1 /* Written by Dr Stephen N Henson (steve@openssl.org) 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/dh.h>
63 #include <openssl/bn.h>
64 #include "asn1_locl.h"
66 extern const EVP_PKEY_ASN1_METHOD dhx_asn1_meth
;
68 /* i2d/d2i like DH parameter functions which use the appropriate routine
69 * for PKCS#3 DH or X9.42 DH.
72 static DH
* d2i_dhp(const EVP_PKEY
*pkey
, const unsigned char **pp
, long length
)
74 if (pkey
->ameth
== &dhx_asn1_meth
)
75 return d2i_DHxparams(NULL
, pp
, length
);
76 return d2i_DHparams(NULL
, pp
, length
);
79 static int i2d_dhp(const EVP_PKEY
*pkey
, const DH
*a
, unsigned char **pp
)
81 if (pkey
->ameth
== &dhx_asn1_meth
)
82 return i2d_DHxparams(a
, pp
);
83 return i2d_DHparams(a
, pp
);
86 static void int_dh_free(EVP_PKEY
*pkey
)
88 DH_free(pkey
->pkey
.dh
);
91 static int dh_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
93 const unsigned char *p
, *pm
;
99 ASN1_INTEGER
*public_key
= NULL
;
103 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, &palg
, pubkey
))
105 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
107 if (ptype
!= V_ASN1_SEQUENCE
)
109 DHerr(DH_F_DH_PUB_DECODE
, DH_R_PARAMETER_ENCODING_ERROR
);
115 pmlen
= pstr
->length
;
117 if (!(dh
= d2i_dhp(pkey
, &pm
, pmlen
)))
119 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
123 if (!(public_key
=d2i_ASN1_INTEGER(NULL
, &p
, pklen
)))
125 DHerr(DH_F_DH_PUB_DECODE
, DH_R_DECODE_ERROR
);
129 /* We have parameters now set public key */
130 if (!(dh
->pub_key
= ASN1_INTEGER_to_BN(public_key
, NULL
)))
132 DHerr(DH_F_DH_PUB_DECODE
, DH_R_BN_DECODE_ERROR
);
136 ASN1_INTEGER_free(public_key
);
137 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
142 ASN1_INTEGER_free(public_key
);
149 static int dh_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
154 unsigned char *penc
= NULL
;
157 ASN1_INTEGER
*pub_key
= NULL
;
161 str
= ASN1_STRING_new();
162 str
->length
= i2d_dhp(pkey
, dh
, &str
->data
);
163 if (str
->length
<= 0)
165 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
169 ptype
= V_ASN1_SEQUENCE
;
171 pub_key
= BN_to_ASN1_INTEGER(dh
->pub_key
, NULL
);
175 penclen
= i2d_ASN1_INTEGER(pub_key
, &penc
);
177 ASN1_INTEGER_free(pub_key
);
181 DHerr(DH_F_DH_PUB_ENCODE
, ERR_R_MALLOC_FAILURE
);
185 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(pkey
->ameth
->pkey_id
),
186 ptype
, pval
, penc
, penclen
))
193 ASN1_STRING_free(pval
);
199 /* PKCS#8 DH is defined in PKCS#11 of all places. It is similar to DH in
200 * that the AlgorithmIdentifier contains the paramaters, the private key
201 * is explcitly included and the pubkey must be recalculated.
