diff options
Diffstat (limited to 'arch/mips/crypto/chacha-glue.c')
| -rw-r--r-- | arch/mips/crypto/chacha-glue.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/arch/mips/crypto/chacha-glue.c b/arch/mips/crypto/chacha-glue.c deleted file mode 100644 index f6fc2e1079a1..000000000000 --- a/arch/mips/crypto/chacha-glue.c +++ /dev/null @@ -1,146 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * MIPS accelerated ChaCha and XChaCha stream ciphers, - * including ChaCha20 (RFC7539) - * - * Copyright (C) 2019 Linaro, Ltd. <ard.biesheuvel@linaro.org> - */ - -#include <asm/byteorder.h> -#include <crypto/algapi.h> -#include <crypto/internal/chacha.h> -#include <crypto/internal/skcipher.h> -#include <linux/kernel.h> -#include <linux/module.h> - -asmlinkage void chacha_crypt_arch(u32 *state, u8 *dst, const u8 *src, - unsigned int bytes, int nrounds); -EXPORT_SYMBOL(chacha_crypt_arch); - -asmlinkage void hchacha_block_arch(const u32 *state, u32 *stream, int nrounds); -EXPORT_SYMBOL(hchacha_block_arch); - -static int chacha_mips_stream_xor(struct skcipher_request *req, - const struct chacha_ctx *ctx, const u8 *iv) -{ - struct skcipher_walk walk; - u32 state[16]; - int err; - - err = skcipher_walk_virt(&walk, req, false); - - chacha_init(state, ctx->key, iv); - - while (walk.nbytes > 0) { - unsigned int nbytes = walk.nbytes; - - if (nbytes < walk.total) - nbytes = round_down(nbytes, walk.stride); - - chacha_crypt(state, walk.dst.virt.addr, walk.src.virt.addr, - nbytes, ctx->nrounds); - err = skcipher_walk_done(&walk, walk.nbytes - nbytes); - } - - return err; -} - -static int chacha_mips(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm); - - return chacha_mips_stream_xor(req, ctx, req->iv); -} - -static int xchacha_mips(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm); - struct chacha_ctx subctx; - u32 state[16]; - u8 real_iv[16]; - - chacha_init(state, ctx->key, req->iv); - - hchacha_block(state, subctx.key, ctx->nrounds); - subctx.nrounds = ctx->nrounds; - - memcpy(&real_iv[0], req->iv + 24, 8); - memcpy(&real_iv[8], req->iv + 16, 8); - return chacha_mips_stream_xor(req, &subctx, real_iv); -} - -static struct skcipher_alg algs[] = { - { - .base.cra_name = "chacha20", - .base.cra_driver_name = "chacha20-mips", - .base.cra_priority = 200, - .base.cra_blocksize = 1, - .base.cra_ctxsize = sizeof(struct chacha_ctx), - .base.cra_module = THIS_MODULE, - - .min_keysize = CHACHA_KEY_SIZE, - .max_keysize = CHACHA_KEY_SIZE, - .ivsize = CHACHA_IV_SIZE, - .chunksize = CHACHA_BLOCK_SIZE, - .setkey = chacha20_setkey, - .encrypt = chacha_mips, - .decrypt = chacha_mips, - }, { - .base.cra_name = "xchacha20", - .base.cra_driver_name = "xchacha20-mips", - .base.cra_priority = 200, - .base.cra_blocksize = 1, - .base.cra_ctxsize = sizeof(struct chacha_ctx), - .base.cra_module = THIS_MODULE, - - .min_keysize = CHACHA_KEY_SIZE, - .max_keysize = CHACHA_KEY_SIZE, - .ivsize = XCHACHA_IV_SIZE, - .chunksize = CHACHA_BLOCK_SIZE, - .setkey = chacha20_setkey, - .encrypt = xchacha_mips, - .decrypt = xchacha_mips, - }, { - .base.cra_name = "xchacha12", - .base.cra_driver_name = "xchacha12-mips", - .base.cra_priority = 200, - .base.cra_blocksize = 1, - .base.cra_ctxsize = sizeof(struct chacha_ctx), - .base.cra_module = THIS_MODULE, - - .min_keysize = CHACHA_KEY_SIZE, - .max_keysize = CHACHA_KEY_SIZE, - .ivsize = XCHACHA_IV_SIZE, - .chunksize = CHACHA_BLOCK_SIZE, - .setkey = chacha12_setkey, - .encrypt = xchacha_mips, - .decrypt = xchacha_mips, - } -}; - -static int __init chacha_simd_mod_init(void) -{ - return IS_REACHABLE(CONFIG_CRYPTO_SKCIPHER) ? - crypto_register_skciphers(algs, ARRAY_SIZE(algs)) : 0; -} - -static void __exit chacha_simd_mod_fini(void) -{ - if (IS_REACHABLE(CONFIG_CRYPTO_SKCIPHER)) - crypto_unregister_skciphers(algs, ARRAY_SIZE(algs)); -} - -module_init(chacha_simd_mod_init); -module_exit(chacha_simd_mod_fini); - -MODULE_DESCRIPTION("ChaCha and XChaCha stream ciphers (MIPS accelerated)"); -MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_CRYPTO("chacha20"); -MODULE_ALIAS_CRYPTO("chacha20-mips"); -MODULE_ALIAS_CRYPTO("xchacha20"); -MODULE_ALIAS_CRYPTO("xchacha20-mips"); -MODULE_ALIAS_CRYPTO("xchacha12"); -MODULE_ALIAS_CRYPTO("xchacha12-mips"); |