patch mailman to add a simple question-and-answer CAPTCHA

[ansible.git] / roles / email / files / mailman-patched / Captcha.py

diff --git a/roles/email/files/mailman-patched/Captcha.py b/roles/email/files/mailman-patched/Captcha.py
new file mode 100644 (file)
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+++ b/roles/email/files/mailman-patched/Captcha.py
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+# Copyright (C) 2018 by Ralf Jung
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+# USA.
+
+import random
+from Mailman import Utils
+
+def displayhtml(mlist, captchas):
+    """Returns a CAPTCHA question, the HTML for the answer box, and
+    the data to be put into the CSRF token"""
+    idx = random.randrange(len(captchas))
+    question = captchas[idx][0]
+    box_html = mlist.FormatBox('captcha_answer', size=30)
+    return (Utils.websafe(question), box_html, str(idx))
+
+def verify(idx, given_answer, captchas):
+    try:
+        idx = int(idx)
+    except ValueError:
+        return False
+    if not idx in range(len(captchas)):
+        return False
+    # Chec the given answer
+    correct_answers = captchas[idx][1]
+    given_answer = given_answer.strip().lower()
+    return given_answer in map(lambda x: x.strip().lower(), correct_answers)