/* * Copyright 2003-2004, Instant802 Networks, Inc. * Copyright 2005-2006, Devicescape Software, Inc. * * Rewrite: Copyright (C) 2013 Linaro Ltd * * 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 #include #include #include #include #include "key.h" #include "aes_ccm.h" int ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, u8 *data, size_t data_len, u8 *mic, size_t mic_len) { struct scatterlist sg[3]; struct aead_request *aead_req; int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm); u8 *__aad; aead_req = kzalloc(reqsize + CCM_AAD_LEN, GFP_ATOMIC); if (!aead_req) return -ENOMEM; __aad = (u8 *)aead_req + reqsize; memcpy(__aad, aad, CCM_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, mic_len); aead_request_set_tfm(aead_req, tfm); aead_request_set_crypt(aead_req, sg, sg, data_len, b_0); aead_request_set_ad(aead_req, sg[0].length); crypto_aead_encrypt(aead_req); kzfree(aead_req); return 0; } int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, u8 *data, size_t data_len, u8 *mic, size_t mic_len) { 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 + CCM_AAD_LEN, GFP_ATOMIC); if (!aead_req) return -ENOMEM; __aad = (u8 *)aead_req + reqsize; memcpy(__aad, aad, CCM_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, mic_len); aead_request_set_tfm(aead_req, tfm); aead_request_set_crypt(aead_req, sg, sg, data_len + mic_len, b_0); aead_request_set_ad(aead_req, sg[0].length); err = crypto_aead_decrypt(aead_req); kzfree(aead_req); return err; } struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[], size_t key_len, size_t mic_len) { struct crypto_aead *tfm; int err; tfm = crypto_alloc_aead("ccm(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, mic_len); if (err) goto free_aead; return tfm; free_aead: crypto_free_aead(tfm); return ERR_PTR(err); } void ieee80211_aes_key_free(struct crypto_aead *tfm) { crypto_free_aead(tfm); } ass='txt' type='search' size='10' name='q' value=''/>
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authorJohannes Berg <johannes.berg@intel.com>2017-01-26 17:15:44 +0100
committerJohannes Berg <johannes.berg@intel.com>2017-01-26 18:03:09 +0100
commit228c8c6b1f4376788e9d5ab00d50b10228eb40d3 (patch)
treedfd7010fa9480284fe72bb2c4ab50a5225792a10 /include/net/nfc/digital.h
parent731977e97b3697454a862fec656c2561eabc0b87 (diff)
wireless: define cipher/AKM suites using a macro
The spec writes cipher/AKM suites as something like 00-0F-AC:9, but the part after the colon isn't hex, it's decimal, so that we've already had a few mistakes (in other code, or unmerged patches) to e.g. write 0x000FAC10 instead of 0x000FAC0A. Use a macro to avoid that problem. Reviewed-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'include/net/nfc/digital.h')