539b51f95162f7e22b26107ea82ada548a07f2d4
[openssl.git] / crypto / dsa / dsa_ameth.c
1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
2  * project 2006.
3  */
4 /* ====================================================================
5  * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer. 
13  *
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
17  *    distribution.
18  *
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/)"
23  *
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.
28  *
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.
32  *
33  * 6. Redistributions of any form whatsoever must retain the following
34  *    acknowledgment:
35  *    "This product includes software developed by the OpenSSL Project
36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
37  *
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  * ====================================================================
51  *
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).
55  *
56  */
57
58 #include <stdio.h>
59 #include "cryptlib.h"
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>
66 #endif
67 #include "asn1_locl.h"
68
69 static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
70         {
71         const unsigned char *p, *pm;
72         int pklen, pmlen;
73         int ptype;
74         void *pval;
75         ASN1_STRING *pstr;
76         X509_ALGOR *palg;
77         ASN1_INTEGER *public_key = NULL;
78
79         DSA *dsa = NULL;
80
81         if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
82                 return 0;
83         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
84
85
86         if (ptype == V_ASN1_SEQUENCE)
87                 {
88                 pstr = pval;    
89                 pm = pstr->data;
90                 pmlen = pstr->length;
91
92                 if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
93                         {
94                         DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
95                         goto err;
96                         }
97
98                 }
99         else if ((ptype == V_ASN1_NULL) || (ptype == V_ASN1_UNDEF))
100                 {
101                 if (!(dsa = DSA_new()))
102                         {
103                         DSAerr(DSA_F_DSA_PUB_DECODE, ERR_R_MALLOC_FAILURE);
104                         goto err;
105                         }
106                 }
107         else
108                 {
109                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
110                 goto err;
111                 }
112
113         if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
114                 {
115                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
116                 goto err;
117                 }
118
119         if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
120                 {
121                 DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
122                 goto err;
123                 }
124
125         ASN1_INTEGER_free(public_key);
126         EVP_PKEY_assign_DSA(pkey, dsa);
127         return 1;
128
129         err:
130         if (public_key)
131                 ASN1_INTEGER_free(public_key);
132         if (dsa)
133                 DSA_free(dsa);
134         return 0;
135
136         }
137
138 static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
139         {
140         DSA *dsa;
141         void *pval = NULL;
142         int ptype;
143         unsigned char *penc = NULL;
144         int penclen;
145
146         dsa=pkey->pkey.dsa;
147         if (pkey->save_parameters && dsa->p && dsa->q && dsa->g)
148                 {
149                 ASN1_STRING *str;
150                 str = ASN1_STRING_new();
151                 str->length = i2d_DSAparams(dsa, &str->data);
152                 if (str->length <= 0)
153                         {
154                         DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
155                         goto err;
156                         }
157                 pval = str;
158                 ptype = V_ASN1_SEQUENCE;
159                 }
160         else
161                 ptype = V_ASN1_UNDEF;
162
163         dsa->write_params=0;
164
165         penclen = i2d_DSAPublicKey(dsa, &penc);
166
167         if (penclen <= 0)
168                 {
169                 DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
170                 goto err;
171                 }
172
173         if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
174                                 ptype, pval, penc, penclen))
175                 return 1;
176
177         err:
178         if (penc)
179                 OPENSSL_free(penc);
180         if (pval)
181                 ASN1_STRING_free(pval);
182
183         return 0;
184         }
185
186 /* In PKCS#8 DSA: you just get a private key integer and parameters in the
187  * AlgorithmIdentifier the pubkey must be recalculated.
