On Mon October 31 2011, Dave Thompson wrote:
> > From: owner-openssl-us...@openssl.org On Behalf Of Michael S. Zick
> > Sent: Sunday, 30 October, 2011 06:36
>
> > On Sun October 30 2011, Ananthasayanan Kandiah wrote:
> > > #include <stdio.h>
> > > #include <string.h>
> > > #include <openssl/aes.h>
> > > #include <openssl/bio.h>
> > >
> > > #define KEY_SIZE 16
>
> > Ask the compiler to help you:
> >
> > mszick@wolf466:~/crypto$ gcc -Wall -E aes_test.c | grep "_SIZE"
> >
> > aes_test.c:6:9: error: macro names must be identifiers
> > unsigned char key_data[KEY_SIZE] = {
> > AES_set_encrypt_key(key_data, KEY_SIZE * 8, &key);
> >
> I don't know what happened to the message you got,
>
My copy sent by the mailing list and processed by who-knows-what
before I got it had unicode buried in the whitespaces.
> but I got "#define KEY_SIZE 16" which is a valid identifier,
>
That is the way my eyes read it also, but gcc -E wasn't showing
it as being expanded. (????)
Since I couldn't tell if what I got was what the OP was trying
to compile, I suggested the OP check its expansion themself.
>
> compiled without error, and gave the symptom reported --
> because CRYPTO_cfb128_1_encrypt treats the length as bits
>
My copy from the mailing list used: AES_cfb1_encrypt(...)
(Like the title of the post.)
Can't see how yours got like the above, unless you retyped
the post and your fingers just automatically corrected the
function call being used.
> not bytes (apparently only used for AES and Camellia).
> 97 bits is 12 bytes plus 1 bit, and that 'extra' bit
> is 0 and thus 'disappears'.
>
Yeah, I was thinking of suggesting "man ..." also.
Maybe I should have to have been complete.
Mike
> Note these CFB-1 and CFB-8 modes don't update 'num',
> so OP's line 68 is unnecessary (but harmless).
> CFB-block (16bytes=128bits) does.
>
>
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