Release 4.14 arch/x86/crypto/fpu.c
/*
* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huang Ying | 78 | 89.66% | 1 | 50.00% |
| Herbert Xu | 9 | 10.34% | 1 | 50.00% |
| Total | 87 | 100.00% | 2 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 65 | 59.09% | 1 | 50.00% |
| Huang Ying | 45 | 40.91% | 1 | 50.00% |
| Total | 110 | 100.00% | 2 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 65 | 59.09% | 1 | 50.00% |
| Huang Ying | 45 | 40.91% | 1 | 50.00% |
| Total | 110 | 100.00% | 2 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huang Ying | 59 | 76.62% | 1 | 50.00% |
| Herbert Xu | 18 | 23.38% | 1 | 50.00% |
| Total | 77 | 100.00% | 2 | 100.00% |
static void crypto_fpu_exit_tfm(struct crypto_skcipher *tfm)
{
struct crypto_fpu_ctx *ctx = crypto_skcipher_ctx(tfm);
crypto_free_skcipher(ctx->child);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huang Ying | 25 | 89.29% | 1 | 50.00% |
| Herbert Xu | 3 | 10.71% | 1 | 50.00% |
| Total | 28 | 100.00% | 2 | 100.00% |
static void crypto_fpu_free(struct skcipher_instance *inst)
{
crypto_drop_skcipher(skcipher_instance_ctx(inst));
kfree(inst);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 21 | 87.50% | 1 | 50.00% |
| Huang Ying | 3 | 12.50% | 1 | 50.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Herbert Xu | 221 | 54.43% | 1 | 50.00% |
| Huang Ying | 185 | 45.57% | 1 | 50.00% |
| Total | 406 | 100.00% | 2 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huang Ying | 14 | 93.33% | 1 | 50.00% |
| Andrew Lutomirski | 1 | 6.67% | 1 | 50.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
void crypto_fpu_exit(void)
{
crypto_unregister_template(&crypto_fpu_tmpl);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huang Ying | 12 | 92.31% | 1 | 50.00% |
| Andrew Lutomirski | 1 | 7.69% | 1 | 50.00% |
| Total | 13 | 100.00% | 2 | 100.00% |
MODULE_ALIAS_CRYPTO("fpu");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Huang Ying | 512 | 55.11% | 1 | 16.67% |
| Herbert Xu | 406 | 43.70% | 1 | 16.67% |
| Kees Cook | 5 | 0.54% | 1 | 16.67% |
| Tejun Heo | 3 | 0.32% | 1 | 16.67% |
| Andrew Lutomirski | 2 | 0.22% | 1 | 16.67% |
| Ingo Molnar | 1 | 0.11% | 1 | 16.67% |
| Total | 929 | 100.00% | 6 | 100.00% |
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