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);
82 if (ptype == V_ASN1_SEQUENCE)
88 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
90 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
95 else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF))
97 if (!(dsa = DSA_new()))
99 DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
105 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
109 if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
111 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
115 if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
117 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
121 ASN1_INTEGER_free(public_key);
122 EVP_PKEY_assign_DSA(pkey, dsa);
127 ASN1_INTEGER_free(public_key);
134 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
139 unsigned char *penc = NULL;
143 if (pkey->save_parameters && dsa->p && dsa->q && dsa->g)
146 str = ASN1_STRING_new();
147 str->length = i2d_DSAparams(dsa, &str->data);
148 if (str->length <= 0)
150 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
154 ptype = V_ASN1_SEQUENCE;
157 ptype = V_ASN1_UNDEF;
161 penclen = i2d_DSAPublicKey(dsa, &penc);
165 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
169 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
170 ptype, pval, penc, penclen))
177 ASN1_STRING_free(pval);
182 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
183 * AlgorithmIdentifier the pubkey must be recalculated.
186 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
188 const unsigned char *p, *pm;
194 ASN1_INTEGER *privkey = NULL;
197 STACK_OF(ASN1_TYPE) *ndsa = NULL;
200 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
202 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
204 /* Check for broken DSA PKCS#8, UGH! */
205 if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
208 if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)));
210 if (sk_ASN1_TYPE_num(ndsa) != 2)
212 /* Handle Two broken types:
213 * SEQUENCE {parameters, priv_key}
214 * SEQUENCE {pub_key, priv_key}
217 t1 = sk_ASN1_TYPE_value(ndsa, 0);
218 t2 = sk_ASN1_TYPE_value(ndsa, 1);
219 if (t1->type == V_ASN1_SEQUENCE)
221 p8->broken = PKCS8_EMBEDDED_PARAM;
222 pval = t1->value.ptr;
224 else if (ptype == V_ASN1_SEQUENCE)
225 p8->broken = PKCS8_NS_DB;
229 if (t2->type != V_ASN1_INTEGER)
232 privkey = t2->value.integer;
236 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
238 if (ptype != V_ASN1_SEQUENCE)
244 pmlen = pstr->length;
245 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
247 /* We have parameters now set private key */
248 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
250 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
253 /* Calculate public key */
254 if (!(dsa->pub_key = BN_new()))
256 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
259 if (!(ctx = BN_CTX_new()))
261 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
265 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
267 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
271 EVP_PKEY_assign_DSA(pkey, dsa);
274 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
276 ASN1_INTEGER_free(privkey);
281 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
285 ASN1_INTEGER_free(privkey);
286 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
291 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
293 ASN1_STRING *params = NULL;
294 ASN1_INTEGER *prkey = NULL;
295 unsigned char *dp = NULL;
298 params = ASN1_STRING_new();
302 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
306 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
307 if (params->length <= 0)
309 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
312 params->type = V_ASN1_SEQUENCE;
314 /* Get private key into integer */
315 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
319 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
323 dplen = i2d_ASN1_INTEGER(prkey, &dp);
325 ASN1_INTEGER_free(prkey);
327 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
328 V_ASN1_SEQUENCE, params, dp, dplen))
337 ASN1_STRING_free(params);
339 ASN1_INTEGER_free(prkey);
343 static int int_dsa_size(const EVP_PKEY *pkey)
345 return(DSA_size(pkey->pkey.dsa));
348 static int dsa_bits(const EVP_PKEY *pkey)
350 return BN_num_bits(pkey->pkey.dsa->p);
353 static int dsa_missing_parameters(const EVP_PKEY *pkey)
357 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
362 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
366 if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
368 if (to->pkey.dsa->p != NULL)
369 BN_free(to->pkey.dsa->p);
372 if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
374 if (to->pkey.dsa->q != NULL)
375 BN_free(to->pkey.dsa->q);
378 if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
380 if (to->pkey.dsa->g != NULL)
381 BN_free(to->pkey.dsa->g);
386 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
388 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
389 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
390 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
396 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
398 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
404 static void int_dsa_free(EVP_PKEY *pkey)
406 DSA_free(pkey->pkey.dsa);
409 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
414 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
418 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
420 unsigned char *m=NULL;
423 const char *ktype = NULL;
425 const BIGNUM *priv_key, *pub_key;
428 priv_key = x->priv_key;
433 pub_key = x->pub_key;
438 ktype = "Private-Key";
440 ktype = "Public-Key";
442 ktype = "DSA-Parameters";
444 update_buflen(x->p, &buf_len);
445 update_buflen(x->q, &buf_len);
446 update_buflen(x->g, &buf_len);
447 update_buflen(priv_key, &buf_len);
448 update_buflen(pub_key, &buf_len);
450 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
453 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
459 if(!BIO_indent(bp,off,128))
461 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
465 if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
467 if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
469 if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
470 if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
471 if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
474 if (m != NULL) OPENSSL_free(m);
478 static int dsa_param_decode(EVP_PKEY *pkey,
479 const unsigned char **pder, int derlen)
482 if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
484 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
487 EVP_PKEY_assign_DSA(pkey, dsa);
491 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
493 return i2d_DSAparams(pkey->pkey.dsa, pder);
496 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
499 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
502 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
505 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
509 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
512 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
515 static int old_dsa_priv_decode(EVP_PKEY *pkey,
516 const unsigned char **pder, int derlen)
519 if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
521 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
524 EVP_PKEY_assign_DSA(pkey, dsa);
528 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
530 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
533 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
537 case ASN1_PKEY_CTRL_PKCS7_SIGN:
541 X509_ALGOR *alg1, *alg2;
542 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
543 if (alg1 == NULL || alg1->algorithm == NULL)
545 hnid = OBJ_obj2nid(alg1->algorithm);
546 if (hnid == NID_undef)
548 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
550 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
554 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
555 *(int *)arg2 = NID_sha1;
565 /* NB these are sorted in pkey_id order, lowest first */
567 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
600 "OpenSSL DSA method",
616 dsa_missing_parameters,