Hey Mark--
Thanks for the response. My understanding is that they are converting
"1234567891234567" as a string, not as a number, so that when they encode the
card number they get:
1234567891234567 --> hex: 31323334353637383931323334353637
When I encrypt "1234567891234567" using cfencrypt and hex encoding, I get the
first half of their result--so the card number string doesn't seem to be the
problem:
My encryption result:
1DF20DDA4A5C45DCD2BCDB191D08559C
Their result:
1DF20DDA4A5C45DCD2BCDB191D08559CC3BF026C725CBB1C366ADEC4867917AA
It's their padding that is the issue--the last byte of which IS a hex number
representing how many total characters of padding were added:
00000000000000000000000000000010 (10hex=16 characters of padding)
I can't figure out how to get this additional padding into the CF encrypt tag,
so that I can get the same results, because I'm passing a regular string in...
theirs appears to be a hex-encoded string for the card number + padding zeroes
+ a hex number representing the total number of characters of padding.
This is the code I'm using:
<cfset encoding = "hex">
<cfset iv=BinaryDecode("00000000000000000000000000000000", "Hex")>
<cfset key = ToBase64(BinaryDecode("SECRETKEYHERE", "Hex"))>
<cfset algorithm = "AES/CBC/NoPadding">
<cfset str =1234567891234567>
<cfset enc = Encrypt(str, key, algorithm, encoding,iv)>
My result--> 1DF20DDA4A5C45DCD2BCDB191D08559C
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