From a0c3e4fa9089f571ff4b406cb914d0a504847b10 Mon Sep 17 00:00:00 2001
From: Jack Lloyd <jack.lloyd@ribose.com>
Date: Wed, 25 Oct 2017 13:19:02 -0400
Subject: SM3: Add SM3 hash function

SM3 is a secure hash function which is part of the Chinese
"Commercial Cryptography" suite of algorithms which use is
required for certain commercial applications in China.

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4616)
---
 crypto/evp/build.info |  2 +-
 crypto/evp/c_alld.c   |  3 +++
 crypto/evp/m_sm3.c    | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 crypto/evp/m_sm3.c

(limited to 'crypto/evp')

diff --git a/crypto/evp/build.info b/crypto/evp/build.info
index 0305738011..96b44efbfb 100644
--- a/crypto/evp/build.info
+++ b/crypto/evp/build.info
@@ -5,7 +5,7 @@ SOURCE[../../libcrypto]=\
         e_rc4.c e_aes.c names.c e_seed.c e_aria.c e_sm4.c \
         e_xcbc_d.c e_rc2.c e_cast.c e_rc5.c \
         m_null.c m_md2.c m_md4.c m_md5.c m_sha1.c m_wp.c \
-        m_md5_sha1.c m_mdc2.c m_ripemd.c m_sha3.c \
+        m_md5_sha1.c m_mdc2.c m_ripemd.c m_sha3.c m_sm3.c \
         p_open.c p_seal.c p_sign.c p_verify.c p_lib.c p_enc.c p_dec.c \
         bio_md.c bio_b64.c bio_enc.c evp_err.c e_null.c \
         c_allc.c c_alld.c evp_lib.c bio_ok.c \
diff --git a/crypto/evp/c_alld.c b/crypto/evp/c_alld.c
index 088f65cd80..257d405ba7 100644
--- a/crypto/evp/c_alld.c
+++ b/crypto/evp/c_alld.c
@@ -42,6 +42,9 @@ void openssl_add_all_digests_int(void)
 #ifndef OPENSSL_NO_WHIRLPOOL
     EVP_add_digest(EVP_whirlpool());
 #endif
+#ifndef OPENSSL_NO_SM3
+    EVP_add_digest(EVP_sm3());
+#endif
 #ifndef OPENSSL_NO_BLAKE2
     EVP_add_digest(EVP_blake2b512());
     EVP_add_digest(EVP_blake2s256());
diff --git a/crypto/evp/m_sm3.c b/crypto/evp/m_sm3.c
new file mode 100644
index 0000000000..21ee1de136
--- /dev/null
+++ b/crypto/evp/m_sm3.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2017 Ribose Inc. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+
+#ifndef OPENSSL_NO_SM3
+
+# include <openssl/evp.h>
+# include <openssl/objects.h>
+# include <openssl/sm3.h>
+# include "internal/evp_int.h"
+
+static int init(EVP_MD_CTX *ctx)
+{
+    return SM3_Init(EVP_MD_CTX_md_data(ctx));
+}
+
+static int update(EVP_MD_CTX *ctx, const void *data, size_t count)
+{
+    return SM3_Update(EVP_MD_CTX_md_data(ctx), data, count);
+}
+
+static int final(EVP_MD_CTX *ctx, unsigned char *md)
+{
+    return SM3_Final(md, EVP_MD_CTX_md_data(ctx));
+}
+
+static const EVP_MD sm3_md = {
+    NID_sm3,
+    NID_sm3WithRSAEncryption,
+    SM3_DIGEST_LENGTH,
+    0,
+    init,
+    update,
+    final,
+    NULL,
+    NULL,
+    SM3_CBLOCK,
+    sizeof(EVP_MD *) + sizeof(SM3_CTX),
+};
+
+const EVP_MD *EVP_sm3(void)
+{
+    return &sm3_md;
+}
+#endif
+
-- 
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