I am curious to know the difference between the data sent over a HTTP connection and over HTTPS connection. I mean, what is the content, how it looks like in both cases. I am able for find for HTTP, but what is the corresponding content if same information is shared over HTTPS? HTTP contains Request Line, Header and Message body. I hope difference will be wrt Message body. Can anyone explain? Certificate content is embedded in this Message body or how is it?
In HTTPS (HTTP over SSL) the HTTP request is performed over a SSL tunel, hence both the HTTP headers and the payload are encrypted.
The certificate is sent by the server when the connection is established, as part of the TLS handshake. Such certificate must be trusted by either the client itself or a party that the client trusts.
Probably this article will give you a better understanding of the handshake.
I am curious to know the difference between the data sent over a HTTP connection and over HTTPS connection.
There is no difference.
I mean, what is the content, how it looks like in both cases.
It is the same in both cases.
I am able for find for HTTP, but what is the corresponding content if same information is shared over HTTPS?
It is the same.
HTTP contains Request Line, Header and Message body.
And so does HTTPS.
I hope difference will be wrt Message body.
The difference is in the fac that the entire payload is encrypted.
Can anyone explain?
I have endeavoured to do so.
Certificate content is embedded in this Message body
No.
or how is it?
It is embedded in the TLS handshake, which precedes any data exchange over the connection, including the entirety of any HTTP content.
Related
https retrieves data from the server in secure way, http or https post method as I know sends data encoded for reassuring sensitive information. If both https and post method secures data what is the difference
HTTP POST request will be sent unencrypted and any middle man in the communication can see the plain text
However with HTTPS all the data is encrypted and only the server can decrypt it to see the data that's coming
You maybe misunderstanding that encoding is not encryption by the way.
I am implementing my own TCP protocol stack and an extremely simple HTTP server on UBoot, and I run into problem that client does not send FIN/ACK after I send FIN/ACK/PSH. Both HTTP and TCP content seems to be right regarding TCP sequence and Ack, and content length, but client only respond with FIN in its first attempt on any URL. Any subsequent attempt on the visited URL does not respond with FIN. Can someone tell me what I am missing in my TCP or HTTP content, that cause the client to not close the connection?
I provided a capture in case anyone is interested in this problem
Link to packet capture
The expected result should be client display the content of the HTTP 404 Not found. However, all I see if browser keeps loading non-stop until the client send a TCP RST, and the browser display Page cannot be found.
In the streams which issues (like tcp.stream eq 1 in the pcap) the 404 from the server does not get acknowledged by the client, which likely means that it is dropped somewhere. In the stream without issues (tcp.stream eq 0) the 404 gets acknowledged. Looking closer at both 404 reveals that the good one has a valid TCP checksum while the dropped one does not. Thus, most likely your TCP checksum calculation is wrong and the client system is dropping these wrong packets so that they never reach the client application.
When a web server receives a http(s) GET request from a client, it has access to some information such as:
The client IP
The request itself :
the headers (including the cookies)
the content
and... that's all ?
I am wondering if there is something else.
Indeed, I am trying to make a server that can access to a page where it can collect some information to update its database. The site denied access to my server but not to web browsers, even if I replicate the IP, the headers and the content.
Thanks for your help.
Yes, it's only what is contained in the request itself. The server cannot reach back to the client to "pull" information, it only has the information contained in the HTTP request and the underlying TCP/IP packet. That's:
the requesting IP address
the HTTP headers, including requested URL and HTTP method
the HTTP request body, if any
if it's HTTPS, any data exchanged during the TLS handshake, which is usually not very relevant for identifying anything significant
All of that information is voluntarily provided by the requesting client.
Just a quick question, and probably a stupid one.
But usually when a client connects to an http server, the server sends them the header and the html, correct?
I'm packet sniffing a realtime-chat, and attempting to reverse engineer a plain text protocol, and it's connected to a http server. This is why I ask, for verification.
Basically, this is correct. Anyways, you have to differentiate between for example GET and POST Requests.
While POST Requests normally have a "real" body with information that they are delivering to the Server, the body of GET Requests is empty for most of the time.
For the responses, your Claim is correct. The Header is sent to tell how big the response is, which MIME Type is used, etc.
What i want to do is to parse the method-type of a HTTPS message using wireshark.
I saw that for a HTTP message I see that for a 'GET' message, on the first row I see 'Get ...'.
Now I want to check the same for a HTTPS message, but I dont see any field flagging the method-type.
What am I missing?
HTTPS is HTTP inside a SSL tunnel. So you need to first decrypt the data of the SSL tunnel before you could find out which method is used. Unless you can get access to the keys of the encryption there is no way to decode the content and get at the HTTP traffic.
HTTPS is HTTP over SSL. The entire HTTP request is encrypted as SSL record and that is what the server receives. And server/client reach this stage only on setting up the SSL tunnel successfully. You need to invoke appropriate methods to unwrap the SSL layer and get the application data.
I assume you are trying to decode it from Wireshark. You will need to posses the server's private key to get the data out. Wireshark has the means to load the key. It shall then display the decrypted data in the capture. - http://support.citrix.com/article/CTX116557