feat(db): add SSL/TLS support for PostgreSQL

Signed-off-by: Benjamin Gaussorgues <benjamin.gaussorgues@nextcloud.com>

Author: Altahrim

config/config.sample.php

@@ -2035,6 +2035,17 @@
  */
 'mysql.collation' => null,
 
+/**
+ * PostgreSQL SSL connection
+*/
+'pgsql_ssl' => [
+	'mode' => '',
+	'cert' => '',
+	'rootcert' => '',
+	'key' => '',
+	'crl' => '',
+],
+
 /**
  * Database types that are supported for installation.
  *

lib/private/DB/ConnectionFactory.php

@@ -198,6 +198,17 @@ public function createConnectionParams(string $configPrefix = '', array $additio
 			'tablePrefix' => $connectionParams['tablePrefix']
 		];
 
+		if ($type === 'pgsql') {
+			$pgsqlSsl = $this->config->getValue('pgsql_ssl', false);
+			if (is_array($pgsqlSsl)) {
+				$connectionParams['sslmode'] = $pgsqlSsl['mode'] ?? '';
+				$connectionParams['sslrootcert'] = $pgsqlSsl['rootcert'] ?? '';
+				$connectionParams['sslcert'] = $pgsqlSsl['cert'] ?? '';
+				$connectionParams['sslkey'] = $pgsqlSsl['key'] ?? '';
+				$connectionParams['sslcrl'] = $pgsqlSsl['crl'] ?? '';
+			}
+		}
+
 		if ($type === 'mysql' && $this->config->getValue('mysql.utf8mb4', false)) {
 			$connectionParams['defaultTableOptions'] = [
 				'collate' => 'utf8mb4_bin',

tests/lib/DB/ConnectionFactoryTest.php

@@ -39,4 +39,33 @@ public function testSplitHostFromPortAndSocket($host, array $expected): void {
 
 		$this->assertEquals($expected, self::invokePrivate($factory, 'splitHostFromPortAndSocket', [$host]));
 	}
+
+	public function testPgsqlSslConnection(): void {
+		/** @var SystemConfig|\PHPUnit\Framework\MockObject\MockObject $config */
+		$config = $this->createMock(SystemConfig::class);
+		$config->method('getValue')
+			->willReturnCallback(function ($key, $default) {
+				return match ($key) {
+					'dbtype' => 'pgsql',
+					'pgsql_ssl' => [
+						'mode' => 'verify-full',
+						'cert' => 'client.crt',
+						'key' => 'client.key',
+						'crl' => 'client.crl',
+						'rootcert' => 'rootCA.crt',
+					],
+					default => $default,
+				};
+			});
+		$factory = new ConnectionFactory($config);
+
+		$params = $factory->createConnectionParams();
+
+		$this->assertEquals('pdo_pgsql', $params['driver']);
+		$this->assertEquals('verify-full', $params['sslmode']);
+		$this->assertEquals('rootCA.crt', $params['sslrootcert']);
+		$this->assertEquals('client.crt', $params['sslcert']);
+		$this->assertEquals('client.key', $params['sslkey']);
+		$this->assertEquals('client.crl', $params['sslcrl']);
+	}
 }