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
;
146 ptype
= V_ASN1_UNDEF
;
149 penclen
= i2d_DSAPublicKey(dsa
, &penc
);
153 DSAerr(DSA_F_DSA_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
157 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_DSA
),
158 ptype
, pval
, penc
, penclen
))
165 ASN1_STRING_free(pval
);
170 static int dsa_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
172 if (BN_cmp(b
->pkey
.dsa
->pub_key
,a
->pkey
.dsa
->pub_key
) != 0)
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
;
193 STACK_OF(ASN1_TYPE
) *ndsa
= NULL
;
196 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
198 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
200 /* Check for broken DSA PKCS#8, UGH! */
201 if (*p
== (V_ASN1_SEQUENCE
|V_ASN1_CONSTRUCTED
))
204 if(!(ndsa
= ASN1_seq_unpack_ASN1_TYPE(p
, pklen
,
208 if (sk_ASN1_TYPE_num(ndsa
) != 2)
210 /* Handle Two broken types:
211 * SEQUENCE {parameters, priv_key}
212 * SEQUENCE {pub_key, priv_key}
215 t1
= sk_ASN1_TYPE_value(ndsa
, 0);
216 t2
= sk_ASN1_TYPE_value(ndsa
, 1);
217 if (t1
->type
== V_ASN1_SEQUENCE
)
219 p8
->broken
= PKCS8_EMBEDDED_PARAM
;
220 pval
= t1
->value
.ptr
;
222 else if (ptype
== V_ASN1_SEQUENCE
)
223 p8
->broken
= PKCS8_NS_DB
;
227 if (t2
->type
!= V_ASN1_INTEGER
)
230 privkey
= t2
->value
.integer
;
234 if (!(privkey
=d2i_ASN1_INTEGER(NULL
, &p
, pklen
)))
236 if (ptype
!= V_ASN1_SEQUENCE
)
242 pmlen
= pstr
->length
;
243 if (!(dsa
= d2i_DSAparams(NULL
, &pm
, pmlen
)))
245 /* We have parameters now set private key */
246 if (!(dsa
->priv_key
= ASN1_INTEGER_to_BN(privkey
, NULL
)))
248 DSAerr(DSA_F_DSA_PRIV_DECODE
,DSA_R_BN_ERROR
);
251 /* Calculate public key */
252 if (!(dsa
->pub_key
= BN_new()))
254 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_MALLOC_FAILURE
);
257 if (!(ctx
= BN_CTX_new()))
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
))
265 DSAerr(DSA_F_DSA_PRIV_DECODE
,DSA_R_BN_ERROR
);
269 EVP_PKEY_assign_DSA(pkey
, dsa
);
272 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
274 ASN1_INTEGER_free(privkey
);
279 DSAerr(DSA_F_DSA_PRIV_DECODE
, EVP_R_DECODE_ERROR
);
282 sk_ASN1_TYPE_pop_free(ndsa
, ASN1_TYPE_free
);
288 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
290 ASN1_STRING
*params
= NULL
;
291 ASN1_INTEGER
*prkey
= NULL
;
292 unsigned char *dp
= NULL
;
295 params
= ASN1_STRING_new();
299 DSAerr(DSA_F_DSA_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
303 params
->length
= i2d_DSAparams(pkey
->pkey
.dsa
, ¶ms
->data
);
304 if (params
->length
<= 0)
306 DSAerr(DSA_F_DSA_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
309 params
->type
= V_ASN1_SEQUENCE
;
311 /* Get private key into integer */
312 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dsa
->priv_key
, NULL
);
316 DSAerr(DSA_F_DSA_PRIV_ENCODE
,DSA_R_BN_ERROR
);
320 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
322 ASN1_INTEGER_free(prkey
);
324 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_dsa
), 0,
325 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
334 ASN1_STRING_free(params
);
336 ASN1_INTEGER_free(prkey
);
340 static int int_dsa_size(const EVP_PKEY
*pkey
)
342 return(DSA_size(pkey
->pkey
.dsa
));
345 static int dsa_bits(const EVP_PKEY
*pkey
)
347 return BN_num_bits(pkey
->pkey
.dsa
->p
);
350 static int dsa_missing_parameters(const EVP_PKEY
*pkey
)
354 if ((dsa
->p
