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authorStruk, Tadeusz <tadeusz.struk@intel.com>2014-11-14 11:23:52 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2014-11-17 22:53:50 +0800
commitaa408d6019775c1b4362895df7929a043fa79804 (patch)
treeb5bddaa81f3326b4858dfc6448598fc841183251
parent52744af3af977ccbbf768be34650d7c75cfc1ad6 (diff)
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>
-rw-r--r--drivers/crypto/qat/qat_common/qat_algs.c36
1 files changed, 22 insertions, 14 deletions
diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c
index 25a409ca2d2a..31076eac0186 100644
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -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);
}