Mercurial > hg > toybox
diff toys/other/mkpasswd.c @ 1367:def326708e49 draft
Promote mkpasswd from pending to other.
author | Rob Landley <rob@landley.net> |
---|---|
date | Sat, 28 Jun 2014 20:02:57 -0500 |
parents | toys/pending/mkpasswd.c@e65f9a9ba62d |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toys/other/mkpasswd.c Sat Jun 28 20:02:57 2014 -0500 @@ -0,0 +1,77 @@ +/* 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 + 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 pfd; + char *method; + char *salt; +) + +void mkpasswd_main(void) +{ + char salt[MAX_SALT_LEN] = {0,}; + int i; + + if (!TT.method) TT.method = "des"; + if (toys.optc == 2) { + if (TT.salt) error_exit("duplicate salt"); + TT.salt = toys.optargs[1]; + } + + if (-1 == (i = get_salt(salt, TT.method))) error_exit("bad -m"); + if (TT.salt) { + char *s = TT.salt; + + // 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.salt); + } + + // Because read_password() doesn't have an fd argument + if (TT.pfd) { + if (dup2(TT.pfd, 0) == -1) perror_exit("fd"); + close(TT.pfd); + } + + // 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)); +}