将 Suprema Biostar C++ 代码转换为 C#

Question

我从 Suprema 那里得到了 Biostation T2，他们提供了一个用 C# 制作的包装 Dll，他们还提供了使用 VB6、VB.net、C++ 和 C# 的示例。大部分文档都是 C++ 的，我有很难尝试将该逻辑转换为 C#。我无法在 pastie.Mainly 中使用以下函数注册用户，因为我不确定 C# 和 C++ 中的逻辑是否匹配。

查看 C++ code for enrolling user and my C# attempt 馅饼

我在尝试读取或写入受保护内存时遇到错误，如此处捕获

这是他们提供的 link 个 SDK 示例 sdk samples in vc,c#,C++

Answer 1

我们无法使用您向我们展示的内容编译和测试您的代码。话虽这么说，并排比较 c++ 和 c#，我看到以下不一致之处：

C++有如下代码：

unsigned char* templateBuf = (unsigned char*)malloc( userHeader.numOfFinger * 2 * BS_TEMPLATE_SIZE );
int bufPos = 0;
for( int i = 0; i < userHeader.numOfFinger * 2; i++ )
{
    result = BS_ScanTemplate( handle, templateBuf + bufPos );
    bufPos += BS_TEMPLATE_SIZE;
}

此代码多次调用 BS_ScanTemplate 并将结果按顺序存储在字节数组中。您的代码执行以下操作：

    byte[] templateBuf = new byte[userHdr.numOfFinger * 2 * BS_TEMPLATE_SIZE];
    int bufPos = 0;
    for (int i = 0; i < userHdr.numOfFinger * 2; i++)
    {
        templateBuf = new byte[userHdr.numOfFinger * 2 * BS_TEMPLATE_SIZE * bufPos];
        result = BSSDK.BS_ScanTemplate(m_Handle, templateBuf);
        bufPos += BS_TEMPLATE_SIZE;
    }

此代码不是按顺序存储 BS_ScanTemplate 的结果，而是通过重新分配数组来丢弃前面每个调用的结果。也许你想要这样的东西：

    byte[] templateBuf = new byte[userHdr.numOfFinger * 2 * BS_TEMPLATE_SIZE];
    for (int i = 0, bufPos = 0; i < userHdr.numOfFinger * 2; i++)
    {
        byte[] singleBuf = new byte[BS_TEMPLATE_SIZE];
        result = BSSDK.BS_ScanTemplate(m_Handle, singleBuf);
        Array.Copy(singleBuf, 0, templateBuf, bufPos, singleBuf.Length);
        bufPos += singleBuf.Length;
    }

c++ 代码

for( int i = 0; i < userHeader.numOfFinger; i++ )
{
    userHeader.duress[i] = 0; // no duress finger
}

C# 代码：

    userHdr.duressMask = 0; // no duress finger

这是完全不同的。

C++ 代码做：

for( int i = 0; i < userHeader.numOfFinger * 2; i++ )
{
    if( i % 2 == 0 )
    {
        userHeader.fingerChecksum[i/2] = 0;
    }
    unsigned char* templateData = templateBuf + i * BS_TEMPLATE_SIZE;
    for( int j = 0; j < BS_TEMPLATE_SIZE; j++ )
    {
        userHeader.fingerChecksum[i/2] += templateData[j];
    }
}

C# 代码：

    for (int i = 0; i < userHdr.numOfFinger * 2; i++)
    {
        if (i % 2 == 0)
        {
            userHdr.checksum[i / 2] = 0;
        }
        byte[] templateData = templateBuf;
        for (int j = 0; j < 2000 - 1; j++)
        {
            userHdr.checksum[i / 2] += templateData[j];
        }
    }

如您所见，C++ 代码的循环次数是 C# 代码的两倍。 C# 代码可能应该是：

    for (int i = 0; i < userHdr.numOfFinger; i++)
    {
        if (i % 2 == 0)
        {
            userHdr.checksum[i / 2] = 0;
        }
        for (int j = 0; j < BS_TEMPLATE_SIZE; j++)
        {
            userHdr.checksum[i / 2] += templateBuf[i * BS_TEMPLATE_SIZE + j];
        }
    }

您没有在 pastie 中显示对 BS_EnrollUserBioStation2 的 c++ 调用，因此无法将其与 c# 调用进行比较。
userHdr.checksum = new ushort[] { 0 }; 看起来不对。不应该是 userHdr.checksum = new ushort[userHdr.numOfFinger];

因此我建议如下：

更新BSUserHdrEx如下：

    public const int BS_MAX_NAME_LEN = 32;
    public const int BS_MAX_PASSWORD_LEN = 16;

