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/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 const unsigned char *q = p;
241 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
243 if (privkey->type == V_ASN1_NEG_INTEGER)
245 p8->broken = PKCS8_NEG_PRIVKEY;
246 ASN1_INTEGER_free(privkey);
247 if (!(privkey=d2i_ASN1_UINTEGER(NULL, &q, pklen)))
250 if (ptype != V_ASN1_SEQUENCE)
256 pmlen = pstr->length;
257 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
259 /* We have parameters now set private key */
260 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
262 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
265 /* Calculate public key */
266 if (!(dsa->pub_key = BN_new()))
268 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
271 if (!(ctx = BN_CTX_new()))
273 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
277 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
279 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
283 EVP_PKEY_assign_DSA(pkey, dsa);
286 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
288 ASN1_INTEGER_free(privkey);
293 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
297 ASN1_INTEGER_free(privkey);
298 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
303 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
305 ASN1_STRING *params = NULL;
306 ASN1_INTEGER *prkey = NULL;
307 unsigned char *dp = NULL;
310 params = ASN1_STRING_new();
314 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
318 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
319 if (params->length <= 0)
321 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
324 params->type = V_ASN1_SEQUENCE;
326 /* Get private key into integer */
327 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
331 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
335 dplen = i2d_ASN1_INTEGER(prkey, &dp);
337 ASN1_INTEGER_free(prkey);
339 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
340 V_ASN1_SEQUENCE, params, dp, dplen))
349 ASN1_STRING_free(params);
351 ASN1_INTEGER_free(prkey);
355 static int int_dsa_size(const EVP_PKEY *pkey)
357 return(DSA_size(pkey->pkey.dsa));
360 static int dsa_bits(const EVP_PKEY *pkey)
362 return BN_num_bits(pkey->pkey.dsa->p);
365 static int dsa_missing_parameters(const EVP_PKEY *pkey)
369 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
374 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
378 if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
380 if (to->pkey.dsa->p != NULL)
381 BN_free(to->pkey.dsa->p);
384 if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
386 if (to->pkey.dsa->q != NULL)
387 BN_free(to->pkey.dsa->q);
390 if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
392 if (to->pkey.dsa->g != NULL)
393 BN_free(to->pkey.dsa->g);
398 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
400 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
401 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
402 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
408 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
410 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
416 static void int_dsa_free(EVP_PKEY *pkey)
418 DSA_free(pkey->pkey.dsa);
421 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
426 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
430 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
432 unsigned char *m=NULL;
435 const char *ktype = NULL;
437 const BIGNUM *priv_key, *pub_key;
440 priv_key = x->priv_key;
445 pub_key = x->pub_key;
450 ktype = "Private-Key";
452 ktype = "Public-Key";
454 ktype = "DSA-Parameters";
456 update_buflen(x->p, &buf_len);
457 update_buflen(x->q, &buf_len);
458 update_buflen(x->g, &buf_len);
459 update_buflen(priv_key, &buf_len);
460 update_buflen(pub_key, &buf_len);
462 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
465 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
471 if(!BIO_indent(bp,off,128))
473 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
477 if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
479 if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
481 if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
482 if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
483 if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
486 if (m != NULL) OPENSSL_free(m);
490 static int dsa_param_decode(EVP_PKEY *pkey,
491 const unsigned char **pder, int derlen)
494 if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
496 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
499 EVP_PKEY_assign_DSA(pkey, dsa);
503 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
505 return i2d_DSAparams(pkey->pkey.dsa, pder);
508 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
511 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
514 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
517 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
521 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
524 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
527 static int old_dsa_priv_decode(EVP_PKEY *pkey,
528 const unsigned char **pder, int derlen)
531 if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
533 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
536 EVP_PKEY_assign_DSA(pkey, dsa);
540 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
542 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
545 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
549 case ASN1_PKEY_CTRL_PKCS7_SIGN:
553 X509_ALGOR *alg1, *alg2;
554 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
555 if (alg1 == NULL || alg1->algorithm == NULL)
557 hnid = OBJ_obj2nid(alg1->algorithm);
558 if (hnid == NID_undef)
560 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
562 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
565 #ifndef OPENSSL_NO_CMS
566 case ASN1_PKEY_CTRL_CMS_SIGN:
570 X509_ALGOR *alg1, *alg2;
571 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
572 if (alg1 == NULL || alg1->algorithm == NULL)
574 hnid = OBJ_obj2nid(alg1->algorithm);
575 if (hnid == NID_undef)
577 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
579 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
584 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
585 *(int *)arg2 = NID_sha1;
595 /* NB these are sorted in pkey_id order, lowest first */
597 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
630 "OpenSSL DSA method",
646 dsa_missing_parameters,