feat: add basic local login handler in dev cli

pkg/module/auth/http/passwd/plain/hasher.go

@@ -0,0 +1,31 @@
+package plain
+
+import (
+	"crypto/subtle"
+
+	"forge.cadoles.com/arcad/edge/pkg/module/auth/http/passwd"
+)
+
+const (
+	Algo passwd.Algo = "plain"
+)
+
+func init() {
+	passwd.Register(Algo, &Hasher{})
+}
+
+type Hasher struct{}
+
+// Hash implements passwd.Hasher
+func (*Hasher) Hash(plaintext string) (string, error) {
+	return plaintext, nil
+}
+
+// Match implements passwd.Hasher.
+func (*Hasher) Match(plaintext string, hash string) (bool, error) {
+	matches := subtle.ConstantTimeCompare([]byte(plaintext), []byte(hash)) == 1
+
+	return matches, nil
+}
+
+var _ passwd.Hasher = &Hasher{}