Rewrite identity and access management

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/iam/validators.go

@@ -0,0 +1,36 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package iam
+
+import (
+	"go.probo.inc/probo/pkg/validator"
+)
+
+func PasswordValidator() validator.ValidatorFunc {
+	validators := []validator.ValidatorFunc{
+		validator.NotEmpty(),
+		validator.MaxLen(255), // Maximum length set to mitigate DDoS attacks
+		validator.MinLen(8),   // Minimum length to prevent weak passwords
+	}
+
+	return func(value any) *validator.ValidationError {
+		for _, validator := range validators {
+			if err := validator(value); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+}