Construct basic auth header java

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Construct basic auth header java

Basic authentication has a certain limitation and it might not fit in to all use cases. We will extend this article to see how to implement a token bases security feature with Spring. We will use Spring Boot and Maven to handle the dependencies. As we are building the Spring Boot web application, we will use following staters for our application.

I am keeping this application simple at the database level, I will use a single table to store user details and token. There will be no token against user profile till they request application to create one and return this token. This is how the table structure look like:.

This is not a production ready table, but the main idea is to store the token for the customer profile and use this token for authentication and authorization. To save and get the token information for customer profile, we need to create a custom repository. This repository is responsible to get customer information based on the token. Customer service will use our customer repository to get the customer details based on the token or to perform the login. In this section, we will talk about following classes:.

The AuthenticationProvider is responsible to find user based on the authentication token sent by the client in the header. This is how our Spring based token authentication provider looks like:. Our AuthenticationProvider use the CustomerService to find a customer based on the token. The token authentication filter is responsible to get the authentication filter from the header and call the authentication manager for authentication.

This is how the authentication filter looks like:. This is responsible to club everything together. In the next step, we will setup a simple Spring Boot web application to test our workflow.

This is the secure controller. It will return user profile for a valid token. This controller is only accessible on passing a valid token:.

construct basic auth header java

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I believe this is not possible, but someone I know insisted that it works. I don't even know what parameters to try, and I haven't found this documented anywhere. It is indeed not possible to pass the username and password via query parameters in standard HTTP auth. It's possible that whoever you were speaking to was thinking of a custom module or code that looked at the query parameters and verified the credentials. This isn't standard HTTP auth, though, it's an application-specific thing.

Microsoft Knowledge Base. There is an Authorization header field for this purpose check it here: http header list. How to use it is written here: Basic access authentication. There you can also read that although it is still supported by some browsers the suggested solution of adding the Basic authorization credentials in the url is not recommended.

Read also chapter 4. When using OAuth or other authentication services you can often also send your access token in a query string instead of in an authorization header, so something like:.

But not for IE, which no longer support basic authentication. I implemented this using SSRSwhich hides the username and password. I would recommend you test this with an Incognito Browser. Test with and without the password in different Incognito browsers. The one without the password should ask you for the password. It is obviously possible to send any string in the GET parameters, although not recommended to send login and password as can make it highly visible, especially if it's not in an AJAX request.

You will however, need to then code the server page to extract the login and password and then validate and use them in whatever way is required.

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construct basic auth header java

Asked 8 years, 1 month ago. Active 4 months ago.One of the most common headers is call Authorization.

Basic Authentication Header Generator

Wait a minute, we are talking about authentication but why the Authorization header? The distinction between authentication and authorization is important in understanding how RESTful APIs are working and why connection attempts are either accepted or denied:.

Authentication is the verification of the credentials of the connection attempt. This process consists of sending the credentials from the remote access client to the remote access server in an either plaintext or encrypted form by using an authentication protocol.

Authorization is the verification that the connection attempt is allowed. Authorization occurs after successful authentication. In other words: Authentication is stating that you are who are you are and Authorization is asking if you have access to a certain resource.

I know that it is a bit confusing that in REST APIs we are using the Authorization header for doing Authentication or both but if we remember that when calling an API we are requesting an access to certain resource it means that the server should know whether it should give access to that resource or not, hence when developing and designing RESTful API Authorization header sounds just fine. The most simple way to deal with authentication is to use HTTP basic authentication.

We use a special HTTP header where we add 'username:password' encoded in base Note that even though your credentials are encoded, they are not encrypted! It is very easy to retrieve the username and password from a basic authentication. One of the downsides of basic authentication is that we need to send over the password on every request.

Also, it does not safeguard against tampering of headers or body. Another way is to use HMAC hash based message authentication. Instead of having passwords that need to be sent over, we actually send a hashed version of the password, together with more information. Let's assume we have the following credentials: username "username", password "secret".

We could add other information as well, like the current timestamp, a random number, or the md5 of the message body in order to prevent tampering of the body, or prevent replay attacks. Next, we generate a hmac:. Right now, the server knows the user "username" tries to access the resource.

The server can generate the digest as well, since it has all information. Please note that the "password" is not encrypted on the server, as the server needs to know the actual value. This is why te name "secret" is preffered and not a "password". Even if a hacker was listening in on the conversation, they could not use the authentication information to POST data to user's account details, or look at some other users accounts, or any other URL, as this would change the digest and the hacker does not have the secret that both the server and client has.

However, the hacker could access user's account whenever it wants since it doesn't change the digest. This is why many times more information is send over, like the current time, and a nonce:.

10 Spring Security Basic Auth with Postman

We added two extra pieces of information. The current date and a number that we only use once nonce. The server can reconstruct the digest again, since the client sends over the nonce and date. When the date is not in a certain range of the current servers time say, 10 minutesthe server can ignore the message, as it probably is a replay of an earlier send message note: either that, or the server or clients time is wrong. This is a common issue when dealing with time-limited authentications!

