From 78cb95d8fbd76159c1162c4ff72643f2c9984bf6 Mon Sep 17 00:00:00 2001
From: zhujianwei001 <zhujianwei7@huawei.com>
Date: Fri, 13 Aug 2021 08:51:20 +0800
Subject: [PATCH] add support sm3 md
Reference: https://github.com/gpg/libgcrypt/commit/4423bf3cc4432b9bfe801ff74cb05e6f0dd3eccd#diff-4cfeaaa70bbeb65cd0cbb0bec58738e97bd585f3acb1f6ddc63cfa3a9abeb5dd
Conflict: fetch sm3.c from 1.9.3 tag, but remove _gcry_sm3_hash_buffer, _gcry_sm3_hash_buffers in struct _gcry_digest_spec_sm3, adjust hd->bctx.blocksize init in sm3_init; add some build support

Add crypto hash SM3.
* configure.ac (available_digests): Add sm3.
* src/cipher.h: Add declarations for SM3.
* cipher/Makefile.am (EXTRA_libcipher_la_SOURCES): Add sm3.c.
* cipher/md.c [USE_SM3] (digest_list): Add _gcry_digest_spec_sm3.
* cipher/pubkey-util.c (hashnames): Add "sm3".
* cipher/sm3.c: New.
* tests/basic.c (check_digests): Add test vectors for SM3.
* tests/hashtest-256g.in (algos): Add SM3.
* tests/hashtest.c (testvectors): Add for SM3.
--
GnuPG-bug-id: 3454
Signed-off-by: Jia Zhang <qianyue.zj@alibaba-inc.com>
---
 cipher/Makefile.am     |   1 +
 cipher/md.c            |  11 +
 cipher/pubkey-util.c   |   1 +
 cipher/sm3.c           | 472 +++++++++++++++++++++++++++++++++++++++++
 configure.ac           |   7 +
 doc/gcrypt.texi        |   4 +
 src/cipher.h           |   7 +
 src/gcrypt.h.in        |   3 +-
 tests/basic.c          |  25 +++
 tests/hashtest-256g.in |   2 +-
 tests/hashtest.c       |  11 +
 11 files changed, 542 insertions(+), 2 deletions(-)
 create mode 100644 cipher/sm3.c
diff --git a/cipher/Makefile.am b/cipher/Makefile.am
index 85a5b5f..d44dfea 100644
--- a/cipher/Makefile.am
+++ b/cipher/Makefile.am
@@ -97,6 +97,7 @@ sha256.c sha256-ssse3-amd64.S sha256-avx-amd64.S sha256-avx2-bmi2-amd64.S \
   sha256-armv8-aarch32-ce.S sha256-armv8-aarch64-ce.S \
 sha512.c sha512-ssse3-amd64.S sha512-avx-amd64.S sha512-avx2-bmi2-amd64.S \
   sha512-armv7-neon.S sha512-arm.S \
+sm3.c \
 keccak.c keccak_permute_32.h keccak_permute_64.h keccak-armv7-neon.S \
 stribog.c \
 tiger.c \
diff --git a/cipher/md.c b/cipher/md.c
index 0d07854..13e3b3e 100644
--- a/cipher/md.c
+++ b/cipher/md.c
@@ -94,6 +94,9 @@ static gcry_md_spec_t *digest_list[] =
      &_gcry_digest_spec_blake2s_224,
      &_gcry_digest_spec_blake2s_160,
      &_gcry_digest_spec_blake2s_128,
+#endif
+#if USE_SM3
+     &_gcry_digest_spec_sm3,
 #endif
      NULL
   };
@@ -1042,6 +1045,10 @@ _gcry_md_hash_buffer (int algo, void *digest,
 #if USE_RMD160
   else if (algo == GCRY_MD_RMD160 && !fips_mode () )
     _gcry_rmd160_hash_buffer (digest, buffer, length);
+#endif
+#if USE_SM3
+  else if (algo == GCRY_MD_SM3)
+    _gcry_sm3_hash_buffer (digest, buffer, length);
 #endif
   else
     {
@@ -1115,6 +1122,10 @@ _gcry_md_hash_buffers (int algo, unsigned int flags, void *digest,
 #if USE_SHA1
   else if (algo == GCRY_MD_SHA1 && !hmac)
     _gcry_sha1_hash_buffers (digest, iov, iovcnt);
