Currently driver storred digest results in req->results
provided by the client. But some clients do not set it
until final() call. It leads to crash.
Changed to use internal buffer to store temporary digest results.
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>
---
drivers/crypto/omap-sham.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index a081c7c..2222370 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -97,6 +97,7 @@ struct omap_sham_reqctx {
unsigned long flags;
unsigned long op;
+ u8 digest[SHA1_DIGEST_SIZE];
size_t digcnt;
u8 *buffer;
size_t bufcnt;
@@ -194,7 +195,7 @@ static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit)
static void omap_sham_copy_hash(struct ahash_request *req, int out)
{
struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
- u32 *hash = (u32 *)req->result;
+ u32 *hash = (u32 *)ctx->digest;
int i;
if (likely(ctx->flags & FLAGS_SHA1)) {
@@ -453,8 +454,11 @@ static void omap_sham_cleanup(struct ahash_request *req)
ctx->flags |= FLAGS_CLEAN;
spin_unlock_irqrestore(&dd->lock, flags);
- if (ctx->digcnt)
+ if (ctx->digcnt) {
clk_disable(dd->iclk);
+ memcpy(req->result, ctx->digest, (ctx->flags & FLAGS_SHA1) ?
+ SHA1_DIGEST_SIZE : MD5_DIGEST_SIZE);
+ }
if (ctx->dma_addr)
dma_unmap_single(dd->dev, ctx->dma_addr, ctx->buflen,
@@ -576,6 +580,7 @@ static int omap_sham_final_req(struct omap_sham_dev *dd)
static int omap_sham_finish_req_hmac(struct ahash_request *req)
{
+ struct omap_sham_reqctx *ctx = ahash_request_ctx(req);
struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
struct omap_sham_hmac_ctx *bctx = tctx->base;
int bs = crypto_shash_blocksize(bctx->shash);
@@ -590,7 +595,7 @@ static int omap_sham_finish_req_hmac(struct ahash_request *req)
return crypto_shash_init(&desc.shash) ?:
crypto_shash_update(&desc.shash, bctx->opad, bs) ?:
- crypto_shash_finup(&desc.shash, req->result, ds, req->result);
+ crypto_shash_finup(&desc.shash, ctx->digest, ds, ctx->digest);
}
static void omap_sham_finish_req(struct ahash_request *req, int err)
--
1.7.0.4
--
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