HttpClient basic authentication

The nonce is a number we only use once.In the previous tutorials, we have had our hands on Postman and learned how to use it in real life. We discussed about the pre request script and how we can dynamically change the values of variables before sending the requests. In postman navigation we learned that we need Authorization for accessing secured servers.

Authorization is the most important part while working with secured servers, which is most likely to happen. We will learn about.

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The meaning of authorization can be seen as a question which is, are we eligible to access a secured resource on the Server? If the answer is yes, then in technical terms we can say that we are Authorized to access the resource. If the answer is No, we can say that we are not Authorized to access the resource.

You and your sister can open the same mobile phone, which means only you and your sister are authorized to open the phone and see the data.

Similarly, while there could be many APIs in a company or a project. It is not necessary that everyone will have access on all the APIs. Only authorized people can access the secured APIs. Authorization and Authentication are two closely related terms. These two terms can also be confusing at first.

In this section, we will clear the confusion about these two terms. Authentication is a process of presenting your credentials to the system and the system validating your credentials. These credentials tell the sys tem about who you are.

Here system can be anything, it can be a computer, phone, bank or any physical office premises. Whereas Authorization is a process of allowing or denying someone from accessing something, once Authentication is done.

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So in layman terms Authentication tells who you are while Authorization tells what you can do. If it is, you are good to go Authentication. If you have access to the resource, then you will be granted access to the resource Authorized. We will see the following short example to tell you how does a server rejects unauthorized person.

Later in the tutorial, we will try to access the same API using the credentials as we discussed in the last section.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

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Sometimes you want to add dynamic parameters in the URL, you can easily do that by adding a placeholder in the URL, and then by setting the route parameters with the routeParam function, like:.

Request headers can be added with the header method. Unirest exposes a shortcut for doing basic auth when you need to. Unirest handles the Base64 encoding part. You can post entity objects as the full body easily. This is the default behavior of most REST services.

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You can also post as a Object that is serialized using a configured ObjectMapper. Unirest comes with a default mapper that will serialize to json using the popular Google Gson library. Basic http name value body params can be passed with simple field calls.

For large files you may want to use a InputStream. Pass it a file name if you want one. If you are uploading large files you might want to provide some time of progress bar to a user. You can monitor this progress by providing a ProgresMonitor. Sometimes, well most of the time, you want your application to be asynchronous and not block, Unirest supports this in Java using anonymous callbacks, or direct method placement.

All request types also support async versions. Sometimes services offer paged requests. How this is done is not standardized but Unirest proves a mechanism to follow pages until all have been consumed.

You must provide two functions for extracting the next page. The first is to get the HttpResponse in the format you want, the other is to extract the next link from the response.

The paged list has some handy methods for dealing with the results. Here we are getting a paged list of Dogs where the next link is in the headers. In case you need to use a custom client certificate to call a service you can provide unirest with a custom keystore.

Sometimes you need to tunnel through a proxy. Unirest can be configured to do this.HTTP provides a general framework for access control and authentication. RFC defines the HTTP authentication framework which can be used by a server to challenge a client request and by a client to provide authentication information.

The challenge and response flow works like this: The server responds to a client with a Unauthorized response status and provides information on how to authorize with a WWW-Authenticate response header containing at least one challenge. A client that wants to authenticate itself with a server can then do so by including an Authorization request header field with the credentials.

Usually a client will present a password prompt to the user and will then issue the request including the correct Authorization header. The same challenge and response mechanism can be used for proxy authentication. In this case, it is an intermediate proxy that requires authentication.

As both resource authentication and proxy authentication can coexist, a different set of headers and status codes is needed. In the case of proxies, the challenging status code is Proxy Authentication Requiredthe Proxy-Authenticate response header contains at least one challenge applicable to the proxy, and the Proxy-Authorization request header is used for providing the credentials to the proxy server.

If a proxy server receives valid credentials that are not adequate to gain access for a given resource, the server should respond with the Forbidden status code. A potential security hole that has recently been fixed by browsers is authentication of cross-site images. Browsers use utf-8 encoding for usernames and passwords. The WWW-Authenticate and Proxy-Authenticate response headers define the authentication method that should be used to gain access to a resource.

They need to specify which authentication scheme is used, so that the client that wishes to authorize knows how to provide the credentials.

The syntax for these headers is the following:. The realm is used to describe the protected area or to indicate the scope of protection.

construct basic auth header java

This could be a message like "Access to the staging site" or similar, so that the user knows to which space they are trying to get access to. Here, the type is needed again followed by the credentials, which can be encoded or encrypted depending on which authentication scheme is used. The general HTTP authentication framework is used by several authentication schemes. Schemes can differ in security strength and in their availability in client or server software. The most common authentication scheme is the "Basic" authentication scheme which is introduced in more details below.

Common authentication schemes include:.

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Without these additional security enhancements, basic authentication should not be used to protect sensitive or valuable information. To password-protect a directory on an Apache server, you will need a. You cannot see the actual passwords as they are encrypted md5 in this case. Note that you can name your. Apache is usually configured to prevent access to. Many clients also let you avoid the login prompt by using an encoded URL containing the username and the password like this:.


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