+#endif
+#if USE_SM3
+  else if (algo == GCRY_MD_SM3 && !hmac)
+    _gcry_sm3_hash_buffers (digest, iov, iovcnt);
 #endif
   else
     {
diff --git a/cipher/pubkey-util.c b/cipher/pubkey-util.c
index c40ef97..ae0e1c4 100644
--- a/cipher/pubkey-util.c
+++ b/cipher/pubkey-util.c
@@ -221,6 +221,7 @@ get_hash_algo (const char *s, size_t n)
     { "sha3-256", GCRY_MD_SHA3_256 },
     { "sha3-384", GCRY_MD_SHA3_384 },
     { "sha3-512", GCRY_MD_SHA3_512 },
+    { "sm3", GCRY_MD_SM3 },
     { NULL, 0 }
   };
   int algo;
diff --git a/cipher/sm3.c b/cipher/sm3.c
new file mode 100644
index 0000000..274b14e
--- /dev/null
+++ b/cipher/sm3.c
@@ -0,0 +1,472 @@
+/* sm3.c - SM3 hash function
+ * Copyright (C) 2017 Jia Zhang
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+/*  Test vectors:
+ *
+ *  "abc"
+ *  SM3: 66c7f0f4 62eeedd9 d1f2d46b dc10e4e2 4167c487 5cf2f7a2 297da02b 8f4ba8e0
+ *
+ *  "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd"
+ *  SM3: debe9ff9 2275b8a1 38604889 c18e5a4d 6fdb70e5 387e5765 293dcba3 9c0c5732
+ *
+ *  "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
+ *  SM3: 639b6cc5 e64d9e37 a390b192 df4fa1ea 0720ab74 7ff692b9 f38c4e66 ad7b8c05
+ *
+ *  "a" one million times
+ *  SM3: c8aaf894 29554029 e231941a 2acc0ad6 1ff2a5ac d8fadd25 847a3a73 2b3b02c3
+ *
+ */
+
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "g10lib.h"
+#include "bithelp.h"
+#include "bufhelp.h"
+#include "cipher.h"
+#include "hash-common.h"
+
+
+typedef struct {
+  gcry_md_block_ctx_t bctx;
+  u32  h0,h1,h2,h3,h4,h5,h6,h7;
+} SM3_CONTEXT;
+
+
+static unsigned int
+transform (void *c, const unsigned char *data, size_t nblks);
+
+
+static void
+sm3_init (void *context, unsigned int flags)
+{
+  SM3_CONTEXT *hd = context;
+  unsigned int features = _gcry_get_hw_features ();
+
+  (void)flags;
+
+  hd->h0 = 0x7380166f;
+  hd->h1 = 0x4914b2b9;
+  hd->h2 = 0x172442d7;
+  hd->h3 = 0xda8a0600;
+  hd->h4 = 0xa96f30bc;
+  hd->h5 = 0x163138aa;
+  hd->h6 = 0xe38dee4d;
+  hd->h7 = 0xb0fb0e4e;
+
+  hd->bctx.nblocks = 0;
+  hd->bctx.nblocks_high = 0;
+  hd->bctx.count = 0;
+  hd->bctx.blocksize = 64;
+  hd->bctx.bwrite = transform;
+
+  (void)features;
+}
+
+
+/*
+ *   Transform the message X which consists of 16 32-bit-words. See
+ *   GM/T 004-2012 for details.  */
+#define R(i,a,b,c,d,e,f,g,h,t,w1,w2) do                               \
+          {                                                           \
+            ss1 = rol ((rol ((a), 12) + (e) + (t)), 7);               \
+            ss2 = ss1 ^ rol ((a), 12);                                \
+            d += FF##i(a,b,c) + ss2 + ((w1) ^ (w2));                  \
+            h += GG##i(e,f,g) + ss1 + (w1);                           \
+            b = rol ((b), 9);                                         \
+            f = rol ((f), 19);                                        \
