checking in prelim stuff

kdf/funcs.go

@@ -0,0 +1,42 @@
+package kdf
+
+import (
+	"strings"
+)
+
+/*
+	GetKDF returns a KDF from a name of the function.
+
+	KDF.Setup must be called on the resulting KDF.
+*/
+func GetKDF(name string) (k KDF, err error) {
+
+	switch strings.ToLower(name) {
+	case BcryptPbkdfName:
+		k = &BcryptPbkdf{}
+	case NullName, "":
+		k = &Null{}
+	default:
+		err = ErrUnknownKdf
+		return
+	}
+
+	return
+}
+
+/*
+	UnpackKDF returns a KDF from raw data as packed in a private key's bytes.
+
+	KDF.Setup must be called on the resulting KDF.
+
+	data can be:
+
+		- a []byte, which can be:
+			- the full private key bytes
+			- KDF section (e.g. _ref/format.ed25519 2.0 + (3.0 to 3.0.0.1) or 2.0.0 + (3.0 to 3.0.0.1))
+		- a *bytes.Buffer, which supports the same as above
+*/
+func UnpackKDF(data interface{}) (k KDF, err error) {
+
+	return
+}