== NULL
) || (dsa
->q
== NULL
) || (dsa
->g
== NULL
))
359 static int dsa_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
363 if ((a
=BN_dup(from
->pkey
.dsa
->p
)) == NULL
)
365 if (to
->pkey
.dsa
->p
!= NULL
)
366 BN_free(to
->pkey
.dsa
->p
);
369 if ((a
=BN_dup(from
->pkey
.dsa
->q
)) == NULL
)
371 if (to
->pkey
.dsa
->q
!= NULL
)
372 BN_free(to
->pkey
.dsa
->q
);
375 if ((a
=BN_dup(from
->pkey
.dsa
->g
)) == NULL
)
377 if (to
->pkey
.dsa
->g
!= NULL
)
378 BN_free(to
->pkey
.dsa
->g
);
383 static int dsa_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
385 if ( BN_cmp(a
->pkey
.dsa
->p
,b
->pkey
.dsa
->p
) ||
386 BN_cmp(a
->pkey
.dsa
->q
,b
->pkey
.dsa
->q
) ||
387 BN_cmp(a
->pkey
.dsa
->g
,b
->pkey
.dsa
->g
))
393 static void int_dsa_free(EVP_PKEY
*pkey
)
395 DSA_free(pkey
->pkey
.dsa
);
398 static void update_buflen(const BIGNUM
*b
, size_t *pbuflen
)
403 if (*pbuflen
< (i
= (size_t)BN_num_bytes(b
)))
407 int do_dsa_print(BIO
*bp
, const DSA
*x
, int off
, int ptype
)
409 unsigned char *m
=NULL
;
412 const char *ktype
= NULL
;
414 const BIGNUM
*priv_key
, *pub_key
;
417 priv_key
= x
->priv_key
;
422 pub_key
= x
->pub_key
;
427 ktype
= "Private-Key";
429 ktype
= "Public-Key";
431 ktype
= "DSA-Parameters";
435 DSAerr(DSA_F_DSA_PRINT
,DSA_R_MISSING_PARAMETERS
);
439 update_buflen(x
->p
, &buf_len
);
440 update_buflen(x
->q
, &buf_len
);
441 update_buflen(x
->g
, &buf_len
);
442 update_buflen(priv_key
, &buf_len
);
443 update_buflen(pub_key
, &buf_len
);
445 m
=(unsigned char *)OPENSSL_malloc(buf_len
+10);
448 DSAerr(DSA_F_DSA_PRINT
,ERR_R_MALLOC_FAILURE
);
454 if(!BIO_indent(bp
,off
,128))
456 if (BIO_printf(bp
,"%s: (%d bit)\n",ktype
, BN_num_bits(x
->p
))
460 if (!ASN1_bn_print(bp
,"priv:",priv_key
,m
,off
))
462 if (!ASN1_bn_print(bp
,"pub: ",pub_key
,m
,off
))
464 if (!ASN1_bn_print(bp
,"P: ",x
->p
,m
,off
)) goto err
;
465 if (!ASN1_bn_print(bp
,"Q: ",x
->q
,m
,off
)) goto err
;
466 if (!ASN1_bn_print(bp
,"G: ",x
->g
,m
,off
)) goto err
;
469 if (m
!= NULL
) OPENSSL_free(m
);
473 static int dsa_param_decode(EVP_PKEY
*pkey
,
474 const unsigned char **pder
, int derlen
)
477 if (!(dsa
= d2i_DSAparams(NULL
, pder
, derlen
)))
479 DSAerr(DSA_F_DSA_PARAM_DECODE
, ERR_R_DSA_LIB
);
482 EVP_PKEY_assign_DSA(pkey
, dsa
);
486 static int dsa_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
488 return i2d_DSAparams(pkey
->pkey
.dsa
, pder
);
491 static int dsa_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
494 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 0);
497 static int dsa_pub_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
500 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 1);
504 static int dsa_priv_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
507 return do_dsa_print(bp
, pkey
->pkey
.dsa
, indent
, 2);
510 static int old_dsa_priv_decode(EVP_PKEY
*pkey
,
511 const unsigned char **pder
, int derlen
)
514 if (!(dsa
= d2i_DSAPrivateKey (NULL
, pder
, derlen
)))
516 DSAerr(DSA_F_DSA_PRIV_DECODE
, ERR_R_DSA_LIB
);
519 EVP_PKEY_assign_DSA(pkey
, dsa
);
523 static int old_dsa_priv_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
525 return i2d_DSAPrivateKey(pkey
->pkey
.dsa
, pder
);
528 /* NB these are sorted in pkey_id order, lowest first */
530 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths
[] =
563 "OpenSSL DSA method",
579 dsa_missing_parameters
,