[Composer] Upgrade to phpseclib version 3

- Create custom Key file format for Salmon Magic key
- Remove obsolete pemToME and MEtoPem Crypto methods
- Remove unused newECKeypair Crypto method
- Switch to constant-time Base64 encode/decode in Base64Url Strings methods

tests/src/Protocol/SalmonTest.php

@@ -0,0 +1,105 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Test\src\Protocol;
+
+use Friendica\Protocol\Salmon;
+
+class SalmonTest extends \PHPUnit\Framework\TestCase
+{
+	public function dataMagic(): array
+	{
+		return [
+			'salmon' => [
+				'magic' => file_get_contents(__DIR__ . '/../../datasets/crypto/rsa/salmon-public-magic'),
+				'pem'   => file_get_contents(__DIR__ . '/../../datasets/crypto/rsa/salmon-public-pem'),
+			],
+		];
+	}
+
+	/**
+	 * @dataProvider dataMagic
+	 *
+	 * @param $magic
+	 * @param $pem
+	 * @return void
+	 * @throws \Exception
+	 */
+	public function testSalmonKey($magic, $pem)
+	{
+		$this->assertEquals($magic, Salmon::salmonKey($pem));
+	}
+
+	/**
+	 * @dataProvider dataMagic
+	 *
+	 * @param $magic
+	 * @param $pem
+	 * @return void
+	 */
+	public function testMagicKeyToPem($magic, $pem)
+	{
+		$this->assertEquals($pem, Salmon::magicKeyToPem($magic));
+	}
+
+	public function dataMagicFailure(): array
+	{
+		return [
+			'empty string' => [
+				'magic' => '',
+			],
+			'Missing algo' => [
+				'magic' => 'tvsoBZbLUvqWs-0d8C5hVQLjLCjjxyZb17Rm8_9FDqBYUigBSFDcJCzG27FM-zuddwpgJB0vDuPKQnt59kKRsw.AQAB',
+			],
+			'Missing modulus' => [
+				'magic' => 'RSA.AQAB',
+			],
+			'Missing exponent' => [
+				'magic' => 'RSA.tvsoBZbLUvqWs-0d8C5hVQLjLCjjxyZb17Rm8_9FDqBYUigBSFDcJCzG27FM-zuddwpgJB0vDuPKQnt59kKRsw',
+			],
+			'Missing key parts' => [
+				'magic' => 'RSA.',
+			],
+			'Too many parts' => [
+				'magic' => 'RSA.tvsoBZbLUvqWs-0d8C5hVQLjLCjjxyZb17Rm8_9FDqBYUigBSFDcJCzG27FM-zuddwpgJB0vDuPKQnt59kKRsw.AQAB.AQAB',
+			],
+			'Wrong encoding' => [
+				'magic' => 'RSA.tvsoBZbLUvqWs-0d8C5hVQLjLCjjxyZb17Rm8/9FDqBYUigBSFDcJCzG27FM+zuddwpgJB0vDuPKQnt59kKRsw.AQAB',
+			],
+			'Wrong algo' => [
+				'magic' => 'ECDSA.tvsoBZbLUvqWs-0d8C5hVQLjLCjjxyZb17Rm8_9FDqBYUigBSFDcJCzG27FM-zuddwpgJB0vDuPKQnt59kKRsw.AQAB',
+			],
+		];
+	}
+
+	/**
+	 * @dataProvider dataMagicFailure
+	 *
+	 * @param $magic
+	 * @return void
+	 */
+	public function testMagicKeyToPemFailure($magic)
+	{
+		$this->expectException(\Throwable::class);
+
+		Salmon::magicKeyToPem($magic);
+	}
+}