Adds validators and rack cookie helper

These changes are backported from EE, related to SAML settings in
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/4549

2 files changed, 16 insertions, 0 deletions

diff --git a/app/validators/certificate_fingerprint_validator.rb b/app/validators/certificate_fingerprint_validator.rb
new file mode 100644
index 00000000000..17df756183a
--- /dev/null
+++ b/app/validators/certificate_fingerprint_validator.rb
@@ -0,0 +1,9 @@
+class CertificateFingerprintValidator < ActiveModel::EachValidator
+  FINGERPRINT_PATTERN = /\A([a-zA-Z0-9]{2}[\s\-:]?){16,}\z/.freeze
+
+  def validate_each(record, attribute, value)
+    unless value.try(:match, FINGERPRINT_PATTERN)
+      record.errors.add(attribute, "must be a hash containing only letters, numbers, spaces, : and -")
+    end
+  end
+end
diff --git a/app/validators/top_level_group_validator.rb b/app/validators/top_level_group_validator.rb
new file mode 100644
index 00000000000..7e2e735e0cf
--- /dev/null
+++ b/app/validators/top_level_group_validator.rb
@@ -0,0 +1,7 @@
+class TopLevelGroupValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    if value&.subgroup?
+      record.errors.add(attribute, "must be a top level Group")
+    end
+  end
+end