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Adam Outler
2025-11-17 02:45:42 +00:00
parent 0cd7528284
commit f1ecc61de3
4 changed files with 875 additions and 205 deletions
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4
test/api_endpoints/test_nettools_endpoints.py
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@@ -149,8 +149,8 @@ def test_nslookup_endpoint(client, api_token, ip, expected_status):
@pytest.mark.parametrize("ip,mode,expected_status", [
("127.0.0.1", "fast", 200),
("127.0.0.1", "normal", 200),
("127.0.0.1", "detail", 200),
pytest.param("127.0.0.1", "normal", 200, marks=pytest.mark.feature_complete),
pytest.param("127.0.0.1", "detail", 200, marks=pytest.mark.feature_complete),
("127.0.0.1", "skipdiscovery", 200),
("127.0.0.1", "invalidmode", 400),
("999.999.999.999", "fast", 400),

659
test/backend/sql_safe_builder.py Normal file
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@@ -0,0 +1,659 @@
"""
NetAlertX SQL Safe Builder Module - Test Version
This module provides safe SQL condition building functionality to prevent
SQL injection vulnerabilities. It validates inputs against whitelists,
sanitizes data, and returns parameterized queries.
Standalone version for testing without dependencies.
"""
import re
from typing import Dict, List, Tuple, Any, Optional
class SafeConditionBuilder:
"""
A secure SQL condition builder that validates inputs against whitelists
and generates parameterized SQL snippets to prevent SQL injection.
"""
# Whitelist of allowed column names for filtering
ALLOWED_COLUMNS = {
"eve_MAC",
"eve_DateTime",
"eve_IP",
"eve_EventType",
"devName",
"devComments",
"devLastIP",
"devVendor",
"devAlertEvents",
"devAlertDown",
"devIsArchived",
"devPresentLastScan",
"devFavorite",
"devIsNew",
"Plugin",
"Object_PrimaryId",
"Object_SecondaryId",
"DateTimeChanged",
"Watched_Value1",
"Watched_Value2",
"Watched_Value3",
"Watched_Value4",
"Status",
}
# Whitelist of allowed comparison operators
ALLOWED_OPERATORS = {
"=",
"!=",
"<>",
"<",
">",
"<=",
">=",
"LIKE",
"NOT LIKE",
"IN",
"NOT IN",
"IS NULL",
"IS NOT NULL",
}
# Whitelist of allowed logical operators
ALLOWED_LOGICAL_OPERATORS = {"AND", "OR"}
# Whitelist of allowed event types
ALLOWED_EVENT_TYPES = {
"New Device",
"Connected",
"Disconnected",
"Device Down",
"Down Reconnected",
"IP Changed",
}
def __init__(self):
"""Initialize the SafeConditionBuilder."""
self.parameters = {}
self.param_counter = 0
def _generate_param_name(self, prefix: str = "param") -> str:
"""Generate a unique parameter name for SQL binding."""
self.param_counter += 1
return f"{prefix}_{self.param_counter}"
def _sanitize_string(self, value: str) -> str:
"""
Sanitize string input by removing potentially dangerous characters.
Args:
value: String to sanitize
Returns:
Sanitized string
"""
if not isinstance(value, str):
return str(value)
# Replace {s-quote} placeholder with single quote (maintaining compatibility)
value = value.replace("{s-quote}", "'")
# Remove any null bytes, control characters, and excessive whitespace
value = re.sub(r"[\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\x84\x86-\x9f]", "", value)
value = re.sub(r"\s+", " ", value.strip())
return value
def _validate_column_name(self, column: str) -> bool:
"""
Validate that a column name is in the whitelist.
Args:
column: Column name to validate
Returns:
True if valid, False otherwise
"""
return column in self.ALLOWED_COLUMNS
def _validate_operator(self, operator: str) -> bool:
"""
Validate that an operator is in the whitelist.
Args:
operator: Operator to validate
Returns:
True if valid, False otherwise
"""
return operator.upper() in self.ALLOWED_OPERATORS
def _validate_logical_operator(self, logical_op: str) -> bool:
"""
Validate that a logical operator is in the whitelist.
Args:
logical_op: Logical operator to validate
Returns:
True if valid, False otherwise
"""
return logical_op.upper() in self.ALLOWED_LOGICAL_OPERATORS
def build_safe_condition(self, condition_string: str) -> Tuple[str, Dict[str, Any]]:
"""
Parse and build a safe SQL condition from a user-provided string.
