This adds the functions blkcipher_walk_init_raw and blkcipher_walk_virt_raw,
which allow the caller to initialize the walk struct data members directly.
This allows non-blkcipher uses (e.g., AEADs) of the blkcipher walk API.
Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
---
crypto/blkcipher.c | 11 ++++++++++-
include/crypto/algapi.h | 20 ++++++++++++++++++++
2 files changed, 30 insertions(+), 1 deletion(-)
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 46fdab5e9cc7..a3ca85c29a76 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -349,7 +349,6 @@ int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
unsigned int blocksize)
{
walk->flags &= ~BLKCIPHER_WALK_PHYS;
- 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);
@@ -357,6 +356,16 @@ int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
}
EXPORT_SYMBOL_GPL(blkcipher_walk_virt_block);
+int blkcipher_walk_virt_raw(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk,
+ unsigned int blocksize)
+{
+ walk->flags &= ~BLKCIPHER_WALK_PHYS;
+ walk->walk_blocksize = blocksize;
+ return blkcipher_walk_first(desc, walk);
+}
+EXPORT_SYMBOL_GPL(blkcipher_walk_virt_raw);
+
static int setkey_unaligned(struct crypto_tfm *tfm, const u8 *key,
unsigned int keylen)
{
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index d9d14a0f0653..7e70ede66c02 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -195,6 +195,9 @@ int blkcipher_walk_phys(struct blkcipher_desc *desc,
int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
struct blkcipher_walk *walk,
unsigned int blocksize);
+int blkcipher_walk_virt_raw(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk,
+ unsigned int blocksize);
int ablkcipher_walk_done(struct ablkcipher_request *req,
struct ablkcipher_walk *walk, int err);
@@ -312,6 +315,23 @@ static inline void blkcipher_walk_init(struct
blkcipher_walk *walk,
walk->total = nbytes;
}
+static inline void blkcipher_walk_init_raw(struct blkcipher_walk *walk,
+ struct scatterlist *dst,
+ struct scatterlist *src,
+ unsigned int nbytes,
+ unsigned int blocksize,
+ unsigned int ivsize,
+ unsigned int alignmask)
+{
+ walk->in.sg = src;
+ walk->out.sg = dst;
+ walk->total = nbytes;
+
+ walk->cipher_blocksize = blocksize;
+ walk->ivsize = ivsize;
+ walk->alignmask = alignmask;
+}
+
static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
struct scatterlist *dst,
struct scatterlist *src,
--
1.8.3.2
--
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