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File Name : OAuthServer.php

<?php

namespace Eher\OAuth;

class OAuthServer {
  protected $timestamp_threshold = 300; // in seconds, five minutes
  protected $version = '1.0';             // hi blaine
  protected $signature_methods = array();

protected $data_store;

function __construct($data_store) {
    $this->data_store = $data_store;
  }

public function add_signature_method($signature_method) {
    $this->signature_methods[$signature_method->get_name()] =
      $signature_method;
  }

// high level functions

/**
   * process a request_token request
   * returns the request token on success
   */
  public function fetch_request_token(&$request) {
    $this->get_version($request);

$consumer = $this->get_consumer($request);

// no token required for the initial token request
    $token = NULL;

$this->check_signature($request, $consumer, $token);

// Rev A change
    $callback = $request->get_parameter('oauth_callback');
    $new_token = $this->data_store->new_request_token($consumer, $callback);

return $new_token;
  }

/**
   * process an access_token request
   * returns the access token on success
   */
  public function fetch_access_token(&$request) {
    $this->get_version($request);

$consumer = $this->get_consumer($request);

// requires authorized request token
    $token = $this->get_token($request, $consumer, "request");

$this->check_signature($request, $consumer, $token);

// Rev A change
    $verifier = $request->get_parameter('oauth_verifier');
    $new_token = $this->data_store->new_access_token($token, $consumer, $verifier);

return $new_token;
  }

/**
   * verify an api call, checks all the parameters
   */
  public function verify_request(&$request) {
    $this->get_version($request);
    $consumer = $this->get_consumer($request);
    $token = $this->get_token($request, $consumer, "access");
    $this->check_signature($request, $consumer, $token);
    return array($consumer, $token);
  }

// Internals from here
  /**
   * version 1
   */
  private function get_version(&$request) {
    $version = $request->get_parameter("oauth_version");
    if (!$version) {
      // Service Providers MUST assume the protocol version to be 1.0 if this parameter is not present.
      // Chapter 7.0 ("Accessing Protected Ressources")
      $version = '1.0';
    }
    if ($version !== $this->version) {
      throw new OAuthException("OAuth version '$version' not supported");
    }
    return $version;
  }

/**
   * figure out the signature with some defaults
   */
  private function get_signature_method($request) {
    $signature_method = $request instanceof Request
        ? $request->get_parameter("oauth_signature_method")
        : NULL;

if (!$signature_method) {
      // According to chapter 7 ("Accessing Protected Ressources") the signature-method
      // parameter is required, and we can't just fallback to PLAINTEXT
      throw new OAuthException('No signature method parameter. This parameter is required');
    }

if (!in_array($signature_method,
                  array_keys($this->signature_methods))) {
      throw new OAuthException(
        "Signature method '$signature_method' not supported " .
        "try one of the following: " .
        implode(", ", array_keys($this->signature_methods))
      );
    }
    return $this->signature_methods[$signature_method];
  }

/**
   * try to find the consumer for the provided request's consumer key
   */
  private function get_consumer($request) {
    $consumer_key = $request instanceof Request
        ? $request->get_parameter("oauth_consumer_key")
        : NULL;

if (!$consumer_key) {
      throw new OAuthException("Invalid consumer key");
    }

$consumer = $this->data_store->lookup_consumer($consumer_key);
    if (!$consumer) {
      throw new OAuthException("Invalid consumer");
    }

return $consumer;
  }

/**
   * try to find the token for the provided request's token key
   */
  private function get_token($request, $consumer, $token_type="access") {
    $token_field = $request instanceof Request
         ? $request->get_parameter('oauth_token')
         : NULL;

$token = $this->data_store->lookup_token(
      $consumer, $token_type, $token_field
    );
    if (!$token) {
      throw new OAuthException("Invalid $token_type token: $token_field");
    }
    return $token;
  }

/**
   * all-in-one function to check the signature on a request
   * should guess the signature method appropriately
   */
  private function check_signature($request, $consumer, $token) {
    // this should probably be in a different method
    $timestamp = $request instanceof Request
        ? $request->get_parameter('oauth_timestamp')
        : NULL;
    $nonce = $request instanceof Request
        ? $request->get_parameter('oauth_nonce')
        : NULL;

$this->check_timestamp($timestamp);
    $this->check_nonce($consumer, $token, $nonce, $timestamp);

$signature_method = $this->get_signature_method($request);

$signature = $request->get_parameter('oauth_signature');
    $valid_sig = $signature_method->check_signature(
      $request,
      $consumer,
      $token,
      Util::urldecode_rfc3986($signature)
    );

if (!$valid_sig) {
      throw new OAuthException("Invalid signature");
    }
  }

/**
   * check that the timestamp is new enough
   */
  private function check_timestamp($timestamp) {
    if( ! $timestamp )
      throw new OAuthException(
        'Missing timestamp parameter. The parameter is required'
      );

// verify that timestamp is recentish
    $now = time();
    if (abs($now - $timestamp) > $this->timestamp_threshold) {
      throw new OAuthException(
        "Expired timestamp, yours $timestamp, ours $now"
      );
    }
  }

/**
   * check that the nonce is not repeated
   */
  private function check_nonce($consumer, $token, $nonce, $timestamp) {
    if( ! $nonce )
      throw new OAuthException(
        'Missing nonce parameter. The parameter is required'
      );

// verify that the nonce is uniqueish
    $found = $this->data_store->lookup_nonce(
      $consumer,
      $token,
      $nonce,
      $timestamp
    );
    if ($found) {
      throw new OAuthException("Nonce already used: $nonce");
    }
  }

}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	makefntq/makefntq	0755	2025-11-21 03:46:34
..	dir	-	makefntq/makefntq	0755	2025-11-21 03:46:34
.htaccess	text/plain	127 B	makefntq/makefntq	0444	2025-11-21 03:46:34
Consumer.php	text/x-php	332 B	makefntq/makefntq	0644	2016-01-26 03:14:12
HmacSha1.php	text/x-php	929 B	makefntq/makefntq	0644	2016-01-26 03:14:12
OAuthDataStore.php	text/x-php	684 B	makefntq/makefntq	0644	2016-01-26 03:14:12
OAuthException.php	text/x-php	115 B	makefntq/makefntq	0644	2016-01-26 03:14:12
OAuthServer.php	text/x-php	6.13 KB	makefntq/makefntq	0644	2016-01-26 03:14:12
PlainText.php	text/x-php	1.03 KB	makefntq/makefntq	0644	2016-01-26 03:14:12
Request.php	text/x-php	7.81 KB	makefntq/makefntq	0644	2016-01-26 03:14:12
RsaSha1.php	text/x-php	2.41 KB	makefntq/makefntq	0644	2016-01-26 03:14:12
SignatureMethod.php	text/x-php	1.03 KB	makefntq/makefntq	0644	2016-01-26 03:14:12
Token.php	text/x-php	682 B	makefntq/makefntq	0644	2016-01-26 03:14:12
Util.php	text/x-php	5.35 KB	makefntq/makefntq	0644	2016-01-26 03:14:12

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