SecretsManager

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Load all the secrets into a dictionary

Cs.svg
var secretsManagerConfig = new AmazonSecretsManagerConfig()
{
    Profile = new Profile("MyProfile"),
    RegionEndpoint = RegionEndpoint.EUCentral1
};
var secretsManager = new AmazonSecretsManagerClient(secretsManagerConfig);

var request = new GetSecretValueRequest
{
    SecretId = "MySecretName"
};

var response = await secretsManager.GetSecretValueAsync(request);

var secret = JsonConvert.DeserializeObject<Dictionary<string, string>>(response.SecretString);

return secret;

Load .NET configuration from Secrets Manager

AmazonSecretsManagerConfigurationProvider.cs
public class AmazonSecretsManagerConfigurationProvider : ConfigurationProvider
{
    private readonly string secretName;

    public AmazonSecretsManagerConfigurationProvider(string secretName)
    {
        this.secretName = secretName;
    }

    public override void Load()
    {
        var secret = GetSecret();
        Data = JsonSerializer.Deserialize<Dictionary<string, string>>(secret)!;
    }

    private string GetSecret()
    {
        var request = new GetSecretValueRequest
        {
            SecretId = this.secretName
        };

        using (var client = new AmazonSecretsManagerClient())
        {
            var response = client.GetSecretValueAsync(request).Result;
            return response.SecretString;
        }
    }
}
AmazonSecretsManagerConfigurationSource.cs
public class AmazonSecretsManagerConfigurationSource : IConfigurationSource
{
    private readonly string secretName;

    public AmazonSecretsManagerConfigurationSource(string secretName)
    {
        this.secretName = secretName;
    }

    public IConfigurationProvider Build(IConfigurationBuilder builder)
    {
        return new AmazonSecretsManagerConfigurationProvider(this.secretName);
    }
}
ConfigurationBuilderExtensions.cs
public static class ConfigurationBuilderExtensions
{
    public static void AddAmazonSecretsManager(
        this IConfigurationBuilder configurationBuilder, string secretName)
    {
        var configurationSource = new AmazonSecretsManagerConfigurationSource(secretName);
        configurationBuilder.Add(configurationSource);
    }
}
Program.cs
builder.Configuration.AddAmazonSecretsManager("Secret name");

var secretValue = builder.Configuration["Secret key"];