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Diffstat (limited to 'openssl/demos/prime/prime.c')
| -rw-r--r-- | openssl/demos/prime/prime.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/openssl/demos/prime/prime.c b/openssl/demos/prime/prime.c new file mode 100644 index 000000000..103e0efc0 --- /dev/null +++ b/openssl/demos/prime/prime.c @@ -0,0 +1,101 @@ +/* demos/prime/prime.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include <stdlib.h> +#include <openssl/bn.h> + +void callback(type,num) +int type,num; + { + if (type == 0) + fprintf(stderr,"."); + else if (type == 1) + fprintf(stderr,"+"); + else if (type == 2) + fprintf(stderr,"*"); + fflush(stderr); + } + +int main(argc,argv) +int argc; +char *argv[]; + { + BIGNUM *rand; + int num=256; + + /* we should really call RAND_seed(char *bytes,int num); + * to fully initalise the random number generator */ + if (argc >= 2) + { + num=atoi(argv[1]); + if (num == 0) num=256; + } + + fprintf(stderr,"generate a strong prime\n"); + rand=BN_generate_prime(NULL,num,1,NULL,NULL,callback,NULL); + /* change the third parameter to 1 for a strong prime */ + fprintf(stderr,"\n"); + + BN_print_fp(stdout,rand); + fprintf(stdout,"\n"); + BN_free(rand); + exit(0); + return(0); + } + |