#10: Signer her, her og her

POST /level/s3erf5dlm4kxacpnsjo2phombpzgq16t/execute HTTP/1.1
Host: challenge.i18.no
Content-Length: 12
Content-Type: application/x-www-form-urlencoded
Signature: ecb9695d5cd9e363b1661eb23f99dab5e1f4489896fc09895593b2acffdcd125

command=help
Første hint

signature(key, message) = sha256(key || message)

Andre hint

key er 256 byte, message er POST-data.

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