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The Matasano crypto challenges completed using PHP

The README files scattered throughout contain the original challenge text, in case the original site goes away.

After running composer execute solutions with ./cryptopals.php <challenge_id>

Progress:

  • Set 1: Basics
    • 1. Convert hex to base64
    • 2. Fixed XOR
    • 3. Single-byte XOR cipher
    • 4. Detect single-character XOR
    • 5. Implement repeating-key XOR
    • 6. Break repeating-key XOR
    • 7. AES in ECB mode
    • 8. Detect AES in ECB mode
  • Set 2: Block crypto
    • 9. Implement PKCS#7 padding
    • 10. Implement CBC mode
    • 11. An ECB/CBC detection oracle
    • 12. Byte-at-a-time ECB decryption (Simple)
    • 13. ECB cut-and-paste
    • 14. Byte-at-a-time ECB decryption (Harder)
    • 15. PKCS#7 padding validation
    • 16. CBC bitflipping attacks
  • Set 3: Block & stream crypto
    • 17. The CBC padding oracle
    • 18. Implement CTR, the stream cipher mode
    • 19. Break fixed-nonce CTR mode using substitions
    • 20. Break fixed-nonce CTR statistically
    • 21. Implement the MT19937 Mersenne Twister RNG
    • 22. Crack an MT19937 seed
    • 23. Clone an MT19937 RNG from its output
    • 24. Create the MT19937 stream cipher and break it
  • Set 4: Stream crypto and randomness
    • 25. Break "random access read/write" AES CTR
    • 26. CTR bitflipping
    • 27. Recover the key from CBC with IV=Key
    • 28. Implement a SHA-1 keyed MAC
    • 29. Break a SHA-1 keyed MAC using length extension
    • 30. Break an MD4 keyed MAC using length extension
    • 31. Implement and break HMAC-SHA1 with an artificial timing leak
    • 32. Break HMAC-SHA1 with a slightly less artificial timing leak
  • Set 5: Diffie-Hellman and friends
    • 33. Implement Diffie-Hellman
    • 34. Implement a MITM key-fixing attack on Diffie-Hellman with parameter injection
    • 35. Implement DH with negotiated groups, and break with malicious "g" parameters
    • 36. Implement Secure Remote Password (SRP)
    • 37. Break SRP with a zero key
    • 38. Offline dictionary attack on simplified SRP
    • 39. Implement RSA
    • 40. Implement an E=3 RSA Broadcast attack
  • Set 6: RSA and DSA
    • 41. Implement unpadded message recovery oracle
    • 42. Bleichenbacher's e=3 RSA Attack
    • 43. DSA key recovery from nonce
    • 44. DSA nonce recovery from repeated nonce
    • 45. DSA parameter tampering
    • 46. RSA parity oracle
    • 47. Bleichenbacher's PKCS 1.5 Padding Oracle (Simple Case)
    • 48. Bleichenbacher's PKCS 1.5 Padding Oracle (Complete Case)
  • Set 7: Hashes
    • 49. CBC-MAC Message Forgery
    • 50. Hashing with CBC-MAC
    • 51. Compression Ratio Side-Channel Attacks
    • 52. Iterated Hash Function Multicollisions
    • 53. Kelsey and Schneier's Expandable Messages
    • 54. Kelsey and Kohno's Nostradamus Attack
    • 55. MD4 Collisions
    • 56. RC4 Single-Byte Biases
  • Set 8: Abstract Algebra
    • 57. Diffie-Hellman Revisited: Small Subgroup Confinement
    • 58. Pollard's Method for Catching Kangaroos
    • 59. Elliptic Curve Diffie-Hellman and Invalid-Curve Attacks
    • 60. Single-Coordinate Ladders and Insecure Twists
    • 61. Duplicate-Signature Key Selection in ECDSA (and RSA)
    • 62. Key-Recovery Attacks on ECDSA with Biased Nonces
    • 63. Key-Recovery Attacks on GCM with Repeated Nonces
    • 64. Key-Recovery Attacks on GCM with a Truncated MAC

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