我创建了一个 RSA 密钥对。现在,我正在尝试使用 DES 算法加密私钥,将其格式化为 PKCS#5 并将其打印在控制台上。不幸的是,生成的私钥不起作用。当我尝试使用它时,输入正确的密码后,ssh 客户端返回密码无效:
加载密钥“test.key”:用于解密私钥的密码不正确
可以请有人告诉我我错在哪里吗?
这是代码:
private byte[] iv;
public void generate() throws Exception {
RSAKeyPairGenerator generator = new RSAKeyPairGenerator();
generator.initialize(2048);
KeyPair keyPair = generator.generateKeyPair();
String passphrase = "passphrase";
byte[] encryptedData = encrypt(keyPair.getPrivate().getEncoded(), passphrase);
System.out.println(getPrivateKeyPem(Base64.encodeBase64String(encryptedData)));
}
private byte[] encrypt(byte[] data, String passphrase) throws Exception {
String algorithm = "PBEWithMD5AndDES";
salt = new byte[8];
int iterations = 1024;
// Create a key from the supplied passphrase.
KeySpec ks = new PBEKeySpec(passphrase.toCharArray());
SecretKeyFactory skf = SecretKeyFactory.getInstance(algorithm);
SecretKey key = skf.generateSecret(ks);
// Create the salt from eight bytes of the digest of P || M.
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(passphrase.getBytes());
md.update(data);
byte[] digest = md.digest();
System.arraycopy(digest, 0, salt, 0, 8);
AlgorithmParameterSpec aps = new PBEParameterSpec(salt, iterations);
Cipher cipher = Cipher.getInstance(AlgorithmID.pbeWithSHAAnd3_KeyTripleDES_CBC.getJcaStandardName());
cipher.init(Cipher.ENCRYPT_MODE, key, aps);
iv = cipher.getIV();
byte[] output = cipher.doFinal(data);
ByteArrayOutputStream out = new ByteArrayOutputStream();
out.write(salt);
out.write(output);
out.close();
return out.toByteArray();
}
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