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 if (!pkey->pkey.dsa->priv_key)
312 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_MISSING_PARAMETERS);
316 params = ASN1_STRING_new();
320 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
324 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
325 if (params->length <= 0)
327 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
330 params->type = V_ASN1_SEQUENCE;
332 /* Get private key into integer */
333 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
337 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
341 dplen = i2d_ASN1_INTEGER(prkey, &dp);
343 ASN1_INTEGER_free(prkey);
345 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
346 V_ASN1_SEQUENCE, params, dp, dplen))
355 ASN1_STRING_free(params);
357 ASN1_INTEGER_free(prkey);
361 static int int_dsa_size(const EVP_PKEY *pkey)
363 return(DSA_size(pkey->pkey.dsa));
366 static int dsa_bits(const EVP_PKEY *pkey)
368 return BN_num_bits(pkey->pkey.dsa->p);
371 static int dsa_security_bits(const EVP_PKEY *pkey)
373 return DSA_security_bits(pkey->pkey.dsa);
376 static int dsa_missing_parameters(const EVP_PKEY *pkey)
380 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
385 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
389 if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
391 if (to->pkey.dsa->p != NULL)
392 BN_free(to->pkey.dsa->p);
395 if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
397 if (to->pkey.dsa->q != NULL)
398 BN_free(to->pkey.dsa->q);
401 if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
403 if (to->pkey.dsa->g != NULL)
404 BN_free(to->pkey.dsa->g);
409 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
411 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
412 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
413 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
419 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
421 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
427 static void int_dsa_free(EVP_PKEY *pkey)
429 DSA_free(pkey->pkey.dsa);
432 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
437 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
441 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
443 unsigned char *m=NULL;
446 const char *ktype = NULL;
448 const BIGNUM *priv_key, *pub_key;
451 priv_key = x->priv_key;
456 pub_key = x->pub_key;
461 ktype = "Private-Key";
463 ktype = "Public-Key";
465 ktype = "DSA-Parameters";
467 update_buflen(x->p, &buf_len);
468 update_buflen(x->q, &buf_len);
469 update_buflen(x->g, &buf_len);
470 update_buflen(priv_key, &buf_len);
471 update_buflen(pub_key, &buf_len);
473 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
476 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
482 if(!BIO_indent(bp,off,128))
484 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
488 if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
490 if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
492 if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
493 if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
494 if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
497 if (m != NULL) OPENSSL_free(m);
501 static int dsa_param_decode(EVP_PKEY *pkey,
502 const unsigned char **pder, int derlen)
505 if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
507 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
510 EVP_PKEY_assign_DSA(pkey, dsa);
514 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
516 return i2d_DSAparams(pkey->pkey.dsa, pder);
519 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
522 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
525 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
528 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
532 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
535 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
538 static int old_dsa_priv_decode(EVP_PKEY *pkey,
539 const unsigned char **pder, int derlen)
542 if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
544 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
547 EVP_PKEY_assign_DSA(pkey, dsa);
551 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
553 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
556 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
557 const ASN1_STRING *sig,
558 int indent, ASN1_PCTX *pctx)
561 const unsigned char *p;
564 if (BIO_puts(bp, "\n") <= 0)
570 dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
575 unsigned char *m=NULL;
576 update_buflen(dsa_sig->r, &buf_len);
577 update_buflen(dsa_sig->s, &buf_len);
578 m = OPENSSL_malloc(buf_len+10);
581 DSAerr(DSA_F_DSA_SIG_PRINT,ERR_R_MALLOC_FAILURE);
585 if (BIO_write(bp, "\n", 1) != 1)
588 if (!ASN1_bn_print(bp,"r: ",dsa_sig->r,m,indent))
590 if (!ASN1_bn_print(bp,"s: ",dsa_sig->s,m,indent))
596 DSA_SIG_free(dsa_sig);
599 return X509_signature_dump(bp, sig, indent);
602 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
606 case ASN1_PKEY_CTRL_PKCS7_SIGN:
610 X509_ALGOR *alg1, *alg2;
611 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
612 if (alg1 == NULL || alg1->algorithm == NULL)
614 hnid = OBJ_obj2nid(alg1->algorithm);
615 if (hnid == NID_undef)
617 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
619 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
622 #ifndef OPENSSL_NO_CMS
623 case ASN1_PKEY_CTRL_CMS_SIGN:
627 X509_ALGOR *alg1, *alg2;
628 CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
629 if (alg1 == NULL || alg1->algorithm == NULL)
631 hnid = OBJ_obj2nid(alg1->algorithm);
632 if (hnid == NID_undef)
634 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
636 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
640 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
641 *(int *)arg2 = CMS_RECIPINFO_NONE;
645 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
646 *(int *)arg2 = NID_sha1;
656 /* NB these are sorted in pkey_id order, lowest first */
658 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
691 "OpenSSL DSA method",
708 dsa_missing_parameters,