+            h = P0 ((h));                                             \
+          } while (0)
+
+#define R1(a,b,c,d,e,f,g,h,t,w1,w2) R(1,a,b,c,d,e,f,g,h,t,w1,w2)
+#define R2(a,b,c,d,e,f,g,h,t,w1,w2) R(2,a,b,c,d,e,f,g,h,t,w1,w2)
+
+#define FF1(x, y, z)  (x ^ y ^ z)
+
+#define FF2(x, y, z)  ((x & y) | (x & z) | (y & z))
+
+#define GG1(x, y, z)  (x ^ y ^ z)
+
+#define GG2(x, y, z)  ((x & y) | ( ~x & z))
+
+/* Message expansion */
+#define P0(x) ((x) ^ rol ((x), 9) ^ rol ((x), 17))
+#define P1(x) ((x) ^ rol ((x), 15) ^ rol ((x), 23))
+#define I(i)  ( w[i] = buf_get_be32(data + i * 4) )
+#define W1(i) ( w[i&0x0f] )
+#define W2(i) ( w[i&0x0f] =   P1(w[i    &0x0f] \
+                               ^ w[(i-9)&0x0f] \
+                               ^ rol (w[(i-3)&0x0f], 15)) \
+                            ^ rol (w[(i-13)&0x0f], 7) \
+                            ^ w[(i-6)&0x0f] )
+
+static unsigned int
+transform_blk (void *ctx, const unsigned char *data)
+{
+  SM3_CONTEXT *hd = ctx;
+  static const u32 K[64] = {
+    0x79cc4519, 0xf3988a32, 0xe7311465, 0xce6228cb,
+    0x9cc45197, 0x3988a32f, 0x7311465e, 0xe6228cbc,
+    0xcc451979, 0x988a32f3, 0x311465e7, 0x6228cbce,
+    0xc451979c, 0x88a32f39, 0x11465e73, 0x228cbce6,
+    0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c,
+    0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce,
+    0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec,
+    0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5,
+    0x7a879d8a, 0xf50f3b14, 0xea1e7629, 0xd43cec53,
+    0xa879d8a7, 0x50f3b14f, 0xa1e7629e, 0x43cec53d,
+    0x879d8a7a, 0x0f3b14f5, 0x1e7629ea, 0x3cec53d4,
+    0x79d8a7a8, 0xf3b14f50, 0xe7629ea1, 0xcec53d43,
+    0x9d8a7a87, 0x3b14f50f, 0x7629ea1e, 0xec53d43c,
+    0xd8a7a879, 0xb14f50f3, 0x629ea1e7, 0xc53d43ce,
+    0x8a7a879d, 0x14f50f3b, 0x29ea1e76, 0x53d43cec,
+    0xa7a879d8, 0x4f50f3b1, 0x9ea1e762, 0x3d43cec5
+  };
+
+  u32 a,b,c,d,e,f,g,h,ss1,ss2;
+  u32 w[16];
+
+  a = hd->h0;
+  b = hd->h1;
+  c = hd->h2;
+  d = hd->h3;
+  e = hd->h4;
+  f = hd->h5;
+  g = hd->h6;
+  h = hd->h7;
+
+  R1(a, b, c, d, e, f, g, h, K[0], I(0), I(4));
+  R1(d, a, b, c, h, e, f, g, K[1], I(1), I(5));
+  R1(c, d, a, b, g, h, e, f, K[2], I(2), I(6));
+  R1(b, c, d, a, f, g, h, e, K[3], I(3), I(7));
+  R1(a, b, c, d, e, f, g, h, K[4], W1(4), I(8));
+  R1(d, a, b, c, h, e, f, g, K[5], W1(5), I(9));
+  R1(c, d, a, b, g, h, e, f, K[6], W1(6), I(10));
+  R1(b, c, d, a, f, g, h, e, K[7], W1(7), I(11));
+  R1(a, b, c, d, e, f, g, h, K[8], W1(8), I(12));
+  R1(d, a, b, c, h, e, f, g, K[9], W1(9), I(13));
+  R1(c, d, a, b, g, h, e, f, K[10], W1(10), I(14));
+  R1(b, c, d, a, f, g, h, e, K[11], W1(11), I(15));
+  R1(a, b, c, d, e, f, g, h, K[12], W1(12), W2(16));
+  R1(d, a, b, c, h, e, f, g, K[13], W1(13), W2(17));
+  R1(c, d, a, b, g, h, e, f, K[14], W1(14), W2(18));
+  R1(b, c, d, a, f, g, h, e, K[15], W1(15), W2(19));
+
+  R2(a, b, c, d, e, f, g, h, K[16], W1(16), W2(20));
