6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jia Jie Ho <jiajie.ho@xxxxxxxxxxxxxxxx>
[ Upstream commit 6aad7019f697ab0bed98eba737d19bd7f67713de ]
Hardware expects RSA input plain/ciphertext to be 32-bit aligned.
Set fixed length for preallocated buffer to the maximum supported
keysize of the hardware and shift input text accordingly.
Signed-off-by: Jia Jie Ho <jiajie.ho@xxxxxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/crypto/starfive/jh7110-cryp.h | 3 ++-
drivers/crypto/starfive/jh7110-rsa.c | 12 ++++++++----
2 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/crypto/starfive/jh7110-cryp.h b/drivers/crypto/starfive/jh7110-cryp.h
index fe011d50473d..f386e9897896 100644
--- a/drivers/crypto/starfive/jh7110-cryp.h
+++ b/drivers/crypto/starfive/jh7110-cryp.h
@@ -30,6 +30,7 @@
#define MAX_KEY_SIZE SHA512_BLOCK_SIZE
#define STARFIVE_AES_IV_LEN AES_BLOCK_SIZE
#define STARFIVE_AES_CTR_LEN AES_BLOCK_SIZE
+#define STARFIVE_RSA_MAX_KEYSZ 256
union starfive_aes_csr {
u32 v;
@@ -217,7 +218,7 @@ struct starfive_cryp_request_ctx {
unsigned int digsize;
unsigned long in_sg_len;
unsigned char *adata;
- u8 rsa_data[] __aligned(sizeof(u32));
+ u8 rsa_data[STARFIVE_RSA_MAX_KEYSZ] __aligned(sizeof(u32));
};
struct starfive_cryp_dev *starfive_cryp_find_dev(struct starfive_cryp_ctx *ctx);
diff --git a/drivers/crypto/starfive/jh7110-rsa.c b/drivers/crypto/starfive/jh7110-rsa.c
index f31bbd825f88..fbc06f8ee95f 100644
--- a/drivers/crypto/starfive/jh7110-rsa.c
+++ b/drivers/crypto/starfive/jh7110-rsa.c
@@ -37,7 +37,6 @@
// A * A * R mod N ==> A
#define CRYPTO_CMD_AARN 0x7
-#define STARFIVE_RSA_MAX_KEYSZ 256
#define STARFIVE_RSA_RESET 0x2
static inline int starfive_pka_wait_done(struct starfive_cryp_ctx *ctx)
@@ -91,7 +90,7 @@ static int starfive_rsa_montgomery_form(struct starfive_cryp_ctx *ctx,
{
struct starfive_cryp_dev *cryp = ctx->cryp;
struct starfive_cryp_request_ctx *rctx = ctx->rctx;
- int count = rctx->total / sizeof(u32) - 1;
+ int count = (ALIGN(rctx->total, 4) / 4) - 1;
int loop;
u32 temp;
u8 opsize;
@@ -274,12 +273,17 @@ static int starfive_rsa_enc_core(struct starfive_cryp_ctx *ctx, int enc)
struct starfive_cryp_dev *cryp = ctx->cryp;
struct starfive_cryp_request_ctx *rctx = ctx->rctx;
struct starfive_rsa_key *key = &ctx->rsa_key;
- int ret = 0;
+ int ret = 0, shift = 0;
writel(STARFIVE_RSA_RESET, cryp->base + STARFIVE_PKA_CACR_OFFSET);
+ if (!IS_ALIGNED(rctx->total, sizeof(u32))) {
+ shift = sizeof(u32) - (rctx->total & 0x3);
+ memset(rctx->rsa_data, 0, shift);
+ }
+
rctx->total = sg_copy_to_buffer(rctx->in_sg, rctx->nents,
- rctx->rsa_data, rctx->total);
+ rctx->rsa_data + shift, rctx->total);
if (enc) {
key->bitlen = key->e_bitlen;
--
2.43.0
