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>
64 #include <openssl/bn.h>
65 #include <openssl/cms.h>
66 #include "internal/asn1_int.h"
67 #include "internal/evp_int.h"
69 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
71 const unsigned char *p, *pm;
77 ASN1_INTEGER *public_key = NULL;
81 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
83 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
85 if (ptype == V_ASN1_SEQUENCE) {
90 if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL) {
91 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
95 } else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF)) {
96 if ((dsa = DSA_new()) == NULL) {
97 DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
101 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
105 if ((public_key = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL) {
106 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
110 if ((dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)) == NULL) {
111 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
115 ASN1_INTEGER_free(public_key);
116 EVP_PKEY_assign_DSA(pkey, dsa);
120 ASN1_INTEGER_free(public_key);
126 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
130 unsigned char *penc = NULL;
132 ASN1_STRING *str = NULL;
133 ASN1_INTEGER *pubint = NULL;
135 dsa = pkey->pkey.dsa;
136 if (pkey->save_parameters && dsa->p && dsa->q && dsa->g) {
137 str = ASN1_STRING_new();
139 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
142 str->length = i2d_DSAparams(dsa, &str->data);
143 if (str->length <= 0) {
144 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
147 ptype = V_ASN1_SEQUENCE;
149 ptype = V_ASN1_UNDEF;
151 pubint = BN_to_ASN1_INTEGER(dsa->pub_key, NULL);
153 if (pubint == NULL) {
154 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
158 penclen = i2d_ASN1_INTEGER(pubint, &penc);
159 ASN1_INTEGER_free(pubint);
162 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
166 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
167 ptype, str, penc, penclen))
172 ASN1_STRING_free(str);
178 * In PKCS#8 DSA: you just get a private key integer and parameters in the
179 * AlgorithmIdentifier the pubkey must be recalculated.
182 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
184 const unsigned char *p, *pm;
190 ASN1_INTEGER *privkey = NULL;
197 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
199 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
201 if ((privkey = d2i_ASN1_INTEGER(NULL, &p, pklen)) == NULL)
203 if (privkey->type == V_ASN1_NEG_INTEGER || ptype != V_ASN1_SEQUENCE)
208 pmlen = pstr->length;
209 if ((dsa = d2i_DSAparams(NULL, &pm, pmlen)) == NULL)
211 /* We have parameters now set private key */
212 if ((dsa->priv_key = BN_secure_new()) == NULL
213 || !ASN1_INTEGER_to_BN(privkey, dsa->priv_key)) {
214 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
217 /* Calculate public key */
218 if ((dsa->pub_key = BN_new()) == NULL) {
219 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
222 if ((ctx = BN_CTX_new()) == NULL) {
223 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
227 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx)) {
228 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_BN_ERROR);
232 EVP_PKEY_assign_DSA(pkey, dsa);
238 DSAerr(DSA_F_DSA_PRIV_DECODE, DSA_R_DECODE_ERROR);
243 ASN1_STRING_clear_free(privkey);
247 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
249 ASN1_STRING *params = NULL;
250 ASN1_INTEGER *prkey = NULL;
251 unsigned char *dp = NULL;
254 if (!pkey->pkey.dsa || !pkey->pkey.dsa->priv_key) {
255 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_MISSING_PARAMETERS);
259 params = ASN1_STRING_new();
261 if (params == NULL) {
262 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
266 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
267 if (params->length <= 0) {
268 DSAerr(DSA_F_DSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
271 params->type = V_ASN1_SEQUENCE;
273 /* Get private key into integer */
274 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
277 DSAerr(DSA_F_DSA_PRIV_ENCODE, DSA_R_BN_ERROR);
281 dplen = i2d_ASN1_INTEGER(prkey, &dp);
283 ASN1_STRING_clear_free(prkey);
286 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
287 V_ASN1_SEQUENCE, params, dp, dplen))
294 ASN1_STRING_free(params);
295 ASN1_STRING_clear_free(prkey);
299 static int int_dsa_size(const EVP_PKEY *pkey)
301 return (DSA_size(pkey->pkey.dsa));
