crypto: xcbc - Switch to shash
This patch converts the xcbc algorithm to the new shash type. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>wifi-calibration
Herbert Xu
parent
8bd1209cff
commit
3106caab61
219
crypto/xcbc.c
219
crypto/xcbc.c
|
|
@ -19,15 +19,9 @@
|
|||
* Kazunori Miyazawa <miyazawa@linux-ipv6.org>
|
||||
*/
|
||||
|
||||
#include <crypto/scatterwalk.h>
|
||||
#include <linux/crypto.h>
|
||||
#include <crypto/internal/hash.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/hardirq.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/rtnetlink.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/scatterlist.h>
|
||||
|
||||
static u_int32_t ks[12] = {0x01010101, 0x01010101, 0x01010101, 0x01010101,
|
||||
0x02020202, 0x02020202, 0x02020202, 0x02020202,
|
||||
|
|
@ -66,10 +60,10 @@ static void xor_128(u8 *a, const u8 *b, unsigned int bs)
|
|||
((u32 *)a)[3] ^= ((u32 *)b)[3];
|
||||
}
|
||||
|
||||
static int _crypto_xcbc_digest_setkey(struct crypto_hash *parent,
|
||||
static int _crypto_xcbc_digest_setkey(struct crypto_shash *parent,
|
||||
struct crypto_xcbc_ctx *ctx)
|
||||
{
|
||||
int bs = crypto_hash_blocksize(parent);
|
||||
int bs = crypto_shash_blocksize(parent);
|
||||
int err = 0;
|
||||
u8 key1[bs];
|
||||
|
||||
|
|
@ -81,10 +75,10 @@ static int _crypto_xcbc_digest_setkey(struct crypto_hash *parent,
|
|||
return crypto_cipher_setkey(ctx->child, key1, bs);
|
||||
}
|
||||
|
||||
static int crypto_xcbc_digest_setkey(struct crypto_hash *parent,
|
||||
static int crypto_xcbc_digest_setkey(struct crypto_shash *parent,
|
||||
const u8 *inkey, unsigned int keylen)
|
||||
{
|
||||
struct crypto_xcbc_ctx *ctx = crypto_hash_ctx_aligned(parent);
|
||||
struct crypto_xcbc_ctx *ctx = crypto_shash_ctx(parent);
|
||||
|
||||
if (keylen != crypto_cipher_blocksize(ctx->child))
|
||||
return -EINVAL;
|
||||
|
|
@ -96,10 +90,10 @@ static int crypto_xcbc_digest_setkey(struct crypto_hash *parent,
|
|||
return _crypto_xcbc_digest_setkey(parent, ctx);
|
||||
}
|
||||
|
||||
static int crypto_xcbc_digest_init(struct hash_desc *pdesc)
|
||||
static int crypto_xcbc_digest_init(struct shash_desc *pdesc)
|
||||
{
|
||||
struct crypto_xcbc_ctx *ctx = crypto_hash_ctx_aligned(pdesc->tfm);
|
||||
int bs = crypto_hash_blocksize(pdesc->tfm);
|
||||
struct crypto_xcbc_ctx *ctx = crypto_shash_ctx(pdesc->tfm);
|
||||
int bs = crypto_shash_blocksize(pdesc->tfm);
|
||||
|
||||
ctx->len = 0;
|
||||
memset(ctx->odds, 0, bs);
|
||||
|
|
@ -108,102 +102,55 @@ static int crypto_xcbc_digest_init(struct hash_desc *pdesc)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int crypto_xcbc_digest_update2(struct hash_desc *pdesc,
|
||||
struct scatterlist *sg,
|
||||
unsigned int nbytes)
|
||||
static int crypto_xcbc_digest_update(struct shash_desc *pdesc, const u8 *p,
|
||||
unsigned int len)
|
||||
{
|
||||
struct crypto_hash *parent = pdesc->tfm;
|
||||
