1// SPDX-License-Identifier: GPL-2.0-only 2/* Copyright (c) 2024 Meta, Inc */ 3#include <linux/types.h> 4#include <linux/module.h> 5#include <linux/bpf_crypto.h> 6#include <crypto/skcipher.h> 7 8static void *bpf_crypto_lskcipher_alloc_tfm(const char *algo) 9{ 10 return crypto_alloc_lskcipher(algo, 0, 0); 11} 12 13static void bpf_crypto_lskcipher_free_tfm(void *tfm) 14{ 15 crypto_free_lskcipher(tfm); 16} 17 18static int bpf_crypto_lskcipher_has_algo(const char *algo) 19{ 20 return crypto_has_skcipher(algo, CRYPTO_ALG_TYPE_LSKCIPHER, CRYPTO_ALG_TYPE_MASK); 21} 22 23static int bpf_crypto_lskcipher_setkey(void *tfm, const u8 *key, unsigned int keylen) 24{ 25 return crypto_lskcipher_setkey(tfm, key, keylen); 26} 27 28static u32 bpf_crypto_lskcipher_get_flags(void *tfm) 29{ 30 return crypto_lskcipher_get_flags(tfm); 31} 32 33static unsigned int bpf_crypto_lskcipher_ivsize(void *tfm) 34{ 35 return crypto_lskcipher_ivsize(tfm); 36} 37 38static unsigned int bpf_crypto_lskcipher_statesize(void *tfm) 39{ 40 return crypto_lskcipher_statesize(tfm); 41} 42 43static int bpf_crypto_lskcipher_encrypt(void *tfm, const u8 *src, u8 *dst, 44 unsigned int len, u8 *siv) 45{ 46 return crypto_lskcipher_encrypt(tfm, src, dst, len, siv); 47} 48 49static int bpf_crypto_lskcipher_decrypt(void *tfm, const u8 *src, u8 *dst, 50 unsigned int len, u8 *siv) 51{ 52 return crypto_lskcipher_decrypt(tfm, src, dst, len, siv); 53} 54 55static const struct bpf_crypto_type bpf_crypto_lskcipher_type = { 56 .alloc_tfm = bpf_crypto_lskcipher_alloc_tfm, 57 .free_tfm = bpf_crypto_lskcipher_free_tfm, 58 .has_algo = bpf_crypto_lskcipher_has_algo, 59 .setkey = bpf_crypto_lskcipher_setkey, 60 .encrypt = bpf_crypto_lskcipher_encrypt, 61 .decrypt = bpf_crypto_lskcipher_decrypt, 62 .ivsize = bpf_crypto_lskcipher_ivsize, 63 .statesize = bpf_crypto_lskcipher_statesize, 64 .get_flags = bpf_crypto_lskcipher_get_flags, 65 .owner = THIS_MODULE, 66 .name = "skcipher", 67}; 68 69static int __init bpf_crypto_skcipher_init(void) 70{ 71 return bpf_crypto_register_type(&bpf_crypto_lskcipher_type); 72} 73 74static void __exit bpf_crypto_skcipher_exit(void) 75{ 76 int err = bpf_crypto_unregister_type(&bpf_crypto_lskcipher_type); 77 WARN_ON_ONCE(err); 78} 79 80module_init(bpf_crypto_skcipher_init); 81module_exit(bpf_crypto_skcipher_exit); 82MODULE_LICENSE("GPL"); 83