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DoNotHardCodeEncryptionKeyTests.cs
815 lines (718 loc) · 25.8 KB
/
DoNotHardCodeEncryptionKeyTests.cs
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// Copyright (c) Microsoft. All Rights Reserved. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System.Collections.Generic;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Testing;
using Test.Utilities;
using Xunit;
using Xunit.Abstractions;
namespace Microsoft.NetCore.Analyzers.Security.UnitTests
{
public class DoNotHardCodeEncryptionKeyTests : TaintedDataAnalyzerTestBase
{
public DoNotHardCodeEncryptionKeyTests(ITestOutputHelper output)
: base(output)
{
}
protected override DiagnosticDescriptor Rule => DoNotHardCodeEncryptionKey.Rule;
protected override IEnumerable<string> AdditionalCSharpSources => new string[] { readOnlySpanAndAesGcmAndAesCcmCSharpSourceCode };
public const string readOnlySpanAndAesGcmAndAesCcmCSharpSourceCode = @"
namespace System
{
public struct ReadOnlySpan<T>
{
public ReadOnlySpan (T[] array)
{
}
}
}
namespace System.Security.Cryptography
{
public sealed class AesGcm
{
public AesGcm (byte[] key)
{
}
public AesGcm (ReadOnlySpan<byte> key)
{
}
}
public sealed class AesCcm
{
public AesCcm (byte[] key)
{
}
public AesCcm (ReadOnlySpan<byte> key)
{
}
}
}";
[Fact]
public void Test_HardcodedStaticReadonlyField__Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
internal static class Program
{
private static readonly Byte[] _key = { 1, 2, 3 };
private static void Main()
{
using (var aes = Aes.Create())
{
aes.Key = Program._key;
}
}
}");
// Ideally, we'd treat _key as hardcoded.
}
[Fact]
public void Test_HardcodedInString_CreateEncryptor_NeedValueContentAnalysis_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] key = Convert.FromBase64String(""AAAAAaazaoensuth"");
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}",
GetCSharpResultAt(11, 9, 9, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[] Convert.FromBase64String(string s)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_ASCIIEncodingGetBytesWithStringParameter_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System.Text;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] key = new ASCIIEncoding().GetBytes(""AAAAAaazaoensuth"");
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}",
GetCSharpResultAt(11, 9, 9, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[] Encoding.GetBytes(string s)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_EncodingUTF8GetBytesWithStringParameter_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System.Text;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] key = Encoding.UTF8.GetBytes(""AAAAAaazaoensuth"");
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}",
GetCSharpResultAt(11, 9, 9, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[] Encoding.GetBytes(string s)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_ASCIIEncodingGetBytesWithStringAndInt32AndInt32AndByteArrayAndInt32Parameters_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System.Text;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] key, byte[] someOtherBytesForIV)
{
new ASCIIEncoding().GetBytes(""AAAAAaazaoensuth"", 0, 3, key, 0);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}",
GetCSharpResultAt(11, 9, 9, 38, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] key, byte[] someOtherBytesForIV)", "string chars", "int ASCIIEncoding.GetBytes(string chars, int charIndex, int charCount, byte[] bytes, int byteIndex)"));
}
[Fact]
public void Test_HardcodedInStringWithVariable_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
string someHardCodedBase64String = ""AAAAAaazaoensuth"";
byte[] key = Convert.FromBase64String(someHardCodedBase64String);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}",
GetCSharpResultAt(12, 9, 10, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[] Convert.FromBase64String(string s)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInMultilinesString_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
string someHardCodedBase64String = ""sssdsdsdsdsdsds"" +
""sdasdsadasddsda"" +
""sdasdsadasddsda"" ;
byte[] key = Convert.FromBase64String(someHardCodedBase64String);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}",
GetCSharpResultAt(14, 9, 12, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[] Convert.FromBase64String(string s)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInByteArray_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] rgbKey = new byte[] {1, 2, 3};
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
}",
GetCSharpResultAt(11, 9, 9, 25, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_AesGcmWithByteArrayParameter_Diagnostic()
{
VerifyCSharpWithDependencies(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
byte[] key = new byte[] {1, 2, 3};
AesGcm aesGcm = new AesGcm(key);
}
}",
GetCSharpResultAt(10, 25, 9, 22, "AesGcm.AesGcm(byte[] key)", "void TestClass.TestMethod()", "byte[]", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_AesGcmWithReadOnlySpanParameter_Diagnostic()
{
VerifyCSharpWithDependencies(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
ReadOnlySpan<byte> key = new ReadOnlySpan<byte>(new byte[] {1, 2, 3});
AesGcm aesGcm = new AesGcm(key);
}
}",
