Hello,
What would be the equivalent of the SHA256() function in the EVP
class of methods ? EVP_sha256() could be it, although from the
short description in manual page it does not seemingly fit in,
returning a EVP_MD which is, if not mistaken, a env_md_st
structure.
The code I'm adapting to EVP has a first pass of shortening the
key if too long:
/* Change key if longer than 64 bytes */
if (klen > HMAC_INT_LEN) {
SHA256(key, klen, nkey);
key = nkey;
klen = SHA256_DIGEST_LENGTH;
}
Before proceeding with the usual SHA256_Init(),
SHA256_Update() (twice), and SHA256_Final. All of which I have
tested with the corresponding EVP_* methods. For the use of
SHA256() above, though, I'm puzzled regarding its EVP_*
counterpart.
Suggestions, comments appreciated.
Regards.
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