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 "asn1_locl.h"
65 static int dsa_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
67 const unsigned char *p
, *pm
;
73 ASN1_INTEGER
*public_key
= NULL
;
77 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, &palg
, pubkey
))
79 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
81 if (ptype
!= V_ASN1_SEQUENCE
)
83 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_PARAMETER_ENCODING_ERROR
);
91 if (!(dsa
= d2i_DSAparams(NULL
, &pm
, pmlen
)))
93 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_DECODE_ERROR
);
97 if (!(public_key
=d2i_ASN1_INTEGER(NULL
, &p
, pklen
)))
99 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_DECODE_ERROR
);
103 /* We have parameters now set public key */
104 if (!(dsa
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)))
106 DSAerr(DSA_F_DSA_PUB_DECODE
, DSA_R_BN_DECODE_ERROR
);
110 ASN1_INTEGER_free(public_key
);
111 EVP_PKEY_assign_DSA(pkey
, dsa
);
116 ASN1_INTEGER_free(public_key
);
123 static int dsa_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
128 unsigned char *penc
= NULL
;
132 if (pkey
->save_parameters
)
135 str
= ASN1_STRING_new();
136 str
->length
= i2d_DSAparams(dsa
, &str
->data
);
137 if (str
->length
<= 0)
139 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
143 ptype
= V_ASN1_SEQUENCE
;
147 ptype
= V_ASN1_UNDEF
;
152 penclen
= i2d_DSAPublicKey(dsa
, &penc
);
156 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
160 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_DSA
),
161 ptype
, pval
, penc
, penclen
))
168 ASN1_STRING_free(pval
);
173 static int dsa_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
175 if (BN_cmp(b
->pkey
.dsa
->pub_key
,a
->pkey
.dsa
->pub_key
) != 0)
181 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
182 * AlgorithmIdentifier the pubkey must be recalculated.
185 static int dsa_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
187 const unsigned char *p
, *pm
;
193 ASN1_INTEGER
*privkey
= NULL
;
196 STACK_OF(ASN1_TYPE
) *ndsa
= NULL
;
199 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
201 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
203 /* Check for broken DSA PKCS#8, UGH! */
204 if (*p
== (V_ASN1_SEQUENCE
|V_ASN1_CONSTRUCTED
))
207 if(!(ndsa
= ASN1_seq_unpack_ASN1_TYPE(p
, pklen
,
211 if (sk_ASN1_TYPE_num(ndsa
) != 2)
213 /* Handle Two broken types:
214 * SEQUENCE {parameters, priv_key}
215 * SEQUENCE {pub_key, priv_key}
218 t1
= sk_ASN1_TYPE_value(ndsa
, 0);
219 t2
= sk_ASN1_TYPE_value(ndsa
, 1);
220 if (t1
->type
== V_ASN1_SEQUENCE
)
222 p8
->broken
= PKCS8_EMBEDDED_PARAM
;
223 pval
= t1
->value
.ptr
;
225 else if (ptype
== V_ASN1_SEQUENCE
)
226 p8
->broken
= PKCS8_NS_DB
;
230 if (t2
->type
!= V_ASN1_INTEGER
)
233 privkey
= t2
->value
.integer
;
237 if (!(privkey
=d2i_ASN1_INTEGER(NULL
, &p
, 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
)))
251 DSAerr(DSA_F_DSA_PRIV_DECODE
,DSA_R_BN_ERROR
);
254 /* Calculate public key */
255 if (!(dsa
->pub_key
= BN_new()))
257 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
260 if (!(ctx
= BN_CTX_new()))
262 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
266 if (!BN_mod_exp(dsa
->pub_key
, dsa
->g
, dsa
->priv_key
, dsa
->p
, ctx
))
268 DSAerr(DSA_F_DSA_PRIV_DECODE
,DSA_R_BN_ERROR
);
272 EVP_PKEY_assign_DSA(pkey
, dsa
);
275 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
277 ASN1_INTEGER_free(privkey
);
282 DSAerr(DSA_F_DSA_PRIV_DECODE
, EVP_R_DECODE_ERROR
);
285 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
291 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
293 ASN1_STRING
*params
= NULL
;
294 ASN1_INTEGER
*prkey
= NULL
;
295 unsigned char *dp
= NULL
;
298 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)
309 DSAerr(DSA_F_DSA_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