GetCSharpResultAt(10, 25, 9, 57, "AesGcm.AesGcm(ReadOnlySpan<byte> key)", "void TestClass.TestMethod()", "byte[]", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_HardcodedInStringWithVariable_AesGcm_Diagnostic()
{
VerifyCSharpWithDependencies(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
string someHardCodedBase64String = ""AAAAAaazaoensuth"";
byte[] key = Convert.FromBase64String(someHardCodedBase64String);
AesGcm aesGcm = new AesGcm(key);
}
}",
GetCSharpResultAt(11, 25, 10, 22, "AesGcm.AesGcm(byte[] key)", "void TestClass.TestMethod()", "byte[] Convert.FromBase64String(string s)", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_AesCcmWithByteArrayParameter_Diagnostic()
{
VerifyCSharpWithDependencies(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
byte[] key = new byte[] {1, 2, 3};
AesCcm aesCcm = new AesCcm(key);
}
}",
GetCSharpResultAt(10, 25, 9, 22, "AesCcm.AesCcm(byte[] key)", "void TestClass.TestMethod()", "byte[]", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_AesCcmWithReadOnlySpanParameter_Diagnostic()
{
VerifyCSharpWithDependencies(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
ReadOnlySpan<byte> key = new ReadOnlySpan<byte>(new byte[] {1, 2, 3});
AesCcm aesCcm = new AesCcm(key);
}
}",
GetCSharpResultAt(10, 25, 9, 57, "AesCcm.AesCcm(ReadOnlySpan<byte> key)", "void TestClass.TestMethod()", "byte[]", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_HardcodedInStringWithVariable_AesCcm_Diagnostic()
{
VerifyCSharpWithDependencies(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
string someHardCodedBase64String = ""AAAAAaazaoensuth"";
byte[] key = Convert.FromBase64String(someHardCodedBase64String);
AesCcm aesCcm = new AesCcm(key);
}
}",
GetCSharpResultAt(11, 25, 10, 22, "AesCcm.AesCcm(byte[] key)", "void TestClass.TestMethod()", "byte[] Convert.FromBase64String(string s)", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_HardcodedInByteArray_CreateDecryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] rgbKey = new byte[] {1, 2, 3};
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateDecryptor(rgbKey, someOtherBytesForIV);
}
}",
GetCSharpResultAt(11, 9, 9, 25, "ICryptoTransform SymmetricAlgorithm.CreateDecryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInByteArrayWithVariable_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte b = 1;
byte[] rgbKey = new byte[] {b};
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
}",
GetCSharpResultAt(12, 9, 10, 25, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInByteArray_KeyProperty_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] rgbKey = new byte[] {1, 2, 3};
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.Key = rgbKey;
}
}",
GetCSharpResultAt(11, 9, 9, 25, "byte[] SymmetricAlgorithm.Key", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInByteArray_CreateEncryptorFromDerivedClassOfSymmetricAlgorithm_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] rgbKey = new byte[] {1, 2, 3};
Aes aes = Aes.Create();
aes.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
}",
GetCSharpResultAt(11, 9, 9, 25, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInByteArray_AesKey_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
using (var aes = Aes.Create())
{
aes.Key = new Byte[] { 1, 2, 3 };
}
}
}",
GetCSharpResultAt(11, 13, 11, 23, "byte[] SymmetricAlgorithm.Key", "void TestClass.TestMethod()", "byte[]", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_HardcodedInByteArray_CreateEncryptor_Multivalues_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] rgbKey = new byte[] {1, 2, 3};
Random r = new Random();
if (r.Next(6) == 4)
{
rgbKey = new byte[] {4, 5, 6};
}
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
}",
GetCSharpResultAt(18, 9, 14, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"),
GetCSharpResultAt(18, 9, 9, 25, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInByteArray_CreateEncryptor_WithoutAssignment_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(new byte[] {1, 2, 3}, someOtherBytesForIV);
}
}",
GetCSharpResultAt(10, 9, 10, 30, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_MaybeHardcoded_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV, byte[] rgbKey)
{
Random r = new Random();
if (r.Next(6) == 4)
{
rgbKey = new byte[] {4, 5, 6};
}
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
}",
GetCSharpResultAt(17, 9, 13, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV, byte[] rgbKey)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV, byte[] rgbKey)"));
}
[Fact]
public void Test_PassTaintedSourceInfoAsParameter_SinkMethodParameters_Interprocedual_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] key = Convert.FromBase64String(""AAAAAaazaoensuth"");
CreateEncryptor(key, someOtherBytesForIV);
}
public void CreateEncryptor(byte[] rgbKey, byte[] rgbIV)
{
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, rgbIV);
}
}",
GetCSharpResultAt(16, 9, 9, 22, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "byte[] Convert.FromBase64String(string s)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_PassTaintedSourceInfoAsParameter_SinkProperties_Interprocedual_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod()
{
byte[] key = Convert.FromBase64String(""AAAAAaazaoensuth"");
CreateEncryptor(key);
}
public void CreateEncryptor(byte[] rgbKey)
{
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.Key = rgbKey;
}
}",
