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This package contains core types for Azure Java clients.

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

package com.azure.core.credential;

import com.azure.core.util.Base64Util;
import reactor.core.publisher.Mono;

import java.nio.charset.StandardCharsets;
import java.time.OffsetDateTime;

/**
 * 
 * The {@link BasicAuthenticationCredential} is used to authenticate and authorize requests made to
 * Azure services using the Basic authentication scheme. Basic Authentication is a simple authentication scheme
 * that uses a combination of a username and password.
 * 
 *
 * 
 * Note that Basic Authentication is generally considered less secure than other authentication methods,
 * such as Azure Active Directory (AAD) authentication. It is recommended to use
 * Azure Active Directory (Azure AD)
 * authentication via {@link TokenCredential} whenever possible, especially for production environments.
 * 
 *
 * 
 * Sample: Azure SAS Authentication
 * 
 *
 * 
 * The following code sample demonstrates the creation of a
 * {@link com.azure.core.credential.BasicAuthenticationCredential}, using username and password
 * 
 *
 * 
 *  * BasicAuthenticationCredential basicAuthenticationCredential =
 *     new BasicAuthenticationCredential("<username>", "<password>");
 * 
 * 
 *
 * @see com.azure.core.credential
 * @see com.azure.core.credential.TokenCredential
 */
public class BasicAuthenticationCredential implements TokenCredential {
    /**
     * Base64 encoded username-password credential.
     */
    private final String encodedCredential;

    /**
     * Creates a basic authentication credential.
     *
     * @param username basic auth username
     * @param password basic auth password
     */
    public BasicAuthenticationCredential(String username, String password) {
        String credential = username + ":" + password;
        this.encodedCredential = Base64Util.encodeToString(credential.getBytes(StandardCharsets.UTF_8));
    }

    @Override
    public Mono getToken(TokenRequestContext request) {
        return Mono.fromCallable(() -> new AccessToken(encodedCredential, OffsetDateTime.MAX));
    }

    @Override
    public AccessToken getTokenSync(TokenRequestContext request) {
        return new AccessToken(encodedCredential, OffsetDateTime.MAX);
    }
}