我正在尝试对 Android 上的数据进行 RSA 加密并将其发送到服务器(spring)。得到 BadPaddingException :
方法:服务器以字符串形式发送公钥,我将其转换为 PublicKey 对象并在加密后作为字符串从 App 发送数据。服务器有一个私钥字符串,它被转换为 PublicKey 对象,然后数据被解密。
任何帮助将非常感激。
密钥的生成:
public static KeyPair generateKeyPairRSA() {
try {
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
keyGen.initialize(1024, random);
KeyPair keyPair = keyGen.generateKeyPair();
return keyPair;
} catch (Exception e) {
Log.d(TAG,e.getLocalizedMessage());
}
return null;
}
public byte[] RSAEncrypt(final String plain, PublicKey publicKey) throws Exception {
Cipher cipher = Cipher.getInstance(ALGO_RSA);
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
byte[] encryptedBytes = cipher.doFinal(plain.getBytes());
return encryptedBytes;
}
public static PublicKey loadPublicKey1(String stored) throws Exception{
byte[] data = Base64.decode(stored.getBytes());
X509EncodedKeySpec spec = new X509EncodedKeySpec(data);
KeyFactory fact = KeyFactory.getInstance(ALGO_RSA);
return fact.generatePublic(spec);
}
服务器方法:
public byte[] decryptRSA(String inputData) throws Exception {
byte[] inputBytes = Base64.decodeBase64(inputData);
PrivateKey key = loadPrivateKey(getPrivateKey());
Cipher cipher1 = Cipher.getInstance("RSA");
cipher1.init(Cipher.DECRYPT_MODE, key);
return cipher1.doFinal(inputBytes);
}
private PrivateKey loadPrivateKey(String key64) throws Exception {
byte[] pkcs8EncodedBytes = Base64.decodeBase64(key64);
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(pkcs8EncodedBytes);
KeyFactory kf = KeyFactory.getInstance("RSA");
return kf.generatePrivate(keySpec);
}