+  R2(d, a, b, c, h, e, f, g, K[17], W1(17), W2(21));
+  R2(c, d, a, b, g, h, e, f, K[18], W1(18), W2(22));
+  R2(b, c, d, a, f, g, h, e, K[19], W1(19), W2(23));
+  R2(a, b, c, d, e, f, g, h, K[20], W1(20), W2(24));
+  R2(d, a, b, c, h, e, f, g, K[21], W1(21), W2(25));
+  R2(c, d, a, b, g, h, e, f, K[22], W1(22), W2(26));
+  R2(b, c, d, a, f, g, h, e, K[23], W1(23), W2(27));
+  R2(a, b, c, d, e, f, g, h, K[24], W1(24), W2(28));
+  R2(d, a, b, c, h, e, f, g, K[25], W1(25), W2(29));
+  R2(c, d, a, b, g, h, e, f, K[26], W1(26), W2(30));
+  R2(b, c, d, a, f, g, h, e, K[27], W1(27), W2(31));
+  R2(a, b, c, d, e, f, g, h, K[28], W1(28), W2(32));
+  R2(d, a, b, c, h, e, f, g, K[29], W1(29), W2(33));
+  R2(c, d, a, b, g, h, e, f, K[30], W1(30), W2(34));
+  R2(b, c, d, a, f, g, h, e, K[31], W1(31), W2(35));
+
+  R2(a, b, c, d, e, f, g, h, K[32], W1(32), W2(36));
+  R2(d, a, b, c, h, e, f, g, K[33], W1(33), W2(37));
+  R2(c, d, a, b, g, h, e, f, K[34], W1(34), W2(38));
+  R2(b, c, d, a, f, g, h, e, K[35], W1(35), W2(39));
+  R2(a, b, c, d, e, f, g, h, K[36], W1(36), W2(40));
+  R2(d, a, b, c, h, e, f, g, K[37], W1(37), W2(41));
+  R2(c, d, a, b, g, h, e, f, K[38], W1(38), W2(42));
+  R2(b, c, d, a, f, g, h, e, K[39], W1(39), W2(43));
+  R2(a, b, c, d, e, f, g, h, K[40], W1(40), W2(44));
+  R2(d, a, b, c, h, e, f, g, K[41], W1(41), W2(45));
+  R2(c, d, a, b, g, h, e, f, K[42], W1(42), W2(46));
+  R2(b, c, d, a, f, g, h, e, K[43], W1(43), W2(47));
+  R2(a, b, c, d, e, f, g, h, K[44], W1(44), W2(48));
+  R2(d, a, b, c, h, e, f, g, K[45], W1(45), W2(49));
+  R2(c, d, a, b, g, h, e, f, K[46], W1(46), W2(50));
+  R2(b, c, d, a, f, g, h, e, K[47], W1(47), W2(51));
+
+  R2(a, b, c, d, e, f, g, h, K[48], W1(48), W2(52));
+  R2(d, a, b, c, h, e, f, g, K[49], W1(49), W2(53));
+  R2(c, d, a, b, g, h, e, f, K[50], W1(50), W2(54));
+  R2(b, c, d, a, f, g, h, e, K[51], W1(51), W2(55));
+  R2(a, b, c, d, e, f, g, h, K[52], W1(52), W2(56));
+  R2(d, a, b, c, h, e, f, g, K[53], W1(53), W2(57));
+  R2(c, d, a, b, g, h, e, f, K[54], W1(54), W2(58));
+  R2(b, c, d, a, f, g, h, e, K[55], W1(55), W2(59));
+  R2(a, b, c, d, e, f, g, h, K[56], W1(56), W2(60));
+  R2(d, a, b, c, h, e, f, g, K[57], W1(57), W2(61));
+  R2(c, d, a, b, g, h, e, f, K[58], W1(58), W2(62));
+  R2(b, c, d, a, f, g, h, e, K[59], W1(59), W2(63));
+  R2(a, b, c, d, e, f, g, h, K[60], W1(60), W2(64));
+  R2(d, a, b, c, h, e, f, g, K[61], W1(61), W2(65));
+  R2(c, d, a, b, g, h, e, f, K[62], W1(62), W2(66));
+  R2(b, c, d, a, f, g, h, e, K[63], W1(63), W2(67));
+
+  hd->h0 ^= a;
+  hd->h1 ^= b;
+  hd->h2 ^= c;
+  hd->h3 ^= d;
+  hd->h4 ^= e;
+  hd->h5 ^= f;
+  hd->h6 ^= g;
+  hd->h7 ^= h;
+
+  return /*burn_stack*/ 26*4+32;
+}
+#undef P0
+#undef P1
+#undef R
+#undef R1
+#undef R2
+
+static unsigned int
+transform (void *ctx, const unsigned char *data, size_t nblks)
+{
+  SM3_CONTEXT *hd = ctx;
+  unsigned int burn;
+
+  do
+    {
