fix TLV Parser BER long-form length parsing (#2289)

2026-06-20 08:59:30 +01:00
parent 9a8a279b82
commit 0a0d95bcbd
2 changed files with 57 additions and 7 deletions
@@ -52,5 +52,46 @@ TestRegister.addTests([
                "args": [1, 4, true] // length value is patently wrong, should be ignored by BER.
            }
        ]
+    },
+    {
+        name: "Parse TLV: BER long-form length (two-byte length encoding)",
+        input: "\x01\x82\x01\x00" + "A".repeat(256) + "\x02\x03\x41\x42\x43",
+        expectedOutput: JSON.stringify([
+            {"key": [1], "length": 256, "value": Array(256).fill(65)},
+            {"key": [2], "length": 3, "value": [65, 66, 67]}
+        ], null, 4),
+        recipeConfig: [
+            {
+                "op": "Parse TLV",
+                "args": [1, 1, true]
+            }
+        ]
+    },
+    {
+        name: "Parse TLV: BER long-form length (one-byte length encoding)",
+        input: "\x01\x81\x80" + "B".repeat(128),
+        expectedOutput: JSON.stringify([
+            {"key": [1], "length": 128, "value": Array(128).fill(66)}
+        ], null, 4),
+        recipeConfig: [
+            {
+                "op": "Parse TLV",
+                "args": [1, 1, true]
+            }
+        ]
+    },
+    {
+        name: "Parse TLV: BER multiple entries with mixed short and long-form lengths",
+        input: "\x01\x05\x48\x65\x6c\x6c\x6f\x02\x81\x05\x57\x6f\x72\x6c\x64",
+        expectedOutput: JSON.stringify([
+            {"key": [1], "length": 5, "value": [72, 101, 108, 108, 111]},
+            {"key": [2], "length": 5, "value": [87, 111, 114, 108, 100]}
+        ], null, 4),
+        recipeConfig: [
+            {
+                "op": "Parse TLV",
+                "args": [1, 1, true]
+            }
+        ]
    }
 ]);