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SSLConfig.java
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SSLConfig.java
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/*
* Copyright 2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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 io.r2dbc.postgresql.client;
import io.netty.handler.ssl.SslContext;
import io.r2dbc.postgresql.util.Assert;
import reactor.util.annotation.Nullable;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLEngine;
import javax.net.ssl.SSLParameters;
import java.net.SocketAddress;
import java.util.function.Function;
import java.util.function.Supplier;
public final class SSLConfig {
@Nullable
private final HostnameVerifier hostnameVerifier;
private final SSLMode sslMode;
@Nullable
private final Supplier<SslContext> sslProvider;
private final Function<SSLEngine, SSLEngine> sslEngineCustomizer;
private final Function<SocketAddress, SSLParameters> sslParametersFactory;
public SSLConfig(SSLMode sslMode, @Nullable Supplier<SslContext> sslProvider, @Nullable HostnameVerifier hostnameVerifier) {
this(sslMode, sslProvider, Function.identity(), it -> new SSLParameters(), hostnameVerifier);
}
public SSLConfig(SSLMode sslMode, @Nullable Supplier<SslContext> sslProvider, Function<SSLEngine, SSLEngine> sslEngineCustomizer, Function<SocketAddress, SSLParameters> sslParametersFactory,
@Nullable HostnameVerifier hostnameVerifier) {
if (sslMode != SSLMode.DISABLE) {
Assert.requireNonNull(sslProvider, "SslContext provider is required for ssl mode " + sslMode);
}
if (sslMode.verifyPeerName()) {
Assert.requireNonNull(hostnameVerifier, "Hostname verifier is required for ssl mode verify-full");
}
this.sslMode = sslMode;
this.sslProvider = sslProvider;
this.sslEngineCustomizer = sslEngineCustomizer;
this.sslParametersFactory = sslParametersFactory;
this.hostnameVerifier = hostnameVerifier;
}
public static SSLConfig disabled() {
return new SSLConfig(SSLMode.DISABLE, null, (hostname, session) -> true);
}
HostnameVerifier getHostnameVerifier() {
return this.hostnameVerifier;
}
public SSLMode getSslMode() {
return this.sslMode;
}
public Supplier<SslContext> getSslProvider() {
if (this.sslProvider == null) {
throw new IllegalStateException("SSL Mode disabled. SslContext provider not available");
}
return this.sslProvider;
}
public Function<SSLEngine, SSLEngine> getSslEngineCustomizer() {
return this.sslEngineCustomizer;
}
public Function<SocketAddress, SSLParameters> getSslParametersFactory() {
return this.sslParametersFactory;
}
public SSLConfig mutateMode(SSLMode newMode) {
return new SSLConfig(
newMode,
this.sslProvider,
this.sslEngineCustomizer,
this.sslParametersFactory,
this.hostnameVerifier
);
}
public static boolean isValidSniHostname(String input) {
for (int i = 0; i < input.length(); i++) {
char c = input.charAt(i);
if (isLabelSeparator(c)) {
continue;
}
if (isNonLDHAsciiCodePoint(c)) {
return false;
}
}
return true;
}
//
// LDH stands for "letter/digit/hyphen", with characters restricted to the
// 26-letter Latin alphabet <A-Z a-z>, the digits <0-9>, and the hyphen
// <->.
// Non LDH refers to characters in the ASCII range, but which are not
// letters, digits or the hypen.
//
// non-LDH = 0..0x2C, 0x2E..0x2F, 0x3A..0x40, 0x5B..0x60, 0x7B..0x7F
//
private static boolean isNonLDHAsciiCodePoint(char ch) {
return (0x0000 <= ch && ch <= 0x002C) ||
(0x002E <= ch && ch <= 0x002F) ||
(0x003A <= ch && ch <= 0x0040) ||
(0x005B <= ch && ch <= 0x0060) ||
(0x007B <= ch && ch <= 0x007F);
}
//
// to check if a character is a label separator, i.e. a dot character.
//
private static boolean isLabelSeparator(char c) {
return (c == '.' || c == '\u3002' || c == '\uFF0E' || c == '\uFF61');
}
}