^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright 2003-2004, Instant802 Networks, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright 2005-2006, Devicescape Software, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2014-2015, Qualcomm Atheros, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Rewrite: Copyright (C) 2013 Linaro Ltd <ard.biesheuvel@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <crypto/aead.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "aead_api.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) int aead_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) u8 *data, size_t data_len, u8 *mic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) size_t mic_len = crypto_aead_authsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct scatterlist sg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct aead_request *aead_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u8 *__aad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (!aead_req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) __aad = (u8 *)aead_req + reqsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) memcpy(__aad, aad, aad_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) sg_init_table(sg, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) sg_set_buf(&sg[0], __aad, aad_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) sg_set_buf(&sg[1], data, data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) sg_set_buf(&sg[2], mic, mic_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) aead_request_set_tfm(aead_req, tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) aead_request_set_crypt(aead_req, sg, sg, data_len, b_0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) aead_request_set_ad(aead_req, sg[0].length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) ret = crypto_aead_encrypt(aead_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) kfree_sensitive(aead_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int aead_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, size_t aad_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) u8 *data, size_t data_len, u8 *mic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) size_t mic_len = crypto_aead_authsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct scatterlist sg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct aead_request *aead_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int reqsize = sizeof(*aead_req) + crypto_aead_reqsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) u8 *__aad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (data_len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) aead_req = kzalloc(reqsize + aad_len, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (!aead_req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) __aad = (u8 *)aead_req + reqsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) memcpy(__aad, aad, aad_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) sg_init_table(sg, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) sg_set_buf(&sg[0], __aad, aad_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) sg_set_buf(&sg[1], data, data_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) sg_set_buf(&sg[2], mic, mic_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) aead_request_set_tfm(aead_req, tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) aead_request_set_crypt(aead_req, sg, sg, data_len + mic_len, b_0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) aead_request_set_ad(aead_req, sg[0].length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) err = crypto_aead_decrypt(aead_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) kfree_sensitive(aead_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct crypto_aead *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) aead_key_setup_encrypt(const char *alg, const u8 key[],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) size_t key_len, size_t mic_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct crypto_aead *tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) tfm = crypto_alloc_aead(alg, 0, CRYPTO_ALG_ASYNC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (IS_ERR(tfm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) err = crypto_aead_setkey(tfm, key, key_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) goto free_aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) err = crypto_aead_setauthsize(tfm, mic_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) goto free_aead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) free_aead:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) crypto_free_aead(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) void aead_key_free(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) crypto_free_aead(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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