41 STATIC enum err derive(struct common_context *cc, struct byte_array *id,  in derive()  argument
45 	TRY(oscore_create_hkdf_info(id, &cc->id_context, cc->aead_alg, type,  in derive()
50 	switch (cc->kdf) {  in derive()
52 		TRY(hkdf_sha_256(&cc->master_secret, &cc->master_salt, &info,  in derive()
67 static enum err derive_common_iv(struct common_context *cc)  in derive_common_iv()  argument
69 	TRY(derive(cc, &EMPTY_ARRAY, IV, &cc->common_iv));  in derive_common_iv()
70 	PRINT_ARRAY("Common IV", cc->common_iv.ptr, cc->common_iv.len);  in derive_common_iv()
80 static enum err derive_sender_key(struct common_context *cc,  in derive_sender_key()  argument
83 	TRY(derive(cc, &sc->sender_id, KEY, &sc->sender_key));  in derive_sender_key()
94 static enum err derive_recipient_key(struct common_context *cc,  in derive_recipient_key()  argument
97 	TRY(derive(cc, &rc->recipient_id, KEY, &rc->recipient_key));  in derive_recipient_key()
112 		c->cc.aead_alg =  in oscore_context_init()
119 		c->cc.kdf = OSCORE_SHA_256; /*that's the default*/  in oscore_context_init()
122         c->cc.fresh_master_secret_salt = params->fresh_master_secret_salt;  in oscore_context_init()
123 	c->cc.master_secret = params->master_secret;  in oscore_context_init()
124 	c->cc.master_salt = params->master_salt;  in oscore_context_init()
125 	c->cc.id_context = params->id_context;  in oscore_context_init()
126 	c->cc.common_iv.len = sizeof(c->cc.common_iv_buf);  in oscore_context_init()
127 	c->cc.common_iv.ptr = c->cc.common_iv_buf;  in oscore_context_init()
128 	TRY(derive_common_iv(&c->cc));  in oscore_context_init()
139 	TRY(derive_recipient_key(&c->cc, &c->rc));  in oscore_context_init()
147 				     .id_context = c->cc.id_context };  in oscore_context_init()
150 	TRY(derive_sender_key(&c->cc, &c->sc));  in oscore_context_init()