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Diffstat (limited to 'ANDROID_3.4.5/arch/x86/crypto/sha1_ssse3_glue.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/crypto/sha1_ssse3_glue.c240
1 files changed, 0 insertions, 240 deletions
diff --git a/ANDROID_3.4.5/arch/x86/crypto/sha1_ssse3_glue.c b/ANDROID_3.4.5/arch/x86/crypto/sha1_ssse3_glue.c
deleted file mode 100644
index f916499d..00000000
--- a/ANDROID_3.4.5/arch/x86/crypto/sha1_ssse3_glue.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * Cryptographic API.
- *
- * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
- * Supplemental SSE3 instructions.
- *
- * This file is based on sha1_generic.c
- *
- * 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>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- */
-
-#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/cryptohash.h>
-#include <linux/types.h>
-#include <crypto/sha.h>
-#include <asm/byteorder.h>
-#include <asm/i387.h>
-#include <asm/xcr.h>
-#include <asm/xsave.h>
-
-
-asmlinkage void sha1_transform_ssse3(u32 *digest, const char *data,
- unsigned int rounds);
-#ifdef SHA1_ENABLE_AVX_SUPPORT
-asmlinkage void sha1_transform_avx(u32 *digest, const char *data,
- unsigned int rounds);
-#endif
-
-static asmlinkage void (*sha1_transform_asm)(u32 *, const char *, unsigned int);
-
-
-static int sha1_ssse3_init(struct shash_desc *desc)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
-
- *sctx = (struct sha1_state){
- .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
- };
-
- return 0;
-}
-
-static int __sha1_ssse3_update(struct shash_desc *desc, const u8 *data,
- unsigned int len, unsigned int partial)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- unsigned int done = 0;
-
- sctx->count += len;
-
- if (partial) {
- done = SHA1_BLOCK_SIZE - partial;
- memcpy(sctx->buffer + partial, data, done);
- sha1_transform_asm(sctx->state, sctx->buffer, 1);
- }
-
- if (len - done >= SHA1_BLOCK_SIZE) {
- const unsigned int rounds = (len - done) / SHA1_BLOCK_SIZE;
-
- sha1_transform_asm(sctx->state, data + done, rounds);
- done += rounds * SHA1_BLOCK_SIZE;
- }
-
- memcpy(sctx->buffer, data + done, len - done);
-
- return 0;
-}
-
-static int sha1_ssse3_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- unsigned int partial = sctx->count % SHA1_BLOCK_SIZE;
- int res;
-
- /* Handle the fast case right here */
- if (partial + len < SHA1_BLOCK_SIZE) {
- sctx->count += len;
- memcpy(sctx->buffer + partial, data, len);
-
- return 0;
- }
-
- if (!irq_fpu_usable()) {
- res = crypto_sha1_update(desc, data, len);
- } else {
- kernel_fpu_begin();
- res = __sha1_ssse3_update(desc, data, len, partial);
- kernel_fpu_end();
- }
-
- return res;
-}
-
-
-/* Add padding and return the message digest. */
-static int sha1_ssse3_final(struct shash_desc *desc, u8 *out)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
- unsigned int i, index, padlen;
- __be32 *dst = (__be32 *)out;
- __be64 bits;
- static const u8 padding[SHA1_BLOCK_SIZE] = { 0x80, };
-
- bits = cpu_to_be64(sctx->count << 3);
-
- /* Pad out to 56 mod 64 and append length */
- index = sctx->count % SHA1_BLOCK_SIZE;
- padlen = (index < 56) ? (56 - index) : ((SHA1_BLOCK_SIZE+56) - index);
- if (!irq_fpu_usable()) {
- crypto_sha1_update(desc, padding, padlen);
- crypto_sha1_update(desc, (const u8 *)&bits, sizeof(bits));
- } else {
- kernel_fpu_begin();
- /* We need to fill a whole block for __sha1_ssse3_update() */
- if (padlen <= 56) {
- sctx->count += padlen;
- memcpy(sctx->buffer + index, padding, padlen);
- } else {
- __sha1_ssse3_update(desc, padding, padlen, index);
- }
- __sha1_ssse3_update(desc, (const u8 *)&bits, sizeof(bits), 56);
- kernel_fpu_end();
- }
-
- /* Store state in digest */
- for (i = 0; i < 5; i++)
- dst[i] = cpu_to_be32(sctx->state[i]);
-
- /* Wipe context */
- memset(sctx, 0, sizeof(*sctx));
-
- return 0;
-}
-
-static int sha1_ssse3_export(struct shash_desc *desc, void *out)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
-
- memcpy(out, sctx, sizeof(*sctx));
-
- return 0;
-}
-
-static int sha1_ssse3_import(struct shash_desc *desc, const void *in)
-{
- struct sha1_state *sctx = shash_desc_ctx(desc);
-
- memcpy(sctx, in, sizeof(*sctx));
-
- return 0;
-}
-
-static struct shash_alg alg = {
- .digestsize = SHA1_DIGEST_SIZE,
- .init = sha1_ssse3_init,
- .update = sha1_ssse3_update,
- .final = sha1_ssse3_final,
- .export = sha1_ssse3_export,
- .import = sha1_ssse3_import,
- .descsize = sizeof(struct sha1_state),
- .statesize = sizeof(struct sha1_state),
- .base = {
- .cra_name = "sha1",
- .cra_driver_name= "sha1-ssse3",
- .cra_priority = 150,
- .cra_flags = CRYPTO_ALG_TYPE_SHASH,
- .cra_blocksize = SHA1_BLOCK_SIZE,
- .cra_module = THIS_MODULE,
- }
-};
-
-#ifdef SHA1_ENABLE_AVX_SUPPORT
-static bool __init avx_usable(void)
-{
- u64 xcr0;
-
- if (!cpu_has_avx || !cpu_has_osxsave)
- return false;
-
- xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
- if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) {
- pr_info("AVX detected but unusable.\n");
-
- return false;
- }
-
- return true;
-}
-#endif
-
-static int __init sha1_ssse3_mod_init(void)
-{
- /* test for SSSE3 first */
- if (cpu_has_ssse3)
- sha1_transform_asm = sha1_transform_ssse3;
-
-#ifdef SHA1_ENABLE_AVX_SUPPORT
- /* allow AVX to override SSSE3, it's a little faster */
- if (avx_usable())
- sha1_transform_asm = sha1_transform_avx;
-#endif
-
- if (sha1_transform_asm) {
- pr_info("Using %s optimized SHA-1 implementation\n",
- sha1_transform_asm == sha1_transform_ssse3 ? "SSSE3"
- : "AVX");
- return crypto_register_shash(&alg);
- }
- pr_info("Neither AVX nor SSSE3 is available/usable.\n");
-
- return -ENODEV;
-}
-
-static void __exit sha1_ssse3_mod_fini(void)
-{
- crypto_unregister_shash(&alg);
-}
-
-module_init(sha1_ssse3_mod_init);
-module_exit(sha1_ssse3_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, Supplemental SSE3 accelerated");
-
-MODULE_ALIAS("sha1");
generated by cgit (git 2.34.1) at 2025-01-11 04:57:28 +0000