iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

crypto: x86/glue_helper - remove blkcipher_walk functions

Browse Source 
Now that all glue_helper users have been switched from the blkcipher
interface over to the skcipher interface, remove the versions of the
glue_helper functions that handled the blkcipher interface.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2018-02-19 23:48:26 -08:00 committed by Herbert Xu
parent 217afccf65
commit 0d87d0f425
2 changed files with 0 additions and 406 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

344
arch/x86/crypto/glue_helper.c
View File

@ -32,63 +32,6 @@
#include <crypto/xts.h> #include <crypto/xts.h>
#include <asm/crypto/glue_helper.h> #include <asm/crypto/glue_helper.h>
static int __glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
void *ctx = crypto_blkcipher_ctx(desc->tfm);
const unsigned int bsize = 128 / 8;
unsigned int nbytes, i, func_bytes;
bool fpu_enabled = false;
int err;
err = blkcipher_walk_virt(desc, walk);
while ((nbytes = walk->nbytes)) {
u8 *wsrc = walk->src.virt.addr;
u8 *wdst = walk->dst.virt.addr;
fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
desc, fpu_enabled, nbytes);
for (i = 0; i < gctx->num_funcs; i++) {
func_bytes = bsize * gctx->funcs[i].num_blocks;
/* Process multi-block batch */
if (nbytes >= func_bytes) {
do {
gctx->funcs[i].fn_u.ecb(ctx, wdst,
wsrc);
wsrc += func_bytes;
wdst += func_bytes;
nbytes -= func_bytes;
} while (nbytes >= func_bytes);
if (nbytes < bsize)
goto done;
}
}
done:
err = blkcipher_walk_done(desc, walk, nbytes);
}
glue_fpu_end(fpu_enabled);
return err;
}
int glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct blkcipher_walk walk;
blkcipher_walk_init(&walk, dst, src, nbytes);
return __glue_ecb_crypt_128bit(gctx, desc, &walk);
}
EXPORT_SYMBOL_GPL(glue_ecb_crypt_128bit);
int glue_ecb_req_128bit(const struct common_glue_ctx *gctx, int glue_ecb_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req) struct skcipher_request *req)
{ {
@ -135,51 +78,6 @@ int glue_ecb_req_128bit(const struct common_glue_ctx *gctx,
} }
EXPORT_SYMBOL_GPL(glue_ecb_req_128bit); EXPORT_SYMBOL_GPL(glue_ecb_req_128bit);
static unsigned int __glue_cbc_encrypt_128bit(const common_glue_func_t fn,
struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
void *ctx = crypto_blkcipher_ctx(desc->tfm);
const unsigned int bsize = 128 / 8;
unsigned int nbytes = walk->nbytes;
u128 *src = (u128 *)walk->src.virt.addr;
u128 *dst = (u128 *)walk->dst.virt.addr;
u128 *iv = (u128 *)walk->iv;
do {
u128_xor(dst, src, iv);
fn(ctx, (u8 *)dst, (u8 *)dst);
iv = dst;
src += 1;
dst += 1;
nbytes -= bsize;
} while (nbytes >= bsize);
*(u128 *)walk->iv = *iv;
return nbytes;
}
int glue_cbc_encrypt_128bit(const common_glue_func_t fn,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
while ((nbytes = walk.nbytes)) {
nbytes = __glue_cbc_encrypt_128bit(fn, desc, &walk);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
return err;
}
EXPORT_SYMBOL_GPL(glue_cbc_encrypt_128bit);
int glue_cbc_encrypt_req_128bit(const common_glue_func_t fn, int glue_cbc_encrypt_req_128bit(const common_glue_func_t fn,
struct skcipher_request *req) struct skcipher_request *req)
{ {
@ -212,82 +110,6 @@ int glue_cbc_encrypt_req_128bit(const common_glue_func_t fn,
} }
EXPORT_SYMBOL_GPL(glue_cbc_encrypt_req_128bit); EXPORT_SYMBOL_GPL(glue_cbc_encrypt_req_128bit);
static unsigned int
__glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
void *ctx = crypto_blkcipher_ctx(desc->tfm);
const unsigned int bsize = 128 / 8;
unsigned int nbytes = walk->nbytes;
u128 *src = (u128 *)walk->src.virt.addr;
u128 *dst = (u128 *)walk->dst.virt.addr;
u128 last_iv;
unsigned int num_blocks, func_bytes;
unsigned int i;
/* Start of the last block. */
src += nbytes / bsize - 1;
dst += nbytes / bsize - 1;
last_iv = *src;
for (i = 0; i < gctx->num_funcs; i++) {
num_blocks = gctx->funcs[i].num_blocks;
func_bytes = bsize * num_blocks;
/* Process multi-block batch */
if (nbytes >= func_bytes) {
do {
nbytes -= func_bytes - bsize;
src -= num_blocks - 1;
dst -= num_blocks - 1;
gctx->funcs[i].fn_u.cbc(ctx, dst, src);
nbytes -= bsize;
if (nbytes < bsize)
goto done;
u128_xor(dst, dst, src - 1);
src -= 1;
dst -= 1;
} while (nbytes >= func_bytes);
}
}
done:
u128_xor(dst, dst, (u128 *)walk->iv);
*(u128 *)walk->iv = last_iv;
return nbytes;
}
int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
const unsigned int bsize = 128 / 8;
bool fpu_enabled = false;
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
while ((nbytes = walk.nbytes)) {
fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
desc, fpu_enabled, nbytes);
nbytes = __glue_cbc_decrypt_128bit(gctx, desc, &walk);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
glue_fpu_end(fpu_enabled);
return err;
}
EXPORT_SYMBOL_GPL(glue_cbc_decrypt_128bit);
