From 0e8fd3398771da2f016d72830179507f3edda51b Mon Sep 17 00:00:00 2001
From: Samba Release Account <samba-bugs@samba.org>
Date: Sat, 4 May 1996 07:50:46 +0000
Subject: Initial version imported to CVS (This used to be commit
 291551d80711daab7b7581720bcd9a08d6096517)

---
 source3/smbd/mangle.c | 610 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 610 insertions(+)
 create mode 100644 source3/smbd/mangle.c

(limited to 'source3/smbd/mangle.c')

diff --git a/source3/smbd/mangle.c b/source3/smbd/mangle.c
new file mode 100644
index 0000000000..8f1490c528
--- /dev/null
+++ b/source3/smbd/mangle.c
@@ -0,0 +1,610 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Name mangling
+   Copyright (C) Andrew Tridgell 1992-1995
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "loadparm.h"
+
+extern int DEBUGLEVEL;
+extern int case_default;
+extern BOOL case_mangle;
+
+/****************************************************************************
+provide a checksum on a string
+****************************************************************************/
+int str_checksum(char *s)
+{
+  int res = 0;
+  int c;
+  int i=0;
+  while (*s)
+    {
+      c = *s;
+      res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
+      s++; i++;
+    }
+  return(res);
+}
+
+/****************************************************************************
+return True if a name is a special msdos reserved name
+****************************************************************************/
+static BOOL is_reserved_msdos(char *fname)
+{
+  char upperFname[13];
+  char *p;
+
+  StrnCpy (upperFname, fname, 12);
+
+  /* lpt1.txt and con.txt etc are also illegal */
+  p=strchr(upperFname,'.');
+  if (p)
+   *p='\0';
+  strupper (upperFname);
+  if ((strcmp(upperFname,"CLOCK$") == 0) ||
+    (strcmp(upperFname,"CON") == 0) ||
+    (strcmp(upperFname,"AUX") == 0) ||
+    (strcmp(upperFname,"COM1") == 0) ||
+    (strcmp(upperFname,"COM2") == 0) ||
+    (strcmp(upperFname,"COM3") == 0) ||
+    (strcmp(upperFname,"COM4") == 0) ||
+    (strcmp(upperFname,"LPT1") == 0) ||
+    (strcmp(upperFname,"LPT2") == 0) ||
+    (strcmp(upperFname,"LPT3") == 0) ||
+    (strcmp(upperFname,"NUL") == 0) ||
+    (strcmp(upperFname,"PRN") == 0))
+      return (True) ;
+
+  return (False);
+}
+
+
+
+/****************************************************************************
+return True if a name is in 8.3 dos format
+****************************************************************************/
+BOOL is_8_3(char *fname)
+{
+  int len;
+  char *dot_pos;
+  char *slash_pos = strrchr(fname,'/');
+  int l;
+
+  if (slash_pos) fname = slash_pos+1;
+  len = strlen(fname);
+
+  dot_pos = strchr(fname,'.');
+
+  DEBUG(5,("checking %s for 8.3\n",fname));
+
+  if (case_mangle)
+    switch (case_default)
+      {
+      case CASE_LOWER:
+	if (strhasupper(fname)) return(False);
+	break;
+      case CASE_UPPER:
+	if (strhaslower(fname)) return(False);
+	break;
+      }
+
+  /* can't be longer than 12 chars */
+  if (len == 0 || len > 12)
+    return(False);
+
+  /* can't be an MS-DOS Special file such as lpt1 or even lpt1.txt */
+  if (is_reserved_msdos(fname))
+    return(False);
+
+  /* can't contain invalid dos chars */
+  /* Windows use the ANSI charset.
+     But filenames are translated in the PC charset.
+     This Translation may be more or less relaxed depending
+     the Windows application. */
+
+  /* %%% A nice improvment to name mangling would be to translate
+     filename to ANSI charset on the smb server host */
+
+  {
+    char *p = fname;
+#ifdef KANJI
+    dot_pos = 0;
+    while (*p)
+      {
+	  if (is_shift_jis (*p)) {
+	      p += 2;
+	  } else if (is_kana (*p)) {
+	      p ++;
+	  } else {
+	      if (*p == '.' && !dot_pos)
+		  dot_pos = (char *) p;
+	      if (!isdoschar(*p))
+		  return(False);
+	      p++;
+	  }
+      }      
+#else
+    while (*p)
+      {
+	if (!isdoschar(*p))
+	  return(False);
+	p++;
+      }      
+#endif /* KANJI */
+  }
+
+  /* no dot and less than 9 means OK */
+  if (!dot_pos)
+    return(len <= 8);
+	
+  l = PTR_DIFF(dot_pos,fname);
+
+  /* base must be at least 1 char except special cases . and .. */
+  if (l == 0)
+    return(strcmp(fname,".") == 0 || strcmp(fname,"..") == 0);
+
+  /* base can't be greater than 8 */
+  if (l > 8)
+    return(False);
+
+  if (lp_strip_dot() && 
+      len - l == 1 &&
+      !strchr(dot_pos+1,'.'))
