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@ccaffy commented on this pull request.
In src/XrdHttp/README-CKSUM.md:
> @@ -0,0 +1,15 @@ +In the case XrdHttp has been configured, it is important that the configuration contains at least one digest algorithm registered in the IANA database: https://www.iana.org/assignments/http-dig-alg/http-dig-alg.xhtml +Otherwise the user will get a 403 error for each checksum request they will do. + +Here is a table summarizing the IANA-compliant checksum names: + +| Digest algorithm | HTTP digest | Will be base64 encoded | +|------------------|-------------|------------------------| +| md5 | md5 | true | +| adler32 | adler32 | false | +| sha1 | sha | true | +| sha256 | sha-256 | true | +| sha512 | sha-512 | true | +| cksum | UNIXcksum | false |
@bbockelm thanks for your reply. What you said about the xrootd-hdfs plugins triggers some questioning on my side: I wanted to be nice with server administrator allowing them to set, for example, sha512 or sha-512 for configuring a sha-512 algorithm. This would not have worked before my modification, see this function here: https://github.com/xrootd/xrootd/blob/master/src/XrdHttp/XrdHttpReq.cc#L134
If there are other plugins that can be used to compute checksums, could my new implementation cause problems?
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