In case it helps, https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html#large-object-checksums seems to document the algorithm. I'd had some similar issues to the OP a while ago and did some testing that indicated the documentation was accurate, but haven't checked recently.
On Friday, June 16, 2023 at 5:29:46 AM UTC-4 Nikolaus Rath wrote: > Hi, > > I'm skeptical that this is a future proof solution, since > https://docs.aws.amazon.com/AmazonS3/latest/API/API_Object.html > just says that "If an object is created by either the Multipart > Upload or Part Copy operation, the ETag is not an MD5 digest, regardless > of the method of encryption.". If there is no documentation from AWS > about how to compute the ETag for these cases, we should not attempt to > do so. > > > Best, > -Nikolaus > > On Jun 15 2023, Peter Marshall <[email protected]> wrote: > > I found this info on how to calculate Etags on a local file: > > > > https://teppen.io/2018/06/23/aws_s3_etags/ and the linked > > https://teppen.io/2018/10/23/aws_s3_verify_etags/ > > > > -- > > You received this message because you are subscribed to the Google > Groups "s3ql" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/s3ql/ce3756b1-79f3-4adf-0912-baadf8103a61%40goteck.co.uk > . > -- You received this message because you are subscribed to the Google Groups "s3ql" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/s3ql/53689c84-5e86-47b4-911e-11583c084c42n%40googlegroups.com.
