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 #ifndef OPENSSL_NO_CMS
64 #include <openssl/cms.h>
66 #include "asn1_locl.h"
68 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
70 const unsigned char *p, *pm;
76 ASN1_INTEGER *public_key = NULL;
80 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
82 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
85 if (ptype == V_ASN1_SEQUENCE)
91 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
93 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
98 else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF))
100 if (!(dsa = DSA_new()))
102 DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
108 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
112 if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
114 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
118 if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
120 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
124 ASN1_INTEGER_free(public_key);
125 EVP_PKEY_assign_DSA(pkey, dsa);
130 ASN1_INTEGER_free(public_key);
137 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
142 unsigned char *penc = NULL;
146 if (pkey->save_parameters && dsa->p && dsa->q && dsa->g)
149 str = ASN1_STRING_new();
150 str->length = i2d_DSAparams(dsa, &str->data);
151 if (str->length <= 0)
153 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
157 ptype = V_ASN1_SEQUENCE;
160 ptype = V_ASN1_UNDEF;
164 penclen = i2d_DSAPublicKey(dsa, &penc);
168 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
172 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
173 ptype, pval, penc, penclen))
180 ASN1_STRING_free(pval);
185 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
186 * AlgorithmIdentifier the pubkey must be recalculated.
189 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
191 const unsigned char *p, *pm;
197 ASN1_INTEGER *privkey = NULL;
200 STACK_OF(ASN1_TYPE) *ndsa = NULL;
203 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
205 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
207 /* Check for broken DSA PKCS#8, UGH! */
208 if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
211 if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)));
213 if (sk_ASN1_TYPE_num(ndsa) != 2)
215 /* Handle Two broken types:
216 * SEQUENCE {parameters, priv_key}
217 * SEQUENCE {pub_key, priv_key}
220 t1 = sk_ASN1_TYPE_value(ndsa, 0);
221 t2 = sk_ASN1_TYPE_value(ndsa, 1);
222 if (t1->type == V_ASN1_SEQUENCE)
224 p8->broken = PKCS8_EMBEDDED_PARAM;
225 pval = t1->value.ptr;
227 else if (ptype == V_ASN1_SEQUENCE)
228 p8->broken = PKCS8_NS_DB;
232 if (t2->type != V_ASN1_INTEGER)
235 privkey = t2->value.integer;
239 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
241 if (ptype != V_ASN1_SEQUENCE)
247 pmlen = pstr->length;
248 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
250 /* We have parameters now set private key */
251 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
253 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
256 /* Calculate public key */
257 if (!(dsa->pub_key = BN_new()))
259 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
262 if (!(ctx = BN_CTX_new()))
264 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
268 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
270 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
274 EVP_PKEY_assign_DSA(pkey, dsa);
277 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
279 ASN1_INTEGER_free(privkey);
284 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
288 ASN1_INTEGER_free(privkey);
289 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
294 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
296 ASN1_STRING *params = NULL;
297 ASN1_INTEGER *prkey = NULL;
298 unsigned char *dp = NULL;
301 params = ASN1_STRING_new();
305 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
309 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
310 if (params->length <= 0)
312 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
315 params->type = V_ASN1_SEQUENCE;
317 /* Get private key into integer */
318 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
322 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
326 dplen = i2d_ASN1_INTEGER(prkey, &dp);
328 ASN1_INTEGER_free(prkey);
330 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
331 V_ASN1_SEQUENCE, params, dp, dplen))
340 ASN1_STRING_free(params);
342 ASN1_INTEGER_free(prkey);
346 static int int_dsa_size(const EVP_PKEY *pkey)
348 return(DSA_size(pkey->pkey.dsa));
351 static int dsa_bits(const EVP_PKEY *pkey)
353 return BN_num_bits(pkey->pkey.dsa->p);
356 static int dsa_missing_parameters(const EVP_PKEY *pkey)
360 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
365 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
369 if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
371 if (to->pkey.dsa->p != NULL)
372 BN_free(to->pkey.dsa->p);
375 if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
377 if (to->pkey.dsa->q != NULL)
378 BN_free(to->pkey.dsa->q);
381 if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
383 if (to->pkey.dsa->g != NULL)
384 BN_free(to->pkey.dsa->g);
389 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
391 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
392 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
393 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
399 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
401 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
407 static void int_dsa_free(EVP_PKEY *pkey)
409 DSA_free(pkey->pkey.dsa);
412 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
417 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
421 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
423 unsigned char *m=NULL;
426 const char *ktype = NULL;
428 const BIGNUM *priv_key, *pub_key;
431 priv_key = x->priv_key;
436 pub_key = x->pub_key;
441 ktype = "Private-Key";
443 ktype = "Public-Key";
445 ktype = "DSA-Parameters";
447 update_buflen(x->p, &buf_len);
448 update_buflen(x->q, &buf_len);
449 update_buflen(x->g, &buf_len);
450 update_buflen(priv_key, &buf_len);
451 update_buflen(pub_key, &buf_len);
453 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
456 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
462 if(!BIO_indent(bp,off,128))
464 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
468 if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
470 if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
472 if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
473 if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
474 if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
477 if (m != NULL) OPENSSL_free(m);
481 static int dsa_param_decode(EVP_PKEY *pkey,
482 const unsigned char **pder, int derlen)
485 if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
487 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
490 EVP_PKEY_assign_DSA(pkey, dsa);
494 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
496 return i2d_DSAparams(pkey->pkey.dsa, pder);
499 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
502 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
505 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
508 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
512 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
515 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
518 static int old_dsa_priv_decode(EVP_PKEY *pkey,
519 const unsigned char **pder, int derlen)
522 if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
524 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
527 EVP_PKEY_assign_DSA(pkey, dsa);
531 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
533 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
536 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
540 case ASN1_PKEY_CTRL_PKCS7_SIGN:
544 X509_ALGOR *alg1, *alg2;
545 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
546 if (alg1 == NULL || alg1->algorithm == NULL)
548 hnid = OBJ_obj2nid(alg1->algorithm);
549 if (hnid == NID_undef)
551 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
553 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
556 #ifndef OPENSSL_NO_CMS
557 case ASN1_PKEY_CTRL_CMS_SIGN:
561 X509_ALGOR *alg1, *alg2;
562 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
563 if (alg1 == NULL || alg1->algorithm == NULL)
565 hnid = OBJ_obj2nid(alg1->algorithm);
566 if (hnid == NID_undef)
568 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
570 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
575 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
576 *(int *)arg2 = NID_sha1;
586 /* NB these are sorted in pkey_id order, lowest first */
588 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
621 "OpenSSL DSA method",
637 dsa_missing_parameters,