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/*
 * Copyright 2020 The gRPC 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 io.grpc;

/**
 * Represents a security configuration to be used for channels. There is no generic mechanism for
 * processing arbitrary {@code ChannelCredentials}; the consumer of the credential (the channel)
 * must support each implementation explicitly and separately. Consumers are not required to support
 * all types or even all possible configurations for types that are partially supported, but they
 * must at least fully support {@link ChoiceChannelCredentials}.
 *
 * 

A {@code ChannelCredential} provides client identity and authenticates the server. This is * different from {@link CallCredentials}, which only provides client identity. They can also * influence types of encryption used and similar security configuration. * *

The concrete credential type should not be relevant to most users of the API and may be an * implementation decision. Users should generally use the {@code ChannelCredentials} type for * variables instead of the concrete type. Freshly-constructed credentials should be returned as * {@code ChannelCredentials} instead of a concrete type to encourage this pattern. Concrete types * would only be used after {@code instanceof} checks (which must consider * {@code ChoiceChannelCredentials}!). */ public abstract class ChannelCredentials { /** * Returns the ChannelCredentials stripped of its CallCredentials. In the future, * this may strip only some of the CallCredentials, preserving call credentials * that are safe from replay attacks (e.g., if the token is bound to the * channel's certificate). * * @since 1.35.0 */ public abstract ChannelCredentials withoutBearerTokens(); }





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