// SPDX-License-Identifier: GPL-2.0-or-later /* * Cryptographic API. * * Serpent Cipher Algorithm. * * Copyright (C) 2002 Dag Arne Osvik <[email protected]> */ #include <crypto/algapi.h> #include <linux/init.h> #include <linux/module.h> #include <linux/errno.h> #include <asm/unaligned.h> #include <linux/types.h> #include <crypto/serpent.h> /* Key is padded to the maximum of 256 bits before round key generation. * Any key length <= 256 bits (32 bytes) is allowed by the algorithm. */ #define PHI … #define keyiter(a, b, c, d, i, j) … #define loadkeys(x0, x1, x2, x3, i) … #define storekeys(x0, x1, x2, x3, i) … #define store_and_load_keys(x0, x1, x2, x3, s, l) … #define K(x0, x1, x2, x3, i) … #define LK(x0, x1, x2, x3, x4, i) … #define KL(x0, x1, x2, x3, x4, i) … #define S0(x0, x1, x2, x3, x4) … #define S1(x0, x1, x2, x3, x4) … #define S2(x0, x1, x2, x3, x4) … #define S3(x0, x1, x2, x3, x4) … #define S4(x0, x1, x2, x3, x4) … #define S5(x0, x1, x2, x3, x4) … #define S6(x0, x1, x2, x3, x4) … #define S7(x0, x1, x2, x3, x4) … #define SI0(x0, x1, x2, x3, x4) … #define SI1(x0, x1, x2, x3, x4) … #define SI2(x0, x1, x2, x3, x4) … #define SI3(x0, x1, x2, x3, x4) … #define SI4(x0, x1, x2, x3, x4) … #define SI5(x0, x1, x2, x3, x4) … #define SI6(x0, x1, x2, x3, x4) … #define SI7(x0, x1, x2, x3, x4) … /* * both gcc and clang have misoptimized this function in the past, * producing horrible object code from spilling temporary variables * on the stack. Forcing this part out of line avoids that. */ static noinline void __serpent_setkey_sbox(u32 r0, u32 r1, u32 r2, u32 r3, u32 r4, u32 *k) { … } int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key, unsigned int keylen) { … } EXPORT_SYMBOL_GPL(…); int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) { … } EXPORT_SYMBOL_GPL(…); void __serpent_encrypt(const void *c, u8 *dst, const u8 *src) { … } EXPORT_SYMBOL_GPL(…); static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { … } void __serpent_decrypt(const void *c, u8 *dst, const u8 *src) { … } EXPORT_SYMBOL_GPL(…); static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { … } static struct crypto_alg srp_alg = …; static int __init serpent_mod_init(void) { … } static void __exit serpent_mod_fini(void) { … } subsys_initcall(serpent_mod_init); module_exit(serpent_mod_fini); MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_ALIAS_CRYPTO(…) …; MODULE_ALIAS_CRYPTO(…) …;
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