grails.plugin.springsecurity.rest.token.generation.jwt.FileRSAKeyProvider.groovy Maven / Gradle / Ivy

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Grails plugin to implement token-based, RESTful authentication using Spring Security

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/* Copyright 2024 the original author or authors.
 *
 * Licensed 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.
 */
package grails.plugin.springsecurity.rest.token.generation.jwt

import groovy.transform.CompileStatic
import groovy.util.logging.Slf4j
import org.springframework.beans.factory.InitializingBean

import java.security.KeyFactory
import java.security.interfaces.RSAPrivateKey
import java.security.interfaces.RSAPublicKey
import java.security.spec.PKCS8EncodedKeySpec
import java.security.spec.X509EncodedKeySpec

/**
 * Loads RSA public/private key's from files
 */
@Slf4j
@CompileStatic
class FileRSAKeyProvider implements RSAKeyProvider, InitializingBean {

    /** Full path to the public key so that {@code new File(publicKeyPath).exists() == true} */
    String publicKeyPath

    /** Full path to the private key so that {@code new File(publicKeyPath).exists() == true} */
    String privateKeyPath

    RSAPublicKey publicKey
    RSAPrivateKey privateKey

    @Override
    void afterPropertiesSet() throws Exception {
        log.debug "Loading public/private key from DER files"
        KeyFactory kf = KeyFactory.getInstance("RSA")

        def key = new File(publicKeyPath)
        log.debug "Public key path: ${key.absolutePath}"
        def keyBytes = key.bytes
        def spec = new X509EncodedKeySpec(keyBytes)
        publicKey = kf.generatePublic(spec) as RSAPublicKey

        key = new File(privateKeyPath)
        log.debug "Private key path: ${key.absolutePath}"
        keyBytes = key.bytes
        spec = new PKCS8EncodedKeySpec(keyBytes)
        privateKey = kf.generatePrivate(spec) as RSAPrivateKey
    }
}