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crypto: omap-aes - Fix CTR mode 

Algo self tests are failing for CTR mode with omap-aes driver,
giving the following error:

[  150.053644]       omap_aes_crypt: request size is not exact amount of AES blocks
[  150.061262] alg: skcipher: encryption failed on test 5 for ctr-aes-omap: ret=22

This is because the input length is not aligned with AES_BLOCK_SIZE.
Adding support for omap-aes driver for inputs with length not aligned
with AES_BLOCK_SIZE.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Vutla, Lokesh 2015-07-07 21:01:43 +05:30 committed by Herbert Xu
parent 2b93f7ee08
commit 310b0d55f0
1 changed files with 16 additions and 17 deletions
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33
drivers/crypto/omap-aes.c
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@ -558,6 +558,9 @@ static int omap_aes_check_aligned(struct scatterlist *sg, int total)
{
int len = 0;
if (!IS_ALIGNED(total, AES_BLOCK_SIZE))
return -EINVAL;
while (sg) {
if (!IS_ALIGNED(sg->offset, 4))
return -1;
@ -577,9 +580,10 @@ static int omap_aes_check_aligned(struct scatterlist *sg, int total)
static int omap_aes_copy_sgs(struct omap_aes_dev *dd)
{
void *buf_in, *buf_out;
int pages;
int pages, total;
pages = get_order(dd->total);
total = ALIGN(dd->total, AES_BLOCK_SIZE);
pages = get_order(total);
buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages);
buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages);
@ -594,11 +598,11 @@ static int omap_aes_copy_sgs(struct omap_aes_dev *dd)
sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0);
sg_init_table(&dd->in_sgl, 1);
sg_set_buf(&dd->in_sgl, buf_in, dd->total);
sg_set_buf(&dd->in_sgl, buf_in, total);
dd->in_sg = &dd->in_sgl;
sg_init_table(&dd->out_sgl, 1);
sg_set_buf(&dd->out_sgl, buf_out, dd->total);
sg_set_buf(&dd->out_sgl, buf_out, total);
dd->out_sg = &dd->out_sgl;
return 0;
@ -611,7 +615,7 @@ static int omap_aes_handle_queue(struct omap_aes_dev *dd,
struct omap_aes_ctx *ctx;
struct omap_aes_reqctx *rctx;
unsigned long flags;
int err, ret = 0;
int err, ret = 0, len;
spin_lock_irqsave(&dd->lock, flags);
if (req)
@ -650,8 +654,9 @@ static int omap_aes_handle_queue(struct omap_aes_dev *dd,
dd->sgs_copied = 0;
}
dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total);
dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total);
len = ALIGN(dd->total, AES_BLOCK_SIZE);
dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, len);
dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, len);
BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0);
rctx = ablkcipher_request_ctx(req);
@ -678,7 +683,7 @@ static void omap_aes_done_task(unsigned long data)
{
struct omap_aes_dev *dd = (struct omap_aes_dev *)data;
void *buf_in, *buf_out;
int pages;
int pages, len;
pr_debug("enter done_task\n");
@ -697,7 +702,8 @@ static void omap_aes_done_task(unsigned long data)
sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1);
pages = get_order(dd->total_save);
len = ALIGN(dd->total_save, AES_BLOCK_SIZE);
pages = get_order(len);
free_pages((unsigned long)buf_in, pages);
free_pages((unsigned long)buf_out, pages);
}
@ -726,11 +732,6 @@ static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
!!(mode & FLAGS_ENCRYPT),
!!(mode & FLAGS_CBC));
if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) {
pr_err("request size is not exact amount of AES blocks\n");
return -EINVAL;
}
dd = omap_aes_find_dev(ctx);
if (!dd)
return -ENODEV;
@ -1046,9 +1047,7 @@ static irqreturn_t omap_aes_irq(int irq, void *dev_id)
}
}
dd->total -= AES_BLOCK_SIZE;
BUG_ON(dd->total < 0);
dd->total -= min_t(size_t, AES_BLOCK_SIZE, dd->total);
/* Clear IRQ status */
status &= ~AES_REG_IRQ_DATA_OUT;