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Managed implementation of NTLM for Android and tvOS (#66879)
* Move MD4 implementation into Common/src/System/Net/Security * Add minimal RC4 implementation * WIP: Integrate managed Ntlm implementation into SocketsHttpHandler Co-authored-by: Tomas Weinfurt <[email protected]> * WIP: Makeshift tests for NTLM/Negotiate authentication * Fix compilation, clean up some of the hashing * Avoid using a temporary buffer * Add computation of signing keys, sealing keys and mechListMIC * Various cleanups * Send SPN in target information * Add some validation, mark spots with missing validation * Clean up some of the memory offset manipulation * Move NTLM version into static variable * Add support for channel bindings, clean up * Fix hash calculation in makeNtlm2Hash accidentally broken with last commit. Read NegTokenResp explicitly. Add mechListMIC reading and verification. * Verify last authentication token in HTTP Negotiate authentication * Address feedback * Fix tvOS builds by making few methods static * Enable System.Net.Security tests on Android and iOS Co-authored-by: Tomas Weinfurt <[email protected]> Co-authored-by: Steve Pfister <[email protected]>
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src/libraries/Common/src/System/Net/NTAuthentication.Managed.cs
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| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| // | ||
| // ARC4Managed.cs: Alleged RC4(tm) compatible symmetric stream cipher | ||
| // RC4 is a trademark of RSA Security | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining | ||
| // a copy of this software and associated documentation files (the | ||
| // "Software"), to deal in the Software without restriction, including | ||
| // without limitation the rights to use, copy, modify, merge, publish, | ||
| // distribute, sublicense, and/or sell copies of the Software, and to | ||
| // permit persons to whom the Software is furnished to do so, subject to | ||
| // the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be | ||
| // included in all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | ||
| // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | ||
| // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | ||
| // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| // | ||
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| using System; | ||
| using System.Buffers; | ||
| using System.Diagnostics; | ||
| using System.Security.Cryptography; | ||
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| namespace System.Net.Security | ||
| { | ||
| // References: | ||
| // a. Usenet 1994 - RC4 Algorithm revealed | ||
| // http://www.qrst.de/html/dsds/rc4.htm | ||
| internal class RC4 : IDisposable | ||
| { | ||
| private byte[]? state; | ||
| private byte x; | ||
| private byte y; | ||
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| public RC4(ReadOnlySpan<byte> key) | ||
| { | ||
| state = ArrayPool<byte>.Shared.Rent(256); | ||
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| byte index1 = 0; | ||
| byte index2 = 0; | ||
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| for (int counter = 0; counter < 256; counter++) | ||
| { | ||
| state[counter] = (byte)counter; | ||
| } | ||
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| for (int counter = 0; counter < 256; counter++) | ||
| { | ||
| index2 = (byte)(key[index1] + state[counter] + index2); | ||
| (state[counter], state[index2]) = (state[index2], state[counter]); | ||
| index1 = (byte)((index1 + 1) % key.Length); | ||
| } | ||
| } | ||
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| public void Dispose() | ||
| { | ||
| if (state != null) | ||
| { | ||
| x = 0; | ||
| y = 0; | ||
| CryptographicOperations.ZeroMemory(state.AsSpan(0, 256)); | ||
| ArrayPool<byte>.Shared.Return(state); | ||
| state = null; | ||
| } | ||
| } | ||
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| public void Transform(ReadOnlySpan<byte> input, Span<byte> output) | ||
| { | ||
| Debug.Assert(input.Length == output.Length); | ||
| Debug.Assert(state != null); | ||
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| for (int counter = 0; counter < input.Length; counter++) | ||
| { | ||
| x = (byte)(x + 1); | ||
| y = (byte)(state[x] + y); | ||
| (state[x], state[y]) = (state[y], state[x]); | ||
| byte xorIndex = (byte)(state[x] + state[y]); | ||
| output[counter] = (byte)(input[counter] ^ state[xorIndex]); | ||
| } | ||
| } | ||
| } | ||
| } |
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