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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071// SPDX-License-Identifier: GPL-2.0-or-later/* * The ChaCha stream cipher (RFC7539) * * Copyright (C) 2015 Martin Willi */
#include <crypto/chacha.h>#include <crypto/utils.h>#include <linux/export.h>#include <linux/kernel.h>#include <linux/module.h>
static void __maybe_unused chacha_crypt_generic(struct chacha_state *state, u8 *dst, const u8 *src, size_t bytes, int nrounds){ /* aligned to potentially speed up crypto_xor() */ u8 stream[CHACHA_BLOCK_SIZE] __aligned(sizeof(long));
while (bytes >= CHACHA_BLOCK_SIZE) { chacha_block_generic(state, stream, nrounds); crypto_xor_cpy(dst, src, stream, CHACHA_BLOCK_SIZE); bytes -= CHACHA_BLOCK_SIZE; dst += CHACHA_BLOCK_SIZE; src += CHACHA_BLOCK_SIZE; } if (bytes) { chacha_block_generic(state, stream, nrounds); crypto_xor_cpy(dst, src, stream, bytes); }}
#ifdef CONFIG_CRYPTO_LIB_CHACHA_ARCH#include "chacha.h" /* $(SRCARCH)/chacha.h */#else#define chacha_crypt_arch chacha_crypt_generic#define hchacha_block_arch hchacha_block_generic#endif
void chacha_crypt(struct chacha_state *state, u8 *dst, const u8 *src, size_t bytes, int nrounds){ chacha_crypt_arch(state, dst, src, bytes, nrounds);}EXPORT_SYMBOL_GPL(chacha_crypt);
void hchacha_block(const struct chacha_state *state, u32 out[HCHACHA_OUT_WORDS], int nrounds){ hchacha_block_arch(state, out, nrounds);}EXPORT_SYMBOL_GPL(hchacha_block);
#ifdef chacha_mod_init_archstatic int __init chacha_mod_init(void){ chacha_mod_init_arch(); return 0;}subsys_initcall(chacha_mod_init);
static void __exit chacha_mod_exit(void){}module_exit(chacha_mod_exit);#endif
MODULE_DESCRIPTION("ChaCha stream cipher (RFC7539)");MODULE_LICENSE("GPL");