1*0Sstevel@tonic-gate /* crypto/dh/dh_lib.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate * All rights reserved.
4*0Sstevel@tonic-gate *
5*0Sstevel@tonic-gate * This package is an SSL implementation written
6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions
11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate *
16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate * the code are not to be removed.
18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate * as the author of the parts of the library used.
20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate *
23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate * are met:
26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate * must display the following acknowledgement:
33*0Sstevel@tonic-gate * "This product includes cryptographic software written by
34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate * being used are not cryptographic related :-).
37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate *
41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate * SUCH DAMAGE.
52*0Sstevel@tonic-gate *
53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be
55*0Sstevel@tonic-gate * copied and put under another distribution licence
56*0Sstevel@tonic-gate * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate */
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate #include <stdio.h>
60*0Sstevel@tonic-gate #include "cryptlib.h"
61*0Sstevel@tonic-gate #include <openssl/bn.h>
62*0Sstevel@tonic-gate #include <openssl/dh.h>
63*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
64*0Sstevel@tonic-gate #include <openssl/engine.h>
65*0Sstevel@tonic-gate #endif
66*0Sstevel@tonic-gate
67*0Sstevel@tonic-gate const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
68*0Sstevel@tonic-gate
69*0Sstevel@tonic-gate static const DH_METHOD *default_DH_method = NULL;
70*0Sstevel@tonic-gate
DH_set_default_method(const DH_METHOD * meth)71*0Sstevel@tonic-gate void DH_set_default_method(const DH_METHOD *meth)
72*0Sstevel@tonic-gate {
73*0Sstevel@tonic-gate default_DH_method = meth;
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate
DH_get_default_method(void)76*0Sstevel@tonic-gate const DH_METHOD *DH_get_default_method(void)
77*0Sstevel@tonic-gate {
78*0Sstevel@tonic-gate if(!default_DH_method)
79*0Sstevel@tonic-gate default_DH_method = DH_OpenSSL();
80*0Sstevel@tonic-gate return default_DH_method;
81*0Sstevel@tonic-gate }
82*0Sstevel@tonic-gate
DH_set_method(DH * dh,const DH_METHOD * meth)83*0Sstevel@tonic-gate int DH_set_method(DH *dh, const DH_METHOD *meth)
84*0Sstevel@tonic-gate {
85*0Sstevel@tonic-gate /* NB: The caller is specifically setting a method, so it's not up to us
86*0Sstevel@tonic-gate * to deal with which ENGINE it comes from. */
87*0Sstevel@tonic-gate const DH_METHOD *mtmp;
88*0Sstevel@tonic-gate mtmp = dh->meth;
89*0Sstevel@tonic-gate if (mtmp->finish) mtmp->finish(dh);
90*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
91*0Sstevel@tonic-gate if (dh->engine)
92*0Sstevel@tonic-gate {
93*0Sstevel@tonic-gate ENGINE_finish(dh->engine);
94*0Sstevel@tonic-gate dh->engine = NULL;
95*0Sstevel@tonic-gate }
96*0Sstevel@tonic-gate #endif
97*0Sstevel@tonic-gate dh->meth = meth;
98*0Sstevel@tonic-gate if (meth->init) meth->init(dh);
99*0Sstevel@tonic-gate return 1;
