tencent cloud

unsigned char pInBuf[512]={0};
    xel::byte_writer bw(pInBuf, sizeof(pInBuf));

    char cVer = 1;
    unsigned short wOpenIDLen = (unsigned short)strlen((const char *)strOpenID);
        if (wOpenIDLen > 127) wOpenIDLen = 127;
    unsigned short wRoomIDLen = (unsigned short)strlen((const char *)strRoomID);
        if (wRoomIDLen > 127) wRoomIDLen = 127;

    bw.write_byte(cVer);
    bw.write_int16(wOpenIDLen);
    bw.write_bytes(strOpenID, wOpenIDLen);
    bw.write_int32(dwSdkAppId);
    bw.write_int32(0 /*dwRoomID*/);
    bw.write_int32(expTime);
    bw.write_int32(nAuthBits);
    bw.write_int32(0 /*dwAccountType*/);
    bw.write_int16(wRoomIDLen);
    bw.write_bytes(strRoomID, wRoomIDLen);

    int pInLen = bw.bytes_write();

        unsigned char pEncryptOutBuf[512] = { 0 };
    int iEncrptyLen = 0;

        symmetry_encrypt((const unsigned char*)pInBuf, pInLen, (const unsigned char*)key, (unsigned char*)pEncryptOutBuf, &iEncrptyLen);