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crypto: caam/qi - properly set IV after {en,de}crypt

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caam/qi needs a fix similar to what was done for caam/jr in
commit "crypto: caam/qi - properly set IV after {en,de}crypt",
to allow for ablkcipher/skcipher chunking/streaming.

Cc: <stable@vger.kernel.org>
Fixes: b189817cf7 ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Suggested-by: David Gstir <david@sigma-star.at>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2017-07-10 08:40:30 +03:00 committed by Herbert Xu
parent 1ed289f7b7
commit a68a193805
1 changed files with 8 additions and 1 deletions
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9
drivers/crypto/caam/caamalg_qi.c
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@ -776,9 +776,9 @@ static void ablkcipher_done(struct caam_drv_req *drv_req, u32 status)
struct crypto_ablkcipher *ablkcipher = crypto_ablkcipher_reqtfm(req);
struct caam_ctx *caam_ctx = crypto_ablkcipher_ctx(ablkcipher);
struct device *qidev = caam_ctx->qidev;
#ifdef DEBUG
int ivsize = crypto_ablkcipher_ivsize(ablkcipher);
#ifdef DEBUG
dev_err(qidev, "%s %d: status 0x%x\n", __func__, __LINE__, status);
#endif
@ -799,6 +799,13 @@ static void ablkcipher_done(struct caam_drv_req *drv_req, u32 status)
ablkcipher_unmap(qidev, edesc, req);
qi_cache_free(edesc);
/*
* The crypto API expects us to set the IV (req->info) to the last
* ciphertext block. This is used e.g. by the CTS mode.
*/
scatterwalk_map_and_copy(req->info, req->dst, req->nbytes - ivsize,
ivsize, 0);
ablkcipher_request_complete(req, status);
}