1 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/x509.h>
61 #include <openssl/asn1.h>
62 #include <openssl/dsa.h>
63 #include <openssl/bn.h>
64 #ifndef OPENSSL_NO_CMS
65 #include <openssl/cms.h>
67 #include "asn1_locl.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
);
86 if (ptype
== V_ASN1_SEQUENCE
)
92 if (!(dsa
= d2i_DSAparams(NULL
, &pm
, pmlen
)))
94 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_DECODE_ERROR
);
99 else if ((ptype
== V_ASN1_NULL
) || (ptype
== V_ASN1_UNDEF
))
101 if (!(dsa
= DSA_new()))
103 DSAerr(DSA_F_DSA_PUB_DECODE
, ERR_R_MALLOC_FAILURE
);
109 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_PARAMETER_ENCODING_ERROR
);
113 if (!(public_key
=d2i_ASN1_INTEGER(NULL
, &p
, pklen
)))
115 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_DECODE_ERROR
);
119 if (!(dsa
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)))
121 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_BN_DECODE_ERROR
);
125 ASN1_INTEGER_free(public_key
);
126 EVP_PKEY_assign_DSA(pkey
, dsa
);
131 ASN1_INTEGER_free(public_key
);
138 static int dsa_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
143 unsigned char *penc
= NULL
;
147 if (pkey
->save_parameters
&& dsa
->p
&& dsa
->q
&& dsa
->g
)
150 str
= ASN1_STRING_new();
151 str
->length
= i2d_DSAparams(dsa
, &str
->data
);
152 if (str
->length
<= 0)
154 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
158 ptype
= V_ASN1_SEQUENCE
;
161 ptype
= V_ASN1_UNDEF
;
165 penclen
= i2d_DSAPublicKey(dsa
, &penc
);
169 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
173 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_DSA
),
174 ptype
, pval
, penc
, penclen
))
181 ASN1_STRING_free(pval
);
186 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
187 * AlgorithmIdentifier the pubkey must be recalculated.
190 static int dsa_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
192 const unsigned char *p
, *pm
;
198 ASN1_INTEGER
*privkey
= NULL
;
201 STACK_OF(ASN1_TYPE
) *ndsa
= NULL
;
204 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
206 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
208 /* Check for broken DSA PKCS#8, UGH! */
209 if (*p
== (V_ASN1_SEQUENCE
|V_ASN1_CONSTRUCTED
))
212 if(!(ndsa
= d2i_ASN1_SEQUENCE_ANY(NULL
, &p
, pklen
)));
214 if (sk_ASN1_TYPE_num(ndsa
) != 2)
216 /* Handle Two broken types:
217 * SEQUENCE {parameters, priv_key}
218 * SEQUENCE {pub_key, priv_key}
221 t1
= sk_ASN1_TYPE_value(ndsa
, 0);
222 t2
= sk_ASN1_TYPE_value(ndsa
, 1);
223 if (t1
->type
== V_ASN1_SEQUENCE
)
225 p8
->broken
= PKCS8_EMBEDDED_PARAM
;
226 pval
= t1
->value
.ptr
;
228 else if (ptype
== V_ASN1_SEQUENCE
)
229 p8
->broken
= PKCS8_NS_DB
;
233 if (t2
->type
!= V_ASN1_INTEGER
)
236 privkey
= t2
->value
.integer
;
240 if (!(privkey
=d2i_ASN1_INTEGER(NULL
, &p
, pklen
)))
242 if (ptype
!= V_ASN1_SEQUENCE
)
248 pmlen
= pstr
->length
;
249 if (!(dsa
= d2i_DSAparams(NULL
, &pm
, pmlen
)))
251 /* We have parameters now set private key */
252 if (!(dsa
->priv_key
= ASN1_INTEGER_to_BN(privkey
, NULL
)))
254 DSAerr(DSA_F_DSA_PRIV_DECODE
,DSA_R_BN_ERROR
);
257 /* Calculate public key */
