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
)
133 unsigned char *penc
= NULL
;
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();
141 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
144 str
->length
= i2d_DSAparams(dsa
, &str
->data
);
145 if (str
->length
<= 0) {
146 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
149 ptype
= V_ASN1_SEQUENCE
;
151 ptype
= V_ASN1_UNDEF
;
153 dsa
->write_params
= 0;
155 penclen
= i2d_DSAPublicKey(dsa
, &penc
);
158 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
162 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_DSA
),
163 ptype
, str
, penc
, penclen
))
169 ASN1_STRING_free(str
);
175 * In PKCS#8 DSA: you just get a private key integer and parameters in the
176 * AlgorithmIdentifier the pubkey must be recalculated.
179 static int dsa_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
181 const unsigned char *p
, *pm
;
187 ASN1_INTEGER
*privkey
= NULL
;
190 STACK_OF(ASN1_TYPE
) *ndsa
= NULL
;
193 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
195 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
197 /* Check for broken DSA PKCS#8, UGH! */
198 if (*p
== (V_ASN1_SEQUENCE
| V_ASN1_CONSTRUCTED
)) {
200 if (!(ndsa
= d2i_ASN1_SEQUENCE_ANY(NULL
, &p
, pklen
)))
202 if (sk_ASN1_TYPE_num(ndsa
) != 2)
205 * Handle Two broken types:
206 * SEQUENCE {parameters, priv_key}
207 * SEQUENCE {pub_key, priv_key}
210 t1
= sk_ASN1_TYPE_value(ndsa
, 0);
211 t2
= sk_ASN1_TYPE_value(ndsa
, 1);
212 if (t1
->type
== V_ASN1_SEQUENCE
) {
213 p8
->broken
= PKCS8_EMBEDDED_PARAM
;
214 pval
= t1
->value
.ptr
;
215 } else if (ptype
== V_ASN1_SEQUENCE
)
216 p8
->broken
= PKCS8_NS_DB
;
220 if (t2
->type
!= V_ASN1_INTEGER
)
223 privkey
= t2
->value
.integer
;
225 const unsigned char *q
= p
;
226 if (!(privkey
= d2i_ASN1_INTEGER(NULL
, &p
, pklen
)))
228 if (privkey
->type
== V_ASN1_NEG_INTEGER
) {
229 p8
->broken
= PKCS8_NEG_PRIVKEY
;
230 ASN1_STRING_clear_free(privkey
);
231 if (!(privkey
= d2i_ASN1_UINTEGER(NULL
, &q
, pklen
)))
234 if (ptype
!= V_ASN1_SEQUENCE
)
240 pmlen
= pstr
->length
;
241 if (!(dsa
= d2i_DSAparams(NULL
, &pm
, pmlen
)))
243 /* We have parameters now set private key */
244 if (!(dsa
->priv_key
= ASN1_INTEGER_to_BN(privkey
, NULL
))) {
245 DSAerr(DSA_F_DSA_PRIV_DECODE
, DSA_R_BN_ERROR
);
248 /* Calculate public key */
249 if (!(dsa
->pub_key
= BN_new())) {
250 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
253 if (!(ctx
= BN_CTX_new())) {
254 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
258 if (!BN_mod_exp(dsa
->pub_key
, dsa
->g
, dsa
->priv_key
, dsa
->p
, ctx
)) {
259 DSAerr(DSA_F_DSA_PRIV_DECODE
, DSA_R_BN_ERROR
);
263 EVP_PKEY_assign_DSA(pkey
, dsa
);
266 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
268 ASN1_STRING_clear_free(privkey
);
273 DSAerr(DSA_F_DSA_PRIV_DECODE
, EVP_R_DECODE_ERROR
);
277 ASN1_STRING_clear_free(privkey
);
278 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
283 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
285 ASN1_STRING
*params
= NULL
;
286 ASN1_INTEGER
*prkey
= NULL
;
287 unsigned char *dp
= NULL
;
290 if (!pkey
->pkey
.dsa
|| !pkey
->pkey
.dsa
->priv_key
) {
291 DSAerr(DSA_F_DSA_PRIV_ENCODE
, DSA_R_MISSING_PARAMETERS
);
295 params
= ASN1_STRING_new();
298 DSAerr(DSA_F_DSA_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
302 params
->length
= i2d_DSAparams(pkey
->pkey
.dsa
, ¶ms
->data
);
303 if (params
->length
<= 0) {
304 DSAerr(DSA_F_DSA_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
307 params
->type
= V_ASN1_SEQUENCE
;
309 /* Get private key into integer */
310 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dsa
->priv_key
, NULL
);
313 DSAerr(DSA_F_DSA_PRIV_ENCODE
, DSA_R_BN_ERROR
);
317 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
319 ASN1_STRING_clear_free(prkey
);
321 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_dsa
), 0,
322 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
330 ASN1_STRING_free(params
);
332 ASN1_STRING_clear_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_security_bits(const EVP_PKEY
*pkey
)
348 return DSA_security_bits(pkey
->pkey
.dsa
);
351 static int dsa_missing_parameters(const EVP_PKEY
*pkey
)
354 dsa
= pkey
->pkey
.dsa
;
355 if ((dsa
->p
== NULL
) || (dsa
->q
== NULL
) || (dsa
->g
== NULL
))
360 static int dsa_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
364 if ((a
= BN_dup(from
->pkey
.dsa
->p
)) == NULL
)
366 if (to
->pkey
.dsa
->p
!= NULL
)
367 BN_free(to
->pkey
.dsa
->p
);
370 if ((a
= BN_dup(from
->pkey
.dsa
->q
)) == NULL
)
372 if (to
->pkey
.dsa
->q
!= NULL
)
373 BN_free(to
->pkey
.dsa
->q
);
376 if ((a
= BN_dup(from
->pkey
.dsa
->g
)) == NULL
)
378 if (to
->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
= (unsigned char *)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
))
479 static int dsa_param_decode(EVP_PKEY
*pkey
,
480 const unsigned char **pder
, int derlen
)
483 if (!(dsa
= d2i_DSAparams(NULL
, pder
, derlen
))) {
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
)
518 if (!(dsa
= d2i_DSAPrivateKey(NULL
, pder
, derlen
))) {
519 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE
, ERR_R_DSA_LIB
);
522 EVP_PKEY_assign_DSA(pkey
, dsa
);
526 static int old_dsa_priv_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
528 return i2d_DSAPrivateKey(pkey
->pkey
.dsa
, pder
);
531 static int dsa_sig_print(BIO
*bp
, const X509_ALGOR
*sigalg
,
532 const ASN1_STRING
*sig
, int indent
, ASN1_PCTX
*pctx
)
535 const unsigned char *p
;
537 if (BIO_puts(bp
, "\n") <= 0)
543 dsa_sig
= d2i_DSA_SIG(NULL
, &p
, sig
->length
);
547 unsigned char *m
= NULL
;
548 update_buflen(dsa_sig
->r
, &buf_len
);
549 update_buflen(dsa_sig
->s
, &buf_len
);
550 m
= OPENSSL_malloc(buf_len
+ 10);
552 DSAerr(DSA_F_DSA_SIG_PRINT
, ERR_R_MALLOC_FAILURE
);
556 if (BIO_write(bp
, "\n", 1) != 1)
559 if (!ASN1_bn_print(bp
, "r: ", dsa_sig
->r
, m
, indent
))
561 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
,