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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';

// 转换为 hex
const sm2P7Hex = rs.hextorstr(rs.b64tohex(sm2P7Base64));

console.log('=== 使用 jsrsasign 测试 SM2 PKCS7 ===');
console.log('数据长度:', sm2P7Base64.length);

try {
    // 使用 CMSParser 解析
    const parser = new rs.KJUR.asn1.cms.CMSParser();
    const result = parser.getCMSSignedData(rs.b64tohex(sm2P7Base64));
    
    console.log('\n解析成功!');
    console.log('版本:', result.version);
    console.log('哈希算法:', result.hashalgs);
    console.log('内容类型:', result.econtent?.type);
    console.log('证书数量:', result.certs?.length);
    console.log('签名者数量:', result.sinfos?.length);
    
    if (result.sinfos && result.sinfos.length > 0) {
        const signer = result.sinfos[0];
        console.log('\n签名者信息:');
        console.log('  版本:', signer.version);
        console.log('  哈希算法:', signer.hashalg);
        console.log('  签名算法:', signer.sigalg);
        console.log('  签名值 (hex):', signer.sighex?.substring(0, 50) + '...');
    }
    
    if (result.certs && result.certs.length > 0) {
        console.log('\n证书信息:');
        const cert = result.certs[0];
        console.log('  证书 PEM:', cert.substring(0, 100) + '...');
    }
    
} catch (error) {
    console.error('\n解析失败:', error.message);
    console.error(error.stack);
}