GenerateKey.py

import hashlib

'''
\Function{GenerateKey}{$B$}
    \State Initialize an empty string $key$
    \For{$i = 1$ to $5$}
        \State Initialize an empty string $subkey_i$
        \For{$j = 1$ to $7$}
            \If{$i = 1$} 
                \State $str_j \gets \Call{sha512}{B[j]}$ \Comment{$B[j]$ is solution to $jth$ block in chain}
            \Else
                \State $str_j \gets \Call{sha512}{subkey_{i-1} \Vert B[j]}$ \Comment{$\Vert$ denotes concatenation}
            \EndIf
            \State $subkey_i \gets subkey_i \Vert str_j$
        \EndFor
        \State $key \gets key \Vert subkey_i$
    \EndFor
    \State \textbf{return} $key$
\EndFunction
'''

def doSha(inputStr):
    return hashlib.sha512(inputStr.encode()).hexdigest()

def doSha3(inputStr):
    return hashlib.sha3_512(inputStr.encode()).hexdigest()

def generateKey(B):
    key = ""
    subkey = ["","","","","",""]
    for i in range(0, 5):
        for j in range(0, 7):
            if i == 0:
                str_j = doSha(B[j])
            else:
                str_j = doSha(subkey[i-1] + B[j])
            subkey[i]+=str_j
        key += subkey[i]
    return key

BlockchainSolutions = [
    "poso",
    "laerania",
    "a35s6hv",
    "varyyourtwo",
    "fmk",
    "dlul’f’r’",
    "igna"
]
 
key = generateKey(BlockchainSolutions)
print(key)

# alphabet = "abcdefghijklmnopqrstuvwxyz0123456789()_+-={}|,>?!$[]:/\\"
# cipher: Vigenere, Strict case (e.g. A not equal to a), Include foreign characters (include in output, but they do not influence key index)"