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)

3 files changed, 60 insertions, 0 deletions

diff --git a/include/openssl/evp.h b/include/openssl/evp.h
index 3a98e1da9e..e002d63d24 100644
--- a/include/openssl/evp.h
+++ b/include/openssl/evp.h
@@ -717,6 +717,9 @@ const EVP_MD *EVP_ripemd160(void);
 # ifndef OPENSSL_NO_WHIRLPOOL
 const EVP_MD *EVP_whirlpool(void);
 # endif
+# ifndef OPENSSL_NO_SM3
+const EVP_MD *EVP_sm3(void);
+# endif
 const EVP_CIPHER *EVP_enc_null(void); /* does nothing :-) */
 # ifndef OPENSSL_NO_DES
 const EVP_CIPHER *EVP_des_ecb(void);
diff --git a/include/openssl/obj_mac.h b/include/openssl/obj_mac.h
index 02447dcd50..8a9e25284c 100644
--- a/include/openssl/obj_mac.h
+++ b/include/openssl/obj_mac.h
@@ -1132,6 +1132,16 @@
 #define NID_hmacWithSHA1                163
 #define OBJ_hmacWithSHA1                OBJ_rsadsi,2L,7L
 
+#define SN_sm3          "SM3"
+#define LN_sm3          "sm3"
+#define NID_sm3         1143
+#define OBJ_sm3         OBJ_member_body,156L,10197L,1L,401L
+
+#define SN_sm3WithRSAEncryption         "RSA-SM3"
+#define LN_sm3WithRSAEncryption         "sm3WithRSAEncryption"
+#define NID_sm3WithRSAEncryption                1144
+#define OBJ_sm3WithRSAEncryption                OBJ_member_body,156L,10197L,1L,504L
+
 #define LN_hmacWithSHA224               "hmacWithSHA224"
 #define NID_hmacWithSHA224              798
 #define OBJ_hmacWithSHA224              OBJ_rsadsi,2L,8L
diff --git a/include/openssl/sm3.h b/include/openssl/sm3.h
new file mode 100644
index 0000000000..84f8570235
--- /dev/null
+++ b/include/openssl/sm3.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2017 [Ribose Inc.](https://www.ribose.com). 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
+ */
+
+#ifndef HEADER_SM3_H
+# define HEADER_SM3_H
+
+# include <openssl/opensslconf.h>
+
+# ifdef OPENSSL_NO_SM3
+#  error SM3 is disabled.
+# endif
+
+# ifdef  __cplusplus
+extern "C" {
+# endif
+
+#define SM3_DIGEST_LENGTH 32
+#define SM3_WORD unsigned int
+
+# define SM3_CBLOCK      64
+# define SM3_LBLOCK      (SM3_CBLOCK/4)
+
+typedef struct SM3state_st {
+   SM3_WORD A, B, C, D, E, F, G, H;
+   SM3_WORD Nl, Nh;
+   SM3_WORD data[SM3_LBLOCK];
+   unsigned int num;
+} SM3_CTX;
+
+int SM3_Init(SM3_CTX *c);
+int SM3_Update(SM3_CTX *c, const void *data, size_t len);
+int SM3_Final(unsigned char *md, SM3_CTX *c);
+void SM3_Transform(SM3_CTX *c, const unsigned char *data);
+unsigned char *SM3(const unsigned char *d, size_t n, unsigned char *md);
+
+# ifdef  __cplusplus
+}
+# endif
+
+#endif