int glue_cbc_decrypt_req_128bit(const struct common_glue_ctx *gctx, int glue_cbc_decrypt_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req) struct skcipher_request *req)
{ {
@ -349,96 +171,6 @@ done:
} }
EXPORT_SYMBOL_GPL(glue_cbc_decrypt_req_128bit); EXPORT_SYMBOL_GPL(glue_cbc_decrypt_req_128bit);
static void glue_ctr_crypt_final_128bit(const common_glue_ctr_func_t fn_ctr,
struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
void *ctx = crypto_blkcipher_ctx(desc->tfm);
u8 *src = (u8 *)walk->src.virt.addr;
u8 *dst = (u8 *)walk->dst.virt.addr;
unsigned int nbytes = walk->nbytes;
le128 ctrblk;
u128 tmp;
be128_to_le128(&ctrblk, (be128 *)walk->iv);
memcpy(&tmp, src, nbytes);
fn_ctr(ctx, &tmp, &tmp, &ctrblk);
memcpy(dst, &tmp, nbytes);
le128_to_be128((be128 *)walk->iv, &ctrblk);
}
static unsigned int __glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
const unsigned int bsize = 128 / 8;
void *ctx = crypto_blkcipher_ctx(desc->tfm);
unsigned int nbytes = walk->nbytes;
u128 *src = (u128 *)walk->src.virt.addr;
u128 *dst = (u128 *)walk->dst.virt.addr;
le128 ctrblk;
unsigned int num_blocks, func_bytes;
unsigned int i;
be128_to_le128(&ctrblk, (be128 *)walk->iv);
/* Process multi-block batch */
for (i = 0; i < gctx->num_funcs; i++) {
num_blocks = gctx->funcs[i].num_blocks;
func_bytes = bsize * num_blocks;
if (nbytes >= func_bytes) {
do {
gctx->funcs[i].fn_u.ctr(ctx, dst, src, &ctrblk);
src += num_blocks;
dst += num_blocks;
nbytes -= func_bytes;
} while (nbytes >= func_bytes);
if (nbytes < bsize)
goto done;
}
}
done:
le128_to_be128((be128 *)walk->iv, &ctrblk);
return nbytes;
}
int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes)
{
const unsigned int bsize = 128 / 8;
bool fpu_enabled = false;
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt_block(desc, &walk, bsize);
while ((nbytes = walk.nbytes) >= bsize) {
fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
desc, fpu_enabled, nbytes);
nbytes = __glue_ctr_crypt_128bit(gctx, desc, &walk);
err = blkcipher_walk_done(desc, &walk, nbytes);
}
glue_fpu_end(fpu_enabled);
if (walk.nbytes) {
glue_ctr_crypt_final_128bit(
gctx->funcs[gctx->num_funcs - 1].fn_u.ctr, desc, &walk);
err = blkcipher_walk_done(desc, &walk, 0);
}
return err;
}
EXPORT_SYMBOL_GPL(glue_ctr_crypt_128bit);
int glue_ctr_req_128bit(const struct common_glue_ctx *gctx, int glue_ctr_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req) struct skcipher_request *req)
{ {
@ -507,42 +239,6 @@ int glue_ctr_req_128bit(const struct common_glue_ctx *gctx,
} }
EXPORT_SYMBOL_GPL(glue_ctr_req_128bit); EXPORT_SYMBOL_GPL(glue_ctr_req_128bit);
static unsigned int __glue_xts_crypt_128bit(const struct common_glue_ctx *gctx,
void *ctx,
struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
const unsigned int bsize = 128 / 8;
unsigned int nbytes = walk->nbytes;
u128 *src = (u128 *)walk->src.virt.addr;
u128 *dst = (u128 *)walk->dst.virt.addr;
unsigned int num_blocks, func_bytes;
unsigned int i;
/* Process multi-block batch */
for (i = 0; i < gctx->num_funcs; i++) {
num_blocks = gctx->funcs[i].num_blocks;
func_bytes = bsize * num_blocks;
if (nbytes >= func_bytes) {
do {
gctx->funcs[i].fn_u.xts(ctx, dst, src,
(le128 *)walk->iv);
src += num_blocks;
dst += num_blocks;
nbytes -= func_bytes;
} while (nbytes >= func_bytes);
if (nbytes < bsize)
goto done;
}
}
done:
return nbytes;
}
static unsigned int __glue_xts_req_128bit(const struct common_glue_ctx *gctx, static unsigned int __glue_xts_req_128bit(const struct common_glue_ctx *gctx,
void *ctx, void *ctx,
struct skcipher_walk *walk) struct skcipher_walk *walk)
@ -578,46 +274,6 @@ done:
return nbytes; return nbytes;
} }
/* for implementations implementing faster XTS IV generator */
int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc, struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes,
void (*tweak_fn)(void *ctx, u8 *dst, const u8 *src),
void *tweak_ctx, void *crypt_ctx)
{
const unsigned int bsize = 128 / 8;
bool fpu_enabled = false;
struct blkcipher_walk walk;
int err;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
nbytes = walk.nbytes;
if (!nbytes)
return err;
/* set minimum length to bsize, for tweak_fn */
fpu_enabled = glue_fpu_begin(bsize, gctx->fpu_blocks_limit,
desc, fpu_enabled,
nbytes < bsize ? bsize : nbytes);
/* calculate first value of T */
tweak_fn(tweak_ctx, walk.iv, walk.iv);
while (nbytes) {
nbytes = __glue_xts_crypt_128bit(gctx, crypt_ctx, desc, &walk);
err = blkcipher_walk_done(desc, &walk, nbytes);
nbytes = walk.nbytes;
}
glue_fpu_end(fpu_enabled);
return err;
}
EXPORT_SYMBOL_GPL(glue_xts_crypt_128bit);
int glue_xts_req_128bit(const struct common_glue_ctx *gctx, int glue_xts_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req, struct skcipher_request *req,
common_glue_func_t tweak_fn, void *tweak_ctx, common_glue_func_t tweak_fn, void *tweak_ctx,

