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utils.py
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utils.py
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from Crypto.Cipher import AES
from Crypto import Random
import base64
import os
import sys
debug = False
def cmpvSafevFarm(initValue, initSafeRa, vFarmValue, vSafeRatio, emissions, lpSwapRatio):
"""
Compare performance of vSafe and vFarm.
initValue : Initial Value
initSafeRa : Initial vSafe Ratio
vSafeRatio : Safe Ratio
vFarmValue : Value in farm
emissions : Emissions
lpSwapRatio : bSwap included as Liquid Provider share.
"""
vSafeEarnings = lpSwapRatio * 2 * (vSafeRatio - initSafeRa) * initValue
vFarmEarnings = lpSwapRatio * 2 * (vFarmValue - initValue) + emissisions
print(f"""
You started with {initValue*2}. \n
And have earned an extra {vSafeEarnings} from the vSafe. \n
And have earned an extra {vFarmEarnings} from the vFarm. \n
This leaves a {vSafeEarnings/vFarmEarnings} difference. \n
And total earnings of {vSafeEarnings + vFarmEarnings}.""")
def obfuscate(txt : str):
"""
Over-shoulder "attack" protection.
Customize in utils.py and here.
"""
obfuscated = base64.b64encode(txt.encode("utf-8"))
if debug : print(f"obfuscate() input: {txt}. Output: {obfuscated}")
return obfuscated
def deObfuscate(txt : str):
deObf = base64.b64decode(txt)
if debug : print(f"deObfuscate() input: {txt}. Output: {deObf}")
return deObf.decode("utf-8")
def verifyKey(txt) -> bool:
obf = obfuscate(txt)
deObf = deObfuscate(obf)
if debug : print(f"verifyKey() input: {txt}. Output: {deObf}")
return txt == deObf
class AESCipher:
def __init__( self, key ):
self.key = key
def encrypt( self, s ):
s = s[:-ord(s[len(s)-1:])] # pad(s)
iv = Random.new().read( AES.block_size )
cipher = AES.new( self.key, AES.MODE_CBC, iv )
return base64.b64encode( iv + cipher.encrypt( s.encode("utf8") ) )
def decrypt( self, enc ):
enc = base64.b64decode(enc)
iv = enc[:16]
cipher = AES.new(self.key, AES.MODE_CBC, iv )
s = (cipher.decrypt( enc[16:] ))
return s # unpad(s)
random_key = os.urandom(16)
enc = AESCipher(random_key)
encrypted = enc.encrypt("0xabcMyKey")
if __name__ == "__main__":
key = sys.argv[1]
assert verifyKey(key), "ERROR: Could not verify base64-pair"
print(obfuscate(key))