k5_sha256
k5_sha256(const krb5_data *in, size_t n, uint8_t out[K5_SHA256_HASHLEN]);
ret = k5_sha256(&ticket->enc_part.ciphertext, 1, hashbytes);
if (k5_sha256(&iov.data, 1, (uint8_t *)hval.data) != 0)
return k5_sha256(dlist, ndata, result_out);