Feed more message bytes into a MAC computation.
Declared in <openssl/evp.h>
int
EVP_MAC_update(
EVP_MAC_CTX* ctx,
unsigned char const* data,
size_t datalen);1 on success, or 0 on failure.
| Name | Description |
|---|---|
| ctx | MAC context previously initialised with EVP_MAC_init(). |
| data | Message bytes to absorb. |
| datalen | Number of bytes at data. |