struct crypto_xcbc_ctx *ctx = crypto_hash_ctx_aligned(parent);
|
||||
struct crypto_shash *parent = pdesc->tfm;
|
||||
struct crypto_xcbc_ctx *ctx = crypto_shash_ctx(parent);
|
||||
struct crypto_cipher *tfm = ctx->child;
|
||||
int bs = crypto_hash_blocksize(parent);
|
||||
int bs = crypto_shash_blocksize(parent);
|
||||
|
||||
for (;;) {
|
||||
struct page *pg = sg_page(sg);
|
||||
unsigned int offset = sg->offset;
|
||||
unsigned int slen = sg->length;
|
||||
/* checking the data can fill the block */
|
||||
if ((ctx->len + len) <= bs) {
|
||||
memcpy(ctx->odds + ctx->len, p, len);
|
||||
ctx->len += len;
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (unlikely(slen > nbytes))
|
||||
slen = nbytes;
|
||||
/* filling odds with new data and encrypting it */
|
||||
memcpy(ctx->odds + ctx->len, p, bs - ctx->len);
|
||||
len -= bs - ctx->len;
|
||||
p += bs - ctx->len;
|
||||
|
||||
nbytes -= slen;
|
||||
ctx->xor(ctx->prev, ctx->odds, bs);
|
||||
crypto_cipher_encrypt_one(tfm, ctx->prev, ctx->prev);
|
||||
|
||||
while (slen > 0) {
|
||||
unsigned int len = min(slen, ((unsigned int)(PAGE_SIZE)) - offset);
|
||||
char *p = crypto_kmap(pg, 0) + offset;
|
||||
/* clearing the length */
|
||||
ctx->len = 0;
|
||||
|
||||
/* checking the data can fill the block */
|
||||
if ((ctx->len + len) <= bs) {
|
||||
memcpy(ctx->odds + ctx->len, p, len);
|
||||
ctx->len += len;
|
||||
slen -= len;
|
||||
/* encrypting the rest of data */
|
||||
while (len > bs) {
|
||||
ctx->xor(ctx->prev, p, bs);
|
||||
crypto_cipher_encrypt_one(tfm, ctx->prev, ctx->prev);
|
||||
p += bs;
|
||||
len -= bs;
|
||||
}
|
||||
|
||||
/* checking the rest of the page */
|
||||
if (len + offset >= PAGE_SIZE) {
|
||||
offset = 0;
|
||||
pg++;
|
||||
} else
|
||||
offset += len;
|
||||
|
||||
crypto_kunmap(p, 0);
|
||||
crypto_yield(pdesc->flags);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* filling odds with new data and encrypting it */
|
||||
memcpy(ctx->odds + ctx->len, p, bs - ctx->len);
|
||||
len -= bs - ctx->len;
|
||||
p += bs - ctx->len;
|
||||
|
||||
ctx->xor(ctx->prev, ctx->odds, bs);
|
||||
crypto_cipher_encrypt_one(tfm, ctx->prev, ctx->prev);
|
||||
|
||||
/* clearing the length */
|
||||
ctx->len = 0;
|
||||
|
||||
/* encrypting the rest of data */
|
||||
while (len > bs) {
|
||||
ctx->xor(ctx->prev, p, bs);
|
||||
crypto_cipher_encrypt_one(tfm, ctx->prev,
|
||||
ctx->prev);
|
||||
p += bs;
|
||||
len -= bs;
|
||||
}
|
||||
|
||||
/* keeping the surplus of blocksize */
|
||||
if (len) {
|
||||
memcpy(ctx->odds, p, len);
|
||||
ctx->len = len;
|
||||
}
|
||||
crypto_kunmap(p, 0);
|
||||
crypto_yield(pdesc->flags);
|
||||
slen -= min(slen, ((unsigned int)(PAGE_SIZE)) - offset);
|
||||
offset = 0;
|
||||
pg++;
|
||||
}
|
||||
|
||||
if (!nbytes)
|
||||
break;
|
||||
sg = scatterwalk_sg_next(sg);
|
||||
/* keeping the surplus of blocksize */
|
||||
if (len) {
