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Add double encryption at S3 gateway. (#6423)

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This PR adds pass-through, single encryption at gateway and double
encryption support (gateway encryption with pass through of SSE
headers to backend).

If KMS is set up (either with Vault as KMS or using
MINIO_SSE_MASTER_KEY),gateway will automatically perform
single encryption. If MINIO_GATEWAY_SSE is set up in addition to
Vault KMS, double encryption is performed.When neither KMS nor
MINIO_GATEWAY_SSE is set, do a pass through to backend.

When double encryption is specified, MINIO_GATEWAY_SSE can be set to
"C" for SSE-C encryption at gateway and backend, "S3" for SSE-S3
encryption at gateway/backend or both to support more than one option.

Fixes #6323, #6696
This commit is contained in:
poornas
2019-01-05 14:16:43 -08:00
committed by kannappanr
parent 2d19011a1d
commit 5a80cbec2a
59 changed files with 1902 additions and 196 deletions
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8
cmd/xl-v1-utils.go
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@@ -192,12 +192,12 @@ func parseXLErasureInfo(ctx context.Context, xlMetaBuf []byte) (ErasureInfo, err
return erasure, nil
}
func parseXLParts(xlMetaBuf []byte) []objectPartInfo {
func parseXLParts(xlMetaBuf []byte) []ObjectPartInfo {
// Parse the XL Parts.
partsResult := gjson.GetBytes(xlMetaBuf, "parts").Array()
partInfo := make([]objectPartInfo, len(partsResult))
partInfo := make([]ObjectPartInfo, len(partsResult))
for i, p := range partsResult {
info := objectPartInfo{}
info := ObjectPartInfo{}
info.Number = int(p.Get("number").Int())
info.Name = p.Get("name").String()
info.ETag = p.Get("etag").String()
@@ -249,7 +249,7 @@ func xlMetaV1UnmarshalJSON(ctx context.Context, xlMetaBuf []byte) (xlMeta xlMeta
}
// read xl.json from the given disk, parse and return xlV1MetaV1.Parts.
func readXLMetaParts(ctx context.Context, disk StorageAPI, bucket string, object string) ([]objectPartInfo, map[string]string, error) {
func readXLMetaParts(ctx context.Context, disk StorageAPI, bucket string, object string) ([]ObjectPartInfo, map[string]string, error) {
// Reads entire `xl.json`.
xlMetaBuf, err := disk.ReadAll(bucket, path.Join(object, xlMetaJSONFile))
if err != nil {