188  */
189         
190 static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
191         {
192         const unsigned char *p, *pm;
193         int pklen, pmlen;
194         int ptype;
195         void *pval;
196         ASN1_STRING *pstr;
197         X509_ALGOR *palg;
198         ASN1_INTEGER *privkey = NULL;
199         BN_CTX *ctx = NULL;
200
201         STACK_OF(ASN1_TYPE) *ndsa = NULL;
202         DSA *dsa = NULL;
203
204         if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
205                 return 0;
206         X509_ALGOR_get0(NULL, &ptype, &pval, palg);
207
208         /* Check for broken DSA PKCS#8, UGH! */
209         if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
210                 {
211                 ASN1_TYPE *t1, *t2;
212                 if(!(ndsa = d2i_ASN1_SEQUENCE_ANY(NULL, &p, pklen)));
213                         goto decerr;
214                 if (sk_ASN1_TYPE_num(ndsa) != 2)
215                         goto decerr;
216                 /* Handle Two broken types:
217                  * SEQUENCE {parameters, priv_key}
218                  * SEQUENCE {pub_key, priv_key}
219                  */
220
221                 t1 = sk_ASN1_TYPE_value(ndsa, 0);
222                 t2 = sk_ASN1_TYPE_value(ndsa, 1);
223                 if (t1->type == V_ASN1_SEQUENCE)
224                         {
225                         p8->broken = PKCS8_EMBEDDED_PARAM;
226                         pval = t1->value.ptr;
227                         }
228                 else if (ptype == V_ASN1_SEQUENCE)
229                         p8->broken = PKCS8_NS_DB;
230                 else
231                         goto decerr;
232
233                 if (t2->type != V_ASN1_INTEGER)
234                         goto decerr;
235
236                 privkey = t2->value.integer;
237                 }
238         else
239                 {
240                 const unsigned char *q = p;
241                 if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
242                         goto decerr;
243                 if (privkey->type == V_ASN1_NEG_INTEGER)
244                         {
245                         p8->broken = PKCS8_NEG_PRIVKEY;
246                         ASN1_INTEGER_free(privkey);
247                         if (!(privkey=d2i_ASN1_UINTEGER(NULL, &q, pklen)))
248                                 goto decerr;
249                         }
250                 if (ptype != V_ASN1_SEQUENCE)
251                         goto decerr;
252                 }
253
254         pstr = pval;    
255         pm = pstr->data;
256         pmlen = pstr->length;
257         if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
258                 goto decerr;
259         /* We have parameters now set private key */
260         if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
261                 {
262                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
263                 goto dsaerr;
264                 }
265         /* Calculate public key */
266         if (!(dsa->pub_key = BN_new()))
267                 {
268                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
269                 goto dsaerr;
270                 }
271         if (!(ctx = BN_CTX_new()))
272                 {
273                 DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
274                 goto dsaerr;
275                 }
276                         
277         if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
278                 {
279                 DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
280                 goto dsaerr;
281                 }
282
283         EVP_PKEY_assign_DSA(pkey, dsa);
284         BN_CTX_free (ctx);
285         if(ndsa)
286                 sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
287         else
288                 ASN1_INTEGER_free(privkey);
289
290         return 1;
291
292         decerr:
293         DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
294         dsaerr:
295         BN_CTX_free (ctx);
296         if (privkey)
297                 ASN1_INTEGER_free(privkey);
298         sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
299         DSA_free(dsa);
300         return 0;
301         }
302
303 static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
304 {
305         ASN1_STRING *params = NULL;
306         ASN1_INTEGER *prkey = NULL;
307         unsigned char *dp = NULL;
308         int dplen;
309
310         params = ASN1_STRING_new();
311
312         if (!params)
313                 {
314                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
315                 goto err;
316                 }
317
318         params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
319         if (params->length <= 0)
320                 {
321                 DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
322                 goto err;
323                 }
324         params->type = V_ASN1_SEQUENCE;
325
326         /* Get private key into integer */
327         prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
328
329         if (!prkey)
330                 {
331                 DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
332                 goto err;
333                 }
334
335         dplen = i2d_ASN1_INTEGER(prkey, &dp);
336
337         ASN1_INTEGER_free(prkey);
338
339         if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
340                                 V_ASN1_SEQUENCE, params, dp, dplen))
341                 goto err;
342
343         return 1;
344
345 err:
346         if (dp != NULL)
347                 OPENSSL_free(dp);
348         if (params != NULL)
349                 ASN1_STRING_free(params);
350         if (prkey != NULL)
351                 ASN1_INTEGER_free(prkey);
352         return 0;
