From: Victor Wagner <vitus@wagner.pp.ru>
Date: Tue, 26 Apr 2016 15:38:02 +0000 (+0300)
Subject: Add detection of ZIP-archive and report that this type of file (i.e. OOXML or OpenDoc... 
X-Git-Tag: REL_0_95~9
X-Git-Url: http://www.wagner.pp.ru/gitweb/?p=oss%2Fcatdoc.git;a=commitdiff_plain;h=704c53839728067bb54c9c570916b77008388a23

Add detection of ZIP-archive and report that this type of file (i.e. OOXML or OpenDocument) is not supported by catdoc
---

diff --git a/src/analyze.c b/src/analyze.c
index bebcbef..1ac927e 100644
--- a/src/analyze.c
+++ b/src/analyze.c
@@ -12,7 +12,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "catdoc.h"
-char ole_sign[]={0xD0,0xCF,0x11,0xE0,0xA1,0xB1,0x1A,0xE1,0};
+extern char ole_sign[], zip_sign[]; /* from ole.c */
 char rtf_sign[]="{\\rtf";
 char old_word_sign[]={0xdb,0xa5,0};
 char write_sign[]={0x31,0xBE,0};
@@ -45,6 +45,10 @@ int analyze_format(FILE *f) {
 		return process_file(f,LONG_MAX);
 	} else if (strncmp((char *)&buffer,rtf_sign,4)==0) {
 		return parse_rtf(f);
+	} else if (strncmp((char *)&buffer, zip_sign,4) == 0) {
+		fprintf(stderr,"This file looks like ZIP archive or Office 2007 "
+		"or later file.\nNot supported by catdoc\n");
+		exit(1);
 	} else if (strncmp((char *)&buffer,old_word_sign,2)==0) {
 	   fread(buffer+4,1,124,f);	
 	   return parse_word_header(buffer,f,128,0);
diff --git a/src/ole.c b/src/ole.c
index 68fade8..805d8c7 100644
--- a/src/ole.c
+++ b/src/ole.c
@@ -37,8 +37,8 @@ long propCurNumber, propLen, propNumber, propStart;
 unsigned char *properties=NULL;
 long int fileLength=0;
 
-static char ole_sign[]={0xD0,0xCF,0x11,0xE0,0xA1,0xB1,0x1A,0xE1,0};
-
+char ole_sign[]={0xD0,0xCF,0x11,0xE0,0xA1,0xB1,0x1A,0xE1,0};
+char zip_sign[]="PK\003\004";
 
 /** 
  * Initializes ole structure
@@ -97,7 +97,10 @@ FILE* ole_init(FILE *f, void *buffer, size_t bufSize)  {
 	if ( ret != BBD_BLOCK_SIZE ) {
 		return NULL;
 	}
-	if (strncmp((char *)&oleBuf,ole_sign,8) != 0) {
+	if (strncmp((char *)&oleBuf,zip_sign,4) == 0) {
+		fprintf(stderr,"Looks like ZIP archive or Office 2007 or later. Not supported\n");
+		return NULL;
+	} else if (strncmp((char *)&oleBuf,ole_sign,8) != 0) {
 		return NULL;
 	}
  	sectorSize = 1<<getshort(oleBuf,0x1e);