有谁知道我将如何将此java代码转换为python？
/**
* signs the data for the account account
*/
private byte[] sign(String pkStr,byte[] data, String keyType) throws Exception {
BASE64Decoder decoder = new BASE64Decoder();
KeyFactory keyFac = null;
//instantiate the key factory based on the key alg type
if(keyType.equals("DSA")){
keyFac = KeyFactory.getInstance("DSA");
}else if(keyType.equals("RSA")){
keyFac = KeyFactory.getInstance("RSA");
}
//generate the public key
PKCS8EncodedKeySpec dprks = new PKCS8EncodedKeySpec(decoder.decodeBuffer(pkStr));
PrivateKey pk = keyFac.generatePrivate(dprks);
return(signBytes(data,pk,keyType));
}
/**
* sign the data with the key
*/
private byte[] signBytes(byte [] data,
PrivateKey signingPrivateKey, String keyType)throws Exception {
Signature dsa = null;
//instantiate the signature alg based on the key type
if(keyType.equals("DSA")){
dsa = Signature.getInstance("SHA1withDSA");
}else if(keyType.equals("RSA")){
dsa = Signature.getInstance("SHA1withRSA");
}
/* Initializing the object with a private key */
dsa.initSign(signingPrivateKey);
/* Update and sign the data */
dsa.update(data);
byte[] sig = dsa.sign();
return sig;
}
“keyType”似乎总是作为“DSA”传递，所以我查看了M2Crypto.DSA，这看起来很有希望。然而，DSA.sign 函数返回一个 2 字节字符串的元组，我完全不确定如何处理。