312 params
->type
= V_ASN1_SEQUENCE
;
314 /* Get private key into integer */
315 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dsa
->priv_key
, NULL
);
319 DSAerr(DSA_F_DSA_PRIV_ENCODE
,DSA_R_BN_ERROR
);
323 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
325 ASN1_INTEGER_free(prkey
);
327 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_dsa
), 0,
328 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
337 ASN1_STRING_free(params
);
339 ASN1_INTEGER_free(prkey
);
343 static int int_dsa_size(const EVP_PKEY
*pkey
)
345 return(DSA_size(pkey
->pkey
.dsa
));
348 static int dsa_bits(const EVP_PKEY
*pkey
)
350 return BN_num_bits(pkey
->pkey
.dsa
->p
);
353 static int dsa_missing_parameters(const EVP_PKEY
*pkey
)
357 if ((dsa
->p
== NULL
) || (dsa
->q
== NULL
) || (dsa
->g
== NULL
))
362 static int dsa_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
366 if ((a
=BN_dup(from
->pkey
.dsa
->p
)) == NULL
)
368 if (to
->pkey
.dsa
->p
!= NULL
)
369 BN_free(to
->pkey
.dsa
->p
);
372 if ((a
=BN_dup(from
->pkey
.dsa
->q
)) == NULL
)
374 if (to
->pkey
.dsa
->q
!= NULL
)
375 BN_free(to
->pkey
.dsa
->q
);
378 if ((a
=BN_dup(from
->pkey
.dsa
->g
)) == NULL
)
380 if (to
->pkey
.dsa
->g
!= NULL
)
381 BN_free(to
->pkey
.dsa
->g
);
386 static int dsa_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
388 if ( BN_cmp(a
->pkey
.dsa
->p
,b
->pkey
.dsa
->p
) ||
389 BN_cmp(a
->pkey
.dsa
->q
,b
->pkey
.dsa
->q
) ||
390 BN_cmp(a
->pkey
.dsa
->g
,b
->pkey
.dsa
->g
))
396 static void int_dsa_free(EVP_PKEY
*pkey
)
398 DSA_free(pkey
->pkey
.dsa
);
401 static void update_buflen(const BIGNUM
*b
, size_t *pbuflen
)
406 if (*pbuflen
< (i
= (size_t)BN_num_bytes(b
)))
410 int do_dsa_print(BIO
*bp
, const DSA
*x
, int off
, int ptype
)
412 unsigned char *m
=NULL
;
415 const char *ktype
= NULL
;
417 const BIGNUM
*priv_key
, *pub_key
;
420 priv_key
= x
->priv_key
;
425 pub_key
= x
->pub_key
;
430 ktype
= "Private-Key";
432 ktype
= "Public-Key";
434 ktype
= "DSA-Parameters";
438 DSAerr(DSA_F_DSA_PRINT
,DSA_R_MISSING_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);
451 DSAerr(DSA_F_DSA_PRINT
,ERR_R_MALLOC_FAILURE
);
457 if(!BIO_indent(bp
,off
,128))
459 if (BIO_printf(bp
,"%s: (%d bit)\n",ktype
, BN_num_bits(x
->p
))
463 if (!ASN1_bn_print(bp
,"priv:",priv_key
,m
,off
))
465 if (!ASN1_bn_print(bp
,"pub: ",pub_key
,m
,off
))
467 if (!ASN1_bn_print(bp
,"P: ",x
->p
,m
,off
)) goto err
;
468 if (!ASN1_bn_print(bp
,"Q: ",x
->q
,m
,off
)) goto err
;
469 if (!ASN1_bn_print(bp
,"G: ",x
->g
,m
,off
)) goto err
;
472 if (m
!= NULL
) OPENSSL_free(m
);
476 static int dsa_param_decode(EVP_PKEY
*pkey
,
477 const unsigned char **pder
, int derlen
)
480 if (!(dsa
= d2i_DSAparams(NULL
, pder
, derlen
)))
482 DSAerr(DSA_F_DSA_PARAM_DECODE
, ERR_R_DSA_LIB
);
485 EVP_PKEY_assign_DSA(pkey
, dsa
);
489 static int dsa_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
491 return i2d_DSAparams(pkey
->pkey
.dsa
, pder
);
494 static int dsa_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
497 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 0);
500 static int dsa_pub_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
503 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 1);
507 static int dsa_priv_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
510 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 2);
513 static int old_dsa_priv_decode(EVP_PKEY
*pkey
,
514 const unsigned char **pder
, int derlen
)
517 if (!(dsa
= d2i_DSAPrivateKey (NULL
, pder
, derlen
)))
519 DSAerr(DSA_F_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 /* NB these are sorted in pkey_id order, lowest first */
533 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths
[] =
566 "OpenSSL DSA method",
582 dsa_missing_parameters
,