62
arch/x86/include/asm/crypto/glue_helper.h
View File

@ -44,32 +44,6 @@ struct common_glue_ctx {
struct common_glue_func_entry funcs[]; struct common_glue_func_entry funcs[];
}; };
static inline bool glue_fpu_begin(unsigned int bsize, int fpu_blocks_limit,
struct blkcipher_desc *desc,
bool fpu_enabled, unsigned int nbytes)
{
if (likely(fpu_blocks_limit < 0))
return false;
if (fpu_enabled)
return true;
/*
* Vector-registers are only used when chunk to be processed is large
* enough, so do not enable FPU until it is necessary.
*/
if (nbytes < bsize * (unsigned int)fpu_blocks_limit)
return false;
if (desc) {
/* prevent sleeping if FPU is in use */
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
}
kernel_fpu_begin();
return true;
}
static inline bool glue_skwalk_fpu_begin(unsigned int bsize, static inline bool glue_skwalk_fpu_begin(unsigned int bsize,
int fpu_blocks_limit, int fpu_blocks_limit,
struct skcipher_walk *walk, struct skcipher_walk *walk,
@ -126,54 +100,18 @@ static inline void le128_inc(le128 *i)
i->b = cpu_to_le64(b); i->b = cpu_to_le64(b);
} }
extern int glue_ecb_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes);
extern int glue_ecb_req_128bit(const struct common_glue_ctx *gctx, extern int glue_ecb_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req); struct skcipher_request *req);
extern int glue_cbc_encrypt_128bit(const common_glue_func_t fn,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src,
unsigned int nbytes);
extern int glue_cbc_encrypt_req_128bit(const common_glue_func_t fn, extern int glue_cbc_encrypt_req_128bit(const common_glue_func_t fn,
struct skcipher_request *req); struct skcipher_request *req);
extern int glue_cbc_decrypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src,
unsigned int nbytes);
extern int glue_cbc_decrypt_req_128bit(const struct common_glue_ctx *gctx, extern int glue_cbc_decrypt_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req); struct skcipher_request *req);
extern int glue_ctr_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes);
extern int glue_ctr_req_128bit(const struct common_glue_ctx *gctx, extern int glue_ctr_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req); struct skcipher_request *req);
extern int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes,
common_glue_func_t tweak_fn, void *tweak_ctx,
void *crypt_ctx);
extern int glue_xts_crypt_128bit(const struct common_glue_ctx *gctx,
struct blkcipher_desc *desc,
struct scatterlist *dst,
struct scatterlist *src, unsigned int nbytes,
common_glue_func_t tweak_fn, void *tweak_ctx,
void *crypt_ctx);
extern int glue_xts_req_128bit(const struct common_glue_ctx *gctx, extern int glue_xts_req_128bit(const struct common_glue_ctx *gctx,
struct skcipher_request *req, struct skcipher_request *req,
common_glue_func_t tweak_fn, void *tweak_ctx, common_glue_func_t tweak_fn, void *tweak_ctx,