36     if (s->hmac)  in ff_srtp_free()
37         av_hmac_free(s->hmac);  in ff_srtp_free()
38     s->hmac = NULL;  in ff_srtp_free()
93     s->hmac = av_hmac_alloc(AV_HMAC_SHA1);  in ff_srtp_set_crypto()
94     if (!s->aes || !s->hmac)  in ff_srtp_set_crypto()
128     uint8_t iv[16] = { 0 }, hmac[20];  in ff_srtp_decrypt()  local
147     av_hmac_init(s->hmac, rtcp ? s->rtcp_auth : s->rtp_auth, sizeof(s->rtp_auth));  in ff_srtp_decrypt()
149     av_hmac_update(s->hmac, buf, len - hmac_size);  in ff_srtp_decrypt()
175         av_hmac_update(s->hmac, rocbuf, 4);  in ff_srtp_decrypt()
178     av_hmac_final(s->hmac, hmac, sizeof(hmac));  in ff_srtp_decrypt()
179     if (memcmp(hmac, buf + len - hmac_size, hmac_size)) {  in ff_srtp_decrypt()
241     uint8_t iv[16] = { 0 }, hmac[20];  in ff_srtp_encrypt()  local
313     av_hmac_init(s->hmac, rtcp ? s->rtcp_auth : s->rtp_auth, sizeof(s->rtp_auth));  in ff_srtp_encrypt()
314     av_hmac_update(s->hmac, out, buf + len - out);  in ff_srtp_encrypt()
318         av_hmac_update(s->hmac, rocbuf, 4);  in ff_srtp_encrypt()
320     av_hmac_final(s->hmac, hmac, sizeof(hmac));  in ff_srtp_encrypt()
322     memcpy(buf + len, hmac, hmac_size);  in ff_srtp_encrypt()