Thanks for the reminder. This has been fixed in r516.
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From: "Berserker" <[email protected]>
Sent: Wednesday, February 03, 2010 2:33 AM
To: "Crypto++ Users" <[email protected]>
Subject: CRT and null IV
Hi, I have recently switched to Crypto++ 5.6.0 (from 5.5.2) and I
found a problem using AES/CTR.
I choose the CRT mode because it supports a null IV, as reported by
Wei Dai here
http://www.mail-archive.com/[email protected]/msg00557.html
"In CTR mode, the IV is being used as the initial counter value. If
you want to use a initial counter value of 0, pass in a NULL pointer
for the IV. And yes, IV size is still the size of the cipher block."
This is the code I'm actually using:
typename CTR_Mode<AES>::Encryption encryptor(key_buff, key_len, NULL);
Using Crypto++ 5.5.2 it works fine, but with version 5.6.0 it throws
the exception: "AES/CTR: this object cannot use a null IV"
I tried the overloaded constructor that takes 2 params too, but it
throws the same exception...
Is this a bug in 5.6.0?
Plz help
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