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  1. JDK
  2. JDK-8143925

enhancing CounterMode.crypt() for AESCrypt.implEncryptBlock()

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    • b103
    • x86
    • generic

    Backports

      Description

        The request is to leverage the parallel nature of AES in Counter (CTR) Mode. In a single threaded implementation, this can be achieved by issuing independent x86 AES-NI instructions.
        Presently, there is an intrinsic for AESCrypt.implEncryptBlock(), which is called by CounterMode.crypt() method. However, the intrinsic works on one block at a time. The x86 AES-NI instructions have a latency of 6 or 7 clocks depending on the architecture. Since every AESENC instructions issued by this intrinsic is dependent on the earlier one, it does not take advantage of the CPU pipeline.
        We can optimize the performance of CounterMode.crypt() method by 4x-6x by issuing independent instructions from up to 6 blocks in parallel.

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8230012 enhancing CounterMode.crypt() for AESCrypt.implEncryptBlock()

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8234997 enhancing CounterMode.crypt() for AESCrypt.implEncryptBlock()

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8146581 Minor corrections to the patch submitted for earlier bug id - 8143925

            • P3 - Major loss of function.
            • Resolved

            Enhancement - null JDK-8267993 [aarch64] Implement intrinsic for CounterMode::implCrypt()

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8135250 Replace custom crypto check/range functionality with check index/range methods in java.util.Objects

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

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                mcberg Michael Berg (Inactive)
                mcberg Michael Berg (Inactive)
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