BUG: Support UTF-16-LE Strings (#1884)

Fixes #1838

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

@@ -1035,6 +1035,22 @@ 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"