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crypto: mxs-dcp - Fix AES-CBC with hardware-bound keys

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Fix passing an initialization vector in the payload field which
is necessary for AES in CBC mode even with hardware-bound keys.

Fixes: 3d16af0b4c ("crypto: mxs-dcp: Add support for hardware-bound keys")
Signed-off-by: Tomas Paukrt <tomaspaukrt@email.cz>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tomas Paukrt 2024-09-13 11:11:43 +02:00 committed by Herbert Xu
parent f74032baac
commit 0dbb6854ca
1 changed files with 12 additions and 8 deletions
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20
drivers/crypto/mxs-dcp.c
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@ -225,21 +225,22 @@ static int mxs_dcp_start_dma(struct dcp_async_ctx *actx)
static int mxs_dcp_run_aes(struct dcp_async_ctx *actx,
struct skcipher_request *req, int init)
{
dma_addr_t key_phys = 0;
dma_addr_t src_phys, dst_phys;
dma_addr_t key_phys, src_phys, dst_phys;
struct dcp *sdcp = global_sdcp;
struct dcp_dma_desc *desc = &sdcp->coh->desc[actx->chan];
struct dcp_aes_req_ctx *rctx = skcipher_request_ctx(req);
bool key_referenced = actx->key_referenced;
int ret;
if (!key_referenced) {
if (key_referenced)
key_phys = dma_map_single(sdcp->dev, sdcp->coh->aes_key + AES_KEYSIZE_128,
AES_KEYSIZE_128, DMA_TO_DEVICE);
else
key_phys = dma_map_single(sdcp->dev, sdcp->coh->aes_key,
2 * AES_KEYSIZE_128, DMA_TO_DEVICE);
ret = dma_mapping_error(sdcp->dev, key_phys);
if (ret)
return ret;
}
ret = dma_mapping_error(sdcp->dev, key_phys);
if (ret)
return ret;
src_phys = dma_map_single(sdcp->dev, sdcp->coh->aes_in_buf,
DCP_BUF_SZ, DMA_TO_DEVICE);
@ -300,7 +301,10 @@ aes_done_run:
err_dst:
dma_unmap_single(sdcp->dev, src_phys, DCP_BUF_SZ, DMA_TO_DEVICE);
err_src:
if (!key_referenced)
if (key_referenced)
dma_unmap_single(sdcp->dev, key_phys, AES_KEYSIZE_128,
DMA_TO_DEVICE);
else
dma_unmap_single(sdcp->dev, key_phys, 2 * AES_KEYSIZE_128,
DMA_TO_DEVICE);
return ret;