/**
* Convert the loaded image to a JPEG and then return a structure for the PDF creator.
* This function requires GD library and write access to the directory defined on K_PATH_CACHE constant.
* @param $image (image) Image object.
* @param $quality (int) JPEG quality.
* return image JPEG image object.
* @public static
*/
public static function _toJPEG($image, $quality)
{
$tempname = TCPDF_STATIC::getObjFilename('img');
imagejpeg($image, $tempname, $quality);
imagedestroy($image);
$retvars = self::_parsejpeg($tempname);
// tidy up by removing temporary image
unlink($tempname);
return $retvars;
}
/**
* Set font buffer content.
* @param $font (string) font key
* @param $data (array) font data
* @protected
* @since 4.5.000 (2009-01-02)
*/
protected function setFontBuffer($font, $data)
{
if ($this->diskcache) {
if (!isset($this->fonts[$font])) {
$this->fonts[$font] = TCPDF_STATIC::getObjFilename('font');
}
$this->writeDiskCache($this->fonts[$font], serialize($data));
} else {
$this->fonts[$font] = $data;
}
if (!in_array($font, $this->fontkeys)) {
$this->fontkeys[] = $font;
// store object ID for current font
++$this->n;
$this->font_obj_ids[$font] = $this->n;
$this->setFontSubBuffer($font, 'n', $this->n);
}
}
/**
* Compute encryption key
* @protected
* @since 2.0.000 (2008-01-02)
* @author Nicola Asuni
*/
protected function _generateencryptionkey()
{
$keybytelen = $this->encryptdata['Length'] / 8;
if (!$this->encryptdata['pubkey']) {
// standard mode
if ($this->encryptdata['mode'] == 3) {
// AES-256
// generate 256 bit random key
$this->encryptdata['key'] = substr(hash('sha256', TCPDF_STATIC::getRandomSeed(), true), 0, $keybytelen);
// truncate passwords
$this->encryptdata['user_password'] = $this->_fixAES256Password($this->encryptdata['user_password']);
$this->encryptdata['owner_password'] = $this->_fixAES256Password($this->encryptdata['owner_password']);
// Compute U value
$this->encryptdata['U'] = $this->_Uvalue();
// Compute UE value
$this->encryptdata['UE'] = $this->_UEvalue();
// Compute O value
$this->encryptdata['O'] = $this->_Ovalue();
// Compute OE value
$this->encryptdata['OE'] = $this->_OEvalue();
// Compute P value
$this->encryptdata['P'] = $this->encryptdata['protection'];
// Computing the encryption dictionary's Perms (permissions) value
$perms = TCPDF_STATIC::getEncPermissionsString($this->encryptdata['protection']);
// bytes 0-3
$perms .= chr(255) . chr(255) . chr(255) . chr(255);
// bytes 4-7
if (isset($this->encryptdata['CF']['EncryptMetadata']) and !$this->encryptdata['CF']['EncryptMetadata']) {
// byte 8
$perms .= 'F';
} else {
$perms .= 'T';
}
$perms .= 'adb';
// bytes 9-11
$perms .= 'nick';
// bytes 12-15
$this->encryptdata['perms'] = TCPDF_STATIC::_AESnopad($this->encryptdata['key'], $perms);
} else {
// RC4-40, RC4-128, AES-128
// Pad passwords
$this->encryptdata['user_password'] = substr($this->encryptdata['user_password'] . TCPDF_STATIC::$enc_padding, 0, 32);
$this->encryptdata['owner_password'] = substr($this->encryptdata['owner_password'] . TCPDF_STATIC::$enc_padding, 0, 32);
// Compute O value
$this->encryptdata['O'] = $this->_Ovalue();
// get default permissions (reverse byte order)
