Re: need help to decrypt SSL packets

["Sake Blok" <sake () euronet nl>]

Well, wireshark uses GnuTLS instead of OpenSSL, I'm not sure which version of GnuTLS was the first one to include 4K 
key support, but it must have been supporting it for a while as my tshark (1.3.0) is built with version 2.0.4 (which is 
2 years old) and it is capable of importing 4K keys.

If I look at your file size (3264 bytes) and compare it the the size of my 4K key file (3243 bytes), there must be some 
extra data in your file that OpenSSL can skip, but GnuTLS can't. It can't be an extra CR after each line, as that would 
have added 51 extra characters instead of 21.

Could it be a paging message or maybe coloring escape codes? Try using "od -c /tmp/esd.key" to see whether there are 
escape codes in the file that "more" might use instead of display.

I looked at the source code and the only place that this error message can be generated is when the function 
"gnutls_x509_privkey_import" fails. At this point in the code, the key has already been succesfully read from file. So 
it's definately not a permission or IO issue, it's a conversion issue.

Hope this helps,
Cheers,


Sake

----- Original Message ----- 
  From: Arnold Wang 
  To: Community support list for Wireshark 
  Sent: Thursday, November 05, 2009 6:39 PM
  Subject: Re: [Wireshark-users] need help to decrypt SSL packets


  I used ssl decryption before and this is the first time run into this particular problem, couldn't read the key file. 
This is the first time I tried to read a 4096-bit key. However since openssl seems have no problem reading it, I would 
assume wireshark should be able to as well.

  The permission seems ok. 

  [awang@arnoldw tmp]$ ls -l /tmp/esd.key

  -rw-r--r--. 1 awang users 3264 2009-11-05 09:28 /tmp/esd.key

  [awang@arnoldw tmp]$ ls -l `which wireshark`

  lrwxrwxrwx. 1 root root 13 2009-11-04 14:23 /usr/bin/wireshark -> consolehelper

  [awang@arnoldw tmp]$ ls -l `which openssl`

  -rwxr-xr-x. 1 root root 444640 2009-05-21 09:47 /usr/bin/openssl

  BTW, the error happens before I even open the trace file so it has nothing to do with it. Unfortunately, I can't 
upload the whole private key since it's for one of our public production site.

  Thanks for the help. 

   

  From: wireshark-users-bounces () wireshark org [mailto:wireshark-users-bounces () wireshark org] On Behalf Of Sake 
Blok
  Sent: Wednesday, November 04, 2009 2:56 PM
  To: Community support list for Wireshark
  Subject: Re: [Wireshark-users] need help to decrypt SSL packets

   

  Seems you are doing the right thing.

   

  Are you able to decrypt ssl traffic in other tracefiles  with other keys? Or was this your first try?

   

  Could you share the output of:

   

  ls -l /tmp/esd.key

  ls -l `which wireshark`

  ls -l `which openssl`

   

  .. to see whether it could be a permission problem?

   

  And are you able to share the tracefile and key or are they from a production environment?

   

  Cheers,

      Sake

    ----- Original Message ----- 

    From: Arnold Wang 

    To: 'wireshark-users () wireshark org' 

    Sent: Tuesday, November 03, 2009 9:07 PM

    Subject: [Wireshark-users] need help to decrypt SSL packets

     

    I'm running Wireshark 1.1.3 comes with Fedora 11. When I tried to decode the captured FTPS traffics, I'm running 
into trouble to load the private key into Wireshark. I got the following error message when I started Wireshark:

    ssl_init keys string:

    10.x.100.25,990,ftps,/tmp/esd.key

    ssl_init found host entry 10.x.100.25,990,ftps,/tmp/esd.key

    ssl_init addr '10.x.100.25' port '990' filename '/tmp/esd.key' password(only fo

    r p12 file) '(null)'

    ssl_load_key: can't import pem data

    As far as I can tell, the private key looks OK.

    [awang@mars tmp]$ more esd.key 

    -----BEGIN PRIVATE KEY-----

    MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQDuYd7gPiqjx/+pFfQ0QhHhUBR5

    t8WDrji+N7QEmmULguE+MJiku4de35EjrlR5PkW6voZ+/xpKjNQvqpi6YI/IzBEgS4b61zreBM55

    ..

    paDoKh7nJpUz+PlQ9YuOUtSXuadQMqsqipYY9CygeQD8xZMopfcrb+obifGZrgfP3KYpTT5mUxld

    z/qpPf+Cs+pvgBzzYu4AIaCMG+8lqeS2cD2z8jOavSonRcOfMw==

    -----END PRIVATE KEY-----

    [awang@mars tmp]$ openssl rsa -inform pem -in esd.key -noout -text

    Private-Key: (4096 bit)

    modulus:

        00:ee:61:de:e0:3e:2a:a3:c7:ff:a9:15:f4:34:42:

        11:e1:50:14:79:b7:c5:83:ae:38:be:37:b4:04:9a:

    ..

    What did I miss? 

    Thanks.


----------------------------------------------------------------------------

    ___________________________________________________________________________
    Sent via:    Wireshark-users mailing list <wireshark-users () wireshark org>
    Archives:    http://www.wireshark.org/lists/wireshark-users
    Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
                 mailto:wireshark-users-request () wireshark org?subject=unsubscribe



------------------------------------------------------------------------------


  ___________________________________________________________________________
  Sent via:    Wireshark-users mailing list <wireshark-users () wireshark org>
  Archives:    http://www.wireshark.org/lists/wireshark-users
  Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
               mailto:wireshark-users-request () wireshark org?subject=unsubscribe

___________________________________________________________________________
Sent via:    Wireshark-users mailing list <wireshark-users () wireshark org>
Archives:    http://www.wireshark.org/lists/wireshark-users
Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
             mailto:wireshark-users-request () wireshark org?subject=unsubscribe