org.springframework.security.crypto.keys.KeyGeneratorUtils Maven / Gradle / Ivy
/*
* Copyright 2020 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
*
* https://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 org.springframework.security.crypto.keys;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.spec.ECFieldFp;
import java.security.spec.ECParameterSpec;
import java.security.spec.ECPoint;
import java.security.spec.EllipticCurve;
/**
* @author Joe Grandja
* @since 0.0.1
*/
final class KeyGeneratorUtils {
static SecretKey generateSecretKey() {
SecretKey hmacKey;
try {
hmacKey = KeyGenerator.getInstance("HmacSha256").generateKey();
} catch (Exception ex) {
throw new IllegalStateException(ex);
}
return hmacKey;
}
static KeyPair generateRsaKey() {
KeyPair keyPair;
try {
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(2048);
keyPair = keyPairGenerator.generateKeyPair();
} catch (Exception ex) {
throw new IllegalStateException(ex);
}
return keyPair;
}
static KeyPair generateEcKey() {
EllipticCurve ellipticCurve = new EllipticCurve(
new ECFieldFp(
new BigInteger("115792089210356248762697446949407573530086143415290314195533631308867097853951")),
new BigInteger("115792089210356248762697446949407573530086143415290314195533631308867097853948"),
new BigInteger("41058363725152142129326129780047268409114441015993725554835256314039467401291"));
ECPoint ecPoint = new ECPoint(
new BigInteger("48439561293906451759052585252797914202762949526041747995844080717082404635286"),
new BigInteger("36134250956749795798585127919587881956611106672985015071877198253568414405109"));
ECParameterSpec ecParameterSpec = new ECParameterSpec(
ellipticCurve,
ecPoint,
new BigInteger("115792089210356248762697446949407573529996955224135760342422259061068512044369"),
1);
KeyPair keyPair;
try {
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("EC");
keyPairGenerator.initialize(ecParameterSpec);
keyPair = keyPairGenerator.generateKeyPair();
} catch (Exception ex) {
throw new IllegalStateException(ex);
}
return keyPair;
}
}