<?php
/**
 * Copyright (C) 2015-2016 Virgil Security Inc.
 *
 * Lead Maintainer: Virgil Security Inc. <support@virgilsecurity.com>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     (1) Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *     (2) Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *     (3) Neither the name of the copyright holder nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

include_once "@PHP_MODULE_FILE_NAME@";

/**
 * @coversDefaultClass VirgilKDF
 */
class VirgilKDF_Test extends PHPUnit_Framework_TestCase {

    /**
     * @covers VirgilKDF::kdf1
     * @covers VirgilKDF::derive
     */
    public function test_kdf1() {
        $initialSequnce = "test sequnce";
        $derivedSequenceLength = 512;
        $kdf = new VirgilKDF(VirgilKDF::Algorithm_KDF1);

        $this->assertInstanceOf("VirgilKDF", $kdf);
        $this->assertEquals("KDF1", $kdf->name());

        $derivedSequence = $kdf->derive($initialSequnce, $derivedSequenceLength);

        $this->assertEquals($derivedSequenceLength, strlen($derivedSequence));
    }

    /**
     * @covers VirgilKDF::kdf2
     * @covers VirgilKDF::derive
     */
    public function test_kdf2() {
        $initialSequnce = "test sequnce";
        $derivedSequenceLength = 512;
        $kdf = new VirgilKDF(VirgilKDF::Algorithm_KDF2);

        $this->assertInstanceOf("VirgilKDF", $kdf);
        $this->assertEquals("KDF2", $kdf->name());

        $derivedSequence = $kdf->derive($initialSequnce, $derivedSequenceLength);

        $this->assertEquals($derivedSequenceLength, strlen($derivedSequence));
    }

    /**
     * @covers VirgilKDF::kdf1
     * @covers VirgilKDF::derive
     * @covers VirgilKDF::toAsn1
     * @covers VirgilKDF::fromAsn1
     */
    public function test_kdf1_asn1_compatible() {
        $this->_test_kdf_asn1_compatible(new VirgilKDF(VirgilKDF::Algorithm_KDF1));
    }

    /**
     * @covers VirgilKDF::kdf2
     * @covers VirgilKDF::derive
     * @covers VirgilKDF::toAsn1
     * @covers VirgilKDF::fromAsn1
     */
    public function test_kdf2_asn1_compatible() {
        $this->_test_kdf_asn1_compatible(new VirgilKDF(VirgilKDF::Algorithm_KDF2));
    }

    /**
     * @covers VirgilKDF::derive
     * @covers VirgilKDF::toAsn1
     * @covers VirgilKDF::fromAsn1
     */
    private function _test_kdf_asn1_compatible($kdf) {
        $initialSequnce = "test sequnce";
        $derivedSequenceLength = 512;
        // Use basic KDF
        $derivedSequence = $kdf->derive($initialSequnce, $derivedSequenceLength);
        // Save KDF
        $kdfAsn1 = $kdf->toAsn1();
        // Restore KDF
        $restoredKdf = new VirgilKdf();
        $restoredKdf->fromAsn1($kdfAsn1);
        // Check KDF names
        $this->assertEquals($kdf->name(), $restoredKdf->name());
        // Use restored KDF
        $restoredDerivedSequence = $restoredKdf->derive($initialSequnce, $derivedSequenceLength);
        $this->assertEquals($derivedSequence, $restoredDerivedSequence);
    }

}

?>