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#1 2014-01-09 04:10:38
- daos
- Contributor
- Registered: 2013-09-09
- Posts: 18
what it say into a card ?
Hi everyone !
Since I have been working in the Mifare Cards I could not decipher the data dump so I have a couple of cuestions if you don't mind
1) dump cards are encrypted to chiphertext (AES or DES) there is any program to know its contents.
2) I know that the card has a MAD (Mifare application directory) How I deciphered?
Regards my friends
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#2 2014-01-09 08:55:49
- midnitesnake
- Contributor
- Registered: 2012-05-11
- Posts: 151
Re: what it say into a card ?
MAD (Mifare Application Directory), some handy links:
http://www.nxp.com/documents/application_note/AN10787.pdf
git clone https://github.com/dpavlin/perl-Mifare-MAD.git
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#3 2014-01-09 17:52:24
- asper
- Contributor
- Registered: 2008-08-24
- Posts: 1,409
Re: what it say into a card ?
A very very brief MAD example:
SECTOR 0
Last edited by asper (2014-01-09 17:53:03)
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#4 2014-01-10 03:32:41
- daos
- Contributor
- Registered: 2013-09-09
- Posts: 18
Re: what it say into a card ?
Thanks to both of you.
midnitesnake : I taken a look to the source code but it's only work if I have the hex data. It must decrypt the data first.
asper : thanks to the brief MAD example, but it´s the same previous answer-
Is there any way to decrypt or break the DES or AES?
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#5 2014-01-10 08:53:08
- asper
- Contributor
- Registered: 2008-08-24
- Posts: 1,409
Re: what it say into a card ?
No way to break them actually.
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#6 2014-01-10 17:32:57
- daos
- Contributor
- Registered: 2013-09-09
- Posts: 18
Re: what it say into a card ?
I don't think so, I found this
http://www.gnu.org/software/libgcrypt/
I will study more
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#7 2014-01-10 19:03:00
- asper
- Contributor
- Registered: 2008-08-24
- Posts: 1,409
Re: what it say into a card ?
These are crypto libraries. To decrypt without knowing cryptographic keys you need to "crack" so "no way to break them actually".
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#8 2014-01-19 04:09:09
- daos
- Contributor
- Registered: 2013-09-09
- Posts: 18
Re: what it say into a card ?
You are right, These are crypto libraries then I started how to decrypt these "cryptographic keys" and I found this page that describes how to find keys http://gelvaos.blogspot.fr/2011/01/how- … sword.html its very interesting.
The proyect is https://github.com/gelvaos/clj-mifare-pass
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#9 2014-01-19 08:22:52
- asper
- Contributor
- Registered: 2008-08-24
- Posts: 1,409
Re: what it say into a card ?
The 1st link is NOT "how to find/recover DES keys" is "how to GENERATE keys" using the provided 3DES algo so, again, no crack is possible.
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