$permissions = TCPDF_STATIC::getEncPermissionsString($this->encryptdata['protection']);
// Compute encryption key
$tmp = TCPDF_STATIC::_md5_16($this->encryptdata['user_password'] . $this->encryptdata['O'] . $permissions . $this->encryptdata['fileid']);
if ($this->encryptdata['mode'] > 0) {
for ($i = 0; $i < 50; ++$i) {
$tmp = TCPDF_STATIC::_md5_16(substr($tmp, 0, $keybytelen));
}
}
$this->encryptdata['key'] = substr($tmp, 0, $keybytelen);
// Compute U value
$this->encryptdata['U'] = $this->_Uvalue();
// Compute P value
$this->encryptdata['P'] = $this->encryptdata['protection'];
}
} else {
// Public-Key mode
// random 20-byte seed
$seed = sha1(TCPDF_STATIC::getRandomSeed(), true);
$recipient_bytes = '';
foreach ($this->encryptdata['pubkeys'] as $pubkey) {
// for each public certificate
if (isset($pubkey['p'])) {
$pkprotection = TCPDF_STATIC::getUserPermissionCode($pubkey['p'], $this->encryptdata['mode']);
} else {
$pkprotection = $this->encryptdata['protection'];
}
// get default permissions (reverse byte order)
$pkpermissions = TCPDF_STATIC::getEncPermissionsString($pkprotection);
// envelope data
$envelope = $seed . $pkpermissions;
// write the envelope data to a temporary file
$tempkeyfile = TCPDF_STATIC::getObjFilename('key', $this->file_id);
$f = TCPDF_STATIC::fopenLocal($tempkeyfile, 'wb');
if (!$f) {
$this->Error('Unable to create temporary key file: ' . $tempkeyfile);
}
$envelope_length = strlen($envelope);
fwrite($f, $envelope, $envelope_length);
fclose($f);
$tempencfile = TCPDF_STATIC::getObjFilename('enc', $this->file_id);
if (!openssl_pkcs7_encrypt($tempkeyfile, $tempencfile, $pubkey['c'], array(), PKCS7_BINARY | PKCS7_DETACHED)) {
$this->Error('Unable to encrypt the file: ' . $tempkeyfile);
}
// read encryption signature
$signature = file_get_contents($tempencfile, false, null, $envelope_length);
// extract signature
$signature = substr($signature, strpos($signature, 'Content-Disposition'));
$tmparr = explode("\n\n", $signature);
$signature = trim($tmparr[1]);
unset($tmparr);
// decode signature
$signature = base64_decode($signature);
// convert signature to hex
$hexsignature = current(unpack('H*', $signature));
// store signature on recipients array
$this->encryptdata['Recipients'][] = $hexsignature;
// The bytes of each item in the Recipients array of PKCS#7 objects in the order in which they appear in the array
$recipient_bytes .= $signature;
}
// calculate encryption key
if ($this->encryptdata['mode'] == 3) {
// AES-256
$this->encryptdata['key'] = substr(hash('sha256', $seed . $recipient_bytes, true), 0, $keybytelen);
} else {
// RC4-40, RC4-128, AES-128
$this->encryptdata['key'] = substr(sha1($seed . $recipient_bytes, true), 0, $keybytelen);
}
}
}
/**
* Overriden to allow unicode in filenames
* @see http://sourceforge.net/p/tcpdf/feature-requests/184/
*
* Send the document to a given destination: string, local file or browser.
* In the last case, the plug-in may be used (if present) or a download ("Save as" dialog box) may be forced.<br />
* The method first calls Close() if necessary to terminate the document.
* @param $name (string) The name of the file when saved. Note that special characters are removed and blanks characters are replaced with the underscore character.
