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I tried to decrypt an SSH key, but didn't find ssh2john in Kali Linux. I had downloaded the latest version of Kali and John the Ripper is already pre-installed in it. I used the locate *2john command and can find other John tools, but not ssh2john. Why is this so? If I can't use ssh2john, are there any other tools or methods to replace it to crack the SSH key?

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in Kali you 'll find it there

/usr/share/john/ssh2john.py
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After research, I found that ssh2john not in JTR/src, it's in run:ssh2john.py. So I copy the py file to OS,then use python ssh2john.py id_rsa>idcrack to run. It succeed. Then you can use john idcrack to crack the private key.

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