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kats.py
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kats.py
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from bitstring import BitArray
from sdes import SDES
def VarPlainEKAT():
key = '0000000000'
sdes = SDES(key, 'b')
p = BitArray(bin='10000000')
table = []
for _ in range(8):
table.append([p.bin, sdes.encrypt(str(p.bin), 'b').bin])
p.ror(1)
return table
def VarCipherDKAT():
key = '0000000000'
sdes = SDES(key, 'b')
p = BitArray(bin='10000000')
table = []
for _ in range(8):
encrypted_p = sdes.encrypt(str(p.bin), 'b').bin
table.append([p.bin, sdes.decrypt(encrypted_p, 'b').bin])
p.ror(1)
return table
def InvPermEKAT(tableIn):
key = '0000000000'
sdes = SDES(key, 'b')
tableOut = []
for i in range(8):
tableOut.append([sdes.encrypt(tableIn[i][1], 'b').bin, tableIn[i][1]])
return tableOut
def InvPermDKAT(tableIn):
key = '0000000000'
sdes = SDES(key, 'b')
tableOut = []
for i in range(8):
tableOut.append([tableIn[i][1], sdes.decrypt(tableIn[i][1], 'b').bin])
return tableOut
def VarKeyEKAT():
key = BitArray(bin='1000000000')
sdes = SDES(str(key.bin), 'b')
p = '00000000'
table = []
for _ in range(10):
table.append([str(key.bin), sdes.encrypt(p, 'b').bin])
key.ror(1)
sdes = SDES(str(key.bin), 'b')
return table
def VarKeyDKAT():
key = BitArray(bin='1000000000')
sdes = SDES(str(key.bin), 'b')
p = '00000000'
table = []
for _ in range(10):
c = sdes.encrypt(p, 'b').bin
table.append([str(key.bin), sdes.decrypt(c, 'b').bin])
key.ror(1)
sdes = SDES(str(key.bin), 'b')
return table
def PermOpEKAT():
keys = ['0000000011', '0011001010', '0001011001', '1011001111']
p = '00000000'
table = []
for i in range(4):
sdes = SDES(keys[i], 'b')
table.append([keys[i], sdes.encrypt(p, 'b').bin])
return table
def PermOpDKAT():
keys = ['0000000011', '0011001010', '0001011001', '1011001111']
p = '00000000'
table = []
for i in range(4):
sdes = SDES(keys[i], 'b')
c = sdes.encrypt(p, 'b').bin
table.append([keys[i], sdes.decrypt(c, 'b').bin])
return table
def SubTableEKAT():
keys = ['0001101101', '0001101110', '0001110000',
'0001110001', '0001110110', '0001111000', '0001111001']
p = '00000000'
table = []
for i in range(7):
sdes = SDES(keys[i], 'b')
table.append([keys[i], sdes.encrypt(p, 'b').bin])
return table
def SubTableDKAT():
keys = ['0001101101', '0001101110', '0001110000',
'0001110001', '0001110110', '0001111000', '0001111001']
p = '00000000'
table = []
for i in range(7):
sdes = SDES(keys[i], 'b')
c = sdes.encrypt(p, 'b').bin
table.append([keys[i], sdes.decrypt(c, 'b').bin])
return table
def DidKATPass(desired, function, op_input=None):
if (op_input and desired == function(op_input)) or (not op_input and desired == function()):
print('+ PASSED:\t', function.__name__)
else:
print('- FAILED:\t', function.__name__)
desired_VarPlainEKAT = [
['10000000', '10101000'],
['01000000', '10111110'],
['00100000', '00010110'],
['00010000', '01001010'],
['00001000', '01001001'],
['00000100', '01001110'],
['00000010', '00010101'],
['00000001', '01101000']]
desired_VarKeyEKAT = [
['1000000000', '01100001'],
['0100000000', '00010011'],
['0010000000', '01001111'],
['0001000000', '11100101'],
['0000100000', '01100101'],
['0000010000', '01011100'],
['0000001000', '10101110'],
['0000000100', '11011001'],
['0000000010', '10101010'],
['0000000001', '01001110']]
desired_PermOpEKAT = [
['0000000011', '00000011'],
['0011001010', '00100010'],
['0001011001', '01000000'],
['1011001111', '01100000']]
desired_SubTableEKAT = [
['0001101101', '10000111'],
['0001101110', '10110110'],
['0001110000', '10110100'],
['0001110001', '00110011'],
['0001110110', '11011001'],
['0001111000', '10001101'],
['0001111001', '00010001']]
desired_VarCipherDKAT = [
['10000000', '10000000'],
['01000000', '01000000'],
['00100000', '00100000'],
['00010000', '00010000'],
['00001000', '00001000'],
['00000100', '00000100'],
['00000010', '00000010'],
['00000001', '00000001']]
desired_InvPermDKAT = [
['10000000', '10101000'],
['01000000', '10111110'],
['00100000', '00010110'],
['00010000', '01001010'],
['00001000', '01001001'],
['00000100', '01001110'],
['00000010', '00010101'],
['00000001', '01101000']]
desired_VarKeyDKAT = [
['1000000000', '00000000'],
['0100000000', '00000000'],
['0010000000', '00000000'],
['0001000000', '00000000'],
['0000100000', '00000000'],
['0000010000', '00000000'],
['0000001000', '00000000'],
['0000000100', '00000000'],
['0000000010', '00000000'],
['0000000001', '00000000']]
desired_PermOpDKAT = [
['0000000011', '00000000'],
['0011001010', '00000000'],
['0001011001', '00000000'],
['1011001111', '00000000']]
desired_SubTableDKAT = [
['0001101101', '00000000'],
['0001101110', '00000000'],
['0001110000', '00000000'],
['0001110001', '00000000'],
['0001110110', '00000000'],
['0001111000', '00000000'],
['0001111001', '00000000']]
print('DS-DES Known Answer Tests (KATs)')
print('--------------------------------\n')
print('Encryption KATs:')
DidKATPass(desired_VarPlainEKAT, VarPlainEKAT)
DidKATPass(desired_VarPlainEKAT, InvPermEKAT, VarPlainEKAT())
DidKATPass(desired_VarKeyEKAT, VarKeyEKAT)
DidKATPass(desired_PermOpEKAT, PermOpEKAT)
DidKATPass(desired_SubTableEKAT, SubTableEKAT)
print('\nDecryption KATs:')
DidKATPass(desired_VarCipherDKAT, VarCipherDKAT)
DidKATPass(desired_InvPermDKAT, InvPermDKAT, VarCipherDKAT())
DidKATPass(desired_VarKeyDKAT, VarKeyDKAT)
DidKATPass(desired_PermOpDKAT, PermOpDKAT)
DidKATPass(desired_SubTableDKAT, SubTableDKAT)