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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /net/mac80211/aead_api.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/mac80211/aead_api.c')
-rw-r--r-- | net/mac80211/aead_api.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/net/mac80211/aead_api.c b/net/mac80211/aead_api.c new file mode 100644 index 000000000..b00d6f5b3 --- /dev/null +++ b/net/mac80211/aead_api.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2003-2004, Instant802 Networks, Inc. + * Copyright 2005-2006, Devicescape Software, Inc. + * Copyright 2014-2015, Qualcomm Atheros, Inc. + * + * Rewrite: Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org> + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/err.h> +#include <linux/scatterlist.h> +#include <crypto/aead.h> + +#include "aead_api.h" + +int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len, + u8 *data, size_t data_len, u8 *mic) +{ + size_t mic_len = crypto_aead_authsize(tfm); + struct scatterlist sg[3]; + struct aead_request *aead_req; + int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm); + u8 *__aad; + int ret; + + aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC); + if (!aead_req) + return -ENOMEM; + + __aad = (u8 *)aead_req + reqsize; + memcpy(__aad, aad, aad_len); + + sg_init_table(sg, 3); + sg_set_buf(&sg[0], __aad, aad_len); + 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); + + ret = crypto_aead_encrypt(aead_req); + kfree_sensitive(aead_req); + + return ret; +} + +int aead_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len, + u8 *data, size_t data_len, u8 *mic) +{ + size_t mic_len = crypto_aead_authsize(tfm); + 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 + aad_len, GFP_ATOMIC); + if (!aead_req) + return -ENOMEM; + + __aad = (u8 *)aead_req + reqsize; + memcpy(__aad, aad, aad_len); + + sg_init_table(sg, 3); + sg_set_buf(&sg[0], __aad, aad_len); + 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); + kfree_sensitive(aead_req); + + return err; +} + +struct crypto_aead * +aead_key_setup_encrypt(const char *alg, const u8 key[], + size_t key_len, size_t mic_len) +{ + struct crypto_aead *tfm; + int err; + + tfm = crypto_alloc_aead(alg, 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 aead_key_free(struct crypto_aead *tfm) +{ + crypto_free_aead(tfm); +} |