톰캣 JDK 1.7로 구동되는 환경에서 TLS1.2 통신되게 설정하기

이전에 작성한 글에 이어서 2탄입니다.

이전에 작성한 글에서 JDK 1.7은 TLS1.0이 기본값이고 이로인해 Spring 프레임워크 사이트와 통신이 안 되어 xsd 파일을 못 불러오는 문제가 있었죠.

그 당시에는 xml 파일에서 https를 http로 변경하여 사용하는 방법을 이용하였는데

파일 수정 없이 톰캣 실행 환경을 수정하여 해당 톰캣이 HTTPS 통신할 때 TLS 1.0 통신이 아닌 TLS 1.2 통신으로만 하도록 설정할 수 있는 값을 찾았습니다.

  JDK 1.7로 구동되는 톰캣에서 HTTPS 통신 시 TLS 1.0이 아닌 TLS 1.2으로 통신하도록 설정하기

톰캣이 설치되어있는 폴더를 들어가줍니다.

해당 폴더에서 bin 폴더로 들어가시면

catalina.sh 라는 파일이 있습니다.

setenv.sh 파일 사용하시면 거기다 설정하셔도 됩니다만

보편적으로 안 쓰시는 경우가 많더라고요.

catalin.sh 파일을 열어줍니다.

#!/bin/sh

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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
#
#     http://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.

# -----------------------------------------------------------------------------
# Control Script for the CATALINA Server
#
# For supported commands call "catalina.sh help" or see the usage section at
# the end of this file.
#
# Environment Variable Prerequisites
#
#   Do not set the variables in this script. Instead put them into a script
#   setenv.sh in CATALINA_BASE/bin to keep your customizations separate.
#
#   CATALINA_HOME   May point at your Catalina "build" directory.
#
#   CATALINA_BASE   (Optional) Base directory for resolving dynamic portions
#                   of a Catalina installation.  If not present, resolves to
#                   the same directory that CATALINA_HOME points to.
#
#   CATALINA_OUT    (Optional) Full path to a file where stdout and stderr
#                   will be redirected.
#                   Default is $CATALINA_BASE/logs/catalina.out
#
#   CATALINA_OUT_CMD (Optional) Command which will be executed and receive
#                   as its stdin the stdout and stderr from the Tomcat java
#                   process. If CATALINA_OUT_CMD is set, the value of
#                   CATALINA_OUT will be used as a named pipe.
#                   No default.
#                   Example (all one line)
#                   CATALINA_OUT_CMD="/usr/bin/rotatelogs -f $CATALINA_BASE/logs/catalina.out.%Y-%m-%d.log 86400"
#
#   CATALINA_OPTS   (Optional) Java runtime options used when the "start",
#                   "run" or "debug" command is executed.
#                   Include here and not in JAVA_OPTS all options, that should
#                   only be used by Tomcat itself, not by the stop process,
#                   the version command etc.
#                   Examples are heap size, GC logging, JMX ports etc.
#
#   CATALINA_TMPDIR (Optional) Directory path location of temporary directory
#                   the JVM should use (java.io.tmpdir).  Defaults to
#                   $CATALINA_BASE/temp.
#
#   JAVA_HOME       Must point at your Java Development Kit installation.
#                   Required to run the with the "debug" argument.
#
#   JRE_HOME        Must point at your Java Runtime installation.
#                   Defaults to JAVA_HOME if empty. If JRE_HOME and JAVA_HOME
#                   are both set, JRE_HOME is used.
#
#   JAVA_OPTS       (Optional) Java runtime options used when any command
#                   is executed.
#                   Include here and not in CATALINA_OPTS all options, that
#                   should be used by Tomcat and also by the stop process,
#                   the version command etc.
#                   Most options should go into CATALINA_OPTS.
#
#   JAVA_ENDORSED_DIRS (Optional) Lists of of colon separated directories
#                   containing some jars in order to allow replacement of APIs
#                   created outside of the JCP (i.e. DOM and SAX from W3C).
#                   It can also be used to update the XML parser implementation.
#                   This is only supported for Java <= 8.
#                   Defaults to $CATALINA_HOME/endorsed.
#
#   JPDA_TRANSPORT  (Optional) JPDA transport used when the "jpda start"
#                   command is executed. The default is "dt_socket".
#
#   JPDA_ADDRESS    (Optional) Java runtime options used when the "jpda start"
#                   command is executed. The default is localhost:8000.
#
#   JPDA_SUSPEND    (Optional) Java runtime options used when the "jpda start"
#                   command is executed. Specifies whether JVM should suspend
#                   execution immediately after startup. Default is "n".
#
#   JPDA_OPTS       (Optional) Java runtime options used when the "jpda start"
#                   command is executed. If used, JPDA_TRANSPORT, JPDA_ADDRESS,
#                   and JPDA_SUSPEND are ignored. Thus, all required jpda
#                   options MUST be specified. The default is:
#
#                   -agentlib:jdwp=transport=$JPDA_TRANSPORT,
#                       address=$JPDA_ADDRESS,server=y,suspend=$JPDA_SUSPEND
#
#   JSSE_OPTS       (Optional) Java runtime options used to control the TLS
#                   implementation when JSSE is used. Default is:
#                   "-Djdk.tls.ephemeralDHKeySize=2048"
#
#   CATALINA_PID    (Optional) Path of the file which should contains the pid
#                   of the catalina startup java process, when start (fork) is
#                   used
#
#   CATALINA_LOGGING_CONFIG (Optional) Override Tomcat's logging config file
#                   Example (all one line)
#                   CATALINA_LOGGING_CONFIG="-Djava.util.logging.config.file=$CATALINA_BASE/conf/logging.properties"
#
#   LOGGING_CONFIG  Deprecated
#                   Use CATALINA_LOGGING_CONFIG
#                   This is only used if CATALINA_LOGGING_CONFIG is not set
#                   and LOGGING_CONFIG starts with "-D..."
#
#   LOGGING_MANAGER (Optional) Override Tomcat's logging manager
#                   Example (all one line)
#                   LOGGING_MANAGER="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
#
#   UMASK           (Optional) Override Tomcat's default UMASK of 0027
#
#   USE_NOHUP       (Optional) If set to the string true the start command will
#                   use nohup so that the Tomcat process will ignore any hangup
#                   signals. Default is "false" unless running on HP-UX in which
#                   case the default is "true"
# -----------------------------------------------------------------------------

