diff options
Diffstat (limited to 'arch/arm64/crypto/sha256-glue.c')
| -rw-r--r-- | arch/arm64/crypto/sha256-glue.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/arch/arm64/crypto/sha256-glue.c b/arch/arm64/crypto/sha256-glue.c deleted file mode 100644 index 35356987cc1e..000000000000 --- a/arch/arm64/crypto/sha256-glue.c +++ /dev/null @@ -1,194 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Linux/arm64 port of the OpenSSL SHA256 implementation for AArch64 - * - * Copyright (c) 2016 Linaro Ltd. <ard.biesheuvel@linaro.org> - */ - -#include <asm/hwcap.h> -#include <asm/neon.h> -#include <asm/simd.h> -#include <crypto/internal/hash.h> -#include <crypto/internal/simd.h> -#include <crypto/sha2.h> -#include <crypto/sha256_base.h> -#include <linux/module.h> -#include <linux/string.h> -#include <linux/types.h> - -MODULE_DESCRIPTION("SHA-224/SHA-256 secure hash for arm64"); -MODULE_AUTHOR("Andy Polyakov <appro@openssl.org>"); -MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_CRYPTO("sha224"); -MODULE_ALIAS_CRYPTO("sha256"); - -asmlinkage void sha256_block_data_order(u32 *digest, const void *data, - unsigned int num_blks); -EXPORT_SYMBOL(sha256_block_data_order); - -static void sha256_arm64_transform(struct sha256_state *sst, u8 const *src, - int blocks) -{ - sha256_block_data_order(sst->state, src, blocks); -} - -asmlinkage void sha256_block_neon(u32 *digest, const void *data, - unsigned int num_blks); - -static void sha256_neon_transform(struct sha256_state *sst, u8 const *src, - int blocks) -{ - sha256_block_neon(sst->state, src, blocks); -} - -static int crypto_sha256_arm64_update(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - return sha256_base_do_update(desc, data, len, sha256_arm64_transform); -} - -static int crypto_sha256_arm64_finup(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - if (len) - sha256_base_do_update(desc, data, len, sha256_arm64_transform); - sha256_base_do_finalize(desc, sha256_arm64_transform); - - return sha256_base_finish(desc, out); -} - -static int crypto_sha256_arm64_final(struct shash_desc *desc, u8 *out) -{ - return crypto_sha256_arm64_finup(desc, NULL, 0, out); -} - -static struct shash_alg algs[] = { { - .digestsize = SHA256_DIGEST_SIZE, - .init = sha256_base_init, - .update = crypto_sha256_arm64_update, - .final = crypto_sha256_arm64_final, - .finup = crypto_sha256_arm64_finup, - .descsize = sizeof(struct sha256_state), - .base.cra_name = "sha256", - .base.cra_driver_name = "sha256-arm64", - .base.cra_priority = 125, - .base.cra_blocksize = SHA256_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}, { - .digestsize = SHA224_DIGEST_SIZE, - .init = sha224_base_init, - .update = crypto_sha256_arm64_update, - .final = crypto_sha256_arm64_final, - .finup = crypto_sha256_arm64_finup, - .descsize = sizeof(struct sha256_state), - .base.cra_name = "sha224", - .base.cra_driver_name = "sha224-arm64", - .base.cra_priority = 125, - .base.cra_blocksize = SHA224_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -} }; - -static int sha256_update_neon(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - - if (!crypto_simd_usable()) - return sha256_base_do_update(desc, data, len, - sha256_arm64_transform); - - while (len > 0) { - unsigned int chunk = len; - - /* - * Don't hog the CPU for the entire time it takes to process all - * input when running on a preemptible kernel, but process the - * data block by block instead. - */ - if (IS_ENABLED(CONFIG_PREEMPTION) && - chunk + sctx->count % SHA256_BLOCK_SIZE > SHA256_BLOCK_SIZE) - chunk = SHA256_BLOCK_SIZE - - sctx->count % SHA256_BLOCK_SIZE; - - kernel_neon_begin(); - sha256_base_do_update(desc, data, chunk, sha256_neon_transform); - kernel_neon_end(); - data += chunk; - len -= chunk; - } - return 0; -} - -static int sha256_finup_neon(struct shash_desc *desc, const u8 *data, - unsigned int len, u8 *out) -{ - if (!crypto_simd_usable()) { - if (len) - sha256_base_do_update(desc, data, len, - sha256_arm64_transform); - sha256_base_do_finalize(desc, sha256_arm64_transform); - } else { - if (len) - sha256_update_neon(desc, data, len); - kernel_neon_begin(); - sha256_base_do_finalize(desc, sha256_neon_transform); - kernel_neon_end(); - } - return sha256_base_finish(desc, out); -} - -static int sha256_final_neon(struct shash_desc *desc, u8 *out) -{ - return sha256_finup_neon(desc, NULL, 0, out); -} - -static struct shash_alg neon_algs[] = { { - .digestsize = SHA256_DIGEST_SIZE, - .init = sha256_base_init, - .update = sha256_update_neon, - .final = sha256_final_neon, - .finup = sha256_finup_neon, - .descsize = sizeof(struct sha256_state), - .base.cra_name = "sha256", - .base.cra_driver_name = "sha256-arm64-neon", - .base.cra_priority = 150, - .base.cra_blocksize = SHA256_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -}, { - .digestsize = SHA224_DIGEST_SIZE, - .init = sha224_base_init, - .update = sha256_update_neon, - .final = sha256_final_neon, - .finup = sha256_finup_neon, - .descsize = sizeof(struct sha256_state), - .base.cra_name = "sha224", - .base.cra_driver_name = "sha224-arm64-neon", - .base.cra_priority = 150, - .base.cra_blocksize = SHA224_BLOCK_SIZE, - .base.cra_module = THIS_MODULE, -} }; - -static int __init sha256_mod_init(void) -{ - int ret = crypto_register_shashes(algs, ARRAY_SIZE(algs)); - if (ret) - return ret; - - if (cpu_have_named_feature(ASIMD)) { - ret = crypto_register_shashes(neon_algs, ARRAY_SIZE(neon_algs)); - if (ret) - crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); - } - return ret; -} - -static void __exit sha256_mod_fini(void) -{ - if (cpu_have_named_feature(ASIMD)) - crypto_unregister_shashes(neon_algs, ARRAY_SIZE(neon_algs)); - crypto_unregister_shashes(algs, ARRAY_SIZE(algs)); -} - -module_init(sha256_mod_init); -module_exit(sha256_mod_fini); |