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/* simple password generator by Nelson Minar (minar@reed.edu)
** copyright 1991, all rights reserved.
** You can use this code as long as my name stays with it.
**
** md5 patch by W. Campbell <wcampbel@botbay.net>
** Modernization, getopt, etc for the Hybrid IRCD team
** by W. Campbell
**
** $Id: mkpasswd.c 1350 2005-11-29 11:40:00Z kreator $
*/
#include "stdinc.h"
#define FLAG_MD5 0x00000001
#define FLAG_DES 0x00000002
#define FLAG_SALT 0x00000004
#define FLAG_PASS 0x00000008
#define FLAG_LENGTH 0x00000010
extern char *getpass(const char *);
extern char *crypt(const char *, const char *);
#ifdef HAVE_SOLARIS
extern char *crypt_md5(const char *, const char *);
#endif
char *make_des_salt(void);
char *make_md5_salt(int);
char *make_md5_salt_para(char *);
void usage();
static char saltChars[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
int main(int argc, char *argv[])
{
char *plaintext = NULL;
extern char *optarg;
int c;
char *saltpara = NULL;
char *salt;
int flag = 0;
int length = 8;
srandom(time(NULL));
while( (c=getopt(argc, argv, "mdh?l:s:p:")) != -1)
{
switch(c)
{
case 'm':
flag |= FLAG_MD5;
break;
case 'd':
flag |= FLAG_DES;
break;
case 'l':
flag |= FLAG_LENGTH;
length = atoi(optarg);
break;
case 's':
flag |= FLAG_SALT;
saltpara = optarg;
break;
case 'p':
flag |= FLAG_PASS;
plaintext = optarg;
break;
case 'h':
case '?':
usage();
break;
default:
printf("Invalid Option: -%c\n", c);
break;
}
}
if (flag & FLAG_MD5)
{
if (flag & FLAG_SALT)
salt = make_md5_salt_para(saltpara);
else
salt = make_md5_salt(length);
}
else
{
if (flag & FLAG_SALT)
{
if ((strlen(saltpara) == 2))
{
salt = saltpara;
}
else
{
printf("Invalid salt, please enter 2 alphanumeric characters\n");
exit(1);
}
}
else
{
salt = make_des_salt();
}
}
if (flag & FLAG_PASS)
{
if (!plaintext)
printf("Please enter a valid password\n");
}
else
{
plaintext = getpass("plaintext: ");
}
#ifdef HAVE_SOLARIS
if (flag & FLAG_MD5)
printf("%s\n", crypt_md5(plaintext, salt));
else
#endif
printf("%s\n", crypt(plaintext, salt));
return 0;
}
char *make_des_salt(void)
{
static char salt[3];
salt[0] = saltChars[random() % 64];
salt[1] = saltChars[random() % 64];
salt[2] = '\0';
return salt;
}
char *make_md5_salt_para(char *saltpara)
{
static char salt[21];
if (saltpara && (strlen(saltpara) <= 16))
{
/* sprintf used because of portability requirements, the length
** is checked above, so it should not be too much of a concern
*/
sprintf(salt, "$1$%s$", saltpara);
return salt;
}
printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
exit(1);
/* NOT REACHED */
return NULL;
}
char *make_md5_salt(int length)
{
static char salt[21];
int i;
if (length > 16)
{
printf("MD5 salt length too long\n");
exit(0);
}
salt[0] = '$';
salt[1] = '1';
salt[2] = '$';
for (i=3; i<(length+3); i++)
salt[i] = saltChars[random() % 64];
salt[length+3] = '$';
salt[length+4] = '\0';
return salt;
}
void usage()
{
printf("mkpasswd [-m|-d] [-l saltlength] [-s salt] [-p plaintext]\n");
printf("-m Generate an MD5 password\n");
printf("-d Generate a DES password\n");
printf("-l Specify a length for a random MD5 salt\n");
printf("-s Specify a salt, 2 alphanumeric characters for DES, up to 16 for MD5\n");
printf("-p Specify a plaintext password to use\n");
printf("Example: mkpasswd -m -s 3dr -p test\n");
exit(0);
}
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