openwall/john

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John the Ripper jumbo - advanced offline password cracker, which supports hundreds of hash and cipher types, and runs on many operating systems, CPUs, GPUs, and even some FPGAs

Stars: 13.6k
Forks: 2.6k
Open beginner issues: 2
Indexed issues: 498

Dominant language: C
License: No license data
Last GitHub push: Aug 1, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

5 beginner-friendly issues open

pdf2john.py incorrectly defaults to 40-bit key length in V4/R4 PDF Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

openwall/john#6033 · 3 comments · Opened Sep 1, 2026
pdf2john emits empty hash for encrypted PDFs with space-padded xref offsets Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

openwall/john#6018 · 4 comments · Opened Jul 22, 2026
Modify issue template to keep unwanted issues out Open

documentation RFC / discussion

Difficulty 2/5 1-3 hours Newbie friendliness 63/100

openwall/john#6002 · 1 comment · Opened Jun 23, 2026
PDF Permissions value is treated as an unsigned integer in PDF2John Open

enhancement outdated

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

openwall/john#5992 · 4 comments · Opened May 31, 2026
Stack buffer overflow in genmkvpwd due to excessive max_len parameter Open

bug maintenance/cleanup

Difficulty 2/5 1-3 hours Newbie friendliness 70/100

openwall/john#5797 · 3 comments · Opened Jul 3, 2025

openwall/john

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