diff options
Diffstat (limited to 'arch/sparc/crypto/sha256_glue.c')
| -rw-r--r-- | arch/sparc/crypto/sha256_glue.c | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/arch/sparc/crypto/sha256_glue.c b/arch/sparc/crypto/sha256_glue.c deleted file mode 100644 index 285561a1cde5..000000000000 --- a/arch/sparc/crypto/sha256_glue.c +++ /dev/null @@ -1,210 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* Glue code for SHA256 hashing optimized for sparc64 crypto opcodes. - * - * This is based largely upon crypto/sha256_generic.c - * - * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> - * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> - * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> - * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <crypto/internal/hash.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/mm.h> -#include <linux/types.h> -#include <crypto/sha2.h> -#include <crypto/sha256_base.h> - -#include <asm/pstate.h> -#include <asm/elf.h> - -#include "opcodes.h" - -asmlinkage void sha256_sparc64_transform(u32 *digest, const char *data, - unsigned int rounds); - -static void __sha256_sparc64_update(struct sha256_state *sctx, const u8 *data, - unsigned int len, unsigned int partial) -{ - unsigned int done = 0; - - sctx->count += len; - if (partial) { - done = SHA256_BLOCK_SIZE - partial; - memcpy(sctx->buf + partial, data, done); - sha256_sparc64_transform(sctx->state, sctx->buf, 1); - } - if (len - done >= SHA256_BLOCK_SIZE) { - const unsigned int rounds = (len - done) / SHA256_BLOCK_SIZE; - - sha256_sparc64_transform(sctx->state, data + done, rounds); - done += rounds * SHA256_BLOCK_SIZE; - } - - memcpy(sctx->buf, data + done, len - done); -} - -static int sha256_sparc64_update(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - unsigned int partial = sctx->count % SHA256_BLOCK_SIZE; - - /* Handle the fast case right here */ - if (partial + len < SHA256_BLOCK_SIZE) { - sctx->count += len; - memcpy(sctx->buf + partial, data, len); - } else - __sha256_sparc64_update(sctx, data, len, partial); - - return 0; -} - -static int sha256_sparc64_final(struct shash_desc *desc, u8 *out) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - unsigned int i, index, padlen; - __be32 *dst = (__be32 *)out; - __be64 bits; - static const u8 padding[SHA256_BLOCK_SIZE] = { 0x80, }; - - bits = cpu_to_be64(sctx->count << 3); - - /* Pad out to 56 mod 64 and append length */ - index = sctx->count % SHA256_BLOCK_SIZE; - padlen = (index < 56) ? (56 - index) : ((SHA256_BLOCK_SIZE+56) - index); - - /* We need to fill a whole block for __sha256_sparc64_update() */ - if (padlen <= 56) { - sctx->count += padlen; - memcpy(sctx->buf + index, padding, padlen); - } else { - __sha256_sparc64_update(sctx, padding, padlen, index); - } - __sha256_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56); - - /* Store state in digest */ - for (i = 0; i < 8; i++) - dst[i] = cpu_to_be32(sctx->state[i]); - - /* Wipe context */ - memset(sctx, 0, sizeof(*sctx)); - - return 0; -} - -static int sha224_sparc64_final(struct shash_desc *desc, u8 *hash) -{ - u8 D[SHA256_DIGEST_SIZE]; - - sha256_sparc64_final(desc, D); - - memcpy(hash, D, SHA224_DIGEST_SIZE); - memzero_explicit(D, SHA256_DIGEST_SIZE); - - return 0; -} - -static int sha256_sparc64_export(struct shash_desc *desc, void *out) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - - memcpy(out, sctx, sizeof(*sctx)); - return 0; -} - -static int sha256_sparc64_import(struct shash_desc *desc, const void *in) -{ - struct sha256_state *sctx = shash_desc_ctx(desc); - - memcpy(sctx, in, sizeof(*sctx)); - return 0; -} - -static struct shash_alg sha256_alg = { - .digestsize = SHA256_DIGEST_SIZE, - .init = sha256_base_init, - .update = sha256_sparc64_update, - .final = sha256_sparc64_final, - .export = sha256_sparc64_export, - .import = sha256_sparc64_import, - .descsize = sizeof(struct sha256_state), - .statesize = sizeof(struct sha256_state), - .base = { - .cra_name = "sha256", - .cra_driver_name= "sha256-sparc64", - .cra_priority = SPARC_CR_OPCODE_PRIORITY, - .cra_blocksize = SHA256_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}; - -static struct shash_alg sha224_alg = { - .digestsize = SHA224_DIGEST_SIZE, - .init = sha224_base_init, - .update = sha256_sparc64_update, - .final = sha224_sparc64_final, - .descsize = sizeof(struct sha256_state), - .base = { - .cra_name = "sha224", - .cra_driver_name= "sha224-sparc64", - .cra_priority = SPARC_CR_OPCODE_PRIORITY, - .cra_blocksize = SHA224_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}; - -static bool __init sparc64_has_sha256_opcode(void) -{ - unsigned long cfr; - - if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) - return false; - - __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); - if (!(cfr & CFR_SHA256)) - return false; - - return true; -} - -static int __init sha256_sparc64_mod_init(void) -{ - if (sparc64_has_sha256_opcode()) { - int ret = crypto_register_shash(&sha224_alg); - if (ret < 0) - return ret; - - ret = crypto_register_shash(&sha256_alg); - if (ret < 0) { - crypto_unregister_shash(&sha224_alg); - return ret; - } - - pr_info("Using sparc64 sha256 opcode optimized SHA-256/SHA-224 implementation\n"); - return 0; - } - pr_info("sparc64 sha256 opcode not available.\n"); - return -ENODEV; -} - -static void __exit sha256_sparc64_mod_fini(void) -{ - crypto_unregister_shash(&sha224_alg); - crypto_unregister_shash(&sha256_alg); -} - -module_init(sha256_sparc64_mod_init); -module_exit(sha256_sparc64_mod_fini); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm, sparc64 sha256 opcode accelerated"); - -MODULE_ALIAS_CRYPTO("sha224"); -MODULE_ALIAS_CRYPTO("sha256"); - -#include "crop_devid.c" |