258 if (!(dsa
->pub_key
= BN_new()))
260 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
263 if (!(ctx
= BN_CTX_new()))
265 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
269 if (!BN_mod_exp(dsa
->pub_key
, dsa
->g
, dsa
->priv_key
, dsa
->p
, ctx
))
271 DSAerr(DSA_F_DSA_PRIV_DECODE
,DSA_R_BN_ERROR
);
275 EVP_PKEY_assign_DSA(pkey
, dsa
);
278 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
280 ASN1_INTEGER_free(privkey
);
285 DSAerr(DSA_F_DSA_PRIV_DECODE
, EVP_R_DECODE_ERROR
);
289 ASN1_INTEGER_free(privkey
);
290 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
295 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
297 ASN1_STRING
*params
= NULL
;
298 ASN1_INTEGER
*prkey
= NULL
;
299 unsigned char *dp
= NULL
;
302 params
= ASN1_STRING_new();
306 DSAerr(DSA_F_DSA_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
310 params
->length
= i2d_DSAparams(pkey
->pkey
.dsa
, ¶ms
->data
);
311 if (params
->length
<= 0)
313 DSAerr(DSA_F_DSA_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
316 params
->type
= V_ASN1_SEQUENCE
;
318 /* Get private key into integer */
319 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dsa
->priv_key
, NULL
);
323 DSAerr(DSA_F_DSA_PRIV_ENCODE
,DSA_R_BN_ERROR
);
327 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
329 ASN1_INTEGER_free(prkey
);
331 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_dsa
), 0,
332 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
341 ASN1_STRING_free(params
);
343 ASN1_INTEGER_free(prkey
);
347 static int int_dsa_size(const EVP_PKEY
*pkey
)
349 return(DSA_size(pkey
->pkey
.dsa
));
352 static int dsa_bits(const EVP_PKEY
*pkey
)
354 return BN_num_bits(pkey
->pkey
.dsa
->p
);
357 static int dsa_missing_parameters(const EVP_PKEY
*pkey
)
361 if ((dsa
->p
== NULL
) || (dsa
->q
== NULL
) || (dsa
->g
== NULL
))
366 static int dsa_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
370 if ((a
=BN_dup(from
->pkey
.dsa
->p
)) == NULL
)
372 if (to
->pkey
.dsa
->p
!= NULL
)
373 BN_free(to
->pkey
.dsa
->p
);
376 if ((a
=BN_dup(from
->pkey
.dsa
->q
)) == NULL
)
378 if (to
->pkey
.dsa
->q
!= NULL
)
379 BN_free(to
->pkey
.dsa
->q
);
382 if ((a
=BN_dup(from
->pkey
.dsa
->g
)) == NULL
)
384 if (to
->pkey
.dsa
->g
!= NULL
)
385 BN_free(to
->pkey
.dsa
->g
);
390 static int dsa_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
392 if ( BN_cmp(a
->pkey
.dsa
->p
,b
->pkey
.dsa
->p
) ||
393 BN_cmp(a
->pkey
.dsa
->q
,b
->pkey
.dsa
->q
) ||
394 BN_cmp(a
->pkey
.dsa
->g
,b
->pkey
.dsa
->g
))
400 static int dsa_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
402 if (BN_cmp(b
->pkey
.dsa
->pub_key
,a
->pkey
.dsa
->pub_key
) != 0)
408 static void int_dsa_free(EVP_PKEY
*pkey
)
410 DSA_free(pkey
->pkey
.dsa
);
413 static void update_buflen(const BIGNUM
*b
, size_t *pbuflen
)
418 if (*pbuflen
< (i
= (size_t)BN_num_bytes(b
)))
422 static int do_dsa_print(BIO
*bp
, const DSA
*x
, int off
, int ptype
)
424 unsigned char *m
=NULL
;
427 const char *ktype
= NULL
;
429 const BIGNUM
*priv_key
, *pub_key
;
432 priv_key
= x
->priv_key
;
437 pub_key
= x
->pub_key
;
442 ktype
= "Private-Key";
