diff --git a/testdata/readme.extra_data_before_central_directory b/testdata/readme.extra_data_before_central_directory
new file mode 100644
index 0000000..135026a
--- /dev/null
+++ b/testdata/readme.extra_data_before_central_directory
@@ -0,0 +1,66 @@
+Section 4.3.6 specifies the layout of a ZIP file:
+
+```
+ 4.3.6 Overall .ZIP file format:
+
+      [local file header 1]
+      [encryption header 1]
+      [file data 1]
+      [data descriptor 1]
+      . 
+      .
+      .
+      [local file header n]
+      [encryption header n]
+      [file data n]
+      [data descriptor n]
+      [archive decryption header] 
+      [archive extra data record] 
+      [central directory header 1]
+      .
+      .
+      .
+      [central directory header n]
+      [zip64 end of central directory record]
+      [zip64 end of central directory locator] 
+      [end of central directory record]
+```
+
+According to this layout there can be no layout between the last local file
+header and the first central directory header, yet there are many files in
+which this happens. As an example, Android packages store a signing block right
+after the last local file header:
+
+<https://source.android.com/docs/security/features/apksigning/v2>
+
+Although this is not allowed APK files can still be unpacked, as programs use
+the central directory to find the offsets to each individual file and
+effectively skip the extra data. None of the regular ZIP programs seem to be
+able to extract this extra data.
+
+To create a file with extra data only one field needs to be adapted (not
+tested for ZIP64 files) in the "end of central directory" (section 4.3.16),
+namely:
+
+```
+offset of start of central directory with respect to the starting disk number
+```
+
+The file `test_with_extra_data_before_central_directory.zip` is a modified
+version of `test.zip` with an addition 1024 bytes added in between the last
+local file header and the first central directory header. This means that the
+central directory is moved an additional 1024 bytes. This can be shown by
+comparing the output of `hexdump -C` for both files:
+
+The position of the central directory in the original file is `ba 03`:
+
+```
+00000470  00 00 ba 03 00 00 1a 00  54 68 69 73 20 69 73 20  |........This is |
+```
+
+In the new file the central directory has been moved 1024 bytes and is now
+`ba 07`:
+
+```
+00000870  00 00 ba 07 00 00 1a 00  54 68 69 73 20 69 73 20  |........This is |
+```
diff --git a/testdata/test_with_extra_data_before_central_directory.zip b/testdata/test_with_extra_data_before_central_directory.zip
new file mode 100644
index 0000000..57a4263
Binary files /dev/null and b/testdata/test_with_extra_data_before_central_directory.zip differ
diff --git a/ziplinter/src/snapshots/ziplinter__test__test_with_extra_data_before_central_directory.zip.snap b/ziplinter/src/snapshots/ziplinter__test__test_with_extra_data_before_central_directory.zip.snap
new file mode 100644
index 0000000..b46adb6
--- /dev/null
+++ b/ziplinter/src/snapshots/ziplinter__test__test_with_extra_data_before_central_directory.zip.snap
@@ -0,0 +1,271 @@
+---
+source: ziplinter/src/lib.rs
+expression: result
+---
+{
+  "comment": "This is a zipfile comment.",
+  "contents": [
+    {
+      "central": {
+        "comment": "",
+        "compressed_size": 25,
+        "crc32": 3287144384,
+        "creator_version": {
+          "host_system": "Unix",
+          "version": 30
+        },
+        "disk_nbr_start": 0,
+        "external_attrs": 2175008768,
+        "extra": [
+          85,
+          84,
+          5,
+          0,
+          3,
+          113,
+          252,
+          130,
+          76,
+          117,
+          120,
+          11,
+          0,
+          1,
+          4,
+          245,
+          1,
+          0,
+          0,
+          4,
+          20,
+          0,
+          0,
+          0
+        ],
+        "flags": 0,
+        "header_offset": 0,
+        "internal_attrs": 1,
+        "method": "Deflate",
+        "mode": 420,
+        "modified": "2010-09-05T02:12:01Z",
+        "name": "test.txt",
+        "reader_version": {
+          "host_system": "MsDos",
+          "version": 20
+        },
+        "uncompressed_size": 26
+      },
+      "local": {
