Proyectos de Subversion Moodle

<?php

namespace Packback\Lti1p3;

/**

 * Used for migrations from LTI 1.1 to LTI 1.3

 *

 * @see IMigrationDatabase

 */

class Lti1p1Key

{

    private ?string $key;

    private ?string $secret;

    public function __construct(?array $key = null)

    {

        $this->key = $key['key'] ?? null;

        $this->secret = $key['secret'] ?? null;

    }

    public function getKey(): ?string

    {

        return $this->key;

    }

    public function setKey(string $key): self

    {

        $this->key = $key;

        return $this;

    }

    public function getSecret(): ?string

    {

        return $this->secret;

    }

    public function setSecret(string $secret): self

    {

        $this->secret = $secret;

        return $this;

    }

    /**

     * Create a signature using the key and secret

     *

     * @see https://www.imsglobal.org/spec/lti/v1p3/migr#oauth_consumer_key_sign

     */

    public function sign(string $deploymentId, string $iss, string $clientId, string $exp, string $nonce): string

    {

        $signatureComponents = [

            $this->getKey(),

            $deploymentId,

            $iss,

            $clientId,

            $exp,

            $nonce,

        ];

        $baseString = implode('&', $signatureComponents);

        $utf8String = mb_convert_encoding($baseString, 'utf8', mb_detect_encoding($baseString));

        $hash = hash_hmac('sha256', $utf8String, $this->getSecret(), true);

        return base64_encode($hash);

    }

}