Beispiel #1
0
func decryptConf(encryptedConf []byte) (decryptedConf []byte, err error) {
	store := &sopsyaml.Store{}
	metadata, err := store.UnmarshalMetadata(encryptedConf)
	if err != nil {
		return
	}
	key, err := metadata.GetDataKey()
	if err != nil {
		return
	}
	branch, err := store.Unmarshal(encryptedConf)
	if err != nil {
		return
	}
	tree := sops.Tree{Branch: branch, Metadata: metadata}
	cipher := aes.Cipher{}
	mac, err := tree.Decrypt(key, cipher)
	if err != nil {
		return
	}
	originalMac, err := cipher.Decrypt(
		metadata.MessageAuthenticationCode,
		key,
		[]byte(metadata.LastModified.Format(time.RFC3339)),
	)
	if originalMac != mac {
		return
	}
	return store.Marshal(tree.Branch)
}
Beispiel #2
0
func decryptFile(store sops.Store, fileBytes []byte, ignoreMac bool) (sops.Tree, error) {
	var tree sops.Tree
	metadata, err := store.UnmarshalMetadata(fileBytes)
	if err != nil {
		return tree, cli.NewExitError(fmt.Sprintf("Error loading file: %s", err), exitCouldNotReadInputFile)
	}
	key, err := metadata.GetDataKey()
	if err != nil {
		return tree, cli.NewExitError(err.Error(), exitCouldNotRetrieveKey)
	}
	branch, err := store.Unmarshal(fileBytes)
	if err != nil {
		return tree, cli.NewExitError(fmt.Sprintf("Error loading file: %s", err), exitCouldNotReadInputFile)
	}
	tree = sops.Tree{Branch: branch, Metadata: metadata}
	cipher := aes.Cipher{}
	mac, err := tree.Decrypt(key, cipher)
	if err != nil {
		return tree, cli.NewExitError(fmt.Sprintf("Error decrypting tree: %s", err), exitErrorDecryptingTree)
	}
	originalMac, err := cipher.Decrypt(metadata.MessageAuthenticationCode, key, []byte(metadata.LastModified.Format(time.RFC3339)))
	if originalMac != mac && !ignoreMac {
		return tree, cli.NewExitError(fmt.Sprintf("MAC mismatch. File has %s, computed %s", originalMac, mac), 9)
	}
	return tree, nil
}
Beispiel #3
0
func decryptTree(tree sops.Tree, ignoreMac bool) (sops.Tree, map[string][]interface{}, error) {
	cipher := aes.Cipher{}
	stash := make(map[string][]interface{})
	key, err := tree.Metadata.GetDataKey()
	if err != nil {
		return tree, nil, cli.NewExitError(err.Error(), exitCouldNotRetrieveKey)
	}
	computedMac, err := tree.Decrypt(key, cipher, stash)
	if err != nil {
		return tree, nil, cli.NewExitError(fmt.Sprintf("Error decrypting tree: %s", err), exitErrorDecryptingTree)
	}
	fileMac, _, err := cipher.Decrypt(tree.Metadata.MessageAuthenticationCode, key, tree.Metadata.LastModified.Format(time.RFC3339))
	if fileMac != computedMac && !ignoreMac {
		return tree, nil, cli.NewExitError(fmt.Sprintf("MAC mismatch. File has %s, computed %s", fileMac, computedMac), exitMacMismatch)
	}
	return tree, stash, nil
}