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Use regex to check for prompt injection attempts. First code with uni…
…t tests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| <?php | ||
| // This file is part of Moodle - http://moodle.org/ | ||
| // | ||
| // Moodle 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 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>. | ||
|
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| namespace qtype_aitext; | ||
|
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| /** | ||
| * Class logging | ||
| * | ||
| * @package qtype_aitext | ||
| * @copyright 2025 Marcus Green | ||
| * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
| */ | ||
| class log { | ||
| public function insert(int $aitextid, string $prompt) :bool { | ||
| global $DB, $USER; | ||
| if(get_config('qtype_aitext', 'logallprompts') == '1') { | ||
| $record = new \stdClass(); | ||
| $record->aitext = $aitextid; | ||
| $record->userid = $USER->id; | ||
| $record->prompt = $prompt; | ||
| $record->pattern = ''; | ||
| $record->timeupdated = time(); | ||
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| $DB->insert_record('qtype_aitext_log', $record); | ||
| return true; | ||
| } | ||
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| if(get_config('qtype_aitext', 'regularexpressions') == '1') { | ||
| $patterns = explode("\n", get_config('qtype_aitext', 'injectionprompts')); | ||
| foreach ($patterns as $pattern) { | ||
| if (preg_match($pattern, $prompt)) { | ||
| // Typically a prompt injection attempt. | ||
| $record = new \stdClass(); | ||
| $record->aitext = $aitextid; | ||
| $record->userid = $USER->id; | ||
| $record->prompt = $prompt; | ||
| $record->pattern = $pattern; | ||
| $record->timeupdated = time(); | ||
| $DB->insert_record('qtype_aitext_log', $record); | ||
| return true; | ||
| } | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| <?php | ||
| // This file is part of Moodle - http://moodle.org/ | ||
| // | ||
| // Moodle 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 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
|
|
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| /** | ||
| * Tests for AI Text | ||
| * | ||
| * @package qtype_aitext | ||
| * @category test | ||
| * @copyright 2025 Marcus Green | ||
| * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | ||
| */ | ||
|
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| namespace qtype_aitext; | ||
| use qtype_aitext; | ||
| use qtype_aitext_test_helper; | ||
|
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| defined('MOODLE_INTERNAL') || die(); | ||
| global $CFG; | ||
| require_once($CFG->dirroot . '/question/engine/tests/helpers.php'); | ||
| require_once($CFG->dirroot . '/question/type/aitext/tests/helper.php'); | ||
| require_once($CFG->dirroot . '/question/type/aitext/questiontype.php'); | ||
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| class log_test extends \advanced_testcase { | ||
| /** | ||
| * Always aitext | ||
| * | ||
| * @var mixed | ||
| */ | ||
| protected $question; | ||
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| protected function setUp(): void { | ||
| parent::setUp(); | ||
| // $this->qtype->id = rand(100, 1000); | ||
| $this->question = qtype_aitext_test_helper::make_aitext_question([]); | ||
| $this->setAdminUser(); | ||
| } | ||
|
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| public function test_insert_all_prompts() { | ||
| global $DB; | ||
| $this->resetAfterTest(true); | ||
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| // Set config for logging all prompts | ||
| set_config('logallprompts', '1', 'qtype_aitext'); | ||
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| $log = new log(); | ||
| $prompt = "Test prompt text"; | ||
|
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| // Test the insert | ||
| $result = $log->insert($this->question->id,$prompt); | ||
|
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| // // Assert the result is true | ||
| $this->assertTrue($result); | ||
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| // // Verify the database record | ||
| $records = $DB->get_records('qtype_aitext_log'); | ||
| $this->assertCount(1, $records); | ||
| } | ||
|
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| public function test_insert_injection_detection() { | ||
| global $DB; | ||
| $this->resetAfterTest(true); | ||
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| // Set config for regular expressions | ||
| set_config('regularexpressions', '1', 'qtype_aitext'); | ||
| set_config('injectionprompts', '/malicious|hack/', 'qtype_aitext'); | ||
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| $log = new log(); | ||
| $prompt = "This is a malicious prompt"; | ||
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| // Test the insert | ||
| $result = $log->insert($this->question->id,$prompt); | ||
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| // Assert the result is true | ||
| $this->assertTrue($result); | ||
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| // Verify the database record | ||
| $records = $DB->get_records('qtype_aitext_log'); | ||
| $this->assertCount(1, $records); | ||
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| // $record = reset($records); | ||
| // $this->assertEquals($prompt, $record->prompt); | ||
| // $this->assertEquals('/malicious|hack/', $record->pattern); | ||
| } | ||
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| public function test_insert_no_logging() { | ||
| global $DB; | ||
| $this->resetAfterTest(true); | ||
|
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| // Ensure both logging options are disabled | ||
| set_config('logallprompts', '0', 'qtype_aitext'); | ||
| set_config('regularexpressions', '0', 'qtype_aitext'); | ||
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| $log = new log(); | ||
| $prompt = "Normal prompt text"; | ||
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| // Test the insert | ||
| $result = $log->insert($this->question->id,$prompt); | ||
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| // Assert the result is false | ||
| $this->assertFalse($result); | ||
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| // Verify no records were created | ||
| $records = $DB->get_records('qtype_aitext_log'); | ||
| $this->assertCount(0, $records); | ||
| } | ||
| } |
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