hi!
if i use:
{
EVP_EncryptInit(&ctx, EVP_aes_128_cbc(), key, NULL);
}
is work
if i use:
{
const EVP_CIPHER *c;
c = EVP_aes_128_cbc();
EVP_EncryptInit(&ctx, c, key, NULL);
}
is work
but, if i use:
{
const EVP_CIPHER *c;
c = EVP_get_cipherbyname("aes-128-cbc");
EVP_EncryptInit(&ctx, EVP_aes_128_cbc(), key, NULL);
}
doesn't work
(segmentation fault)
mark
On 3/29/06, Dr. Stephen Henson <[EMAIL PROTECTED]> wrote:
> On Wed, Mar 29, 2006, Nagy Zoltn Mrk wrote:
>
> > Dear all
> >
> > I would like to create a data structure in C.
> > Below you can see what I have created, but it doesn't work correctly.
> > My question is: why doesn't initialised EVP_aes_128_cbc() into cipher?
> >
> > #define ORANGE 0xffa500
> >
> > struct ciphers_name
> > {
> > unsigned char *name;
> > unsigned char *description;
> > const EVP_CIPHER *cipher;
> > unsigned int color;
> > };
> >
> >
> > struct ciphers_name ciphers[] =
> > {
> > { "aes128cbc","AES 128bit CBC",EVP_aes_128_cbc(),ORANGE}
> > };
> >
>
> That wont work in many cases because you are trying to initialize the
> structure with the return value from a function.
>
> The initialization is done at compile time but that return value is only
> available at runtime.
>
> You have a couple of options. One is to change that definition to a function
> pointer which you set to EVP_aes_128_cbc note *NOT* EVP_aes_128_cbc(). Then at
> runtime you call that function pointer to get the EVP_CIPHER.
>
> The alternative is to include something which you can lookup to get that
> cipher. An example would be NID_aes_128_cbc which you can then lookup using
> EVP_getcipherbynid().
>
> Steve.
> --
> Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
> OpenSSL project core developer and freelance consultant.
> Funding needed! Details on homepage.
> Homepage: http://www.drh-consultancy.demon.co.uk
> ______________________________________________________________________
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