04-06-2015, 04:03 PM
I'm currently trying to make HMAC-SHA1 cracking work with hashcat. To make thing easier, I precomputed a digest with a known "message" and "secret".
Basically, we know that:
secret: "key"
message: "The quick brown fox jumps over the lazy dog"
digest: de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9
Now, I want to test hashcat by cracking the secret using the mask attack mode given the digest and message.
Using the command below, hashcat wasn't able to find the key. What am I doing wrong?
Code:
$ echo -n "The quick brown fox jumps over the lazy dog" | openssl dgst -sha1 -hmac "key"
de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9Basically, we know that:
secret: "key"
message: "The quick brown fox jumps over the lazy dog"
digest: de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9
Now, I want to test hashcat by cracking the secret using the mask attack mode given the digest and message.
Using the command below, hashcat wasn't able to find the key. What am I doing wrong?
Code:
$ ./cudaHashcat64.exe -m 150 -a 3 --increment --increment-min=3 --increment-max=3 de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9:"The quick brown fox jumps over the lazy dog" ?l?l?lQuote:cudaHashcat v1.35 starting...
Device #1: GeForce GTX 750, 1024MB, 1084Mhz, 4MCU
Device #1: WARNING! Kernel exec timeout is not disabled, it might cause you errors of code 702
You can disable it with a regpatch, see here: https://hashcat.net/wiki/doku.php?id=timeout
_patch
Hashes: 1 hashes; 1 unique digests, 1 unique salts
Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes, 0/1 rotates
Applicable Optimizers:
* Zero-Byte
* Not-Iterated
* Single-Hash
* Single-Salt
* Brute-Force
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 80c
Device #1: Kernel c:\Users\xxx\cudaHashcat-1.35/kernels/4318/m00150_a3.sm_50.64.ptx
Device #1: Kernel c:\Users\xxx\cudaHashcat-1.35/kernels/4318/markov_be_v4.64.ptx
ATTENTION!
The wordlist or mask you are using is too small.
Therefore, oclHashcat is unable to utilize the full parallelization power of your GPU(s).
The cracking speed will drop.
Workaround: https://hashcat.net/forum/thread-4161.html
Session.Name...: cudaHashcat
Status.........: Exhausted
Input.Mode.....: Mask (?l?l?l) [3]
Hash.Target....: de7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9:The quick brown fox jumps over the lazy do
g
Hash.Type......: HMAC-SHA1 (key = $pass)
Time.Started...: 0 secs
Time.Estimated.: 0 secs
Speed.GPU.#1...: 7891.0 kH/s
Recovered......: 0/1 (0.00%) Digests, 0/1 (0.00%) Salts
Progress.......: 17576/17576 (100.00%)
Skipped........: 0/17576 (0.00%)
Rejected.......: 0/17576 (0.00%)
HWMon.GPU.#1...: 0% Util, 30c Temp, N/A Fan
Started: Mon Apr 06 09:51:25 2015
Stopped: Mon Apr 06 09:51:27 2015