function sign_rsa_sha1 in Dropbox Client 7.3

Same name and namespace in other branches

1. 7.4 oauth.php \sign_rsa_sha1()
2. 7 oauth.php \sign_rsa_sha1()
3. 7.2 oauth.php \sign_rsa_sha1()

Signs an array of oauth parameters according to the 1.0 spec using the rsa-sha1 hasing algorithm

Parameters

string $method either GET or POST:

string $baseurl the baseurl we are authenticating againts:

string $certfile the location of your private certificate file:

array $parameters all parameters that need to be signed:

Return value

string the signature

1 call to sign_rsa_sha1()

build_auth_array in ./oauth.php

Assemble an associative array with oauth values

File

./oauth.php, line 79

Code

function sign_rsa_sha1($method, $baseurl, $certfile, array $parameters) {
  $fp = fopen($certfile, "r");
  $private = fread($fp, 8192);
  fclose($fp);
  $data = $method . '&';
  $data .= urlencode($baseurl) . '&';
  $oauth = '';
  ksort($parameters);
  foreach ($parameters as $key => $value) {
    $oauth .= "&{$key}={$value}";
  }
  $data .= urlencode(substr($oauth, 1));
  $keyid = openssl_get_privatekey($private);
  openssl_sign($data, $signature, $keyid);
  openssl_free_key($keyid);
  return base64_encode($signature);
}