+
+/**
+ * Finalyze an asynchronous upload.
+ * @param $ref asynchronous upload reference
+ * @param $code client code for this operation
+ * @param $crypt boolean asking to crypt or not
+ * @return a string containing the download reference followed by a delete code or the string "Error"
+ */
+function
+jirafeau_async_end ($ref, $code, $crypt)
+{
+ /* Get async infos. */
+ $a = jirafeau_get_async_ref ($ref);
+ if (count ($a) == 0
+ || $a['next_code'] != "$code")
+ return "Error";
+
+ /* Generate link infos. */
+ $p = VAR_ASYNC . s2p ($ref) . $ref . "_data";
+ if (!file_exists($p))
+ return "Error";
+
+ $crypted = false;
+ $crypt_key = '';
+ if ($crypt == true && extension_loaded('mcrypt'))
+ {
+ $cypt_key = jirafeau_encrypt_file ($p, $p);
+ if (strlen($crypt_key) > 0)
+ $crypted = true;
+ }
+
+ $md5 = md5_file ($p);
+ $size = filesize($p);
+ $np = s2p ($md5);
+ $delete_link_code = jirafeau_gen_random (8);
+
+ /* File already exist ? */
+ if (!file_exists (VAR_FILES . $np))
+ @mkdir (VAR_FILES . $np, 0755, true);
+ if (!file_exists (VAR_FILES . $np . $md5))
+ rename ($p, VAR_FILES . $np . $md5);
+
+ /* Increment or create count file. */
+ $counter = 0;
+ if (file_exists (VAR_FILES . $np . $md5 . '_count'))
+ {
+ $content = file (VAR_FILES . $np . $md5. '_count');
+ $counter = trim ($content[0]);
+ }
+ $counter++;
+ $handle = fopen (VAR_FILES . $np . $md5. '_count', 'w');
+ fwrite ($handle, $counter);
+ fclose ($handle);
+
+ /* Create link. */
+ $link_tmp_name = VAR_LINKS . $md5 . rand (0, 10000) . ' .tmp';
+ $handle = fopen ($link_tmp_name, 'w');
+ fwrite ($handle,
+ $a['file_name'] . NL . $a['mime_type'] . NL . $size . NL .
+ $a['key'] . NL . $a['time'] . NL . $md5 . NL . $a['onetime'] . NL .
+ date ('U') . NL . $a['ip'] . NL . $delete_link_code . NL . ($crypted ? 'C' : 'O'));
+ fclose ($handle);
+ $md5_link = base_16_to_64 (md5_file ($link_tmp_name));
+ $l = s2p ("$md5_link");
+ if (!@mkdir (VAR_LINKS . $l, 0755, true) ||
+ !rename ($link_tmp_name, VAR_LINKS . $l . $md5_link))
+ echo "Error";
+
+ /* Clean async upload. */
+ jirafeau_async_delete ($ref);
+ return $md5_link . NL . $delete_link_code . NL . urlencode($crypt_key);
+}
+
+/**
+ * Delete a block.
+ * @param $id identifier of the block.
+ */
+function
+jirafeau_block_delete_ ($id)
+{
+ $p = VAR_BLOCK . s2p ($id);
+ if (!file_exists ($p))
+ return;
+
+ if (file_exists ($p . $id))
+ unlink ($p . $id);
+ if (file_exists ($p . $id . '_infos'))
+ unlink ($p . $id . '_infos');
+ $parse = $p;
+ $scan = array();
+ while (file_exists ($parse)
+ && ($scan = scandir ($parse))
+ && count ($scan) == 2 // '.' and '..' folders => empty.
+ && basename ($parse) != basename (VAR_BLOCK))
+ {
+ rmdir ($parse);
+ $parse = substr ($parse, 0, strlen($parse) - strlen(basename ($parse)) - 1);
+ }
+}
+
+/**
+ * Create a file filled with zeros.
+ * @param $size size of the file.
+ * @return a string corresponding to an id or the string "Error"
+ */
+function
+jirafeau_block_init ($size)
+{
+ if (!ctype_digit ($size) || $size <= 0)
+ return "Error";
+
+ /* Create folder. */
+ $id;
+ do
+ {
+ $id = jirafeau_gen_random (32);
+ $p = VAR_BLOCK . s2p ($id);
+ } while (file_exists ($p));
+ @mkdir ($p, 0755, true);
+ if (!file_exists ($p))
+ {
+ echo "Error";
+ return;
+ }
+
+ /* Create block. */
+ $p .= $id;
+ $h = fopen ($p, 'w');
+ $fill = str_repeat ("\0", 1024);
+ for ($cnt = 0; $cnt < $size; $cnt += 1024)
+ {
+ if ($size - $cnt < 1024)
+ $fill = str_repeat ("\0", $size - $cnt);
+ if (fwrite ($h, $fill) === false)
+ {
+ fclose ($h);
+ jirafeau_block_delete_ ($id);
+ return "Error";
+ }
+ }
+ fclose ($h);
+
+ /* Generate a write/delete code. */
+ $code = jirafeau_gen_random (12);
+
+ /* Add block infos. */
+ if (file_put_contents ($p . '_infos', date ('U') . NL . $size . NL . $code) === FALSE)
+ {
+ jirafeau_block_delete_ ($id);
+ return "Error";
+ }
+
+ return $id . NL . $code;
+}
+
+/** Get block size in bytes.