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate
DH_new(void)102*0Sstevel@tonic-gate DH *DH_new(void)
103*0Sstevel@tonic-gate {
104*0Sstevel@tonic-gate return DH_new_method(NULL);
105*0Sstevel@tonic-gate }
106*0Sstevel@tonic-gate
DH_new_method(ENGINE * engine)107*0Sstevel@tonic-gate DH *DH_new_method(ENGINE *engine)
108*0Sstevel@tonic-gate {
109*0Sstevel@tonic-gate DH *ret;
110*0Sstevel@tonic-gate
111*0Sstevel@tonic-gate ret=(DH *)OPENSSL_malloc(sizeof(DH));
112*0Sstevel@tonic-gate if (ret == NULL)
113*0Sstevel@tonic-gate {
114*0Sstevel@tonic-gate DHerr(DH_F_DH_NEW_METHOD,ERR_R_MALLOC_FAILURE);
115*0Sstevel@tonic-gate return(NULL);
116*0Sstevel@tonic-gate }
117*0Sstevel@tonic-gate
118*0Sstevel@tonic-gate ret->meth = DH_get_default_method();
119*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
120*0Sstevel@tonic-gate if (engine)
121*0Sstevel@tonic-gate {
122*0Sstevel@tonic-gate if (!ENGINE_init(engine))
123*0Sstevel@tonic-gate {
124*0Sstevel@tonic-gate DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
125*0Sstevel@tonic-gate OPENSSL_free(ret);
126*0Sstevel@tonic-gate return NULL;
127*0Sstevel@tonic-gate }
128*0Sstevel@tonic-gate ret->engine = engine;
129*0Sstevel@tonic-gate }
130*0Sstevel@tonic-gate else
131*0Sstevel@tonic-gate ret->engine = ENGINE_get_default_DH();
132*0Sstevel@tonic-gate if(ret->engine)
133*0Sstevel@tonic-gate {
134*0Sstevel@tonic-gate ret->meth = ENGINE_get_DH(ret->engine);
135*0Sstevel@tonic-gate if(!ret->meth)
136*0Sstevel@tonic-gate {
137*0Sstevel@tonic-gate DHerr(DH_F_DH_NEW_METHOD,ERR_R_ENGINE_LIB);
138*0Sstevel@tonic-gate ENGINE_finish(ret->engine);
139*0Sstevel@tonic-gate OPENSSL_free(ret);
140*0Sstevel@tonic-gate return NULL;
141*0Sstevel@tonic-gate }
142*0Sstevel@tonic-gate }
143*0Sstevel@tonic-gate #endif
144*0Sstevel@tonic-gate
145*0Sstevel@tonic-gate ret->pad=0;
146*0Sstevel@tonic-gate ret->version=0;
147*0Sstevel@tonic-gate ret->p=NULL;
148*0Sstevel@tonic-gate ret->g=NULL;
149*0Sstevel@tonic-gate ret->length=0;
150*0Sstevel@tonic-gate ret->pub_key=NULL;
151*0Sstevel@tonic-gate ret->priv_key=NULL;
152*0Sstevel@tonic-gate ret->q=NULL;
153*0Sstevel@tonic-gate ret->j=NULL;
154*0Sstevel@tonic-gate ret->seed = NULL;
155*0Sstevel@tonic-gate ret->seedlen = 0;
156*0Sstevel@tonic-gate ret->counter = NULL;
157*0Sstevel@tonic-gate ret->method_mont_p=NULL;
158*0Sstevel@tonic-gate ret->references = 1;
159*0Sstevel@tonic-gate ret->flags=ret->meth->flags;
160*0Sstevel@tonic-gate CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
161*0Sstevel@tonic-gate if ((ret->meth->init != NULL) && !ret->meth->init(ret))
162*0Sstevel@tonic-gate {
163*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
164*0Sstevel@tonic-gate if (ret->engine)
165*0Sstevel@tonic-gate ENGINE_finish(ret->engine);
166*0Sstevel@tonic-gate #endif
167*0Sstevel@tonic-gate CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
168*0Sstevel@tonic-gate OPENSSL_free(ret);
169*0Sstevel@tonic-gate ret=NULL;
170*0Sstevel@tonic-gate }
171*0Sstevel@tonic-gate return(ret);
172*0Sstevel@tonic-gate }
173*0Sstevel@tonic-gate
DH_free(DH * r)174*0Sstevel@tonic-gate void DH_free(DH *r)
175*0Sstevel@tonic-gate {
176*0Sstevel@tonic-gate int i;
177*0Sstevel@tonic-gate if(r == NULL) return;
178*0Sstevel@tonic-gate i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);
