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Commit 6657674b authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Herbert Xu
Browse files

crypto: sha3-generic - export init/update/final routines 



To allow accelerated implementations to fall back to the generic
routines, e.g., in contexts where a SIMD based implementation is
not allowed to run, expose the generic SHA3 init/update/final
routines to other modules.

Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent beeb504a

crypto/sha3_generic.c

+18 −15
Original line number Diff line number Diff line
@@ -145,7 +145,7 @@ static void __attribute__((__optimize__("O3"))) keccakf(u64 st[25]) 
	}

}



static int sha3_init(struct shash_desc *desc)

int crypto_sha3_init(struct shash_desc *desc)

{

	struct sha3_state *sctx = shash_desc_ctx(desc);

	unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
@@ -157,8 +157,9 @@ static int sha3_init(struct shash_desc *desc) 
	memset(sctx->st, 0, sizeof(sctx->st));

	return 0;

}

EXPORT_SYMBOL(crypto_sha3_init);



static int sha3_update(struct shash_desc *desc, const u8 *data,

int crypto_sha3_update(struct shash_desc *desc, const u8 *data,

		       unsigned int len)

{

	struct sha3_state *sctx = shash_desc_ctx(desc);
@@ -194,8 +195,9 @@ static int sha3_update(struct shash_desc *desc, const u8 *data, 


	return 0;

}

EXPORT_SYMBOL(crypto_sha3_update);



static int sha3_final(struct shash_desc *desc, u8 *out)

int crypto_sha3_final(struct shash_desc *desc, u8 *out)

{

	struct sha3_state *sctx = shash_desc_ctx(desc);

	unsigned int i, inlen = sctx->partial;
@@ -220,12 +222,13 @@ static int sha3_final(struct shash_desc *desc, u8 *out) 
	memset(sctx, 0, sizeof(*sctx));

	return 0;

}

EXPORT_SYMBOL(crypto_sha3_final);



static struct shash_alg algs[] = { {

	.digestsize		= SHA3_224_DIGEST_SIZE,

	.init			= sha3_init,

	.update			= sha3_update,

	.final			= sha3_final,

	.init			= crypto_sha3_init,

	.update			= crypto_sha3_update,

	.final			= crypto_sha3_final,

	.descsize		= sizeof(struct sha3_state),

	.base.cra_name		= "sha3-224",

	.base.cra_driver_name	= "sha3-224-generic",
@@ -234,9 +237,9 @@ static struct shash_alg algs[] = { { 
	.base.cra_module	= THIS_MODULE,

}, {

	.digestsize		= SHA3_256_DIGEST_SIZE,

	.init			= sha3_init,

	.update			= sha3_update,

	.final			= sha3_final,

	.init			= crypto_sha3_init,

	.update			= crypto_sha3_update,

	.final			= crypto_sha3_final,

	.descsize		= sizeof(struct sha3_state),

	.base.cra_name		= "sha3-256",

	.base.cra_driver_name	= "sha3-256-generic",
@@ -245,9 +248,9 @@ static struct shash_alg algs[] = { { 
	.base.cra_module	= THIS_MODULE,

}, {

	.digestsize		= SHA3_384_DIGEST_SIZE,

	.init			= sha3_init,

	.update			= sha3_update,

	.final			= sha3_final,

	.init			= crypto_sha3_init,

	.update			= crypto_sha3_update,

	.final			= crypto_sha3_final,

	.descsize		= sizeof(struct sha3_state),

	.base.cra_name		= "sha3-384",

	.base.cra_driver_name	= "sha3-384-generic",
@@ -256,9 +259,9 @@ static struct shash_alg algs[] = { { 
	.base.cra_module	= THIS_MODULE,

}, {

	.digestsize		= SHA3_512_DIGEST_SIZE,

	.init			= sha3_init,

	.update			= sha3_update,

	.final			= sha3_final,

	.init			= crypto_sha3_init,

	.update			= crypto_sha3_update,

	.final			= crypto_sha3_final,

	.descsize		= sizeof(struct sha3_state),

	.base.cra_name		= "sha3-512",

	.base.cra_driver_name	= "sha3-512-generic",

include/crypto/sha3.h

+5 −0
Original line number Diff line number Diff line
@@ -26,4 +26,9 @@ struct sha3_state { 
	u8		buf[SHA3_224_BLOCK_SIZE];

};



int crypto_sha3_init(struct shash_desc *desc);

int crypto_sha3_update(struct shash_desc *desc, const u8 *data,

		       unsigned int len);

int crypto_sha3_final(struct shash_desc *desc, u8 *out);



#endif