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-rw-r--r--crypto/blkcipher.c67
-rw-r--r--include/crypto/algapi.h5
2 files changed, 37 insertions, 35 deletions
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index a79e7e9..46fdab5 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -70,14 +70,12 @@ static inline u8 *blkcipher_get_spot(u8 *start, unsigned int len)
return max(start, end_page);
}
-static inline unsigned int blkcipher_done_slow(struct crypto_blkcipher *tfm,
- struct blkcipher_walk *walk,
+static inline unsigned int blkcipher_done_slow(struct blkcipher_walk *walk,
unsigned int bsize)
{
u8 *addr;
- unsigned int alignmask = crypto_blkcipher_alignmask(tfm);
- addr = (u8 *)ALIGN((unsigned long)walk->buffer, alignmask + 1);
+ addr = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1);
addr = blkcipher_get_spot(addr, bsize);
scatterwalk_copychunks(addr, &walk->out, bsize, 1);
return bsize;
@@ -105,7 +103,6 @@ static inline unsigned int blkcipher_done_fast(struct blkcipher_walk *walk,
int blkcipher_walk_done(struct blkcipher_desc *desc,
struct blkcipher_walk *walk, int err)
{
- struct crypto_blkcipher *tfm = desc->tfm;
unsigned int nbytes = 0;
if (likely(err >= 0)) {
@@ -117,7 +114,7 @@ int blkcipher_walk_done(struct blkcipher_desc *desc,
err = -EINVAL;
goto err;
} else
- n = blkcipher_done_slow(tfm, walk, n);
+ n = blkcipher_done_slow(walk, n);
nbytes = walk->total - n;
err = 0;
@@ -136,7 +133,7 @@ err:
}
if (walk->iv != desc->info)
- memcpy(desc->info, walk->iv, crypto_blkcipher_ivsize(tfm));
+ memcpy(desc->info, walk->iv, walk->ivsize);
if (walk->buffer != walk->page)
kfree(walk->buffer);
if (walk->page)
@@ -226,22 +223,20 @@ static inline int blkcipher_next_fast(struct blkcipher_desc *desc,
static int blkcipher_walk_next(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
- struct crypto_blkcipher *tfm = desc->tfm;
- unsigned int alignmask = crypto_blkcipher_alignmask(tfm);
unsigned int bsize;
unsigned int n;
int err;
n = walk->total;
- if (unlikely(n < crypto_blkcipher_blocksize(tfm))) {
+ if (unlikely(n < walk->cipher_blocksize)) {
desc->flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN;
return blkcipher_walk_done(desc, walk, -EINVAL);
}
walk->flags &= ~(BLKCIPHER_WALK_SLOW | BLKCIPHER_WALK_COPY |
BLKCIPHER_WALK_DIFF);
- if (!scatterwalk_aligned(&walk->in, alignmask) ||
- !scatterwalk_aligned(&walk->out, alignmask)) {
+ if (!scatterwalk_aligned(&walk->in, walk->alignmask) ||
+ !scatterwalk_aligned(&walk->out, walk->alignmask)) {
walk->flags |= BLKCIPHER_WALK_COPY;
if (!walk->page) {
walk->page = (void *)__get_free_page(GFP_ATOMIC);
@@ -250,12 +245,12 @@ static int blkcipher_walk_next(struct blkcipher_desc *desc,
}
}
- bsize = min(walk->blocksize, n);
+ bsize = min(walk->walk_blocksize, n);
n = scatterwalk_clamp(&walk->in, n);
n = scatterwalk_clamp(&walk->out, n);
if (unlikely(n < bsize)) {
- err = blkcipher_next_slow(desc, walk, bsize, alignmask);
+ err = blkcipher_next_slow(desc, walk, bsize, walk->alignmask);
goto set_phys_lowmem;
}
@@ -277,28 +272,26 @@ set_phys_lowmem:
return err;
}
-static inline int blkcipher_copy_iv(struct blkcipher_walk *walk,
- struct crypto_blkcipher *tfm,
- unsigned int alignmask)
+static inline int blkcipher_copy_iv(struct blkcipher_walk *walk)
{
- unsigned bs = walk->blocksize;
- unsigned int ivsize = crypto_blkcipher_ivsize(tfm);
- unsigned aligned_bs = ALIGN(bs, alignmask + 1);
- unsigned int size = aligned_bs * 2 + ivsize + max(aligned_bs, ivsize) -