This method attempts to parse common condition patterns and convert
them to parameterized queries.
Args:
condition_string: User-provided condition string
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
Raises:
ValueError: If the condition contains invalid or unsafe elements
"""
if not condition_string or not condition_string.strip():
return "", {}
# Sanitize the input
condition_string = self._sanitize_string(condition_string)
# Reset parameters for this condition
self.parameters = {}
self.param_counter = 0
try:
return self._parse_condition(condition_string)
except Exception:
raise ValueError(f"Invalid condition format: {condition_string}")
def _parse_condition(self, condition: str) -> Tuple[str, Dict[str, Any]]:
"""
Parse a condition string into safe SQL with parameters.
This method handles both single and compound conditions:
- Single: AND devName = 'value'
- Compound: AND devName = 'value' AND devVendor = 'Apple'
- Multiple clauses with AND/OR operators
Args:
condition: Condition string to parse
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
"""
condition = condition.strip()
# Handle empty conditions
if not condition:
return "", {}
# Check if this is a compound condition (multiple clauses)
if self._is_compound_condition(condition):
return self._parse_compound_condition(condition)
# Single condition: extract leading logical operator if present
logical_op = None
clause_text = condition
# Check for leading AND
if condition.upper().startswith("AND ") or condition.upper().startswith(
"AND\t"
):
logical_op = "AND"
clause_text = condition[3:].strip()
# Check for leading OR
elif condition.upper().startswith("OR ") or condition.upper().startswith(
"OR\t"
):
logical_op = "OR"
clause_text = condition[2:].strip()
# Parse the single condition
return self._parse_single_condition(clause_text, logical_op)
def _is_compound_condition(self, condition: str) -> bool:
"""
Determine if a condition contains multiple clauses (compound condition).
A compound condition has multiple logical operators (AND/OR) connecting
separate comparison clauses.
Args:
condition: Condition string to check
Returns:
True if compound (multiple clauses), False if single clause
"""
# Track if we're inside quotes to avoid counting operators in quoted strings
in_quotes = False
logical_op_count = 0
i = 0
while i < len(condition):
char = condition[i]
# Toggle quote state
if char == "'":
in_quotes = not in_quotes
i += 1
continue
# Only count logical operators outside of quotes
if not in_quotes:
# Look for AND or OR as whole words
remaining = condition[i:].upper()
# Check for AND (must be word boundary)
if remaining.startswith("AND ") or remaining.startswith("AND\t"):
logical_op_count += 1
i += 3
continue
# Check for OR (must be word boundary)
if remaining.startswith("OR ") or remaining.startswith("OR\t"):
logical_op_count += 1
i += 2
continue
i += 1
# A compound condition has more than one logical operator
# (first AND/OR starts the condition, subsequent ones connect clauses)
return logical_op_count > 1
def _parse_compound_condition(self, condition: str) -> Tuple[str, Dict[str, Any]]:
"""
Parse a compound condition with multiple clauses.
Splits the condition into individual clauses, parses each one,
and reconstructs the full condition with all parameters.
Args:
condition: Compound condition string
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
"""
# Split the condition into individual clauses while preserving logical operators
clauses = self._split_by_logical_operators(condition)
# Parse each clause individually
parsed_parts = []
all_params = {}
for clause_text, logical_op in clauses:
# Parse this single clause
sql_part, params = self._parse_single_condition(clause_text, logical_op)
if sql_part:
parsed_parts.append(sql_part)
all_params.update(params)
if not parsed_parts:
raise ValueError("No valid clauses found in compound condition")
# Join all parsed parts
final_sql = " ".join(parsed_parts)
return final_sql, all_params
def _split_by_logical_operators(
self, condition: str
) -> List[Tuple[str, Optional[str]]]:
"""
Split a compound condition into individual clauses.
Returns a list of tuples: (clause_text, logical_operator)
The logical operator is the AND/OR that precedes the clause.
