从文件加载RSA私钥时的InvalidKeySpecExeption [英] InvalidKeySpecExeption when loadding the RSA private key from file

问题描述

我正在尝试从java中的文件加载私钥。此密钥由ssh-agent生成。我实际上使用下面的代码：

I'm trying to load a private key from file in java. This key is generated by ssh-agent. I'm actually using the code below:

     public PrivateKey getPrivateKeyFromFile() {
    try {
        //String privateKey = readFileAsString(System.getProperty("user.dir")+"/clefs/"+privateKeyName);
        //byte[] encodePrivateKey = privateKey.getBytes();
        File filePrivateKey = new File(System.getProperty("user.dir")+"/clefs/"+privateKeyName);
        FileInputStream fis = new FileInputStream(System.getProperty("user.dir")+"/clefs/"+privateKeyName);
        byte[] encodePrivateKey = new byte[(int) filePrivateKey.length()];
        fis.read(encodePrivateKey);
        fis.close();

        java.security.KeyFactory keyFactory = java.security.KeyFactory.getInstance("RSA");
        PKCS8EncodedKeySpec privatekeySpec = new PKCS8EncodedKeySpec(encodePrivateKey);
        PrivateKey prikey = (PrivateKey) keyFactory.generatePrivate(privatekeySpec);
        return prikey;

    } catch (NoSuchAlgorithmException ne) {
        ne.printStackTrace();
    } catch (InvalidKeySpecException is) {
        is.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }

    return null;

}

但是它产生了这个例外：

But it generated this exception:

 java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: invalid key format
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:217)
at java.security.KeyFactory.generatePrivate(KeyFactory.java:372)
at com.nguyenkim.cea.signature.SignChallenge.getPrivateKeyFromFile(SignChallenge.java:53)
at com.nguyenkim.cea.signature.SignChallenge.main(SignChallenge.java:128)
 Caused by: java.security.InvalidKeyException: invalid key format
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:341)
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:367)
at sun.security.rsa.RSAPrivateCrtKeyImpl.<init>(RSAPrivateCrtKeyImpl.java:91)
at sun.security.rsa.RSAPrivateCrtKeyImpl.newKey(RSAPrivateCrtKeyImpl.java:75)
at sun.security.rsa.RSAKeyFactory.generatePrivate(RSAKeyFactory.java:316)
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:213)
... 3 more

这是私钥：

   -----BEGIN RSA PRIVATE KEY-----
  MIIEowIBAAKCAQEAszReSzBumVb9GR/f3ClgykWE4UsONan1Ywk/H4+Wbi4HpcwB
  8Lm9B+zJ94WdRtD8iQYmbUZFoHwFqTjRPtmQfFXcmxfuI7v64bg0csIw8hz1Af2r
  xo7HBUoVcrTG5k3YrIkjeni/vD9uK6OZ1/lb+/TIvoEp9za577GJxv1omQ6GX7kv
  baMe2GkfpJmrXnA706OEdyi3Ibdcng/V4lbJ9cm+TIBU2jLBqwEukwpL5VNghuQi
  3YfpGhnPDBEnh4h5euFs4DGs4FnCgb+00yCuEgJSPvO5HsTnGbwTtEUnkxjtg8vD
  plD7WenPsyiZqib/rLkNcpfEHKVC6G3QjEuO8QIDAQABAoIBAGliRoFY/fFW4og/
  .............................
  -----END RSA PRIVATE KEY-----

有什么建议吗？
谢谢。

Any suggestions? Thanks.

推荐答案

你确定它的RSA吗？你也确定密钥格式正确吗？

Are you sure its RSA ? also are you sure that the key is in the right format?

如果两个问题的答案都是肯定的，你可以尝试使用 bouncycastle lib

If the answer is yes to both questions you can try using bouncycastle lib

编辑：尝试删除这些行从钥匙：

EDIT : Try removing these rows from the key:

-----BEGIN RSA PRIVATE KEY-----
.............................
-----END RSA PRIVATE KEY-----

UPDATE：确保您的私钥是PKCS8格式，如果不是，您需要将其转换为< a href =https://stackoverflow.com/questions/3243018/how-to-load-rsa-private-key-from-file>这里

UPDATE : make sure that you private key is in PKCS8 format if not you need to convert it like here

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