fileapi/drivers/s3.driver

<?php

/**
 * @file
 * Amazon S3 storage driver for filesystem.
 */


/**
 * driver settings form. called by filesystem.module when creating a respository using this driver.
 * @param $settings
 *  settings array from database.
 */

function fileapi_driver_s3_settings_form($settings = array()) {
  //debug_msg($settings);
  $form = array(
    '#type' => 'fieldset',
    '#title' => t('Amazon S3 storage driver settings'),
    '#tree' => TRUE,
  );

  $form['driver'] = array(
    '#type' => 'hidden',
    '#value' => 's3',
  );

  $form['s3 url'] = array(
    '#type' => 'textfield',
    '#title' => t('Amazon S3 url'),
    '#default_value' => strlen($settings['s3 url']) ? $settings['s3 url'] : 'http://s3.amazonaws.com',
  );

  $form['awsID'] = array(
    '#type' => 'textfield',
    '#title' => t('AWS Access Key ID'),
    '#default_value' => $settings['awsID'],
  );

  $form['awsSecret'] = array(
    '#type' => 'textfield',
    '#title' => t('AWS Secret'),
    '#default_value' => $settings['awsSecret'],
  );

  return $form;
} 

function fileapi_driver_s3_settings_form_validate() {
}


/** 
 * test if a path is a file.
 * @param $path
 *   path to be tested
 */
function fileapi_driver_s3_is_file($settings, $path) {
  
}

/** 
 * test if a path is a directory.
 * @param $path
 *   path to be tested
 */
function fileapi_driver_s3_is_dir($settings, $path) {
}


/**
 * create a directory using standard php functions
 * @param $path
 */
function fileapi_driver_s3_mkdir($settings, $path) {
}

/**
 * remove a directory using standard php functions
 * @param $path
 */

function fileapi_driver_s3_rmdir($settings, $path) {
}


/**
 * remove a file using standard php functions
 * @param $path
 */
function fileapi_driver_s3_remove($settings, $path) {
  clearstatcache();
}

/**
 * copy a file using standard php functions
 * @param $src
 * @param $dst
 */
function fileapi_driver_s3_copy($settings, $src, $dst) {
}

/**
 * move a file using standard php functions
 * @param $src
 * @param $dst
 */
function fileapi_driver_s3_move($settings, $src, $dst) {
}

/**
 * check if  a file exists using standard php functions
 * @param $path
 */
function fileapi_driver_s3_exists($settings, $path) {
}

/**
 * touch a path and create a file there.
 * @param $path 
 *    path to be touched.
 */
function fileapi_driver_s3_touch($settings, $path) {
  $tmp = file_directory_tmp() .'/'. basename($path);
  touch($tmp);
  $headers = array();
  $headers['Content-Type'] = 'text/plain';
  $body = file_get_contents($tmp);
  _s3_request('PUT', $path, $settings, array(), $body);
}


function _s3_request($method, $resource, $settings, $headers=array(), $amzheaders=array(),  $body= '') {
  
  $url = $settings['s3 url'] . $settings['bucket']; 

  // Set date to proper format for S3. 
  $headers['Date'] = gmdate(DATE_RFC822);
  $headers['Authorization'] = 'AWS '. $settings['awsID'] .':'. $signature; 

  // Build S3 authorization hash.
  $auth_string = $method ."\n\n". $headers['Content-type'] ."\n";
  $auth_string .= $headers['Date'] ."\n". implode("\n",$amzheaders) ."\n". $resource;
  $signature = hex2b64(s3_hmac_sha1($settings['awsSecret'], $auth_string));

  // Set date to proper format for S3. 
  $headers['Date'] = gmdate(DATE_RFC822);
  $headers['Authorization'] = 'AWS '. $settings['awsID'] .':'. $signature; 

  $result = drupal_http_request($url .'/'. $resource, array_merge($headers, $amzheaders), $method, $body);
  drupal_set_message('<pre>'. print_r($result, TRUE) .'</pre>');
  
}


/**
 * read the contents of a directory.
 * @param $path
 *   directory to be read.
 * @return  array
 *   action results and array of directory contents.
 */
function fileapi_driver_s3_readdir($settings, $path) {
}  

