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crypto: add support for parsing/creating SSE-C/SSE-S3 metadata (#6169)

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* crypto: add support for parsing SSE-C/SSE-S3 metadata

This commit adds support for detecting and parsing
SSE-C/SSE-S3 object metadata. With the `IsEncrypted`
functions it is possible to determine whether an object
seems to be encrypted. With the `ParseMetadata` functions
it is possible to validate such metadata and extract the
SSE-C/SSE-S3 related values.

It also fixes some naming issues.

* crypto: add functions for creating SSE object metadata

This commit adds functions for creating SSE-S3 and
SSE-C metadata. It also adds a `CreateMultipartMetadata`
for creating multipart metadata.

For all functions unit tests are included.
This commit is contained in:
Andreas Auernhammer
2018-07-25 22:35:54 +02:00
committed by Harshavardhana
parent 2debe77586
commit 644c2ce326
8 changed files with 607 additions and 21 deletions
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8
cmd/crypto/error.go
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@@ -49,6 +49,14 @@ var (
ErrCustomerKeyMD5Mismatch = errors.New("The provided SSE-C key MD5 does not match the computed MD5 of the SSE-C key")
)
var (
errMissingInternalIV = Error{"The object metadata is missing the internal encryption IV"}
errMissingInternalSealAlgorithm = Error{"The object metadata is missing the internal seal algorithm"}
errInvalidInternalIV = Error{"The internal encryption IV is malformed"}
errInvalidInternalSealAlgorithm = Error{"The internal seal algorithm is invalid and not supported"}
)
var (
// errOutOfEntropy indicates that the a source of randomness (PRNG) wasn't able
// to produce enough random data. This is fatal error and should cause a panic.