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: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
crypto/sha3_generic.c | 33 +++++++++++---------
include/crypto/sha3.h | 5 +++
2 files changed, 23 insertions(+), 15 deletions(-)
diff --git a/crypto/sha3_generic.c b/crypto/sha3_generic.c
index 677247d429a1..86db5baafc83 100644
--- a/crypto/sha3_generic.c
+++ b/crypto/sha3_generic.c
@@ -87,7 +87,7 @@ static void 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);
@@ -99,8 +99,9 @@ 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);
@@ -136,8 +137,9 @@ 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;
@@ -162,12 +164,13 @@ 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",
@@ -176,9 +179,9 @@ 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",
@@ -187,9 +190,9 @@ 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",
@@ -198,9 +201,9 @@ 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",
diff --git a/include/crypto/sha3.h b/include/crypto/sha3.h
index 1339dcdbc9b2..080f60c2e6b1 100644
--- a/include/crypto/sha3.h
+++ b/include/crypto/sha3.h
@@ -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
--
2.11.0
