python里面的pkcs7加密好像实现不一样，得出的结果完全不一样
php的代码如下
public static function envelope($data){
$Millisecond = SignEnvelope::getMillisecond();
//保存源数据文件
$dataFile = "./rsa/".$Millisecond."data.txt";
//保存签名文件
$signedFile = "./rsa/".$Millisecond."signed.txt";
//保存签名后base64文件
$signedDataFile = "./rsa/".$Millisecond."signedData.txt";
//保存信封后文件
$envelopeFile = "./rsa/".$Millisecond."envelope.txt";
#加载p12
openssl_pkcs12_read (file_get_contents(Contants::pri), $certs, Contants::passWord);
$signCert = $certs ['cert'];
$signKey = $certs['pkey'];
#加载加密证书
$encryCert = file_get_contents(Contants::pub);
#加密原文
$fp = fopen($dataFile, "w");
fwrite($fp, $data);
fclose($fp);
#签名
openssl_pkcs7_sign($dataFile,$signedFile,
$signCert, array($signKey,""), NULL, PKCS7_NOATTR|PKCS7_BINARY|PKCS7_NOSIGS);
$signedBase64 = file_get_contents($signedFile);
$signedBase64 = substr($signedBase64, strpos($signedBase64, "base64") + strlen("base64"));
trim($signedBase64);
#print_r($signedBase64);
#echo "<br/><br/><br/>";
$signedData = base64_decode($signedBase64);
$fp = fopen($signedDataFile, "w");
fwrite($fp, $signedData);
fclose($fp);
#信封
openssl_pkcs7_encrypt($signedDataFile,$envelopeFile,
$encryCert, NULL, PKCS7_BINARY, OPENSSL_CIPHER_3DES);
$envelopeBase64 = file_get_contents($envelopeFile);
$envelopeBase64 = substr($envelopeBase64, strpos($envelopeBase64, "base64") + strlen("base64"));
trim($envelopeBase64);
$envelopeBase64 = base64_decode($envelopeBase64);
$envelopeBase64 = base64_encode($envelopeBase64);
//$envelopeBase64 = str_replace("\r\n","",$envelopeBase64);
//print_r( $envelopeBase64 );
//删除加密过程中创建的文件
unlink($dataFile);
unlink($signedFile);
unlink($signedDataFile);
unlink($envelopeFile);
return $envelopeBase64;}
如果要用python实现这个方法的话，应该怎么写？
