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[CRYPTO] digest: Remove unnecessary zeroing during init 

Various digest algorithms operate one block at a time and therefore
keep a temporary buffer of partial blocks.  This buffer does not need
to be initialised since there is a counter which indicates what is and
isn't valid in it.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2006-05-16 22:06:54 +10:00
parent 8b55ba0303
commit 43600106e3
5 changed files with 12 additions and 16 deletions
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23
arch/s390/crypto/sha1_s390.c
View File

@ -40,19 +40,20 @@ struct crypt_s390_sha1_ctx {
u8 buffer[2 * SHA1_BLOCK_SIZE]; u8 buffer[2 * SHA1_BLOCK_SIZE];
}; };
static void static void sha1_init(void *ctx_arg)
sha1_init(void *ctx)
{ {
static const struct crypt_s390_sha1_ctx initstate = { struct crypt_s390_sha1_ctx *ctx = ctx_arg;
.state = { static const u32 initstate[5] = {
0x67452301, 0x67452301,
0xEFCDAB89, 0xEFCDAB89,
0x98BADCFE, 0x98BADCFE,
0x10325476, 0x10325476,
0xC3D2E1F0 0xC3D2E1F0
},
}; };
memcpy(ctx, &initstate, sizeof(initstate));
ctx->count = 0;
memcpy(ctx->state, &initstate, sizeof(initstate));
ctx->buf_len = 0;
} }
static void static void

1
arch/s390/crypto/sha256_s390.c
View File

@ -44,7 +44,6 @@ static void sha256_init(void *ctx)
sctx->state[6] = 0x1f83d9ab; sctx->state[6] = 0x1f83d9ab;
sctx->state[7] = 0x5be0cd19; sctx->state[7] = 0x5be0cd19;
sctx->count = 0; sctx->count = 0;
memset(sctx->buf, 0, sizeof(sctx->buf));
} }
static void sha256_update(void *ctx, const u8 *data, unsigned int len) static void sha256_update(void *ctx, const u8 *data, unsigned int len)

1
crypto/sha256.c
View File

@ -242,7 +242,6 @@ static void sha256_init(void *ctx)
sctx->state[6] = H6; sctx->state[6] = H6;
sctx->state[7] = H7; sctx->state[7] = H7;
sctx->count[0] = sctx->count[1] = 0; sctx->count[0] = sctx->count[1] = 0;
memset(sctx->buf, 0, sizeof(sctx->buf));
} }
static void sha256_update(void *ctx, const u8 *data, unsigned int len) static void sha256_update(void *ctx, const u8 *data, unsigned int len)

2
crypto/sha512.c
View File

@ -173,7 +173,6 @@ sha512_init(void *ctx)
sctx->state[6] = H6; sctx->state[6] = H6;
sctx->state[7] = H7; sctx->state[7] = H7;
sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;
memset(sctx->buf, 0, sizeof(sctx->buf));
} }
static void static void
@ -189,7 +188,6 @@ sha384_init(void *ctx)
sctx->state[6] = HP6; sctx->state[6] = HP6;
sctx->state[7] = HP7; sctx->state[7] = HP7;
sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;
memset(sctx->buf, 0, sizeof(sctx->buf));
} }
static void static void

1
crypto/tgr192.c
View File

@ -500,7 +500,6 @@ static void tgr192_init(void *ctx)
{ {
struct tgr192_ctx *tctx = ctx; struct tgr192_ctx *tctx = ctx;
memset (tctx->hash, 0, 64);
tctx->a = 0x0123456789abcdefULL; tctx->a = 0x0123456789abcdefULL;
tctx->b = 0xfedcba9876543210ULL; tctx->b = 0xfedcba9876543210ULL;
tctx->c = 0xf096a5b4c3b2e187ULL; tctx->c = 0xf096a5b4c3b2e187ULL;