java 国密p7验签_go/Java 国密sm2签名验签

您好，您的问题似乎有些不明确。您是想了解如何在 Java 或 Go 中使用国密 SM2 算法进行签名和验签，或是想了解如何进行 P7 格式的签名和验签吗？以下是两个问题的回答：

1. 如何在 Java 或 Go 中使用国密 SM2 算法进行签名和验签？

在 Java 中使用国密 SM2 算法进行签名和验签，您可以使用 BouncyCastle 库。具体实现可以参考下面的代码：

Java：

// 加载 BouncyCastle Provider
Security.addProvider(new BouncyCastleProvider());

// 生成密钥对
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC", "BC");
ECGenParameterSpec ecGenParameterSpec = new ECGenParameterSpec("sm2p256v1");
keyPairGenerator.initialize(ecGenParameterSpec, new SecureRandom());
KeyPair keyPair = keyPairGenerator.generateKeyPair();

// 获取私钥和公钥
PrivateKey privateKey = keyPair.getPrivate();
PublicKey publicKey = keyPair.getPublic();

// 签名
Signature signature = Signature.getInstance("SM3withSM2", "BC");
signature.initSign(privateKey);
signature.update(data);
byte[] signatureBytes = signature.sign();

// 验签
signature.initVerify(publicKey);
signature.update(data);
boolean verifyResult = signature.verify(signatureBytes);

Go：

// 生成密钥对
privateKey, err := sm2.GenerateKey()
if err != nil {
    log.Fatal(err)
}
publicKey := &privateKey.PublicKey

// 签名
hash := sm3.SumSM3(data)
signature, err := privateKey.Sign(rand.Reader, hash[:], nil)
if err != nil {
    log.Fatal(err)
}

// 验签
verifyResult := publicKey.Verify(hash[:], signature)

2. 如何进行 P7 格式的签名和验签？

在 Java 中进行 P7 格式的签名和验签，您可以使用 BouncyCastle 库。具体实现可以参考下面的代码：

Java：

// 加载 BouncyCastle Provider
Security.addProvider(new BouncyCastleProvider());

// 读取证书和私钥
KeyStore keyStore = KeyStore.getInstance("PKCS12");
keyStore.load(new FileInputStream("keystore.p12"), "password".toCharArray());
PrivateKey privateKey = (PrivateKey) keyStore.getKey("alias", "password".toCharArray());
Certificate[] certChain = keyStore.getCertificateChain("alias");
X509Certificate cert = (X509Certificate) certChain[0];

// 加载证书链
JcaCertStore jcaCertStore = new JcaCertStore(Arrays.asList(certChain));

// 签名
ContentSigner signer = new JcaContentSignerBuilder("SM3withSM2").setProvider("BC").build(privateKey);
CMSTypedData cmsData = new CMSProcessableByteArray(data);
CMSSignedDataGenerator generator = new CMSSignedDataGenerator();
generator.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(new JcaDigestCalculatorProviderBuilder().build()).build(signer, cert));
generator.addCertificates(jcaCertStore);
CMSSignedData signedData = generator.generate(cmsData, true);
byte[] signedBytes = signedData.getEncoded();

// 验签
CMSSignedData cms = new CMSSignedData(signedBytes);
SignerInformationStore signers = cms.getSignerInfos();
Collection<SignerInformation> c = signers.getSigners();
Iterator<SignerInformation> it = c.iterator();
if (it.hasNext()) {
    SignerInformation signer = it.next();
    X509CertificateHolder certHolder = (X509CertificateHolder) cms.getCertificates().getMatches(signer.getSID()).iterator().next();
    if (signer.verify(new JcaSimpleSignerInfoVerifierBuilder().build(certHolder))) {
        return true;
    }
}
return false;

Go：

// 读取证书和私钥
pemData, err := ioutil.ReadFile("keystore.pem")
if err != nil {
    log.Fatal(err)
}
blocks := pem.Decode(pemData)
key, err := x509.ParsePKCS8PrivateKey(blocks.Bytes)
if err != nil {
    log.Fatal(err)
}
certData, err := ioutil.ReadFile("cert.pem")
if err != nil {
    log.Fatal(err)
}
cert, err := x509.ParseCertificate(certData)
if err != nil {
    log.Fatal(err)
}

// 加载证书链
certs := []*x509.Certificate{cert}
intermediateData, err := ioutil.ReadFile("intermediate.pem")
if err == nil {
    for {
        blocks := pem.Decode(intermediateData)
        if blocks == nil {
            break
        }
        intermediateCert, err := x509.ParseCertificate(blocks.Bytes)
        if err != nil {
            log.Fatal(err)
        }
        certs = append(certs, intermediateCert)
    }
}

// 签名
hash := sm3.SumSM3(data)
signedData, err := cms.NewSignedData(hash[:], key, cert, certs...)
if err != nil {
    log.Fatal(err)
}
signedBytes, err := signedData.ToDER()
if err != nil {
    log.Fatal(err)
}

// 验签
cms, err := cms.ParseCMS(signedBytes)
if err != nil {
    log.Fatal(err)
}
signerInfos := cms.GetSignerInfos()
for _, signerInfo := range signerInfos {
    err = signerInfo.Verify(cert)
    if err == nil {
        return true
    }
}
return false