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CSHARP-4463: Add aws auth connectivity examples. (#1004)
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/* Copyright 2010-present MongoDB Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using MongoDB.Bson;
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using MongoDB.TestHelpers.XunitExtensions;
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using Xunit;
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namespace MongoDB.Driver.Examples.Aws
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{
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/// <summary>
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/// Atlas preconditions for local run:
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/// 1. Configure AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and optionally AWS_SESSION_TOKEN. If used, AWS_SESSION_TOKEN should be regenerated periodically.
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/// You may use `Command line or programmatic access` page on awsapps.com
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/// 2. Configure credentials folder here: c:\Users\{user}\.aws\
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/// 3. Get your arn via `get-caller-identity`:
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/// ./aws sts get-caller-identity
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///{
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/// "UserId": "%ID%:[[email protected]]",
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/// "Account": "%ID_VALUE%",
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/// "Arn": "arn:aws:sts::%ID_VALUE%:assumed-role/%ROLE_NAME%/[[email protected]]"
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/// }
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/// pay attention on %ROLE_NAME%.
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/// 4. list all roles via:.
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/// $ ./aws iam list-roles
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/// {
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/// "Roles": [
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/// {
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/// "Path": "..",
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/// "RoleName": "%ROLE_NAME%",
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/// "Arn": "arn:aws...:
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/// ...
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/// in the provided roles, search for a record with a RoleName equal to %ROLE_NAME% and record his arn.
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/// 5. In your atlas cluster, create a new user with AWS authentication and set AWS IAM Role ARN from #4.
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/// 6. Then configure a MongoClient in the same way as it's done in these examples with MONGODB-AWS auth credentials.
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///
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/// Additional notes:
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/// 1. To work with authentications that are not based on env vars credentials configuration, make sure that AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY and AWS_SESSION_TOKEN are not set
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/// 2. To work with aws profile make sure that env variable AWS_PROFILE has appropriate value if the used aws profile is not default
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/// 3. To work with ECS container credentials make sure that AWS_CONTAINER_CREDENTIALS_RELATIVE_URI or AWS_CONTAINER_CREDENTIALS_FULL_URI has appropriate value
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/// 4. To work with EC2 container credentials from EC2 instance metadata make sure a test is launched on EC2 env and AWS_CONTAINER_CREDENTIALS_* is not set
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/// 5. To work with Aws WebIdentityToken make sure that AWS_WEB_IDENTITY_TOKEN_FILE, AWS_ROLE_ARN and AWS_ROLE_SESSION_NAME are configured
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/// </summary>
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public class AwsAuthenticationExamples
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{
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private static readonly string __connectionStringHosts = "<host_address>";
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[Fact]
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public void ConnectionStringAuthConfiguration()
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{
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// the test uses env variables only to initialize userName, password and awsSessionToken
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RequireEnvironment
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.Check()
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.EnvironmentVariable("AWS_ACCESS_KEY_ID")
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.EnvironmentVariable("AWS_SECRET_ACCESS_KEY")
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.EnvironmentVariable("AWS_SESSION_TOKEN");
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// Start explicit aws credentials configuring via connection string
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var username = Environment.GetEnvironmentVariable("AWS_ACCESS_KEY_ID");
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var password = Environment.GetEnvironmentVariable("AWS_SECRET_ACCESS_KEY");
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var awsSessionToken = Environment.GetEnvironmentVariable("AWS_SESSION_TOKEN");
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// AWS_SESSION_TOKEN is optional. If you do not need to specify an AWS session token, omit the authMechanismProperties parameter and his value.
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var connectionString = $"mongodb+srv://{username}:{password}@{__connectionStringHosts}?authSource=$external&authMechanism=MONGODB-AWS&authMechanismProperties=AWS_SESSION_TOKEN:{awsSessionToken}";
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var mongoClientSettings = MongoClientSettings.FromConnectionString(connectionString);
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var client = new MongoClient(mongoClientSettings);
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// End explicit aws credentials configuring via connection string
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RunHello(client);
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}
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[Fact]
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public void ConnectionStringAuthConfiguration_with_auto_fetching_env_variables()
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{
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// the test uses env variables fetched inside the driver behind the scene.
