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crypto: inside-secure - refrain from unneeded invalidations

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The check to know if an invalidation is needed (i.e. when the context
changes) is done even if the context does not exist yet. This happens
when first setting a key for ciphers and/or hmac operations.

This commits adds a check in the _setkey functions to only check if an
invalidation is needed when a context exists, as there is no need to
perform this check otherwise.

Signed-off-by: Ofer Heifetz <oferh@marvell.com>
[Antoine: commit message and added a comment and reworked one of the
checks]
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ofer Heifetz 2017-12-14 15:26:47 +01:00 committed by Herbert Xu
parent cc75f5ce82
commit c4daf4cc9c
2 changed files with 22 additions and 12 deletions
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10
drivers/crypto/inside-secure/safexcel_cipher.c
View File

@ -78,10 +78,12 @@ static int safexcel_aes_setkey(struct crypto_skcipher *ctfm, const u8 *key,
return ret;
}
for (i = 0; i < len / sizeof(u32); i++) {
if (ctx->key[i] != cpu_to_le32(aes.key_enc[i])) {
ctx->base.needs_inv = true;
break;
if (ctx->base.ctxr_dma) {
for (i = 0; i < len / sizeof(u32); i++) {
if (ctx->key[i] != cpu_to_le32(aes.key_enc[i])) {
ctx->base.needs_inv = true;
break;
}
}
}

24
drivers/crypto/inside-secure/safexcel_hash.c
View File

@ -527,10 +527,16 @@ static int safexcel_ahash_enqueue(struct ahash_request *areq)
req->needs_inv = false;
if (req->processed && ctx->digest == CONTEXT_CONTROL_DIGEST_PRECOMPUTED)
ctx->base.needs_inv = safexcel_ahash_needs_inv_get(areq);
if (ctx->base.ctxr) {
if (!ctx->base.needs_inv && req->processed &&
ctx->digest == CONTEXT_CONTROL_DIGEST_PRECOMPUTED)
/* We're still setting needs_inv here, even though it is
* cleared right away, because the needs_inv flag can be
* set in other functions and we want to keep the same
* logic.
*/
ctx->base.needs_inv = safexcel_ahash_needs_inv_get(areq);
if (ctx->base.needs_inv) {
ctx->base.needs_inv = false;
req->needs_inv = true;
@ -928,11 +934,13 @@ static int safexcel_hmac_sha1_setkey(struct crypto_ahash *tfm, const u8 *key,
if (ret)
return ret;
for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++) {
if (ctx->ipad[i] != le32_to_cpu(istate.state[i]) ||
ctx->opad[i] != le32_to_cpu(ostate.state[i])) {
ctx->base.needs_inv = true;
break;
if (ctx->base.ctxr) {
for (i = 0; i < SHA1_DIGEST_SIZE / sizeof(u32); i++) {
if (ctx->ipad[i] != le32_to_cpu(istate.state[i]) ||
ctx->opad[i] != le32_to_cpu(ostate.state[i])) {
ctx->base.needs_inv = true;
break;
}
}
}