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Merge pull request #121778 from talyz/keycloak-security

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nixos/keycloak: Security fixes + misc
This commit is contained in:
Elis Hirwing 2021-05-21 16:55:26 +02:00 committed by GitHub
commit e9cca93bf9
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3 changed files with 205 additions and 152 deletions
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296
nixos/modules/services/web-apps/keycloak.nix
View file

@ -54,6 +54,7 @@ in
frontendUrl = lib.mkOption {
type = lib.types.str;
apply = x: if lib.hasSuffix "/" x then x else x + "/";
example = "keycloak.example.com/auth";
description = ''
The public URL used as base for all frontend requests. Should
@ -84,113 +85,128 @@ in
'';
};
certificatePrivateKeyBundle = lib.mkOption {
sslCertificate = lib.mkOption {
type = lib.types.nullOr lib.types.path;
default = null;
example = "/run/keys/ssl_cert";
description = ''
The path to a PEM formatted bundle of the private key and
certificate to use for TLS connections.
The path to a PEM formatted certificate to use for TLS/SSL
connections.
This should be a string, not a Nix path, since Nix paths are
copied into the world-readable Nix store.
'';
};
databaseType = lib.mkOption {
type = lib.types.enum [ "mysql" "postgresql" ];
default = "postgresql";
example = "mysql";
description = ''
The type of database Keycloak should connect to.
'';
};
databaseHost = lib.mkOption {
type = lib.types.str;
default = "localhost";
description = ''
Hostname of the database to connect to.
'';
};
databasePort =
let
dbPorts = {
postgresql = 5432;
mysql = 3306;
};
in
lib.mkOption {
type = lib.types.port;
default = dbPorts.${cfg.databaseType};
description = ''
Port of the database to connect to.
'';
};
databaseUseSSL = lib.mkOption {
type = lib.types.bool;
default = cfg.databaseHost != "localhost";
description = ''
Whether the database connection should be secured by SSL /
TLS.
'';
};
databaseCaCert = lib.mkOption {
sslCertificateKey = lib.mkOption {
type = lib.types.nullOr lib.types.path;
default = null;
example = "/run/keys/ssl_key";
description = ''
The SSL / TLS CA certificate that verifies the identity of the
database server.
Required when PostgreSQL is used and SSL is turned on.
For MySQL, if left at <literal>null</literal>, the default
Java keystore is used, which should suffice if the server
certificate is issued by an official CA.
'';
};
databaseCreateLocally = lib.mkOption {
type = lib.types.bool;
default = true;
description = ''
Whether a database should be automatically created on the
local host. Set this to false if you plan on provisioning a
local database yourself. This has no effect if
services.keycloak.databaseHost is customized.
'';
};
databaseUsername = lib.mkOption {
type = lib.types.str;
default = "keycloak";
description = ''
Username to use when connecting to an external or manually
provisioned database; has no effect when a local database is
automatically provisioned.
To use this with a local database, set <xref
linkend="opt-services.keycloak.databaseCreateLocally" /> to
<literal>false</literal> and create the database and user
manually. The database should be called
<literal>keycloak</literal>.
'';
};
databasePasswordFile = lib.mkOption {
type = lib.types.path;
example = "/run/keys/db_password";
description = ''
File containing the database password.
The path to a PEM formatted private key to use for TLS/SSL
connections.
This should be a string, not a Nix path, since Nix paths are
copied into the world-readable Nix store.
'';
};
database = {
type = lib.mkOption {
type = lib.types.enum [ "mysql" "postgresql" ];
default = "postgresql";
example = "mysql";
description = ''
The type of database Keycloak should connect to.
'';
};
host = lib.mkOption {
type = lib.types.str;
default = "localhost";
description = ''
Hostname of the database to connect to.
'';
};
port =
let
dbPorts = {
postgresql = 5432;
mysql = 3306;
};
in
lib.mkOption {
type = lib.types.port;
default = dbPorts.${cfg.database.type};
description = ''
Port of the database to connect to.
