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);
81 if (ptype != V_ASN1_SEQUENCE)
83 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
91 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
93 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
97 if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
99 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
103 /* We have parameters now set public key */
104 if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
106 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
110 ASN1_INTEGER_free(public_key);
111 EVP_PKEY_assign_DSA(pkey, dsa);
116 ASN1_INTEGER_free(public_key);
123 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
128 unsigned char *penc = NULL;
132 if (pkey->save_parameters)
135 str = ASN1_STRING_new();
136 str->length = i2d_DSAparams(dsa, &str->data);
137 if (str->length <= 0)
139 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
143 ptype = V_ASN1_SEQUENCE;
146 ptype = V_ASN1_UNDEF;
149 penclen = i2d_DSAPublicKey(dsa, &penc);
153 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
157 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
158 ptype, pval, penc, penclen))
165 ASN1_STRING_free(pval);
170 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
172 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
178 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
179 * AlgorithmIdentifier the pubkey must be recalculated.
182 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
184 const unsigned char *p, *pm;
190 ASN1_INTEGER *privkey = NULL;
193 STACK_OF(ASN1_TYPE) *ndsa = NULL;
196 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
198 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
200 /* Check for broken DSA PKCS#8, UGH! */
201 if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
204 if(!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pklen,
208 if (sk_ASN1_TYPE_num(ndsa) != 2)
210 /* Handle Two broken types:
211 * SEQUENCE {parameters, priv_key}
212 * SEQUENCE {pub_key, priv_key}
215 t1 = sk_ASN1_TYPE_value(ndsa, 0);
216 t2 = sk_ASN1_TYPE_value(ndsa, 1);
217 if (t1->type == V_ASN1_SEQUENCE)
219 p8->broken = PKCS8_EMBEDDED_PARAM;
220 pval = t1->value.ptr;
222 else if (ptype == V_ASN1_SEQUENCE)
223 p8->broken = PKCS8_NS_DB;
227 if (t2->type != V_ASN1_INTEGER)
230 privkey = t2->value.integer;
234 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
236 if (ptype != V_ASN1_SEQUENCE)
242 pmlen = pstr->length;
243 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
245 /* We have parameters now set private key */
246 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
248 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
251 /* Calculate public key */
252 if (!(dsa->pub_key = BN_new()))
254 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
257 if (!(ctx = BN_CTX_new()))
259 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
263 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
265 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
269 EVP_PKEY_assign_DSA(pkey, dsa);
272 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
274 ASN1_INTEGER_free(privkey);
279 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
282 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
288 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
290 ASN1_STRING *params = NULL;
291 ASN1_INTEGER *prkey = NULL;
292 unsigned char *dp = NULL;
295 params = ASN1_STRING_new();
299 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
303 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
304 if (params->length <= 0)
306 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
309 params->type = V_ASN1_SEQUENCE;
311 /* Get private key into integer */
312 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
316 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
320 dplen = i2d_ASN1_INTEGER(prkey, &dp);
322 ASN1_INTEGER_free(prkey);
324 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
325 V_ASN1_SEQUENCE, params, dp, dplen))
334 ASN1_STRING_free(params);
336 ASN1_INTEGER_free(prkey);
340 static int int_dsa_size(const EVP_PKEY *pkey)
342 return(DSA_size(pkey->pkey.dsa));
345 static int dsa_bits(const EVP_PKEY *pkey)
347 return BN_num_bits(pkey->pkey.dsa->p);
350 static int dsa_missing_parameters(const EVP_PKEY *pkey)
354 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
359 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
363 if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
365 if (to->pkey.dsa->p != NULL)
366 BN_free(to->pkey.dsa->p);
369 if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
371 if (to->pkey.dsa->q != NULL)
372 BN_free(to->pkey.dsa->q);
375 if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
377 if (to->pkey.dsa->g != NULL)
378 BN_free(to->pkey.dsa->g);
383 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
385 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
386 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
387 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
393 static void int_dsa_free(EVP_PKEY *pkey)
395 DSA_free(pkey->pkey.dsa);
398 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
403 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
407 int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
409 unsigned char *m=NULL;
412 const char *ktype = NULL;
414 const BIGNUM *priv_key, *pub_key;
417 priv_key = x->priv_key;
422 pub_key = x->pub_key;
427 ktype = "Private-Key";
429 ktype = "Public-Key";
431 ktype = "DSA-Parameters";
435 DSAerr(DSA_F_DSA_PRINT,DSA_R_MISSING_PARAMETERS);
439 update_buflen(x->p, &buf_len);
440 update_buflen(x->q, &buf_len);
441 update_buflen(x->g, &buf_len);
442 update_buflen(priv_key, &buf_len);
443 update_buflen(pub_key, &buf_len);
445 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
448 DSAerr(DSA_F_DSA_PRINT,ERR_R_MALLOC_FAILURE);
454 if(!BIO_indent(bp,off,128))
456 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
460 if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
462 if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
464 if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
465 if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
466 if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
469 if (m != NULL) OPENSSL_free(m);
473 static int dsa_param_decode(EVP_PKEY *pkey,
474 const unsigned char **pder, int derlen)
477 if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
479 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
482 EVP_PKEY_assign_DSA(pkey, dsa);
486 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
488 return i2d_DSAparams(pkey->pkey.dsa, pder);
491 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
494 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
497 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
500 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
504 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
507 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
510 static int old_dsa_priv_decode(EVP_PKEY *pkey,
511 const unsigned char **pder, int derlen)
514 if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
516 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
519 EVP_PKEY_assign_DSA(pkey, dsa);
523 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
525 return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
528 /* NB these are sorted in pkey_id order, lowest first */
530 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
563 "OpenSSL DSA method",
579 dsa_missing_parameters,