444 ktype
= "Public-Key";
446 ktype
= "DSA-Parameters";
448 update_buflen(x
->p
, &buf_len
);
449 update_buflen(x
->q
, &buf_len
);
450 update_buflen(x
->g
, &buf_len
);
451 update_buflen(priv_key
, &buf_len
);
452 update_buflen(pub_key
, &buf_len
);
454 m
=(unsigned char *)OPENSSL_malloc(buf_len
+10);
457 DSAerr(DSA_F_DO_DSA_PRINT
,ERR_R_MALLOC_FAILURE
);
463 if(!BIO_indent(bp
,off
,128))
465 if (BIO_printf(bp
,"%s: (%d bit)\n",ktype
, BN_num_bits(x
->p
))
469 if (!ASN1_bn_print(bp
,"priv:",priv_key
,m
,off
))
471 if (!ASN1_bn_print(bp
,"pub: ",pub_key
,m
,off
))
473 if (!ASN1_bn_print(bp
,"P: ",x
->p
,m
,off
)) goto err
;
474 if (!ASN1_bn_print(bp
,"Q: ",x
->q
,m
,off
)) goto err
;
475 if (!ASN1_bn_print(bp
,"G: ",x
->g
,m
,off
)) goto err
;
478 if (m
!= NULL
) OPENSSL_free(m
);
482 static int dsa_param_decode(EVP_PKEY
*pkey
,
483 const unsigned char **pder
, int derlen
)
486 if (!(dsa
= d2i_DSAparams(NULL
, pder
, derlen
)))
488 DSAerr(DSA_F_DSA_PARAM_DECODE
, ERR_R_DSA_LIB
);
491 EVP_PKEY_assign_DSA(pkey
, dsa
);
495 static int dsa_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
497 return i2d_DSAparams(pkey
->pkey
.dsa
, pder
);
500 static int dsa_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
503 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 0);
506 static int dsa_pub_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
509 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 1);
513 static int dsa_priv_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
516 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 2);
519 static int old_dsa_priv_decode(EVP_PKEY
*pkey
,
520 const unsigned char **pder
, int derlen
)
523 if (!(dsa
= d2i_DSAPrivateKey (NULL
, pder
, derlen
)))
525 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE
, ERR_R_DSA_LIB
);
528 EVP_PKEY_assign_DSA(pkey
, dsa
);
532 static int old_dsa_priv_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
534 return i2d_DSAPrivateKey(pkey
->pkey
.dsa
, pder
);
537 static int dsa_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
541 case ASN1_PKEY_CTRL_PKCS7_SIGN
:
545 X509_ALGOR
*alg1
, *alg2
;
546 PKCS7_SIGNER_INFO_get0_algs(arg2
, NULL
, &alg1
, &alg2
);
547 if (alg1
== NULL
|| alg1
->algorithm
== NULL
)
549 hnid
= OBJ_obj2nid(alg1
->algorithm
);
550 if (hnid
== NID_undef
)
552 if (!OBJ_find_sigid_by_algs(&snid
, hnid
, EVP_PKEY_id(pkey
)))
554 X509_ALGOR_set0(alg2
, OBJ_nid2obj(snid
), V_ASN1_UNDEF
, 0);
557 #ifndef OPENSSL_NO_CMS
558 case ASN1_PKEY_CTRL_CMS_SIGN
:
562 X509_ALGOR
*alg1
, *alg2
;
563 CMS_SignerInfo_get0_algs(arg2
, NULL
, NULL
, &alg1
, &alg2
);
564 if (alg1
== NULL
|| alg1
->algorithm
== NULL
)
566 hnid
= OBJ_obj2nid(alg1
->algorithm
);
567 if (hnid
== NID_undef
)
569 if (!OBJ_find_sigid_by_algs(&snid
, hnid
, EVP_PKEY_id(pkey
)))
571 X509_ALGOR_set0(alg2
, OBJ_nid2obj(snid
), V_ASN1_UNDEF
, 0);
576 case ASN1_PKEY_CTRL_DEFAULT_MD_NID
:
577 *(int *)arg2
= NID_sha1
;
587 /* NB these are sorted in pkey_id order, lowest first */
589 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths
[] =
622 "OpenSSL DSA method",
638 dsa_missing_parameters
,