linux-kernel - [PATCH v3 1/8] crypto: sm3 - export crypto_sm3

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Date:   Tue,  9 Jun 2020 21:48:48 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     herbert@...dor.apana.org.au, davem@...emloft.net,
        dhowells@...hat.com, mcoquelin.stm32@...il.com,
        alexandre.torgue@...com, jmorris@...ei.org, serge@...lyn.com,
        nramas@...ux.microsoft.com, tusharsu@...ux.microsoft.com,
        zohar@...ux.ibm.com, gilad@...yossef.com, pvanleeuwen@...bus.com
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        keyrings@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-security-module@...r.kernel.org, zhang.jia@...ux.alibaba.com,
        tianjia.zhang@...ux.alibaba.com
Subject: [PATCH v3 1/8] crypto: sm3 - export crypto_sm3_final function

Both crypto_sm3_update and crypto_sm3_finup have been
exported, exporting crypto_sm3_final, to avoid having to
use crypto_sm3_finup(desc, NULL, 0, dgst) to calculate
the hash in some cases.

Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
---
 crypto/sm3_generic.c | 7 ++++---
 include/crypto/sm3.h | 2 ++
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/crypto/sm3_generic.c b/crypto/sm3_generic.c
index 3468975215ca..193c4584bd00 100644
--- a/crypto/sm3_generic.c
+++ b/crypto/sm3_generic.c
@@ -149,17 +149,18 @@ int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
 }
 EXPORT_SYMBOL(crypto_sm3_update);
 
-static int sm3_final(struct shash_desc *desc, u8 *out)
+int crypto_sm3_final(struct shash_desc *desc, u8 *out)
 {
 	sm3_base_do_finalize(desc, sm3_generic_block_fn);
 	return sm3_base_finish(desc, out);
 }
+EXPORT_SYMBOL(crypto_sm3_final);
 
 int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
 			unsigned int len, u8 *hash)
 {
 	sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
-	return sm3_final(desc, hash);
+	return crypto_sm3_final(desc, hash);
 }
 EXPORT_SYMBOL(crypto_sm3_finup);
 
@@ -167,7 +168,7 @@ static struct shash_alg sm3_alg = {
 	.digestsize	=	SM3_DIGEST_SIZE,
 	.init		=	sm3_base_init,
 	.update		=	crypto_sm3_update,
-	.final		=	sm3_final,
+	.final		=	crypto_sm3_final,
 	.finup		=	crypto_sm3_finup,
 	.descsize	=	sizeof(struct sm3_state),
 	.base		=	{
diff --git a/include/crypto/sm3.h b/include/crypto/sm3.h
index 1438942dc773..42ea21289ba9 100644
--- a/include/crypto/sm3.h
+++ b/include/crypto/sm3.h
@@ -35,6 +35,8 @@ struct shash_desc;
 extern int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
 			      unsigned int len);
 
+extern int crypto_sm3_final(struct shash_desc *desc, u8 *out);
+
 extern int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
 			     unsigned int len, u8 *hash);
 #endif
-- 
2.17.1