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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-10 09:00:27 +0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-07-11 14:23:34 +0400 |
| commit | 9b2fda7b94a769af13c24582739e50664b0e27a8 (patch) | |
| tree | 9569f151b19dec10a8b5d3741a5ad875a98a1a63 | |
| parent | 3d4d277cf88e1980d905707b9c8ca61e8ad6bf0b (diff) | |
| download | linux-9b2fda7b94a769af13c24582739e50664b0e27a8.tar.xz | |
crypto: sha256_generic - Add export/import support
This patch adds export/import support to sha256_generic. The exported
type is defined by struct sha256_state, which is basically the entire
descriptor state of sha256_generic.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/sha256_generic.c | 37 | ||||
| -rw-r--r-- | include/crypto/sha.h | 6 |
2 files changed, 31 insertions, 12 deletions
diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c index e58c71bdf333..c48459ebf05b 100644 --- a/crypto/sha256_generic.c +++ b/crypto/sha256_generic.c @@ -25,12 +25,6 @@ #include <crypto/sha.h> #include <asm/byteorder.h> -struct sha256_ctx { - u64 count; - u32 state[8]; - u8 buf[128]; -}; - static inline u32 Ch(u32 x, u32 y, u32 z) { return z ^ (x & (y ^ z)); @@ -222,7 +216,7 @@ static void sha256_transform(u32 *state, const u8 *input) static int sha224_init(struct shash_desc *desc) { - struct sha256_ctx *sctx = shash_desc_ctx(desc); + struct sha256_state *sctx = shash_desc_ctx(desc); sctx->state[0] = SHA224_H0; sctx->state[1] = SHA224_H1; sctx->state[2] = SHA224_H2; @@ -238,7 +232,7 @@ static int sha224_init(struct shash_desc *desc) static int sha256_init(struct shash_desc *desc) { - struct sha256_ctx *sctx = shash_desc_ctx(desc); + struct sha256_state *sctx = shash_desc_ctx(desc); sctx->state[0] = SHA256_H0; sctx->state[1] = SHA256_H1; sctx->state[2] = SHA256_H2; @@ -255,7 +249,7 @@ static int sha256_init(struct shash_desc *desc) static int sha256_update(struct shash_desc *desc, const u8 *data, unsigned int len) { - struct sha256_ctx *sctx = shash_desc_ctx(desc); + struct sha256_state *sctx = shash_desc_ctx(desc); unsigned int partial, done; const u8 *src; @@ -286,7 +280,7 @@ static int sha256_update(struct shash_desc *desc, const u8 *data, static int sha256_final(struct shash_desc *desc, u8 *out) { - struct sha256_ctx *sctx = shash_desc_ctx(desc); + struct sha256_state *sctx = shash_desc_ctx(desc); __be32 *dst = (__be32 *)out; __be64 bits; unsigned int index, pad_len; @@ -326,12 +320,31 @@ static int sha224_final(struct shash_desc *desc, u8 *hash) return 0; } +static int sha256_export(struct shash_desc *desc, void *out) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + + memcpy(out, sctx, sizeof(*sctx)); + return 0; +} + +static int sha256_import(struct shash_desc *desc, const void *in) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + + memcpy(sctx, in, sizeof(*sctx)); + return 0; +} + static struct shash_alg sha256 = { .digestsize = SHA256_DIGEST_SIZE, .init = sha256_init, .update = sha256_update, .final = sha256_final, - .descsize = sizeof(struct sha256_ctx), + .export = sha256_export, + .import = sha256_import, + .descsize = sizeof(struct sha256_state), + .statesize = sizeof(struct sha256_state), .base = { .cra_name = "sha256", .cra_driver_name= "sha256-generic", @@ -346,7 +359,7 @@ static struct shash_alg sha224 = { .init = sha224_init, .update = sha256_update, .final = sha224_final, - .descsize = sizeof(struct sha256_ctx), + .descsize = sizeof(struct sha256_state), .base = { .cra_name = "sha224", .cra_driver_name= "sha224-generic", diff --git a/include/crypto/sha.h b/include/crypto/sha.h index 922a248bd04d..88ef5eb9514d 100644 --- a/include/crypto/sha.h +++ b/include/crypto/sha.h @@ -70,4 +70,10 @@ struct sha1_state { u8 buffer[SHA1_BLOCK_SIZE]; }; +struct sha256_state { + u64 count; + u32 state[SHA256_DIGEST_SIZE / 4]; + u8 buf[SHA256_BLOCK_SIZE]; +}; + #endif |