Playing around with the merkle damgard construction.

• Block size: 32 bytes
• The padding length (p) is p = 32-len(M)%32 where M is the message to be hashed in bytes.
• The padding starts with a 1. All other bytes are zeros.
• Additionally after the padding (P) has been applied to the message M, the length of M as int64 is appended to M||P.
• The compression function f is xor.
• The IV is 3.141592653589793238462643383279 (32 bytes).

1. go build
2. ./md-experiment file.txt