353 }
354
355 static int int_dsa_size(const EVP_PKEY *pkey)
356         {
357         return(DSA_size(pkey->pkey.dsa));
358         }
359
360 static int dsa_bits(const EVP_PKEY *pkey)
361         {
362         return BN_num_bits(pkey->pkey.dsa->p);
363         }
364
365 static int dsa_missing_parameters(const EVP_PKEY *pkey)
366         {
367         DSA *dsa;
368         dsa=pkey->pkey.dsa;
369         if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
370                         return 1;
371         return 0;
372         }
373
374 static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
375         {
376         BIGNUM *a;
377
378         if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
379                 return 0;
380         if (to->pkey.dsa->p != NULL)
381                 BN_free(to->pkey.dsa->p);
382         to->pkey.dsa->p=a;
383
384         if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
385                 return 0;
386         if (to->pkey.dsa->q != NULL)
387                 BN_free(to->pkey.dsa->q);
388         to->pkey.dsa->q=a;
389
390         if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
391                 return 0;
392         if (to->pkey.dsa->g != NULL)
393                 BN_free(to->pkey.dsa->g);
394         to->pkey.dsa->g=a;
395         return 1;
396         }
397
398 static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
399         {
400         if (    BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
401                 BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
402                 BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
403                 return 0;
404         else
405                 return 1;
406         }
407
408 static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
409         {
410         if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
411                 return 0;
412         else
413                 return 1;
414         }
415
416 static void int_dsa_free(EVP_PKEY *pkey)
417         {
418         DSA_free(pkey->pkey.dsa);
419         }
420
421 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
422         {
423         size_t i;
424         if (!b)
425                 return;
426         if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
427                         *pbuflen = i;
428         }
429
430 static int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
431         {
432         unsigned char *m=NULL;
433         int ret=0;
434         size_t buf_len=0;
435         const char *ktype = NULL;
436
437         const BIGNUM *priv_key, *pub_key;
438
439         if (ptype == 2)
440                 priv_key = x->priv_key;
441         else
442                 priv_key = NULL;
443
444         if (ptype > 0)
445                 pub_key = x->pub_key;
446         else
447                 pub_key = NULL;
448
449         if (ptype == 2)
450                 ktype = "Private-Key";
451         else if (ptype == 1)
452                 ktype = "Public-Key";
453         else
454                 ktype = "DSA-Parameters";
455
456         update_buflen(x->p, &buf_len);
457         update_buflen(x->q, &buf_len);
458         update_buflen(x->g, &buf_len);
459         update_buflen(priv_key, &buf_len);
460         update_buflen(pub_key, &buf_len);
461
462         m=(unsigned char *)OPENSSL_malloc(buf_len+10);
463         if (m == NULL)
464                 {
465                 DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
466                 goto err;
467                 }
468
469         if (priv_key)
470                 {
471                 if(!BIO_indent(bp,off,128))
472                    goto err;
473                 if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
474                         <= 0) goto err;
475                 }
476
477         if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
478                 goto err;
479         if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
480                 goto err;
481         if (!ASN1_bn_print(bp,"P:   ",x->p,m,off)) goto err;
482         if (!ASN1_bn_print(bp,"Q:   ",x->q,m,off)) goto err;
483         if (!ASN1_bn_print(bp,"G:   ",x->g,m,off)) goto err;
484         ret=1;
485 err:
486         if (m != NULL) OPENSSL_free(m);
487         return(ret);
488         }
489
490 static int dsa_param_decode(EVP_PKEY *pkey,
491                                         const unsigned char **pder, int derlen)
492         {
493         DSA *dsa;
494         if (!(dsa = d2i_DSAparams(NULL, pder, derlen)))
495                 {
496                 DSAerr(DSA_F_DSA_PARAM_DECODE, ERR_R_DSA_LIB);
497                 return 0;
498                 }
499         EVP_PKEY_assign_DSA(pkey, dsa);
500         return 1;
501         }
502
503 static int dsa_param_encode(const EVP_PKEY *pkey, unsigned char **pder)
504         {
505         return i2d_DSAparams(pkey->pkey.dsa, pder);
506         }
507
508 static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
509                                                         ASN1_PCTX *ctx)
510         {
511         return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
512         }
513
514 static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
515                                                         ASN1_PCTX *ctx)
516         {
517         return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
518         }
519
520
521 static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
522                                                         ASN1_PCTX *ctx)
523         {
524         return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
525         }
526
527 static int old_dsa_priv_decode(EVP_PKEY *pkey,
528                                         const unsigned char **pder, int derlen)
529         {
530         DSA *dsa;