+    {
+      *dot_pos = 0;
+      return(True);
+    }
+
+  /* extension must be between 1 and 3 */
+  if ( (len - l < 2 ) || (len - l > 4) )
+    return(False);
+
+  /* extension can't have a dot */
+  if (strchr(dot_pos+1,'.'))
+    return(False);
+
+  /* must be in 8.3 format */
+  return(True);
+}
+
+
+
+/*
+keep a stack of name mangling results - just
+so file moves and copies have a chance of working
+*/
+fstring *mangled_stack = NULL;
+int mangled_stack_size = 0;
+int mangled_stack_len = 0;
+
+/****************************************************************************
+create the mangled stack
+****************************************************************************/
+void create_mangled_stack(int size)
+{
+  if (mangled_stack)
+    {
+      free(mangled_stack);
+      mangled_stack_size = 0;
+      mangled_stack_len = 0;
+    }
+  if (size > 0)
+    mangled_stack = (fstring *)malloc(sizeof(fstring)*size);
+  if (mangled_stack) mangled_stack_size = size;
+}
+
+/****************************************************************************
+push a mangled name onto the stack
+****************************************************************************/
+static void push_mangled_name(char *s)
+{
+  int i;
+  char *p;
+
+  if (!mangled_stack)
+    return;
+
+  for (i=0;i<mangled_stack_len;i++)
+    if (strcmp(s,mangled_stack[i]) == 0)
+      {
+	array_promote(mangled_stack[0],sizeof(fstring),i);	
+	return;
+      }
+
+  memmove(mangled_stack[1],mangled_stack[0],
+	  sizeof(fstring)*MIN(mangled_stack_len,mangled_stack_size-1));
+  strcpy(mangled_stack[0],s);
+  p = strrchr(mangled_stack[0],'.');
+  if (p && (!strhasupper(p+1)) && (strlen(p+1) < 4))
+    *p = 0;
+  mangled_stack_len = MIN(mangled_stack_size,mangled_stack_len+1);
+}
+
+/****************************************************************************
+check for a name on the mangled name stack
+****************************************************************************/
+BOOL check_mangled_stack(char *s)
+{
+  int i;
+  pstring tmpname;
+  char extension[5];
+  char *p = strrchr(s,'.');
+  BOOL check_extension = False;
+
+  extension[0] = 0;
+
+  if (!mangled_stack) return(False);
+
+  if (p)
+    {
+      check_extension = True;
+      StrnCpy(extension,p,4);
+      strlower(extension); /* XXXXXXX */
+    }
+
+  for (i=0;i<mangled_stack_len;i++)
+    {
+      strcpy(tmpname,mangled_stack[i]);
+      mangle_name_83(tmpname);
+      if (strequal(tmpname,s))
+	{
+	  strcpy(s,mangled_stack[i]);
+	  break;
+	}
+      if (check_extension && !strchr(mangled_stack[i],'.'))
