path: root/include/crypto
diff options
authorHerbert Xu <herbert@gondor.apana.org.au>2009-07-09 20:30:57 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2009-07-11 18:23:32 +0800
commit99d27e1c59e34869605de625b033c52163f5bfa7 (patch)
treed7e6477e8a61630fc23088e795730a7fcda60873 /include/crypto
parentcrypto: api - Fix crypto_drop_spawn crash on blank spawns (diff)
crypto: shash - Export/import hash state only
This patch replaces the full descriptor export with an export of the partial hash state. This allows the use of a consistent export format across all implementations of a given algorithm. This is useful because a number of cases require the use of the partial hash state, e.g., PadLock can use the SHA1 hash state to get around the fact that it can only hash contiguous data chunks. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
1 files changed, 14 insertions, 4 deletions
diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index d56bb71617c3..3c4cce6a425c 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -24,7 +24,6 @@ struct shash_desc {
struct shash_alg {
int (*init)(struct shash_desc *desc);
- int (*reinit)(struct shash_desc *desc);
int (*update)(struct shash_desc *desc, const u8 *data,
unsigned int len);
int (*final)(struct shash_desc *desc, u8 *out);
@@ -32,11 +31,14 @@ struct shash_alg {
unsigned int len, u8 *out);
int (*digest)(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out);
+ int (*export)(struct shash_desc *desc, void *out);
+ int (*import)(struct shash_desc *desc, const void *in);
int (*setkey)(struct crypto_shash *tfm, const u8 *key,
unsigned int keylen);
unsigned int descsize;
unsigned int digestsize;
+ unsigned int statesize;
struct crypto_alg base;
@@ -251,6 +253,11 @@ static inline unsigned int crypto_shash_digestsize(struct crypto_shash *tfm)
return crypto_shash_alg(tfm)->digestsize;
+static inline unsigned int crypto_shash_statesize(struct crypto_shash *tfm)
+ return crypto_shash_alg(tfm)->statesize;
static inline u32 crypto_shash_get_flags(struct crypto_shash *tfm)
return crypto_tfm_get_flags(crypto_shash_tfm(tfm));
@@ -281,12 +288,15 @@ int crypto_shash_setkey(struct crypto_shash *tfm, const u8 *key,
int crypto_shash_digest(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *out);
-static inline void crypto_shash_export(struct shash_desc *desc, u8 *out)
+static inline int crypto_shash_export(struct shash_desc *desc, void *out)
- memcpy(out, shash_desc_ctx(desc), crypto_shash_descsize(desc->tfm));
+ return crypto_shash_alg(desc->tfm)->export(desc, out);
-int crypto_shash_import(struct shash_desc *desc, const u8 *in);
+static inline int crypto_shash_import(struct shash_desc *desc, const void *in)
+ return crypto_shash_alg(desc->tfm)->import(desc, in);
static inline int crypto_shash_init(struct shash_desc *desc)