Giters

mysto / java-fpe

FPE - Format Preserving Encryption with FF3 in Java

Home Page:https://privacylogistics.com

Geek Repo:Geek Repo

Github PK Tool:Github PK Tool

String with '-' or space doesn't work

johnwyz88 opened this issue · comments

commented

For example, all of these fails to be encrypted.

@Param({
    "driver licences 123456-789",
    "ssn 841-01-2233",
    "cc 5360888786433111",
    "cell +1(416)-562-0165",
    "email donald.duck@google.com",
    "large json event",
})

java.lang.NumberFormatException: For input string: "c 5360"
at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.base/java.lang.Integer.parseInt(Integer.java:652)
at java.base/java.math.BigInteger.(BigInteger.java:543)
at com.amazon.awsstewardengine.FF3Cipher.encrypt(FF3Cipher.java:95)

java.lang.NumberFormatException: Illegal embedded sign character
at java.base/java.math.BigInteger.(BigInteger.java:492)
at com.amazon.awsstewardengine.FF3Cipher.encrypt(FF3Cipher.java:95)

commented

Yes, it is correct that only numeric and mono-case US ASCII letters are supported (a-z) by default. The NIST FPE Feistel cipher has a 'radix' representing the range of characters. Special characters, or international characters are supported if you define an alphabet. However, the positional formatting would not be preserved. For example, a SSN using an alphabet with dashes could have a single dash, or five.

I would suggest you remove the formatting (dashes, spaces) before encryption, and re-apply formatting afterwards.