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8283022: com/sun/crypto/provider/Cipher/AEAD/GCMBufferTest.java failing with -Xcomp after 8273297 #8280
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👋 Welcome back svkamath! A progress list of the required criteria for merging this PR into |
@smita-kamath The following label will be automatically applied to this pull request:
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It's good that this issue has been found. There seems to be an intrinsic for aarch64 with a vectorized GCM implementation, I guess is must also work in multiples of 768 bytes, so is this change okay there too? |
@smita-kamath This change now passes all automated pre-integration checks. ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details. After integration, the commit message for the final commit will be:
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x86-64 only uses this intrinsic, aarch64 does not support this intrinsic and uses the java code. |
It looks like aarch64 has an implementation of generate_galoisCounterMode_AESCrypt, isn't that the code that implGCMCrypt0 runs? |
Oh wow.. you're right. I never saw that come through.. thanks for seeing that. I'll run some tests that it's ok. |
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Please update the copyright year
I reran the test on aarch64 and x64 using -Xcomp without failure, also repeating the failing test. Given the bug says it was intermittent I can never been 100% certain it is perfect, but looking at the aarch64, it is just looping on that data it is presented, not hardcoded for a particular amount of data like the x64 code. That looping should work fine with the code change. |
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I'm not sure if the last commit removed the approval or not.. so i'll approve again
/integrate |
@smita-kamath |
/sponsor |
Going to push as commit 3416bfa.
Your commit was automatically rebased without conflicts. |
@ascarpino @smita-kamath Pushed as commit 3416bfa. 💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored. |
When input length provided to the intrinsic is 8192, only 7680 bytes are processed as the intrinsic operates on multiples of 768 bytes.
In implGCMCrypt(ByteBuffer src, ByteBuffer dst) method,
dst.put(bout, 0, PARALLEL_LEN) statement caused the ciphertext mismatch as PARALLEL_LEN was set to 8192.
Since the intrinsic only processed 7680 bytes, the rest output was incorrect.
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