Args:
condition: Compound condition string
Returns:
List of (clause_text, logical_op) tuples
"""
clauses = []
current_clause = []
current_logical_op = None
in_quotes = False
i = 0
while i < len(condition):
char = condition[i]
# Toggle quote state
if char == "'":
in_quotes = not in_quotes
current_clause.append(char)
i += 1
continue
# Only look for logical operators outside of quotes
if not in_quotes:
remaining = condition[i:].upper()
# Check if we're at a word boundary (start of string or after whitespace)
at_word_boundary = i == 0 or condition[i - 1] in " \t"
# Check for AND (must be at word boundary)
if at_word_boundary and (
remaining.startswith("AND ") or remaining.startswith("AND\t")
):
# Save current clause if we have one
if current_clause:
clause_text = "".join(current_clause).strip()
if clause_text:
clauses.append((clause_text, current_logical_op))
current_clause = []
# Set the logical operator for the next clause
current_logical_op = "AND"
i += 3 # Skip 'AND'
# Skip whitespace after AND
while i < len(condition) and condition[i] in " \t":
i += 1
continue
# Check for OR (must be at word boundary)
if at_word_boundary and (
remaining.startswith("OR ") or remaining.startswith("OR\t")
):
# Save current clause if we have one
if current_clause:
clause_text = "".join(current_clause).strip()
if clause_text:
clauses.append((clause_text, current_logical_op))
current_clause = []
# Set the logical operator for the next clause
current_logical_op = "OR"
i += 2 # Skip 'OR'
# Skip whitespace after OR
while i < len(condition) and condition[i] in " \t":
i += 1
continue
# Add character to current clause
current_clause.append(char)
i += 1
# Don't forget the last clause
if current_clause:
clause_text = "".join(current_clause).strip()
if clause_text:
clauses.append((clause_text, current_logical_op))
return clauses
def _parse_single_condition(
self, condition: str, logical_op: Optional[str] = None
) -> Tuple[str, Dict[str, Any]]:
"""
Parse a single condition clause into safe SQL with parameters.
This method handles basic patterns like:
- devName = 'value' (with optional AND/OR prefix)
- devComments LIKE '%value%'
- eve_EventType IN ('type1', 'type2')
Args:
condition: Single condition string to parse
logical_op: Optional logical operator (AND/OR) to prepend
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
"""
condition = condition.strip()
# Handle empty conditions
if not condition:
return "", {}
# Simple pattern matching for common conditions
# Pattern 1: [AND/OR] column operator value (supporting Unicode in quoted strings)
pattern1 = r"^\s*(\w+)\s+(=|!=|<>|<|>|<=|>=|LIKE|NOT\s+LIKE)\s+\'([^\']*)\'\s*$"
match1 = re.match(pattern1, condition, re.IGNORECASE | re.UNICODE)
if match1:
column, operator, value = match1.groups()
return self._build_simple_condition(logical_op, column, operator, value)
# Pattern 2: [AND/OR] column IN ('val1', 'val2', ...)
pattern2 = r"^\s*(\w+)\s+(IN|NOT\s+IN)\s+\(([^)]+)\)\s*$"
match2 = re.match(pattern2, condition, re.IGNORECASE)
if match2:
column, operator, values_str = match2.groups()
return self._build_in_condition(logical_op, column, operator, values_str)
# Pattern 3: [AND/OR] column IS NULL/IS NOT NULL
pattern3 = r"^\s*(\w+)\s+(IS\s+NULL|IS\s+NOT\s+NULL)\s*$"
match3 = re.match(pattern3, condition, re.IGNORECASE)
if match3:
column, operator = match3.groups()
return self._build_null_condition(logical_op, column, operator)
# If no patterns match, reject the condition for security
raise ValueError(f"Unsupported condition pattern: {condition}")
def _build_simple_condition(
self, logical_op: Optional[str], column: str, operator: str, value: str
) -> Tuple[str, Dict[str, Any]]:
"""Build a simple condition with parameter binding."""
# Validate components
if not self._validate_column_name(column):
raise ValueError(f"Invalid column name: {column}")
if not self._validate_operator(operator):
raise ValueError(f"Invalid operator: {operator}")
if logical_op and not self._validate_logical_operator(logical_op):
raise ValueError(f"Invalid logical operator: {logical_op}")
# Generate parameter name and store value
param_name = self._generate_param_name()
self.parameters[param_name] = value
# Build the SQL snippet
sql_parts = []
if logical_op:
sql_parts.append(logical_op.upper())
sql_parts.extend([column, operator.upper(), f":{param_name}"])
return " ".join(sql_parts), self.parameters
def _build_in_condition(
self, logical_op: Optional[str], column: str, operator: str, values_str: str
) -> Tuple[str, Dict[str, Any]]:
"""Build an IN condition with parameter binding."""
