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54 lines
1.9 KiB
Diff
54 lines
1.9 KiB
Diff
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From bbf2b1cf22dc98f3df33b6666df046dfb9564d91 Mon Sep 17 00:00:00 2001
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From: Eneas U de Queiroz <cotequeiroz@gmail.com>
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Date: Wed, 5 Feb 2020 13:42:25 -0300
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Subject: [PATCH] crypto: qce - handle AES-XTS cases that qce fails
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QCE hangs when presented with an AES-XTS request whose length is larger
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than QCE_SECTOR_SIZE (512-bytes), and is not a multiple of it. Let the
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fallback cipher handle them.
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Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
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--- a/drivers/crypto/qce/common.c
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+++ b/drivers/crypto/qce/common.c
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@@ -23,8 +23,6 @@
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#include "regs-v5.h"
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#include "sha.h"
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-#define QCE_SECTOR_SIZE 512
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-
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static inline u32 qce_read(struct qce_device *qce, u32 offset)
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{
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return readl(qce->base + offset);
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--- a/drivers/crypto/qce/common.h
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+++ b/drivers/crypto/qce/common.h
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@@ -20,6 +20,9 @@
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#include <crypto/hash.h>
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#include <crypto/internal/skcipher.h>
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+/* xts du size */
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+#define QCE_SECTOR_SIZE 512
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+
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/* key size in bytes */
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#define QCE_SHA_HMAC_KEY_SIZE 64
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#define QCE_MAX_CIPHER_KEY_SIZE AES_KEYSIZE_256
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--- a/drivers/crypto/qce/skcipher.c
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+++ b/drivers/crypto/qce/skcipher.c
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@@ -213,9 +213,14 @@ static int qce_skcipher_crypt(struct skc
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rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
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keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen;
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+ /* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and
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+ * is not a multiple of it; pass such requests to the fallback
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+ */
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if (IS_AES(rctx->flags) &&
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- ((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) ||
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- req->cryptlen <= aes_sw_max_len)) {
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+ (((keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) ||
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+ req->cryptlen <= aes_sw_max_len) ||
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+ (IS_XTS(rctx->flags) && req->cryptlen > QCE_SECTOR_SIZE &&
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+ req->cryptlen % QCE_SECTOR_SIZE))) {
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SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
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skcipher_request_set_tfm(subreq, ctx->fallback);
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