diff options
Diffstat (limited to 'arch/sparc/crypto/md5_glue.c')
| -rw-r--r-- | arch/sparc/crypto/md5_glue.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/arch/sparc/crypto/md5_glue.c b/arch/sparc/crypto/md5_glue.c deleted file mode 100644 index 511db98d590a..000000000000 --- a/arch/sparc/crypto/md5_glue.c +++ /dev/null @@ -1,190 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* Glue code for MD5 hashing optimized for sparc64 crypto opcodes. - * - * This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c - * and crypto/md5.c which are: - * - * Copyright (c) Alan Smithee. - * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> - * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> - * Copyright (c) Mathias Krause <minipli@googlemail.com> - * Copyright (c) Cryptoapi developers. - * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> - */ - -#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/md5.h> - -#include <asm/pstate.h> -#include <asm/elf.h> - -#include "opcodes.h" - -asmlinkage void md5_sparc64_transform(u32 *digest, const char *data, - unsigned int rounds); - -static int md5_sparc64_init(struct shash_desc *desc) -{ - struct md5_state *mctx = shash_desc_ctx(desc); - - mctx->hash[0] = MD5_H0; - mctx->hash[1] = MD5_H1; - mctx->hash[2] = MD5_H2; - mctx->hash[3] = MD5_H3; - le32_to_cpu_array(mctx->hash, 4); - mctx->byte_count = 0; - - return 0; -} - -static void __md5_sparc64_update(struct md5_state *sctx, const u8 *data, - unsigned int len, unsigned int partial) -{ - unsigned int done = 0; - - sctx->byte_count += len; - if (partial) { - done = MD5_HMAC_BLOCK_SIZE - partial; - memcpy((u8 *)sctx->block + partial, data, done); - md5_sparc64_transform(sctx->hash, (u8 *)sctx->block, 1); - } - if (len - done >= MD5_HMAC_BLOCK_SIZE) { - const unsigned int rounds = (len - done) / MD5_HMAC_BLOCK_SIZE; - - md5_sparc64_transform(sctx->hash, data + done, rounds); - done += rounds * MD5_HMAC_BLOCK_SIZE; - } - - memcpy(sctx->block, data + done, len - done); -} - -static int md5_sparc64_update(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - struct md5_state *sctx = shash_desc_ctx(desc); - unsigned int partial = sctx->byte_count % MD5_HMAC_BLOCK_SIZE; - - /* Handle the fast case right here */ - if (partial + len < MD5_HMAC_BLOCK_SIZE) { - sctx->byte_count += len; - memcpy((u8 *)sctx->block + partial, data, len); - } else - __md5_sparc64_update(sctx, data, len, partial); - - return 0; -} - -/* Add padding and return the message digest. */ -static int md5_sparc64_final(struct shash_desc *desc, u8 *out) -{ - struct md5_state *sctx = shash_desc_ctx(desc); - unsigned int i, index, padlen; - u32 *dst = (u32 *)out; - __le64 bits; - static const u8 padding[MD5_HMAC_BLOCK_SIZE] = { 0x80, }; - - bits = cpu_to_le64(sctx->byte_count << 3); - - /* Pad out to 56 mod 64 and append length */ - index = sctx->byte_count % MD5_HMAC_BLOCK_SIZE; - padlen = (index < 56) ? (56 - index) : ((MD5_HMAC_BLOCK_SIZE+56) - index); - - /* We need to fill a whole block for __md5_sparc64_update() */ - if (padlen <= 56) { - sctx->byte_count += padlen; - memcpy((u8 *)sctx->block + index, padding, padlen); - } else { - __md5_sparc64_update(sctx, padding, padlen, index); - } - __md5_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56); - - /* Store state in digest */ - for (i = 0; i < MD5_HASH_WORDS; i++) - dst[i] = sctx->hash[i]; - - /* Wipe context */ - memset(sctx, 0, sizeof(*sctx)); - - return 0; -} - -static int md5_sparc64_export(struct shash_desc *desc, void *out) -{ - struct md5_state *sctx = shash_desc_ctx(desc); - - memcpy(out, sctx, sizeof(*sctx)); - - return 0; -} - -static int md5_sparc64_import(struct shash_desc *desc, const void *in) -{ - struct md5_state *sctx = shash_desc_ctx(desc); - - memcpy(sctx, in, sizeof(*sctx)); - - return 0; -} - -static struct shash_alg alg = { - .digestsize = MD5_DIGEST_SIZE, - .init = md5_sparc64_init, - .update = md5_sparc64_update, - .final = md5_sparc64_final, - .export = md5_sparc64_export, - .import = md5_sparc64_import, - .descsize = sizeof(struct md5_state), - .statesize = sizeof(struct md5_state), - .base = { - .cra_name = "md5", - .cra_driver_name= "md5-sparc64", - .cra_priority = SPARC_CR_OPCODE_PRIORITY, - .cra_blocksize = MD5_HMAC_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}; - -static bool __init sparc64_has_md5_opcode(void) -{ - unsigned long cfr; - - if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) - return false; - - __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); - if (!(cfr & CFR_MD5)) - return false; - - return true; -} - -static int __init md5_sparc64_mod_init(void) -{ - if (sparc64_has_md5_opcode()) { - pr_info("Using sparc64 md5 opcode optimized MD5 implementation\n"); - return crypto_register_shash(&alg); - } - pr_info("sparc64 md5 opcode not available.\n"); - return -ENODEV; -} - -static void __exit md5_sparc64_mod_fini(void) -{ - crypto_unregister_shash(&alg); -} - -module_init(md5_sparc64_mod_init); -module_exit(md5_sparc64_mod_fini); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("MD5 Message Digest Algorithm, sparc64 md5 opcode accelerated"); - -MODULE_ALIAS_CRYPTO("md5"); - -#include "crop_devid.c" |