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127 lines
3.9 KiB
Go
127 lines
3.9 KiB
Go
//go:build !plan9 && !solaris && !js
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package oracleobjectstorage
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import (
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"crypto/sha256"
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"encoding/base64"
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"errors"
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"fmt"
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"os"
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"strings"
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"github.com/oracle/oci-go-sdk/v65/common"
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"github.com/oracle/oci-go-sdk/v65/objectstorage"
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)
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const (
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sseDefaultAlgorithm = "AES256"
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)
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func getSha256(p []byte) []byte {
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h := sha256.New()
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h.Write(p)
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return h.Sum(nil)
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}
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func validateSSECustomerKeyOptions(opt *Options) error {
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if opt.SSEKMSKeyID != "" && (opt.SSECustomerKeyFile != "" || opt.SSECustomerKey != "") {
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return errors.New("oos: can't use vault sse_kms_key_id and local sse_customer_key at the same time")
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}
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if opt.SSECustomerKey != "" && opt.SSECustomerKeyFile != "" {
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return errors.New("oos: can't use sse_customer_key and sse_customer_key_file at the same time")
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}
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if opt.SSEKMSKeyID != "" {
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return nil
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}
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err := populateSSECustomerKeys(opt)
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if err != nil {
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return err
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}
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return nil
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}
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func populateSSECustomerKeys(opt *Options) error {
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if opt.SSECustomerKeyFile != "" {
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// Reads the base64-encoded AES key data from the specified file and computes its SHA256 checksum
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data, err := os.ReadFile(expandPath(opt.SSECustomerKeyFile))
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if err != nil {
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return fmt.Errorf("oos: error reading sse_customer_key_file: %v", err)
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}
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opt.SSECustomerKey = strings.TrimSpace(string(data))
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}
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if opt.SSECustomerKey != "" {
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decoded, err := base64.StdEncoding.DecodeString(opt.SSECustomerKey)
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if err != nil {
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return fmt.Errorf("oos: Could not decode sse_customer_key_file: %w", err)
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}
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sha256Checksum := base64.StdEncoding.EncodeToString(getSha256(decoded))
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if opt.SSECustomerKeySha256 == "" {
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opt.SSECustomerKeySha256 = sha256Checksum
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} else if opt.SSECustomerKeySha256 != sha256Checksum {
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return fmt.Errorf("the computed SHA256 checksum "+
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"(%v) of the key doesn't match the config entry sse_customer_key_sha256=(%v)",
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sha256Checksum, opt.SSECustomerKeySha256)
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}
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if opt.SSECustomerAlgorithm == "" {
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opt.SSECustomerAlgorithm = sseDefaultAlgorithm
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}
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}
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return nil
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}
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// https://docs.oracle.com/en-us/iaas/Content/Object/Tasks/usingyourencryptionkeys.htm
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func useBYOKPutObject(fs *Fs, request *objectstorage.PutObjectRequest) {
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if fs.opt.SSEKMSKeyID != "" {
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request.OpcSseKmsKeyId = common.String(fs.opt.SSEKMSKeyID)
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}
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if fs.opt.SSECustomerAlgorithm != "" {
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request.OpcSseCustomerAlgorithm = common.String(fs.opt.SSECustomerAlgorithm)
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}
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if fs.opt.SSECustomerKey != "" {
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request.OpcSseCustomerKey = common.String(fs.opt.SSECustomerKey)
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}
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if fs.opt.SSECustomerKeySha256 != "" {
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request.OpcSseCustomerKeySha256 = common.String(fs.opt.SSECustomerKeySha256)
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}
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}
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func useBYOKHeadObject(fs *Fs, request *objectstorage.HeadObjectRequest) {
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if fs.opt.SSECustomerAlgorithm != "" {
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request.OpcSseCustomerAlgorithm = common.String(fs.opt.SSECustomerAlgorithm)
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}
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if fs.opt.SSECustomerKey != "" {
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request.OpcSseCustomerKey = common.String(fs.opt.SSECustomerKey)
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}
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if fs.opt.SSECustomerKeySha256 != "" {
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request.OpcSseCustomerKeySha256 = common.String(fs.opt.SSECustomerKeySha256)
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}
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}
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func useBYOKGetObject(fs *Fs, request *objectstorage.GetObjectRequest) {
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if fs.opt.SSECustomerAlgorithm != "" {
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request.OpcSseCustomerAlgorithm = common.String(fs.opt.SSECustomerAlgorithm)
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}
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if fs.opt.SSECustomerKey != "" {
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request.OpcSseCustomerKey = common.String(fs.opt.SSECustomerKey)
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}
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if fs.opt.SSECustomerKeySha256 != "" {
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request.OpcSseCustomerKeySha256 = common.String(fs.opt.SSECustomerKeySha256)
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}
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}
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func useBYOKCopyObject(fs *Fs, request *objectstorage.CopyObjectRequest) {
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if fs.opt.SSEKMSKeyID != "" {
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request.OpcSseKmsKeyId = common.String(fs.opt.SSEKMSKeyID)
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}
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if fs.opt.SSECustomerAlgorithm != "" {
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request.OpcSseCustomerAlgorithm = common.String(fs.opt.SSECustomerAlgorithm)
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}
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if fs.opt.SSECustomerKey != "" {
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request.OpcSseCustomerKey = common.String(fs.opt.SSECustomerKey)
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}
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if fs.opt.SSECustomerKeySha256 != "" {
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request.OpcSseCustomerKeySha256 = common.String(fs.opt.SSECustomerKeySha256)
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}
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}
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