diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..9eb6d8d
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,5 @@
+*.png filter=lfs diff=lfs merge=lfs -text
+*.jpg filter=lfs diff=lfs merge=lfs -text
+*.jpeg filter=lfs diff=lfs merge=lfs -text
+*.pdf filter=lfs diff=lfs merge=lfs -text
+*.enc filter=lfs diff=lfs merge=lfs -text
diff --git a/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.LICENSE.txt b/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.LICENSE.txt
new file mode 100644
index 0000000..b6d34e7
--- /dev/null
+++ b/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.LICENSE.txt
@@ -0,0 +1,3 @@
+The file 1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg is downloaded from Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg .
+
+Quoted from the web address: ... This photographic reproduction is therefore also considered to be in the public domain in the United States. In other jurisdictions, re-use of this content may be restricted ...
diff --git a/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg b/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg
new file mode 100644
index 0000000..87baf8b
--- /dev/null
+++ b/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b332c298be98be9968715952822431a051f9d07e67460cdcf91a5a3a305b5df1
+size 1141550
diff --git a/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg.enc b/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg.enc
new file mode 100644
index 0000000..a28a5b7
--- /dev/null
+++ b/tests/static_assets/mona_lisa/1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg.enc
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cf67abd791f1e230bce57dd47150f262424247cbefb8be16efcd57d13955576a
+size 1141568
diff --git a/tests/static_assets/mona_lisa/openssl_command.sh b/tests/static_assets/mona_lisa/openssl_command.sh
new file mode 100644
index 0000000..4e0df02
--- /dev/null
+++ b/tests/static_assets/mona_lisa/openssl_command.sh
@@ -0,0 +1,3 @@
+# The encryption file is produced by the following command.
+# A salt is explictly provided because we need reproducible output in tests.
+openssl enc -p -aes-256-cbc -S 8302F586FAB491EC -pbkdf2 -iter 10000 -pass pass:somepassword -in '1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg' -out 1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg.enc
diff --git a/tests/sometext.txt b/tests/static_assets/sometext.txt
similarity index 100%
rename from tests/sometext.txt
rename to tests/static_assets/sometext.txt
diff --git a/tests/test-encrypt.ts b/tests/test-encrypt.ts
index 9f5ba44..0977b41 100644
--- a/tests/test-encrypt.ts
+++ b/tests/test-encrypt.ts
@@ -1,8 +1,11 @@
 import * as fs from "fs";
+import * as path from "path";
 import { expect } from "chai";
-import { base64ToBase32 } from "../src/misc";
+import { base64ToBase32, bufferToArrayBuffer } from "../src/misc";
 import {
+  decryptArrayBuffer,
   decryptBase32ToString,
+  encryptArrayBuffer,
   encryptStringToBase32,
 } from "../src/encrypt";
 
@@ -29,9 +32,11 @@ describe("Encryption tests", () => {
     expect(dec).equal(k);
   });
 
-  it("should encrypt and get the same result as openssl", async () => {
+  it("should encrypt text file and get the same result as openssl", async () => {
     const fileContent = (
-      await fs.readFileSync(__dirname + "/sometext.txt")
+      await fs.readFileSync(
+        path.join(__dirname, "static_assets", "sometext.txt")
+      )
     ).toString("utf-8");
     const password = "somepassword";
     const saltHex = "8302F586FAB491EC";
@@ -52,4 +57,42 @@ describe("Encryption tests", () => {
 
     expect(enc).equal(opensslBase32Res);
   });
+
+  it("should encrypt binary file and get the same result as openssl", async () => {
+    const testFolder = path.join(__dirname, "static_assets", "mona_lisa");
+    const testFileName =
+      "1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg";
+    const fileArrBuf = bufferToArrayBuffer(
+      await fs.readFileSync(path.join(testFolder, testFileName))
+    );
+    const password = "somepassword";
+    const saltHex = "8302F586FAB491EC";
+    const enc = await encryptArrayBuffer(
+      fileArrBuf,
+      password,
+      undefined,
+      saltHex
+    );
+    const opensslArrBuf = bufferToArrayBuffer(
+      await fs.readFileSync(path.join(testFolder, testFileName + ".enc"))
+    );
+
+    expect(Buffer.from(enc).equals(Buffer.from(opensslArrBuf))).to.be.true;
+  });
+
+  it("should descypt binary file and get the same result as openssl", async () => {
+    const testFolder = path.join(__dirname, "static_assets", "mona_lisa");
+    const testFileName =
+      "1374px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched.jpg";
+    const fileArrBuf = bufferToArrayBuffer(
+      await fs.readFileSync(path.join(testFolder, testFileName + ".enc"))
+    );
+    const password = "somepassword";
+    const dec = await decryptArrayBuffer(fileArrBuf, password);
+    const opensslArrBuf = bufferToArrayBuffer(
+      await fs.readFileSync(path.join(testFolder, testFileName))
+    );
+
+    expect(Buffer.from(dec).equals(Buffer.from(opensslArrBuf))).to.be.true;
+  });
 });