mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 03:36:19 +00:00
crypto: crc32c - Switch to shash
This patch changes crc32c to the new shash interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
parent
5f7082ed4f
commit
faccc4bba1
1 changed files with 67 additions and 146 deletions
213
crypto/crc32c.c
213
crypto/crc32c.c
|
|
@ -25,20 +25,26 @@
|
|||
#define CHKSUM_DIGEST_SIZE 4
|
||||
|
||||
struct chksum_ctx {
|
||||
u32 crc;
|
||||
u32 key;
|
||||
};
|
||||
|
||||
struct chksum_desc_ctx {
|
||||
u32 crc;
|
||||
};
|
||||
|
||||
/*
|
||||
* Steps through buffer one byte at at time, calculates reflected
|
||||
* crc using table.
|
||||
*/
|
||||
|
||||
static void chksum_init(struct crypto_tfm *tfm)
|
||||
static int chksum_init(struct shash_desc *desc)
|
||||
{
|
||||
struct chksum_ctx *mctx = crypto_tfm_ctx(tfm);
|
||||
struct chksum_ctx *mctx = crypto_shash_ctx(desc->tfm);
|
||||
struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
|
||||
|
||||
mctx->crc = mctx->key;
|
||||
ctx->crc = mctx->key;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -46,35 +52,59 @@ static void chksum_init(struct crypto_tfm *tfm)
|
|||
* If your algorithm starts with ~0, then XOR with ~0 before you set
|
||||
* the seed.
|
||||
*/
|
||||
static int chksum_setkey(struct crypto_tfm *tfm, const u8 *key,
|
||||
static int chksum_setkey(struct crypto_shash *tfm, const u8 *key,
|
||||
unsigned int keylen)
|
||||
{
|
||||
struct chksum_ctx *mctx = crypto_tfm_ctx(tfm);
|
||||
struct chksum_ctx *mctx = crypto_shash_ctx(tfm);
|
||||
|
||||
if (keylen != sizeof(mctx->crc)) {
|
||||
tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
|
||||
if (keylen != sizeof(mctx->key)) {
|
||||
crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
||||
return -EINVAL;
|
||||
}
|
||||
mctx->key = le32_to_cpu(*(__le32 *)key);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void chksum_update(struct crypto_tfm *tfm, const u8 *data,
|
||||
unsigned int length)
|
||||
static int chksum_update(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int length)
|
||||
{
|
||||
struct chksum_ctx *mctx = crypto_tfm_ctx(tfm);
|
||||
struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
|
||||
|
||||
mctx->crc = crc32c(mctx->crc, data, length);
|
||||
ctx->crc = crc32c(ctx->crc, data, length);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void chksum_final(struct crypto_tfm *tfm, u8 *out)
|
||||
static int chksum_final(struct shash_desc *desc, u8 *out)
|
||||
{
|
||||
struct chksum_ctx *mctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
*(__le32 *)out = ~cpu_to_le32(mctx->crc);
|
||||
struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
|
||||
|
||||
*(__le32 *)out = ~cpu_to_le32p(&ctx->crc);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crc32c_cra_init_old(struct crypto_tfm *tfm)
|
||||
static int __chksum_finup(u32 *crcp, const u8 *data, unsigned int len, u8 *out)
|
||||
{
|
||||
*(__le32 *)out = ~cpu_to_le32(crc32c(*crcp, data, len));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int chksum_finup(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int len, u8 *out)
|
||||
{
|
||||
struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
|
||||
|
||||
return __chksum_finup(&ctx->crc, data, len, out);
|
||||
}
|
||||
|
||||
static int chksum_digest(struct shash_desc *desc, const u8 *data,
|
||||
unsigned int length, u8 *out)
|
||||
{
|
||||
struct chksum_ctx *mctx = crypto_shash_ctx(desc->tfm);
|
||||
|
||||
return __chksum_finup(&mctx->key, data, length, out);
|
||||
}
|
||||
|
||||
static int crc32c_cra_init(struct crypto_tfm *tfm)
|
||||
{
|
||||
struct chksum_ctx *mctx = crypto_tfm_ctx(tfm);
|
||||
|
||||
|
|
@ -82,144 +112,35 @@ static int crc32c_cra_init_old(struct crypto_tfm *tfm)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static struct crypto_alg old_alg = {
|
||||
.cra_name = "crc32c",
|
||||
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
|
||||
.cra_blocksize = CHKSUM_BLOCK_SIZE,
|
||||
.cra_ctxsize = sizeof(struct chksum_ctx),
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_list = LIST_HEAD_INIT(old_alg.cra_list),
|
||||
.cra_init = crc32c_cra_init_old,
|
||||
.cra_u = {
|
||||
.digest = {
|
||||
.dia_digestsize= CHKSUM_DIGEST_SIZE,
|
||||
.dia_setkey = chksum_setkey,
|
||||
.dia_init = chksum_init,
|
||||
.dia_update = chksum_update,
|
||||
.dia_final = chksum_final
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/*
|
||||
* Setting the seed allows arbitrary accumulators and flexible XOR policy
|
||||
* If your algorithm starts with ~0, then XOR with ~0 before you set
|
||||
* the seed.