+	{
+	  strcpy(tmpname,mangled_stack[i]);
+	  strcat(tmpname,extension);
+	  mangle_name_83(tmpname);
+	  if (strequal(tmpname,s))
+	    {
+	      strcpy(s,mangled_stack[i]);
+	      strcat(s,extension);
+	      break;
+	    }	  
+	}
+    }
+
+  if (i < mangled_stack_len)
+    {
+      DEBUG(3,("Found %s on mangled stack as %s\n",s,mangled_stack[i]));
+      array_promote(mangled_stack[0],sizeof(fstring),i);
+      return(True);      
+    }
+
+  return(False);
+}	
+
+static char *map_filename(char *s, /* This is null terminated */
+			  char *pattern, /* This isn't. */
+			  int len) /* This is the length of pattern. */
+{
+  static pstring matching_bit;  /* The bit of the string which matches */
+                                /* a * in pattern if indeed there is a * */
+  char *sp;                     /* Pointer into s. */
+  char *pp;                     /* Pointer into p. */
+  char *match_start;            /* Where the matching bit starts. */
+  pstring pat;
+
+  StrnCpy(pat, pattern, len);   /* Get pattern into a proper string! */
+  strcpy(matching_bit,"");      /* Match but no star gets this. */
+  pp = pat;                     /* Initialise the pointers. */
+  sp = s;
+  if ((len == 1) && (*pattern == '*')) {
+    return NULL;                /* Impossible, too ambiguous for */
+                                /* words! */
+  }
+
+  while ((*sp)                  /* Not the end of the string. */
+         && (*pp)               /* Not the end of the pattern. */
+         && (*sp == *pp)        /* The two match. */
+         && (*pp != '*')) {     /* No wildcard. */
+    sp++;                       /* Keep looking. */
+    pp++;
+  }
+  if (!*sp && !*pp)             /* End of pattern. */
+    return matching_bit;        /* Simple match.  Return empty string. */
+  if (*pp == '*') {
+    pp++;                       /* Always interrested in the chacter */
+                                /* after the '*' */
+    if (!*pp) {                 /* It is at the end of the pattern. */
+      StrnCpy(matching_bit, s, sp-s);
+      return matching_bit;
+    } else {
+      /* The next character in pattern must match a character further */
+      /* along s than sp so look for that character. */
+      match_start = sp;
+      while ((*sp)              /* Not the end of s. */
+             && (*sp != *pp))   /* Not the same  */
+        sp++;                   /* Keep looking. */
+      if (!*sp) {               /* Got to the end without a match. */
+        return NULL;
+      } else {                  /* Still hope for a match. */
+        /* Now sp should point to a matching character. */
+        StrnCpy(matching_bit, match_start, sp-match_start);
+        /* Back to needing a stright match again. */
+        while ((*sp)            /* Not the end of the string. */
+               && (*pp)         /* Not the end of the pattern. */
+               && (*sp == *pp)) { /* The two match. */
+          sp++;                 /* Keep looking. */
+          pp++;
+        }
+        if (!*sp && !*pp)       /* Both at end so it matched */
+          return matching_bit;
+        else
+          return NULL;
+      }
+    }
+  }
+  return NULL;                  /* No match. */
+}
+
+
+/* this is the magic char used for mangling */
+char magic_char = '~';
+
+
+/****************************************************************************
+determine whther is name could be a mangled name
+****************************************************************************/
+BOOL is_mangled(char *s)
+{
+  char *m = strchr(s,magic_char);
+  if (!m) return(False);
+
+  /* we use two base 36 chars efore the extension */
+  if (m[1] == '.' || m[1] == 0 ||
+      m[2] == '.' || m[2] == 0 ||
+      (m[3] != '.' && m[3] != 0))
+    return(is_mangled(m+1));
+
+  /* it could be */
+  return(True);
+}
+
+
+
+/****************************************************************************
+return a base 36 character. v must be from 0 to 35.
+****************************************************************************/
+static char base36(int v)
+{
+  v = v % 36;
+  if (v < 10)
+    return('0'+v);
+  else /* needed to work around a DEC C compiler bug */
+    return('A' + (v-10));
+}
+
+
+static void do_fwd_mangled_map(char *s, char *MangledMap)
+{
+  /* MangledMap is a series of name pairs in () separated by spaces.
+   * If s matches the first of the pair then the name given is the
+   * second of the pair.  A * means any number of any character and if
+   * present in the second of the pair as well as the first the
+   * matching part of the first string takes the place of the * in the
+   * second.
+   *
+   * I wanted this so that we could have RCS files which can be used
+   * by UNIX and DOS programs.  My mapping string is (RCS rcs) which
+   * converts the UNIX RCS file subdirectory to lowercase thus
+   * preventing mangling.
