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>
64 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
66 const unsigned char *p, *pm;
72 ASN1_INTEGER *public_key = NULL;
76 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
78 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
80 if (ptype != V_ASN1_SEQUENCE)
82 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
90 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
92 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
96 if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
98 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
102 /* We have parameters now set public key */
103 if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
105 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
109 ASN1_INTEGER_free(public_key);
115 ASN1_INTEGER_free(public_key);
122 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
127 unsigned char *penc = NULL;
131 if (pkey->save_parameters)
134 str = ASN1_STRING_new();
135 str->length = i2d_DSAparams(dsa, &str->data);
136 if (str->length <= 0)
138 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
141 ptype = V_ASN1_SEQUENCE;
145 ptype = V_ASN1_UNDEF;
150 penclen = i2d_DSAPublicKey(dsa, &penc);
154 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
158 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
159 ptype, pval, penc, penclen))
166 ASN1_STRING_free(pval);
171 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
173 if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
179 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
180 * AlgorithmIdentifier the pubkey must be recalculated.
183 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
185 const unsigned char *p, *pm;
191 ASN1_INTEGER *privkey = NULL;
194 STACK_OF(ASN1_TYPE) *ndsa = NULL;
197 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
199 X509_ALGOR_get0(NULL, &ptype, &pval, palg);
201 /* Check for broken DSA PKCS#8, UGH! */
202 if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
205 if(!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pklen,
209 if (sk_ASN1_TYPE_num(ndsa) != 2)
211 /* Handle Two broken types:
212 * SEQUENCE {parameters, priv_key}
213 * SEQUENCE {pub_key, priv_key}
216 t1 = sk_ASN1_TYPE_value(ndsa, 0);
217 t2 = sk_ASN1_TYPE_value(ndsa, 1);
218 if (t1->type == V_ASN1_SEQUENCE)
220 p8->broken = PKCS8_EMBEDDED_PARAM;
221 pval = t1->value.ptr;
223 else if (ptype == V_ASN1_SEQUENCE)
224 p8->broken = PKCS8_NS_DB;
228 if (t2->type != V_ASN1_INTEGER)
231 privkey = t2->value.integer;
235 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
237 if (ptype != V_ASN1_SEQUENCE)
243 pmlen = pstr->length;
244 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
246 /* We have parameters now set private key */
247 if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
249 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
252 /* Calculate public key */
253 if (!(dsa->pub_key = BN_new()))
255 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
258 if (!(ctx = BN_CTX_new()))
260 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
264 if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
266 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
270 EVP_PKEY_assign_DSA(pkey, dsa);
273 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
275 ASN1_INTEGER_free(privkey);
280 DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
283 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
289 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
291 ASN1_STRING *params = NULL;
292 ASN1_INTEGER *prkey = NULL;
293 unsigned char *dp = NULL;
296 params = ASN1_STRING_new();
300 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
304 params->length = i2d_DSAparams(pkey->pkey.dsa, ¶ms->data);
305 if (params->length <= 0)
307 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
310 params->type = V_ASN1_SEQUENCE;
312 /* Get private key into integer */
313 prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
317 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
321 dplen = i2d_ASN1_INTEGER(prkey, &dp);
323 ASN1_INTEGER_free(prkey);
325 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
326 V_ASN1_SEQUENCE, params, dp, dplen))
335 ASN1_STRING_free(params);
337 ASN1_INTEGER_free(prkey);
341 static int int_dsa_size(const EVP_PKEY *pkey)
343 return(DSA_size(pkey->pkey.dsa));
346 static int dsa_bits(const EVP_PKEY *pkey)
348 return BN_num_bits(pkey->pkey.dsa->p);
351 static int dsa_missing_parameters(const EVP_PKEY *pkey)
355 if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
360 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
364 if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
366 if (to->pkey.dsa->p != NULL)
367 BN_free(to->pkey.dsa->p);
370 if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
372 if (to->pkey.dsa->q != NULL)
373 BN_free(to->pkey.dsa->q);
376 if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
378 if (to->pkey.dsa->g != NULL)
379 BN_free(to->pkey.dsa->g);
384 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
386 if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
387 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
388 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
394 static void int_dsa_free(EVP_PKEY *pkey)
396 DSA_free(pkey->pkey.dsa);
399 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
404 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
408 int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
410 unsigned char *m=NULL;
413 const char *ktype = NULL;
415 const BIGNUM *priv_key, *pub_key;
418 priv_key = x->priv_key;
423 pub_key = x->pub_key;
428 ktype = "Private-Key";
430 ktype = "Public-Key";
432 ktype = "DSA-Parameters";
436 DSAerr(DSA_F_DSA_PRINT,DSA_R_MISSING_PARAMETERS);
440 update_buflen(x->p, &buf_len);
441 update_buflen(x->q, &buf_len);
442 update_buflen(x->g, &buf_len);
443 update_buflen(priv_key, &buf_len);
444 update_buflen(pub_key, &buf_len);
446 m=(unsigned char *)OPENSSL_malloc(buf_len+10);
449 DSAerr(DSA_F_DSA_PRINT,ERR_R_MALLOC_FAILURE);
455 if(!BIO_indent(bp,off,128))
457 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
461 if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
463 if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
465 if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
466 if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
467 if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
470 if (m != NULL) OPENSSL_free(m);
475 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
478 return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
481 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
484 return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
488 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
491 return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
494 /* NB these are sorted in pkey_id order, lowest first */
496 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
541 dsa_missing_parameters,