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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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6
cmd/environment.go
View File

@@ -136,13 +136,13 @@ func (env environment) LookupKMSConfig(config crypto.KMSConfig) (err error) {
if !config.Vault.IsEmpty() { // Vault and KMS master key provided
return errors.New("Ambiguous KMS configuration: vault configuration and a master key are provided at the same time")
}
globalKMSKeyID, globalKMS, err = parseKMSMasterKey(masterKey)
globalKMSKeyID, GlobalKMS, err = parseKMSMasterKey(masterKey)
if err != nil {
return err
}
}
if !config.Vault.IsEmpty() {
globalKMS, err = crypto.NewVault(config.Vault)
GlobalKMS, err = crypto.NewVault(config.Vault)
if err != nil {
return err
}
@@ -154,7 +154,7 @@ func (env environment) LookupKMSConfig(config crypto.KMSConfig) (err error) {
return err
}
globalAutoEncryption = bool(autoEncryption)
if globalAutoEncryption && globalKMS == nil { // auto-encryption enabled but no KMS
if globalAutoEncryption && GlobalKMS == nil { // auto-encryption enabled but no KMS
return errors.New("Invalid KMS configuration: auto-encryption is enabled but no valid KMS configuration is present")
}
return nil