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#1 (permalink)

02-06-2009

mk4mzid

Registered User

Join Date: Feb 2009

Posts: 3

Replace variable length numeric string

I have a customer who logged some cc and bank account numbers in their apache logs. I got the cc numbers x'd out with

Code:

sed -e 's/args=[0-9]\{16\}/args=XXXXXXXXXXXXXXXX/g' -e 's/cardnum=[0-9]\{16\}/cardnum=XXXXXXXXXXXXXXXX/g'

but that wasn't too difficult due to the value being 16 digits.

The bank account info is different, might be 6 digits, might be 10, might be 15. The actual string in the log entry will contain

Code:

args=123456789&acctnum=123456789

somewhere in the middle of the line.

Now that I think about it, the new value doesn't have to match the original, meaning if it's a 7 digit value, I don't have to have 7 x's, I can replace the value, whatever the length, with say 7 or 10 x's. I'm just not sure how to identify the original variable length string.

Any thoughts?

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