- (alignmask + 1);
+ unsigned bs = walk->walk_blocksize;
+ unsigned aligned_bs = ALIGN(bs, walk->alignmask + 1);
+ unsigned int size = aligned_bs * 2 +
+ walk->ivsize + max(aligned_bs, walk->ivsize) -
+ (walk->alignmask + 1);
u8 *iv;
- size += alignmask & ~(crypto_tfm_ctx_alignment() - 1);
+ size += walk->alignmask & ~(crypto_tfm_ctx_alignment() - 1);
walk->buffer = kmalloc(size, GFP_ATOMIC);
if (!walk->buffer)
return -ENOMEM;
- iv = (u8 *)ALIGN((unsigned long)walk->buffer, alignmask + 1);
+ iv = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1);
iv = blkcipher_get_spot(iv, bs) + aligned_bs;
iv = blkcipher_get_spot(iv, bs) + aligned_bs;
- iv = blkcipher_get_spot(iv, ivsize);
+ iv = blkcipher_get_spot(iv, walk->ivsize);
- walk->iv = memcpy(iv, walk->iv, ivsize);
+ walk->iv = memcpy(iv, walk->iv, walk->ivsize);
return 0;
}
@@ -306,7 +299,10 @@ int blkcipher_walk_virt(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
walk->flags &= ~BLKCIPHER_WALK_PHYS;
- walk->blocksize = crypto_blkcipher_blocksize(desc->tfm);
+ walk->walk_blocksize = crypto_blkcipher_blocksize(desc->tfm);
+ walk->cipher_blocksize = walk->walk_blocksize;
+ walk->ivsize = crypto_blkcipher_ivsize(desc->tfm);
+ walk->alignmask = crypto_blkcipher_alignmask(desc->tfm);
return blkcipher_walk_first(desc, walk);
}
EXPORT_SYMBOL_GPL(blkcipher_walk_virt);
@@ -315,7 +311,10 @@ int blkcipher_walk_phys(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
walk->flags |= BLKCIPHER_WALK_PHYS;
- walk->blocksize = crypto_blkcipher_blocksize(desc->tfm);
+ walk->walk_blocksize = crypto_blkcipher_blocksize(desc->tfm);
+ walk->cipher_blocksize = walk->walk_blocksize;
+ walk->ivsize = crypto_blkcipher_ivsize(desc->tfm);
+ walk->alignmask = crypto_blkcipher_alignmask(desc->tfm);
return blkcipher_walk_first(desc, walk);
}
EXPORT_SYMBOL_GPL(blkcipher_walk_phys);
@@ -323,9 +322,6 @@ EXPORT_SYMBOL_GPL(blkcipher_walk_phys);
static int blkcipher_walk_first(struct blkcipher_desc *desc,
struct blkcipher_walk *walk)
{
- struct crypto_blkcipher *tfm = desc->tfm;
- unsigned int alignmask = crypto_blkcipher_alignmask(tfm);
-
if (WARN_ON_ONCE(in_irq()))
return -EDEADLK;
@@ -335,8 +331,8 @@ static int blkcipher_walk_first(struct blkcipher_desc *desc,
walk->buffer = NULL;
walk->iv = desc->info;
- if (unlikely(((unsigned long)walk->iv & alignmask))) {
- int err = blkcipher_copy_iv(walk, tfm, alignmask);
+ if (unlikely(((unsigned long)walk->iv & walk->alignmask))) {
+ int err = blkcipher_copy_iv(walk);
if (err)
return err;
}
@@ -353,7 +349,10 @@ int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
unsigned int blocksize)
{
walk->flags &= ~BLKCIPHER_WALK_PHYS;
- walk->blocksize = blocksize;
+ walk->walk_blocksize = blocksize;
+ walk->cipher_blocksize = crypto_blkcipher_blocksize(desc->tfm);
+ walk->ivsize = crypto_blkcipher_ivsize(desc->tfm);
+ walk->alignmask = crypto_blkcipher_alignmask(desc->tfm);
return blkcipher_walk_first(desc, walk);
}
EXPORT_SYMBOL_GPL(blkcipher_walk_virt_block);
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index e73c19e..d9d14a0 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -100,9 +100,12 @@ struct blkcipher_walk {
void *page;
u8 *buffer;
u8 *iv;
+ unsigned int ivsize;
int flags;
- unsigned int blocksize;
+ unsigned int walk_blocksize;
+ unsigned int cipher_blocksize;
+ unsigned int alignmask;
};
struct ablkcipher_walk {
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