'';
};
useSSL = lib.mkOption {
type = lib.types.bool;
default = cfg.database.host != "localhost";
description = ''
Whether the database connection should be secured by SSL /
TLS.
'';
};
caCert = lib.mkOption {
type = lib.types.nullOr lib.types.path;
default = null;
description = ''
The SSL / TLS CA certificate that verifies the identity of the
database server.
Required when PostgreSQL is used and SSL is turned on.
For MySQL, if left at <literal>null</literal>, the default
Java keystore is used, which should suffice if the server
certificate is issued by an official CA.
'';
};
createLocally = lib.mkOption {
type = lib.types.bool;
default = true;
description = ''
Whether a database should be automatically created on the
local host. Set this to false if you plan on provisioning a
local database yourself. This has no effect if
services.keycloak.database.host is customized.
'';
};
username = lib.mkOption {
type = lib.types.str;
default = "keycloak";
description = ''
Username to use when connecting to an external or manually
provisioned database; has no effect when a local database is
automatically provisioned.
To use this with a local database, set <xref
linkend="opt-services.keycloak.database.createLocally" /> to
<literal>false</literal> and create the database and user
manually. The database should be called
<literal>keycloak</literal>.
'';
};
passwordFile = lib.mkOption {
type = lib.types.path;
example = "/run/keys/db_password";
description = ''
File containing the database password.
This should be a string, not a Nix path, since Nix paths are
copied into the world-readable Nix store.
'';
};
};
package = lib.mkOption {
type = lib.types.package;
default = pkgs.keycloak;
@ -261,12 +277,12 @@ in
config =
let
# We only want to create a database if we're actually going to connect to it.
databaseActuallyCreateLocally = cfg.databaseCreateLocally && cfg.databaseHost == "localhost";
createLocalPostgreSQL = databaseActuallyCreateLocally && cfg.databaseType == "postgresql";
createLocalMySQL = databaseActuallyCreateLocally && cfg.databaseType == "mysql";
databaseActuallyCreateLocally = cfg.database.createLocally && cfg.database.host == "localhost";
createLocalPostgreSQL = databaseActuallyCreateLocally && cfg.database.type == "postgresql";
createLocalMySQL = databaseActuallyCreateLocally && cfg.database.type == "mysql";
mySqlCaKeystore = pkgs.runCommandNoCC "mysql-ca-keystore" {} ''
${pkgs.jre}/bin/keytool -importcert -trustcacerts -alias MySQLCACert -file ${cfg.databaseCaCert} -keystore $out -storepass notsosecretpassword -noprompt
${pkgs.jre}/bin/keytool -importcert -trustcacerts -alias MySQLCACert -file ${cfg.database.caCert} -keystore $out -storepass notsosecretpassword -noprompt
'';
keycloakConfig' = builtins.foldl' lib.recursiveUpdate {
@ -282,11 +298,11 @@ in
};
"subsystem=datasources"."data-source=KeycloakDS" = {
max-pool-size = "20";
user-name = if databaseActuallyCreateLocally then "keycloak" else cfg.databaseUsername;
user-name = if databaseActuallyCreateLocally then "keycloak" else cfg.database.username;
password = "@db-password@";
};
} [
(lib.optionalAttrs (cfg.databaseType == "postgresql") {
(lib.optionalAttrs (cfg.database.type == "postgresql") {
"subsystem=datasources" = {
"jdbc-driver=postgresql" = {
driver-module-name = "org.postgresql";
@ -294,16 +310,16 @@ in
driver-xa-datasource-class-name = "org.postgresql.xa.PGXADataSource";
};
"data-source=KeycloakDS" = {