# Validate components
if not self._validate_column_name(column):
raise ValueError(f"Invalid column name: {column}")
if logical_op and not self._validate_logical_operator(logical_op):
raise ValueError(f"Invalid logical operator: {logical_op}")
# Simple regex to extract quoted values
value_pattern = r"'([^']*)'"
matches = re.findall(value_pattern, values_str)
if not matches:
raise ValueError("No valid values found in IN clause")
# Generate parameters for each value
param_names = []
for value in matches:
param_name = self._generate_param_name()
self.parameters[param_name] = value
param_names.append(f":{param_name}")
# Build the SQL snippet
sql_parts = []
if logical_op:
sql_parts.append(logical_op.upper())
sql_parts.extend([column, operator.upper(), f"({', '.join(param_names)})"])
return " ".join(sql_parts), self.parameters
def _build_null_condition(
self, logical_op: Optional[str], column: str, operator: str
) -> Tuple[str, Dict[str, Any]]:
"""Build a NULL check condition."""
# Validate components
if not self._validate_column_name(column):
raise ValueError(f"Invalid column name: {column}")
if logical_op and not self._validate_logical_operator(logical_op):
raise ValueError(f"Invalid logical operator: {logical_op}")
# Build the SQL snippet (no parameters needed for NULL checks)
sql_parts = []
if logical_op:
sql_parts.append(logical_op.upper())
sql_parts.extend([column, operator.upper()])
return " ".join(sql_parts), {}
def build_device_name_filter(self, device_name: str) -> Tuple[str, Dict[str, Any]]:
"""
Build a safe device name filter condition.
Args:
device_name: Device name to filter for
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
"""
if not device_name:
return "", {}
device_name = self._sanitize_string(device_name)
param_name = self._generate_param_name("device_name")
self.parameters[param_name] = device_name
return f"AND devName = :{param_name}", self.parameters
def build_condition(
self, conditions: List[Dict[str, str]], logical_operator: str = "AND"
) -> Tuple[str, Dict[str, Any]]:
"""
Build a safe SQL condition from a list of condition dictionaries.
Args:
conditions: List of condition dicts with 'column', 'operator', 'value' keys
logical_operator: Logical operator to join conditions (AND/OR)
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
"""
if not conditions:
return "", {}
if not self._validate_logical_operator(logical_operator):
return "", {}
condition_parts = []
all_params = {}
for condition_dict in conditions:
try:
column = condition_dict.get("column", "")
operator = condition_dict.get("operator", "")
value = condition_dict.get("value", "")
# Validate each component
if not self._validate_column_name(column):
return "", {}
if not self._validate_operator(operator):
return "", {}
# Create parameter binding
param_name = self._generate_param_name()
all_params[param_name] = self._sanitize_string(str(value))
# Build condition part
condition_part = f"{column} {operator} :{param_name}"
condition_parts.append(condition_part)
except Exception:
return "", {}
if not condition_parts:
return "", {}
# Join all parts with the logical operator
final_condition = f" {logical_operator} ".join(condition_parts)
self.parameters.update(all_params)
return final_condition, self.parameters
def build_event_type_filter(
self, event_types: List[str]
) -> Tuple[str, Dict[str, Any]]:
"""
Build a safe event type filter condition.
Args:
event_types: List of event types to filter for
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
"""
if not event_types:
return "", {}
# Validate event types against whitelist
valid_types = []
for event_type in event_types:
event_type = self._sanitize_string(event_type)
if event_type in self.ALLOWED_EVENT_TYPES:
valid_types.append(event_type)
if not valid_types:
return "", {}
# Generate parameters for each valid event type
param_names = []
for event_type in valid_types:
param_name = self._generate_param_name("event_type")
self.parameters[param_name] = event_type
param_names.append(f":{param_name}")
sql_snippet = f"AND eve_EventType IN ({', '.join(param_names)})"
return sql_snippet, self.parameters
def get_safe_condition_legacy(
self, condition_setting: str
) -> Tuple[str, Dict[str, Any]]:
"""
Convert legacy condition settings to safe parameterized queries.
