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/* mkpasswd.c - encrypt the given passwd using salt
*
* Copyright 2013 Ashwini Kumar <ak.ashwini@gmail.com>
* Copyright 2013 Kyungwan Han <asura321@gmail.com>
*
* No Standard
USE_MKPASSWD(NEWTOY(mkpasswd, ">2S:m:P#=0<0", TOYFLAG_USR|TOYFLAG_BIN))
config MKPASSWD
bool "mkpasswd"
default y
depends on !TOYBOX_ON_ANDROID
help
usage: mkpasswd [-P FD] [-m TYPE] [-S SALT] [PASSWORD] [SALT]
Crypt PASSWORD using crypt(3)
-P FD Read password from file descriptor FD
-m TYPE Encryption method (des, md5, sha256, or sha512; default is des)
-S SALT
*/
#define FOR_mkpasswd
#include "toys.h"
GLOBALS(
long P;
char *m, *S;
)
void mkpasswd_main(void)
{
char salt[MAX_SALT_LEN] = {0,};
int i;
if (!TT.m) TT.m = "des";
if (toys.optc == 2) {
if (TT.S) error_exit("duplicate salt");
TT.S = toys.optargs[1];
}
if (-1 == (i = get_salt(salt, TT.m))) error_exit("bad -m");
if (TT.S) {
char *s = TT.S;
// In C locale, isalnum() means [A-Za-Z0-0]
while (isalnum(*s) || *s == '.' || *s == '/') s++;
if (*s) error_exit("salt not in [./A-Za-z0-9]");
snprintf(salt+i, sizeof(salt)-i, "%s", TT.S);
}
// Because read_password() doesn't have an fd argument
if (TT.P) {
if (dup2(TT.P, 0) == -1) perror_exit("fd");
close(TT.P);
}
// If we haven't got a password on the command line, read it from tty or FD
if (!*toys.optargs) {
// Prompt and read interactively?
if (isatty(0)) {
if (read_password(toybuf, sizeof(toybuf), "Password: "))
perror_exit("password read failed");
} else {
for (i = 0; i<sizeof(toybuf)-1; i++) {
if (!xread(0, toybuf+i, 1)) break;
if (toybuf[i] == '\n' || toybuf[i] == '\r') break;
}
toybuf[i] = 0;
}
}
// encrypt & print the password
xprintf("%s\n",crypt(*toys.optargs ? *toys.optargs : toybuf, salt));
}
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