erhant/cryptopals

Cryptopals cryptography challenges in Go.

Cryptopals

This repository has my cryptopals solutions, which are a set of cryptography-related programming challenges. Each challenge is run as a test, stored under sets/setN/chalM_test.go for some set N and challenge M. The rest of the codes are stored under pkg and internal.

To run a specific set:

# N for set number
go test ./sets/setN

# e.g. running set 1 with verbose flag
go test ./sets/set1 -v

To run a specific challenge, similarly:

go test ./sets/setN/chalM_test.go -v

TODO

• Add internal/testing utilities that prints expected / received kind of errors.

Challenges

• Set 1: Basics
  • Challenge 1: Convert hex to base64
  • Challenge 2: Fixed XOR
  • Challenge 3: Single-byte XOR cipher
  • Challenge 4: Detect single-character XOR cipher
  • Challenge 5: Implement repeating-key XOR
  • Challenge 6: Break repeating-key XOR there is a bug here?
  • Challenge 7: AES in ECB mode
  • Challenge 8: Detect AES in ECB mode
• Set 2: Block crypto
  • Challenge 9: Implement PKCS#7 padding
  • Challenge 10: Implement CBC mode
  • Challenge 11: An ECB/CBC detection oracle
  • ...
  • Challenge 15: PKCS#7 padding validation