|
||||
memcpy(ctx->odds, p, len);
|
||||
ctx->len = len;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crypto_xcbc_digest_update(struct hash_desc *pdesc,
|
||||
struct scatterlist *sg,
|
||||
unsigned int nbytes)
|
||||
static int crypto_xcbc_digest_final(struct shash_desc *pdesc, u8 *out)
|
||||
{
|
||||
if (WARN_ON_ONCE(in_irq()))
|
||||
return -EDEADLK;
|
||||
return crypto_xcbc_digest_update2(pdesc, sg, nbytes);
|
||||
}
|
||||
|
||||
static int crypto_xcbc_digest_final(struct hash_desc *pdesc, u8 *out)
|
||||
{
|
||||
struct crypto_hash *parent = pdesc->tfm;
|
||||
struct crypto_xcbc_ctx *ctx = crypto_hash_ctx_aligned(parent);
|
||||
struct crypto_shash *parent = pdesc->tfm;
|
||||
struct crypto_xcbc_ctx *ctx = crypto_shash_ctx(parent);
|
||||
struct crypto_cipher *tfm = ctx->child;
|
||||
int bs = crypto_hash_blocksize(parent);
|
||||
int bs = crypto_shash_blocksize(parent);
|
||||
int err = 0;
|
||||
|
||||
if (ctx->len == bs) {
|
||||
|
|
@ -248,24 +195,13 @@ static int crypto_xcbc_digest_final(struct hash_desc *pdesc, u8 *out)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int crypto_xcbc_digest(struct hash_desc *pdesc,
|
||||
struct scatterlist *sg, unsigned int nbytes, u8 *out)
|
||||
{
|
||||
if (WARN_ON_ONCE(in_irq()))
|
||||
return -EDEADLK;
|
||||
|
||||
crypto_xcbc_digest_init(pdesc);
|
||||
crypto_xcbc_digest_update2(pdesc, sg, nbytes);
|
||||
return crypto_xcbc_digest_final(pdesc, out);
|
||||
}
|
||||
|
||||
static int xcbc_init_tfm(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct crypto_cipher *cipher;
|
||||
struct crypto_instance *inst = (void *)tfm->__crt_alg;
|
||||
struct crypto_spawn *spawn = crypto_instance_ctx(inst);
|
||||
struct crypto_xcbc_ctx *ctx = crypto_hash_ctx_aligned(__crypto_hash_cast(tfm));
|
||||
int bs = crypto_hash_blocksize(__crypto_hash_cast(tfm));
|
||||
struct crypto_xcbc_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
int bs = crypto_tfm_alg_blocksize(tfm);
|
||||
|
||||
cipher = crypto_spawn_cipher(spawn);
|
||||
if (IS_ERR(cipher))
|
||||
|
|
@ -289,70 +225,73 @@ static int xcbc_init_tfm(struct crypto_tfm *tfm)
|
|||
|
||||
static void xcbc_exit_tfm(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct crypto_xcbc_ctx *ctx = crypto_hash_ctx_aligned(__crypto_hash_cast(tfm));
|
||||
struct crypto_xcbc_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
crypto_free_cipher(ctx->child);
|
||||
}
|
||||
|
||||
static struct crypto_instance *xcbc_alloc(struct rtattr **tb)
|
||||
static int xcbc_create(struct crypto_template *tmpl, struct rtattr **tb)
|
||||
{
|
||||
struct crypto_instance *inst;
|
||||
struct shash_instance *inst;
|
||||
struct crypto_alg *alg;
|
||||
int err;
|
||||
|
||||
err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_HASH);
|
||||
err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH);
|
||||
if (err)
|
||||
return ERR_PTR(err);
|
||||
