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sse-kms: fix single-part object decryption (#12257)

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This commit fixes a bug in the single-part object decryption
that is triggered in case of SSE-KMS. Before, it was assumed
that the encryption is either SSE-C or SSE-S3. In case of SSE-KMS
the SSE-C branch was executed. This lead to an invalid SSE-C
algorithm error.

This commit fixes this by inverting the `if-else` logic.
Now, the SSE-C branch only gets executed when SSE-C headers
are present.

Signed-off-by: Andreas Auernhammer <aead@mail.de>
This commit is contained in:
Andreas Auernhammer 2021-05-07 23:40:57 +02:00 committed by GitHub
parent d09806c887
commit adaae26bbc
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1 changed files with 7 additions and 8 deletions
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15
cmd/encryption-v1.go
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@ -375,15 +375,14 @@ func decryptObjectInfo(key []byte, bucket, object string, metadata map[string]st
// DecryptRequestWithSequenceNumberR - same as
// DecryptRequestWithSequenceNumber but with a reader
func DecryptRequestWithSequenceNumberR(client io.Reader, h http.Header, bucket, object string, seqNumber uint32, metadata map[string]string) (io.Reader, error) {
if crypto.S3.IsEncrypted(metadata) {
return newDecryptReader(client, nil, bucket, object, seqNumber, metadata)
if crypto.SSEC.IsEncrypted(metadata) {
key, err := ParseSSECustomerHeader(h)
if err != nil {
return nil, err
}
return newDecryptReader(client, key, bucket, object, seqNumber, metadata)
}
key, err := ParseSSECustomerHeader(h)
if err != nil {
return nil, err
}
return newDecryptReader(client, key, bucket, object, seqNumber, metadata)
return newDecryptReader(client, nil, bucket, object, seqNumber, metadata)
}
// DecryptCopyRequestR - same as DecryptCopyRequest, but with a