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false
darwin=false
os400=false
hpux=false
case "`uname`" in
CYGWIN*) cygwin=true;;
Darwin*) darwin=true;;
OS400*) os400=true;;
HP-UX*) hpux=true;;
esac

# resolve links - $0 may be a softlink
PRG="$0"

while [ -h "$PRG" ]; do
  ls=`ls -ld "$PRG"`
  link=`expr "$ls" : '.*-> \(.*\)$'`
  if expr "$link" : '/.*' > /dev/null; then
    PRG="$link"
  else
    PRG=`dirname "$PRG"`/"$link"
  fi
done

# Get standard environment variables
PRGDIR=`dirname "$PRG"`

# Only set CATALINA_HOME if not already set
[ -z "$CATALINA_HOME" ] && CATALINA_HOME=`cd "$PRGDIR/.." >/dev/null; pwd`

# Copy CATALINA_BASE from CATALINA_HOME if not already set
[ -z "$CATALINA_BASE" ] && CATALINA_BASE="$CATALINA_HOME"

# Ensure that any user defined CLASSPATH variables are not used on startup,
# but allow them to be specified in setenv.sh, in rare case when it is needed.
CLASSPATH=

if [ -r "$CATALINA_BASE/bin/setenv.sh" ]; then
  . "$CATALINA_BASE/bin/setenv.sh"
elif [ -r "$CATALINA_HOME/bin/setenv.sh" ]; then
  . "$CATALINA_HOME/bin/setenv.sh"
fi

위와 같은 코드 형태가 나오실텐데요.

#   USE_NOHUP       (Optional) If set to the string true the start command will
#                   use nohup so that the Tomcat process will ignore any hangup
#                   signals. Default is "false" unless running on HP-UX in which
#                   case the default is "true"
# -----------------------------------------------------------------------------

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false
darwin=false
os400=false
hpux=false
case "`uname`" in

대략적으로 위 코드가 적혀있는 부분을 찾아줍시다.

찾으셨다면

# ------와

# OS specific

사이에 빈공간이 있는데요

해당 위치에 JAVA 옵션값을 넣어줍시다.

JAVA_OPTS="$JAVA_OPTS -Dhttps.protocols=TLSv1.2 -Djdk.tls.client.protocols=TLSv1.2"

사실 저희가 필요한 코드는 -Dhttps.protocols=TLSv1.2 -Djdk.tls.client.protocols=TLSv1.2 이 부분이지만

혹시나 setenv.sh나 startup.sh, setclasspath.sh 같은 파일에서 JAVA_OPTS를 설정하는 경우가 있기 때문에

위와 같은 코드형태로 입력해주는 겁니다.

코드를 제대로 넣으셨다면 아래와 같은 코드 형태가 되어야합니다.

#
#   LOGGING_MANAGER (Optional) Override Tomcat's logging manager
#                   Example (all one line)
#                   LOGGING_MANAGER="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"
#
#   UMASK           (Optional) Override Tomcat's default UMASK of 0027
#
#   USE_NOHUP       (Optional) If set to the string true the start command will
#                   use nohup so that the Tomcat process will ignore any hangup
#                   signals. Default is "false" unless running on HP-UX in which
#                   case the default is "true"
# -----------------------------------------------------------------------------

JAVA_OPTS="$JAVA_OPTS -Dhttps.protocols=TLSv1.2 -Djdk.tls.client.protocols=TLSv1.2"

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false
darwin=false
os400=false
hpux=false
case "`uname`" in
CYGWIN*) cygwin=true;;
Darwin*) darwin=true;;
OS400*) os400=true;;
HP-UX*) hpux=true;;
esac

이제 톰캣을 재기동해주시면 됩니다.

환경이 달라 제대로 동작하지 않을 수 있으니 안되시면 https를 http로 변경하시는 방법을 쓰시길 추천드립니다 ㅠㅠ

제가 자바 개발자가 아니라서 정확한 답변을 드리기가 어려울 수 있습니다.