179*0Sstevel@tonic-gate #ifdef REF_PRINT
180*0Sstevel@tonic-gate REF_PRINT("DH",r);
181*0Sstevel@tonic-gate #endif
182*0Sstevel@tonic-gate if (i > 0) return;
183*0Sstevel@tonic-gate #ifdef REF_CHECK
184*0Sstevel@tonic-gate if (i < 0)
185*0Sstevel@tonic-gate {
186*0Sstevel@tonic-gate fprintf(stderr,"DH_free, bad reference count\n");
187*0Sstevel@tonic-gate abort();
188*0Sstevel@tonic-gate }
189*0Sstevel@tonic-gate #endif
190*0Sstevel@tonic-gate
191*0Sstevel@tonic-gate if (r->meth->finish)
192*0Sstevel@tonic-gate r->meth->finish(r);
193*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
194*0Sstevel@tonic-gate if (r->engine)
195*0Sstevel@tonic-gate ENGINE_finish(r->engine);
196*0Sstevel@tonic-gate #endif
197*0Sstevel@tonic-gate
198*0Sstevel@tonic-gate CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
199*0Sstevel@tonic-gate
200*0Sstevel@tonic-gate if (r->p != NULL) BN_clear_free(r->p);
201*0Sstevel@tonic-gate if (r->g != NULL) BN_clear_free(r->g);
202*0Sstevel@tonic-gate if (r->q != NULL) BN_clear_free(r->q);
203*0Sstevel@tonic-gate if (r->j != NULL) BN_clear_free(r->j);
204*0Sstevel@tonic-gate if (r->seed) OPENSSL_free(r->seed);
205*0Sstevel@tonic-gate if (r->counter != NULL) BN_clear_free(r->counter);
206*0Sstevel@tonic-gate if (r->pub_key != NULL) BN_clear_free(r->pub_key);
207*0Sstevel@tonic-gate if (r->priv_key != NULL) BN_clear_free(r->priv_key);
208*0Sstevel@tonic-gate OPENSSL_free(r);
209*0Sstevel@tonic-gate }
210*0Sstevel@tonic-gate
DH_up_ref(DH * r)211*0Sstevel@tonic-gate int DH_up_ref(DH *r)
212*0Sstevel@tonic-gate {
213*0Sstevel@tonic-gate int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH);
214*0Sstevel@tonic-gate #ifdef REF_PRINT
215*0Sstevel@tonic-gate REF_PRINT("DH",r);
216*0Sstevel@tonic-gate #endif
217*0Sstevel@tonic-gate #ifdef REF_CHECK
218*0Sstevel@tonic-gate if (i < 2)
219*0Sstevel@tonic-gate {
220*0Sstevel@tonic-gate fprintf(stderr, "DH_up, bad reference count\n");
221*0Sstevel@tonic-gate abort();
222*0Sstevel@tonic-gate }
223*0Sstevel@tonic-gate #endif
224*0Sstevel@tonic-gate return ((i > 1) ? 1 : 0);
225*0Sstevel@tonic-gate }
226*0Sstevel@tonic-gate
DH_get_ex_new_index(long argl,void * argp,CRYPTO_EX_new * new_func,CRYPTO_EX_dup * dup_func,CRYPTO_EX_free * free_func)227*0Sstevel@tonic-gate int DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
228*0Sstevel@tonic-gate CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
229*0Sstevel@tonic-gate {
230*0Sstevel@tonic-gate return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp,
231*0Sstevel@tonic-gate new_func, dup_func, free_func);
232*0Sstevel@tonic-gate }
233*0Sstevel@tonic-gate
DH_set_ex_data(DH * d,int idx,void * arg)234*0Sstevel@tonic-gate int DH_set_ex_data(DH *d, int idx, void *arg)
235*0Sstevel@tonic-gate {
236*0Sstevel@tonic-gate return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
237*0Sstevel@tonic-gate }
238*0Sstevel@tonic-gate
DH_get_ex_data(DH * d,int idx)239*0Sstevel@tonic-gate void *DH_get_ex_data(DH *d, int idx)
240*0Sstevel@tonic-gate {
241*0Sstevel@tonic-gate return(CRYPTO_get_ex_data(&d->ex_data,idx));
242*0Sstevel@tonic-gate }
243*0Sstevel@tonic-gate
DH_size(const DH * dh)244*0Sstevel@tonic-gate int DH_size(const DH *dh)
245*0Sstevel@tonic-gate {
246*0Sstevel@tonic-gate return(BN_num_bytes(dh->p));
247*0Sstevel@tonic-gate }
248