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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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