Custom keyfile (#470)

* add stable sort to helm dependencies

* Add ability to specify custom keyfiles

Can be useful for people who want to enable repo specific encryption or other patterns

pkg/crypto/age.go

@@ -56,7 +56,6 @@ func (prov *AgeProvider) Marshall() ([]byte, error) {
 		Version: "crypto.plural.sh/v1",
 		Type:    AGE,
 		Id:      prov.ID(),
-		Context: map[string]interface{}{},
 	}
 
 	return yaml.Marshal(conf)

pkg/crypto/config.go

@@ -13,7 +13,15 @@ type Config struct {
 	Version string
 	Type    IdentityType
 	Id      string
-	Context map[string]interface{}
+	Context *Context
+}
+
+type Context struct {
+	Key *KeyConfig `yaml:"key" json:"key"`
+}
+
+type KeyConfig struct {
+	File string
 }
 
 func configPath() string {

pkg/crypto/key.go

@@ -10,6 +10,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/mitchellh/go-homedir"
 	"github.com/pluralsh/plural/pkg/utils"
 	"github.com/pluralsh/plural/pkg/utils/pathing"
 	"gopkg.in/yaml.v2"
@@ -39,13 +40,20 @@ func (prov *KeyProvider) Marshall() ([]byte, error) {
 		Version: "crypto.plural.sh/v1",
 		Type:    KEY,
 		Id:      prov.ID(),
-		Context: map[string]interface{}{},
 	}
 
 	return yaml.Marshal(conf)
 }
 
 func buildKeyProvider(conf *Config, key *AESKey) (prov *KeyProvider, err error) {
+	if conf.Context != nil && conf.Context.Key != nil {
+		if file, err := homedir.Expand(conf.Context.Key.File); err == nil {
+			if k, err := Read(file); err == nil {
+				key = k
+			}
+		}
+	}
+
 	prov = &KeyProvider{key: key.Key}
 	if prov.ID() != conf.Id {
 		err = fmt.Errorf("the key fingerprints failed to match")