Java 解释tpm工具tpm_getpubek输出

tpm_getpubek的输出形式如下：

1） 我很难理解如何使用它。我试图通过以下代码将其转换为java公钥对象：

byte[] derPublicKey = DatatypeConverter.parseHexBinary(keyBloc);
X509EncodedKeySpec x509publicKey = new X509EncodedKeySpec(derPublicKey);
KeyFactory factory = KeyFactory.getInstance("RSA");
PublicKey publicKey = factory.generatePublic(x509publicKey);

但这将返回以下错误：

java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: invalid key format
at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(RSAKeyFactory.java:205)
 [java]     at java.security.KeyFactory.generatePublic(KeyFactory.java:334)

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tpm_getpubek

以原始形式返回十六进制编码的公钥模数，而不是X509编码的blob。假设您将返回的数据保存到名为

keyBlock

（删除空格）的字符串中，您将生成如下公钥：

PublicKey pk = KeyFactory.getInstance("RSA").generatePublic(
    new RSAPublicKeySpec(new BigInteger(keyBlock, 16), new BigInteger("65537")));

PublicKey pk = KeyFactory.getInstance("RSA").generatePublic(
    new RSAPublicKeySpec(new BigInteger(keyBlock, 16), new BigInteger("65537")));