|
||||
*/
|
||||
static int crc32c_setkey(struct crypto_ahash *hash, const u8 *key,
|
||||
unsigned int keylen)
|
||||
{
|
||||
u32 *mctx = crypto_ahash_ctx(hash);
|
||||
|
||||
if (keylen != sizeof(u32)) {
|
||||
crypto_ahash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
||||
return -EINVAL;
|
||||
}
|
||||
*mctx = le32_to_cpup((__le32 *)key);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crc32c_init(struct ahash_request *req)
|
||||
{
|
||||
u32 *mctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
|
||||
u32 *crcp = ahash_request_ctx(req);
|
||||
|
||||
*crcp = *mctx;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crc32c_update(struct ahash_request *req)
|
||||
{
|
||||
struct crypto_hash_walk walk;
|
||||
u32 *crcp = ahash_request_ctx(req);
|
||||
u32 crc = *crcp;
|
||||
int nbytes;
|
||||
|
||||
for (nbytes = crypto_hash_walk_first(req, &walk); nbytes;
|
||||
nbytes = crypto_hash_walk_done(&walk, 0))
|
||||
crc = crc32c(crc, walk.data, nbytes);
|
||||
|
||||
*crcp = crc;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crc32c_final(struct ahash_request *req)
|
||||
{
|
||||
u32 *crcp = ahash_request_ctx(req);
|
||||
|
||||
*(__le32 *)req->result = ~cpu_to_le32p(crcp);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crc32c_digest(struct ahash_request *req)
|
||||
{
|
||||
struct crypto_hash_walk walk;
|
||||
u32 *mctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
|
||||
u32 crc = *mctx;
|
||||
int nbytes;
|
||||
|
||||
for (nbytes = crypto_hash_walk_first(req, &walk); nbytes;
|
||||
nbytes = crypto_hash_walk_done(&walk, 0))
|
||||
crc = crc32c(crc, walk.data, nbytes);
|
||||
|
||||
*(__le32 *)req->result = ~cpu_to_le32(crc);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int crc32c_cra_init(struct crypto_tfm *tfm)
|
||||
{
|
||||
u32 *key = crypto_tfm_ctx(tfm);
|
||||
|
||||
*key = ~0;
|
||||
|
||||
tfm->crt_ahash.reqsize = sizeof(u32);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct crypto_alg alg = {
|
||||
.cra_name = "crc32c",
|
||||
.cra_driver_name = "crc32c-generic",
|
||||
.cra_priority = 100,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_AHASH,
|
||||
.cra_blocksize = CHKSUM_BLOCK_SIZE,
|
||||
.cra_alignmask = 3,
|
||||
.cra_ctxsize = sizeof(u32),
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_list = LIST_HEAD_INIT(alg.cra_list),
|
||||
.cra_init = crc32c_cra_init,
|
||||
.cra_type = &crypto_ahash_type,
|
||||
.cra_u = {
|
||||
.ahash = {
|
||||
.digestsize = CHKSUM_DIGEST_SIZE,
|
||||
.setkey = crc32c_setkey,
|
||||
.init = crc32c_init,
|
||||
.update = crc32c_update,
|
||||
.final = crc32c_final,
|
||||
.digest = crc32c_digest,
|
||||
}
|
||||
static struct shash_alg alg = {
|
||||
.digestsize = CHKSUM_DIGEST_SIZE,
|
||||
.setkey = chksum_setkey,
|
||||
.init = chksum_init,
|
||||
.update = chksum_update,
|
||||
.final = chksum_final,
|
||||
.finup = chksum_finup,
|
||||
.digest = chksum_digest,
|
||||
.descsize = sizeof(struct chksum_desc_ctx),
|
||||
.base = {
|
||||
.cra_name = "crc32c",
|
||||
.cra_driver_name = "crc32c-generic",
|
||||
.cra_priority = 100,
|
||||
.cra_blocksize = CHKSUM_BLOCK_SIZE,
|
||||
.cra_alignmask = 3,
|
||||
.cra_ctxsize = sizeof(struct chksum_ctx),
|
||||
.cra_module = THIS_MODULE,
|
||||
.cra_init = crc32c_cra_init,
|
||||
}
|
||||
};
|
||||
|
||||
static int __init crc32c_mod_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = crypto_register_alg(&old_alg);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = crypto_register_alg(&alg);
|
||||
if (err)
|
||||
crypto_unregister_alg(&old_alg);
|
||||
|
||||
return err;
|
||||
return crypto_register_shash(&alg);
|
||||
}
|
||||
|
||||
static void __exit crc32c_mod_fini(void)
|
||||
{
|
||||
crypto_unregister_alg(&alg);
|
||||
crypto_unregister_alg(&old_alg);
|
||||
crypto_unregister_shash(&alg);
|
||||
}
|
||||
|
||||
module_init(crc32c_mod_init);
|
||||
|
|
|
|||
Loading…
Reference in a new issue