const rs = require('jsrsasign');

// 用户提供的 SM2 PKCS7 签名数据（没有头尾）
const sm2P7Base64 = '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';

const parser = new rs.KJUR.asn1.cms.CMSParser();
const p7 = parser.getCMSSignedData(rs.b64tohex(sm2P7Base64));

console.log('=== 调试 SM2 证书提取 ===');
console.log('p7 keys:', Object.keys(p7));
console.log('p7.certs:', p7.certs);
console.log('p7.sinfos:', p7.sinfos);

// 尝试直接解析证书
console.log('\n=== 直接解析证书 ===');
try {
    // 从 hex 中提取证书
    const hex = rs.b64tohex(sm2P7Base64);
    console.log('hex length:', hex.length);
    
    // 使用 ASN1HEX 解析
    const hCert = rs.ASN1HEX.getTLVbyList(hex, 0, [0, 3, 0, 0]);
    console.log('hCert:', hCert ? hCert.substring(0, 50) + '...' : 'null');
    
    if (hCert) {
        const certPem = rs.KJUR.asn1.ASN1Util.getPEMStringFromHex(hCert, 'CERTIFICATE');
        console.log('certPem:', certPem.substring(0, 200));
        
        const x509 = new rs.X509();
        x509.readCertPEM(certPem);
        
        console.log('\n主题:', x509.getSubjectString());
        console.log('颁发者:', x509.getIssuerString());
    }
} catch (e) {
    console.error('错误:', e.message);
}