onlyforbopi
2/23/2018 - 12:24 PM
PYTHON CHECKSUMS
- Luhn Algorithm (Convert CA to RF)
- Mod10 Checksum (Convert POD to KHP)
def mod10(number):
'''
Function: mod10(input)
Category: Checksums
Name: mod10
Input: numerical integer / string
Output: check digit, target number, logical check, full product
Description: Implements a mod 10 check digit algorithm to a string
Usage: print(mod10(string))
Notes: Iterates digits in reverse
'''
# Initialize an array to hold the digits
digits = []
# For even check
even = False
# Counter - For even check on indexes.
i = 0
# Iterate over digits in reverse order
for digit in reversed(number):
# parse digit
digit = ord(digit) - ord('0')
#print("Checkign digit: " + str(digit))
if (i == 0) or ( i%2==0):
#print( str(digit) + 'is even')
digit = digit * 2
#print ("newdigit: " + str(digit))
if digit >= 10:
digit = digit % 10 + digit // 10
digits.append(digit)
#print(digits)
even = not even
wanted_number = sum(digits)
i += 1
# Initialize check to find number
check = 0
# Iterate until you find it.
while check < 10:
if ((wanted_number + check) % 10) == 0:
break
else:
check += 1
return (digit, wanted_number, check, ( (sum(digits) + check) % 10 == 0), str(number) + str(check))
########
def KHPtoPOD(string1):
'''
Function: Convert KHP (Kodikos E. Pliromis) to POD (Paroxi)
Name: KHPtoPOD
Input: string1
Output: string
Usage: KHPtoPOD(string1)
Notes: Converts KHP to POD by changing the check digit in the end.
'''
# Initialize counters, outputs, and parse arguments
outstring = ''
status = 0
string1 = str(string1)
# splice substrings
area_code = string1[:1]
eight_dig = string1[1:9]
diadoxos = string1[9:11]
checkdigitold = string1[11]
# Calculate modulos
fixed_int = int(eight_dig)
mod_in = fixed_int % 11
if mod_in == 10:
mod_in = 1
outstring = str(area_code) + str(eight_dig) + str(diadoxos) + str(mod_in)
return outstring
##########
def contoRF(inte, kod, psi):
'''
Function: Converts Contract Account to RF
Name: contoRF
Input: Contract Account, 5 digit code, single digit check digit
Output: Full RF Code without Sum Total.
Usage: contoRF(inte, kod, psi)
Notes: Converts Contract Account to RF using mod97
'''
base=str(inte)
if len(base) == 12:
baseaug = str(kod) + str(psi) + "000" + base + "271500"
else:
baseaug = str(kod) + str(psi) + "00000" + base + "271500"
baseaugn=int(baseaug)
cd=baseaugn%97
cdfixed= 98 - cd
if cdfixed < 10:
cdfixed = "0" + str(cdfixed)
else:
cdfixed = str(cdfixed)
if len(base) == 12:
output = "RF" + str(cdfixed) + str(kod) + str(psi) + "000" + str(inte)
else:
output = "RF" + str(cdfixed) + str(kod) + str(psi) + "00000" + str(inte)
# Validating its the correct calc
#print ("Validating")
temp2 = str(output[4:])
#print (temp2)
temp3 = temp2 + "2715" + str(cdfixed)
#print (temp3)
if int(temp3)%97 == 1:
status = "ok"
else:
status = "notok"
return (output, status)def KHPtoPOD(string1):
outstring = ''
status = 0
string1 = str(string1)
area_code = string1[:1]
eight_dig = string1[1:9]
diadoxos = string1[9:11]
checkdigitold = string1[11]
fixed_int = int(eight_dig)
mod_in = fixed_int % 11
if mod_in == 10:
mod_in = 1
outstring = str(area_code) + str(eight_dig) + str(diadoxos) + str(mod_in)
return outstring
def contoRF(inte, kod, psi):
#print(inte)
#print(type(inte))
base=str(inte)
#print (base)
#print (type(base))
if len(base) == 12:
baseaug = str(kod) + str(psi) + "000" + base + "271500"
else:
baseaug = str(kod) + str(psi) + "00000" + base + "271500"
#print (baseaug)
#print (type(baseaug))
baseaugn=int(baseaug)
#print (baseaugn)
#print (type(baseaugn))
cd=baseaugn%97
#print (cd)
#print (type(cd))
cdfixed= 98 - cd
#print (cdfixed)
if cdfixed < 10:
cdfixed = "0" + str(cdfixed)
else:
cdfixed = str(cdfixed)
if len(base) == 12:
output = "RF" + str(cdfixed) + str(kod) + str(psi) + "000" + str(inte)
else:
output = "RF" + str(cdfixed) + str(kod) + str(psi) + "00000" + str(inte)
# Validating its the correct calc
#print ("Validating")
temp2 = str(output[4:])
#print (temp2)
temp3 = temp2 + "2715" + str(cdfixed)
#print (temp3)
if int(temp3)%97 == 1:
status = "ok"
else:
status = "notok"
return (output, status)
def KHPtoPOD(string1):
outstring = ''
status = 0
string1 = str(string1)
area_code = string1[:1]
eight_dig = string1[1:9]
diadoxos = string1[9:11]
checkdigitold = string1[11]
fixed_int = int(eight_dig)
mod_in = fixed_int % 11
if mod_in == 10:
mod_in = 1
outstring = str(area_code) + str(fixed_int) + str(diadoxos) + str(mod_in)
return outstring
print(KHPtoPOD(282010001011))def convertPODtoKHP(string):
# Cast into string
string = str(string)
# split first 11 elements
proc_string = string[:11]
check = proc_string[:7]
check2 = proc_string[:1]
#print (check)
#print (check2)
out_string = ''
status = 0
# Cast back into integer
if check == "VERMION":
out_string = proc_string
#print ("PROBLEM: VERMION IN POD")
status = 1
elif check2 == "&":
out_string = proc_string
#print ("PROBLEM: & IN POD")
status = 2
else:
fixed_int = int(proc_string)
mod_in = fixed_int % 11
if mod_in == 10:
mod_in = 1
out_string = str(proc_string) + str(mod_in)
return (out_string, status)def contoRF(inte, kod, psi):
'''
Function: contoRF
Description: Transforms CA to RF
Usage: contoRF(string, "90775", 8)
Example:
Notes:
'''
#print(inte)
#print(type(inte))
base=str(inte)
#print (base)
#print (type(base))
if len(base) == 12:
baseaug = str(kod) + str(psi) + "000" + base + "271500"
else:
baseaug = str(kod) + str(psi) + "00000" + base + "271500"
#print (baseaug)
#print (type(baseaug))
baseaugn=int(baseaug)
#print (baseaugn)
#print (type(baseaugn))
cd=baseaugn%97
#print (cd)
#print (type(cd))
cdfixed= 98 - cd
#print (cdfixed)
if cdfixed < 10:
cdfixed = "0" + str(cdfixed)
else:
cdfixed = str(cdfixed)
if len(base) == 12:
output = "RF" + str(cdfixed) + str(kod) + str(psi) + "000" + str(inte)
else:
output = "RF" + str(cdfixed) + str(kod) + str(psi) + "00000" + str(inte)
# Validating its the correct calc
#print ("Validating")
temp2 = str(output[4:])
#print (temp2)
temp3 = temp2 + "2715" + str(cdfixed)
#print (temp3)
if int(temp3)%97 == 1:
status = "ok"
else:
status = "notok"
return (output, status)