1 files changed, 77 insertions, 0 deletions
diff --git a/toys/other/mkpasswd.c b/toys/other/mkpasswd.c
new file mode 100644
index 00000000..2e1c1a98
--- /dev/null
+++ b/toys/other/mkpasswd.c
@@ -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));
+}