Xes
73154ae174
Fuente: https://github.com/chamilo/chamilo-lms/releases/download/v1.11.40/chamilo-1.11.40.zip sha256: 1cf4bf2cc7bae1ef1a1eff643235db1d552f78ddf4b6dd1e2d2dac9868679439 Snapshot independiente (rama huerfana); diffable vs 1.11.38. vendor incluido.
56 lines
1.4 KiB
PHP
56 lines
1.4 KiB
PHP
<?php
|
|
|
|
/**
|
|
* A class for implementing a Signature Method
|
|
* See section 9 ("Signing Requests") in the spec
|
|
*/
|
|
abstract class OAuthSignatureMethod {
|
|
/**
|
|
* Needs to return the name of the Signature Method (ie HMAC-SHA1)
|
|
* @return string
|
|
*/
|
|
abstract public function get_name();
|
|
|
|
/**
|
|
* Build up the signature
|
|
* NOTE: The output of this function MUST NOT be urlencoded.
|
|
* the encoding is handled in OAuthRequest when the final
|
|
* request is serialized
|
|
* @param OAuthRequest $request
|
|
* @param OAuthConsumer $consumer
|
|
* @param OAuthToken $token
|
|
* @return string
|
|
*/
|
|
abstract public function build_signature($request, $consumer, $token);
|
|
|
|
/**
|
|
* Verifies that a given signature is correct
|
|
* @param OAuthRequest $request
|
|
* @param OAuthConsumer $consumer
|
|
* @param OAuthToken $token
|
|
* @param string $signature
|
|
* @return bool
|
|
*/
|
|
public function check_signature($request, $consumer, $token, $signature) {
|
|
$built = $this->build_signature($request, $consumer, $token);
|
|
|
|
// Check for zero length, although unlikely here
|
|
if (strlen($built) == 0 || strlen($signature) == 0) {
|
|
return false;
|
|
}
|
|
|
|
if (strlen($built) != strlen($signature)) {
|
|
return false;
|
|
}
|
|
|
|
// Avoid a timing leak with a (hopefully) time insensitive compare
|
|
$result = 0;
|
|
for ($i = 0; $i < strlen($signature); $i++) {
|
|
$result |= ord($built[$i]) ^ ord($signature[$i]);
|
|
}
|
|
|
|
return $result == 0;
|
|
}
|
|
}
|
|
|