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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.security.tls;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.Optional;
/**
* Utility class for retrieving {@link TransportSecurityOptions} from the system.
*
* @author bjorncs
*/
public class TransportSecurityUtils {
public static final String CONFIG_FILE_ENVIRONMENT_VARIABLE = "VESPA_TLS_CONFIG_FILE";
public static final String INSECURE_MIXED_MODE_ENVIRONMENT_VARIABLE = "VESPA_TLS_INSECURE_MIXED_MODE";
public enum MixedMode {
PLAINTEXT_CLIENT_MIXED_SERVER("plaintext_client_mixed_server"),
TLS_CLIENT_MIXED_SERVER("tls_client_mixed_server");
final String configValue;
MixedMode(String configValue) {
this.configValue = configValue;
}
static MixedMode fromConfigValue(String configValue) {
return Arrays.stream(values())
.filter(v -> v.configValue.equals(configValue))
.findFirst()
.orElseThrow(() -> new IllegalArgumentException("Unknown value: " + configValue));
}
}
private TransportSecurityUtils() {}
public static boolean isTransportSecurityEnabled() {
return getConfigFile().isPresent();
}
public static boolean isInsecureMixedModeEnabled() {
return getInsecureMixedMode().isPresent();
}
public static Optional<MixedMode> getInsecureMixedMode() {
if (!isTransportSecurityEnabled()) return Optional.empty();
return getEnvironmentVariable(INSECURE_MIXED_MODE_ENVIRONMENT_VARIABLE)
.map(MixedMode::fromConfigValue);
}
public static Optional<Path> getConfigFile() {
return getEnvironmentVariable(CONFIG_FILE_ENVIRONMENT_VARIABLE).map(Paths::get);
}
public static Optional<TransportSecurityOptions> getOptions() {
return getConfigFile()
.map(TransportSecurityOptions::fromJsonFile);
}
private static Optional<String> getEnvironmentVariable(String environmentVariable) {
return Optional.ofNullable(System.getenv(environmentVariable))
.filter(var -> !var.isEmpty());
}
}
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