def swap_keywords(payload):
# print("4")
symbols = {
# OR
"||": [" OR ", " || "],
" || ": [" OR ", "||"],
"OR": [" OR ", "||"],
" OR ": [" OR ", "||", " || "],
# AND
"&&": [" AND ", " && "],
" && ": ["AND", " AND ", " && "],
"AND": [" AND ", "&&", " && "],
" AND ": [" AND ", "&&"],
# Not equals
"<>": ["!=", " NOT LIKE "],
"!=": [" != ", "<>", " <> ", " NOT LIKE "],
# Equals
" = ": [" LIKE ", "="],
"LIKE": [" LIKE ", "="],
}
symbols_in_payload = filter_candidates(symbols, payload)
if not symbols_in_payload:
return payload
# Randomly choose symbol
candidate_symbol = random.choice(symbols_in_payload)
# Check for possible replacements
replacements = symbols[candidate_symbol]
# Choose one replacement randomly
candidate_replacement = random.choice(replacements)
# Apply mutation at one random occurrence in the payload
return replace_random(payload, candidate_symbol, candidate_replacement)
def spaces_to_whitespaces_alternatives(payload):
# print("5")
symbols = {
" ": ["\t", "\n", "\f", "\v", "\xa0"],
"\t": [" ", "\n", "\f", "\v", "\xa0"],
"\n": ["\t", " ", "\f", "\v", "\xa0"],
"\f": ["\t", "\n", " ", "\v", "\xa0"],
"\v": ["\t", "\n", "\f", " ", "\xa0"],
"\xa0": ["\t", "\n", "\f", "\v", " "],
}
symbols_in_payload = filter_candidates(symbols, payload)
if not symbols_in_payload:
return payload
# Randomly choose symbol
candidate_symbol = random.choice(symbols_in_payload)
# Check for possible replacements
replacements = symbols[candidate_symbol]
# Choose one replacement randomly
candidate_replacement = random.choice(replacements)
# Apply mutation at one random occurrence in the payload
return replace_random(payload, candidate_symbol, candidate_replacement)
def comment_rewriting(payload):
p = random.random()
# print("2")
if p < 0.5 and ("#" in payload or "-- " in payload):
return payload + random_string(2)
elif p >= 0.5 and ("*/" in payload):
return replace_random(payload, "*/", random_string() + "*/")
else:
return payload
def spaces_to_comments(payload):
# TODO: make it selectable (can be mixed with other strategies)
symbols = {" ": ["/**/"], "/**/": [" "]}
symbols_in_payload = filter_candidates(symbols, payload)
if not symbols_in_payload:
return payload
# Randomly choose symbol
candidate_symbol = random.choice(symbols_in_payload)
# Check for possible replacements
replacements = symbols[candidate_symbol]
# Choose one replacement randomly
candidate_replacement = random.choice(replacements)
# Apply mutation at one random occurrence in the payload
return replace_random(payload, candidate_symbol, candidate_replacement)