Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

when are the certificates exchanged in a TLS session

Posted on 2016-10-04
1
Medium Priority
?
420 Views
Last Modified: 2016-10-05
HI,
I have the following TLS capture in wireshark , This contains Change cipher spec, server hello, ...
But doesnt contain certificate entry. Also i dont see any certificate in the wireshark capture.
Is it possible that the server didnt sent any certificate ?
How do i find out the entry where server sent the certificate in the wireshark capture ?

Frame 60: 222 bytes on wire (1776 bits), 222 bytes captured (1776 bits) on interface 0
Ethernet II, Src: Procurve_a0:c7:80 (c0:91:34:a0:c7:80), Dst: Apple_f3:ac:2a (24:a0:74:f3:ac:2a)
Internet Protocol Version 4, Src: 52.84.105.126, Dst: 172.16.44.155
Transmission Control Protocol, Src Port: 443, Dst Port: 55760, Seq: 1, Ack: 518, Len: 156
Secure Sockets Layer
    TLSv1.2 Record Layer: Handshake Protocol: Server Hello
        Content Type: Handshake (22)
        Version: TLS 1.2 (0x0303)
        Length: 100
        Handshake Protocol: Server Hello
            Handshake Type: Server Hello (2)
            Length: 96
            Version: TLS 1.2 (0x0303)
            Random
                GMT Unix Time: Dec 19, 1984 05:08:32.000000000 IST
                Random Bytes: 067f9f079aca9da31cdecec70c54428376a38194d9134f2a...
            Session ID Length: 32
            Session ID: 87bfb9dc500ea382098ff6c23756e43c13d25f302d3a311e...
            Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
            Compression Method: null (0)
            Extensions Length: 24
            Extension: renegotiation_info
                Type: renegotiation_info (0xff01)
                Length: 1
                Renegotiation Info extension
                    Renegotiation info extension length: 0
            Extension: status_request
                Type: status_request (0x0005)
                Length: 0
            Extension: Application Layer Protocol Negotiation
                Type: Application Layer Protocol Negotiation (0x0010)
                Length: 11
                ALPN Extension Length: 9
                ALPN Protocol
                    ALPN string length: 8
                    ALPN Next Protocol: http/1.1
    TLSv1.2 Record Layer: Change Cipher Spec Protocol: Change Cipher Spec
        Content Type: Change Cipher Spec (20)
        Version: TLS 1.2 (0x0303)
        Length: 1
        Change Cipher Spec Message
            [Expert Info (Note/Sequence): This session reuses previously negotiated keys (Session resumption)]
                [This session reuses previously negotiated keys (Session resumption)]
                [Severity level: Note]
                [Group: Sequence]
    TLSv1.2 Record Layer: Handshake Protocol: Encrypted Handshake Message
        Content Type: Handshake (22)
        Version: TLS 1.2 (0x0303)
        Length: 40
        Handshake Protocol: Encrypted Handshake Message

Open in new window


Thanks
0
Comment
Question by:Rohit Bajaj
1 Comment
 
LVL 24

Accepted Solution

by:
Dirk Kotte earned 2000 total points
ID: 41829270
take a look to this flowchart: https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/SSL_handshake_with_two_way_authentication_with_certificates.svg/1280px-SSL_handshake_with_two_way_authentication_with_certificates.svg.png

i think you captured the first packet from server to client (the last from phase 1)
this packets don't contain the certificate.
take a look to the next packets. there must be a bigger one.
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is a collection of issues that people face from time to time and possible solutions to those issues. I hope you enjoy reading it.
This article is in regards to the Cisco QSFP-4SFP10G-CU1M cables, which are designed to uplink/downlink 40GB ports to 10GB SFP ports. I recently experienced this and found very little configuration documentation on how these are supposed to be confi…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
Suggested Courses

926 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question