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crypto: qat - Use memzero_explicit 

Use the new memzero_explicit function to cleanup sensitive data.

Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Struk, Tadeusz 2014-11-14 11:23:52 -08:00 committed by Herbert Xu
parent 52744af3af
commit aa408d6019
1 changed files with 22 additions and 14 deletions
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36
drivers/crypto/qat/qat_common/qat_algs.c
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@ -161,7 +161,7 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash,
__be64 *hash512_state_out;
int i, offset;
memset(auth_state.data, '\0', MAX_AUTH_STATE_SIZE + 64);
memzero_explicit(auth_state.data, MAX_AUTH_STATE_SIZE + 64);
shash->tfm = ctx->hash_tfm;
shash->flags = 0x0;
@ -174,13 +174,13 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash,
memcpy(ipad, buff, digest_size);
memcpy(opad, buff, digest_size);
memset(ipad + digest_size, 0, block_size - digest_size);
memset(opad + digest_size, 0, block_size - digest_size);
memzero_explicit(ipad + digest_size, block_size - digest_size);
memzero_explicit(opad + digest_size, block_size - digest_size);
} else {
memcpy(ipad, auth_key, auth_keylen);
memcpy(opad, auth_key, auth_keylen);
memset(ipad + auth_keylen, 0, block_size - auth_keylen);
memset(opad + auth_keylen, 0, block_size - auth_keylen);
memzero_explicit(ipad + auth_keylen, block_size - auth_keylen);
memzero_explicit(opad + auth_keylen, block_size - auth_keylen);
}
for (i = 0; i < block_size; i++) {
@ -254,6 +254,8 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash,
default:
return -EFAULT;
}
memzero_explicit(ipad, block_size);
memzero_explicit(opad, block_size);
return 0;
}
@ -492,12 +494,12 @@ static int qat_alg_setkey(struct crypto_aead *tfm, const uint8_t *key,
if (ctx->enc_cd) {
/* rekeying */
dev = &GET_DEV(ctx->inst->accel_dev);
memset(ctx->enc_cd, 0, sizeof(struct qat_alg_cd));
memset(ctx->dec_cd, 0, sizeof(struct qat_alg_cd));
memset(&ctx->enc_fw_req_tmpl, 0,
sizeof(struct icp_qat_fw_la_bulk_req));
memset(&ctx->dec_fw_req_tmpl, 0,
sizeof(struct icp_qat_fw_la_bulk_req));
memzero_explicit(ctx->enc_cd, sizeof(struct qat_alg_cd));
memzero_explicit(ctx->dec_cd, sizeof(struct qat_alg_cd));
memzero_explicit(&ctx->enc_fw_req_tmpl,
sizeof(struct icp_qat_fw_la_bulk_req));
memzero_explicit(&ctx->dec_fw_req_tmpl,
sizeof(struct icp_qat_fw_la_bulk_req));
} else {
/* new key */
int node = get_current_node();
@ -534,10 +536,12 @@ static int qat_alg_setkey(struct crypto_aead *tfm, const uint8_t *key,
return 0;
out_free_all:
memzero_explicit(ctx->dec_cd, sizeof(struct qat_alg_cd));
dma_free_coherent(dev, sizeof(struct qat_alg_cd),
ctx->dec_cd, ctx->dec_cd_paddr);
ctx->dec_cd = NULL;
out_free_enc:
memzero_explicit(ctx->enc_cd, sizeof(struct qat_alg_cd));
dma_free_coherent(dev, sizeof(struct qat_alg_cd),
ctx->enc_cd, ctx->enc_cd_paddr);
ctx->enc_cd = NULL;
@ -832,7 +836,7 @@ static int qat_alg_init(struct crypto_tfm *tfm,
{
struct qat_alg_session_ctx *ctx = crypto_tfm_ctx(tfm);
memset(ctx, '\0', sizeof(*ctx));
memzero_explicit(ctx, sizeof(*ctx));
ctx->hash_tfm = crypto_alloc_shash(hash_name, 0, 0);
if (IS_ERR(ctx->hash_tfm))
return -EFAULT;
@ -872,12 +876,16 @@ static void qat_alg_exit(struct crypto_tfm *tfm)
return;
dev = &GET_DEV(inst->accel_dev);
if (ctx->enc_cd)
if (ctx->enc_cd) {
memzero_explicit(ctx->enc_cd, sizeof(struct qat_alg_cd));
dma_free_coherent(dev, sizeof(struct qat_alg_cd),
ctx->enc_cd, ctx->enc_cd_paddr);
if (ctx->dec_cd)
}
if (ctx->dec_cd) {
memzero_explicit(ctx->dec_cd, sizeof(struct qat_alg_cd));
dma_free_coherent(dev, sizeof(struct qat_alg_cd),
ctx->dec_cd, ctx->dec_cd_paddr);
}
qat_crypto_put_instance(inst);
}