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Edit File : Signature.php \| Size : 3.46 KB
<?php /** * Nexmo Client Library for PHP * * @copyright Copyright (c) 2016 Nexmo, Inc. (http://nexmo.com) * @license https://github.com/Nexmo/nexmo-php/blob/master/LICENSE.txt MIT License / namespace Nexmo\Client; use Nexmo\Client\Exception\Exception; class Signature { /* * Params to Sign * @var array / protected $params; /* * Params with Signature (and timestamp if not present) * @var array / protected $signed; /* * Create a signature from a set of parameters. * * @param array $params * @param $secret / public function __construct(array $params, $secret, $signatureMethod) { $this->params = $params; $this->signed = $params; if(!isset($this->signed['timestamp'])){ $this->signed['timestamp'] = time(); } //remove signature if present unset($this->signed['sig']); //sort params ksort($this->signed); $signed = []; foreach ($this->signed as $key => $value) { $signed[$key] = str_replace(array("&", "="), "_", $value); } //create base string $base = '&'.urldecode(http_build_query($signed)); $this->signed['sig'] = $this->sign($signatureMethod, $base, $secret); } protected function sign($signatureMethod, $data, $secret) { switch($signatureMethod) { case 'md5hash': // md5hash needs the secret appended $data .= $secret; return md5($data); break; case 'md5': case 'sha1': case 'sha256': case 'sha512': return strtoupper(hash_hmac($signatureMethod, $data, $secret)); break; default: throw new Exception('Unknown signature algorithm: '.$signatureMethod.'. Expected: md5hash, md5, sha1, sha256, or sha512'); } } /* * Get the original parameters. * * @return array / public function getParams() { return $this->params; } /* * Get the signature for the parameters. * * @return string / public function getSignature() { return $this->signed['sig']; } /* * Get a full set of parameters including the signature and timestamp. * * @return array / public function getSignedParams() { return $this->signed; } /* * Check that a signature (or set of parameters) is valid. * * First instantiate a Signature object: this will drop any supplied * signature parameter and calculate the correct one. Then call this * method and supply the signature that came in with the request. * * @param array\| string $signature The incoming sig parameter to check * (or all incoming params) * @return bool * @throws \InvalidArgumentException / public function check($signature) { if(is_array($signature) AND isset($signature['sig'])){ $signature = $signature['sig']; } if(!is_string($signature)){ throw new \InvalidArgumentException('signature must be string, or present in array or parameters'); } return strtolower($signature) == strtolower($this->signed['sig']); } /* * Allow easy comparison. * * @return string */ public function __toString() { return $this->getSignature(); } } Back

Edit File : Signature.php | Size : 3.46 KB

<?php
/**
 * Nexmo Client Library for PHP
 *
 * @copyright Copyright (c) 2016 Nexmo, Inc. (http://nexmo.com)
 * @license   https://github.com/Nexmo/nexmo-php/blob/master/LICENSE.txt MIT License
 */

namespace Nexmo\Client;

use Nexmo\Client\Exception\Exception;

class Signature
{
    /**
     * Params to Sign
     * @var array
     */
    protected $params;

/**
     * Params with Signature (and timestamp if not present)
     * @var array
     */
    protected $signed;

/**
     * Create a signature from a set of parameters.
     *
     * @param array $params
     * @param $secret
     */
    public function __construct(array $params, $secret, $signatureMethod)
    {
        $this->params = $params;
        $this->signed = $params;

if(!isset($this->signed['timestamp'])){
            $this->signed['timestamp'] = time();
        }

//remove signature if present
        unset($this->signed['sig']);

//sort params
        ksort($this->signed);

$signed = [];
        foreach ($this->signed as $key => $value) {
            $signed[$key] = str_replace(array("&", "="), "_", $value);
        }

//create base string
        $base = '&'.urldecode(http_build_query($signed));

$this->signed['sig'] = $this->sign($signatureMethod, $base, $secret);
    }

protected function sign($signatureMethod, $data, $secret) {
       switch($signatureMethod) {
            case 'md5hash':
                // md5hash needs the secret appended
                $data .= $secret;
                return md5($data);
                break;
            case 'md5':
            case 'sha1':
            case 'sha256':
            case 'sha512':
                return strtoupper(hash_hmac($signatureMethod, $data, $secret));
                break;
            default:
                throw new Exception('Unknown signature algorithm: '.$signatureMethod.'. Expected: md5hash, md5, sha1, sha256, or sha512');
        }
    }

/**
     * Get the original parameters.
     *
     * @return array
     */
    public function getParams()
    {
        return $this->params;
    }

/**
     * Get the signature for the parameters.
     *
     * @return string
     */
    public function getSignature()
    {
        return $this->signed['sig'];
    }

/**
     * Get a full set of parameters including the signature and timestamp.
     *
     * @return array
     */
    public function getSignedParams()
    {
        return $this->signed;
    }

/**
     * Check that a signature (or set of parameters) is valid.
     *
     * First instantiate a Signature object: this will drop any supplied
     * signature parameter and calculate the correct one. Then call this
     * method and supply the signature that came in with the request.
     *
     * @param array| string $signature The incoming sig parameter to check 
     *      (or all incoming params)
     * @return bool
     * @throws \InvalidArgumentException
     */
    public function check($signature)
    {
        if(is_array($signature) AND isset($signature['sig'])){
            $signature = $signature['sig'];
        }

if(!is_string($signature)){
            throw new \InvalidArgumentException('signature must be string, or present in array or parameters');
        }

return strtolower($signature) == strtolower($this->signed['sig']);
    }

/**
     * Allow easy comparison.
     * 
     * @return string
     */
    public function __toString()
    {
        return $this->getSignature();
    }
}

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