update format spec, working on better structs

sshkeys/const.go

@@ -5,8 +5,18 @@ const (
 	KeyV1Magic string = "openssh-key-v1"
 )
 
-// Key cipher names.
+// Cipher names. I believe only AES256-CTR is supported upstream currently.
 const (
-	CipherED25519 = iota
-	CipherRSA     = iota
+	CIPHER_AES256_CTR = "aes256-ctr"
+)
+
+// Key types.
+const (
+	KEY_ED25519 string = "ssh-ed25519"
+	KEY_RSA     string = "ssh-rsa"
+)
+
+// KDF names. I believe only bcrypt is supported upstream currently.
+const (
+	KDF_BCRYPT string = "bcrypt"
 )