From f6a2d7770ee10dd9326158fdbe0d3f31d990d10b Mon Sep 17 00:00:00 2001
From: Guido Draheim <guidod@gmx.de>
Date: Mon, 28 Jul 2003 03:02:16 +0000
Subject: [PATCH] This commit was generated by cvs2svn to compensate for
 changes in r63, which included commits to RCS files with non-trunk default
 branches.

---
 bins/zzxorcat.c | 107 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 bins/zzxorcat.c

diff --git a/bins/zzxorcat.c b/bins/zzxorcat.c
new file mode 100644
index 0000000..4ee8ab0
--- /dev/null
+++ b/bins/zzxorcat.c
@@ -0,0 +1,107 @@
+/*
+ *	Copyright (c) 2000,2001,2002 Guido Draheim <guidod@gmx.de>
+ *      Use freely under the restrictions of the ZLIB License
+ *
+ *      show zip-reading with xor-obfuscation. 
+ *      Note that the difference to the standard zzcat.c is quite small.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <zzip/zzip.h>
+#include <zzip/plugin.h>
+
+#if defined ZZIP_HAVE_UNISTD_H
+#include <unistd.h>
+#elif defined ZZIP_HAVE_IO_H
+#include <io.h>
+#else
+#error need posix io for this example
+#endif
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+static const char usage[] = 
+{
+    " zzxorcat [-#] <file>... \n"
+    "  - prints the file to stdout, so you may want to redirect the output; \n"
+    " the file is part of an inflated zip-archive obfuscated with xor value,\n"
+    " given by the numeric option (default is 0x55). \n"
+    " to get 'README' from dist.dat you may write \n"
+    "    zzcat dist/README \n"
+};
+
+static int xor_value;
+
+static zzip_ssize_t xor_read (int f, void* p, zzip_size_t l)
+{
+    zzip_ssize_t r = read(f, p, l);
+    zzip_ssize_t x; char* q; for (x=0, q=p; x < r; x++) q[x] ^= xor_value;
+    return r;
+}
+
+static struct zzip_plugin_io xor_handlers;
+static zzip_strings_t xor_fileext[] = { ".dat", "", 0 };
+
+int 
+main (int argc, char ** argv)
+{
+    int argn;
+    xor_value = 0x55;
+
+    if (argc <= 1)
+    {
+        printf (usage);
+        exit (0);
+    }
+
+    zzip_init_io (&xor_handlers, 0); xor_handlers.read = &xor_read;
+    
+    for (argn=1; argn < argc; argn++)
+    {
+	ZZIP_FILE* fp;
+
+	if (argv[argn][0] == '-')
+	{
+	    if (isdigit(argv[argn][1]))	xor_value = atoi (argv[argn]+1);
+	    continue;
+	}
+
+        fp = zzip_open_ext_io (argv[argn], O_RDONLY|O_BINARY,
+			       ZZIP_CASELESS|ZZIP_ONLYZIP,
+			       xor_fileext, &xor_handlers);
+        if (! fp)
+        {
+            perror (argv[argn]);
+            continue;
+        }else{
+            char buf[17];
+            zzip_ssize_t n;
+
+	    /* read chunks of 16 bytes into buf and print them to stdout */
+            while (0 < (n = zzip_read(fp, buf, 16)))
+            {
+                buf[n] = '\0';
+#	      ifdef STDOUT_FILENO
+                write (STDOUT_FILENO, buf, n);
+#	      else
+                fwrite (buf, 1, n, stdout);
+#             endif
+            }
+
+            if (n == -1) 
+                perror (argv[n]);
+        }
+    }
+    
+    return 0;
+} 
+
+/* 
+ * Local variables:
+ * c-file-style: "stroustrup"
+ * End:
+ */
-- 
2.40.0