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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| sw:password_cracking [2026/05/14 08:49] – niziak | sw:password_cracking [2026/05/14 11:41] (current) – niziak | ||
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| ====== password cracking ====== | ====== password cracking ====== | ||
| + | |||
| + | ===== hashcat ===== | ||
| + | |||
| + | Benchmarks: | ||
| + | <code bash> | ||
| + | hashcat -b -m 10500 -D 1 | ||
| + | * Device #2: cpu-haswell-AMD Ryzen 5 5500, 14928/29921 MB (4096 MB allocatable), | ||
| + | Speed.# | ||
| + | </ | ||
| + | |||
| + | <code bash> | ||
| + | * Device #1: cpu-skylake-avx512-AMD Ryzen 9 9950X 16-Core Processor, 29888/59841 MB (8192 MB allocatable), | ||
| + | Speed.# | ||
| + | </ | ||
| + | |||
| + | <code bash> | ||
| + | hashcat -b -m 10500 -D 2 | ||
| + | * Device #1: NVIDIA GeForce GTX 1660 SUPER, 4352/5927 MB (1481 MB allocatable), | ||
| + | Speed.# | ||
| + | </ | ||
| + | |||
| + | |||
| + | [[https:// | ||
| ===== PDF ===== | ===== PDF ===== | ||
| + | |||
| <code bash> | <code bash> | ||
| file document.pdf | file document.pdf | ||
| Line 11: | Line 35: | ||
| <code bash> | <code bash> | ||
| / | / | ||
| - | $pdf$4*4*128*-12*1*16*... | + | $pdf$4*4*128*-12*1*16*<32 hex chars = 16bytes> |
| / | / | ||
| </ | </ | ||
| + | |||
| + | <code bash> | ||
| + | $ john --verbosity=6 hash_john.txt | ||
| + | initUnicode(UNICODE, | ||
| + | UTF-8 -> UTF-8 -> UTF-8 | ||
| + | Using default input encoding: UTF-8 | ||
| + | Loaded 1 password hash (PDF, PDF encrypted document [MD5-RC4 / SHA2-AES 32/64]) | ||
| + | Cost 1 (revision) is 4 for all loaded hashes | ||
| + | Cost 2 (key length) is 128 for all loaded hashes | ||
| + | </ | ||
| + | |||
| + | '' | ||
| + | * $pdf$4: Indicates the PDF format. | ||
| + | * 4: Revision number (R). Revision 4 indicates 128-bit AES/ARC4 encryption | ||
| + | * 4: Version of the encryption algorithm (V) | ||
| + | * 128: Length of the key in bits (128-bit). | ||
| + | * -12 (or another number): Length of the encryption data, often indicating permission settings, sometimes shown as a specific number of rounds in hashing algorithms. | ||
| + | * 1: Type of encryption (e.g., 1 for Standard). | ||
| + | * 16: Length of the user password hash/salt. | ||
| + | * <Hex Salt>: This is the User Password/ | ||
| Install '' | Install '' | ||