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Patch: Escape character troubles (ITS#1753)

Browse source 
================
Written by Hallvard B. Furuseth and placed into the public domain.
This software is not subject to any license of the University of Oslo.
			================

maildap could address buf[-1] if len was < 2.

REWRITE_SUBMATCH_ESCAPE is '%', not '\'.

librewrite and saslautz could walk past the end of a string which
ended with an escape character.

Hallvard B. Furuseth <h.b.furuseth@usit.uio.no>, April 2002.
This commit is contained in:
Kurt Zeilenga 2002-04-15 18:29:39 +00:00
parent fc71d62b92
commit 02e8527248
5 changed files with 8 additions and 7 deletions
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2
clients/maildap/main.c
View file

@ -439,7 +439,7 @@ get_config_line( FILE *cf, int *lineno)
continue;
if ( strspn( buf, " \t\n" ) == len )
continue;
if ( buf[len-2] == '\\' ) {
if ( len >= 2 && buf[len-2] == '\\' ) {
pos = len - 2;
room = sizeof(buf) - pos;
continue;

7
libraries/librewrite/map.c
View file

@ -245,19 +245,20 @@ rewrite_map_parse(
for ( p = string, cnt = 1; p[ 0 ] != '\0' && cnt > 0; p++ ) {
if ( p[ 0 ] == REWRITE_SUBMATCH_ESCAPE ) {
/*
* '\' marks the beginning of a new map
* '%' marks the beginning of a new map
*/
if ( p[ 1 ] == '{' ) {
cnt++;
/*
* '\' followed by a digit may mark the beginning
* '%' followed by a digit may mark the beginning
* of an old map
*/
} else if ( isdigit( (unsigned char) p[ 1 ] ) && p[ 2 ] == '{' ) {
cnt++;
p++;
}
p++;
if ( p[ 1 ] != '\0' )
p++;
} else if ( p[ 0 ] == '}' ) {
cnt--;
}

2
libraries/librewrite/parse.c
View file

@ -45,7 +45,7 @@ parse_line(
}
for ( begin = p; p[ 0 ] != '\0'; p++ ) {
if ( p[ 0 ] == '\\' ) {
if ( p[ 0 ] == '\\' && p[ 1 ] != '\0' ) {
p++;
} else if ( p[ 0 ] == '\'' || p[ 0 ] == '\"') {
if ( in_quoted_field && p[ 0 ] == quote ) {

2
libraries/librewrite/subst.c
View file

@ -53,7 +53,7 @@ rewrite_subst_compile(
for ( p = begin = result, subs_len = 0; p[ 0 ] != '\0'; p++ ) {
/*
* Keep only single escapes '\'
* Keep only single escapes '%'
*/
if ( p[ 0 ] != REWRITE_SUBMATCH_ESCAPE ) {
continue;

2
servers/slapd/saslauthz.c
View file

@ -164,7 +164,7 @@ int slap_sasl_regexp_config( const char *match, const char *replace )
reg->sr_offset[0] = -2;
n = 1;
for ( c = reg->sr_replace; *c; c++ ) {
if ( *c == '\\' ) {
if ( *c == '\\' && c[1] ) {
c++;
continue;
}