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Charles-Antoine Mathieu
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Oct 23, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package s3 | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
|
|
||
| "github.com/minio/minio-go/v7/pkg/encrypt" | ||
|
|
||
| "github.com/root-gg/plik/server/common" | ||
| ) | ||
|
|
||
| // Build Server Side Encryption configuration | ||
| func (b *Backend) getServerSideEncryption(file *common.File) (sse encrypt.ServerSide, err error) { | ||
| switch encrypt.Type(b.config.SSE) { | ||
| case "": | ||
| return nil, nil | ||
| case encrypt.S3: | ||
| return encrypt.NewSSE(), nil | ||
| case encrypt.SSEC: | ||
| key, err := getServerSideEncryptionKey(file) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to get Server Side Encryption Key : %s", err) | ||
| } | ||
| return encrypt.NewSSEC([]byte(key)) | ||
| case encrypt.KMS: | ||
| return nil, fmt.Errorf("KMS server side encryption is not yet implemented") | ||
| default: | ||
| return nil, fmt.Errorf("invalid SSE type %s", b.config.SSE) | ||
| } | ||
| } | ||
|
|
||
| // Generate a 32Bytes / 256bits encryption key | ||
| func genServerSideEncryptionKey() string { | ||
| return common.GenerateRandomID(32) | ||
| } | ||
|
|
||
| // Get the SSE Key from the file backend details or generate one and store it in the file backend details | ||
| func getServerSideEncryptionKey(file *common.File) (key string, err error) { | ||
| // Retrieve the SSE Key from the backend details | ||
| if file.BackendDetails != "" { | ||
| backendDetails := &BackendDetails{} | ||
| err = json.Unmarshal([]byte(file.BackendDetails), backendDetails) | ||
| if err != nil { | ||
| return "", fmt.Errorf("unable to deserialize backend details : %s", err) | ||
| } | ||
|
|
||
| if backendDetails.SSEKey != "" { | ||
| return backendDetails.SSEKey, nil | ||
| } | ||
| } | ||
|
|
||
| key = genServerSideEncryptionKey() | ||
|
|
||
| // Store the SSE Key in the backend details | ||
| err = setServerSideEncryptionKey(file, key) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| return key, nil | ||
| } | ||
|
|
||
| // Add the SSE Key to the file backend details | ||
| func setServerSideEncryptionKey(file *common.File, key string) (err error) { | ||
| backendDetails := &BackendDetails{} | ||
|
|
||
| if file.BackendDetails != "" { | ||
| err = json.Unmarshal([]byte(file.BackendDetails), backendDetails) | ||
| if err != nil { | ||
| return fmt.Errorf("unable to deserialize backend details : %s", err) | ||
| } | ||
| } | ||
|
|
||
| backendDetails.SSEKey = key | ||
|
|
||
| backendDetailsJSON, err := json.Marshal(backendDetails) | ||
| if err != nil { | ||
| return fmt.Errorf("unable to serialize backend details : %s", err) | ||
| } | ||
|
|
||
| file.BackendDetails = string(backendDetailsJSON) | ||
| return nil | ||
| } |
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