+      burn = transform_blk (hd, data);
+      data += 64;
+    }
+  while (--nblks);
+
+  return burn;
+}
+
+
+/*
+ *    The routine finally terminates the computation and returns the
+ *    digest.  The handle is prepared for a new cycle, but adding bytes
+ *    to the handle will the destroy the returned buffer.  Returns: 32
+ *    bytes with the message the digest.  */
+static void
+sm3_final(void *context)
+{
+  SM3_CONTEXT *hd = context;
+  u32 t, th, msb, lsb;
+  byte *p;
+  unsigned int burn;
+
+  t = hd->bctx.nblocks;
+  if (sizeof t == sizeof hd->bctx.nblocks)
+    th = hd->bctx.nblocks_high;
+  else
+    th = hd->bctx.nblocks >> 32;
+
+  /* multiply by 64 to make a byte count */
+  lsb = t << 6;
+  msb = (th << 6) | (t >> 26);
+  /* add the count */
+  t = lsb;
+  if ((lsb += hd->bctx.count) < t)
+    msb++;
+  /* multiply by 8 to make a bit count */
+  t = lsb;
+  lsb <<= 3;
+  msb <<= 3;
+  msb |= t >> 29;
+
+  if (hd->bctx.count < 56)  /* enough room */
+    {
+      hd->bctx.buf[hd->bctx.count++] = 0x80; /* pad */
+      if (hd->bctx.count < 56)
+	memset (&hd->bctx.buf[hd->bctx.count], 0, 56 - hd->bctx.count);
+
+      /* append the 64 bit count */
+      buf_put_be32(hd->bctx.buf + 56, msb);
+      buf_put_be32(hd->bctx.buf + 60, lsb);
+      burn = (*hd->bctx.bwrite) ( hd, hd->bctx.buf, 1 );
+    }
+  else  /* need one extra block */
+    {
+      hd->bctx.buf[hd->bctx.count++] = 0x80; /* pad character */
+      /* fill pad and next block with zeroes */
+      memset (&hd->bctx.buf[hd->bctx.count], 0, 64 - hd->bctx.count + 56);
+
+      /* append the 64 bit count */
+      buf_put_be32(hd->bctx.buf + 64 + 56, msb);
+      buf_put_be32(hd->bctx.buf + 64 + 60, lsb);
+      burn = (*hd->bctx.bwrite) ( hd, hd->bctx.buf, 2 );
+    }
+
+  p = hd->bctx.buf;
+#define X(a) do { buf_put_be32(p, hd->h##a); p += 4; } while(0)
+  X(0);
+  X(1);
+  X(2);
+  X(3);
+  X(4);
+  X(5);
+  X(6);
+  X(7);
+#undef X
+
+  hd->bctx.count = 0;
+
+  _gcry_burn_stack (burn);
+}
+
+static byte *
+sm3_read (void *context)
+{
+  SM3_CONTEXT *hd = context;
+
+  return hd->bctx.buf;
+}
+
+
+/* Shortcut functions which puts the hash value of the supplied buffer
+ * into outbuf which must have a size of 32 bytes.  */
+void
+_gcry_sm3_hash_buffer (void *outbuf, const void *buffer, size_t length)
+{
+  SM3_CONTEXT hd;
+
+  sm3_init (&hd, 0);
+  _gcry_md_block_write (&hd, buffer, length);
+  sm3_final (&hd);
+  memcpy (outbuf, hd.bctx.buf, 32);
+}
+
+
+/* Variant of the above shortcut function using multiple buffers.  */
+void
+_gcry_sm3_hash_buffers (void *outbuf, const gcry_buffer_t *iov, int iovcnt)
+{
+  SM3_CONTEXT hd;
+
+  sm3_init (&hd, 0);
+  for (;iovcnt > 0; iov++, iovcnt--)
+    _gcry_md_block_write (&hd,
+                          (const char*)iov[0].data + iov[0].off, iov[0].len);
+  sm3_final (&hd);
+  memcpy (outbuf, hd.bctx.buf, 32);
+}
+
+
+
+/*
+ *      Self-test section.
