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Diffstat (limited to 'apps/gendh.c')
| -rw-r--r-- | apps/gendh.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/apps/gendh.c b/apps/gendh.c new file mode 100644 index 0000000000..b7b6d0fd62 --- /dev/null +++ b/apps/gendh.c @@ -0,0 +1,234 @@ +/* apps/gendh.c */ +/* Copyright (C) 1995-1997 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 <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include "apps.h" +#include "bio.h" +#include "rand.h" +#include "err.h" +#include "bn.h" +#include "dh.h" +#include "x509.h" +#include "pem.h" + +#define DEFBITS 512 +#undef PROG +#define PROG gendh_main + +#ifndef NOPROTO +static void MS_CALLBACK dh_cb(int p, int n); +static long dh_load_rand(char *names); +#else +static void MS_CALLBACK dh_cb(); +static long dh_load_rand(); +#endif + +int MAIN(argc, argv) +int argc; +char **argv; + { + char buffer[200]; + DH *dh=NULL; + int ret=1,num=DEFBITS; + int g=2; + char *outfile=NULL; + char *inrand=NULL,*randfile; + BIO *out=NULL; + + apps_startup(); + + if (bio_err == NULL) + if ((bio_err=BIO_new(BIO_s_file())) != NULL) + BIO_set_fp(bio_err,stderr,BIO_NOCLOSE); + + argv++; + argc--; + for (;;) + { + if (argc <= 0) break; + if (strcmp(*argv,"-out") == 0) + { + if (--argc < 1) goto bad; + outfile= *(++argv); + } + else if (strcmp(*argv,"-2") == 0) + g=2; + /* else if (strcmp(*argv,"-3") == 0) + g=3; */ + else if (strcmp(*argv,"-5") == 0) + g=5; + else if (strcmp(*argv,"-rand") == 0) + { + if (--argc < 1) goto bad; + inrand= *(++argv); + } + else + break; + argv++; + argc--; + } + if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0))) + { +bad: + BIO_printf(bio_err,"usage: gendh [args] [numbits]\n"); + BIO_printf(bio_err," -out file - output the key to 'file\n"); + BIO_printf(bio_err," -2 use 2 as the generator value\n"); + /* BIO_printf(bio_err," -3 use 3 as the generator value\n"); */ + BIO_printf(bio_err," -5 use 5 as the generator value\n"); + BIO_printf(bio_err," -rand file:file:...\n"); + BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); + BIO_printf(bio_err," the random number generator\n"); + goto end; + } + + out=BIO_new(BIO_s_file()); + if (out == NULL) + { + ERR_print_errors(bio_err); + goto end; + } + + if (outfile == NULL) + BIO_set_fp(out,stdout,BIO_NOCLOSE); + else + { + if (BIO_write_filename(out,outfile) <= 0) + { + perror(outfile); + goto end; + } + } + + randfile=RAND_file_name(buffer,200); + if ((randfile == NULL)|| !RAND_load_file(randfile,1024L*1024L)) + BIO_printf(bio_err,"unable to load 'random state'\n"); + + if (inrand == NULL) + BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); + else + { + BIO_printf(bio_err,"%ld semi-random bytes loaded\n", + dh_load_rand(inrand)); + } + + BIO_printf(bio_err,"Generating DH parameters, %d bit long strong prime, generator of %d\n",num,g); + BIO_printf(bio_err,"This is going to take a long time\n"); + dh=DH_generate_parameters(num,g,dh_cb); + + if (dh == NULL) goto end; + + if (randfile == NULL) + BIO_printf(bio_err,"unable to write 'random state'\n"); + else + RAND_write_file(randfile); + + if (!PEM_write_bio_DHparams(out,dh)) + goto end; + ret=0; +end: + if (ret != 0) + ERR_print_errors(bio_err); + if (out != NULL) BIO_free(out); + if (dh != NULL) DH_free(dh); + EXIT(ret); + } + +static void MS_CALLBACK dh_cb(p, n) +int p; +int n; + { + char c='*'; + + if (p == 0) c='.'; + if (p == 1) c='+'; + if (p == 2) c='*'; + if (p == 3) c='\n'; + BIO_write(bio_err,&c,1); + BIO_flush(bio_err); +#ifdef LINT + p=n; +#endif + } + +static long dh_load_rand(name) +char *name; + { + char *p,*n; + int last; + long tot=0; + + for (;;) + { + last=0; + for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++); + if (*p == '\0') last=1; + *p='\0'; + n=name; + name=p+1; + if (*n == '\0') break; + + tot+=RAND_load_file(n,1); + if (last) break; + } + return(tot); + } + + |