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/*
* JBoss, Home of Professional Open Source.
* Copyright 2015 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 org.wildfly.security.credential;
import static org.wildfly.security.provider.util.ProviderUtil.INSTALLED_PROVIDERS;
import java.security.KeyStore;
import java.security.Provider;
import java.security.cert.X509Certificate;
import java.security.spec.AlgorithmParameterSpec;
import java.util.function.Function;
import java.util.function.Supplier;
import org.wildfly.common.Assert;
import org.wildfly.security.evidence.AlgorithmEvidence;
import org.wildfly.security.evidence.Evidence;
import org.wildfly.security.keystore.PasswordEntry;
import org.wildfly.security.x500.X500;
/**
* A credential is a piece of information that can be used to verify or produce evidence.
*/
public interface Credential extends Cloneable {
/**
* An array with no credentials.
*/
Credential[] NO_CREDENTIALS = new Credential[0];
/**
* Determine whether this credential can, generally speaking, verify the given evidence type.
*
* @param evidenceClass the evidence type (must not be {@code null})
* @param algorithmName the evidence algorithm name (may be {@code null} if the type of evidence does not support
* algorithm names)
*
* @return {@code true} if the evidence can be verified by this credential, {@code false} otherwise
*/
default boolean canVerify(Class evidenceClass, String algorithmName) {
Assert.checkNotNullParam("evidenceClass", evidenceClass);
return false;
}
/**
* Determine whether this credential can verify the given evidence.
*
* @param evidence the evidence (must not be {@code null})
*
* @return {@code true} if the evidence can be verified by this credential, {@code false} otherwise
*/
default boolean canVerify(Evidence evidence) {
Assert.checkNotNullParam("evidence", evidence);
return canVerify(evidence.getClass(), evidence instanceof AlgorithmEvidence ? ((AlgorithmEvidence) evidence).getAlgorithm() : null);
}
/**
* Verify the given evidence.
*
* @param evidence the evidence to verify (must not be {@code null})
*
* @return {@code true} if the evidence is verified, {@code false} otherwise
*/
default boolean verify(Evidence evidence) {
return verify(INSTALLED_PROVIDERS, evidence);
}
/**
* Verify the given evidence.
*
* @param providerSupplier the provider supplier to use for verification purposes
* @param evidence the evidence to verify (must not be {@code null})
*
* @return {@code true} if the evidence is verified, {@code false} otherwise
*/
default boolean verify(Supplier providerSupplier, Evidence evidence) {
Assert.checkNotNullParam("providerSupplier", providerSupplier);
Assert.checkNotNullParam("evidence", evidence);
return false;
}
/**
* Cast this credential type if the type, algorithm, and parameters match.
*
* @param credentialType the credential type class to check
* @param algorithmName the name of the algorithm or {@code null} if any algorithm is acceptable
* @param parameterSpec the parameter specification or {@code null} if any parameter specification is acceptable
* @param the credential type
* @return the credential cast as the target type, or {@code null} if the credential does not match the criteria
*/
default C castAs(Class credentialType, String algorithmName, AlgorithmParameterSpec parameterSpec) {
return castAndApply(credentialType, algorithmName, parameterSpec, Function.identity());
}
/**
* Cast this credential type if the type and algorithm matches.
*
* @param credentialType the credential type class to check
* @param algorithmName the name of the algorithm or {@code null} if any algorithm is acceptable
* @param the credential type
* @return the credential cast as the target type, or {@code null} if the credential does not match the criteria
*/
default C castAs(Class credentialType, String algorithmName) {
return castAndApply(credentialType, algorithmName, Function.identity());
}
/**
* Cast this credential type if the type matches.
*
* @param credentialType the credential type class to check
* @param the credential type
* @return the credential cast as the target type, or {@code null} if the credential does not match the criteria
*/
default C castAs(Class credentialType) {
return castAndApply(credentialType, Function.identity());
}
/**
* Cast this credential type and apply a function if the type matches.
