cardgen.awk (1045B)
1 # Valid banking card number generator script 2 # 3 # Usage: awk -f cardgen.awk [BIN] 4 # you can pass any amount of digits, if less than 16 then the rest 5 # is randomized and the checksum is calculated accordingly 6 # if more, then it's truncated to 15 and the checksum is calculated 7 # if no BIN is passed, a fully random valid card number is generated 8 # 9 # Created by Luxferre in 2024, released into public domain 10 11 # Luhn checksum (picoLuhn variation for 15 digits) 12 function luhn(ccstr, acc, i, l, d) { 13 acc = 0 14 l = length(ccstr) # must be odd in this variation 15 for(i=0;i<l;i++) { 16 d = int(substr(ccstr, i+1, 1)) # get current digit 17 acc = (acc + int(d * ((i%2) == 0 ? 2.2 : 1))) % 10 # accumulate 18 } 19 return (10 - acc) % 10 # finalize the check digit 20 } 21 22 BEGIN { 23 srand() # init PRNG 24 cc = ARGV[1] 25 gsub(/[^0-9]/, "", cc) # remove all non-digits 26 for(i=0;i<15;i++) # append 15 random digits 27 cc = cc int(rand()*10) 28 cc = substr(cc, 1, 15) # truncate to first 15 digits 29 print(cc luhn(cc)) # output complete number with checksum 30 }