* any later version.
*
*/
-#include <linux/crypto.h>
+
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/highmem.h>
-#include <asm/scatterlist.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+
#include "internal.h"
+#include "scatterwalk.h"
-static void init(struct crypto_tfm *tfm)
+static int init(struct hash_desc *desc)
{
- tfm->__crt_alg->cra_digest.dia_init(crypto_tfm_ctx(tfm));
+ struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
+
+ tfm->__crt_alg->cra_digest.dia_init(tfm);
+ return 0;
}
-static void update(struct crypto_tfm *tfm,
- struct scatterlist *sg, unsigned int nsg)
+static int update(struct hash_desc *desc,
+ struct scatterlist *sg, unsigned int nbytes)
{
- unsigned int i;
+ struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
+ unsigned int alignmask = crypto_tfm_alg_alignmask(tfm);
- for (i = 0; i < nsg; i++) {
+ if (!nbytes)
+ return 0;
- struct page *pg = sg[i].page;
- unsigned int offset = sg[i].offset;
- unsigned int l = sg[i].length;
+ for (;;) {
+ struct page *pg = sg->page;
+ unsigned int offset = sg->offset;
+ unsigned int l = sg->length;
+
+ if (unlikely(l > nbytes))
+ l = nbytes;
+ nbytes -= l;
do {
unsigned int bytes_from_page = min(l, ((unsigned int)
(PAGE_SIZE)) -
offset);
- char *p = crypto_kmap(pg, 0) + offset;
+ char *src = crypto_kmap(pg, 0);
+ char *p = src + offset;
- tfm->__crt_alg->cra_digest.dia_update
- (crypto_tfm_ctx(tfm), p,
- bytes_from_page);
- crypto_kunmap(p, 0);
- crypto_yield(tfm);
+ if (unlikely(offset & alignmask)) {
+ unsigned int bytes =
+ alignmask + 1 - (offset & alignmask);
+ bytes = min(bytes, bytes_from_page);
+ tfm->__crt_alg->cra_digest.dia_update(tfm, p,
+ bytes);
+ p += bytes;
+ bytes_from_page -= bytes;
+ l -= bytes;
+ }
+ tfm->__crt_alg->cra_digest.dia_update(tfm, p,
+ bytes_from_page);
+ crypto_kunmap(src, 0);
+ crypto_yield(desc->flags);
offset = 0;
pg++;
l -= bytes_from_page;
} while (l > 0);
+
+ if (!nbytes)
+ break;
+ sg = sg_next(sg);
}
+
+ return 0;
+}
+
+static void update_kernel(struct hash_desc *desc,
+ const void *data, size_t count)
+{
+ struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
+ tfm->__crt_alg->cra_digest.dia_update(tfm, data, count);
+ crypto_yield(desc->flags);
}
-static void final(struct crypto_tfm *tfm, u8 *out)
+static int final(struct hash_desc *desc, u8 *out)
{
- tfm->__crt_alg->cra_digest.dia_final(crypto_tfm_ctx(tfm), out);
+ struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
+ unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
+ struct digest_alg *digest = &tfm->__crt_alg->cra_digest;
+
+ if (unlikely((unsigned long)out & alignmask)) {
+ unsigned long align = alignmask + 1;
+ unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm);
+ u8 *dst = (u8 *)ALIGN(addr, align) +
+ ALIGN(tfm->__crt_alg->cra_ctxsize, align);
+
+ digest->dia_final(tfm, dst);
+ memcpy(out, dst, digest->dia_digestsize);
+ } else
+ digest->dia_final(tfm, out);
+
+ return 0;
}
-static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
+static int nosetkey(struct crypto_hash *tfm, const u8 *key, unsigned int keylen)
{
- u32 flags;
- if (tfm->__crt_alg->cra_digest.dia_setkey == NULL)
- return -ENOSYS;
- return tfm->__crt_alg->cra_digest.dia_setkey(crypto_tfm_ctx(tfm),
- key, keylen, &flags);
+ crypto_hash_clear_flags(tfm, CRYPTO_TFM_RES_MASK);
+ return -ENOSYS;
}
-static void digest(struct crypto_tfm *tfm,
- struct scatterlist *sg, unsigned int nsg, u8 *out)
+static int setkey(struct crypto_hash *hash, const u8 *key, unsigned int keylen)
{
- unsigned int i;
-
- tfm->crt_digest.dit_init(tfm);
-
- for (i = 0; i < nsg; i++) {
- char *p = crypto_kmap(sg[i].page, 0) + sg[i].offset;
- tfm->__crt_alg->cra_digest.dia_update(crypto_tfm_ctx(tfm),
- p, sg[i].length);
- crypto_kunmap(p, 0);
- crypto_yield(tfm);
- }
- crypto_digest_final(tfm, out);
+ struct crypto_tfm *tfm = crypto_hash_tfm(hash);
+
+ crypto_hash_clear_flags(hash, CRYPTO_TFM_RES_MASK);
+ return tfm->__crt_alg->cra_digest.dia_setkey(tfm, key, keylen);
+}
+
+static int digest(struct hash_desc *desc,
+ struct scatterlist *sg, unsigned int nbytes, u8 *out)
+{
+ init(desc);
+ update(desc, sg, nbytes);
+ return final(desc, out);
}
int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags)
int crypto_init_digest_ops(struct crypto_tfm *tfm)
{
- struct digest_tfm *ops = &tfm->crt_digest;
+ struct hash_tfm *ops = &tfm->crt_hash;
+ struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
+
+ if (dalg->dia_digestsize > crypto_tfm_alg_blocksize(tfm))
+ return -EINVAL;
- ops->dit_init = init;
- ops->dit_update = update;
- ops->dit_final = final;
- ops->dit_digest = digest;
- ops->dit_setkey = setkey;
+ ops->init = init;
+ ops->update = update;
+ ops->update_kernel = update_kernel;
+ ops->final = final;
+ ops->digest = digest;
+ ops->setkey = dalg->dia_setkey ? setkey : nosetkey;
+ ops->digestsize = dalg->dia_digestsize;
- return crypto_alloc_hmac_block(tfm);
+ return 0;
}
void crypto_exit_digest_ops(struct crypto_tfm *tfm)
{
- crypto_free_hmac_block(tfm);
}
git://git.onelab.eu / linux-2.6.git / blobdiff