent))
567 DSA_SIG_free(dsa_sig);
570 return X509_signature_dump(bp, sig, indent);
573 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
576 case ASN1_PKEY_CTRL_PKCS7_SIGN:
579 X509_ALGOR *alg1, *alg2;
580 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
581 if (alg1 == NULL || alg1->algorithm == NULL)
583 hnid = OBJ_obj2nid(alg1->algorithm);
584 if (hnid == NID_undef)
586 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
588 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
591 #ifndef OPENSSL_NO_CMS
592 case ASN1_PKEY_CTRL_CMS_SIGN:
595 X509_ALGOR *alg1, *alg2;
596 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
597 if (alg1 == NULL || alg1->algorithm == NULL)
599 hnid = OBJ_obj2nid(alg1->algorithm);
600 if (hnid == NID_undef)
602 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
604 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
608 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
609 *(int *)arg2 = CMS_RECIPINFO_NONE;
613 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
614 *(int *)arg2 = NID_sha256;
624 /* NB these are sorted in pkey_id order, lowest first */
626 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
654 "OpenSSL DSA method",
671 dsa_missing_parameters,