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/* $Id: seppl.c 16 2003-12-04 21:09:48Z lennart $ */
/***
This file is part of seppl
seppl is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
seppl is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with seppl; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
***/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <getopt.h>
#include <string.h>
#include "seppl_common.h"
int genkey(int a, const char *keyname, int as_xml) {
struct Algs *alg;
int fd;
int count, sofar;
char *key;
if (!(alg = find_alg_by_number(a))) {
fprintf(stderr, "Algorithm '%i' not found.\n", a);
return -1;
}
if (!(key = (char*) malloc(alg->bits/8))) {
perror("Failed to allocate memory");
return -1;
}
if ((fd = open( "/dev/random", O_RDONLY)) < 0) {
perror("Failed to open /dev/random");
free(key);
return -1;
}
sofar = 0;
while (sofar < alg->bits/8 ) {
count = read( fd, &key[sofar], alg->bits/8 - sofar );
if (count <= 0) {
fprintf(stderr, "Failed to read key data.\n");
free(key);
close(fd);
return -1;
}
sofar += count;
}
close(fd);
if (as_xml) {
printf("<seppl-keyring>\n");
dump_key_xml(a, keyname, key);
printf("</seppl-keyring>\n");
} else
dump_key_bin(a, keyname, key);
free(key);
return 0;
}
static struct option long_options[] = {
{ "algorithm", 1, 0, 'a' },
{ "bits", 1, 0, 'b' },
{ "help", 0, 0, 'h' },
{ "name", 1, 0, 'n' },
{ "no-xml", 0, 0, 'x' },
};
/* default values */
char algorithm[32] = "aes";
char keyname[8] = "def";
int bits = 128;
int asxml = 1;
void usage(void) {
printf("seppl-gen-key:\n"
" -h --help Show this help\n"
" -x --no-xml No xml output\n"
" -a --algorithm ALGORITHM Specify algorithm (%s)\n"
" -b --bits BITS Specify key length (%d)\n"
" -n --name NAME Specify key name (%s)\n", algorithm, bits, keyname);
}
int main(int argc, char *argv[]) {
int c;
int option_index = 0;
int a;
while((c = getopt_long( argc, argv, "hxa:b:n:", long_options, &option_index )) != -1) {
switch( c ) {
case 'a':
/* algorithm */
strncpy( algorithm, optarg, 31 );
algorithm[31] = '\0';
break;
case 'b':
/* bits */
bits = atoi( optarg );
break;
case 'h':
/* help */
usage();
return 1;
case 'n':
/* name */
strncpy( keyname, optarg, 7 );
keyname[7] = '\0';
break;
case 'x':
/* no-xml */
asxml = 0;;
break;
}
}
if ((a = find_alg_by_name( algorithm, bits )) < 0) {
fprintf( stderr, "ERROR: Cipher not available\n" );
return 2;
}
return genkey(a, keyname, asxml) < 0 ? 3 : 0;
}
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