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Keycloak BCrypt

Add a password hash provider to handle BCrypt passwords inside Keycloak.

Build JAR

./gradlew assemble -Pdependency.keycloak.version=${KEYCLOAK_VERSION}

Build Docker image

docker build \
    --build-arg keycloak_version=${KEYCLOAK_VERSION} \
    -t gleroy/keycloak-bcrypt \
    .

Test with docker-compose

docker-compose up -d

Install

>= 17.0.0

curl -L https://github.com/leroyguillaume/keycloak-bcrypt/releases/download/${KEYCLOAK_BCRYPT_VERSION}/keycloak-bcrypt-${KEYCLOAK_BCRYPT_VERSION}.jar > ${KEYCLOAK_HOME}/providers/keycloak-bcrypt-${KEYCLOAK_BCRYPT_VERSION}.jar

You need to restart Keycloak.

< 17.0.0

curl -L https://github.com/leroyguillaume/keycloak-bcrypt/releases/download/${KEYCLOAK_BCRYPT_VERSION}/keycloak-bcrypt-${KEYCLOAK_BCRYPT_VERSION}.jar > ${KEYCLOAK_HOME}/standalone/deployments/keycloak-bcrypt-${KEYCLOAK_BCRYPT_VERSION}.jar

You need to restart Keycloak.

Run with Docker

docker run \
    -e KEYCLOAK_ADMIN=${KEYCLOAK_ADMIN} \
    -e KEYCLOAK_ADMIN_PASSWORD=${KEYCLOAK_ADMIN_PASSWORD} \
    -e KC_HOSTNAME=${KC_HOSTNAME} \
    gleroy/keycloak-bcrypt \
    start

The image is based on Keycloak official one.

How to use

Go to Authentication / Policies / Password policy and add hashing algorithm policy with value bcrypt.

To test if installation works, create new user and set its credentials.