Studio 用户指南

上次更新日期 2025年3月25日

在编码自动化中使用双重身份验证

本教程演示如何添加为自动化生成双重身份验证代码的示例代码。以下是实施双重身份验证代码的方法：

将代码复制并粘贴到目标项目的 CS 文件中。
在项目中使用示例 NUPGK 文件。
选择使用示例 NUPKG 文件时，可以将双重身份验证添加为 XAML 文件中的活动。

提示：无论您选择将示例双重身份验证代码生成器集成到 CS 文件（用于编码自动化）还是 XAML 文件（用于低代码自动化）中，请记住，您可以在低代码自动化中调用编码自动化，反之亦然。有关混合自动化的更多信息，请访问创建混合自动化 - 结合编码工作流和低代码工作流。

将代码复制并粘贴到 CS 文件中

要在编码自动化中使用双重身份验证示例，您可以将以下示例代码复制并粘贴到目标项目中的 CS 文件中。

注意：示例代码每 30 秒生成一个新的身份验证代码。例如，如果在 3 点 45 分 27 秒生成身份验证代码，则该代码的可用时间为 3 秒。然后，系统会在 30 秒标记处生成新代码。

 [object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]using System;
using System.Collections.Generic;
using UiPath.CodedWorkflows;
using System.Security.Cryptography;

namespace GenerateTwoFactorAuthenticationCode
{
    public class Workflow : CodedWorkflow
    {
        [Workflow]
        public string Execute(string secretKey)
        {
            return AuthenticationCode(secretKey);
        }

        private string AuthenticationCode(string secret)
        {
            // Step 1: Decode the base32 secret key
            byte[] key = Base32Decode(secret);

            // Step 2: Calculate the time step (current time divided by 30 seconds)
            long unixTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
            long timeStep = unixTime / 30;

            // Step 3: Convert time step to byte array (8 bytes, big-endian)
            byte[] timeBytes = BitConverter.GetBytes(timeStep);
            if (BitConverter.IsLittleEndian)
                Array.Reverse(timeBytes);

            // Step 4: Generate HMAC-SHA1 hash using the time step as message and secret key
            using (HMACSHA1 hmac = new HMACSHA1(key))
            {
                byte[] hash = hmac.ComputeHash(timeBytes);

                // Step 5: Extract dynamic binary code (4 bytes) from the hash
                int offset = hash[hash.Length - 1] & 0x0F;
                int binaryCode = (hash[offset] & 0x7F) << 24
                               | (hash[offset + 1] & 0xFF) << 16
                               | (hash[offset + 2] & 0xFF) << 8
                               | (hash[offset + 3] & 0xFF);

                // Step 6: Modulo to get a 6-digit code
                int otp = binaryCode % 1_000_000;

                // Return the OTP as a zero-padded 6-digit string
                return otp.ToString("D6");
            }
        }

        // Base32 decoding function to get the byte array from the base32-encoded key
        private static byte[] Base32Decode(string base32)
        {
            // Decode Base32-encoded string to byte array
            const string base32Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
            int bitBuffer = 0;
            int bitBufferLen = 0;
            var result = new List<byte>();

            foreach (char c in base32.ToUpper())
            {
                if (c == '=') break;

                int index = base32Chars.IndexOf(c);
                if (index < 0) throw new ArgumentException("Invalid Base32 character");

                bitBuffer = (bitBuffer << 5) | index;
                bitBufferLen += 5;

                if (bitBufferLen >= 8)
                {
                    result.Add((byte)(bitBuffer >> (bitBufferLen - 8)));
                    bitBufferLen -= 8;
                }
            }

            return result.ToArray();
        }
    }
}

使用示例 NUPGK 文件

如果要使用示例 NUPKG 文件在自动化中包含双重代码，请按照以下步骤操作：

下载以下 NUPKG 文件：GenerateTwoFactorAuthenticationCode.nupkg。
将下载的 NUPKG 文件上传到 Orchestrator 主机或租户订阅源，您可通过 Studio 实例访问这些订阅源。
有关将 NUPKG 文件作为自定义库上传到 Orchestrator 的更多信息，请访问手动将库上传到 Orchestrator。
打开 Studio 项目，然后打开“管理包”菜单。
搜索您先前保存到 Orchestrator 主机或 Orchestrator 租户订阅源的 GenerateTwoFactorAuthenticationCode NUPKG 文件，并安装该文件。
图 1.“管理包”菜单中的自定义库