cregit-Linux how code gets into the kernel

Release 4.11 net/mac80211/aes_gcm.c

Directory: net/mac80211
/*
 * Copyright 2014-2015, Qualcomm Atheros, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/err.h>
#include <crypto/aead.h>

#include <net/mac80211.h>
#include "key.h"
#include "aes_gcm.h"


int ieee80211_aes_gcm_encrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad, u8 *data, size_t data_len, u8 *mic) { struct scatterlist sg[3]; struct aead_request *aead_req; int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm); u8 *__aad; aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC); if (!aead_req) return -ENOMEM; __aad = (u8 *)aead_req + reqsize; memcpy(__aad, aad, GCM_AAD_LEN); sg_init_table(sg, 3); sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad)); sg_set_buf(&sg[1], data, data_len); sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN); aead_request_set_tfm(aead_req, tfm); aead_request_set_crypt(aead_req, sg, sg, data_len, j_0); aead_request_set_ad(aead_req, sg[0].length); crypto_aead_encrypt(aead_req); kzfree(aead_req); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jouni Malinen11859.00%133.33%
Ard Biesheuvel5427.00%133.33%
Herbert Xu2814.00%133.33%
Total200100.00%3100.00%


int ieee80211_aes_gcm_decrypt(struct crypto_aead *tfm, u8 *j_0, u8 *aad, u8 *data, size_t data_len, u8 *mic) { struct scatterlist sg[3]; struct aead_request *aead_req; int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm); u8 *__aad; int err; if (data_len == 0) return -EINVAL; aead_req = kzalloc(reqsize + GCM_AAD_LEN, GFP_ATOMIC); if (!aead_req) return -ENOMEM; __aad = (u8 *)aead_req + reqsize; memcpy(__aad, aad, GCM_AAD_LEN); sg_init_table(sg, 3); sg_set_buf(&sg[0], &__aad[2], be16_to_cpup((__be16 *)__aad)); sg_set_buf(&sg[1], data, data_len); sg_set_buf(&sg[2], mic, IEEE80211_GCMP_MIC_LEN); aead_request_set_tfm(aead_req, tfm); aead_request_set_crypt(aead_req, sg, sg, data_len + IEEE80211_GCMP_MIC_LEN, j_0); aead_request_set_ad(aead_req, sg[0].length); err = crypto_aead_decrypt(aead_req); kzfree(aead_req); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Jouni Malinen12959.45%133.33%
Ard Biesheuvel6027.65%133.33%
Herbert Xu2812.90%133.33%
Total217100.00%3100.00%


struct crypto_aead *ieee80211_aes_gcm_key_setup_encrypt(const u8 key[], size_t key_len) { struct crypto_aead *tfm; int err; tfm = crypto_alloc_aead("gcm(aes)", 0, CRYPTO_ALG_ASYNC); if (IS_ERR(tfm)) return tfm; err = crypto_aead_setkey(tfm, key, key_len); if (err) goto free_aead; err = crypto_aead_setauthsize(tfm, IEEE80211_GCMP_MIC_LEN); if (err) goto free_aead; return tfm; free_aead: crypto_free_aead(tfm); return ERR_PTR(err); }

Contributors

PersonTokensPropCommitsCommitProp
Jouni Malinen8691.49%150.00%
Johannes Berg88.51%150.00%
Total94100.00%2100.00%


void ieee80211_aes_gcm_key_free(struct crypto_aead *tfm) { crypto_free_aead(tfm); }

Contributors

PersonTokensPropCommitsCommitProp
Jouni Malinen15100.00%1100.00%
Total15100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Jouni Malinen36967.34%120.00%
Ard Biesheuvel11420.80%120.00%
Herbert Xu5710.40%240.00%
Johannes Berg81.46%120.00%
Total548100.00%5100.00%
Directory: net/mac80211
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