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

498 open issues indexed

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
ZIP password recovery on Windows Open

question

Difficulty 5/5 Over a week Newbie friendliness 15/100

openwall/john#6030 · 22 comments · Opened Aug 20, 2026
dmg2john extracts uncrackable hashes from current DMG files Open

bug

openwall/john#6028 · 4 comments · 1 assignee · Opened Aug 13, 2026
7z2john.pl: unsupported coders/filters Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openwall/john#6027 · 1 comment · Opened Aug 11, 2026
Keystore format segmentation fault for 33+ threads Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openwall/john#6026 · 1 comment · Opened Aug 11, 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
Update old RAKP formats for consistency with new ones Open

maintenance/cleanup

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

openwall/john#6017 · 2 comments · Opened Jul 21, 2026
Add support for WordPress 6.8+ bcrypt password hashes ($wp$2y$) Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

openwall/john#6016 · 2 reactions · Opened Jul 20, 2026
Command injection in bundled `netntlm.pl` via shell metacharacters in the capture file name Open

RFC / discussion

Difficulty 4/5 3-5 days Newbie friendliness 52/100

openwall/john#6011 · 3 comments · Opened Jul 12, 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
Native executables for Windows 11 ARM64 Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

openwall/john#5981 · 1 comment · Opened May 1, 2026
bitcoin-opencl fails self test on Arc B60 Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

openwall/john#5977 · 5 comments · Opened Apr 20, 2026
keyring2john / keyring module issue - update required? Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5961 · 2 comments · Opened Mar 11, 2026
Mute single mode output when there is no words to work with Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

openwall/john#5945 · 7 comments · Opened Jan 21, 2026
argon2-opencl: rusticl misdetected as ancient AMD Catalyst, doesn't recognize asm Open

portability

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5941 · 15 comments · Opened Jan 11, 2026
Update hashcat mode with new rules Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5905 · 4 comments · Opened Nov 21, 2025
OpenCL format memory leaks Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openwall/john#5893 · Opened Nov 16, 2025
Consider dropping -Os from OPT_INLINE Open

core branch enhancement maintenance/cleanup notes/external issues regression RFC / discussion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5883 · Opened Nov 8, 2025
some gcc 15.2.1 warnings Open

maintenance/cleanup

Difficulty 3/5 1-2 days Newbie friendliness 38/100

openwall/john#5879 · 5 comments · Opened Nov 4, 2025
KWallet format optimization potential Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

openwall/john#5878 · Opened Nov 3, 2025
skey test failure from sph_dec32le_aligned UB Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5867 · 6 comments · Opened Oct 14, 2025
Add environment variable to control John’s home directory (XDG Base Directory support) Open

enhancement RFC / discussion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5841 · 2 comments · Opened Sep 2, 2025
o5logon-opencl fails self-tests Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5827 · 4 comments · Opened Aug 20, 2025
rar2john works for rar 4.10 multipart rar Open

enhancement question

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5817 · 7 comments · Opened Aug 17, 2025
Hybrid external mode never calls the original mode's fix_state(), breaking --restore Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5814 · 1 comment · Opened Aug 9, 2025
zip2john fails to get hash from Deflate64 (d64N) compressed pkzip files Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5801 · 3 comments · Opened Jul 11, 2025
Out-of-bounds array access in genmkvpwd Open

bug maintenance/cleanup

Difficulty 3/5 1-2 days Newbie friendliness 48/100

openwall/john#5799 · Opened Jul 3, 2025
genmkvpwd max_lvl parameter memory exhaustion Open

bug maintenance/cleanup

Difficulty 3/5 1-2 days Newbie friendliness 48/100

openwall/john#5798 · Opened Jul 3, 2025
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
"python" may point to nothing (most probable), python2 or python3 (least probable) Open

portability

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5786 · 8 comments · Opened Jun 11, 2025
"undefined hidden symbol" with AMD ROCm Open

portability

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5778 · 45 comments · Opened May 25, 2025
Decide on (not) unifying effectively-same salts of salt-only formats Open

bug enhancement RFC / discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

openwall/john#5734 · 2 comments · Opened Mar 28, 2025
--rules-stack broken (now fixed but may still need some TLC) Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

openwall/john#5722 · 35 comments · Opened Mar 27, 2025
Use VPERMB _mm512_permutexvar_epi8 for DES and/or Lotus Open

enhancement RFC / discussion

Difficulty 5/5 Over a week Newbie friendliness 30/100

openwall/john#5706 · 3 comments · Opened Mar 22, 2025
Effectively-duplicate rule suppression Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

openwall/john#5698 · 1 comment · Opened Mar 16, 2025
Use VAES Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

openwall/john#5690 · 1 comment · Opened Mar 9, 2025
7z password hash can not be matched. Open

bug notes/external issues

Difficulty 4/5 3-5 days Newbie friendliness 25/100

openwall/john#5688 · 24 comments · Opened Mar 5, 2025
Release 2.0.0 Open

enhancement maintenance/cleanup

openwall/john#5686 · 7 comments · 1 assignee · Opened Mar 5, 2025
CI: GitHub is removing Ubuntu 20.04 LTS runners Open

testing

Difficulty 4/5 3-5 days Newbie friendliness 25/100

openwall/john#5683 · 2 comments · Opened Mar 4, 2025
Character encoding inconsistency / reporting Open

bug

openwall/john#5681 · 7 comments · 1 assignee · Opened Mar 4, 2025
Add README-Monero Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

openwall/john#5679 · 1 comment · Opened Mar 1, 2025
Add Support for seed phrases recovery Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

openwall/john#5659 · 1 comment · Opened Feb 7, 2025
Build most programs without OpenMP Open

enhancement RFC / discussion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5658 · 3 comments · Opened Feb 7, 2025
Add support for encrypted LibreOffice 24.2+ documents Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5652 · 6 comments · Opened Jan 22, 2025
Add Bitgo & Block.io Hash mode with opencl Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

openwall/john#5650 · 7 comments · Opened Jan 7, 2025
PDF "permissions" password? vs PDF file open password Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openwall/john#5645 · 5 comments · Opened Dec 31, 2024
When no SIMD is found, configure must deactivate SIMD support Open

bug enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

openwall/john#5631 · 14 comments · Opened Dec 22, 2024
The pfx format has a huge performance loss with clang Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openwall/john#5604 · 1 comment · Opened Dec 2, 2024
Add a benchmark_length flag for "benchmark all different costs" Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

openwall/john#5601 · Opened Dec 2, 2024

openwall/john

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