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authorEugen Rochko <eugen@zeonfederated.com>2021-04-17 03:14:25 +0200
committerGitHub <noreply@github.com>2021-04-17 03:14:25 +0200
commitb3ceb3dcc4df62803aa967d7aecee686973a8996 (patch)
treedc34486813237852b90cc81b26c4e361323c7757 /app/helpers
parent170e05db127c9f357183239a5543bdfc9525680d (diff)
Add canonical e-mail blocks for suspended accounts (#16049)
Prevent new accounts from being created using the same underlying
e-mail as a suspended account using extensions and period
permutations. Stores e-mails as a SHA256 hash
Diffstat (limited to 'app/helpers')
-rw-r--r--app/helpers/email_helper.rb18
1 files changed, 18 insertions, 0 deletions
diff --git a/app/helpers/email_helper.rb b/app/helpers/email_helper.rb
new file mode 100644
index 000000000..360783c62
--- /dev/null
+++ b/app/helpers/email_helper.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module EmailHelper
+  def self.included(base)
+    base.extend(self)
+  end
+
+  def email_to_canonical_email(str)
+    username, domain = str.downcase.split('@', 2)
+    username, = username.gsub('.', '').split('+', 2)
+
+    "#{username}@#{domain}"
+  end
+
+  def email_to_canonical_email_hash(str)
+    Digest::SHA2.new(256).hexdigest(email_to_canonical_email(str))
+  end
+end