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@galan
Last active September 6, 2022 09:58
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Imports the letsencrypt certificates into the java keystore
#!/bin/bash -e
# JAVA_HOME can be passed as argument if not set
if [ ! -d $JAVA_HOME ]; then
JAVA_HOME=${1}
fi
KEYSTORE=$JAVA_HOME/jre/lib/security/cacerts
if [ ! -f "$KEYSTORE" ]; then
echo "Keystore not found in '$KEYSTORE'"
exit 1
fi
cp $KEYSTORE $KEYSTORE.`date +"%Y%m%d%H%m%S"`
wget https://letsencrypt.org/certs/letsencryptauthorityx1.der
wget https://letsencrypt.org/certs/letsencryptauthorityx2.der
wget https://letsencrypt.org/certs/lets-encrypt-x1-cross-signed.der
wget https://letsencrypt.org/certs/lets-encrypt-x2-cross-signed.der
wget https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.der
wget https://letsencrypt.org/certs/lets-encrypt-x4-cross-signed.der
# to be idempotent
keytool -delete -alias isrgrootx1 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias isrgrootx2 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx1 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx2 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx3 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx4 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias isrgrootx1 -file letsencryptauthorityx1.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias isrgrootx2 -file letsencryptauthorityx2.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx1 -file lets-encrypt-x1-cross-signed.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx2 -file lets-encrypt-x2-cross-signed.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx3 -file lets-encrypt-x3-cross-signed.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx4 -file lets-encrypt-x4-cross-signed.der
rm -f letsencryptauthorityx1.der letsencryptauthorityx2.der lets-encrypt-x1-cross-signed.der lets-encrypt-x2-cross-signed.der lets-encrypt-x3-cross-signed.der lets-encrypt-x4-cross-signed.der
@galan
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galan commented May 3, 2016

Aufruf: sudo ./import-letsencrypt-java.sh $JAVA_HOME
Alternativ (auf Mac): sudo JAVA_HOME=$JAVA_HOME ./import-letsencrypt-java.sh

@leganz
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leganz commented Sep 11, 2019

You saved my day! Thx for sharing!

@amcsSH
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amcsSH commented Oct 29, 2019

Hi, thanks for your script. I would suggest, that the test if JAVA_HOME is set or empty should be enhanced your script:

   if [ "x$JAVA_HOME" == "x"  ]; then
        JAVA_HOME=${1}
        echo "Set JAVA_HOME env. variable"
   fi
   if [ ! -d $JAVA_HOME ]; then ...

because JAVA_HOME is set but empty.

@richmilne
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Thanks for doing the initial work in this @galan.

I've forked your version to update it with information on the current set (as of 2020-02-07) of Let's Encrypt's intermediate certs. At the same time I've incorporated @amcsSH's suggestion above, and used the Bash 4 dictionary feature to remove the redundant duplication of certificate names and files.

@Kendak
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Kendak commented Jun 19, 2020

If you don't have set PATH to $JAVA_HOME/jre/bin/ then keytool won't work.
Here a simple fix:
change all commands "keytool" with this:

$JAVA_HOME/jre/bin/keytool

@danielsz
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danielsz commented Dec 15, 2021

Please refer to LetsEncrypt's Chain of Trust document for up-to-date references.
Hint: I needed to adapt the script to download and install https://letsencrypt.org/certs/lets-encrypt-r3.der

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