checking in for the night.

key generation should be done, need to finish packing/formatting.

also need to start on moduli generation.

sshkeys/ed25519.go

@@ -0,0 +1,24 @@
+package sshkeys
+
+import (
+	"crypto/ed25519"
+)
+
+func (k *SSHPrivKey) generateEd25519() error {
+	if k.Key != nil || k.PublicKey.Key != nil {
+		return nil // Just no-op; already generated.
+	}
+	// We cast "pk" (public key) to _ because it's an interface{} that we can't seem to
+	// assert to []byte. I've tried iterating, a type assertion, initializing,... nada.
+	// Luckily it's at a fixed half of the secret key.
+	if _, s, err := ed25519.GenerateKey(nil); err != nil {
+		return err
+	} else {
+		k.Key = s
+		ks := len(s) - ed25519.PublicKeySize
+		k.PublicKey.Key = s[ks:]
+		k.BitSize = ed25519Len
+		k.PublicKey.KeyType = KeyEd25519
+	}
+	return nil
+}