*
* @param credentialType the credential type class to check
* @param algorithmName the name of the algorithm or {@code null} if any algorithm is acceptable
* @param parameterSpec the parameter specification or {@code null} if any parameter specification is acceptable
* @param function the function to apply
* @param the credential type
* @param the return type
* @return the result of the function, or {@code null} if the credential is not of the given type
*/
default R castAndApply(Class credentialType, String algorithmName, AlgorithmParameterSpec parameterSpec, Function function) {
return matches(credentialType, algorithmName, parameterSpec) ? function.apply(credentialType.cast(this)) : null;
}
/**
* Cast this credential type and apply a function if the type matches.
*
* @param credentialType the credential type class to check
* @param algorithmName the name of the algorithm or {@code null} if any algorithm is acceptable
* @param function the function to apply
* @param the credential type
* @param the return type
* @return the result of the function, or {@code null} if the credential is not of the given type
*/
default R castAndApply(Class credentialType, String algorithmName, Function function) {
return matches(credentialType, algorithmName, null) ? function.apply(credentialType.cast(this)) : null;
}
/**
* Cast this credential type and apply a function if the type matches.
*
* @param credentialType the credential type class to check
* @param function the function to apply
* @param the credential type
* @param the return type
* @return the result of the function, or {@code null} if the credential is not of the given type
*/
default R castAndApply(Class credentialType, Function function) {
return credentialType.isInstance(this) ? function.apply(credentialType.cast(this)) : null;
}
/**
* Creates and returns a copy of this {@link Credential}.
*
* @return a copy of this {@link Credential}.
*/
Credential clone();
/**
* Determine if this credential is the same kind of credential as the given credential.
*
* @param other the other credential
* @return {@code true} if the credentials are of the same kind, {@code false} otherwise
*/
default boolean matches(Credential other) {
return other instanceof AlgorithmCredential ? matches((AlgorithmCredential) other) : other != null && getClass() == other.getClass();
}
/**
* Determine if this credential is the same kind of credential as the given credential.
*
* @param other the other credential
* @return {@code true} if the credentials are of the same kind, {@code false} otherwise
*/
default boolean matches(AlgorithmCredential other) {
return false;
}
/**
* Determine if this credential matches the given criteria.
*
* @param credentialType the credential type class to check
* @param algorithmName the name of the algorithm or {@code null} if any algorithm is acceptable
* @param parameterSpec the parameter specification or {@code null} if any parameter specification is acceptable
* @return {@code true} if the credential matches the specification, {@code false} otherwise
*/
default boolean matches(Class credentialType, String algorithmName, AlgorithmParameterSpec parameterSpec) {
return credentialType.isInstance(this) && algorithmName == null && parameterSpec == null;
}
/**
* Convert a key store entry into a credential object.
*
* @param keyStoreEntry the key store entry to convert (must not be {@code null})
* @return the corresponding credential, or {@code null} if the entry type is unrecognized
*/
static Credential fromKeyStoreEntry(KeyStore.Entry keyStoreEntry) {
Assert.checkNotNullParam("keyStoreEntry", keyStoreEntry);
if (keyStoreEntry instanceof PasswordEntry) {
return new PasswordCredential(((PasswordEntry) keyStoreEntry).getPassword());
} else if (keyStoreEntry instanceof KeyStore.PrivateKeyEntry) {
return new X509CertificateChainPrivateCredential(((KeyStore.PrivateKeyEntry) keyStoreEntry).getPrivateKey(), X500.asX509CertificateArray(((KeyStore.PrivateKeyEntry) keyStoreEntry).getCertificateChain()));
} else if (keyStoreEntry instanceof KeyStore.TrustedCertificateEntry) {
return new X509CertificateChainPublicCredential((X509Certificate) ((KeyStore.TrustedCertificateEntry) keyStoreEntry).getTrustedCertificate());
} else if (keyStoreEntry instanceof KeyStore.SecretKeyEntry) {
return new SecretKeyCredential(((KeyStore.SecretKeyEntry) keyStoreEntry).getSecretKey());
} else {
return null;
}
}
}
