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/* * Copyright 2012-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. * A copy of the License is located at * * http://aws.amazon.com/apache2.0 * * or in the "license" file accompanying this file. This file is distributed * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either * express or implied. See the License for the specific language governing * permissions and limitations under the License. */ package com.amazonaws.auth; import static com.amazonaws.SDKGlobalConfiguration.ACCESS_KEY_ENV_VAR; import static com.amazonaws.SDKGlobalConfiguration.ALTERNATE_ACCESS_KEY_ENV_VAR; import static com.amazonaws.SDKGlobalConfiguration.ALTERNATE_SECRET_KEY_ENV_VAR; import static com.amazonaws.SDKGlobalConfiguration.AWS_SESSION_TOKEN_ENV_VAR; import static com.amazonaws.SDKGlobalConfiguration.SECRET_KEY_ENV_VAR; import com.amazonaws.SdkClientException; import com.amazonaws.util.StringUtils; /** * {@link AWSCredentialsProvider} implementation that provides credentials by looking at the: <code>AWS_ACCESS_KEY_ID</code> (or * <code>AWS_ACCESS_KEY</code>) and <code>AWS_SECRET_KEY</code> (or <code>AWS_SECRET_ACCESS_KEY</code>) environment variables. If * the <code>AWS_SESSION_TOKEN</code> environment variable is also set then temporary credentials will be used. */ public class EnvironmentVariableCredentialsProvider implements AWSCredentialsProvider { @Override public AWSCredentials getCredentials() { String accessKey = System.getenv(ACCESS_KEY_ENV_VAR); if (accessKey == null) { accessKey = System.getenv(ALTERNATE_ACCESS_KEY_ENV_VAR); } String secretKey = System.getenv(SECRET_KEY_ENV_VAR); if (secretKey == null) { secretKey = System.getenv(ALTERNATE_SECRET_KEY_ENV_VAR); } accessKey = StringUtils.trim(accessKey); secretKey = StringUtils.trim(secretKey); String sessionToken = StringUtils.trim(System.getenv(AWS_SESSION_TOKEN_ENV_VAR)); if (StringUtils.isNullOrEmpty(accessKey) || StringUtils.isNullOrEmpty(secretKey)) { throw new SdkClientException("Unable to load AWS credentials from environment variables " + "(" + ACCESS_KEY_ENV_VAR + " (or " + ALTERNATE_ACCESS_KEY_ENV_VAR + ") and " + SECRET_KEY_ENV_VAR + " (or " + ALTERNATE_SECRET_KEY_ENV_VAR + "))"); } return sessionToken == null ? new BasicAWSCredentials(accessKey, secretKey) : new BasicSessionCredentials(accessKey, secretKey, sessionToken); } @Override public void refresh() { } @Override public String toString() { return getClass().getSimpleName(); } }