diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-09 21:27:13 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-11 18:23:33 +0800 |
| commit | e2a7ce4e185a94462698cc0e5192495ee3d22a2f (patch) | |
| tree | 33013f177e48a3b4b191bfccfdb969cf0eeb8dbb | |
| parent | 8267adab9433593adb09d94626475c2a5921f111 (diff) | |
crypto: sha1_generic - Add export/import support
This patch adds export/import support to sha1_generic. The exported
type is defined by struct sha1_state, which is basically the entire
descriptor state of sha1_generic.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/sha1_generic.c | 41 | ||||
| -rw-r--r-- | include/crypto/sha.h | 8 |
2 files changed, 33 insertions, 16 deletions
diff --git a/crypto/sha1_generic.c b/crypto/sha1_generic.c index 9efef20454cb..0416091bf45a 100644 --- a/crypto/sha1_generic.c +++ b/crypto/sha1_generic.c @@ -25,31 +25,21 @@ #include <crypto/sha.h> #include <asm/byteorder.h> -struct sha1_ctx { - u64 count; - u32 state[5]; - u8 buffer[64]; -}; - static int sha1_init(struct shash_desc *desc) { - struct sha1_ctx *sctx = shash_desc_ctx(desc); + struct sha1_state *sctx = shash_desc_ctx(desc); - static const struct sha1_ctx initstate = { - 0, - { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 }, - { 0, } + *sctx = (struct sha1_state){ + .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 }, }; - *sctx = initstate; - return 0; } static int sha1_update(struct shash_desc *desc, const u8 *data, unsigned int len) { - struct sha1_ctx *sctx = shash_desc_ctx(desc); + struct sha1_state *sctx = shash_desc_ctx(desc); unsigned int partial, done; const u8 *src; @@ -85,7 +75,7 @@ static int sha1_update(struct shash_desc *desc, const u8 *data, /* Add padding and return the message digest. */ static int sha1_final(struct shash_desc *desc, u8 *out) { - struct sha1_ctx *sctx = shash_desc_ctx(desc); + struct sha1_state *sctx = shash_desc_ctx(desc); __be32 *dst = (__be32 *)out; u32 i, index, padlen; __be64 bits; @@ -111,12 +101,31 @@ static int sha1_final(struct shash_desc *desc, u8 *out) return 0; } +static int sha1_export(struct shash_desc *desc, void *out) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + + memcpy(out, sctx, sizeof(*sctx)); + return 0; +} + +static int sha1_import(struct shash_desc *desc, const void *in) +{ + struct sha1_state *sctx = shash_desc_ctx(desc); + + memcpy(sctx, in, sizeof(*sctx)); + return 0; +} + static struct shash_alg alg = { .digestsize = SHA1_DIGEST_SIZE, .init = sha1_init, .update = sha1_update, .final = sha1_final, - .descsize = sizeof(struct sha1_ctx), + .export = sha1_export, + .import = sha1_import, + .descsize = sizeof(struct sha1_state), + .statesize = sizeof(struct sha1_state), .base = { .cra_name = "sha1", .cra_driver_name= "sha1-generic", diff --git a/include/crypto/sha.h b/include/crypto/sha.h index c0ccc2b1a2d8..922a248bd04d 100644 --- a/include/crypto/sha.h +++ b/include/crypto/sha.h @@ -5,6 +5,8 @@ #ifndef _CRYPTO_SHA_H #define _CRYPTO_SHA_H +#include <linux/types.h> + #define SHA1_DIGEST_SIZE 20 #define SHA1_BLOCK_SIZE 64 @@ -62,4 +64,10 @@ #define SHA512_H6 0x1f83d9abfb41bd6bULL #define SHA512_H7 0x5be0cd19137e2179ULL +struct sha1_state { + u64 count; + u32 state[SHA1_DIGEST_SIZE / 4]; + u8 buffer[SHA1_BLOCK_SIZE]; +}; + #endif |