Cryptopals Crypto Challenges

These are my attempts to solve the Cryptopals challenges using PHP.

Crypto Challenge Set 1: Basics

• Convert hex to base64
• Fixed XOR
• Single-byte XOR cipher
• Detect single-character XOR
• Implement repeating-key XOR
• Break repeating-key XOR
• AES in ECB mode
• Detect AES in ECB mode

Crypto Challenge Set 2: Block Crypto

• Implement PKCS#7 padding
• Implement CBC mode
• An ECB/CBC detection oracle
• Byte-at-a-time ECB decryption (Simple)
• ECB cut-and-paste
• Byte-at-a-time ECB decryption (Harder)
• PKCS#7 padding validation
• CBC bitflipping attacks