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crypto: ccp - Limit the amount of information exported

Selaa lähdekoodia 
Since the exported information can be exposed to user-space, instead of
exporting the entire request context only export the minimum information
needed.

Cc: <stable@vger.kernel.org> # 3.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tom Lendacky
2016-01-29 12:45:14 -06:00
committed by Herbert Xu
vanhempi 0529900a01
commit d1662165ae
3 muutettua tiedostoa jossa 48 lisäystä ja 10 poistoa
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16
drivers/crypto/ccp/ccp-crypto-aes-cmac.c
Näytä tiedosto

@@ -223,9 +223,12 @@ static int ccp_aes_cmac_digest(struct ahash_request *req)
static int ccp_aes_cmac_export(struct ahash_request *req, void *out)
{
struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req);
struct ccp_aes_cmac_req_ctx *state = out;
struct ccp_aes_cmac_exp_ctx *state = out;
*state = *rctx;
state->null_msg = rctx->null_msg;
memcpy(state->iv, rctx->iv, sizeof(state->iv));
state->buf_count = rctx->buf_count;
memcpy(state->buf, rctx->buf, sizeof(state->buf));
return 0;
}
@@ -233,9 +236,12 @@ static int ccp_aes_cmac_export(struct ahash_request *req, void *out)
static int ccp_aes_cmac_import(struct ahash_request *req, const void *in)
{
struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req);
const struct ccp_aes_cmac_req_ctx *state = in;
const struct ccp_aes_cmac_exp_ctx *state = in;
*rctx = *state;
rctx->null_msg = state->null_msg;
memcpy(rctx->iv, state->iv, sizeof(rctx->iv));
rctx->buf_count = state->buf_count;
memcpy(rctx->buf, state->buf, sizeof(rctx->buf));
return 0;
}
@@ -378,7 +384,7 @@ int ccp_register_aes_cmac_algs(struct list_head *head)
halg = &alg->halg;
halg->digestsize = AES_BLOCK_SIZE;
halg->statesize = sizeof(struct ccp_aes_cmac_req_ctx);
halg->statesize = sizeof(struct ccp_aes_cmac_exp_ctx);
base = &halg->base;
snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "cmac(aes)");