const rs = require('jsrsasign');
const sm2 = require('sm-crypto').sm2;
const sm3 = require('sm-crypto').sm3;

// 用户提供的 SM2 PKCS7 签名数据
const sm2P7Base64 = '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';

// 测试用的原始数据
const mockOriginalData = 'QDJNHHVB_FWQ';

console.log('=== 调试 SM2 PKCS7 验证 ===');
console.log('原始数据:', mockOriginalData);

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

console.log('\nPKCS7 信息:');
console.log('版本:', p7.version);
console.log('哈希算法:', p7.hashalgs);
console.log('签名者数量:', p7.sinfos ? p7.sinfos.length : 0);

if (p7.sinfos && p7.sinfos.length > 0) {
    const signer = p7.sinfos[0];
    console.log('\n签名者信息:');
    console.log('  签名算法:', signer.sigalg);
    console.log('  签名值 (hex):', signer.sighex);
    console.log('  签名值长度:', signer.sighex ? signer.sighex.length / 2 : 0, '字节');
}

// 提取原始数据（econtent）
if (p7.econtent && p7.econtent.hex) {
    const extractedData = Buffer.from(p7.econtent.hex, 'hex').toString();
    console.log('\n从 PKCS7 提取的原始数据:', extractedData);
    console.log('与提供的原始数据匹配:', extractedData === mockOriginalData);
}

// 提取公钥
if (p7.certs && p7.certs.array && p7.certs.array.length > 0) {
    const certPem = p7.certs.array[0];
    const certHex = rs.pemtohex(certPem);
    const tbsCert = rs.ASN1HEX.getTLVbyList(certHex, 0, [0]);
    const spki = rs.ASN1HEX.getTLVbyList(tbsCert, 0, [6]);
    const publicKeyBitString = rs.ASN1HEX.getTLVbyList(spki, 0, [1]);
    const publicKeyHex = publicKeyBitString.substring(6);
    
    console.log('\n公钥信息:');
    console.log('  公钥 (hex):', publicKeyHex.substring(0, 50) + '...');
    console.log('  公钥长度:', publicKeyHex.length / 2, '字节');
    
    // 尝试验证签名
    if (p7.sinfos && p7.sinfos.length > 0) {
        const signer = p7.sinfos[0];
        
        // 计算 SM3 哈希
        const hash = sm3(mockOriginalData);
        console.log('\nSM3 哈希:', hash);
        
        // 尝试验证
        console.log('\n尝试使用 sm-crypto 验证:');
        try {
            // sm-crypto 的 doVerify 需要 hash 和公钥
            // 注意：sm-crypto 的 API 可能需要不同的格式
            const result = sm2.doVerify(hash, signer.sighex, publicKeyHex);
            console.log('验证结果:', result);
        } catch (e) {
            console.error('验证错误:', e.message);
            
            // 尝试其他格式
            console.log('\n尝试其他格式...');
            try {
                // 可能需要去掉 04 前缀
                const pubKeyWithoutPrefix = publicKeyHex.substring(2);
                const result = sm2.doVerify(hash, signer.sighex, pubKeyWithoutPrefix);
                console.log('验证结果 (去掉前缀):', result);
            } catch (e2) {
                console.error('验证错误 (去掉前缀):', e2.message);
            }
        }
    }
}