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b2: force the case of the SHA1 to lowercase - fixes #4162

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Apparently some tools (eg duplicati) upload the SHA1 in uppercase to
b2 to be stored in the `large_file_sha1` metadata. This patch forces
it to lower case.
This commit is contained in:
Nick Craig-Wood 2020-04-24 17:22:34 +01:00
parent 54edf38d0e
commit 74d9dabdff
1 changed files with 17 additions and 6 deletions
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23
backend/b2/b2.go
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@ -1375,6 +1375,21 @@ func (o *Object) Size() int64 {
return o.size
}
// Clean the SHA1
//
// Make sure it is lower case
//
// Remove unverified prefix - see https://www.backblaze.com/b2/docs/uploading.html
// Some tools (eg Cyberduck) use this
func cleanSHA1(sha1 string) (out string) {
out = strings.ToLower(sha1)
const unverified = "unverified:"
if strings.HasPrefix(out, unverified) {
out = out[len(unverified):]
}
return out
}
// decodeMetaDataRaw sets the metadata from the data passed in
//
// Sets
@ -1390,12 +1405,7 @@ func (o *Object) decodeMetaDataRaw(ID, SHA1 string, Size int64, UploadTimestamp
if o.sha1 == "" || o.sha1 == "none" {
o.sha1 = Info[sha1Key]
}
// Remove unverified prefix - see https://www.backblaze.com/b2/docs/uploading.html
// Some tools (eg Cyberduck) use this
const unverified = "unverified:"
if strings.HasPrefix(o.sha1, unverified) {
o.sha1 = o.sha1[len(unverified):]
}
o.sha1 = cleanSHA1(o.sha1)
o.size = Size
// Use the UploadTimestamp if can't get file info
o.modTime = time.Time(UploadTimestamp)
@ -1653,6 +1663,7 @@ func (o *Object) Open(ctx context.Context, options ...fs.OpenOption) (in io.Read
o.sha1 = resp.Header.Get(sha1InfoHeader)
fs.Debugf(o, "Reading sha1 from info - %q", o.sha1)
}
o.sha1 = cleanSHA1(o.sha1)
}
// Don't check length or hash on partial content
if resp.StatusCode == http.StatusPartialContent {