204 static int dh_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
206 const unsigned char *p
, *pm
;
212 ASN1_INTEGER
*privkey
= NULL
;
216 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, &palg
, p8
))
219 X509_ALGOR_get0(NULL
, &ptype
, &pval
, palg
);
221 if (ptype
!= V_ASN1_SEQUENCE
)
224 if (!(privkey
=d2i_ASN1_INTEGER(NULL
, &p
, pklen
)))
230 pmlen
= pstr
->length
;
231 if (!(dh
= d2i_dhp(pkey
, &pm
, pmlen
)))
233 /* We have parameters now set private key */
234 if (!(dh
->priv_key
= ASN1_INTEGER_to_BN(privkey
, NULL
)))
236 DHerr(DH_F_DH_PRIV_DECODE
,DH_R_BN_ERROR
);
239 /* Calculate public key */
240 if (!DH_generate_key(dh
))
243 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
245 ASN1_INTEGER_free(privkey
);
250 DHerr(DH_F_DH_PRIV_DECODE
, EVP_R_DECODE_ERROR
);
256 static int dh_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
258 ASN1_STRING
*params
= NULL
;
259 ASN1_INTEGER
*prkey
= NULL
;
260 unsigned char *dp
= NULL
;
263 params
= ASN1_STRING_new();
267 DHerr(DH_F_DH_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
271 params
->length
= i2d_dhp(pkey
, pkey
->pkey
.dh
, ¶ms
->data
);
272 if (params
->length
<= 0)
274 DHerr(DH_F_DH_PRIV_ENCODE
,ERR_R_MALLOC_FAILURE
);
277 params
->type
= V_ASN1_SEQUENCE
;
279 /* Get private key into integer */
280 prkey
= BN_to_ASN1_INTEGER(pkey
->pkey
.dh
->priv_key
, NULL
);
284 DHerr(DH_F_DH_PRIV_ENCODE
,DH_R_BN_ERROR
);
288 dplen
= i2d_ASN1_INTEGER(prkey
, &dp
);
290 ASN1_INTEGER_free(prkey
);
292 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(pkey
->ameth
->pkey_id
), 0,
293 V_ASN1_SEQUENCE
, params
, dp
, dplen
))
302 ASN1_STRING_free(params
);
304 ASN1_INTEGER_free(prkey
);
309 static void update_buflen(const BIGNUM
*b
, size_t *pbuflen
)
314 if (*pbuflen
< (i
= (size_t)BN_num_bytes(b
)))
318 static int dh_param_decode(EVP_PKEY
*pkey
,
319 const unsigned char **pder
, int derlen
)
322 if (!(dh
= d2i_dhp(pkey
, pder
, derlen
)))
324 DHerr(DH_F_DH_PARAM_DECODE
, ERR_R_DH_LIB
);
327 EVP_PKEY_assign(pkey
, pkey
->ameth
->pkey_id
, dh
);
331 static int dh_param_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
333 return i2d_dhp(pkey
, pkey
->pkey
.dh
, pder
);
336 static int do_dh_print(BIO
*bp
, const DH
*x
, int indent
,
337 ASN1_PCTX
*ctx
, int ptype
)
339 unsigned char *m
=NULL
;
340 int reason
=ERR_R_BUF_LIB
,ret
=0;
343 const char *ktype
= NULL
;
345 BIGNUM
*priv_key
, *pub_key
;
348 priv_key
= x
->priv_key
;
353 pub_key
= x
->pub_key
;
357 update_buflen(x
->p
, &buf_len
);
361 reason
= ERR_R_PASSED_NULL_PARAMETER
;
365 update_buflen(x
->g
, &buf_len
);
366 update_buflen(x
->q
, &buf_len
);
367 update_buflen(x
->j
, &buf_len
);
368 update_buflen(x
->counter
, &buf_len
);
369 update_buflen(pub_key
, &buf_len
);
370 update_buflen(priv_key
, &buf_len
);
373 ktype
= "DH Private-Key";
375 ktype
= "DH Public-Key";
377 ktype
= "DH Parameters";
379 m
= OPENSSL_malloc(buf_len
+10);
382 reason
=ERR_R_MALLOC_FAILURE
;
386 BIO_indent(bp
, indent
, 128);
387 if (BIO_printf(bp
,"%s: (%d bit)\n", ktype
, BN_num_bits(x
->p
)) <= 0)
391 if (!ASN1_bn_print(bp
,"private-key:",priv_key
,m
,indent
)) goto err
;
392 if (!ASN1_bn_print(bp