This method provides backward compatibility for existing condition formats.
Args:
condition_setting: The condition string from settings
Returns:
Tuple of (safe_sql_snippet, parameters_dict)
"""
if not condition_setting or not condition_setting.strip():
return "", {}
try:
return self.build_safe_condition(condition_setting)
except ValueError:
# Return empty condition for safety
return "", {}

6
test/backend/test_safe_builder_unit.py
View File

@@ -6,11 +6,12 @@ This test file has minimal dependencies to ensure it can run in any environment.
import sys
import unittest
import re
from unittest.mock import Mock, patch
from unittest.mock import Mock
# Mock the logger module to avoid dependency issues
sys.modules['logger'] = Mock()
# Standalone version of SafeConditionBuilder for testing
class TestSafeConditionBuilder:
"""
@@ -92,7 +93,7 @@ class TestSafeConditionBuilder:
try:
return self._parse_condition(condition_string)
except Exception as e:
except Exception:
raise ValueError(f"Invalid condition format: {condition_string}")
def _parse_condition(self, condition):
@@ -262,7 +263,6 @@ class TestSafeConditionBuilderSecurity(unittest.TestCase):
# Ensure no leakage between calls
self.assertNotEqual(params1, params2)
def test_xss_prevention(self):
"""Test that XSS-like payloads in device names are handled safely."""
xss_payloads = [

411
test/backend/test_sql_injection_prevention.py
View File

@@ -8,8 +8,7 @@ properly addressed in the reporting.py module.
import sys
import os
import unittest
from unittest.mock import Mock, patch, MagicMock
import pytest
# Add parent directory to path
sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'server'))
@@ -19,203 +18,215 @@ sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', 'server', 'db')
from sql_safe_builder import SafeConditionBuilder
class TestSQLInjectionPrevention(unittest.TestCase):
"""Test suite for SQL injection prevention."""
def setUp(self):
"""Set up test fixtures."""
self.builder = SafeConditionBuilder()
def test_sql_injection_attempt_single_quote(self):
"""Test that single quote injection attempts are blocked."""
malicious_input = "'; DROP TABLE users; --"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when invalid
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_sql_injection_attempt_union(self):
"""Test that UNION injection attempts are blocked."""
malicious_input = "1' UNION SELECT * FROM passwords --"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when invalid
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_sql_injection_attempt_or_true(self):
"""Test that OR 1=1 injection attempts are blocked."""
malicious_input = "' OR '1'='1"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when invalid
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_valid_simple_condition(self):
"""Test that valid simple conditions are handled correctly."""
valid_input = "AND devName = 'Test Device'"
condition, params = self.builder.get_safe_condition_legacy(valid_input)
# Should create parameterized query
self.assertIn("AND devName = :", condition)
self.assertEqual(len(params), 1)
self.assertIn('Test Device', list(params.values()))
def test_empty_condition(self):
"""Test that empty conditions are handled safely."""
empty_input = ""
condition, params = self.builder.get_safe_condition_legacy(empty_input)
# Should return empty condition
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_whitespace_only_condition(self):
"""Test that whitespace-only conditions are handled safely."""
whitespace_input = " \n\t "
condition, params = self.builder.get_safe_condition_legacy(whitespace_input)
# Should return empty condition
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_multiple_conditions_valid(self):
"""Test that single valid conditions are handled correctly."""
# Test with a single condition first (our current parser handles single conditions well)
valid_input = "AND devName = 'Device1'"
condition, params = self.builder.get_safe_condition_legacy(valid_input)
# Should create parameterized query
self.assertIn("devName = :", condition)
self.assertEqual(len(params), 1)
self.assertIn('Device1', list(params.values()))
def test_disallowed_column_name(self):
"""Test that non-whitelisted column names are rejected."""
invalid_input = "AND malicious_column = 'value'"
condition, params = self.builder.get_safe_condition_legacy(invalid_input)
# Should return empty condition when column not in whitelist
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_disallowed_operator(self):
"""Test that non-whitelisted operators are rejected."""
invalid_input = "AND devName SOUNDS LIKE 'test'"
condition, params = self.builder.get_safe_condition_legacy(invalid_input)
# Should return empty condition when operator not allowed
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_nested_select_attempt(self):
"""Test that nested SELECT attempts are blocked."""