/**
 * read the contents of a file.
 * @param $path 
 *   path of file to be read.
 *
 * NOTE: we are not including offset and maxlen since it is only supported in php > 5.1.0
 *       and our support target is 4.3.0.
 */
function fileapi_driver_s3_fileread($settings, $path) {
}

function fileapi_driver_s3_filewrite($settings, $path, $data) {
}


/**
 * Generate an sha1 signed hash of a string.
 * @param K
 *    key to be used for the signature.
 * @param string
 *    string to be signed.
 */
function s3_hmac_sha1($K, $string) {
  // hash function
  $h = 'sha1';
  // byte length of blocks operated on by hash function.
  $B = '64';
  // byte length of hash function output.
  // seems unused in the HMAC algorithm
  $L = '20';
  return s3_hmac($h, $B, $K, $string);
}

/**
 * HMAC implementation for drupal as per
 * http://www.ietf.org/rfc/rfc2104.txt
 * 
 * @param $h
 *   hashing function can be any 
 * @param $B
 *   block length iterated over by hashing algorithm
 * @param $K
 *   key to be used for signing.
 * @param $string
 *   string to be signed.
 */
function s3_hmac($h, $B, $K, $string) {
  // Hash the key if it exceeds the blocklength.
  if (strlen($K) > $B) {
    // Pack that dirty string.
    $K = pack('H*', $h($K));
  }
  // pad it with 0 bytes to block length
  $K = str_pad($K, $B, chr(0x00));

  // Setup inner and outer pads as per the RFC.
  $ipad = str_repeat(chr(0x36), $B)^$K;
  $opad = str_repeat(chr(0x5C), $B)^$K;

  // Do inner concat XOR hashing. Pack that dirty string.
  $string =  pack('H*', $h($ipad.$string));

