我看过很多类似的问题,但没有一个对我奏效。我只是想将从服务器检索到的PEM格式的RSA公钥转换为Android中的PublicKey
。有人能指点我一下吗?
编辑: 我已成功使用以下代码将PEM转换为PublicKey,但在编码消息时,我得到了意外的输出......
public PublicKey getFromString(String keystr) throws Exception
{
// Remove the first and last lines
String pubKeyPEM = keystr.replace("-----BEGIN PUBLIC KEY-----\n", "");
pubKeyPEM = pubKeyPEM.replace("-----END PUBLIC KEY-----", "");
// Base64 decode the data
byte [] encoded = Base64.decode(pubKeyPEM);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(encoded);
KeyFactory kf = KeyFactory.getInstance("RSA");
PublicKey pubkey = kf.generatePublic(keySpec);
return pubkey;
}
public String RSAEncrypt(final String plain) throws NoSuchAlgorithmException, NoSuchPaddingException,
InvalidKeyException, IllegalBlockSizeException, BadPaddingException, IOException {
if (pubKey!=null) {
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, pubKey);
encryptedBytes = cipher.doFinal(plain.getBytes());
Log.d("BYTES", new String(encryptedBytes));
return Hex.encodeHexString(encryptedBytes);
}
else
return null;
}
输出结果如下:
b6813f8791d67c0fa82890d005c8ff554b57143b752b34784ad271ec01bfaa9a6a31e7ae08444baef1585a6f78f3f848eecb1706bf7b2868fccefc9d728c30480f3aabc9ac5c3a9b4b3c74c2f7d6f0da235234953ea24b644112e04a2ec619f6bf95306ef30563c4608ec4b53ed7c15736d5f79c7fa1e35f2444beb366ae4c71
当我期望得到更接近以下内容时:
JfoSJGo1qELUbpzH8d4QXtafup+J2F9wLxHCop00BQ4YS0cRdRCKDfHpFPZQYjNeyQj00HwHbz+vj8haTPbpdqT94AHAl+VZ+TPAiUw1U5EXLLyy4tzbmfVI7CwvMm26lwB4REzYUZdedha1caxMEfxQ5duB+x4ol9eRZM/savg=
我是否遗漏了某些格式或文件类型?
byte [] encoded = Base64.decode(pubKeyPEM);
行中将密钥解码为二进制? - AaAX509EncodedKeySpec
的预期输入。 - cph2117