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
    public struct BSUserHdrEx
    {
        public static BSUserHdrEx CreateDefaultBSUserHdrEx()
        {
            var userHdr = new BSUserHdrEx();
            userHdr.name = new byte[BSSDK.BS_MAX_NAME_LEN + 1];
            userHdr.department = new byte[BSSDK.BS_MAX_NAME_LEN + 1];
            userHdr.password = new byte[BSSDK.BS_MAX_PASSWORD_LEN];
            userHdr.checksum = new ushort[5];
            return userHdr;
        }

        public uint ID;
        public ushort reserved1;
        public ushort adminLevel;
        public ushort securityLevel;
        public ushort statusMask; // internally used by BioStation
        public uint accessGroupMask;

        //char name[BS_MAX_NAME_LEN + 1];
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = BSSDK.BS_MAX_NAME_LEN + 1)]
        public byte[] name;

        //char department[BS_MAX_NAME_LEN + 1];
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = BSSDK.BS_MAX_NAME_LEN + 1)]
        public byte[] department;

        // char password[BS_MAX_PASSWORD_LEN + 1];
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = BSSDK.BS_MAX_PASSWORD_LEN + 1)]
        public byte[] password;

        public ushort numOfFinger;
        public ushort duressMask;

        //public ushort checksum[5];
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
        public ushort[] checksum;

        public ushort authMode;
        public ushort authLimitCount; // 0 for no limit
        public ushort reserved;
        public ushort timedAntiPassback; // in minutes. 0 for no limit
        public uint cardID; // 0 for not used
        public bool bypassCard;
        public bool disabled;
        public uint expireDateTime;
        public uint customID; //card Custom ID
        public int version; // card Info Version
        public uint startDateTime;
    };

更新btngetUserInfo_Click如下：

    private void btngetUserInfo_Click(object sender, EventArgs e)
    {
        int result;

        BSSDK.BSUserHdrEx userHdr = BSSDK.BSUserHdrEx.CreateDefaultBSUserHdrEx();
        userHdr.ID = 2; // 0 cannot be assigned as a user ID
        userHdr.startDateTime = 0; // no check for start date
        userHdr.expireDateTime = 0; // no check for expiry date
        userHdr.adminLevel = BSSDK.BS_USER_NORMAL;
        userHdr.securityLevel = BSSDK.BS_USER_SECURITY_DEFAULT;
        userHdr.authMode = BSSDK.BS_AUTH_MODE_DISABLED; // use the authentication mode of the device
        userHdr.accessGroupMask = 0xffff0201; // a member of Group 1 and Group 2;
        Encoding.UTF8.GetBytes("Madman").CopyTo(userHdr.name, 0);
        Encoding.UTF8.GetBytes("INC").CopyTo(userHdr.department, 0);
        Encoding.UTF8.GetBytes("").CopyTo(userHdr.password, 0);
        userHdr.password = Encoding.UTF8.GetBytes("");  // no password is enrolled. Password should be longer than 4 bytes.
        userHdr.numOfFinger = 2;
        byte[] templateBuf = new byte[userHdr.numOfFinger * 2 * BSSDK.BS_TEMPLATE_SIZE];
        for (int i = 0, bufPos = 0; i < userHdr.numOfFinger * 2; i++)
        {
            byte[] singleBuf = new byte[BSSDK.BS_TEMPLATE_SIZE];
            result = BSSDK.BS_ScanTemplate(m_Handle, singleBuf);
            Array.Copy(singleBuf, 0, templateBuf, bufPos, singleBuf.Length);
            bufPos += singleBuf.Length;
        }
        userHdr.duressMask = 0; // no duress finger

        for (int i = 0; i < userHdr.numOfFinger * 2; i++)
        {
            if (i % 2 == 0)
            {
                userHdr.checksum[i / 2] = 0;
            }
            // byte[] templateData = templateBuf;
            for (int j = 0; j < BSSDK.BS_TEMPLATE_SIZE; j++)
            {
                userHdr.checksum[i / 2] += templateBuf[i * BSSDK.BS_TEMPLATE_SIZE + j];
            }
        }

        // enroll the user
        result = BSSDK.BS_EnrollUserBioStation2(m_Handle, ref userHdr, templateBuf);
        if (result == (int)BSSDK.BS_RET_CODE.BS_SUCCESS)
        {
            MessageBox.Show("user " + userHdr.name.ToString() + " enrolled");
        }

更新

您正在编组的结构是 BSUserHdrEx。 BS_EnrollUserBioStation2不以此为论据。 BS_EnrollUserBioStation2 将 BS2UserHdr 作为参数（来源："BioStar SDK Manual V1.8.pdf" 第 158 页）。BSUserHdrEx 是 BS_EnrollUserEx 的参数。（第 129 页）。

BS_EnrollUserEx "Enrolls a user to BioStation. Maximum 5 fingers can be enrolled per user."
BS_EnrollUserBioStation2 "Enrolls a user to BioStation T2. Maximum 10 fingers per user."

要么改用前一个函数，要么使用后一个数据结构

将 Suprema Biostar C++ 代码转换为 C#

Converting Suprema Biostar C++ code to C#

c#

c++

pointers

biometrics