From f35a4e237f4ecfac0cbf51fc840fe70955431fa9 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Sun, 22 Oct 2023 01:10:40 -0700 Subject: [PATCH] crypto: omap-sham - stop setting alignmask for ahashes The crypto API's support for alignmasks for ahash algorithms is nearly useless, as its only effect is to cause the API to align the key and result buffers. The drivers that happen to be specifying an alignmask for ahash rarely actually need it. When they do, it's easily fixable, especially considering that these buffers cannot be used for DMA. In preparation for removing alignmask support from ahash, this patch makes the omap-sham driver no longer use it. This driver did actually rely on it, but only for storing to the result buffer using __u32 stores in omap_sham_copy_ready_hash(). This patch makes omap_sham_copy_ready_hash() use put_unaligned() instead. (It really should use a specific endianness, but that's an existing bug.) Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu --- drivers/crypto/omap-sham.c | 16 ++-------------- 1 file changed, 2 insertions(+), 14 deletions(-) diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 496602f7caa59..5bcd9ab0f72ad 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -356,10 +356,10 @@ static void omap_sham_copy_ready_hash(struct ahash_request *req) if (big_endian) for (i = 0; i < d; i++) - hash[i] = be32_to_cpup((__be32 *)in + i); + put_unaligned(be32_to_cpup((__be32 *)in + i), &hash[i]); else for (i = 0; i < d; i++) - hash[i] = le32_to_cpup((__le32 *)in + i); + put_unaligned(le32_to_cpup((__le32 *)in + i), &hash[i]); } static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length, @@ -1435,7 +1435,6 @@ static struct ahash_engine_alg algs_sha1_md5[] = { CRYPTO_ALG_NEED_FALLBACK, .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_init, .cra_exit = omap_sham_cra_exit, @@ -1458,7 +1457,6 @@ static struct ahash_engine_alg algs_sha1_md5[] = { CRYPTO_ALG_NEED_FALLBACK, .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_init, .cra_exit = omap_sham_cra_exit, @@ -1483,7 +1481,6 @@ static struct ahash_engine_alg algs_sha1_md5[] = { .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx) + sizeof(struct omap_sham_hmac_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_sha1_init, .cra_exit = omap_sham_cra_exit, @@ -1508,7 +1505,6 @@ static struct ahash_engine_alg algs_sha1_md5[] = { .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx) + sizeof(struct omap_sham_hmac_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_md5_init, .cra_exit = omap_sham_cra_exit, @@ -1535,7 +1531,6 @@ static struct ahash_engine_alg algs_sha224_sha256[] = { CRYPTO_ALG_NEED_FALLBACK, .cra_blocksize = SHA224_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_init, .cra_exit = omap_sham_cra_exit, @@ -1558,7 +1553,6 @@ static struct ahash_engine_alg algs_sha224_sha256[] = { CRYPTO_ALG_NEED_FALLBACK, .cra_blocksize = SHA256_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_init, .cra_exit = omap_sham_cra_exit, @@ -1583,7 +1577,6 @@ static struct ahash_engine_alg algs_sha224_sha256[] = { .cra_blocksize = SHA224_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx) + sizeof(struct omap_sham_hmac_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_sha224_init, .cra_exit = omap_sham_cra_exit, @@ -1608,7 +1601,6 @@ static struct ahash_engine_alg algs_sha224_sha256[] = { .cra_blocksize = SHA256_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx) + sizeof(struct omap_sham_hmac_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_sha256_init, .cra_exit = omap_sham_cra_exit, @@ -1634,7 +1626,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { CRYPTO_ALG_NEED_FALLBACK, .cra_blocksize = SHA384_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_init, .cra_exit = omap_sham_cra_exit, @@ -1657,7 +1648,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { CRYPTO_ALG_NEED_FALLBACK, .cra_blocksize = SHA512_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_init, .cra_exit = omap_sham_cra_exit, @@ -1682,7 +1672,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { .cra_blocksize = SHA384_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx) + sizeof(struct omap_sham_hmac_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_sha384_init, .cra_exit = omap_sham_cra_exit, @@ -1707,7 +1696,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { .cra_blocksize = SHA512_BLOCK_SIZE, .cra_ctxsize = sizeof(struct omap_sham_ctx) + sizeof(struct omap_sham_hmac_ctx), - .cra_alignmask = OMAP_ALIGN_MASK, .cra_module = THIS_MODULE, .cra_init = omap_sham_cra_sha512_init, .cra_exit = omap_sham_cra_exit, -- 2.30.2