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crypto: talitos - SEC1 bugs on 0 data hash 

SEC1 bugs on 0 data hash, so we submit an already padded block representing 0 data

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
LEROY Christophe 2015-04-17 16:32:18 +02:00 committed by Herbert Xu
parent 6f65f6ac5f
commit 2d02905ebd
1 changed files with 24 additions and 0 deletions
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24
drivers/crypto/talitos.c
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@ -1797,6 +1797,27 @@ static void ahash_done(struct device *dev,
areq->base.complete(&areq->base, err);
}
/*
* SEC1 doesn't like hashing of 0 sized message, so we do the padding
* ourself and submit a padded block
*/
void talitos_handle_buggy_hash(struct talitos_ctx *ctx,
struct talitos_edesc *edesc,
struct talitos_ptr *ptr)
{
static u8 padded_hash[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
pr_err_once("Bug in SEC1, padding ourself\n");
edesc->desc.hdr &= ~DESC_HDR_MODE0_MDEU_PAD;
map_single_talitos_ptr(ctx->dev, ptr, sizeof(padded_hash),
(char *)padded_hash, DMA_TO_DEVICE);
}
static int common_nonsnoop_hash(struct talitos_edesc *edesc,
struct ahash_request *areq, unsigned int length,
void (*callback) (struct device *dev,
@ -1857,6 +1878,9 @@ static int common_nonsnoop_hash(struct talitos_edesc *edesc,
/* last DWORD empty */
desc->ptr[6] = zero_entry;
if (is_sec1 && from_talitos_ptr_len(&desc->ptr[3], true) == 0)
talitos_handle_buggy_hash(ctx, edesc, &desc->ptr[3]);
ret = talitos_submit(dev, ctx->ch, desc, callback, areq);
if (ret != -EINPROGRESS) {
common_nonsnoop_hash_unmap(dev, edesc, areq);