Support for CRC-64/NVME - the default AWS S3 checksum algorithm#386
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rvagg merged 2 commits intomultiformats:masterfrom Aug 21, 2025
Merged
Support for CRC-64/NVME - the default AWS S3 checksum algorithm#386rvagg merged 2 commits intomultiformats:masterfrom
CRC-64/NVME - the default AWS S3 checksum algorithm#386rvagg merged 2 commits intomultiformats:masterfrom
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rvagg
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Aug 18, 2025
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The default checksum algorithm for new uploaded objects to AWS S3 is
CRC-64/NVME, according to their documentation: https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.htmlThe description and references below were taken from https://github.com/awesomized/crc64fast-nvme:
CRC-64/NVME comes from the NVM Express® NVM Command Set Specification (Revision 1.0d, December 2023) and has also been implemented in the Linux kernel (where it's called CRC-64/Rocksoft) and is AWS S3's recommended checksum option as CRC64-NVME. (Note that the Check value in the spec uses incorrect endianness [Section 5.2.1.3.4, Figure 120, page 83]).
Other references: