CMAC with IV, IV is always all zeros?

[Leonardo Carreira]

Hi Friends..

I use cryptopp5.60, and..
I have a little doubt regarding CMAC with IV..
I tried to calculate CMAC with IV all zeros, after that i tried to
calculate CMAC with different IV, but the result is always the same
with CMAC result with IV all zeros..

here's my code :
void CMAC_AES(){
        byte key[16];
    byte iv[16];
        byte result[16];
        byte data[16];
        memset(iv, '\xAA', 16);
        memset(result, 0, 16);
        memset(data, 0, 16);
        memset(key, '\x40', 16);

        CMAC<AES> obj;
        obj.SetKeyWithIV(key, 16, iv, 16);
        obj.Update(data, 16);
        obj.Final(result);

        printf("Result = ");
        for(int i=0;i<16; i++)
                printf("%02X", result[i]);
        printf("\n\n");
}

//Result is always = 815AAC547DC3296052FAE07BF71869BC

Please correct me if i'm wrong..

Thanks..

-- 
You received this message because you are subscribed to the "Crypto++ Users" 
Google Group.
To unsubscribe, send an email to cryptopp-users-unsubscr...@googlegroups.com.
More information about Crypto++ and this group is available at 
http://www.cryptopp.com.