4.19-stable review patch. If anyone has any objections, please let me know.
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From: Ovidiu Panait ovidiu.panait@windriver.com
[ Upstream commit 8fd183435728b139248a77978ea3732039341779 ]
Remove the FLAGS_NEW_KEY logic as it has the following issues: - the wrong key may end up being used when there are multiple data streams: t1 t2 setkey() encrypt() setkey() encrypt()
encrypt() <--- key from t2 is used - switching between encryption and decryption with the same key is not possible, as the hdr flags are only updated when a new setkey() is performed
With this change, the key is always sent along with the cryptdata when performing encryption/decryption operations.
Fixes: 5de8875281e1 ("crypto: sahara - Add driver for SAHARA2 accelerator.") Signed-off-by: Ovidiu Panait ovidiu.panait@windriver.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/sahara.c | 34 +++++++++++++--------------------- 1 file changed, 13 insertions(+), 21 deletions(-)
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c index e7540a5b8197..5bd2c34a9ceb 100644 --- a/drivers/crypto/sahara.c +++ b/drivers/crypto/sahara.c @@ -46,7 +46,6 @@ #define FLAGS_MODE_MASK 0x000f #define FLAGS_ENCRYPT BIT(0) #define FLAGS_CBC BIT(1) -#define FLAGS_NEW_KEY BIT(3)
#define SAHARA_HDR_BASE 0x00800000 #define SAHARA_HDR_SKHA_ALG_AES 0 @@ -144,8 +143,6 @@ struct sahara_hw_link { };
struct sahara_ctx { - unsigned long flags; - /* AES-specific context */ int keylen; u8 key[AES_KEYSIZE_128]; @@ -449,26 +446,22 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev) int i, j; int idx = 0;
- /* Copy new key if necessary */ - if (ctx->flags & FLAGS_NEW_KEY) { - memcpy(dev->key_base, ctx->key, ctx->keylen); - ctx->flags &= ~FLAGS_NEW_KEY; + memcpy(dev->key_base, ctx->key, ctx->keylen);
- if (dev->flags & FLAGS_CBC) { - dev->hw_desc[idx]->len1 = AES_BLOCK_SIZE; - dev->hw_desc[idx]->p1 = dev->iv_phys_base; - } else { - dev->hw_desc[idx]->len1 = 0; - dev->hw_desc[idx]->p1 = 0; - } - dev->hw_desc[idx]->len2 = ctx->keylen; - dev->hw_desc[idx]->p2 = dev->key_phys_base; - dev->hw_desc[idx]->next = dev->hw_phys_desc[1]; + if (dev->flags & FLAGS_CBC) { + dev->hw_desc[idx]->len1 = AES_BLOCK_SIZE; + dev->hw_desc[idx]->p1 = dev->iv_phys_base; + } else { + dev->hw_desc[idx]->len1 = 0; + dev->hw_desc[idx]->p1 = 0; + } + dev->hw_desc[idx]->len2 = ctx->keylen; + dev->hw_desc[idx]->p2 = dev->key_phys_base; + dev->hw_desc[idx]->next = dev->hw_phys_desc[1]; + dev->hw_desc[idx]->hdr = sahara_aes_key_hdr(dev);
- dev->hw_desc[idx]->hdr = sahara_aes_key_hdr(dev); + idx++;
- idx++; - }
dev->nb_in_sg = sg_nents_for_len(dev->in_sg, dev->total); if (dev->nb_in_sg < 0) { @@ -611,7 +604,6 @@ static int sahara_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, /* SAHARA only supports 128bit keys */ if (keylen == AES_KEYSIZE_128) { memcpy(ctx->key, key, keylen); - ctx->flags |= FLAGS_NEW_KEY; return 0; }