<?php
/*
 * Copyright (c) 2018 Hubzilla
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

namespace Zotlabs\Tests\Unit\Web;

use phpmock\phpunit\PHPMock;
use Zotlabs\Tests\Unit\UnitTestCase;

use Zotlabs\Web\HTTPSig;

/**
 * @brief Unit Test case for HTTPSig class.
 *
 * @covers Zotlabs\Web\HTTPSig
 */
class PermissionDescriptionTest extends UnitTestCase {

	use PHPMock;

	/**
	 * @dataProvider generate_digestProvider
	 */
	function testGenerate_digest($text, $digest) {
		$this->assertSame(
				$digest,
				HTTPSig::generate_digest($text, false)
		);
	}
	public function generate_digestProvider() {
		return [
				'empty body text' => [
						'',
						'47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU='
				],
				'sample body text' => [
						'body text',
						'2fu8kUkvuzuo5XyhWwORNOcJgDColXgxWkw1T5EXzPI='
				],
				'NULL body text' => [
						null,
						'47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU='
				],
		];
	}

	function testGeneratedDigestsOfDifferentTextShouldNotBeEqual() {
		$this->assertNotSame(
				HTTPSig::generate_digest('text1', false),
				HTTPSig::generate_digest('text2', false)
		);
	}

	/**
	 * Process separation needed for header() check.
	 * @runInSeparateProcess
	 */
	function testGenerate_digestSendsHttpHeader() {
		$ret = HTTPSig::generate_digest('body text', true);

		$this->assertSame('2fu8kUkvuzuo5XyhWwORNOcJgDColXgxWkw1T5EXzPI=', $ret);
		$this->assertContains(
				'Digest: SHA-256=2fu8kUkvuzuo5XyhWwORNOcJgDColXgxWkw1T5EXzPI=',
				xdebug_get_headers(),
				'HTTP header Digest does not match'
		);
	}

	/**
	 * @uses ::crypto_unencapsulate
	 */
	function testDecrypt_sigheader() {
		$header = 'Header: iv="value_iv" key="value_key" alg="value_alg" data="value_data"';
		$result = [
				'iv' => 'value_iv',
				'key' => 'value_key',
				'alg' => 'value_alg',
				'data' => 'value_data'
		];

		$this->assertSame($result, HTTPSig::decrypt_sigheader($header, 'site private key'));
	}
	/**
	 * @uses ::crypto_unencapsulate
	 */
	function testDecrypt_sigheaderUseSitePrivateKey() {
		// Create a stub for global function get_config() with expectation
		$t = $this->getFunctionMock('Zotlabs\Web', 'get_config');
		$t->expects($this->once())->willReturn('system.prvkey');

		$header = 'Header: iv="value_iv" key="value_key" alg="value_alg" data="value_data"';
		$result = [
				'iv' => 'value_iv',
				'key' => 'value_key',
				'alg' => 'value_alg',
				'data' => 'value_data'
		];

		$this->assertSame($result, HTTPSig::decrypt_sigheader($header));
	}
	function testDecrypt_sigheaderIncompleteHeaderShouldReturnEmptyString() {
		$header = 'Header: iv="value_iv" key="value_key"';

		$this->assertEmpty(HTTPSig::decrypt_sigheader($header, 'site private key'));
	}
}