問題描述

我正在使用 RSA 算法生成公鑰和私鑰

I am using RSA algorithm to generate public and private key

final KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM);
keyGen.initialize(1024);
final KeyPair key = keyGen.generateKeyPair();
final PrivateKey privateKey=key.getPrivate();
final PublicKey publickey=key.getPublic();

之后，這些密鑰使用 Base64 編碼器進(jìn)行編碼并將其保存到數(shù)據(jù)庫(kù)中.

after that these keys are encoded using Base64 encoder and save it into database.

如何在java中將此編碼的字符串轉(zhuǎn)換為私鑰和公鑰類型是解密文件.使用 Base64Decoder 解碼此字符串時(shí)，將得到一個(gè)字節(jié)數(shù)組.如何將此字節(jié)數(shù)組轉(zhuǎn)換為公鑰或私鑰類型?

How to convert this encoded String to Private and Public Key Type in java is to decrypt file. when decoding this String using Base64Decoder will get a byte array. how to convert this Byte array to public or private key type?

推薦答案

如果你有一個(gè) byte[] 表示 key 上 getEncoded() 的輸出，你可以使用 KeyFactory 將它轉(zhuǎn)回一個(gè) PublicKey 對(duì)象或 PrivateKey對(duì)象.

If you have a byte[] representing the output of getEncoded() on a key, you can use KeyFactory to turn that back into a PublicKey object or a PrivateKey object.

byte[] privateKeyBytes;
byte[] publicKeyBytes;
KeyFactory kf = KeyFactory.getInstance("RSA"); // or "EC" or whatever
PrivateKey privateKey = kf.generatePrivate(new PKCS8EncodedKeySpec(privateKeyBytes));
PublicKey publicKey = kf.generatePublic(new X509EncodedKeySpec(publicKeyBytes));

這篇關(guān)于如何將 Byte 數(shù)組轉(zhuǎn)換為 PrivateKey 或 PublicKey 類型?的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！