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mac80211: aead api to reduce redundancy

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Currently, the aes_ccm.c and aes_gcm.c are almost line by line copy of
each other. This patch reduce code redundancy by moving the code in these
two files to crypto/aead_api.c to make it a higher level aead api. The
file aes_ccm.c and aes_gcm.c are removed and all the functions there are
now implemented in their headers using the newly added aead api.

Signed-off-by: Xiang Gao <qasdfgtyuiop@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Xiang Gao
2017-10-10 22:31:49 -04:00
committed by Johannes Berg
parent 8c03145a2e
commit 4133da7306
7 changed files with 111 additions and 152 deletions
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38
net/mac80211/aes_gcm.h
View File

@@ -9,16 +9,38 @@
#ifndef AES_GCM_H
#define AES_GCM_H
#include <linux/crypto.h>
#include "aead_api.h"
#define GCM_AAD_LEN 32
int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
u8 *data, size_t data_len, u8 *mic);
int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad,
u8 *data, size_t data_len, u8 *mic);
struct crypto_aead *ieee80211_aes_gcm_key_setup_encrypt(const u8 key[],
size_t key_len);
void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm);
static inline int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm,
u8 *j_0, u8 *aad, u8 *data,
size_t data_len, u8 *mic)
{
return aead_encrypt(tfm, j_0, aad + 2,
be16_to_cpup((__be16 *)aad),
data, data_len, mic);
}
static inline int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm,
u8 *j_0, u8 *aad, u8 *data,
size_t data_len, u8 *mic)
{
return aead_decrypt(tfm, j_0, aad + 2,
be16_to_cpup((__be16 *)aad),
data, data_len, mic);
}
static inline struct crypto_aead *
ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len)
{
return aead_key_setup_encrypt("gcm(aes)", key,
key_len, IEEE80211_GCMP_MIC_LEN);
}
static inline void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm)
{
return aead_key_free(tfm);
}
#endif /* AES_GCM_H */