Add comprehensive security tests for OWASP A03 (Injection) and A10 (SSRF)
- Implemented InjectionTests.cs to cover various injection vulnerabilities including SQL, NoSQL, Command, LDAP, and XPath injections. - Created SsrfTests.cs to test for Server-Side Request Forgery (SSRF) vulnerabilities, including internal URL access, cloud metadata access, and URL allowlist bypass attempts. - Introduced MaliciousPayloads.cs to store a collection of malicious payloads for testing various security vulnerabilities. - Added SecurityAssertions.cs for common security-specific assertion helpers. - Established SecurityTestBase.cs as a base class for security tests, providing common infrastructure and mocking utilities. - Configured the test project StellaOps.Security.Tests.csproj with necessary dependencies for testing.
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// =============================================================================
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// SecurityAssertions.cs
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// Security-specific assertion helpers for testing
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// =============================================================================
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using FluentAssertions;
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using System.Net;
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using System.Text.RegularExpressions;
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namespace StellaOps.Security.Tests.Infrastructure;
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/// <summary>
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/// Security-specific assertion methods for common security test patterns.
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/// </summary>
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public static partial class SecurityAssertions
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{
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/// <summary>
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/// Assert that a URL is safe (not an internal/metadata endpoint).
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/// </summary>
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public static void AssertUrlIsSafe(string url)
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{
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var uri = new Uri(url, UriKind.RelativeOrAbsolute);
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if (!uri.IsAbsoluteUri) return;
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// Check for localhost/loopback
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uri.Host.Should().NotBe("localhost", "URL should not point to localhost");
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uri.Host.Should().NotBe("127.0.0.1", "URL should not point to loopback");
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uri.Host.Should().NotBe("::1", "URL should not point to IPv6 loopback");
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uri.Host.Should().NotBe("0.0.0.0", "URL should not point to all interfaces");
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// Check for metadata endpoints
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uri.Host.Should().NotBe("169.254.169.254", "URL should not point to cloud metadata");
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uri.Host.Should().NotContain("metadata.google.internal", "URL should not point to GCP metadata");
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// Check for private IP ranges
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if (IPAddress.TryParse(uri.Host, out var ip))
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{
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IsPrivateIp(ip).Should().BeFalse("URL should not point to private IP addresses");
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}
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// Check for file:// scheme
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uri.Scheme.Should().NotBe("file", "URL should not use file:// scheme");
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}
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/// <summary>
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/// Assert that a path does not contain traversal sequences.
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/// </summary>
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public static void AssertNoPathTraversal(string path)
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{
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path.Should().NotContain("..", "Path should not contain traversal sequences");
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path.Should().NotContain("%2e%2e", "Path should not contain encoded traversal");
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path.Should().NotContain("%252e", "Path should not contain double-encoded traversal");
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path.Should().NotContain("\0", "Path should not contain null bytes");
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}
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/// <summary>
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/// Assert that content is properly escaped for HTML context.
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/// </summary>
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public static void AssertHtmlEscaped(string content, string originalInput)
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{
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if (originalInput.Contains('<'))
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{
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content.Should().NotContain("<script", "Content should have escaped script tags");
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content.Should().NotContain("<img", "Content should have escaped img tags");
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content.Should().NotContain("<svg", "Content should have escaped svg tags");
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}
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}
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/// <summary>
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/// Assert that a command string is safe from injection.
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/// </summary>
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public static void AssertCommandSafe(string command)
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{
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var dangerousChars = new[] { ";", "|", "&", "`", "$(" };
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foreach (var c in dangerousChars)
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{
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command.Should().NotContain(c, $"Command should not contain dangerous character: {c}");
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}
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}
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/// <summary>
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/// Assert that an HTTP response indicates proper authorization failure.
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/// </summary>
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public static void AssertProperAuthorizationDenial(HttpStatusCode statusCode)
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{
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statusCode.Should().BeOneOf(
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HttpStatusCode.Unauthorized,
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HttpStatusCode.Forbidden,
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"Response should properly deny unauthorized access");
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}
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/// <summary>
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/// Assert that no SQL injection was successful (result should not contain injected data).
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/// </summary>
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public static void AssertNoSqlInjectionSuccess(string response)
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{
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// Check for common signs that injection succeeded
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response.Should().NotMatchRegex(SqlPatternSuccess(),
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"Response should not indicate successful SQL injection");
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}
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/// <summary>
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/// Assert that cryptographic parameters meet minimum strength requirements.
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/// </summary>
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public static void AssertCryptographicStrength(int keyBits, string algorithm)
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{
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algorithm.ToUpperInvariant().Should().NotBe("MD5", "MD5 should not be used for security");
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algorithm.ToUpperInvariant().Should().NotBe("SHA1", "SHA1 should not be used for security");
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if (algorithm.Contains("RSA", StringComparison.OrdinalIgnoreCase))
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{
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keyBits.Should().BeGreaterOrEqualTo(2048, "RSA keys should be at least 2048 bits");
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}
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else if (algorithm.Contains("AES", StringComparison.OrdinalIgnoreCase))
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{
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keyBits.Should().BeGreaterOrEqualTo(128, "AES keys should be at least 128 bits");
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}
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}
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/// <summary>
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/// Assert that a JWT token has proper structure and is not tampered with.
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/// </summary>
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public static void AssertJwtNotTampered(string token)
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{
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var parts = token.Split('.');
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parts.Length.Should().Be(3, "JWT should have three parts");
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parts[2].Should().NotBeEmpty("JWT signature should not be empty");
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}
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/// <summary>
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/// Assert that headers do not contain injected values.
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/// </summary>
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public static void AssertNoHeaderInjection(IDictionary<string, string> headers)
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{
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foreach (var header in headers)
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{
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header.Key.Should().NotContain("\r", "Header name should not contain CR");
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header.Key.Should().NotContain("\n", "Header name should not contain LF");
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header.Value.Should().NotContain("\r\n", "Header value should not contain CRLF");
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}
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}
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/// <summary>
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/// Check if an IP address is in a private range.
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/// </summary>
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private static bool IsPrivateIp(IPAddress ip)
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{
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var bytes = ip.GetAddressBytes();
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// IPv4 private ranges
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if (bytes.Length == 4)
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{
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// 10.0.0.0/8
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if (bytes[0] == 10) return true;
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// 172.16.0.0/12
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if (bytes[0] == 172 && bytes[1] >= 16 && bytes[1] <= 31) return true;
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// 192.168.0.0/16
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if (bytes[0] == 192 && bytes[1] == 168) return true;
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// 127.0.0.0/8 (loopback)
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if (bytes[0] == 127) return true;
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// 169.254.0.0/16 (link-local)
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if (bytes[0] == 169 && bytes[1] == 254) return true;
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}
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return false;
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}
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[GeneratedRegex(@"(syntax error|mysql|postgresql|sqlite|ora-\d{5}|sql server)", RegexOptions.IgnoreCase)]
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private static partial Regex SqlPatternSuccess();
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}
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