sec-pentesting-toolkit/Cryptography

Cryptography

MD5

Scripts

• Hash length extension attack
• Brute force hex digest chars

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SHA

Scripts

• SHA-256 brute force

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Rotation Ciphers

Scripts

• Caesar
• Brute force rotation
• Pygenere
• Frequency analysis

Online tools:

• Frequency analysis: here and here

In the command line

$ VAR=$(cat data.txt)
$ echo "$VAR"
$ alias rot13="tr A-Za-z N-ZA-Mn-za-m"
$ echo "$VAR" | rot13

In Python

In Python we can use decoding:

"YRIRY GJB CNFFJBEQ EBGGRA".decode(encoding="ROT13")

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Pailier Cryptosystem

Scripts

• POC
• Primes

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Tools

Scripts:

• Finding GDC
• Finding if prime
• Generate prime
• Quick Select
• XORtool

Online

• Cryptol

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