RSA公钥和私钥格式化问题
转载
// 生成密钥对
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(512);
KeyPair keyPair = keyPairGenerator.generateKeyPair();
RSAPublicKey rsaPublicKey = (RSAPublicKey)keyPair.getPublic();
RSAPrivateKey rsaPrivateKey = (RSAPrivateKey)keyPair.getPrivate();
// 格式化私钥
PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(rsaPrivateKey.getEncoded());
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
Cipher cipher = Cipher.getInstance("RSA"); // 确定算法
cipher.init(Cipher.ENCRYPT_MODE, privateKey); // 确定加密密钥
byte[] result = cipher.doFinal("原文".getBytes()); // 加密
System.out.println(Base64.encodeBase64String(result));
// 格式化公钥
X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(rsaPublicKey.getEncoded());
keyFactory = KeyFactory.getInstance("RSA");
PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
cipher = Cipher.getInstance("RSA"); // 确定算法
cipher.init(Cipher.DECRYPT_MODE, publicKey); // 确定公钥
System.out.println(new String(cipher.doFinal(result))); // 解密