304 static int dsa_bits(const EVP_PKEY *pkey)
306 return BN_num_bits(pkey->pkey.dsa->p);
309 static int dsa_security_bits(const EVP_PKEY *pkey)
311 return DSA_security_bits(pkey->pkey.dsa);
314 static int dsa_missing_parameters(const EVP_PKEY *pkey)
317 dsa = pkey->pkey.dsa;
318 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
323 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
327 if (to->pkey.dsa == NULL) {
328 to->pkey.dsa = DSA_new();
329 if (to->pkey.dsa == NULL)
333 if ((a = BN_dup(from->pkey.dsa->p)) == NULL)
335 BN_free(to->pkey.dsa->p);
338 if ((a = BN_dup(from->pkey.dsa->q)) == NULL)
340 BN_free(to->pkey.dsa->q);
343 if ((a = BN_dup(from->pkey.dsa->g)) == NULL)
345 BN_free(to->pkey.dsa->g);
350 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
352 if (BN_cmp(a->pkey.dsa->p, b->pkey.dsa->p) ||
353 BN_cmp(a->pkey.dsa->q, b->pkey.dsa->q) ||
354 BN_cmp(a->pkey.dsa->g, b->pkey.dsa->g))
360 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
362 if (BN_cmp(b->pkey.dsa->pub_key, a->pkey.dsa->pub_key) != 0)
368 static void int_dsa_free(EVP_PKEY *pkey)
370 DSA_free(pkey->pkey.dsa);
373 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
376 const char *ktype = NULL;
377 const BIGNUM *priv_key, *pub_key;
380 priv_key = x->priv_key;
385 pub_key = x->pub_key;
390 ktype = "Private-Key";
392 ktype = "Public-Key";
394 ktype = "DSA-Parameters";
397 if (!BIO_indent(bp, off, 128))
399 if (BIO_printf(bp, "%s: (%d bit)\n", ktype, BN_num_bits(x->p))
404 if (!ASN1_bn_print(bp, "priv:", priv_key, NULL, off))
406 if (!ASN1_bn_print(bp, "pub: ", pub_key, NULL, off))
408 if (!ASN1_bn_print(bp, "P: ", x->p, NULL, off))
410 if (!ASN1_bn_print(bp, "Q: ", x->q, NULL, off))
412 if (!ASN1_bn_print(bp, "G: ", x->g, NULL, off))
419 static int dsa_param_decode(EVP_PKEY *pkey,
420 const unsigned char **pder, int derlen)
424 if ((dsa = d2i_DSAparams(NULL, pder, derlen)) == NULL) {
425 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
428 EVP_PKEY_assign_DSA(pkey, dsa);
432 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
434 return i2d_DSAparams(pkey->pkey.dsa, pder);
437 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
440 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
443 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
446 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
449 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
452 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
455 static int old_dsa_priv_decode(EVP_PKEY *pkey,
456 const unsigned char **pder, int derlen)
460 if ((dsa = d2i_DSAPrivateKey(NULL, pder, derlen)) == NULL) {
461 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
464 EVP_PKEY_assign_DSA(pkey, dsa);
468 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
470 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
473 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
474 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
477 const unsigned char *p;
480 if (BIO_puts(bp, "\n") <= 0)
486 dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
491 DSA_SIG_get0(&r, &s, dsa_sig);
493 if (BIO_write(bp, "\n", 1) != 1)
496 if (!ASN1_bn_print(bp, "r: ", r, NULL, indent))
498 if (!ASN1_bn_print(bp, "s: ", s, NULL, indent))
502 DSA_SIG_free(dsa_sig);
505 return X509_signature_dump(bp, sig, indent);
508 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
511 case ASN1_PKEY_CTRL_PKCS7_SIGN:
514 X509_ALGOR *alg1, *alg2;
515 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
516 if (alg1 == NULL || alg1->algorithm == NULL)
518 hnid = OBJ_obj2nid(alg1->algorithm);
519 if (hnid == NID_undef)
521 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
523 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
526 #ifndef OPENSSL_NO_CMS
527 case ASN1_PKEY_CTRL_CMS_SIGN:
530 X509_ALGOR *alg1, *alg2;
531 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
532 if (alg1 == NULL || alg1->algorithm == NULL)
534 hnid = OBJ_obj2nid(alg1->algorithm);
535 if (hnid == NID_undef)
537 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
539 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
543 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
544 *(int *)arg2 = CMS_RECIPINFO_NONE;
548 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
549 *(int *)arg2 = NID_sha256;
559 /* NB these are sorted in pkey_id order, lowest first */
561 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = {
589 "OpenSSL DSA method",
606 dsa_missing_parameters,