+ * @param $id identifier of the block
+ * @return block size in bytes
+ */
+function
+jirafeau_block_get_size ($id)
+{
+ $p = VAR_BLOCK . s2p ($id) . $id;
+ if (!file_exists ($p))
+ return "Error";
+
+ /* Check date. */
+ $f = file ($p . '_infos');
+ $date = trim ($f[0]);
+ $block_size = trim ($f[1]);
+ $stored_code = trim ($f[2]);
+ /* Update date. */
+ if (date ('U') - $date > JIRAFEAU_HOUR
+ && date ('U') - $date < JIRAFEAU_MONTH)
+ {
+ if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
+ {
+ jirafeau_block_delete_ ($id);
+ return "Error";
+ }
+ }
+ /* Remove data. */
+ elseif (date ('U') - $date >= JIRAFEAU_MONTH)
+ {
+ echo date ('U'). " $date ";
+ jirafeau_block_delete_ ($id);
+ return "Error";
+ }
+
+ return $block_size;
+}
+
+/**
+ * Read some data in a block.
+ * @param $id identifier of the block
+ * @param $start where to read data (starting from zero).
+ * @param $length length to read.
+ * @return echo data
+ */
+function
+jirafeau_block_read ($id, $start, $length)
+{
+ if (!ctype_digit ($start) || $start < 0
+ || !ctype_digit ($length) || $length <= 0)
+ {
+ echo "Error";
+ return;
+ }
+
+ $p = VAR_BLOCK . s2p ($id) . $id;
+ if (!file_exists ($p))
+ {
+ echo "Error";
+ return;
+ }
+
+ /* Check date. */
+ $f = file ($p . '_infos');
+ $date = trim ($f[0]);
+ $block_size = trim ($f[1]);
+ $stored_code = trim ($f[2]);
+ /* Update date. */
+ if (date ('U') - $date > JIRAFEAU_HOUR
+ && date ('U') - $date < JIRAFEAU_MONTH)
+ {
+ if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
+ {
+ jirafeau_block_delete_ ($id);
+ echo "Error";
+ return;
+ }
+ }
+ /* Remove data. */
+ elseif (date ('U') - $date >= JIRAFEAU_MONTH)
+ {
+ echo date ('U'). " $date ";
+ jirafeau_block_delete_ ($id);
+ echo "Error";
+ return;
+ }
+
+ if ($start + $length > $block_size)
+ {
+ echo "Error";
+ return;
+ }
+
+ /* Read content. */
+ header ('Content-Length: ' . $length);
+ header ('Content-Disposition: attachment');
+
+ $r = fopen ($p, 'r');
+ if (fseek ($r, $start) != 0)
+ {
+ echo "Error";
+ return;
+ }
+ $c = 1024;
+ for ($cnt = 0; $cnt < $length && !feof ($r); $cnt += 1024)
+ {
+ if ($length - $cnt < 1024)
+ $c = $length - $cnt;
+ print fread ($r, $c);
+ ob_flush();
+ }
+ fclose ($r);
+}
+
+/**
+ * Write some data in a block.
+ * @param $id identifier of the block
+ * @param $start where to writing data (starting from zero).
+ * @param $data data to write.
+ * @param $code code to allow writing.
+ * @return string "Ok" or string "Error".
+ */
+function
+jirafeau_block_write ($id, $start, $data, $code)
+{
+ if (!ctype_digit ($start) || $start < 0
+ || strlen ($code) == 0)
+ return "Error";
+
+ $p = VAR_BLOCK . s2p ($id) . $id;
+ if (!file_exists ($p))
+ return "Error";
+
+ /* Check date. */
+ $f = file ($p . '_infos');
+ $date = trim ($f[0]);
+ $block_size = trim ($f[1]);
+ $stored_code = trim ($f[2]);
+ /* Update date. */
+ if (date ('U') - $date > JIRAFEAU_HOUR
+ && date ('U') - $date < JIRAFEAU_MONTH)
+ {
+ if (file_put_contents ($p . '_infos', date ('U') . NL . $block_size . NL . $stored_code) === FALSE)
+ {
+ jirafeau_block_delete_ ($id);
+ return "Error";
+ }
+ }
+ /* Remove data. */
+ elseif (date ('U') - $date >= JIRAFEAU_MONTH)
+ {
+ jirafeau_block_delete_ ($id);
+ return "Error";
+ }
+
+ /* Check code. */
+ if ($stored_code != $code)
+ {
+ echo "Error";
+ return;
+ }
+
+ /* Check data. */
+ $size = $data['size'];
+ if ($size <= 0)
+ return "Error";
+ if ($start + $size > $block_size)
+ return "Error";
+
+ /* Open data. */
+ $r = fopen ($data['tmp_name'], 'r');
+
+ /* Open Block. */
+ $w = fopen ($p, 'r+');
+ if (fseek ($w, $start) != 0)
+ return "Error";
+
+ /* Write content. */
+ $c = 1024;
+ for ($cnt = 0; $cnt <= $size && !feof ($w); $cnt += 1024)
+ {
+ if ($size - $cnt < 1024)
+ $c = $size - $cnt;
+ $d = fread ($r, $c);
+ fwrite ($w, $d);
+ }
+ fclose ($r);
+ fclose ($w);
+ unlink ($data['tmp_name']);
+ return "Ok";
+}
+
+/**
+ * Delete a block.