malicious_input = "AND devName IN (SELECT password FROM users)"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when nested SELECT detected
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_hex_encoding_attempt(self):
"""Test that hex-encoded injection attempts are blocked."""
malicious_input = "AND 0x44524f50205441424c45"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when hex encoding detected
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_comment_injection_attempt(self):
"""Test that comment injection attempts are handled."""
malicious_input = "AND devName = 'test' /* comment */ --"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Comments should be stripped and condition validated
if condition:
self.assertNotIn("/*", condition)
self.assertNotIn("--", condition)
def test_special_placeholder_replacement(self):
"""Test that {s-quote} placeholder is safely replaced."""
input_with_placeholder = "AND devName = {s-quote}Test{s-quote}"
condition, params = self.builder.get_safe_condition_legacy(input_with_placeholder)
# Should handle placeholder safely
if condition:
self.assertNotIn("{s-quote}", condition)
self.assertIn("devName = :", condition)
def test_null_byte_injection(self):
"""Test that null byte injection attempts are blocked."""
malicious_input = "AND devName = 'test\x00' DROP TABLE --"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Null bytes should be sanitized
if condition:
self.assertNotIn("\x00", condition)
for value in params.values():
self.assertNotIn("\x00", str(value))
def test_build_condition_with_allowed_values(self):
"""Test building condition with specific allowed values."""
conditions = [
{"column": "eve_EventType", "operator": "=", "value": "Connected"},
{"column": "devName", "operator": "LIKE", "value": "%test%"}
]
condition, params = self.builder.build_condition(conditions, "AND")
# Should create valid parameterized condition
self.assertIn("eve_EventType = :", condition)
self.assertIn("devName LIKE :", condition)
self.assertEqual(len(params), 2)
def test_build_condition_with_invalid_column(self):
"""Test that invalid columns in build_condition are rejected."""
conditions = [
{"column": "invalid_column", "operator": "=", "value": "test"}
]
condition, params = self.builder.build_condition(conditions)
# Should return empty when invalid column
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_case_variations_injection(self):
"""Test that case variation injection attempts are blocked."""
malicious_inputs = [
"AnD 1=1",
"oR 1=1",
"UnIoN SeLeCt * FrOm users"
]
for malicious_input in malicious_inputs:
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should handle case variations safely
if "union" in condition.lower() or "select" in condition.lower():
self.fail(f"Injection not blocked: {malicious_input}")
def test_time_based_injection_attempt(self):
"""Test that time-based injection attempts are blocked."""
malicious_input = "AND IF(1=1, SLEEP(5), 0)"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when SQL functions detected
self.assertEqual(condition, "")
self.assertEqual(params, {})
def test_stacked_queries_attempt(self):
"""Test that stacked query attempts are blocked."""
malicious_input = "'; INSERT INTO admin VALUES ('hacker', 'password'); --"
condition, params = self.builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when semicolon detected
self.assertEqual(condition, "")
self.assertEqual(params, {})
@pytest.fixture
def builder():
"""Fixture to provide a SafeConditionBuilder instance."""
return SafeConditionBuilder()
if __name__ == '__main__':
# Run the tests
unittest.main(verbosity=2)
def test_sql_injection_attempt_single_quote(builder):
"""Test that single quote injection attempts are blocked."""
malicious_input = "'; DROP TABLE users; --"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when invalid
assert condition == ""
assert params == {}
def test_sql_injection_attempt_union(builder):
"""Test that UNION injection attempts are blocked."""
malicious_input = "1' UNION SELECT * FROM passwords --"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when invalid
assert condition == ""
assert params == {}
def test_sql_injection_attempt_or_true(builder):
"""Test that OR 1=1 injection attempts are blocked."""
malicious_input = "' OR '1'='1"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when invalid
assert condition == ""
assert params == {}
def test_valid_simple_condition(builder):
"""Test that valid simple conditions are handled correctly."""
valid_input = "AND devName = 'Test Device'"
condition, params = builder.get_safe_condition_legacy(valid_input)
# Should create parameterized query
assert "AND devName = :" in condition
assert len(params) == 1
assert 'Test Device' in list(params.values())
def test_empty_condition(builder):
"""Test that empty conditions are handled safely."""
empty_input = ""
condition, params = builder.get_safe_condition_legacy(empty_input)
# Should return empty condition
assert condition == ""
assert params == {}
def test_whitespace_only_condition(builder):
"""Test that whitespace-only conditions are handled safely."""
whitespace_input = " \n\t "
condition, params = builder.get_safe_condition_legacy(whitespace_input)
# Should return empty condition
assert condition == ""
assert params == {}
def test_multiple_conditions_valid(builder):
"""Test that single valid conditions are handled correctly."""
