Fix configuration failure with missing configuration file from AWS CLI.

s3/src/main/java/ch/cyberduck/core/sts/STSCredentialsConfigurator.java

@@ -34,6 +34,7 @@
 import org.apache.commons.lang3.StringUtils;
 import org.apache.log4j.Logger;
 
+import java.io.File;
 import java.util.Map;
 import java.util.Optional;
 import java.util.function.Predicate;
@@ -42,6 +43,7 @@
 import com.amazonaws.auth.AWSStaticCredentialsProvider;
 import com.amazonaws.auth.profile.ProfilesConfigFile;
 import com.amazonaws.auth.profile.internal.BasicProfile;
+import com.amazonaws.profile.path.AwsProfileFileLocationProvider;
 import com.amazonaws.regions.Regions;
 import com.amazonaws.services.securitytoken.AWSSecurityTokenService;
 import com.amazonaws.services.securitytoken.AWSSecurityTokenServiceClientBuilder;
@@ -70,8 +72,13 @@ public Credentials configure(final Host host) throws LoginFailureException, Logi
         if(log.isDebugEnabled()) {
             log.debug(String.format("Look for profile name %s in ~/.aws/credentials", profile));
         }
+        final File file = AwsProfileFileLocationProvider.DEFAULT_CREDENTIALS_LOCATION_PROVIDER.getLocation();
+        if(null == file) {
+            log.warn("Missing configuration file ~/.aws/ccredentials. Skip auto configuration");
+            return host.getCredentials();
+        }
         // Iterating all profiles on our own because AWSProfileCredentialsConfigurator does not support MFA tokens
-        final ProfilesConfigFile config = new ProfilesConfigFile();
+        final ProfilesConfigFile config = new ProfilesConfigFile(file);
         final Map<String, BasicProfile> profiles = config.getAllBasicProfiles();
         final Optional<Map.Entry<String, BasicProfile>> optional = profiles.entrySet().stream().filter(new Predicate<Map.Entry<String, BasicProfile>>() {
             @Override

s3/src/test/java/ch/cyberduck/core/sts/STSCredentialsConfiguratorTest.java

@@ -0,0 +1,30 @@
+package ch.cyberduck.core.sts;
+
+/*
+ * Copyright (c) 2002-2018 iterate GmbH. All rights reserved.
+ * https://cyberduck.io/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+import ch.cyberduck.core.DisabledPasswordCallback;
+import ch.cyberduck.core.Host;
+import ch.cyberduck.core.TestProtocol;
+
+import org.junit.Test;
+
+public class STSCredentialsConfiguratorTest {
+
+    @Test
+    public void testConfigure() throws Exception {
+        new STSCredentialsConfigurator(new DisabledPasswordCallback()).configure(new Host(new TestProtocol()));
+    }
+}