authfs: rewrite with Harvey-OS/ninep, implement Rattachharveyos

1 files changed, 28 insertions, 8 deletions

diff --git a/back/auth/auth.go b/back/auth/auth.go
index 5685001..9625cc7 100644
--- a/back/auth/auth.go
+++ b/back/auth/auth.go
@@ -1,17 +1,37 @@
 package auth
 
-import "fmt"
+import (
+	"fmt"
+	"time"
+)
 
 const (
-	// Maximum number of bytes in a Username.
-	MaxUsernameSize = 64
+	// Maximum number of bytes in a username.
+	MaxUnameSize = 64
+
+	// Number of bytes in a session ID.
+	SessIdSize  = 32
+	SessTimeout = 1 * time.Hour
 )
 
-type Username string
+// User name.
+type Uname string
+
+// Session ID.
+type SessId [SessIdSize]byte
+
+func ParseUname(s string) (Uname, error) {
+	if len(s) > MaxUnameSize {
+		return "", fmt.Errorf("username longer than %d bytes: %q", MaxUnameSize, s)
+	}
+	return Uname(s), nil
+}
 
-func ValidiateUsername(s string) (Username, error) {
-	if len(s) > MaxUsernameSize {
-		return "", fmt.Errorf("username longer than %d bytes: %q", MaxUsernameSize, s)
+func ParseSessId(s string) (SessId, error) {
+	if len(s) != SessIdSize {
+		return SessId{}, fmt.Errorf("wrong session ID size: %d (want %d): %q", len(s), SessIdSize, s)
 	}
-	return Username(s), nil
+	var id SessId
+	copy(id[:], s)
+	return id, nil
 }