449befa003
Motivation: IBM's J9 JVM utilizes a custom cipher naming scheme with SSL_ prefix [1] instead of the TLS_ prefix defined by TLS RFCs and the JSSE cihper suite names [2]. IBM's documentation says that the SSL_ prefix are "interchangeable" with cipher names with the TLS_ prefix [1]. To work around this issue we parse the supported cipher list and see an SSL_ prefix we can also add the same cipher with the TLS_ prefix. For more details see a discussion on IBM's forums [3] and IBM's issue tracker [4]. [1] https://www.ibm.com/support/knowledgecenter/en/SSYKE2_8.0.0/com.ibm.java.security.component.80.doc/security-component/jsse2Docs/ciphersuites.html [2] http://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#ciphersuites [3] https://www.ibm.com/developerworks/community/forums/html/topic?id=9b5a56a9-fa46-4031-b33b-df91e28d77c2 [4] https://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=71770 Modifications: - When parsing the supported cipher list to get the supported ciphers and we encounter a SSL_ prefix we should also add a TLS_ prefix cipher. - Remove SSL_ prefix ciphers from Http2SecurityUtil. Result: Work around for IBM JVM's custom naming scheme covers more cases for supported cipher suites.
75 lines
3.1 KiB
Java
75 lines
3.1 KiB
Java
/*
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* Copyright 2014 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.http2;
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import io.netty.util.internal.UnstableApi;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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/**
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* Provides utilities related to security requirements specific to HTTP/2.
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*/
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@UnstableApi
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public final class Http2SecurityUtil {
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/**
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* The following list is derived from <a
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* href="http://docs.oracle.com/javase/8/docs/technotes/guides/security/SunProviders.html">SunJSSE Supported
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* Ciphers</a> and <a
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* href="https://wiki.mozilla.org/Security/Server_Side_TLS#Modern_compatibility">Mozilla Modern Cipher
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* Suites</a> in accordance with the <a
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* href="https://tools.ietf.org/html/draft-ietf-httpbis-http2-16#section-9.2.2">HTTP/2 Specification</a>.
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*
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* According to the <a href="http://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html">
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* JSSE documentation</a> "the names mentioned in the TLS RFCs prefixed with TLS_ are functionally equivalent
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* to the JSSE cipher suites prefixed with SSL_".
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* Both variants are used to support JVMs supporting the one or the other.
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*/
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public static final List<String> CIPHERS;
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/**
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* <a href="https://wiki.mozilla.org/Security/Server_Side_TLS#Modern_compatibility">Mozilla Modern Cipher
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* Suites</a> minus the following cipher suites that are black listed by the
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* <a href="https://tools.ietf.org/html/rfc7540#appendix-A">HTTP/2 RFC</a>.
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*/
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private static final List<String> CIPHERS_JAVA_MOZILLA_MODERN_SECURITY = Collections.unmodifiableList(Arrays
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.asList(
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/* openssl = ECDHE-ECDSA-AES256-GCM-SHA384 */
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"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
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/* openssl = ECDHE-RSA-AES256-GCM-SHA384 */
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"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
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/* openssl = ECDHE-ECDSA-CHACHA20-POLY1305 */
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"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
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/* openssl = ECDHE-RSA-CHACHA20-POLY1305 */
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"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256",
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/* openssl = ECDHE-ECDSA-AES128-GCM-SHA256 */
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"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
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/* REQUIRED BY HTTP/2 SPEC */
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/* openssl = ECDHE-RSA-AES128-GCM-SHA256 */
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"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256"
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/* REQUIRED BY HTTP/2 SPEC */
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));
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static {
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CIPHERS = Collections.unmodifiableList(new ArrayList<String>(CIPHERS_JAVA_MOZILLA_MODERN_SECURITY));
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}
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private Http2SecurityUtil() { }
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}
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