BUG: Fix stream truncated prematurely (#1223)

Observed in case of \0 - \9 in streams Closes #454
py-pdf · Aug 11, 2022 · 658bf28 · 658bf28
1 parent 2df8a4c
commit 658bf28
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diff --git a/PyPDF2/generic.py b/PyPDF2/generic.py
@@ -492,6 +492,7 @@ def read_string_from_stream(
                         if ntok.isdigit():
                             tok += ntok
                         else:
+                            stream.seek(-1, 1)  # ntok has to be analysed
                             break
                     tok = b_(chr(int(tok, base=8)))
                 elif tok in b"\n\r":

diff --git a/tests/test_generic.py b/tests/test_generic.py
@@ -157,7 +157,12 @@ def test_readStringFromStream_multichar_eol2():
 
 def test_readStringFromStream_excape_digit():
     stream = BytesIO(b"x\\1a )")
-    assert read_string_from_stream(stream) == "\x01 "
+    assert read_string_from_stream(stream) == "\x01a "
+
+
+def test_readStringFromStream_excape_digit2():
+    stream = BytesIO(b"(hello \\1\\2\\3\\4)")
+    assert read_string_from_stream(stream) == "hello \x01\x02\x03\x04"
 
 
 def test_NameObject():