connection-url = "jdbc:postgresql://${cfg.databaseHost}:${builtins.toString cfg.databasePort}/keycloak";
connection-url = "jdbc:postgresql://${cfg.database.host}:${builtins.toString cfg.database.port}/keycloak";
driver-name = "postgresql";
"connection-properties=ssl".value = lib.boolToString cfg.databaseUseSSL;
} // (lib.optionalAttrs (cfg.databaseCaCert != null) {
"connection-properties=sslrootcert".value = cfg.databaseCaCert;
"connection-properties=ssl".value = lib.boolToString cfg.database.useSSL;
} // (lib.optionalAttrs (cfg.database.caCert != null) {
"connection-properties=sslrootcert".value = cfg.database.caCert;
"connection-properties=sslmode".value = "verify-ca";
});
};
})
(lib.optionalAttrs (cfg.databaseType == "mysql") {
(lib.optionalAttrs (cfg.database.type == "mysql") {
"subsystem=datasources" = {
"jdbc-driver=mysql" = {
driver-module-name = "com.mysql";
@ -311,22 +327,22 @@ in
driver-class-name = "com.mysql.jdbc.Driver";
};
"data-source=KeycloakDS" = {
connection-url = "jdbc:mysql://${cfg.databaseHost}:${builtins.toString cfg.databasePort}/keycloak";
connection-url = "jdbc:mysql://${cfg.database.host}:${builtins.toString cfg.database.port}/keycloak";
driver-name = "mysql";
"connection-properties=useSSL".value = lib.boolToString cfg.databaseUseSSL;
"connection-properties=requireSSL".value = lib.boolToString cfg.databaseUseSSL;
"connection-properties=verifyServerCertificate".value = lib.boolToString cfg.databaseUseSSL;
"connection-properties=useSSL".value = lib.boolToString cfg.database.useSSL;
"connection-properties=requireSSL".value = lib.boolToString cfg.database.useSSL;
"connection-properties=verifyServerCertificate".value = lib.boolToString cfg.database.useSSL;
"connection-properties=characterEncoding".value = "UTF-8";
valid-connection-checker-class-name = "org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker";
validate-on-match = true;
exception-sorter-class-name = "org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter";
} // (lib.optionalAttrs (cfg.databaseCaCert != null) {
} // (lib.optionalAttrs (cfg.database.caCert != null) {
"connection-properties=trustCertificateKeyStoreUrl".value = "file:${mySqlCaKeystore}";
"connection-properties=trustCertificateKeyStorePassword".value = "notsosecretpassword";
});
};
})
(lib.optionalAttrs (cfg.certificatePrivateKeyBundle != null) {
(lib.optionalAttrs (cfg.sslCertificate != null && cfg.sslCertificateKey != null) {
"socket-binding-group=standard-sockets"."socket-binding=https".port = cfg.httpsPort;
"core-service=management"."security-realm=UndertowRealm"."server-identity=ssl" = {
keystore-path = "/run/keycloak/ssl/certificate_private_key_bundle.p12";
@ -537,7 +553,9 @@ in
jbossCliScript = pkgs.writeText "jboss-cli-script" (mkJbossScript keycloakConfig');
keycloakConfig = pkgs.runCommandNoCC "keycloak-config" {} ''
keycloakConfig = pkgs.runCommandNoCC "keycloak-config" {
nativeBuildInputs = [ cfg.package ];
} ''
export JBOSS_BASE_DIR="$(pwd -P)";
export JBOSS_MODULEPATH="${cfg.package}/modules";
export JBOSS_LOG_DIR="$JBOSS_BASE_DIR/log";
@ -547,11 +565,11 @@ in
mkdir -p {deployments,ssl}
"${cfg.package}/bin/standalone.sh"&
standalone.sh&
attempt=1
max_attempts=30
while ! ${cfg.package}/bin/jboss-cli.sh --connect ':read-attribute(name=server-state)'; do
while ! jboss-cli.sh --connect ':read-attribute(name=server-state)'; do
if [[ "$attempt" == "$max_attempts" ]]; then