return err;
|
||||
|
||||
alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
|
||||
CRYPTO_ALG_TYPE_MASK);
|
||||
if (IS_ERR(alg))
|
||||
return ERR_CAST(alg);
|
||||
return PTR_ERR(alg);
|
||||
|
||||
switch(alg->cra_blocksize) {
|
||||
case 16:
|
||||
break;
|
||||
default:
|
||||
inst = ERR_PTR(-EINVAL);
|
||||
goto out_put_alg;
|
||||
}
|
||||
|
||||
inst = crypto_alloc_instance("xcbc", alg);
|
||||
inst = shash_alloc_instance("xcbc", alg);
|
||||
if (IS_ERR(inst))
|
||||
goto out_put_alg;
|
||||
|
||||
inst->alg.cra_flags = CRYPTO_ALG_TYPE_HASH;
|
||||
inst->alg.cra_priority = alg->cra_priority;
|
||||
inst->alg.cra_blocksize = alg->cra_blocksize;
|
||||
inst->alg.cra_alignmask = alg->cra_alignmask;
|
||||
inst->alg.cra_type = &crypto_hash_type;
|
||||
err = crypto_init_spawn(shash_instance_ctx(inst), alg,
|
||||
shash_crypto_instance(inst),
|
||||
CRYPTO_ALG_TYPE_MASK);
|
||||
if (err)
|
||||
goto out_free_inst;
|
||||
|
||||
inst->alg.cra_hash.digestsize = alg->cra_blocksize;
|
||||
inst->alg.cra_ctxsize = sizeof(struct crypto_xcbc_ctx) +
|
||||
ALIGN(inst->alg.cra_blocksize * 3, sizeof(void *));
|
||||
inst->alg.cra_init = xcbc_init_tfm;
|
||||
inst->alg.cra_exit = xcbc_exit_tfm;
|
||||
inst->alg.base.cra_priority = alg->cra_priority;
|
||||
inst->alg.base.cra_blocksize = alg->cra_blocksize;
|
||||
inst->alg.base.cra_alignmask = alg->cra_alignmask;
|
||||
|
||||
inst->alg.cra_hash.init = crypto_xcbc_digest_init;
|
||||
inst->alg.cra_hash.update = crypto_xcbc_digest_update;
|
||||
inst->alg.cra_hash.final = crypto_xcbc_digest_final;
|
||||
inst->alg.cra_hash.digest = crypto_xcbc_digest;
|
||||
inst->alg.cra_hash.setkey = crypto_xcbc_digest_setkey;
|
||||
inst->alg.digestsize = alg->cra_blocksize;
|
||||
inst->alg.base.cra_ctxsize = sizeof(struct crypto_xcbc_ctx) +
|
||||
ALIGN(alg->cra_blocksize * 3,
|
||||
sizeof(void *));
|
||||
inst->alg.base.cra_init = xcbc_init_tfm;
|
||||
inst->alg.base.cra_exit = xcbc_exit_tfm;
|
||||
|
||||
inst->alg.init = crypto_xcbc_digest_init;
|
||||
inst->alg.update = crypto_xcbc_digest_update;
|
||||
inst->alg.final = crypto_xcbc_digest_final;
|
||||
inst->alg.setkey = crypto_xcbc_digest_setkey;
|
||||
|
||||
err = shash_register_instance(tmpl, inst);
|
||||
if (err) {
|
||||
out_free_inst:
|
||||
shash_free_instance(shash_crypto_instance(inst));
|
||||
}
|
||||
|
||||
out_put_alg:
|
||||
crypto_mod_put(alg);
|
||||
return inst;
|
||||
}
|
||||
|
||||
static void xcbc_free(struct crypto_instance *inst)
|
||||
{
|
||||
crypto_drop_spawn(crypto_instance_ctx(inst));
|
||||
kfree(inst);
|
||||
return err;
|
||||
}
|
||||
|
||||
static struct crypto_template crypto_xcbc_tmpl = {
|
||||
.name = "xcbc",
|
||||
.alloc = xcbc_alloc,
|
||||
.free = xcbc_free,
|
||||
.create = xcbc_create,
|
||||
.free = shash_free_instance,
|
||||
.module = THIS_MODULE,
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue