BUG: Support UTF-16-LE Strings

pypdf/generic/_utils.py

@@ -144,7 +144,7 @@ def create_string_object(
             return TextStringObject(string.decode(forced_encoding))
         else:
             try:
-                if string.startswith(codecs.BOM_UTF16_BE):
+                if string.startswith((codecs.BOM_UTF16_BE, codecs.BOM_UTF16_LE)):
                     retval = TextStringObject(string.decode("utf-16"))
                     retval.autodetect_utf16 = True
                     return retval

tests/test_generic.py

@@ -1031,6 +1031,22 @@ def test_indirect_object_invalid_read():
     assert exc.value.args[0] == "Error reading indirect object reference at byte 0x5"
 
 
+def test_create_string_object_utf16be_bom():
+    result = create_string_object(
+        b"\xfe\xff\x00P\x00a\x00p\x00e\x00r\x00P\x00o\x00r\x00t\x00 \x001\x004\x00\x00"
+    )
+    assert result == "PaperPort 14\x00"
+    assert result.autodetect_utf16 is True
+
+
+def test_create_string_object_utf16le_bom():
+    result = create_string_object(
+        b"\xff\xfeP\x00a\x00p\x00e\x00r\x00P\x00o\x00r\x00t\x00 \x001\x004\x00\x00\x00"
+    )
+    assert result == "PaperPort 14\x00"
+    assert result.autodetect_utf16 is True
+
+
 def test_create_string_object_force():
     assert create_string_object(b"Hello World", []) == "Hello World"
     assert create_string_object(b"Hello World", {72: "A"}) == "Aello World"