echo "ERROR: Could not connect to Keycloak after $attempt attempts! Failing.." >&2
exit 1
@ -561,7 +579,7 @@ in
(( attempt++ ))
done
${cfg.package}/bin/jboss-cli.sh --connect --file=${jbossCliScript} --echo-command
jboss-cli.sh --connect --file=${jbossCliScript} --echo-command
cp configuration/standalone.xml $out
'';
@ -570,8 +588,8 @@ in
assertions = [
{
assertion = (cfg.databaseUseSSL && cfg.databaseType == "postgresql") -> (cfg.databaseCaCert != null);
message = "A CA certificate must be specified (in 'services.keycloak.databaseCaCert') when PostgreSQL is used with SSL";
assertion = (cfg.database.useSSL && cfg.database.type == "postgresql") -> (cfg.database.caCert != null);
message = "A CA certificate must be specified (in 'services.keycloak.database.caCert') when PostgreSQL is used with SSL";
}
];
@ -581,6 +599,7 @@ in
after = [ "postgresql.service" ];
before = [ "keycloak.service" ];
bindsTo = [ "postgresql.service" ];
path = [ config.services.postgresql.package ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
@ -588,13 +607,15 @@ in
Group = "postgres";
};
script = ''
set -eu
set -o errexit -o pipefail -o nounset -o errtrace
shopt -s inherit_errexit
PSQL=${config.services.postgresql.package}/bin/psql
create_role="$(mktemp)"
trap 'rm -f "$create_role"' ERR EXIT
db_password="$(<'${cfg.databasePasswordFile}')"
$PSQL -tAc "SELECT 1 FROM pg_roles WHERE rolname='keycloak'" | grep -q 1 || $PSQL -tAc "CREATE ROLE keycloak WITH LOGIN PASSWORD '$db_password' CREATEDB"
$PSQL -tAc "SELECT 1 FROM pg_database WHERE datname = 'keycloak'" | grep -q 1 || $PSQL -tAc 'CREATE DATABASE "keycloak" OWNER "keycloak"'
echo "CREATE ROLE keycloak WITH LOGIN PASSWORD '$(<'${cfg.database.passwordFile}')' CREATEDB" > "$create_role"
psql -tAc "SELECT 1 FROM pg_roles WHERE rolname='keycloak'" | grep -q 1 || psql -tA --file="$create_role"
psql -tAc "SELECT 1 FROM pg_database WHERE datname = 'keycloak'" | grep -q 1 || psql -tAc 'CREATE DATABASE "keycloak" OWNER "keycloak"'
'';
};
@ -602,6 +623,7 @@ in
after = [ "mysql.service" ];
before = [ "keycloak.service" ];
bindsTo = [ "mysql.service" ];
path = [ config.services.mysql.package ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
@ -609,13 +631,14 @@ in
Group = config.services.mysql.group;
};
script = ''
set -eu
set -o errexit -o pipefail -o nounset -o errtrace
shopt -s inherit_errexit
db_password="$(<'${cfg.databasePasswordFile}')"
db_password="$(<'${cfg.database.passwordFile}')"
( echo "CREATE USER IF NOT EXISTS 'keycloak'@'localhost' IDENTIFIED BY '$db_password';"
echo "CREATE DATABASE keycloak CHARACTER SET utf8 COLLATE utf8_unicode_ci;"
echo "GRANT ALL PRIVILEGES ON keycloak.* TO 'keycloak'@'localhost';"
) | ${config.services.mysql.package}/bin/mysql -N
) | mysql -N
'';
};
@ -634,6 +657,8 @@ in
bindsTo = databaseServices;
wantedBy = [ "multi-user.target" ];
path = with pkgs; [
cfg.package
openssl
replace-secret
];
environment = {
@ -644,14 +669,21 @@ in
serviceConfig = {
ExecStartPre = let
startPreFullPrivileges = ''
set -eu
set -o errexit -o pipefail -o nounset -o errtrace
shopt -s inherit_errexit
install -T -m 0400 -o keycloak -g keycloak '${cfg.databasePasswordFile}' /run/keycloak/secrets/db_password
'' + lib.optionalString (cfg.certificatePrivateKeyBundle != null) ''
install -T -m 0400 -o keycloak -g keycloak '${cfg.certificatePrivateKeyBundle}' /run/keycloak/secrets/ssl_cert_pk_bundle
umask u=rwx,g=,o=
