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Disallow special characters in usernames to prevent confusion with si…
…milarly looking usernames (#11531) Closes #11532 Co-authored-by: Douglas Palmer <dpalmer@redhat.com>
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61 changes: 61 additions & 0 deletions
61
services/src/main/java/org/keycloak/userprofile/validator/UsernameIDNHomographValidator.java
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/* | ||
* Copyright 2021 Red Hat, Inc. and/or its affiliates | ||
* and other 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.keycloak.userprofile.validator; | ||
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import org.keycloak.services.messages.Messages; | ||
import org.keycloak.services.validation.Validation; | ||
import org.keycloak.validate.SimpleValidator; | ||
import org.keycloak.validate.ValidationContext; | ||
import org.keycloak.validate.ValidationError; | ||
import org.keycloak.validate.ValidatorConfig; | ||
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import java.util.List; | ||
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/** | ||
* Validator to check that User Profile username is provided. Expects List of Strings as input. | ||
* | ||
* @author Vlastimil Elias <velias@redhat.com> | ||
* | ||
*/ | ||
public class UsernameIDNHomographValidator implements SimpleValidator { | ||
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public static final String ID = "up-username-not-idn-homograph"; | ||
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@Override | ||
public String getId() { | ||
return ID; | ||
} | ||
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@Override | ||
public ValidationContext validate(Object input, String inputHint, ValidationContext context, ValidatorConfig config) { | ||
@SuppressWarnings("unchecked") | ||
List<String> values = (List<String>) input; | ||
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String value = null; | ||
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if (values != null && !values.isEmpty()) { | ||
value = values.get(0); | ||
} | ||
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if (!Validation.isBlank(value) && !Validation.isUsernameValid(value)) { | ||
context.addError(new ValidationError(ID, value, Messages.INVALID_USERNAME)); | ||
} | ||
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return context; | ||
} | ||
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} |
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