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Fix escape chars handing in Peach Fuzzer #65

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Merged
robertbaldyga merged 2 commits into from
Sep 12, 2026
Merged

Fix escape chars handing in Peach Fuzzer #65

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68d0a99
peach_fuzzer: Add missing escape characters
robertbaldyga Sep 12, 2026
fd4bf35
peach_fuzzer: Special case new line character
robertbaldyga Sep 12, 2026
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18 changes: 12 additions & 6 deletions test_tools/peach_fuzzer/peach_fuzzer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ class PeachFuzzer:
fuzzy_output_file = posixpath.join(base_dir, "fuzzedParams.txt")
tested_param_placeholder = b"{param}"
# escape backslash first, so it doesn't interfere with escaping other characters
escape_chars = '\\\n"\'&|;()`<>$! '
escape_chars = '\\\n\t"\'&|;()`<>$!*#~ '

@classmethod
def get_fuzzed_command(cls, command_template: str, count: int):
Expand Down Expand Up @@ -191,11 +191,17 @@ def _escape_special_chars(cls, fuzzed_str: bytes):
Escaping is done for example in order to make fuzzed string executable in Linux CLI
If fuzzed string will be used in other places, escape_chars list may be overwritten.
"""
for i in cls.escape_chars:
i = bytes(i, "utf-8")
if i in fuzzed_str[:]:
fuzzed_str = fuzzed_str.replace(i, b'\\' + i)
return fuzzed_str
escape_bytes = set(cls.escape_chars.encode("utf-8"))
escaped = bytearray()
for char in fuzzed_str:
if char not in escape_bytes:
escaped.append(char)
elif char == ord("\n"):
escaped += b"'\n'"
else:
escaped.append(ord("\\"))
escaped.append(char)
return bytes(escaped)

@classmethod
def _is_xml_config_prepared(cls):
Expand Down
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