# Test with a single condition first (our current parser handles single conditions well)
valid_input = "AND devName = 'Device1'"
condition, params = builder.get_safe_condition_legacy(valid_input)
# Should create parameterized query
assert "devName = :" in condition
assert len(params) == 1
assert 'Device1' in list(params.values())
def test_disallowed_column_name(builder):
"""Test that non-whitelisted column names are rejected."""
invalid_input = "AND malicious_column = 'value'"
condition, params = builder.get_safe_condition_legacy(invalid_input)
# Should return empty condition when column not in whitelist
assert condition == ""
assert params == {}
def test_disallowed_operator(builder):
"""Test that non-whitelisted operators are rejected."""
invalid_input = "AND devName SOUNDS LIKE 'test'"
condition, params = builder.get_safe_condition_legacy(invalid_input)
# Should return empty condition when operator not allowed
assert condition == ""
assert params == {}
def test_nested_select_attempt(builder):
"""Test that nested SELECT attempts are blocked."""
malicious_input = "AND devName IN (SELECT password FROM users)"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when nested SELECT detected
assert condition == ""
assert params == {}
def test_hex_encoding_attempt(builder):
"""Test that hex-encoded injection attempts are blocked."""
malicious_input = "AND 0x44524f50205441424c45"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when hex encoding detected
assert condition == ""
assert params == {}
def test_comment_injection_attempt(builder):
"""Test that comment injection attempts are handled."""
malicious_input = "AND devName = 'test' /* comment */ --"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Comments should be stripped and condition validated
if condition:
assert "/*" not in condition
assert "--" not in condition
def test_special_placeholder_replacement(builder):
"""Test that {s-quote} placeholder is safely replaced."""
input_with_placeholder = "AND devName = {s-quote}Test{s-quote}"
condition, params = builder.get_safe_condition_legacy(input_with_placeholder)
# Should handle placeholder safely
if condition:
assert "{s-quote}" not in condition
assert "devName = :" in condition
def test_null_byte_injection(builder):
"""Test that null byte injection attempts are blocked."""
malicious_input = "AND devName = 'test\x00' DROP TABLE --"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Null bytes should be sanitized
if condition:
assert "\x00" not in condition
for value in params.values():
assert "\x00" not in str(value)
def test_build_condition_with_allowed_values(builder):
"""Test building condition with specific allowed values."""
conditions = [
{"column": "eve_EventType", "operator": "=", "value": "Connected"},
{"column": "devName", "operator": "LIKE", "value": "%test%"}
]
condition, params = builder.build_condition(conditions, "AND")
# Should create valid parameterized condition
assert "eve_EventType = :" in condition
assert "devName LIKE :" in condition
assert len(params) == 2
def test_build_condition_with_invalid_column(builder):
"""Test that invalid columns in build_condition are rejected."""
conditions = [
{"column": "invalid_column", "operator": "=", "value": "test"}
]
condition, params = builder.build_condition(conditions)
# Should return empty when invalid column
assert condition == ""
assert params == {}
def test_case_variations_injection(builder):
"""Test that case variation injection attempts are blocked."""
malicious_inputs = [
"AnD 1=1",
"oR 1=1",
"UnIoN SeLeCt * FrOm users"
]
for malicious_input in malicious_inputs:
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should handle case variations safely
if "union" in condition.lower() or "select" in condition.lower():
assert False, f"Injection not blocked: {malicious_input}"
def test_time_based_injection_attempt(builder):
"""Test that time-based injection attempts are blocked."""
malicious_input = "AND IF(1=1, SLEEP(5), 0)"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when SQL functions detected
assert condition == ""
assert params == {}
def test_stacked_queries_attempt(builder):
"""Test that stacked query attempts are blocked."""
malicious_input = "'; INSERT INTO admin VALUES ('hacker', 'password'); --"
condition, params = builder.get_safe_condition_legacy(malicious_input)
# Should return empty condition when semicolon detected
assert condition == ""
assert params == {}