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// Auto fetching can happen not only from env variables, but adding only a check for them as a simplest guard
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RequireEnvironment
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.Check()
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.EnvironmentVariable("AWS_ACCESS_KEY_ID")
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.EnvironmentVariable("AWS_SECRET_ACCESS_KEY")
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.EnvironmentVariable("AWS_SESSION_TOKEN"); // optional
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// Start aws authentication configuring via connection string with implicit credentials fetching
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var connectionString = $"mongodb+srv://{__connectionStringHosts}?authSource=$external&authMechanism=MONGODB-AWS";
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var mongoClientSettings = MongoClientSettings.FromConnectionString(connectionString);
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var client = new MongoClient(mongoClientSettings);
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// End aws authentication configuring via connection string with implicit credentials fetching
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RunHello(client);
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}
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[Fact]
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public void MongoClientSettingsAuthConfiguration()
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{
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// the test uses env variable only to initialize userName, password and awsSessionToken
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RequireEnvironment
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.Check()
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.EnvironmentVariable("AWS_ACCESS_KEY_ID")
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.EnvironmentVariable("AWS_SECRET_ACCESS_KEY")
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.EnvironmentVariable("AWS_SESSION_TOKEN");
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// Start explicit aws credentials configuring via MongoCredential
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var username = Environment.GetEnvironmentVariable("AWS_ACCESS_KEY_ID");
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var password = Environment.GetEnvironmentVariable("AWS_SECRET_ACCESS_KEY");
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var awsSessionToken = Environment.GetEnvironmentVariable("AWS_SESSION_TOKEN");
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// AWS_SESSION_TOKEN is optional. If you do not need to specify an AWS session token, omit calling WithMechanismProperty method.
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var awsCredentials = new MongoCredential("MONGODB-AWS", new MongoExternalIdentity(username), new PasswordEvidence(password))
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.WithMechanismProperty("AWS_SESSION_TOKEN", awsSessionToken);
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var mongoClientSettings = MongoClientSettings.FromConnectionString($"mongodb+srv://{username}:{password}@{__connectionStringHosts}");
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mongoClientSettings.Credential = awsCredentials;
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mongoClientSettings.ServerApi = new ServerApi(ServerApiVersion.V1, strict: true);
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var client = new MongoClient(mongoClientSettings);
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// End explicit aws credentials configuring via MongoCredential
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RunHello(client);
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}
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[Fact]
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public void MongoClientSettingsAuthConfiguration_with_auto_fetching_env_variables()
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{
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// the test uses env variables fetched inside the driver behind the scene.
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// Auto fetching can happen not only from env variables, but adding only a check for them as a simplest guard
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RequireEnvironment
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.Check()
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.EnvironmentVariable("AWS_ACCESS_KEY_ID")
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.EnvironmentVariable("AWS_SECRET_ACCESS_KEY")
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.EnvironmentVariable("AWS_SESSION_TOKEN"); // optional
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// Start aws authentication configuring via MongoClientSettings with implicit credentials fetching
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var awsCredentials = new MongoCredential("MONGODB-AWS", new MongoExternalAwsIdentity(), new ExternalEvidence());
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var mongoClientSettings = MongoClientSettings.FromConnectionString($"mongodb+srv://{__connectionStringHosts}");
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mongoClientSettings.Credential = awsCredentials;
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mongoClientSettings.ServerApi = new ServerApi(ServerApiVersion.V1, strict: true);
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var client = new MongoClient(mongoClientSettings);
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// End aws authentication configuring via MongoClientSettings with implicit credentials fetching
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RunHello(client);
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}
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// private methods
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private void RunHello(IMongoClient client)
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{
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client.GetDatabase(DatabaseNamespace.Admin.DatabaseName).RunCommand<BsonDocument>("{ hello : 1 }");
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}
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}
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}

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