using System;
using System.Threading.Tasks;
using Azure.Identity;
using Azure.Security.KeyVault.Secrets;
using Azure.Core;
using System.Diagnostics; // Required for Process.Start
public class KeyVaultExample
{
public static async Task Main(string[] args)
{
// Check for required arguments. The program expects two arguments:
// -KeyVaultName <your_key_vault_name>
// -SecretName <your_secret_name>
if (args.Length != 2)
{
Console.WriteLine("Usage: dotnet run -- -KeyVaultName <keyVaultName> -SecretName <secretName>");
return; // Exit the program if the arguments are not provided correctly.
}
string keyVaultName = "";
string secretName = "";
// Parse command-line arguments. This loop iterates through the arguments
// and extracts the values for -KeyVaultName and -SecretName.
for (int i = 0; i < args.Length; i++)
{
if (args[i] == "-KeyVaultName")
{
if (i + 1 < args.Length)
{
keyVaultName = args[i + 1];
i++; // Skip the next argument since it's the value of -KeyVaultName
}
else
{
Console.WriteLine("-KeyVaultName parameter requires a value.");
return; // Exit if the parameter is present but the value is missing.
}
}
else if (args[i] == "-SecretName")
{
if (i + 1 < args.Length)
{
secretName = args[i + 1];
i++; // Skip the next argument since it's the value of -SecretName
}
else
{
Console.WriteLine("-SecretName parameter requires a value.");
return; // Exit if the parameter is present but the value is missing.
}
}
else
{
Console.WriteLine($"Unknown parameter: {args[i]}");
return; // Exit if an unknown parameter is encountered.
}
}
// Check if the required values were provided
if (string.IsNullOrEmpty(keyVaultName))
{
Console.WriteLine("-KeyVaultName is required.");
return;
}
if (string.IsNullOrEmpty(secretName))
{
Console.WriteLine("-SecretName is required.");
return;
}
try
{
// Connect to Azure with default credentials. DefaultAzureCredential automatically
// tries to authenticate using various methods, such as:
// - Environment variables
// - Azure CLI
// - Managed identity (if running in Azure)
var credential = new DefaultAzureCredential();
// Construct the Key Vault URL. This URL is used to access your Key Vault.
var keyVaultUrl = new Uri($"https://{keyVaultName}.vault.azure.net");
// Create a SecretClient. The SecretClient is used to interact with the secrets
// in your Key Vault. It takes the Key Vault URL and the credentials.
var client = new SecretClient(keyVaultUrl, credential);
Console.WriteLine($"Retrieving secret '{secretName}' from Key Vault '{keyVaultName}'...");
// Get the secret. This line retrieves the secret from Key Vault using the
// SecretClient. The GetSecretAsync method is asynchronous, so we use 'await'.
KeyVaultSecret secret = await client.GetSecretAsync(secretName);
string secretValue = secret.Value; // Extract the secret value.
Console.WriteLine("Successfully retrieved secret.");
// Use the secret to get host details (replace with your actual command).
Console.WriteLine("Using secret to get host details (simulated)...");
// *** IMPORTANT: Replace this with your actual command to get host details. ***
// This is just a simulation using the secret. The actual command will depend
// on your environment and what you are trying to achieve (e.g., connecting to
// a remote server, calling an API, etc.).
//
// Example 1: Using System.Diagnostics.Process to run a command (e.g., ssh)
//
// ProcessStartInfo startInfo = new ProcessStartInfo
// {
// FileName = "ssh", // Or "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe" for PowerShell
// Arguments = $"-o StrictHostKeyChecking=no user@your-hostname your_command", // Add any necessary arguments
// RedirectStandardInput = true,
// RedirectStandardOutput = true,
// RedirectStandardError = true,
// UseShellExecute = false,
// CreateNoWindow = true, // May want to set this to false to see output.
// //Password = secretValue // NEVER store the secret directly in the process start info. Bad practice.
// };
//
// using (Process process = new Process { StartInfo = startInfo })
// {
// process.Start();
//
// // If you need to provide a password, do it via standard input:
// // if (startInfo.FileName.Contains("ssh")) // Example: Only if it's SSH
// // {
// // process.StandardInput.WriteLine(secretValue);
// // process.StandardInput.Close();
// // }
//
// string output = process.StandardOutput.ReadToEnd();
// string error = process.StandardError.ReadToEnd();
// process.WaitForExit();
//
// if (process.ExitCode != 0)
// {
// Console.WriteLine($"Error: {error}");
// Console.WriteLine($"Command exited with code {process.ExitCode}");
// }
// else
// {
// Console.WriteLine(output);
// }
// }
//
// Example 2: Calling a REST API (requires a library like System.Net.Http)
//
// using (var client = new HttpClient())
// {
// client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", secretValue); // Or "Basic", etc.
// var response = await client.GetAsync("https://your-api-endpoint");
// response.EnsureSuccessStatusCode();
// string result = await response.Content.ReadAsStringAsync();
// Console.WriteLine(result);
// }
//
// For this simulation, we'll just output the secret length and a message:
//
int secretLength = secretValue.Length;
Console.WriteLine($"Simulated host details retrieval using secret (length: {secretLength}).");
Console.WriteLine($"Secret Value (First 6 Characters): {secretValue.Substring(0, Math.Min(6, secretLength))}...");
Console.WriteLine("Note: This is a simulation. You must replace this with your actual command.");
// End of simulation. Replace this with your real code.
Console.WriteLine("Successfully (simulated) retrieved host details.");
}
catch (Exception ex)
{
Console.WriteLine($"An error occurred: {ex.Message}");
return; // Exit the program if an error occurs.
}
Console.WriteLine("Script completed."); // Indicate successful completion.
}
}
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