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/*
* Copyright (c) 2013 Sunil Nimmagadda <sunil@sunilnimmagadda.com>
* Copyright (c) 2013 Gilles Chehade <gilles@poolp.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
#ifdef HAVE_CRYPT_H
#include <crypt.h> /* needed for crypt() */
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifndef CRYPT_GENSALT_IMPLEMENTS_DEFAULT_PREFIX
#define PASSWORD_LEN 128
#endif
#define SALT_LEN 16
struct hashing_method {
char *prefix;
unsigned long count;
};
static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
static struct hashing_method ids[] = {
{"$y$", 8},
{"$gy$", 8},
{"$7$", 8},
{"$2a$", 10},
{"$2b$", 10},
{"$2y$", 10},
{"$6$", 5000},
{"$5$", 5000},
{"$3$", 1},
{"$2$", 10},
{"$1$", 1000}
};
static void to64(char *, long int, int);
static void print_passwd(const char *);
int
main(int argc, char *argv[])
{
char *line;
size_t linesz;
ssize_t linelen;
if (argc > 2) {
fprintf(stderr, "usage: encrypt <string>\n");
return (1);
}
if (argc == 2) {
print_passwd(argv[1]);
return (0);
}
line = NULL;
linesz = 0;
while ((linelen = getline(&line, &linesz, stdin)) != -1) {
if (line[linelen - 1] == '\n')
line[linelen - 1] = '\0';
print_passwd(line);
}
free(line);
return (0);
}
void
print_passwd(const char *string)
{
const char *id;
char salt[SALT_LEN+1];
#ifndef CRYPT_GENSALT_IMPLEMENTS_DEFAULT_PREFIX
char buffer[PASSWORD_LEN];
#else
char *buffer;
#endif
int n;
const char *p;
int nb_ids = sizeof(ids) / sizeof(ids[0]);
for (n = 0; n < SALT_LEN; ++n)
to64(&salt[n], arc4random_uniform(0xff), 1);
salt[SALT_LEN] = '\0';
for (n = 0; n < nb_ids; n++) {
id = ids[n].prefix;
#ifndef CRYPT_GENSALT_IMPLEMENTS_DEFAULT_PREFIX
(void)snprintf(buffer, sizeof buffer, "%s%s$", id, salt);
#else
buffer = crypt_gensalt(id, ids[n].count, NULL, 0);
#endif
if ((p = crypt(string, buffer)) == NULL)
continue;
if (strncmp(p, buffer, strlen(buffer)) != 0)
continue;
printf("%s\n", p);
return;
}
salt[2] = 0;
printf("%s\n", crypt(string, salt));
}
void
to64(char *s, long int v, int n)
{
while (--n >= 0) {
*s++ = itoa64[v & 0x3f];
v >>= 6;
}
}
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