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I study the KMIP in OASIS standard, I need some help. Integers, Enumerations, and Intervals in KMIP length shall be padded with four bytes. the reason for padding in kmip is need to match the right size??

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The padding in KMIP is present only when data is converted to TTLV format, which is a binary representation of KMIP data. TTLV padding exists to "provide optimal alignment for both 32-bit and 64-bit processors" according to the kmip specification. It's generally easier for a CPU to load memory when it's aligned to certain byte widths, especially when the CPU is doing work in parallel.

see section 9 in the kmip 1.0 spec: https://docs.oasis-open.org/kmip/spec/v1.0/os/kmip-spec-1.0-os.html#_Toc262581260

wikipedia describes how "there can be substantial performance advantages from using aligned data" on x86 cpus: https://en.wikipedia.org/wiki/Data_structure_alignment

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  • $\begingroup$ Thank you for best answer to me. I also learn about the Data Structure Alignment for you. Thanks $\endgroup$ – 신동평 Mar 2 '17 at 5:22
  • $\begingroup$ Dear fafrd, Unfortunately I have a another Question. so.. Would it be possible for you provide me with your E-Mail? please.. Thanks. $\endgroup$ – 신동평 Mar 9 '17 at 2:33

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