install -T -m 0400 -o keycloak -g keycloak '${cfg.database.passwordFile}' /run/keycloak/secrets/db_password
'' + lib.optionalString (cfg.sslCertificate != null && cfg.sslCertificateKey != null) ''
install -T -m 0400 -o keycloak -g keycloak '${cfg.sslCertificate}' /run/keycloak/secrets/ssl_cert
install -T -m 0400 -o keycloak -g keycloak '${cfg.sslCertificateKey}' /run/keycloak/secrets/ssl_key
'';
startPre = ''
set -eu
set -o errexit -o pipefail -o nounset -o errtrace
shopt -s inherit_errexit
umask u=rwx,g=,o=
install -m 0600 ${cfg.package}/standalone/configuration/*.properties /run/keycloak/configuration
install -T -m 0600 ${keycloakConfig} /run/keycloak/configuration/standalone.xml
@ -659,13 +691,16 @@ in
replace-secret '@db-password@' '/run/keycloak/secrets/db_password' /run/keycloak/configuration/standalone.xml
export JAVA_OPTS=-Djboss.server.config.user.dir=/run/keycloak/configuration
${cfg.package}/bin/add-user-keycloak.sh -u admin -p '${cfg.initialAdminPassword}'
'' + lib.optionalString (cfg.certificatePrivateKeyBundle != null) ''
add-user-keycloak.sh -u admin -p '${cfg.initialAdminPassword}'
'' + lib.optionalString (cfg.sslCertificate != null && cfg.sslCertificateKey != null) ''
pushd /run/keycloak/ssl/
cat /run/keycloak/secrets/ssl_cert_pk_bundle <(echo) /etc/ssl/certs/ca-certificates.crt > allcerts.pem
${pkgs.openssl}/bin/openssl pkcs12 -export -in /run/keycloak/secrets/ssl_cert_pk_bundle -chain \
-name "${cfg.frontendUrl}" -out certificate_private_key_bundle.p12 \
-CAfile allcerts.pem -passout pass:notsosecretpassword
cat /run/keycloak/secrets/ssl_cert <(echo) \
/run/keycloak/secrets/ssl_key <(echo) \
/etc/ssl/certs/ca-certificates.crt \
> allcerts.pem
openssl pkcs12 -export -in /run/keycloak/secrets/ssl_cert -inkey /run/keycloak/secrets/ssl_key -chain \
-name "${cfg.frontendUrl}" -out certificate_private_key_bundle.p12 \
-CAfile allcerts.pem -passout pass:notsosecretpassword
popd
'';
in [
@ -697,4 +732,5 @@ in
};
meta.doc = ./keycloak.xml;
meta.maintainers = [ lib.maintainers.talyz ];
}

37
nixos/modules/services/web-apps/keycloak.xml
View file

@ -41,31 +41,31 @@
<productname>PostgreSQL</productname> or
<productname>MySQL</productname>. Which one is used can be
configured in <xref
linkend="opt-services.keycloak.databaseType" />. The selected
linkend="opt-services.keycloak.database.type" />. The selected
database will automatically be enabled and a database and role
created unless <xref
linkend="opt-services.keycloak.databaseHost" /> is changed from
linkend="opt-services.keycloak.database.host" /> is changed from
its default of <literal>localhost</literal> or <xref
linkend="opt-services.keycloak.databaseCreateLocally" /> is set
linkend="opt-services.keycloak.database.createLocally" /> is set
to <literal>false</literal>.
</para>
<para>
External database access can also be configured by setting
<xref linkend="opt-services.keycloak.databaseHost" />, <xref
linkend="opt-services.keycloak.databaseUsername" />, <xref
linkend="opt-services.keycloak.databaseUseSSL" /> and <xref
linkend="opt-services.keycloak.databaseCaCert" /> as
<xref linkend="opt-services.keycloak.database.host" />, <xref
linkend="opt-services.keycloak.database.username" />, <xref
linkend="opt-services.keycloak.database.useSSL" /> and <xref
linkend="opt-services.keycloak.database.caCert" /> as
appropriate. Note that you need to manually create a database
called <literal>keycloak</literal> and allow the configured
database user full access to it.