+        "accessed": null,
+        "compressed_size": 25,
+        "crc32": 3287144384,
+        "created": null,
+        "extra": [
+          85,
+          84,
+          9,
+          0,
+          3,
+          113,
+          252,
+          130,
+          76,
+          118,
+          252,
+          130,
+          76,
+          117,
+          120,
+          11,
+          0,
+          1,
+          4,
+          245,
+          1,
+          0,
+          0,
+          4,
+          20,
+          0,
+          0,
+          0
+        ],
+        "flags": 0,
+        "gid": 501,
+        "header_offset": 0,
+        "method": "Deflate",
+        "method_specific": "None",
+        "mode": 0,
+        "modified": "2010-09-05T02:12:01Z",
+        "name": "test.txt",
+        "reader_version": {
+          "host_system": "MsDos",
+          "version": 20
+        },
+        "uid": 501,
+        "uncompressed_size": 26
+      }
+    },
+    {
+      "central": {
+        "comment": "",
+        "compressed_size": 785,
+        "crc32": 1423258110,
+        "creator_version": {
+          "host_system": "Unix",
+          "version": 30
+        },
+        "disk_nbr_start": 0,
+        "external_attrs": 2175008768,
+        "extra": [
+          85,
+          84,
+          5,
+          0,
+          3,
+          58,
+          48,
+          131,
+          76,
+          117,
+          120,
+          11,
+          0,
+          1,
+          4,
+          245,
+          1,
+          0,
+          0,
+          4,
+          20,
+          0,
+          0,
+          0
+        ],
+        "flags": 0,
+        "header_offset": 91,
+        "internal_attrs": 0,
+        "method": "Store",
+        "mode": 420,
+        "modified": "2010-09-05T05:52:58Z",
+        "name": "gophercolor16x16.png",
+        "reader_version": {
+          "host_system": "MsDos",
+          "version": 10
+        },
+        "uncompressed_size": 785
+      },
+      "local": {
+        "accessed": null,
+        "compressed_size": 785,
+        "crc32": 1423258110,
+        "created": null,
+        "extra": [
+          85,
+          84,
+          9,
+          0,
+          3,
+          58,
+          48,
+          131,
+          76,
+          59,
+          48,
+          131,
+          76,
+          117,
+          120,
+          11,
+          0,
+          1,
+          4,
+          245,
+          1,
+          0,
+          0,
+          4,
+          20,
+          0,
+          0,
+          0
+        ],
+        "flags": 0,
+        "gid": 501,
+        "header_offset": 0,
+        "method": "Store",
+        "method_specific": "None",
+        "mode": 0,
+        "modified": "2010-09-05T05:52:58Z",
+        "name": "gophercolor16x16.png",
+        "reader_version": {
+          "host_system": "MsDos",
+          "version": 10
+        },
+        "uid": 501,
+        "uncompressed_size": 785
+      }
+    }
+  ],
+  "encoding": "Utf8",
+  "eocd": {
+    "dir": {
+      "inner": {
+        "dir_disk_nbr": 0,
+        "dir_records_this_disk": 2,
+        "directory_offset": 1978,
+        "directory_records": 2,
+        "directory_size": 168,
+        "disk_nbr": 0
+      },
+      "offset": 2146
+    },
+    "dir64": null,
+    "global_offset": 0
+  },
+  "parsed_ranges": [
+    {
+      "contains": "end of central directory record",
+      "end": 2194,
+      "start": 2146
+    },
+    {
+      "contains": "central directory header",
+      "end": 2056,
+      "filename": "test.txt",
+      "start": 1978
+    },
+    {
+      "contains": "central directory header",
+      "end": 2146,
+      "filename": "gophercolor16x16.png",
+      "start": 2056
+    },
+    {
+      "contains": "local file header",
+      "end": 66,
+      "filename": "test.txt",
+      "start": 0
+    },
+    {
+      "contains": "file data",
+      "end": 91,
+      "filename": "test.txt",
+      "start": 66
+    },
+    {
+      "contains": "local file header",
+      "end": 169,
+      "filename": "gophercolor16x16.png",
+      "start": 91
+    },
+    {
+      "contains": "file data",
+      "end": 954,
+      "filename": "gophercolor16x16.png",
+      "start": 169
+    }
+  ],
+  "size": 2194
+}