Java语言安全Java 8上的InvalidAlgorithmParameterException可用于Java 11

Question

所以，假设您想使用公钥验证签名，该公钥使用ECDSA算法和brainpoolP256r1椭圆曲线。

要运行以下代码，请执行以下步骤：

1. 使用以下命令生成脑池密钥对：

openssl ecparam -name brainpoolP256r1 -genkey -noout -out ec-brainpoolP256r1-priv-key.pem
openssl ec -in ec-brainpoolP256r1-priv-key.pem -pubout > ec-brainpoolP256r1-pub-key.pem
openssl pkcs8 -topk8 -nocrypt -in ec-brainpoolP256r1-priv-key.pem -out ec-brainpoolP256r1-priv-key-pkcs8.pem (to read it with tomitribe PEM utility, we need the PKCS8 format)

package com.test.ecdsa;

import org.tomitribe.auth.signatures.PEM;

import java.io.ByteArrayInputStream;
import java.nio.charset.StandardCharsets;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;

public class Main {
    public static void main(String[] args) throws Exception {
        String privateKeyPem = "[use here the content from ec-brainpoolP256r1-priv-key-pkcs8.pem]";

        Signature signer = Signature.getInstance("SHA256withECDSA");
        PrivateKey privateKey = PEM.readPrivateKey(new ByteArrayInputStream(privateKeyPem.getBytes(StandardCharsets.UTF_8)));

        signer.initSign(privateKey);
        signer.update("testMessage".getBytes(StandardCharsets.UTF_8));
        byte[] signature = signer.sign();

        String publicKeyPem = "[use here the content from ec-brainpoolP256r1-pub-key.pem]";

        PublicKey publicKey = PEM.readPublicKey(new ByteArrayInputStream(publicKeyPem.getBytes(StandardCharsets.UTF_8)));
        Signature signatureVerifier = Signature.getInstance("SHA256withECDSA");
        signatureVerifier.initVerify(publicKey);
        signatureVerifier.update("testMessage".getBytes(StandardCharsets.UTF_8));

        boolean result = signatureVerifier.verify(signature);

        System.out.println(result);
    }
}

在java 8上运行此代码将导致：

Exception in thread "main" java.security.SignatureException: Could not sign data
    at sun.security.ec.ECDSASignature.signDigestNative(ECDSASignature.java:367)
    at sun.security.ec.ECDSASignature.engineSign(ECDSASignature.java:386)
    at java.security.Signature$Delegate.engineSign(Signature.java:1382)
    at java.security.Signature.sign(Signature.java:698)
    at com.ing.obp.jws.lib.Main.main(Main.java:29)
Caused by: java.security.InvalidAlgorithmParameterException
    at sun.security.ec.ECDSASignature.signDigest(Native Method)
    at sun.security.ec.ECDSASignature.signDigestNative(ECDSASignature.java:364)
    ... 4 more

使用java 11，控制台将打印“true”。

那是为什么呢？

Answer 1

java 11中添加了Brainpool和其他ECC支持（自java 7以来不可用，我发现这个链接非常有趣：https://bugs.openjdk.java.net/browse/JDK-7007966)

如果您仍然想使用java 8来读取密钥、签名、验证签名，那么您将需要BouncyCastleProvider。

Maven依赖：

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcpkix-jdk15on</artifactId>
    <version>1.70</version>
</dependency>

要使用它，您可以将提供程序注册到java的安全层，然后使用BouncyCastleProvider.PROVIDER_NAME在Signature.get实例中引用它。

像这样：

...
import org.bouncycastle.jce.provider.BouncyCastleProvider;
...
public class Main {
    static {
        Security.addProvider(new BouncyCastleProvider());
    }
...
        Signature signer = Signature.getInstance("SHA256withECDSA", BouncyCastleProvider.PROVIDER_NAME);
...
        Signature signatureVerifier = Signature.getInstance("SHA256withECDSA", BouncyCastleProvider.PROVIDER_NAME);
...
}