,"public-key:",pub_key
,m
,indent
)) goto err
;
394 if (!ASN1_bn_print(bp
,"prime:",x
->p
,m
,indent
)) goto err
;
395 if (!ASN1_bn_print(bp
,"generator:",x
->g
,m
,indent
)) goto err
;
396 if (x
->q
&& !ASN1_bn_print(bp
,"subgroup order:",x
->q
,m
,indent
)) goto err
;
397 if (x
->j
&& !ASN1_bn_print(bp
,"subgroup factor:",x
->j
,m
,indent
))
402 BIO_indent(bp
, indent
, 128);
403 BIO_puts(bp
, "seed:");
404 for (i
=0; i
< x
->seedlen
; i
++)
408 if(BIO_puts(bp
,"\n") <= 0
409 || !BIO_indent(bp
,indent
+4,128))
412 if (BIO_printf(bp
,"%02x%s", x
->seed
[i
],
413 ((i
+1) == x
->seedlen
)?"":":") <= 0)
416 if (BIO_write(bp
,"\n",1) <= 0) return(0);
418 if (x
->counter
&& !ASN1_bn_print(bp
,"counter:",x
->counter
,m
,indent
))
422 BIO_indent(bp
, indent
, 128);
423 if (BIO_printf(bp
,"recommended-private-length: %d bits\n",
424 (int)x
->length
) <= 0) goto err
;
432 DHerr(DH_F_DO_DH_PRINT
,reason
);
434 if (m
!= NULL
) OPENSSL_free(m
);
438 static int int_dh_size(const EVP_PKEY
*pkey
)
440 return(DH_size(pkey
->pkey
.dh
));
443 static int dh_bits(const EVP_PKEY
*pkey
)
445 return BN_num_bits(pkey
->pkey
.dh
->p
);
448 static int dh_cmp_parameters(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
450 if ( BN_cmp(a
->pkey
.dh
->p
,b
->pkey
.dh
->p
) ||
451 BN_cmp(a
->pkey
.dh
->g
,b
->pkey
.dh
->g
))
453 else if (a
->ameth
== &dhx_asn1_meth
)
455 if (BN_cmp(a
->pkey
.dh
->q
,b
->pkey
.dh
->q
))
461 static int int_dh_bn_cpy(BIGNUM
**dst
, const BIGNUM
*src
)
478 static int int_dh_param_copy(DH
*to
, const DH
*from
, int is_x942
)
482 if (!int_dh_bn_cpy(&to
->p
, from
->p
))
484 if (!int_dh_bn_cpy(&to
->g
, from
->g
))
488 if (!int_dh_bn_cpy(&to
->q
, from
->q
))
490 if (!int_dh_bn_cpy(&to
->j
, from
->j
))
494 OPENSSL_free(to
->seed
);
500 to
->seed
= BUF_memdup(from
->seed
, from
->seedlen
);
503 to
->seedlen
= from
->seedlen
;
507 to
->length
= from
->length
;
512 DH
*DHparams_dup(DH
*dh
)
518 if (!int_dh_param_copy(ret
, dh
, -1))
526 static int dh_copy_parameters(EVP_PKEY
*to
, const EVP_PKEY
*from
)
528 return int_dh_param_copy(to
->pkey
.dh
, from
->pkey
.dh
,
529 from
->ameth
== &dhx_asn1_meth
);
532 static int dh_missing_parameters(const EVP_PKEY
*a
)
534 if (!a
->pkey
.dh
->p
|| !a
->pkey
.dh
->g
)
539 static int dh_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
541 if (dh_cmp_parameters(a
, b
) == 0)
543 if (BN_cmp(b
->pkey
.dh
->pub_key
,a
->pkey
.dh
->pub_key
) != 0)
549 static int dh_param_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
552 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, ctx
, 0);
555 static int dh_public_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
558 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, ctx
, 1);
561 static int dh_private_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
564 return do_dh_print(bp
, pkey
->pkey
.dh
, indent
, ctx
, 2);
567 int DHparams_print(BIO
*bp
, const DH
*x
)
569 return do_dh_print(bp
, x
, 4, NULL
, 0);
572 const EVP_PKEY_ASN1_METHOD dh_asn1_meth
=
579 "OpenSSL PKCS#3 DH method",
595 dh_missing_parameters
,
605 const EVP_PKEY_ASN1_METHOD dhx_asn1_meth
=
612 "OpenSSL X9.42 DH method",
628 dh_missing_parameters
,