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Commit 25528fda authored by Herbert Xu's avatar Herbert Xu
Browse files

mac802154: Switch to new AEAD interface 



This patch makes use of the new AEAD interface which uses a single
SG list instead of separate lists for the AD and plain text.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 000ae7b2

net/mac802154/llsec.c

+14 −27
Original line number Diff line number Diff line
@@ -650,7 +650,7 @@ llsec_do_encrypt_auth(struct sk_buff *skb, const struct mac802154_llsec *sec, 
	u8 iv[16];

	unsigned char *data;

	int authlen, assoclen, datalen, rc;

	struct scatterlist src, assoc[2], dst[2];

	struct scatterlist sg;

	struct aead_request *req;



	authlen = ieee802154_sechdr_authtag_len(&hdr->sec);
@@ -660,30 +660,23 @@ llsec_do_encrypt_auth(struct sk_buff *skb, const struct mac802154_llsec *sec, 
	if (!req)

		return -ENOMEM;



	sg_init_table(assoc, 2);

	sg_set_buf(&assoc[0], skb_mac_header(skb), skb->mac_len);

	assoclen = skb->mac_len;



	data = skb_mac_header(skb) + skb->mac_len;

	datalen = skb_tail_pointer(skb) - data;



	if (hdr->sec.level & IEEE802154_SCF_SECLEVEL_ENC) {

		sg_set_buf(&assoc[1], data, 0);

	} else {

		sg_set_buf(&assoc[1], data, datalen);

	skb_put(skb, authlen);



	sg_init_one(&sg, skb_mac_header(skb), assoclen + datalen + authlen);



	if (!(hdr->sec.level & IEEE802154_SCF_SECLEVEL_ENC)) {

		assoclen += datalen;

		datalen = 0;

	}



	sg_init_one(&src, data, datalen);



	sg_init_table(dst, 2);

	sg_set_buf(&dst[0], data, datalen);

	sg_set_buf(&dst[1], skb_put(skb, authlen), authlen);



	aead_request_set_callback(req, 0, NULL, NULL);

	aead_request_set_assoc(req, assoc, assoclen);

	aead_request_set_crypt(req, &src, dst, datalen, iv);

	aead_request_set_crypt(req, &sg, &sg, datalen, iv);

	aead_request_set_ad(req, assoclen);



	rc = crypto_aead_encrypt(req);
@@ -859,7 +852,7 @@ llsec_do_decrypt_auth(struct sk_buff *skb, const struct mac802154_llsec *sec, 
	u8 iv[16];

	unsigned char *data;

	int authlen, datalen, assoclen, rc;

	struct scatterlist src, assoc[2];

	struct scatterlist sg;

	struct aead_request *req;



	authlen = ieee802154_sechdr_authtag_len(&hdr->sec);
@@ -869,27 +862,21 @@ llsec_do_decrypt_auth(struct sk_buff *skb, const struct mac802154_llsec *sec, 
	if (!req)

		return -ENOMEM;



	sg_init_table(assoc, 2);

	sg_set_buf(&assoc[0], skb_mac_header(skb), skb->mac_len);

	assoclen = skb->mac_len;



	data = skb_mac_header(skb) + skb->mac_len;

	datalen = skb_tail_pointer(skb) - data;



	if (hdr->sec.level & IEEE802154_SCF_SECLEVEL_ENC) {

		sg_set_buf(&assoc[1], data, 0);

	} else {

		sg_set_buf(&assoc[1], data, datalen - authlen);

	sg_init_one(&sg, skb_mac_header(skb), assoclen + datalen);



	if (!(hdr->sec.level & IEEE802154_SCF_SECLEVEL_ENC)) {

		assoclen += datalen - authlen;

		data += datalen - authlen;

		datalen = authlen;

	}



	sg_init_one(&src, data, datalen);



	aead_request_set_callback(req, 0, NULL, NULL);

	aead_request_set_assoc(req, assoc, assoclen);

	aead_request_set_crypt(req, &src, &src, datalen, iv);

	aead_request_set_crypt(req, &sg, &sg, datalen, iv);

	aead_request_set_ad(req, assoclen);



	rc = crypto_aead_decrypt(req);