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Diffstat (limited to 'package/ead/src/tinysrp/tconf.c')
| -rw-r--r-- | package/ead/src/tinysrp/tconf.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/package/ead/src/tinysrp/tconf.c b/package/ead/src/tinysrp/tconf.c new file mode 100644 index 000000000..ad77f4cc1 --- /dev/null +++ b/package/ead/src/tinysrp/tconf.c @@ -0,0 +1,157 @@ +/* + * Copyright (c) 1997-2000 The Stanford SRP Authentication Project + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INCIDENTAL, + * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF + * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * In addition, the following conditions apply: + * + * 1. Any software that incorporates the SRP authentication technology + * must display the following acknowlegment: + * "This product uses the 'Secure Remote Password' cryptographic + * authentication system developed by Tom Wu (tjw@CS.Stanford.EDU)." + * + * 2. Any software that incorporates all or part of the SRP distribution + * itself must also display the following acknowledgment: + * "This product includes software developed by Tom Wu and Eugene + * Jhong for the SRP Distribution (http://srp.stanford.edu/srp/)." + * + * 3. Redistributions in source or binary form must retain an intact copy + * of this copyright notice and list of conditions. + */ + +#include <unistd.h> /* close getlogin */ +#include <stdlib.h> /* atexit exit */ +#include <stdio.h> +#include <string.h> + +#include "t_pwd.h" + +#define MIN_BASIS_BITS 512 +#define BASIS_BITS 2048 + +extern int optind; +extern char *optarg; + +extern int errno; + +char *progName; + +int debug = 0; +int verbose = 0; +int composite = 0; + +int main(argc, argv) + int argc; + char *argv[]; +{ + char *chp; + char *configFile = NULL; + char cbuf[256]; + char b64buf[MAXB64PARAMLEN]; + int c, ch, i, lastidx, keylen, yesno, fsize, status, nparams; + FILE *efp; + + struct t_preconf * tpc; + struct t_conf tcs; + struct t_conf * tc = &tcs; + struct t_confent * tcent; + + progName = *argv; + if ((chp = strrchr(progName, '/')) != (char *) 0) progName = chp + 1; + + while ((ch = getopt(argc, argv, "dv2c:")) != EOF) + switch(ch) { + case 'c': + configFile = optarg; + break; + case 'v': + verbose++; + break; + case 'd': + debug++; + break; + case '2': + composite++; + break; + default: + fprintf(stderr, "usage: %s [-dv2] [-c configfile]\n", progName); + exit(1); + } + + argc -= optind; + argv += optind; + + lastidx = 0; + keylen = 0; + + tcent = t_newconfent(tc); + + printf("\nThis program will generate a set of parameters for the EPS\n"); + printf("password file. The size of these parameters, measured in bits,\n"); + printf("determines the level of security offered by SRP, and is related\n"); + printf("to the security of similarly-sized RSA or Diffie-Hellman keys.\n"); + printf("Choosing a predefined field is generally preferable to generating\n"); + printf("a new field because clients can avoid costly parameter verification.\n"); + printf("Either way, the values generated by this program are public and\n"); + printf("can even shared between systems.\n"); + + printf("\nEnter the new field size, in bits. Suggested sizes:\n\n"); + printf(" 512 (fast, minimally secure)\n"); + printf(" 768 (moderate security)\n"); + printf("1024 (most popular default)\n"); + printf("1536 (additional security, possibly slow)\n"); + printf("2048 (maximum supported security level)\n"); + printf("\nField size (%d to %d): ", MIN_BASIS_BITS, BASIS_BITS); + + fgets(cbuf, sizeof(cbuf), stdin); + fsize = atoi(cbuf); + if(fsize < MIN_BASIS_BITS || fsize > BASIS_BITS) { + fprintf(stderr, "%s: field size must be between %d and %d\n", + progName, MIN_BASIS_BITS, BASIS_BITS); + exit(1); + } + + if(fsize <= keylen) + fprintf(stderr, "Warning: new field size is not larger than old field size\n"); + + printf("\nInitializing random number generator..."); + fflush(stdout); + t_initrand(); + + if(composite) + printf("done.\n\nGenerating a %d-bit composite with safe prime factors. This may take a while.\n", fsize); + else + printf("done.\n\nGenerating a %d-bit safe prime. This may take a while.\n", fsize); + + while((tcent = (composite ? t_makeconfent_c(tc, fsize) : + t_makeconfent(tc, fsize))) == NULL) + printf("Parameter generation failed, retrying...\n"); + tcent->index = lastidx + 1; + + printf("\nParameters successfully generated.\n"); + printf("N = [%s]\n", t_tob64(b64buf, + tcent->modulus.data, tcent->modulus.len)); + printf("g = [%s]\n", t_tob64(b64buf, + tcent->generator.data, tcent->generator.len)); + printf("\nYou must update the pre_params array in t_getconf.c\n"); +} |