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authorDmitry Kasatkin <dmitry.kasatkin@nokia.com>2010-11-19 17:04:22 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2010-11-27 11:37:16 +0300
commit0c3cf4cc9abd854dcc6488719348a75b8f328c54 (patch)
tree3883a2763b471a05b39890715bb9bafa8e2410a9 /drivers/crypto
parent0d258efb6a58fe047197c3b9cff8746bb176d58a (diff)
downloadlinux-0c3cf4cc9abd854dcc6488719348a75b8f328c54.tar.xz
crypto: omap-sham - uses digest buffer in request context
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@nokia.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/omap-sham.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index a081c7c7d03f..222237014007 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)