chore: initial commit

internal/svc/auth/hashing.go

@@ -0,0 +1,40 @@
+// Copyright (C) 2024 Declan Teevan
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package auth
+
+import (
+	"golang.org/x/crypto/bcrypt"
+)
+
+func HashPassword(password string) (string, error) {
+	// bcrypt has a 72 byte limitation on password length
+	// passwords are already validated to ensure no greater than 64 chars
+	hashedPasswordB, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return "", err
+	}
+
+	return string(hashedPasswordB), nil
+}
+
+func CompareHashAndPassword(password string, hashedPassword string) bool {
+	err := bcrypt.CompareHashAndPassword([]byte(hashedPassword), []byte(password))
+	if err != nil {
+		return false
+	}
+
+	return true
+}