[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/libbb/obscure.c b/ap/app/busybox/src/libbb/obscure.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * Mini weak password checker implementation for busybox
+ *
+ * Copyright (C) 2006 Tito Ragusa <farmatito@tiscali.it>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+/* A good password:
+ 1) should contain at least six characters (man passwd);
+ 2) empty passwords are not permitted;
+ 3) should contain a mix of four different types of characters
+ upper case letters,
+ lower case letters,
+ numbers,
+ special characters such as !@#$%^&*,;".
+ This password types should not be permitted:
+ a) pure numbers: birthdates, social security number, license plate, phone numbers;
+ b) words and all letters only passwords (uppercase, lowercase or mixed)
+ as palindromes, consecutive or repetitive letters
+ or adjacent letters on your keyboard;
+ c) username, real name, company name or (e-mail?) address
+ in any form (as-is, reversed, capitalized, doubled, etc.).
+ (we can check only against username, gecos and hostname)
+ d) common and obvious letter-number replacements
+ (e.g. replace the letter O with number 0)
+ such as "M1cr0$0ft" or "P@ssw0rd" (CAVEAT: we cannot check for them
+ without the use of a dictionary).
+
+ For each missing type of characters an increase of password length is
+ requested.
+
+ If user is root we warn only.
+
+ CAVEAT: some older versions of crypt() truncates passwords to 8 chars,
+ so that aaaaaaaa1Q$ is equal to aaaaaaaa making it possible to fool
+ some of our checks. We don't test for this special case as newer versions
+ of crypt do not truncate passwords.
+*/
+
+#include "libbb.h"
+
+static int string_checker_helper(const char *p1, const char *p2) __attribute__ ((__pure__));
+
+static int string_checker_helper(const char *p1, const char *p2)
+{
+ /* as sub-string */
+ if (strcasestr(p2, p1) != NULL
+ /* invert in case haystack is shorter than needle */
+ || strcasestr(p1, p2) != NULL
+ /* as-is or capitalized */
+ /* || strcasecmp(p1, p2) == 0 - 1st strcasestr should catch this too */
+ ) {
+ return 1;
+ }
+ return 0;
+}
+
+static int string_checker(const char *p1, const char *p2)
+{
+ int size, i;
+ /* check string */
+ int ret = string_checker_helper(p1, p2);
+ /* make our own copy */
+ char *p = xstrdup(p1);
+
+ /* reverse string */
+ i = size = strlen(p1);
+ while (--i >= 0) {
+ *p++ = p1[i];
+ }
+ p -= size; /* restore pointer */
+
+ /* check reversed string */
+ ret |= string_checker_helper(p, p2);
+
+ /* clean up */
+ memset(p, 0, size);
+ free(p);
+
+ return ret;
+}
+
+#define CATEGORIES 4
+
+#define LOWERCASE 1
+#define UPPERCASE 2
+#define NUMBERS 4
+#define SPECIAL 8
+
+#define LAST_CAT 8
+
+static const char *obscure_msg(const char *old_p, const char *new_p, const struct passwd *pw)
+{
+ unsigned length;
+ unsigned size;
+ unsigned mixed;
+ unsigned c;
+ unsigned i;
+ const char *p;
+ char *hostname;
+
+ /* size */
+ if (!new_p || (length = strlen(new_p)) < CONFIG_PASSWORD_MINLEN)
+ return "too short";
+
+ /* no username as-is, as sub-string, reversed, capitalized, doubled */
+ if (string_checker(new_p, pw->pw_name)) {
+ return "similar to username";
+ }
+#ifndef __BIONIC__
+ /* no gecos as-is, as sub-string, reversed, capitalized, doubled */
+ if (pw->pw_gecos[0] && string_checker(new_p, pw->pw_gecos)) {
+ return "similar to gecos";
+ }
+#endif
+ /* hostname as-is, as sub-string, reversed, capitalized, doubled */
+ hostname = safe_gethostname();
+ i = string_checker(new_p, hostname);
+ free(hostname);
+ if (i)
+ return "similar to hostname";
+
+ /* Should / Must contain a mix of: */
+ mixed = 0;
+ for (i = 0; i < length; i++) {
+ if (islower(new_p[i])) { /* a-z */
+ mixed |= LOWERCASE;
+ } else if (isupper(new_p[i])) { /* A-Z */
+ mixed |= UPPERCASE;
+ } else if (isdigit(new_p[i])) { /* 0-9 */
+ mixed |= NUMBERS;
+ } else { /* special characters */
+ mixed |= SPECIAL;
+ }
+ /* Count i'th char */
+ c = 0;
+ p = new_p;
+ while (1) {
+ p = strchr(p, new_p[i]);
+ if (p == NULL) {
+ break;
+ }
+ c++;
+ p++;
+ if (!*p) {
+ break;
+ }
+ }
+ /* More than 50% similar characters ? */
+ if (c*2 >= length) {
+ return "too many similar characters";
+ }
+ }
+
+ size = CONFIG_PASSWORD_MINLEN + 2*CATEGORIES;
+ for (i = 1; i <= LAST_CAT; i <<= 1)
+ if (mixed & i)
+ size -= 2;
+ if (length < size)
+ return "too weak";
+
+ if (old_p && old_p[0]) {
+ /* check vs. old password */
+ if (string_checker(new_p, old_p)) {
+ return "similar to old password";
+ }
+ }
+
+ return NULL;
+}
+
+int FAST_FUNC obscure(const char *old, const char *newval, const struct passwd *pw)
+{
+ const char *msg;
+
+ msg = obscure_msg(old, newval, pw);
+ if (msg) {
+ printf("Bad password: %s\n", msg);
+ return 1;
+ }
+ return 0;
+}