diff options
Diffstat (limited to 'arch/x86/crypto/fpu.c')
| -rw-r--r-- | arch/x86/crypto/fpu.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/arch/x86/crypto/fpu.c b/arch/x86/crypto/fpu.c deleted file mode 100644 index 406680476c52..000000000000 --- a/arch/x86/crypto/fpu.c +++ /dev/null @@ -1,207 +0,0 @@ -/* - * FPU: Wrapper for blkcipher touching fpu - * - * Copyright (c) Intel Corp. - * Author: Huang Ying <ying.huang@intel.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. - * - */ - -#include <crypto/internal/skcipher.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <asm/fpu/api.h> - -struct crypto_fpu_ctx { - struct crypto_skcipher *child; -}; - -static int crypto_fpu_setkey(struct crypto_skcipher *parent, const u8 *key, - unsigned int keylen) -{ - struct crypto_fpu_ctx *ctx = crypto_skcipher_ctx(parent); - struct crypto_skcipher *child = ctx->child; - int err; - - crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); - crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) & - CRYPTO_TFM_REQ_MASK); - err = crypto_skcipher_setkey(child, key, keylen); - crypto_skcipher_set_flags(parent, crypto_skcipher_get_flags(child) & - CRYPTO_TFM_RES_MASK); - return err; -} - -static int crypto_fpu_encrypt(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct crypto_fpu_ctx *ctx = crypto_skcipher_ctx(tfm); - struct crypto_skcipher *child = ctx->child; - SKCIPHER_REQUEST_ON_STACK(subreq, child); - int err; - - skcipher_request_set_tfm(subreq, child); - skcipher_request_set_callback(subreq, 0, NULL, NULL); - skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, - req->iv); - - kernel_fpu_begin(); - err = crypto_skcipher_encrypt(subreq); - kernel_fpu_end(); - - skcipher_request_zero(subreq); - return err; -} - -static int crypto_fpu_decrypt(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - struct crypto_fpu_ctx *ctx = crypto_skcipher_ctx(tfm); - struct crypto_skcipher *child = ctx->child; - SKCIPHER_REQUEST_ON_STACK(subreq, child); - int err; - - skcipher_request_set_tfm(subreq, child); - skcipher_request_set_callback(subreq, 0, NULL, NULL); - skcipher_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, - req->iv); - - kernel_fpu_begin(); - err = crypto_skcipher_decrypt(subreq); - kernel_fpu_end(); - - skcipher_request_zero(subreq); - return err; -} - -static int crypto_fpu_init_tfm(struct crypto_skcipher *tfm) -{ - struct skcipher_instance *inst = skcipher_alg_instance(tfm); - struct crypto_fpu_ctx *ctx = crypto_skcipher_ctx(tfm); - struct crypto_skcipher_spawn *spawn; - struct crypto_skcipher *cipher; - - spawn = skcipher_instance_ctx(inst); - cipher = crypto_spawn_skcipher(spawn); - if (IS_ERR(cipher)) - return PTR_ERR(cipher); - - ctx->child = cipher; - - return 0; -} - -static void crypto_fpu_exit_tfm(struct crypto_skcipher *tfm) -{ - struct crypto_fpu_ctx *ctx = crypto_skcipher_ctx(tfm); - - crypto_free_skcipher(ctx->child); -} - -static void crypto_fpu_free(struct skcipher_instance *inst) -{ - crypto_drop_skcipher(skcipher_instance_ctx(inst)); - kfree(inst); -} - -static int crypto_fpu_create(struct crypto_template *tmpl, struct rtattr **tb) -{ - struct crypto_skcipher_spawn *spawn; - struct skcipher_instance *inst; - struct crypto_attr_type *algt; - struct skcipher_alg *alg; - const char *cipher_name; - int err; - - algt = crypto_get_attr_type(tb); - if (IS_ERR(algt)) - return PTR_ERR(algt); - - if ((algt->type ^ (CRYPTO_ALG_INTERNAL | CRYPTO_ALG_TYPE_SKCIPHER)) & - algt->mask) - return -EINVAL; - - if (!(algt->mask & CRYPTO_ALG_INTERNAL)) - return -EINVAL; - - cipher_name = crypto_attr_alg_name(tb[1]); - if (IS_ERR(cipher_name)) - return PTR_ERR(cipher_name); - - inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); - if (!inst) - return -ENOMEM; - - spawn = skcipher_instance_ctx(inst); - - crypto_set_skcipher_spawn(spawn, skcipher_crypto_instance(inst)); - err = crypto_grab_skcipher(spawn, cipher_name, CRYPTO_ALG_INTERNAL, - CRYPTO_ALG_INTERNAL | CRYPTO_ALG_ASYNC); - if (err) - goto out_free_inst; - - alg = crypto_skcipher_spawn_alg(spawn); - - err = crypto_inst_setname(skcipher_crypto_instance(inst), "fpu", - &alg->base); - if (err) - goto out_drop_skcipher; - - inst->alg.base.cra_flags = CRYPTO_ALG_INTERNAL; - inst->alg.base.cra_priority = alg->base.cra_priority; - inst->alg.base.cra_blocksize = alg->base.cra_blocksize; - inst->alg.base.cra_alignmask = alg->base.cra_alignmask; - - inst->alg.ivsize = crypto_skcipher_alg_ivsize(alg); - inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg); - inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg); - - inst->alg.base.cra_ctxsize = sizeof(struct crypto_fpu_ctx); - - inst->alg.init = crypto_fpu_init_tfm; - inst->alg.exit = crypto_fpu_exit_tfm; - - inst->alg.setkey = crypto_fpu_setkey; - inst->alg.encrypt = crypto_fpu_encrypt; - inst->alg.decrypt = crypto_fpu_decrypt; - - inst->free = crypto_fpu_free; - - err = skcipher_register_instance(tmpl, inst); - if (err) - goto out_drop_skcipher; - -out: - return err; - -out_drop_skcipher: - crypto_drop_skcipher(spawn); -out_free_inst: - kfree(inst); - goto out; -} - -static struct crypto_template crypto_fpu_tmpl = { - .name = "fpu", - .create = crypto_fpu_create, - .module = THIS_MODULE, -}; - -int __init crypto_fpu_init(void) -{ - return crypto_register_template(&crypto_fpu_tmpl); -} - -void crypto_fpu_exit(void) -{ - crypto_unregister_template(&crypto_fpu_tmpl); -} - -MODULE_ALIAS_CRYPTO("fpu"); |