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authorRob Landley <rob@landley.net>2013-10-16 20:41:56 -0500
committerRob Landley <rob@landley.net>2013-10-16 20:41:56 -0500
commit18ec03543c3731e1ea25182ef72c49ac5ec2d1c7 (patch)
tree7b9b35338a9f42e713833aec0a568c4713b6fcc9 /toys/pending/mkpasswd.c
parent3403742655702257d5c4972ab6ec23eb95c3fede (diff)
downloadtoybox-18ec03543c3731e1ea25182ef72c49ac5ec2d1c7.tar.gz
useradd, groupadd, and mkpasswd submitted by Ashwini Sharma.
Diffstat (limited to 'toys/pending/mkpasswd.c')
-rw-r--r--toys/pending/mkpasswd.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/toys/pending/mkpasswd.c b/toys/pending/mkpasswd.c
new file mode 100644
index 00000000..87b239e0
--- /dev/null
+++ b/toys/pending/mkpasswd.c
@@ -0,0 +1,103 @@
+/* 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 n
+ help
+ usage: mkpasswd [OPTIONS] [PASSWORD] [SALT]
+
+ Crypt PASSWORD using crypt(3)
+
+ -P N Read password from fd N
+ -m TYPE Encryption method, when TYPE='help', then show the methods available
+ -S SALT
+*/
+
+#define FOR_mkpasswd
+#include "toys.h"
+#include "lib/xregcomp.h"
+
+GLOBALS(
+ long pfd;
+ char *method;
+ char *salt;
+)
+
+
+/*
+ * validate the salt provided by user.
+ * the allowed character set for salt is [./A-Za-z0-9]
+ */
+static void is_salt_valid(char *salt)
+{
+ regex_t rp;
+ regmatch_t rm[1];
+ char *regex = "[./A-Za-z0-9]*"; //salt REGEX
+
+ xregcomp(&rp, regex, REG_NEWLINE);
+
+ /* compare string against pattern -- remember that patterns
+ are anchored to the beginning of the line */
+ if (regexec(&rp, salt, 1, rm, 0) == 0 && rm[0].rm_so == 0
+ && rm[0].rm_eo == strlen(salt))
+ return;
+
+ error_exit("salt should be in character set [./A-Za-z0-9]");
+}
+
+void mkpasswd_main(void)
+{
+ int offset = 0;
+ char salt[MAX_SALT_LEN] = {0,};
+
+ if (!(toys.optflags & FLAG_m)) TT.method = "des";
+ else if (!strcmp(TT.method, "help")) {
+ xprintf("Available encryption methods are:\n"
+ " des\n md5\n sha256\n sha512\n");
+ return;
+ }
+ // If arguments are there, then the second argument is Salt, can be NULL also
+ if ((toys.optc == 2) && !(toys.optflags & FLAG_S)) TT.salt = toys.optargs[1];
+
+ offset= get_salt(salt, TT.method);
+ if (offset == -1) error_exit("unknown encryption method");
+ if (TT.salt) {
+ is_salt_valid(TT.salt);
+ snprintf(salt + offset, MAX_SALT_LEN - offset, "%s", TT.salt);
+ }
+
+ if (toys.optflags & FLAG_P) {
+ if (dup2(TT.pfd, STDIN_FILENO) == -1) perror_exit("fd");
+ close(TT.pfd);
+ }
+
+ if (!toys.optc) {
+ if (isatty(STDIN_FILENO)) {
+ if (read_password(toybuf, sizeof(toybuf), "Password: "))
+ perror_exit("password read failed");
+ } else {
+ // read from the given FD
+ int i = 0;
+ while (1) {
+ int ret = read(0, &toybuf[i], 1);
+ if ( ret < 0 ) perror_exit("password read failed");
+ else if (ret == 0 || toybuf[i] == '\n' || toybuf[i] == '\r' ||
+ sizeof(toybuf) == i+1) {
+ toybuf[i] = '\0';
+ break;
+ }
+ i++;
+ }
+ }
+ } else snprintf(toybuf, sizeof(toybuf), "%s", toys.optargs[0]);
+
+ // encrypt & print the password
+ xprintf("%s\n",crypt(toybuf, salt));
+}