</para>
<para>
<xref linkend="opt-services.keycloak.databasePasswordFile" />
<xref linkend="opt-services.keycloak.database.passwordFile" />
must be set to the path to a file containing the password used
to log in to the database. If <xref linkend="opt-services.keycloak.databaseHost" />
and <xref linkend="opt-services.keycloak.databaseCreateLocally" />
to log in to the database. If <xref linkend="opt-services.keycloak.database.host" />
and <xref linkend="opt-services.keycloak.database.createLocally" />
are kept at their defaults, the database role
<literal>keycloak</literal> with that password is provisioned
on the local database instance.
@ -115,17 +115,17 @@
</para>
<para>
For HTTPS support, a TLS certificate and private key is
required. They should be <link
HTTPS support requires a TLS/SSL certificate and a private key,
both <link
xlink:href="https://en.wikipedia.org/wiki/Privacy-Enhanced_Mail">PEM
formatted</link> and concatenated into a single file. The path
to this file should be configured in
<xref linkend="opt-services.keycloak.certificatePrivateKeyBundle" />.
formatted</link>. Their paths should be set through <xref
linkend="opt-services.keycloak.sslCertificate" /> and <xref
linkend="opt-services.keycloak.sslCertificateKey" />.
</para>
<warning>
<para>
The path should be provided as a string, not a Nix path,
The paths should be provided as a strings, not a Nix paths,
since Nix paths are copied into the world readable Nix store.
</para>
</warning>
@ -195,8 +195,9 @@ services.keycloak = {
<link linkend="opt-services.keycloak.initialAdminPassword">initialAdminPassword</link> = "e6Wcm0RrtegMEHl"; # change on first login
<link linkend="opt-services.keycloak.frontendUrl">frontendUrl</link> = "https://keycloak.example.com/auth";
<link linkend="opt-services.keycloak.forceBackendUrlToFrontendUrl">forceBackendUrlToFrontendUrl</link> = true;
<link linkend="opt-services.keycloak.certificatePrivateKeyBundle">certificatePrivateKeyBundle</link> = "/run/keys/ssl_cert";
<link linkend="opt-services.keycloak.databasePasswordFile">databasePasswordFile</link> = "/run/keys/db_password";
<link linkend="opt-services.keycloak.sslCertificate">sslCertificate</link> = "/run/keys/ssl_cert";
<link linkend="opt-services.keycloak.sslCertificateKey">sslCertificateKey</link> = "/run/keys/ssl_key";
<link linkend="opt-services.keycloak.database.passwordFile">database.passwordFile</link> = "/run/keys/db_password";
};
</programlisting>
</para>

24
nixos/tests/keycloak.nix
View file

@ -3,7 +3,8 @@
# client using their Keycloak login.
let
frontendUrl = "http://keycloak/auth";
certs = import ./common/acme/server/snakeoil-certs.nix;
frontendUrl = "https://${certs.domain}/auth";
initialAdminPassword = "h4IhoJFnt2iQIR9";
keycloakTest = import ./make-test-python.nix (
@ -17,12 +18,27 @@ let
nodes = {
keycloak = { ... }: {
virtualisation.memorySize = 1024;
security.pki.certificateFiles = [
certs.ca.cert
];
networking.extraHosts = ''
127.0.0.1 ${certs.domain}
'';
services.keycloak = {
enable = true;
inherit frontendUrl databaseType initialAdminPassword;
databaseUsername = "bogus";
databasePasswordFile = pkgs.writeText "dbPassword" "wzf6vOCbPp6cqTH";
inherit frontendUrl initialAdminPassword;
sslCertificate = certs.${certs.domain}.cert;
sslCertificateKey = certs.${certs.domain}.key;
database = {
type = databaseType;
username = "bogus";
passwordFile = pkgs.writeText "dbPassword" "wzf6vOCbPp6cqTH";
};
};
environment.systemPackages = with pkgs; [
xmlstarlet
libtidy