Hi,
I am using openssl for encryption in my project and currently i am stuck
with few issues...
1. As i understand AES_wrap_key(), first argument AES_KEY *key is the key
which needs to be wrapped and *in is the wrapping key. Correct me if i am
wrong.
int AES_wrap_key(AES_KEY *key, const unsigned char *iv,
unsigned char *out,
const unsigned char *in, unsigned int inlen)
2. By looking at the code, i see AES_wrap_key() supports max of 480 bits [
unsigned long rd_key[4 *(AES_MAXNR + 1)];] and my project demands to support
512 bits of key. How do i do this?
struct aes_key_st {
#ifdef AES_LONG
unsigned long rd_key[4 *(AES_MAXNR + 1)];
#else
unsigned int rd_key[4 *(AES_MAXNR + 1)];
#endif
int rounds;
};
typedef struct aes_key_st AES_KEY;
eg: Below is the key which i want to encrypt and use HMAC for wrapping it...
DEK = fb28cb4ec469b09a4ab170f4c846fe875b1cf5f264658145937b5cb9fe63be
HMAC: 501bc4b446a12c0259d4484dfc42467843cfab02fb7cf8081b13f71b56e7596c
3. I am also stuck on how to convert this DEK string into integer which can
store 512 bits...
Any help is highly appreciated.
Thanks
Prashanth
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