+ */
+
+
+static gpg_err_code_t
+selftests_sm3 (int extended, selftest_report_func_t report)
+{
+  const char *what;
+  const char *errtxt;
+
+  what = "short string (spec example 1)";
+  errtxt = _gcry_hash_selftest_check_one
+    (GCRY_MD_SM3, 0,
+     "abc", 3,
+     "\x66\xc7\xf0\xf4\x62\xee\xed\xd9\xd1\xf2\xd4\x6b\xdc\x10\xe4\xe2"
+     "\x41\x67\xc4\x87\x5c\xf2\xf7\xa2\x29\x7d\xa0\x2b\x8f\x4b\xa8\xe0", 32);
+  if (errtxt)
+    goto failed;
+
+  if (extended)
+    {
+      what = "long string (spec example 2)";
+      errtxt = _gcry_hash_selftest_check_one
+        (GCRY_MD_SM3, 0,
+         "abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd", 64,
+         "\xde\xbe\x9f\xf9\x22\x75\xb8\xa1\x38\x60\x48\x89\xc1\x8e\x5a\x4d"
+         "\x6f\xdb\x70\xe5\x38\x7e\x57\x65\x29\x3d\xcb\xa3\x9c\x0c\x57\x32",
+         32);
+      if (errtxt)
+        goto failed;
+
+      what = "long string";
+      errtxt = _gcry_hash_selftest_check_one
+        (GCRY_MD_SM3, 0,
+         "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56,
+         "\x63\x9b\x6c\xc5\xe6\x4d\x9e\x37\xa3\x90\xb1\x92\xdf\x4f\xa1\xea"
+         "\x07\x20\xab\x74\x7f\xf6\x92\xb9\xf3\x8c\x4e\x66\xad\x7b\x8c\x05",
+         32);
+      if (errtxt)
+        goto failed;
+
+      what = "one million \"a\"";
+      errtxt = _gcry_hash_selftest_check_one
+        (GCRY_MD_SM3, 1,
+         NULL, 0,
+         "\xc8\xaa\xf8\x94\x29\x55\x40\x29\xe2\x31\x94\x1a\x2a\xcc\x0a\xd6"
+         "\x1f\xf2\xa5\xac\xd8\xfa\xdd\x25\x84\x7a\x3a\x73\x2b\x3b\x02\xc3",
+         32);
+      if (errtxt)
+        goto failed;
+    }
+
+  return 0; /* Succeeded. */
+
+ failed:
+  if (report)
+    report ("digest", GCRY_MD_SM3, what, errtxt);
+  return GPG_ERR_SELFTEST_FAILED;
+}
+
+
+/* Run a full self-test for ALGO and return 0 on success.  */
+static gpg_err_code_t
+run_selftests (int algo, int extended, selftest_report_func_t report)
+{
+  gpg_err_code_t ec;
+
+  switch (algo)
+    {
+    case GCRY_MD_SM3:
+      ec = selftests_sm3 (extended, report);
+      break;
+    default:
+      ec = GPG_ERR_DIGEST_ALGO;
+      break;
+
+    }
+  return ec;
+}
+
+static byte asn_sm3[] = /* Object ID is 1.2.156.10197.401 */
+  { 0x30, 0x2F, 0x30, 0x0B, 0x06, 0x07, 0x2A, 0x81,
+    0x1C, 0xCF, 0x55, 0x83, 0x11, 0x05, 0x00, 0x04,
+    0x20 };
+
+static gcry_md_oid_spec_t oid_spec_sm3[] =
+  {
+    /* China Electronics Standardization Instutute,
+       OID White paper (2015), Table 6 */
+    { "1.2.156.10197.401" },
+    { NULL },
+  };
+
+gcry_md_spec_t _gcry_digest_spec_sm3 =
+  {
+    GCRY_MD_SM3, {0, 0},
+    "SM3", asn_sm3, DIM (asn_sm3), oid_spec_sm3, 32,
+    sm3_init, _gcry_md_block_write, sm3_final, sm3_read, NULL,
+    sizeof (SM3_CONTEXT),
+    run_selftests
+  };
diff --git a/configure.ac b/configure.ac
index c588af4..d52b61f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -204,6 +204,7 @@ enabled_pubkey_ciphers=""
