Java 执行椭圆曲线加密时出现无效密钥异常

我在使用flexyprovider进行椭圆曲线加密时遇到了这个错误。我收到一个InvalidKeyException，但我不知道如何解决它：

Exception in thread "main" java.security.InvalidKeyException: Illegal key size
at javax.crypto.Cipher.checkCryptoPerm(Cipher.java:1024)
at javax.crypto.Cipher.init(Cipher.java:1345)
at javax.crypto.Cipher.init(Cipher.java:1282)
at ExampleECIES.main(ExampleECIES.java:43)

这是我的密码

public class ExampleECIES {

    public static void main(String[] args) throws Exception {

    Security.addProvider(new FlexiCoreProvider());
    Security.addProvider(new FlexiECProvider());

    KeyPairGenerator kpg = KeyPairGenerator.getInstance("ECIES", "FlexiEC");

    CurveParams ecParams = new BrainpoolP160r1();

    kpg.initialize(ecParams, new SecureRandom());
    KeyPair keyPair = kpg.generateKeyPair();
    PublicKey pubKey = keyPair.getPublic();
    PrivateKey privKey = keyPair.getPrivate();

    // Encrypt

    Cipher cipher = Cipher.getInstance("ECIES", "FlexiEC");

    IESParameterSpec iesParams = new IESParameterSpec("AES128_CBC",
        "HmacSHA1", null, null);
    System.out.println(iesParams);
    cipher.init(Cipher.ENCRYPT_MODE, pubKey, iesParams);

    String cleartextFile = "cleartext.txt";
    String ciphertextFile = "ciphertextECIES.txt";

    byte[] block = new byte[64];
    FileInputStream fis = new FileInputStream(cleartextFile);
    FileOutputStream fos = new FileOutputStream(ciphertextFile);
    CipherOutputStream cos = new CipherOutputStream(fos, cipher);

    int i;
    while ((i = fis.read(block)) != -1) {
        cos.write(block, 0, i);
    }
    cos.close();

    // Decrypt

    String cleartextAgainFile = "cleartextAgainECIES.txt";

    cipher.init(Cipher.DECRYPT_MODE, privKey, iesParams);

    fis = new FileInputStream(ciphertextFile);
    CipherInputStream cis = new CipherInputStream(fis, cipher);
    fos = new FileOutputStream(cleartextAgainFile);

    while ((i = cis.read(block)) != -1) {
        fos.write(block, 0, i);
    }
    fos.close();
    }

}

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有人能帮我吗？我使用的是JDK版本1.7.0_25。

我在看同一个示例时遇到了同样的问题。我用这个解决了它

根本原因：

默认JDK附带了一些密钥大小限制，将其限制为128。如果安全策略使用的密钥大小大于此值，则会引发异常

解决方案：

您需要使用Java加密扩展（JCE）策略文件修补JDK

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src:

奇怪；您的代码似乎与示例相同-您是否做了任何更改？请尝试安装

Java Cryptography Extension（JCE）Unlimited Strength辖区策略文件

文件以查看其是否有效。我不确定代码是否需要它，但请无论如何尝试。更新问题，如果你已经安装了它，它仍然无法工作。耶…这是相同的代码。。。我没有做任何改变。但是这个错误显示了。您是否将US_export_policy.jar和local_policy.jar放置在$JAVA_HOME/jre/lib/security/目录中？