  // return outer concat XOR hash 
  return $h($opad.$string);
}
1	dopry	1.1	<?php
2
3			/**
4			* @file
5			* Amazon S3 storage driver for filesystem.
6			*/
7
8
9			/**
10			* driver settings form. called by filesystem.module when creating a respository using this driver.
11			* @param $settings
12			* settings array from database.
13			*/
14
15			function fileapi_driver_s3_settings_form($settings = array()) {
16			//debug_msg($settings);
17			$form = array(
18			'#type' => 'fieldset',
19			'#title' => t('Amazon S3 storage driver settings'),
20			'#tree' => TRUE,
21			);
22
23			$form['driver'] = array(
24			'#type' => 'hidden',
25			'#value' => 's3',
26			);
27
28			$form['s3 url'] = array(
29			'#type' => 'textfield',
30			'#title' => t('Amazon S3 url'),
31			'#default_value' => strlen($settings['s3 url']) ? $settings['s3 url'] : 'http://s3.amazonaws.com',
32			);
33
34			$form['awsID'] = array(
35			'#type' => 'textfield',
36			'#title' => t('AWS Access Key ID'),
37			'#default_value' => $settings['awsID'],
38			);
39
40			$form['awsSecret'] = array(
41			'#type' => 'textfield',
42			'#title' => t('AWS Secret'),
43			'#default_value' => $settings['awsSecret'],
44			);
45
46			return $form;
47			}
48
49			function fileapi_driver_s3_settings_form_validate() {
50			}
51
52
53			/**
54			* test if a path is a file.
55			* @param $path
56			* path to be tested
57			*/
58			function fileapi_driver_s3_is_file($settings, $path) {
59
60			}
61
62			/**
63			* test if a path is a directory.
64			* @param $path
65			* path to be tested
66			*/
67			function fileapi_driver_s3_is_dir($settings, $path) {
68			}
69
70
71			/**
72			* create a directory using standard php functions
73			* @param $path
74			*/
75			function fileapi_driver_s3_mkdir($settings, $path) {
76			}
77
78			/**
79			* remove a directory using standard php functions
80			* @param $path
81			*/
82
83			function fileapi_driver_s3_rmdir($settings, $path) {
84			}
85
86
87			/**
88			* remove a file using standard php functions
89			* @param $path
90			*/
91			function fileapi_driver_s3_remove($settings, $path) {
92			clearstatcache();
93			}
94
95			/**
96			* copy a file using standard php functions
97			* @param $src
98			* @param $dst
99			*/
100			function fileapi_driver_s3_copy($settings, $src, $dst) {
101			}
102
103			/**
104			* move a file using standard php functions
105			* @param $src
106			* @param $dst
107			*/
108			function fileapi_driver_s3_move($settings, $src, $dst) {
109			}
110
111			/**
112			* check if a file exists using standard php functions
113			* @param $path
114			*/
115			function fileapi_driver_s3_exists($settings, $path) {
116			}
117
118			/**
119			* touch a path and create a file there.
120			* @param $path
121			* path to be touched.
122			*/
123			function fileapi_driver_s3_touch($settings, $path) {
124			$tmp = file_directory_tmp() .'/'. basename($path);
125			touch($tmp);
126			$headers = array();
127			$headers['Content-Type'] = 'text/plain';
128			$body = file_get_contents($tmp);
129			_s3_request('PUT', $path, $settings, array(), $body);
130			}
131
132
133			function _s3_request($method, $resource, $settings, $headers=array(), $amzheaders=array(), $body= '') {
134
135			$url = $settings['s3 url'] . $settings['bucket'];
136
137			// Set date to proper format for S3.
138			$headers['Date'] = gmdate(DATE_RFC822);
139			$headers['Authorization'] = 'AWS '. $settings['awsID'] .':'. $signature;
140
141			// Build S3 authorization hash.
142			$auth_string = $method ."\n\n". $headers['Content-type'] ."\n";
143			$auth_string .= $headers['Date'] ."\n". implode("\n",$amzheaders) ."\n". $resource;
144			$signature = hex2b64(s3_hmac_sha1($settings['awsSecret'], $auth_string));
145
146			// Set date to proper format for S3.
147			$headers['Date'] = gmdate(DATE_RFC822);
148			$headers['Authorization'] = 'AWS '. $settings['awsID'] .':'. $signature;
149
150			$result = drupal_http_request($url .'/'. $resource, array_merge($headers, $amzheaders), $method, $body);
151			drupal_set_message('<pre>'. print_r($result, TRUE) .'</pre>');
152
153			}
154
155
156			/**
157			* read the contents of a directory.
158			* @param $path
159			* directory to be read.
160			* @return array
161			* action results and array of directory contents.
162			*/
163			function fileapi_driver_s3_readdir($settings, $path) {
164			}
165
166			/**
167			* read the contents of a file.
168			* @param $path
169			* path of file to be read.
170			*
171			* NOTE: we are not including offset and maxlen since it is only supported in php > 5.1.0
172			* and our support target is 4.3.0.
173			*/
174			function fileapi_driver_s3_fileread($settings, $path) {
175			}
176
177			function fileapi_driver_s3_filewrite($settings, $path, $data) {
178			}
179
180
181
182			/**
183			* Generate an sha1 signed hash of a string.
184			* @param K
185			* key to be used for the signature.
186			* @param string
187			* string to be signed.
188			*/
189			function s3_hmac_sha1($K, $string) {
190			// hash function
191			$h = 'sha1';
192			// byte length of blocks operated on by hash function.
193			$B = '64';
194			// byte length of hash function output.
195			// seems unused in the HMAC algorithm
196			$L = '20';
197			return s3_hmac($h, $B, $K, $string);
198			}
199
200			/**
201			* HMAC implementation for drupal as per
202			* http://www.ietf.org/rfc/rfc2104.txt
203			*
204			* @param $h
205			* hashing function can be any
206			* @param $B
207			* block length iterated over by hashing algorithm
208			* @param $K
209			* key to be used for signing.
210			* @param $string
211			* string to be signed.
212			*/
213			function s3_hmac($h, $B, $K, $string) {
214			// Hash the key if it exceeds the blocklength.
215			if (strlen($K) > $B) {
216			// Pack that dirty string.
217			$K = pack('H*', $h($K));
218			}
219			// pad it with 0 bytes to block length
220			$K = str_pad($K, $B, chr(0x00));
221
222			// Setup inner and outer pads as per the RFC.
223			$ipad = str_repeat(chr(0x36), $B)^$K;
224			$opad = str_repeat(chr(0x5C), $B)^$K;
225
226			// Do inner concat XOR hashing. Pack that dirty string.
227			$string = pack('H*', $h($ipad.$string));
228
229			// return outer concat XOR hash
230			return $h($opad.$string);
231			}