* @param $dest (string) Destination where to send the document. It can take one of the following values:<ul><li>I: send the file inline to the browser (default). The plug-in is used if available. The name given by name is used when one selects the "Save as" option on the link generating the PDF.</li><li>D: send to the browser and force a file download with the name given by name.</li><li>F: save to a local server file with the name given by name.</li><li>S: return the document as a string (name is ignored).</li><li>FI: equivalent to F + I option</li><li>FD: equivalent to F + D option</li><li>E: return the document as base64 mime multi-part email attachment (RFC 2045)</li></ul>
* @public
* @since 1.0
* @see Close()
*/
public function Output($name = 'doc.pdf', $dest = 'I')
{
//Output PDF to some destination
//Finish document if necessary
if ($this->state < 3) {
$this->Close();
}
//Normalize parameters
if (is_bool($dest)) {
$dest = $dest ? 'D' : 'F';
}
$dest = strtoupper($dest);
if ($dest[0] != 'F') {
$name = preg_replace('/[\\s]+/', '_', $name);
$name = preg_replace('/[^\\p{L}\\p{N}_\\.-]/u', '', $name);
}
if ($this->sign) {
// *** apply digital signature to the document ***
// get the document content
$pdfdoc = $this->getBuffer();
// remove last newline
$pdfdoc = substr($pdfdoc, 0, -1);
// Remove the original buffer
if (isset($this->diskcache) and $this->diskcache) {
// remove buffer file from cache
unlink($this->buffer);
}
unset($this->buffer);
// remove filler space
$byterange_string_len = strlen(TCPDF_STATIC::$byterange_string);
// define the ByteRange
$byte_range = array();
$byte_range[0] = 0;
$byte_range[1] = strpos($pdfdoc, TCPDF_STATIC::$byterange_string) + $byterange_string_len + 10;
$byte_range[2] = $byte_range[1] + $this->signature_max_length + 2;
$byte_range[3] = strlen($pdfdoc) - $byte_range[2];
$pdfdoc = substr($pdfdoc, 0, $byte_range[1]) . substr($pdfdoc, $byte_range[2]);
// replace the ByteRange
$byterange = sprintf('/ByteRange[0 %u %u %u]', $byte_range[1], $byte_range[2], $byte_range[3]);
$byterange .= str_repeat(' ', $byterange_string_len - strlen($byterange));
$pdfdoc = str_replace(TCPDF_STATIC::$byterange_string, $byterange, $pdfdoc);
// write the document to a temporary folder
$tempdoc = TCPDF_STATIC::getObjFilename('doc');
$f = fopen($tempdoc, 'wb');
if (!$f) {
$this->Error('Unable to create temporary file: ' . $tempdoc);
}
$pdfdoc_length = strlen($pdfdoc);
fwrite($f, $pdfdoc, $pdfdoc_length);
fclose($f);
// get digital signature via openssl library
$tempsign = TCPDF_STATIC::getObjFilename('sig');
if (empty($this->signature_data['extracerts'])) {
openssl_pkcs7_sign($tempdoc, $tempsign, $this->signature_data['signcert'], array($this->signature_data['privkey'], $this->signature_data['password']), array(), PKCS7_BINARY | PKCS7_DETACHED);
} else {
openssl_pkcs7_sign($tempdoc, $tempsign, $this->signature_data['signcert'], array($this->signature_data['privkey'], $this->signature_data['password']), array(), PKCS7_BINARY | PKCS7_DETACHED, $this->signature_data['extracerts']);
}
unlink($tempdoc);
// read signature
$signature = file_get_contents($tempsign);
unlink($tempsign);
// extract signature
$signature = substr($signature, $pdfdoc_length);
$signature = substr($signature, strpos($signature, "%%EOF\n\n------") + 13);
$tmparr = explode("\n\n", $signature);
$signature = $tmparr[1];
unset($tmparr);
// decode signature
$signature = base64_decode(trim($signature));
// convert signature to hex
$signature = current(unpack('H*', $signature));
$signature = str_pad($signature, $this->signature_max_length, '0');
// disable disk caching
$this->diskcache = false;
// Add signature to the document
$this->buffer = substr($pdfdoc, 0, $byte_range[1]) . '<' . $signature . '>' . substr($pdfdoc, $byte_range[1]);
$this->bufferlen = strlen($this->buffer);
}
switch ($dest) {
case 'I':
// Send PDF to the standard output
if (ob_get_contents()) {
$this->Error('Some data has already been output, can\'t send PDF file');
}
if (php_sapi_name() != 'cli') {
// send output to a browser
header('Content-Type: application/pdf');
if (headers_sent()) {
$this->Error('Some data has already been output to browser, can\'t send PDF file');