 # Definitions for message digests.
 available_digests="crc gostr3411-94 md2 md4 md5 rmd160 sha1 sha256 sha512"
 available_digests="$available_digests sha3 tiger whirlpool stribog blake2"
+available_digests="$available_digests sm3"
 enabled_digests=""
 
 # Definitions for kdfs (optional ones)
@@ -2603,6 +2604,12 @@ case "${host}" in
   ;;
 esac
 
+LIST_MEMBER(sm3, $enabled_digests)
+if test "$found" = "1" ; then
+   GCRYPT_DIGESTS="$GCRYPT_DIGESTS sm3.lo"
+   AC_DEFINE(USE_SM3, 1, [Defined if this module should be included])
+fi
+
 LIST_MEMBER(scrypt, $enabled_kdfs)
 if test "$found" = "1" ; then
    GCRYPT_KDFS="$GCRYPT_KDFS scrypt.lo"
diff --git a/doc/gcrypt.texi b/doc/gcrypt.texi
index 7cd1b0f..8119e89 100644
--- a/doc/gcrypt.texi
+++ b/doc/gcrypt.texi
@@ -3122,6 +3122,7 @@ are also supported.
 @cindex MD2, MD4, MD5
 @cindex TIGER, TIGER1, TIGER2
 @cindex HAVAL
+@cindex SM3
 @cindex Whirlpool
 @cindex BLAKE2b-512, BLAKE2b-384, BLAKE2b-256, BLAKE2b-160
 @cindex BLAKE2s-256, BLAKE2s-224, BLAKE2s-160, BLAKE2s-128
@@ -3281,6 +3282,9 @@ See RFC 7693 for the specification.
 This is the BLAKE2s-128 algorithm which yields a message digest of 16 bytes.
 See RFC 7693 for the specification.
 
+@item GCRY_MD_SM3
+This is the SM3 algorithm which yields a message digest of 32 bytes.
+
 @end table
 @c end table of hash algorithms
 
diff --git a/src/cipher.h b/src/cipher.h
index d9e0ac6..7c2e5d9 100644
--- a/src/cipher.h
+++ b/src/cipher.h
@@ -133,6 +133,12 @@ void _gcry_sha512_hash_buffer (void *outbuf,
 void _gcry_sha512_hash_buffers (void *outbuf,
                                 const gcry_buffer_t *iov, int iovcnt);
 
+/*-- sm3.c --*/
+void _gcry_sm3_hash_buffer (void *outbuf,
+                            const void *buffer, size_t length);
+void _gcry_sm3_hash_buffers (void *outbuf,
+                             const gcry_buffer_t *iov, int iovcnt);
+
 /*-- blake2.c --*/
 gcry_err_code_t _gcry_blake2_init_with_key(void *ctx, unsigned int flags,
 					   const unsigned char *key,
@@ -329,6 +335,7 @@ extern gcry_md_spec_t _gcry_digest_spec_blake2s_256;
 extern gcry_md_spec_t _gcry_digest_spec_blake2s_224;
 extern gcry_md_spec_t _gcry_digest_spec_blake2s_160;
 extern gcry_md_spec_t _gcry_digest_spec_blake2s_128;
+extern gcry_md_spec_t _gcry_digest_spec_sm3;
 
 /* Declarations for the pubkey cipher specifications.  */
 extern gcry_pk_spec_t _gcry_pubkey_spec_rsa;
diff --git a/src/gcrypt.h.in b/src/gcrypt.h.in
index 75c49a0..72b09a9 100644
--- a/src/gcrypt.h.in
+++ b/src/gcrypt.h.in
@@ -1240,7 +1240,8 @@ enum gcry_md_algos
     GCRY_MD_BLAKE2S_256   = 322,
     GCRY_MD_BLAKE2S_224   = 323,
     GCRY_MD_BLAKE2S_160   = 324,
-    GCRY_MD_BLAKE2S_128   = 325
+    GCRY_MD_BLAKE2S_128   = 325,
+    GCRY_MD_SM3           = 326,
   };
 
 /* Flags used with the open function.  */
diff --git a/tests/basic.c b/tests/basic.c
index 0bd8020..f932b2b 100644
