openssl_open()

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

打开密封的数据

说明

openssl_open(string $sealed_data,string &$open_data,string $env_key, mixed $priv_key_id[,string $method= "RC4"[,string &$iv]]): bool

openssl_open()使用与密钥标识符$priv_key_id和信封密钥$env_key相关联的私钥打开(解密)$sealed_data数据,使用解密后的数据填充$open_data。当数据被密封时，就生成了信封密钥且只能由一个特定的私钥使用。更多信息参见openssl_seal()。

参数

$sealed_data

$open_data

如果调用成功，则在这个参数中返回打开的数据。

$env_key

$priv_key_id

$method

加解密算法。

$iv

初始化向量。

返回值

成功时返回TRUE，或者在失败时返回FALSE。

更新日志

范例

openssl_open()范例

<?php
// $sealed and $env_key are assumed to contain the sealed data
// and our envelope key, both given to us by the sealer.
// fetch private key from file and ready it
$fp = fopen("/src/openssl-0.9.6/demos/sign/key.pem", "r");
$priv_key = fread($fp, 8192);
fclose($fp);
$pkeyid = openssl_get_privatekey($priv_key);
// decrypt the data and store it in $open
if (openssl_open($sealed, $open, $env_key, $pkeyid)) {
    echo "here is the opened data: ", $open;
} else {
    echo "failed to open data";
}
// free the private key from memory
openssl_free_key($pkeyid);
?>

参见

• openssl_seal()密封(加密)数据

PHP compiled without OpenSSL support? Here's how you can call the openssl command-line utility to achieve the same goal:
<?php
// $sealed and $env_key are assumed to contain the sealed data
// and our envelope key, both given to us by the sealer.
// specify private key file and passphrase
$pkey_file='key.pem';
$pkey_pp='netsvc';
// call openssl to decrypt envelope key
$ph=proc_open('openssl rsautl -decrypt -inkey '.
 escapeshellarg($pkey_file).' -passin fd:3',array(
 0 => array('pipe','r'), // stdin < envelope key
 1 => array('pipe','w'), // stdout > decoded envelope key
 2 => STDERR,
 3 => array('pipe','r'), // < passphrase
 ),$pipes);
// write envelope key
fwrite($pipes[0],$env_key);
fclose($pipes[0]);
// write private key passphrase
fwrite($pipes[3],$pkey_pp);
fclose($pipes[3]);
// read decoded key, convert to hexadecimal
$env_key='';
while(!feof($pipes[1])){
 $env_key.=sprintf("%02x",ord(fgetc($pipes[1])));
}
fclose($pipes[1]);
if($xc=proc_close($ph)){
 echo "Exit code: $xc\n";
}
// call openssl to decryp
$ph=proc_open('openssl rc4 -d -iv 0 -K '.$env_key,array(
 0 => array('pipe','r'), // stdin < sealed data
 1 => array('pipe','w'), // stdout > opened data
 2 => STDERR,
 ),$pipes);
// write sealed data
fwrite($pipes[0],$sealed);
fclose($pipes[0]);
// read opened data
//$open=stream_get_contents($pipes[1]);
$open='';
while(!feof($pipes[1])){
 $open.=fgets($pipes[1]);
}
fclose($pipes[1]);
if($xc=proc_close($ph)){
 echo "Exit code: $xc\n";
}
// display the decrypted data
echo $open;
?>

Example code, assume mycert.pem is a certificate containing both private and public key.
$cert = file_get_contents("mycert.pem");
$public = openssl_get_publickey($cert);
$private = openssl_get_privatekey($cert);
$data = "I'm a lumberjack and I'm okay.";
echo "Data before: {$data}\n";
openssl_seal($data, $cipher, $e, array($public));
echo "Ciphertext: {$cipher}\n";
openssl_open($cipher, $open, $e[0], $private);
echo "Decrypted: {$open}\n";