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)
}
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
}
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
}