+   */
+  char *start=MangledMap;       /* Use this to search for mappings. */
+  char *end;                    /* Used to find the end of strings. */
+  char *match_string;
+  pstring new_string;           /* Make up the result here. */
+  char *np;                     /* Points into new_string. */
+
+  DEBUG(5,("Mangled Mapping '%s' map '%s'\n", s, MangledMap));
+  while (*start) {
+    while ((*start) && (*start != '('))
+      start++;
+    start++;                    /* Skip the ( */
+    if (!*start)
+      continue;                 /* Always check for the end. */
+    end = start;                /* Search for the ' ' or a ')' */
+    DEBUG(5,("Start of first in pair '%s'\n", start));
+    while ((*end) && !((*end == ' ') || (*end == ')')))
+      end++;
+    if (!*end) {
+      start = end;
+      continue;                 /* Always check for the end. */
+    }
+    DEBUG(5,("End of first in pair '%s'\n", end));
+    if ((match_string = map_filename(s, start, end-start))) {
+      DEBUG(5,("Found a match\n"));
+      /* Found a match. */
+      start = end+1;            /* Point to start of what it is to become. */
+      DEBUG(5,("Start of second in pair '%s'\n", start));
+      end = start;
+      np = new_string;
+      while ((*end)             /* Not the end of string. */
+             && (*end != ')')   /* Not the end of the pattern. */
+             && (*end != '*'))  /* Not a wildcard. */
+        *np++ = *end++;
+      if (!*end) {
+        start = end;
+        continue;               /* Always check for the end. */
+      }
+      if (*end == '*') {
+        strcpy(np, match_string);
+        np += strlen(match_string);
+        end++;                  /* Skip the '*' */
+        while ((*end)             /* Not the end of string. */
+               && (*end != ')')   /* Not the end of the pattern. */
+               && (*end != '*'))  /* Not a wildcard. */
+          *np++ = *end++;
+      }
+      if (!*end) {
+        start = end;
+        continue;               /* Always check for the end. */
+      }
+      *np++ = '\0';             /* NULL terminate it. */
+      DEBUG(5,("End of second in pair '%s'\n", end));
+      strcpy(s, new_string);    /* Substitute with the new name. */
+      DEBUG(5,("s is now '%s'\n", s));
+    }
+    start = end;              /* Skip a bit which cannot be wanted */
+    /* anymore. */
+    start++;
+  }
+}
+
+/****************************************************************************
+do the actual mangling to 8.3 format
+****************************************************************************/
+void mangle_name_83(char *s)
+{
+  int csum = str_checksum(s);
+  char *p;
+  char extension[4];
+  char base[9];
+  int baselen = 0;
+  int extlen = 0;
+
+  extension[0]=0;
+  base[0]=0;
+
+  p = strrchr(s,'.');  
+  if (p && (strlen(p+1)<4) )
+    {
+      BOOL all_normal = (strisnormal(p+1)); /* XXXXXXXXX */
+      if (all_normal && p[1] != 0)
+	{
+	  *p = 0;
+	  csum = str_checksum(s);
+	  *p = '.';
+	}
+    }
+      
+
+  strupper(s);
+
+  DEBUG(5,("Mangling name %s to ",s));
+
+  if (p)
+    {
+      if (p == s)
+	strcpy(extension,"___");
+      else
+	{
+	  *p++ = 0;
+	  while (*p && extlen < 3)
+	    {
+	      if (isdoschar(*p) && *p != '.')
+		extension[extlen++] = *p;
+	      p++;
+	    }
+	  extension[extlen] = 0;
+	}
+    }
+
+  p = s;
+
+  while (*p && baselen < 5)
+    {
+      if (isdoschar(*p) && *p != '.')
+	base[baselen++] = *p;
+      p++;
+    }
+  base[baselen] = 0;
+
+  csum = csum % (36*36);
+
+    sprintf(s,"%s%c%c%c",base,magic_char,base36(csum/36),base36(csum%36));
+
+  if (*extension)
+    {
+      strcat(s,".");
+      strcat(s,extension);
+    }
+  DEBUG(5,("%s\n",s));
+}
+
+
+
+/*******************************************************************
+  work out if a name is illegal, even for long names
+  ******************************************************************/
+static BOOL illegal_name(char *name)
+{
+  static unsigned char illegal[256];
+  static BOOL initialised=False;
+  unsigned char *s;
+
+  if (!initialised) {
+    char *ill = "*\\/?<>|\":{}";
+    initialised = True;
+  
+    bzero((char *)illegal,256);
+    for (s = (unsigned char *)ill; *s; s++)
+      illegal[*s] = True;
+  }
+
+#ifdef KANJI
+  for (s = (unsigned char *)name; *s;) {
+    if (is_shift_jis (*s)) {
+      s += 2;
+    } else if (illegal[*s]) {
+      return(True);
+    } else {
+      s++;
+    }
+  }
+#else
+  for (s = (unsigned char *)name;*s;s++)
+    if (illegal[*s]) return(True);
+#endif
+
+
+  return(False);
+}
+
+
+/****************************************************************************
+convert a filename to DOS format. return True if successful.
+****************************************************************************/
+BOOL name_map_mangle(char *OutName,BOOL need83,int snum)
+{
+#ifdef MANGLE_LONG_FILENAMES
+  if (!need83 && illegal_name(OutName)) need83 = True;
+#endif  
+
+  /* apply any name mappings */
+  {
+    char *map = lp_mangled_map(snum);
+    if (map && *map)
+      do_fwd_mangled_map(OutName,map);
+  }
+
+  /* check if it's already in 8.3 format */
+  if (need83 && !is_8_3(OutName)) {
+    if (!lp_manglednames(snum)) return(False);
+
+    /* mangle it into 8.3 */
+    push_mangled_name(OutName);  
+    mangle_name_83(OutName);
+  }
+  
+  return(True);
+}
+
-- 
cgit