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Commit 6e1ee5d2 authored by Jan-Simon Möller's avatar Jan-Simon Möller Committed by Johannes Berg
Browse files

mac80211: remove VLAIS usage from mac80211 



Replaced the use of a Variable Length Array In Struct (VLAIS) with a
C99 compliant equivalent. This is the original VLAIS struct.

struct {
	struct aead_request     req;
	u8                      priv[crypto_aead_reqsize(tfm)];
} aead_req;

This patch instead allocates the appropriate amount of memory using a
char array.

The new code can be compiled with both gcc and clang.

Signed-off-by: default avatarJan-Simon Möller <dl9pf@gmx.de>
Signed-off-by: default avatarBehan Webster <behanw@converseincode.com>
[small style cleanups]
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent cd6362be

net/mac80211/aes_ccm.c

+19 −18
Original line number Diff line number Diff line
@@ -23,12 +23,13 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, 
			       u8 *data, size_t data_len, u8 *mic)

{

	struct scatterlist assoc, pt, ct[2];

	struct {

		struct aead_request	req;

		u8			priv[crypto_aead_reqsize(tfm)];

	} aead_req;



	memset(&aead_req, 0, sizeof(aead_req));

	char aead_req_data[sizeof(struct aead_request) +

			   crypto_aead_reqsize(tfm)]

		__aligned(__alignof__(struct aead_request));

	struct aead_request *aead_req = (void *) aead_req_data;



	memset(aead_req, 0, sizeof(aead_req_data));



	sg_init_one(&pt, data, data_len);

	sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad));
@@ -36,23 +37,23 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, 
	sg_set_buf(&ct[0], data, data_len);

	sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN);



	aead_request_set_tfm(&aead_req.req, tfm);

	aead_request_set_assoc(&aead_req.req, &assoc, assoc.length);

	aead_request_set_crypt(&aead_req.req, &pt, ct, data_len, b_0);

	aead_request_set_tfm(aead_req, tfm);

	aead_request_set_assoc(aead_req, &assoc, assoc.length);

	aead_request_set_crypt(aead_req, &pt, ct, data_len, b_0);



	crypto_aead_encrypt(&aead_req.req);

	crypto_aead_encrypt(aead_req);

}



int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad,

			      u8 *data, size_t data_len, u8 *mic)

{

	struct scatterlist assoc, pt, ct[2];

	struct {

		struct aead_request	req;

		u8			priv[crypto_aead_reqsize(tfm)];

	} aead_req;

	char aead_req_data[sizeof(struct aead_request) +

			   crypto_aead_reqsize(tfm)]

		__aligned(__alignof__(struct aead_request));

	struct aead_request *aead_req = (void *) aead_req_data;



	memset(&aead_req, 0, sizeof(aead_req));

	memset(aead_req, 0, sizeof(aead_req_data));



	sg_init_one(&pt, data, data_len);

	sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad));
@@ -60,12 +61,12 @@ int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, 
	sg_set_buf(&ct[0], data, data_len);

	sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN);



	aead_request_set_tfm(&aead_req.req, tfm);

	aead_request_set_assoc(&aead_req.req, &assoc, assoc.length);

	aead_request_set_crypt(&aead_req.req, ct, &pt,

	aead_request_set_tfm(aead_req, tfm);

	aead_request_set_assoc(aead_req, &assoc, assoc.length);

	aead_request_set_crypt(aead_req, ct, &pt,

			       data_len + IEEE80211_CCMP_MIC_LEN, b_0);



	return crypto_aead_decrypt(&aead_req.req);

	return crypto_aead_decrypt(aead_req);

}



struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[])