Java 基于BC库实现p10证书请求文件校验

要基于BC库实现P10证书请求文件的校验，可以按照以下步骤进行操作：

1. 导入所需的BC库依赖。在pom.xml文件中添加以下依赖项：

<dependencies>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-jdk15on</artifactId>
        <version>1.66</version>
    </dependency>
</dependencies>

2. 编写校验代码。以下是一个示例代码，用于校验P10证书请求文件：

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.pkcs.CertificationRequest;
import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.cert.jcajce.JcaX509CertificateConverter;
import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.operator.ContentVerifierProvider;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.operator.jcajce.JcaContentVerifierProviderBuilder;

import java.io.FileInputStream;
import java.security.Security;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;

public class P10RequestValidator {

    public static void main(String[] args) throws Exception {
        // 添加BC库提供商
        Security.addProvider(new BouncyCastleProvider());

        // 读取P10证书请求文件
        FileInputStream fis = new FileInputStream("p10request.csr");
        byte[] p10Data = new byte[fis.available()];
        fis.read(p10Data);
        fis.close();

        // 解析P10证书请求文件
        CertificationRequest certReq = CertificationRequest.getInstance(p10Data);
        X500Name subject = certReq.getCertificationRequestInfo().getSubject();
        SubjectPublicKeyInfo publicKeyInfo = certReq.getCertificationRequestInfo().getSubjectPublicKeyInfo();

        // 获取公钥
        // 这里可以将公钥与预期的公钥进行比较，以确保请求文件的合法性
        // 例如，可以通过比较公钥的哈希值来判断是否为预期的公钥
        byte[] publicKeyBytes = publicKeyInfo.getEncoded();

        // 获取签名算法标识符
        ASN1ObjectIdentifier sigAlgOID = certReq.getSignatureAlgorithm().getAlgorithm();

        // 读取证书
        FileInputStream certFile = new FileInputStream("certificate.crt");
        Certificate certificate = new JcaX509CertificateConverter().getCertificate(certFile);
        certFile.close();

        // 验证证书请求文件的签名
        JcaContentVerifierProviderBuilder verifierBuilder = new JcaContentVerifierProviderBuilder();
        ContentVerifierProvider verifierProvider = verifierBuilder.build(certificate.getPublicKey());
        boolean verified = certReq.isSignatureValid(verifierProvider);

        if (verified) {
            System.out.println("证书请求文件校验通过");
        } else {
            System.out.println("证书请求文件校验失败");
        }
    }
}

请注意，这只是一个基本示例，可能需要根据实际需求进行修改和扩展。