116 mac_setup_by_alg(struct sshmac *mac, const struct macalg *macalg)  in mac_setup_by_alg()  argument
118 	mac->type = macalg->type;  in mac_setup_by_alg()
119 	if (mac->type == SSH_DIGEST) {  in mac_setup_by_alg()
120 		if ((mac->hmac_ctx = ssh_hmac_start(macalg->alg)) == NULL)  in mac_setup_by_alg()
122 		mac->key_len = mac->mac_len = ssh_hmac_bytes(macalg->alg);  in mac_setup_by_alg()
124 		mac->mac_len = macalg->len / 8;  in mac_setup_by_alg()
125 		mac->key_len = macalg->key_len / 8;  in mac_setup_by_alg()
126 		mac->umac_ctx = NULL;  in mac_setup_by_alg()
129 		mac->mac_len = macalg->truncatebits / 8;  in mac_setup_by_alg()
130 	mac->etm = macalg->etm;  in mac_setup_by_alg()
135 mac_setup(struct sshmac *mac, char *name)  in mac_setup()  argument
142 		if (mac != NULL)  in mac_setup()
143 			return mac_setup_by_alg(mac, m);  in mac_setup()
150 mac_init(struct sshmac *mac)  in mac_init()  argument
152 	if (mac->key == NULL)  in mac_init()
154 	switch (mac->type) {  in mac_init()
156 		if (mac->hmac_ctx == NULL ||  in mac_init()
157 		    ssh_hmac_init(mac->hmac_ctx, mac->key, mac->key_len) < 0)  in mac_init()
161 		if ((mac->umac_ctx = umac_new(mac->key)) == NULL)  in mac_init()
165 		if ((mac->umac_ctx = umac128_new(mac->key)) == NULL)  in mac_init()
174 mac_compute(struct sshmac *mac, u_int32_t seqno,  in mac_compute()  argument
185 	if (mac->mac_len > sizeof(u))  in mac_compute()
188 	switch (mac->type) {  in mac_compute()
192 		if (ssh_hmac_init(mac->hmac_ctx, NULL, 0) < 0 ||  in mac_compute()
193 		    ssh_hmac_update(mac->hmac_ctx, b, sizeof(b)) < 0 ||  in mac_compute()
194 		    ssh_hmac_update(mac->hmac_ctx, data, datalen) < 0 ||  in mac_compute()
195 		    ssh_hmac_final(mac->hmac_ctx, u.m, sizeof(u.m)) < 0)  in mac_compute()
200 		umac_update(mac->umac_ctx, data, datalen);  in mac_compute()
201 		umac_final(mac->umac_ctx, u.m, nonce);  in mac_compute()
205 		umac128_update(mac->umac_ctx, data, datalen);  in mac_compute()
206 		umac128_final(mac->umac_ctx, u.m, nonce);  in mac_compute()
212 		if (dlen > mac->mac_len)  in mac_compute()
213 			dlen = mac->mac_len;  in mac_compute()
220 mac_check(struct sshmac *mac, u_int32_t seqno,  in mac_check()  argument
227 	if (mac->mac_len > mlen)  in mac_check()
229 	if ((r = mac_compute(mac, seqno, data, dlen,  in mac_check()
232 	if (timingsafe_bcmp(ourmac, theirmac, mac->mac_len) != 0)  in mac_check()
238 mac_clear(struct sshmac *mac)  in mac_clear()  argument
240 	if (mac->type == SSH_UMAC) {  in mac_clear()
241 		if (mac->umac_ctx != NULL)  in mac_clear()
242 			umac_delete(mac->umac_ctx);  in mac_clear()
243 	} else if (mac->type == SSH_UMAC128) {  in mac_clear()
244 		if (mac->umac_ctx != NULL)  in mac_clear()
245 			umac128_delete(mac->umac_ctx);  in mac_clear()
246 	} else if (mac->hmac_ctx != NULL)  in mac_clear()
247 		ssh_hmac_free(mac->hmac_ctx);  in mac_clear()
248 	mac->hmac_ctx = NULL;  in mac_clear()
249 	mac->umac_ctx = NULL;  in mac_clear()