+ * @param $id identifier of the block.
+ * @param $code code to allow writing.
+ * @return string "Ok" or string "Error".
+ */
+function
+jirafeau_block_delete ($id, $code)
+{
+ $p = VAR_BLOCK . s2p ($id) . $id;
+
+ if (!file_exists ($p))
+ return "Error";
+
+ $f = file ($p . '_infos');
+ $date = trim ($f[0]);
+ $block_size = trim ($f[1]);
+ $stored_code = trim ($f[2]);
+
+ if ($code != $stored_code)
+ return "Error";
+
+ jirafeau_block_delete_ ($id);
+ return "Ok";
+}
+
+/**
+ * Clean old unused blocks.
+ * @return number of cleaned blocks.
+ */
+function
+jirafeau_admin_clean_block ()
+{
+ $count = 0;
+ /* Get all blocks. */
+ $stack = array (VAR_BLOCK);
+ while (($d = array_shift ($stack)) && $d != NULL)
+ {
+ $dir = scandir ($d);
+
+ foreach ($dir as $node)
+ {
+ if (strcmp ($node, '.') == 0 || strcmp ($node, '..') == 0)
+ continue;
+
+ if (is_dir ($d . $node))
+ {
+ /* Push new found directory. */
+ $stack[] = $d . $node . '/';
+ }
+ elseif (is_file ($d . $node) && preg_match ('/\_infos/i', "$node"))
+ {
+ /* Read block informations. */
+ $f = file ($d . $node);
+ $date = trim ($f[0]);
+ $block_size = trim ($f[1]);
+ if (date ('U') - $date >= JIRAFEAU_MONTH)
+ {
+ jirafeau_block_delete_ (substr($node, 0, -6));
+ $count++;
+ }
+ }
+ }
+ }
+ return $count;
+}
+
+/**
+ * Crypt file and returns decrypt key.
+ * @param $fp_src file path to the file to crypt.
+ * @param $fp_dst file path to the file to write crypted file (could be the same).
+ * @return decrypt key composed of the key and the iv separated by a point ('.')
+ */
+function
+jirafeau_encrypt_file ($fp_src, $fp_dst)
+{
+ $fs = filesize ($fp_src);
+ if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
+ return '';
+
+ /* Prepare module. */
+ $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
+ $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($m), MCRYPT_DEV_URANDOM);
+ /* Generate key. */
+ $ks = mcrypt_enc_get_key_size($m);
+ $key = substr(md5(jirafeau_gen_random(12)), 0, $ks);
+ /* Init module. */
+ mcrypt_generic_init($m, $key, $iv);
+ /* Crypt file. */
+ $r = fopen ($fp_src, 'r');
+ $w = fopen ($fp_dst, 'c');
+ while (!feof ($r))
+ {
+ $enc = mcrypt_generic($m, fread ($r, 1024));
+ if (fwrite ($w, $enc) === false)
+ return '';
+ }
+ fclose ($r);
+ fclose ($w);
+ /* Cleanup. */
+ mcrypt_generic_deinit($m);
+ mcrypt_module_close($m);
+ return $key . "." . base64_encode($iv);
+}
+
+/**
+ * Decrypt file.
+ * @param $fp_src file path to the file to decrypt.
+ * @param $fp_dst file path to the file to write decrypted file (could be the same).
+ * @param $k string composed of the key and the iv separated by a point ('.')
+ * @return key used to decrypt. a string of length 0 is returned if failed.
+ */
+function
+jirafeau_decrypt_file ($fp_src, $fp_dst, $k)
+{
+ $fs = filesize ($fp_src);
+ if ($fs === false || $fs == 0 || !extension_loaded('mcrypt'))
+ return false;
+
+ /* Extract key and iv. */
+ $ex = explode (".", $k);
+ $key = $ex[0];
+ $iv = base64_decode($ex[1]);
+ /* Init module */
+ $m = mcrypt_module_open('rijndael-256', '', 'ofb', '');
+ mcrypt_generic_init($m, $key, $iv);
+ /* Decrypt file. */
+ $r = fopen ($fp_src, 'r');
+ $w = fopen ($fp_dst, 'c');
+ while (!feof ($r))
+ {
+ $dec = mdecrypt_generic($m, fread ($r, 1024));
+ if (fwrite ($w, $dec) === false)
+ return false;
+ }
+ fclose ($r);
+ fclose ($w);
+ /* Cleanup. */
+ mcrypt_generic_deinit($m);
+ mcrypt_module_close($m);
+ return true;
+}
+
git.p6c8.net / jirafeau_project.git / blobdiff