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The crypto glue performed function prototype casting via macros to make indirect calls to assembly routines. Instead of performing casts at the call sites (which trips Control Flow Integrity prototype checking), switch each prototype to a common standard set of arguments which allows the removal of the existing macros. In order to keep pointer math unchanged, internal casting between u128 pointers and u8 pointers is added. Co-developed-by: João Moreira <joao.moreira@intel.com> Signed-off-by: João Moreira <joao.moreira@intel.com> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
29 lines
696 B
C
29 lines
696 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Common values for serpent algorithms
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*/
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#ifndef _CRYPTO_SERPENT_H
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#define _CRYPTO_SERPENT_H
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#include <linux/types.h>
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#include <linux/crypto.h>
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#define SERPENT_MIN_KEY_SIZE 0
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#define SERPENT_MAX_KEY_SIZE 32
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#define SERPENT_EXPKEY_WORDS 132
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#define SERPENT_BLOCK_SIZE 16
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struct serpent_ctx {
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u32 expkey[SERPENT_EXPKEY_WORDS];
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};
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int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key,
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unsigned int keylen);
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int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen);
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void __serpent_encrypt(const void *ctx, u8 *dst, const u8 *src);
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void __serpent_decrypt(const void *ctx, u8 *dst, const u8 *src);
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#endif
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