--- a/tests/basic.c
+++ b/tests/basic.c
@@ -8457,6 +8457,31 @@ check_digests (void)
 	"\x0e\xfc\x29\xde" },
       { GCRY_MD_BLAKE2S_128, "?",
 	"\x70\x0b\x8a\x71\x1d\x34\x0a\xf0\x13\x93\x19\x93\x5e\xd7\x54\x9c" },
+
+      { GCRY_MD_SM3, "abc",
+	"\x66\xc7\xf0\xf4\x62\xee\xed\xd9\xd1\xf2\xd4\x6b\xdc\x10\xe4\xe2"
+	"\x41\x67\xc4\x87\x5c\xf2\xf7\xa2\x29\x7d\xa0\x2b\x8f\x4b\xa8\xe0" },
+      { GCRY_MD_SM3,
+	"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+	"\x63\x9b\x6c\xc5\xe6\x4d\x9e\x37\xa3\x90\xb1\x92\xdf\x4f\xa1\xea"
+	"\x07\x20\xab\x74\x7f\xf6\x92\xb9\xf3\x8c\x4e\x66\xad\x7b\x8c\x05" },
+      { GCRY_MD_SM3, "!",
+	"\xc8\xaa\xf8\x94\x29\x55\x40\x29\xe2\x31\x94\x1a\x2a\xcc\x0a\xd6"
+	"\x1f\xf2\xa5\xac\xd8\xfa\xdd\x25\x84\x7a\x3a\x73\x2b\x3b\x02\xc3" },
+      { GCRY_MD_SM3, "?",
+	"\x3a\x3f\x53\xfc\x96\xc2\xde\xb2\xd9\x12\x3a\x1b\xd8\x47\x71\x28"
+	"\xbc\x5d\x5e\x94\xea\x08\x86\x3d\xfb\xe4\x00\x5a\xd9\xed\x79\x26" },
+      { GCRY_MD_SM3,
+	"Libgcrypt is free software; you can redistribute it and/or modif"
+	"y it under the terms of the GNU Lesser general Public License as"
+	" published by the Free Software Foundation; either version 2.1 o"
+	"f the License, or (at your option) any later version.\nLibgcrypt"
+	" is distributed in the hope that it will be useful, but WITHOUT "
+	"ANY WARRANTY; without even the implied warranty of MERCHANTABILI"
+	"TY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser Gene"
+	"ral Public License for more details.",
+	"\x8b\x91\x3f\x0e\x85\xae\x43\x25\x6d\x28\x38\x6c\x09\x5c\xc7\x72"
+	"\xcc\x2e\x78\x89\x7e\x2e\x4e\x5a\x3d\xf6\x55\xfe\x87\xbe\xa6\xbc" },
       { 0 }
     };
   gcry_error_t err;
diff --git a/tests/hashtest-256g.in b/tests/hashtest-256g.in
index 92b1c1b..a52b869 100755
--- a/tests/hashtest-256g.in
+++ b/tests/hashtest-256g.in
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-algos="SHA1 SHA256 SHA512"
+algos="SHA1 SHA256 SHA512 SM3"
 
 test "@RUN_LARGE_DATA_TESTS@" = yes || exit 77
 echo "      now running 256 GiB tests for $algos - this takes looong"
diff --git a/tests/hashtest.c b/tests/hashtest.c
index 2ecbc1f..3394594 100644
--- a/tests/hashtest.c
+++ b/tests/hashtest.c
@@ -102,6 +102,17 @@ static struct {
     "0c91b91665ceaf7af5102e0ed31aa4f050668ab3c57b1f4763946d567efe66b3"
     "ab9a2016cf238dee5b44eae9f0cdfbf7b7a6eb1e759986273243dc35894706b6" },
 
+  { GCRY_MD_SM3, 256, -64,
+    "4ceb893abeb43965d4cac7626da9a4be895585b5b2f16f302626801308b1c02a" },
+  { GCRY_MD_SM3, 256, -1,
+    "825f01e4f2b6084136abc356fa1b343a9411d844a4dc1474293aad817cd2a48f" },
+  { GCRY_MD_SM3, 256, +0,
+    "d948a4025ac3ea0aa8989f43203411bd22ad17eaa5fd92ebdf9cabf869f1ba1b" },
+  { GCRY_MD_SM3, 256, +1,
+    "4f6d0e260299c1f286ef1dbb4638a0770979f266b6c007c55410ee6849cba2a8" },
+  { GCRY_MD_SM3, 256, +64,
+    "ed34869dbadd62e3bec1f511004d7bbfc9cafa965477cc48843b248293bbe867" },
+
   { 0 }
 };
 
-- 
2.19.1