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