}
header('Cache-Control: private, must-revalidate, post-check=0, pre-check=0, max-age=1');
//header('Cache-Control: public, must-revalidate, max-age=0'); // HTTP/1.1
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
// Date in the past
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Content-Disposition: inline; filename="' . basename($name) . '"');
TCPDF_STATIC::sendOutputData($this->getBuffer(), $this->bufferlen);
} else {
echo $this->getBuffer();
}
break;
case 'D':
// download PDF as file
if (ob_get_contents()) {
$this->Error('Some data has already been output, can\'t send PDF file');
}
header('Content-Description: File Transfer');
if (headers_sent()) {
$this->Error('Some data has already been output to browser, can\'t send PDF file');
}
header('Cache-Control: private, must-revalidate, post-check=0, pre-check=0, max-age=1');
//header('Cache-Control: public, must-revalidate, max-age=0'); // HTTP/1.1
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
// Date in the past
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
// force download dialog
if (strpos(php_sapi_name(), 'cgi') === false) {
header('Content-Type: application/force-download');
header('Content-Type: application/octet-stream', false);
header('Content-Type: application/download', false);
header('Content-Type: application/pdf', false);
} else {
header('Content-Type: application/pdf');
}
// use the Content-Disposition header to supply a recommended filename
header('Content-Disposition: attachment; filename="' . basename($name) . '"');
header('Content-Transfer-Encoding: binary');
TCPDF_STATIC::sendOutputData($this->getBuffer(), $this->bufferlen);
break;
case 'F':
case 'FI':
case 'FD':
// save PDF to a local file
if ($this->diskcache) {
copy($this->buffer, $name);
} else {
$f = fopen($name, 'wb');
if (!$f) {
$this->Error('Unable to create output file: ' . $name);
}
fwrite($f, $this->getBuffer(), $this->bufferlen);
fclose($f);
}
if ($dest == 'FI') {
// send headers to browser
header('Content-Type: application/pdf');
header('Cache-Control: private, must-revalidate, post-check=0, pre-check=0, max-age=1');
//header('Cache-Control: public, must-revalidate, max-age=0'); // HTTP/1.1
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
// Date in the past
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Content-Disposition: inline; filename="' . basename($name) . '"');
TCPDF_STATIC::sendOutputData(file_get_contents($name), filesize($name));
} elseif ($dest == 'FD') {
// send headers to browser
if (ob_get_contents()) {
$this->Error('Some data has already been output, can\'t send PDF file');
}
header('Content-Description: File Transfer');
if (headers_sent()) {
$this->Error('Some data has already been output to browser, can\'t send PDF file');
}
header('Cache-Control: private, must-revalidate, post-check=0, pre-check=0, max-age=1');
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
// Date in the past
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
// force download dialog
if (strpos(php_sapi_name(), 'cgi') === false) {
header('Content-Type: application/force-download');
header('Content-Type: application/octet-stream', false);
header('Content-Type: application/download', false);
header('Content-Type: application/pdf', false);
} else {
header('Content-Type: application/pdf');
}
// use the Content-Disposition header to supply a recommended filename
header('Content-Disposition: attachment; filename="' . basename($name) . '"');
header('Content-Transfer-Encoding: binary');
TCPDF_STATIC::sendOutputData(file_get_contents($name), filesize($name));
}
break;
case 'E':
// return PDF as base64 mime multi-part email attachment (RFC 2045)
$retval = 'Content-Type: application/pdf;' . "\r\n";
$retval .= ' name="' . $name . '"' . "\r\n";
$retval .= 'Content-Transfer-Encoding: base64' . "\r\n";
$retval .= 'Content-Disposition: attachment;' . "\r\n";
$retval .= ' filename="' . $name . '"' . "\r\n\r\n";
$retval .= chunk_split(base64_encode($this->getBuffer()), 76, "\r\n");
return $retval;
case 'S':
// returns PDF as a string
return $this->getBuffer();
default:
$this->Error('Incorrect output destination: ' . $dest);
}
return '';
}
