Commit fffe7d92 authored by Eric Biggers's avatar Eric Biggers Committed by Herbert Xu

crypto: crc32-generic - use unaligned access macros when needed

crc32-generic doesn't have a cra_alignmask set, which is desired as its
->update() works with any alignment.  However, it incorrectly assumes
4-byte alignment in ->setkey() and when outputting the final digest.

Fix this by using the unaligned access macros in those cases.
Signed-off-by: default avatarEric Biggers <>
Signed-off-by: default avatarHerbert Xu <>
parent f16b613c
......@@ -29,6 +29,7 @@
* This is crypto api shash wrappers to crc32_le.
#include <asm/unaligned.h>
#include <linux/crc32.h>
#include <crypto/internal/hash.h>
#include <linux/init.h>
......@@ -69,7 +70,7 @@ static int crc32_setkey(struct crypto_shash *hash, const u8 *key,
crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
*mctx = le32_to_cpup((__le32 *)key);
*mctx = get_unaligned_le32(key);
return 0;
......@@ -96,7 +97,7 @@ static int crc32_update(struct shash_desc *desc, const u8 *data,
static int __crc32_finup(u32 *crcp, const u8 *data, unsigned int len,
u8 *out)
*(__le32 *)out = cpu_to_le32(__crc32_le(*crcp, data, len));
put_unaligned_le32(__crc32_le(*crcp, data, len), out);
return 0;
......@@ -110,7 +111,7 @@ static int crc32_final(struct shash_desc *desc, u8 *out)
u32 *crcp = shash_desc_ctx(desc);
*(__le32 *)out = cpu_to_le32p(crcp);
put_unaligned_le32(*crcp, out);
return 0;
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