将Key对象转换为PrivateKey

Question

我需要使用KeyStore类中的以下方法：

public Key getPrivateKey(String alias)

但最后我需要PrivateKey对象，而不是Key。如何将Key对象转换为PrivateKey？ 谢谢！

Answer 1

从密钥库中键入密钥后 创建密钥对，然后从密钥对中获取pub和priv密钥，如下所示：

Key prvkey = keyStore.getKey(_alias,_keypass.toCharArray());
PublicKey pubkey = certificate.getPublicKey();
KeyPair keypair = new KeyPair(pubkey, (PrivateKey)prvkey);
PrivateKey privKewy = keypair.getPrivate();

Answer 2

//get keystore 
//jks for type "JKS",
//.p12 or .pfx for type "PKCS12"
//specification name is PKCS#12, but the # is not used in the Java keystore type name
KeyStore keystore = KeyStore.getInstance("pkcs12");
//load keystore - is FileImputStream to location of your pfx/jks file          
keystore.load(is, password);
//get private key           
PrivateKey privateKey = (PrivateKey)keystore.getKey(alias, password);