diff options
Diffstat (limited to 'crypto/crc32c.c')
| -rw-r--r-- | crypto/crc32c.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/crypto/crc32c.c b/crypto/crc32c.c index f266012..0fa7443 100644 --- a/crypto/crc32c.c +++ b/crypto/crc32c.c @@ -16,14 +16,14 @@ #include <linux/string.h> #include <linux/crypto.h> #include <linux/crc32c.h> -#include <linux/types.h> -#include <asm/byteorder.h> +#include <linux/kernel.h> #define CHKSUM_BLOCK_SIZE 32 #define CHKSUM_DIGEST_SIZE 4 struct chksum_ctx { u32 crc; + u32 key; }; /* @@ -35,7 +35,7 @@ static void chksum_init(struct crypto_tfm *tfm) { struct chksum_ctx *mctx = crypto_tfm_ctx(tfm); - mctx->crc = ~(u32)0; /* common usage */ + mctx->crc = mctx->key; } /* @@ -44,16 +44,15 @@ static void chksum_init(struct crypto_tfm *tfm) * the seed. */ static int chksum_setkey(struct crypto_tfm *tfm, const u8 *key, - unsigned int keylen, u32 *flags) + unsigned int keylen) { struct chksum_ctx *mctx = crypto_tfm_ctx(tfm); if (keylen != sizeof(mctx->crc)) { - if (flags) - *flags = CRYPTO_TFM_RES_BAD_KEY_LEN; + tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; return -EINVAL; } - mctx->crc = __cpu_to_le32(*(u32 *)key); + mctx->key = le32_to_cpu(*(__le32 *)key); return 0; } @@ -61,19 +60,23 @@ static void chksum_update(struct crypto_tfm *tfm, const u8 *data, unsigned int length) { struct chksum_ctx *mctx = crypto_tfm_ctx(tfm); - u32 mcrc; - mcrc = crc32c(mctx->crc, data, (size_t)length); - - mctx->crc = mcrc; + mctx->crc = crc32c(mctx->crc, data, length); } static void chksum_final(struct crypto_tfm *tfm, u8 *out) { struct chksum_ctx *mctx = crypto_tfm_ctx(tfm); - u32 mcrc = (mctx->crc ^ ~(u32)0); - *(u32 *)out = __le32_to_cpu(mcrc); + *(__le32 *)out = ~cpu_to_le32(mctx->crc); +} + +static int crc32c_cra_init(struct crypto_tfm *tfm) +{ + struct chksum_ctx *mctx = crypto_tfm_ctx(tfm); + + mctx->key = ~0; + return 0; } static struct crypto_alg alg = { @@ -83,6 +86,7 @@ static struct crypto_alg alg = { .cra_ctxsize = sizeof(struct chksum_ctx), .cra_module = THIS_MODULE, .cra_list = LIST_HEAD_INIT(alg.cra_list), + .cra_init = crc32c_cra_init, .cra_u = { .digest = { .dia_digestsize= CHKSUM_DIGEST_SIZE, |
