1 files changed, 71 insertions, 0 deletions
diff --git a/source3/lib/username.c b/source3/lib/username.c
index b8d152c83f..a78a344eb8 100644
--- a/source3/lib/username.c
+++ b/source3/lib/username.c
@@ -22,6 +22,9 @@
 #include "includes.h"
 extern int DEBUGLEVEL;
 
+/* internal functions - modified versions of the ones in password.c */
+static struct passwd *uname_string_combinations(char *s, struct passwd * (*fn) (), int N);
+static struct passwd *uname_string_combinations2(char *s, int offset, struct passwd * (*fn) (), int N);
 
 /****************************************************************************
 get a users home directory. tries as-is then lower case
@@ -141,6 +144,8 @@ Note that this changes user!
 struct passwd *Get_Pwnam(char *user,BOOL allow_change)
 {
   fstring user2;
+  int last_char;
+  int usernamelevel = lp_usernamelevel();
 
   struct passwd *ret;  
 
@@ -172,6 +177,19 @@ struct passwd *Get_Pwnam(char *user,BOOL allow_change)
   ret = _Get_Pwnam(user);
   if (ret) return(ret);
 
+  /* try with last letter capitalised */
+  strlower(user);
+  last_char = strlen(user)-1;
+  user[last_char] = toupper(user[last_char]);
+  DEBUG(3, ("Trying username %s\n", user));
+  ret = _Get_Pwnam(user);
+  if (ret) return(ret);
+
+  /* try all combinations up to usernamelevel */
+  strlower(user);
+  ret = uname_string_combinations(user, _Get_Pwnam, usernamelevel);
+  if (ret) return(ret);
+
   if (allow_change)
     strcpy(user,user2);
 
@@ -250,4 +268,57 @@ BOOL user_in_list(char *user,char *list)
   return(False);
 }
 
+/* The functions below have been taken from password.c and slightly modified */
+/****************************************************************************
+apply a function to upper/lower case combinations
+of a string and return true if one of them returns true.
+try all combinations with N uppercase letters.
+offset is the first char to try and change (start with 0)
+it assumes the string starts lowercased
+****************************************************************************/
+static struct passwd *uname_string_combinations2(char *s,int offset,struct passwd *(*fn)(),int N)
+{
+  int len = strlen(s);
+  int i;
+  struct passwd *ret;
+
+#ifdef PASSWORD_LENGTH
+  len = MIN(len,PASSWORD_LENGTH);
+#endif
+
+  if (N <= 0 || offset >= len)
+    return(fn(s));
+
 
+  for (i=offset;i<(len-(N-1));i++)
+
+    {
+      char c = s[i];
+      if (!islower(c)) continue;
+      s[i] = toupper(c);
+      ret = uname_string_combinations2(s,i+1,fn,N-1);
+      if(ret) return(ret);
+      s[i] = c;
+    }
+  return(NULL);
+}
+
+/****************************************************************************
+apply a function to upper/lower case combinations
+of a string and return true if one of them returns true.
+try all combinations with up to N uppercase letters.
+offset is the first char to try and change (start with 0)
+it assumes the string starts lowercased
+****************************************************************************/
+static struct passwd * uname_string_combinations(char *s,struct passwd * (*fn)(),int N)
+{
+  int n;
+  struct passwd *ret;
+
+  for (n=1;n<=N;n++)
+  {
+    ret = uname_string_combinations2(s,0,fn,n);
+    if(ret) return(ret);
+  }
+  return(NULL);
+}