1 /* crypto/dh/dhtest.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 /* Until the key-gen callbacks are modified to use newer prototypes, we allow 60 * deprecated functions for openssl-internal code */ 61 #ifdef OPENSSL_NO_DEPRECATED 62 #undef OPENSSL_NO_DEPRECATED 63 #endif 64 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 69 #include <openssl/crypto.h> 70 #include <openssl/bio.h> 71 #include <openssl/bn.h> 72 #include <openssl/rand.h> 73 #include <openssl/err.h> 74 75 #include <openssl/dh.h> 76 77 static int cb(int p, int n, BN_GENCB *arg); 78 79 int main(int argc, char *argv[]) 80 { 81 BN_GENCB _cb; 82 DH *a; 83 DH *b=NULL; 84 char buf[12]; 85 unsigned char *abuf=NULL,*bbuf=NULL; 86 int i,alen,blen,aout,bout,ret=1; 87 BIO *out; 88 89 out=BIO_new(BIO_s_file()); 90 if (out == NULL) exit(1); 91 BIO_set_fp(out,stdout,BIO_NOCLOSE); 92 93 BN_GENCB_set(&_cb, &cb, out); 94 if(((a = DH_new()) == NULL) || !DH_generate_parameters_ex(a, 64, 95 DH_GENERATOR_5, &_cb)) 96 goto err; 97 98 if (!DH_check(a, &i)) goto err; 99 if (i & DH_CHECK_P_NOT_PRIME) 100 BIO_puts(out, "p value is not prime\n"); 101 if (i & DH_CHECK_P_NOT_SAFE_PRIME) 102 BIO_puts(out, "p value is not a safe prime\n"); 103 if (i & DH_UNABLE_TO_CHECK_GENERATOR) 104 BIO_puts(out, "unable to check the generator value\n"); 105 if (i & DH_NOT_SUITABLE_GENERATOR) 106 BIO_puts(out, "the g value is not a generator\n"); 107 108 BIO_puts(out,"\np ="); 109 BN_print(out,a->p); 110 BIO_puts(out,"\ng ="); 111 BN_print(out,a->g); 112 BIO_puts(out,"\n"); 113 114 b=DH_new(); 115 if (b == NULL) goto err; 116 117 b->p=BN_dup(a->p); 118 b->g=BN_dup(a->g); 119 if ((b->p == NULL) || (b->g == NULL)) goto err; 120 121 /* Set a to run with normal modexp and b to use constant time */ 122 a->flags &= ~DH_FLAG_NO_EXP_CONSTTIME; 123 b->flags |= DH_FLAG_NO_EXP_CONSTTIME; 124 125 if (!DH_generate_key(a)) goto err; 126 BIO_puts(out,"pri 1="); 127 BN_print(out,a->priv_key); 128 BIO_puts(out,"\npub 1="); 129 BN_print(out,a->pub_key); 130 BIO_puts(out,"\n"); 131 132 if (!DH_generate_key(b)) goto err; 133 BIO_puts(out,"pri 2="); 134 BN_print(out,b->priv_key); 135 BIO_puts(out,"\npub 2="); 136 BN_print(out,b->pub_key); 137 BIO_puts(out,"\n"); 138 139 alen=DH_size(a); 140 abuf=malloc(alen); 141 aout=DH_compute_key(abuf,b->pub_key,a); 142 143 BIO_puts(out,"key1 ="); 144 for (i=0; i<aout; i++) 145 { 146 snprintf(buf,sizeof buf,"%02X",abuf[i]); 147 BIO_puts(out,buf); 148 } 149 BIO_puts(out,"\n"); 150 151 blen=DH_size(b); 152 bbuf=malloc(blen); 153 bout=DH_compute_key(bbuf,a->pub_key,b); 154 155 BIO_puts(out,"key2 ="); 156 for (i=0; i<bout; i++) 157 { 158 snprintf(buf,sizeof buf,"%02X",bbuf[i]); 159 BIO_puts(out,buf); 160 } 161 BIO_puts(out,"\n"); 162 if ((aout < 4) || (bout != aout) || (memcmp(abuf,bbuf,aout) != 0)) 163 { 164 fprintf(stderr,"Error in DH routines\n"); 165 ret=1; 166 } 167 else 168 ret=0; 169 err: 170 ERR_print_errors_fp(stderr); 171 172 free(abuf); 173 free(bbuf); 174 if(b != NULL) DH_free(b); 175 if(a != NULL) DH_free(a); 176 BIO_free(out); 177 exit(ret); 178 } 179 180 static int cb(int p, int n, BN_GENCB *arg) 181 { 182 char c='*'; 183 184 if (p == 0) c='.'; 185 if (p == 1) c='+'; 186 if (p == 2) c='*'; 187 if (p == 3) c='\n'; 188 BIO_write(arg->arg,&c,1); 189 (void)BIO_flush(arg->arg); 190 return 1; 191 } 192