1 files changed, 70 insertions, 0 deletions
diff --git a/regress/usr.bin/gzip/t1.sh b/regress/usr.bin/gzip/t1.sh
new file mode 100644
index 00000000000..8eb29931990
--- /dev/null
+++ b/regress/usr.bin/gzip/t1.sh
@@ -0,0 +1,70 @@
+#!/bin/sh
+# $OpenBSD: t1.sh,v 1.1 2008/08/20 09:29:51 mpf Exp $
+
+# Test if gzip(1) detects truncated or corrupted files
+
+# Copyright (c) 2008 Marco Pfatschbacher <mpf@openbsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+# truncate at 2k
+gzip < /etc/rc | dd bs=1k count=2 of=t1.gz 2>/dev/null
+if gzip -vt t1.gz; then
+	echo "=> ERROR: truncation not detected!"
+	exit 1
+else
+	echo "=> OK"
+fi
+
+# truncate at 1k
+gzip < /etc/rc | dd bs=1k count=1 of=t1.gz 2>/dev/null
+if gzip -vt t1.gz; then
+	echo "=> ERROR: truncation not detected!"
+	exit 1
+else
+	echo "=> OK"
+fi
+
+# skip some data in the middle
+gzip < /etc/rc | dd bs=1k seek=1 >> t1.gz 2>/dev/null
+if gzip -vt t1.gz; then
+	echo "=> ERROR: corruption not detected!"
+	exit 1
+else
+	echo "=> OK"
+fi
+
+# simple fuzzer that modifies one random byte at a random offset
+
+gzip < /etc/rc > t1.gz
+for i in `jot 100`; do
+	where=$((RANDOM % 2048 + 256)) # random offset (but skip the header)
+	orig=`dd if=t1.gz skip=$where bs=1 count=1 2>/dev/null |\
+	    hexdump -e '"%d"'`
+	fuzz=$((((orig + RANDOM) % 256) + 1))
+	if [ $fuzz = $orig ]; then
+		fuzz=$(((fuzz + 1) % 256))
+	fi
+	echo "$i/100: fuzzing byte @$where: $orig -> $fuzz"
+
+	if (dd if=t1.gz bs=1 count=$where 2>/dev/null; \
+	    echo -n \\0`printf "%o" $fuzz`; \
+	    dd if=t1.gz bs=1 skip=$((where+1)) 2>/dev/null) | gzip -tv; then
+		echo "=> ERROR: corruption not detected!"
+		exit 1
+	else
+		echo "=> OK"
+	fi
+done
+
+exit 0