Support ChaCha20 Poly1305 on Unix #52522
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Tagging subscribers to this area: @bartonjs, @vcsjones, @krwq, @GrabYourPitchforks Issue DetailsContributes to #52482
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Draft for now, I suspect there will be compilation failures on older Linux. |
src/libraries/Native/Unix/System.Security.Cryptography.Native/opensslshim.h
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src/libraries/Native/Unix/System.Security.Cryptography.Native/pal_evp_cipher.c
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Co-authored-by: Adeel Mujahid <[email protected]>
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I'm guessing some of our macOS machines don't have OpenSSL 1.1.0 on them? Looks like the 10.15 machines do, and <= 10.14 don't. |
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Note, I considered refactoring this to an AeadCommon pattern as Windows was, but left it as-is for now. The CCM, GCM, and ChaChaPoly implementations all have some notable differences. ChaChaPoly1305 uses a slightly newer API to get and set the authentication tag. CCM does not call |
src/libraries/Native/Unix/System.Security.Cryptography.Native/configure.cmake
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| if (associatedData.Length != 0) | ||
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| if (!Interop.Crypto.EvpCipherUpdate(_ctxHandle, Span<byte>.Empty, out _, associatedData)) |
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Out of morbid curiosity, what happens if multiple threads call this at the same time on the same instance? Is there a potential for buffer overrun?
(I know this is copied from the existing AEAD code, so I'm not suggesting changes at this time. Just trying to calculate risk exposure.)
src/libraries/Native/Unix/System.Security.Cryptography.Native/pal_evp_cipher.c
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...s/System.Security.Cryptography.Algorithms/src/System.Security.Cryptography.Algorithms.csproj
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...m.Security.Cryptography.Algorithms/src/System/Security/Cryptography/ChaCha20Poly1305.Unix.cs
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Contributes to #52482