GetCSharpResultAt(16, 9, 9, 22, "byte[] SymmetricAlgorithm.Key", "void TestClass.CreateEncryptor(byte[] rgbKey)", "byte[] Convert.FromBase64String(string s)", "void TestClass.TestMethod()"));
}
[Fact]
public void Test_HardcodedIn2DByteArray_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Linq;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[,] rgbKey = new byte[,] { { 1, 2, 3 }, { 4, 5, 6 } };
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey.Cast<byte>().ToArray(), someOtherBytesForIV);
}
}",
GetCSharpResultAt(12, 9, 10, 26, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[,]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_HardcodedInJaggedArrayInitializer_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Linq;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV, byte unknownByte)
{
byte[][] rgbKey = new byte[3][]
{
new byte[] { 1, 2 },
new byte[] { 3, 4, 5 },
new byte[] { unknownByte }
};
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey.Cast<byte>().ToArray(), someOtherBytesForIV);
}
}",
GetCSharpResultAt(17, 9, 13, 13, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV, byte unknownByte)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV, byte unknownByte)"),
GetCSharpResultAt(17, 9, 12, 13, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV, byte unknownByte)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV, byte unknownByte)"));
}
[Fact]
public void Test_HardcodeByParamsBytesArray_CreateEncryptor_Diagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] rgbKey = GetArray(1, 2, 3);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
public byte[] GetArray(params byte[] array)
{
return array;
}
}",
GetCSharpResultAt(11, 9, 9, 25, "ICryptoTransform SymmetricAlgorithm.CreateEncryptor(byte[] rgbKey, byte[] rgbIV)", "void TestClass.TestMethod(byte[] someOtherBytesForIV)", "byte[]", "void TestClass.TestMethod(byte[] someOtherBytesForIV)"));
}
[Fact]
public void Test_ASCIIEncodingGetBytesWithCharArrayParameter_CreateEncryptor_NoDiagnostic()
{
VerifyCSharp(@"
using System.Text;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(char[] chars, byte[] someOtherBytesForIV)
{
byte[] key = new ASCIIEncoding().GetBytes(chars);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}");
}
[Fact]
public void Test_ASCIIEncodingGetBytesWithCharArrayAndInt32AndInt32AndByteArrayAndInt32Parameters_CreateEncryptor_NoDiagnostic()
{
VerifyCSharp(@"
using System.Text;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(char[] chars, byte[] key, byte[] someOtherBytesForIV)
{
new ASCIIEncoding().GetBytes(chars, 0, 3, key, 0);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}");
}
[Fact]
public void Test_ASCIIEncodingGetBytesWithConstantCharArrayAndInt32AndInt32AndByteArrayAndInt32Parameters_CreateEncryptor_NoDiagnostic()
{
VerifyCSharp(@"
using System.Text;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] key, byte[] someOtherBytesForIV)
{
char[] chars = new char[] {'1', '2', '3'};
new ASCIIEncoding().GetBytes(chars, 0, 3, key, 0);
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}");
}
[Fact]
public void Test_ElementTypeIsTypeParameter_NoDiagnostic()
{
VerifyCSharp(@"
using System;
class TestClass<T1> where T1 : struct
{
public void MethodWithArrayParameter<T2>(params T2[] arr) where T2 : struct
{
}
public void TestMethod(T1 t)
{
MethodWithArrayParameter(t);
}
}");
}
[Fact]
public void Test_HardcodedInJaggedArray_CreateEncryptor_NoDiagnostic()
{
VerifyCSharp(@"
using System;
using System.Linq;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[][] rgbKey = new byte[2][];
rgbKey[0] = new byte[2] { 1, 2 };
rgbKey[1] = new byte[3] { 3, 4, 5 };
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey.Cast<byte>().ToArray(), someOtherBytesForIV);
}
}");
}
[Fact]
public void Test_NotHardcoded_CreateEncryptor_NoDiagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV, byte[] rgbKey)
{
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
}");
}
[Fact]
public void Test_HardcodedInArrayThenOverwrite_NoDiagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV, byte[] key)
{
byte[] rgbKey = new byte[] {1, 2, 3};
rgbKey = key;
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(rgbKey, someOtherBytesForIV);
}
}");
}
[Fact]
public void Test_NotHardcodedInString_CreateEncryptor_NoDiagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] key = Convert.FromBase64String(Console.ReadLine());
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}");
}
// For now, it doesn't support checking return tainted source info.
[Fact]
public void Test_ReturnTaintedSourceInfo_Interprocedual_NoDiagnostic()
{
VerifyCSharp(@"
using System;
using System.Security.Cryptography;
class TestClass
{
public byte[] GetKey()
{
return Convert.FromBase64String(""AAAAAaazaoensuth"");
}
public void TestMethod(byte[] someOtherBytesForIV)
{
byte[] key = GetKey();
SymmetricAlgorithm rijn = SymmetricAlgorithm.Create();
rijn.CreateEncryptor(key, someOtherBytesForIV);
}
}");
}
[Fact, WorkItem(2723, "https://github.com/dotnet/roslyn-analyzers/issues/2723")]
public void Test_ArrayInitializerInAttribute()
{
VerifyCSharp(@"
using System;
class MyAttr : Attribute
{
public MyAttr (byte[] array) { }
}
[MyAttr(new byte[]{ 1 })]
class C
{
}");
}
protected override DiagnosticAnalyzer GetBasicDiagnosticAnalyzer()
{
return new DoNotHardCodeEncryptionKey();
}
protected override DiagnosticAnalyzer GetCSharpDiagnosticAnalyzer()
{
return new DoNotHardCodeEncryptionKey();
}
}
}