1 files changed, 75 insertions, 0 deletions
diff --git a/neozip/test/test_inflate_sync.cc b/neozip/test/test_inflate_sync.cc
new file mode 100644
index 0000000000..a79d867e68
--- /dev/null
+++ b/neozip/test/test_inflate_sync.cc
@@ -0,0 +1,75 @@
+/* test_inflate_sync.cc - Test inflateSync using full flush deflate and corrupted data */
+
+#include "zbuild.h"
+#ifdef ZLIB_COMPAT
+#  include "zlib.h"
+#else
+#  include "zlib-ng.h"
+#endif
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "test_shared.h"
+
+#include <gtest/gtest.h>
+
+TEST(inflate, sync) {
+    PREFIX3(stream) c_stream, d_stream;
+    uint8_t compr[128], uncompr[128];
+    z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
+    int err;
+
+    memset(&c_stream, 0, sizeof(c_stream));
+
+    /* build compressed stream with full flush */
+    err = PREFIX(deflateInit)(&c_stream, Z_DEFAULT_COMPRESSION);
+    EXPECT_EQ(err, Z_OK);
+
+    c_stream.next_in  = (z_const unsigned char *)hello;
+    c_stream.next_out = compr;
+    c_stream.avail_in = 3;
+    c_stream.avail_out = (uint32_t)compr_len;
+
+    err = PREFIX(deflate)(&c_stream, Z_FULL_FLUSH);
+    EXPECT_EQ(err, Z_OK);
+
+    /* force an error in first compressed block */
+    compr[3]++;
+    c_stream.avail_in = hello_len-3;
+
+    err = PREFIX(deflate)(&c_stream, Z_FINISH);
+    EXPECT_EQ(err, Z_STREAM_END);
+
+    err = PREFIX(deflateEnd)(&c_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    compr_len = (z_size_t)c_stream.total_out;
+
+    memset(&d_stream, 0, sizeof(d_stream));
+    /* just read the zlib header */
+    d_stream.next_in = compr;
+    d_stream.avail_in = 2;
+
+    err = PREFIX(inflateInit)(&d_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    d_stream.next_out = uncompr;
+    d_stream.avail_out = (uint32_t)uncompr_len;
+
+    err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
+    EXPECT_EQ(err, Z_OK);
+
+    /* read all compressed data, but skip damaged part */
+    d_stream.avail_in = (uint32_t)compr_len-2;
+    err = PREFIX(inflateSync)(&d_stream);
+    EXPECT_EQ(err, Z_OK);
+
+    err = PREFIX(inflate)(&d_stream, Z_FINISH);
+    EXPECT_EQ(err, Z_STREAM_END);
+
+    err = PREFIX(inflateEnd)(&d_stream);
+    EXPECT_EQ(err, Z_OK);
+}