From 54eea8e29026c6cceeb52151f46e3b994de5513a Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Sun, 22 Oct 2023 01:10:43 -0700 Subject: [PATCH] crypto: stm32 - remove unnecessary 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 stm32 driver no longer use it. This driver didn't actually rely on it; it only writes to the result buffer in stm32_hash_finish(), simply using memcpy(). And stm32_hash_setkey() does not assume any alignment for the key buffer. Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu --- drivers/crypto/stm32/stm32-hash.c | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index 2b2382d4332c..34e0d7e381a8 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -1283,7 +1283,6 @@ static struct ahash_engine_alg algs_md5[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = MD5_HMAC_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1313,7 +1312,6 @@ static struct ahash_engine_alg algs_md5[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = MD5_HMAC_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1345,7 +1343,6 @@ static struct ahash_engine_alg algs_sha1[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1375,7 +1372,6 @@ static struct ahash_engine_alg algs_sha1[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1407,7 +1403,6 @@ static struct ahash_engine_alg algs_sha224[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA224_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1437,7 +1432,6 @@ static struct ahash_engine_alg algs_sha224[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA224_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1469,7 +1463,6 @@ static struct ahash_engine_alg algs_sha256[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA256_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1499,7 +1492,6 @@ static struct ahash_engine_alg algs_sha256[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA256_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1531,7 +1523,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA384_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1561,7 +1552,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA384_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1590,7 +1580,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA512_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1620,7 +1609,6 @@ static struct ahash_engine_alg algs_sha384_sha512[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA512_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1652,7 +1640,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_224_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1682,7 +1669,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_224_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1711,7 +1697,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_256_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1741,7 +1726,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_256_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1770,7 +1754,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_384_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1800,7 +1783,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_384_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1829,7 +1811,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_512_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE, @@ -1859,7 +1840,6 @@ static struct ahash_engine_alg algs_sha3[] = { CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = SHA3_512_BLOCK_SIZE, .cra_ctxsize = sizeof(struct stm32_hash_ctx), - .cra_alignmask = 3, .cra_init = stm32_hash_cra_sha3_hmac_init, .cra_exit = stm32_hash_cra_exit, .cra_module = THIS_MODULE,