diff options
Diffstat (limited to 'drivers/crypto/omap-sham.c')
| -rw-r--r-- | drivers/crypto/omap-sham.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index f788319f7ba7..cf9f617cfcd7 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -1143,9 +1143,20 @@ static int omap_sham_final_shash(struct ahash_request *req) { struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm); struct omap_sham_reqctx *ctx = ahash_request_ctx(req); + int offset = 0; + + /* + * If we are running HMAC on limited hardware support, skip + * the ipad in the beginning of the buffer if we are going for + * software fallback algorithm. + */ + if (test_bit(FLAGS_HMAC, &ctx->flags) && + !test_bit(FLAGS_AUTO_XOR, &ctx->dd->flags)) + offset = get_block_size(ctx); return omap_sham_shash_digest(tctx->fallback, req->base.flags, - ctx->buffer, ctx->bufcnt, req->result); + ctx->buffer + offset, + ctx->bufcnt - offset, req->result); } static int omap_sham_final(struct ahash_request *req) |