Fix ChaCha operation Raw output

Previously, an array type error prevented any output when selecting
the 'Raw' output option for the ChaCha operation. This did not
show up in tests, as they all compared to hex values.

This also adds a test (relying on the 'To Hex' operation) that
catches this.

src/core/operations/ChaCha.mjs

@@ -191,7 +191,7 @@ ChaCha uses a nonce of 8 or 12 bytes (64 or 96 bits).`);
         if (outputType === "Hex") {
             return toHex(output);
         } else {
-            return Utils.arrayBufferToStr(output);
+            return Utils.arrayBufferToStr(Uint8Array.from(output).buffer);
         }
     }
 

tests/operations/tests/ChaCha.mjs

@@ -58,6 +58,25 @@ ChaCha uses a nonce of 8 or 12 bytes (64 or 96 bits).`,
             }
         ],
     },
+    {
+        name: "ChaCha: RFC8439 Raw output",
+        input: "Ladies and Gentlemen of the class of '99: If I could offer you only one tip for the future, sunscreen would be it.",
+        expectedOutput: "6e 2e 35 9a 25 68 f9 80 41 ba 07 28 dd 0d 69 81 e9 7e 7a ec 1d 43 60 c2 0a 27 af cc fd 9f ae 0b f9 1b 65 c5 52 47 33 ab 8f 59 3d ab cd 62 b3 57 16 39 d6 24 e6 51 52 ab 8f 53 0c 35 9f 08 61 d8 07 ca 0d bf 50 0d 6a 61 56 a3 8e 08 8a 22 b6 5e 52 bc 51 4d 16 cc f8 06 81 8c e9 1a b7 79 37 36 5a f9 0b bf 74 a3 5b e6 b4 0b 8e ed f2 78 5e 42 87 4d",
+        recipeConfig: [
+            {
+                "op": "ChaCha",
+                "args": [
+                    {"option": "Hex", "string": "00:01:02:03:04:05:06:07:08:09:0a:0b:0c:0d:0e:0f:10:11:12:13:14:15:16:17:18:19:1a:1b:1c:1d:1e:1f"},
+                    {"option": "Hex", "string": "00:00:00:00:00:00:00:4a:00:00:00:00"},
+                    1, "20", "Raw", "Raw",
+                ]
+            },
+            {
+                "op": "To Hex",
+                "args": []
+            },
+        ],
+    },
     {
         name: "ChaCha: draft-strombergson-chacha-test-vectors-01 TC7.1",
         input: "00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00",