531         if (!(dsa = d2i_DSAPrivateKey (NULL, pder, derlen)))
532                 {
533                 DSAerr(DSA_F_OLD_DSA_PRIV_DECODE, ERR_R_DSA_LIB);
534                 return 0;
535                 }
536         EVP_PKEY_assign_DSA(pkey, dsa);
537         return 1;
538         }
539
540 static int old_dsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
541         {
542         return i2d_DSAPrivateKey(pkey->pkey.dsa, pder);
543         }
544
545 static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
546                                         const ASN1_STRING *sig,
547                                         int indent, ASN1_PCTX *pctx)
548         {
549         DSA_SIG *dsa_sig;
550         const unsigned char *p = sig->data;
551         dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
552         if (dsa_sig)
553                 {
554                 int rv = 0;
555                 size_t buf_len = 0;
556                 unsigned char *m=NULL;
557                 update_buflen(dsa_sig->r, &buf_len);
558                 update_buflen(dsa_sig->s, &buf_len);
559                 m = OPENSSL_malloc(buf_len+10);
560                 if (m == NULL)
561                         {
562                         DSAerr(DSA_F_DO_DSA_PRINT,ERR_R_MALLOC_FAILURE);
563                         goto err;
564                         }
565
566                 if (BIO_write(bp, "\n", 1) != 1)
567                         goto err;
568
569                 if (!ASN1_bn_print(bp,"r:   ",dsa_sig->r,m,indent))
570                         goto err;
571                 if (!ASN1_bn_print(bp,"s:   ",dsa_sig->s,m,indent))
572                         goto err;
573                 rv = 1;
574                 err:
575                 if (m)
576                         OPENSSL_free(m);
577                 DSA_SIG_free(dsa_sig);
578                 return rv;
579                 }
580         return X509_signature_dump(bp, sig, indent);
581         }
582
583 static int dsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
584         {
585         switch (op)
586                 {
587                 case ASN1_PKEY_CTRL_PKCS7_SIGN:
588                 if (arg1 == 0)
589                         {
590                         int snid, hnid;
591                         X509_ALGOR *alg1, *alg2;
592                         PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, &alg1, &alg2);
593                         if (alg1 == NULL || alg1->algorithm == NULL)
594                                 return -1;
595                         hnid = OBJ_obj2nid(alg1->algorithm);
596                         if (hnid == NID_undef)
597                                 return -1;
598                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
599                                 return -1; 
600                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
601                         }
602                 return 1;
603 #ifndef OPENSSL_NO_CMS
604                 case ASN1_PKEY_CTRL_CMS_SIGN:
605                 if (arg1 == 0)
606                         {
607                         int snid, hnid;
608                         X509_ALGOR *alg1, *alg2;
609                         CMS_SignerInfo_get0_algs(arg2, NULL, NULL, &alg1, &alg2);
610                         if (alg1 == NULL || alg1->algorithm == NULL)
611                                 return -1;
612                         hnid = OBJ_obj2nid(alg1->algorithm);
613                         if (hnid == NID_undef)
614                                 return -1;
615                         if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_id(pkey)))
616                                 return -1; 
617                         X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
618                         }
619                 return 1;
620 #endif
621
622                 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
623                 *(int *)arg2 = NID_sha1;
624                 return 2;
625
626                 default:
627                 return -2;
628
629                 }
630
631         }
632
633 /* NB these are sorted in pkey_id order, lowest first */
634
635 const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = 
636         {
637
638                 {
639                 EVP_PKEY_DSA2,
640                 EVP_PKEY_DSA,
641                 ASN1_PKEY_ALIAS
642                 },
643
644                 {
645                 EVP_PKEY_DSA1,
646                 EVP_PKEY_DSA,
647                 ASN1_PKEY_ALIAS
648                 },
649
650                 {
651                 EVP_PKEY_DSA4,
652                 EVP_PKEY_DSA,
653                 ASN1_PKEY_ALIAS
654                 },
655
656                 {
657                 EVP_PKEY_DSA3,
658                 EVP_PKEY_DSA,
659                 ASN1_PKEY_ALIAS
660                 },
661
662                 {
663                 EVP_PKEY_DSA,
664                 EVP_PKEY_DSA,
665                 0,
666
667                 "DSA",
668                 "OpenSSL DSA method",
669
670                 dsa_pub_decode,
671                 dsa_pub_encode,
672                 dsa_pub_cmp,
673                 dsa_pub_print,
674
675                 dsa_priv_decode,
676                 dsa_priv_encode,
677                 dsa_priv_print,
678
679                 int_dsa_size,
680                 dsa_bits,
681
682                 dsa_param_decode,
683                 dsa_param_encode,
684                 dsa_missing_parameters,
685                 dsa_copy_parameters,
686                 dsa_cmp_parameters,
687                 dsa_param_print,
688                 dsa_sig_print,
689
690                 int_dsa_free,
691                 dsa_pkey_ctrl,
692                 old_dsa_priv_decode,
693                 old_dsa_priv_encode
694                 }
695         };
696