diff --git a/zerotrust/sm3/SM3.cpp b/zerotrust/sm3/SM3.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..c7d7e79f15a4bb875deff35fa4943e577ffdd4e8
--- /dev/null
+++ b/zerotrust/sm3/SM3.cpp
@@ -0,0 +1,142 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "SM3.h"
+
+unsigned int SM3::T(int j)
+{
+    if (j < 16)
+        return 0x79cc4519;
+    return 0x7a879d8a;
+}
+
+unsigned int SM3::FF(unsigned int x, unsigned int y, unsigned int z, int j)
+{
+    if (j < 16)
+        return x ^ y ^ z;
+    return (x & y) | (x & z) | (y & z);
+}
+
+unsigned int SM3::GG(unsigned int x, unsigned int y, unsigned int z, int j)
+{
+    if (j < 16)
+        return x ^ y ^ z;
+    return (x & y) | (~x & z);
+}
+
+unsigned int SM3::P0(unsigned int X)
+{
+    return X ^ ROTL(X, 9) ^ ROTL(X, 17);
+}
+
+unsigned int SM3::P1(unsigned int X)
+{
+    return X ^ ROTL(X, 15) ^ ROTL(X, 23);
+}
+
+unsigned int SM3::ROTL(unsigned int x, int n)
+{
+    return x << n | x >> (32 - n);
+}
+
+void SM3::getbytes(unsigned char *bytes, unsigned long long l)
+{
+    for (int i = 0; i < 8; i++)
+        bytes[i] = l >> (56 - i * 8);
+}
+
+unsigned char *SM3::padding(unsigned char *input, unsigned long long *len)
+{
+    int padlen, length = *len;
+    int tmp = length % 64;
+    if (tmp == 56)
+        padlen = 64;
+    else if (tmp < 56)
+        padlen = 56 - tmp;
+    else
+        padlen = 120 - tmp;
+    unsigned char *output = (unsigned char *)malloc(length + padlen + 8);
+    memcpy(output, input, length);
+    output[length] = 128;
+    for (int i = 0; i < padlen - 1; i++)
+        output[length + i + 1] = 0;
+    unsigned char bytes[8];
+    getbytes(bytes, length * 8);
+    length += padlen;
+    memcpy(output + length, bytes, 8);
+    *len = length + 8;
+    return output;
+}
+
+void SM3::expend(unsigned char *m, unsigned int *w)
+{
+    int i;
+    for (i = 0; i < 16; i++)
+        w[i] = m[i * 4] << 24 | m[i * 4 + 1] << 16 | m[i * 4 + 2] << 8 | m[i * 4 + 3];
+    for (i = 16; i < 68; i++)
+        w[i] = P1(w[i - 16] ^ w[i - 9] ^ ROTL(w[i - 3], 15)) ^ ROTL(w[i - 13], 7) ^ w[i - 6];
+}
+
+void SM3::doFinal(unsigned char *msg, unsigned char *res)
+{
+    unsigned int IV[8] = {0x7380166f, 0x4914b2b9, 0x172442d7, 0xda8a0600, 0xa96f30bc, 0x163138aa, 0xe38dee4d, 0xb0fb0e4e};
+    unsigned long long len = strlen((char *)msg);
+    unsigned char *nmsg = padding(msg, &len);
+    for (int i = 0; i < len / 64; i++)
+    {
+        unsigned char tmp[64];
+        unsigned int w[68] = {0}, nw[64] = {0};
+        memcpy(tmp, nmsg + i * 64, 64);
+        expend(tmp, w);
+        for (int j = 0; j < 64; j++)
+            nw[j] = w[j] ^ w[j + 4];
+        unsigned int A = IV[0], B = IV[1], C = IV[2], D = IV[3], E = IV[4], F = IV[5], G = IV[6], H = IV[7];
+        for (int j = 0; j < 64; j++)
+        {
+            unsigned int SS1 = ROTL(ROTL(A, 12) + E + ROTL(T(j), j), 7);
+            unsigned int SS2 = SS1 ^ ROTL(A, 12);
+            unsigned int TT1 = FF(A, B, C, j) + D + SS2 + nw[j];
+            unsigned int TT2 = GG(E, F, G, j) + H + SS1 + w[j];
+            D = C;
+            C = ROTL(B, 9);
+            B = A;
+            A = TT1;
+            H = G;
+            G = ROTL(F, 19);
+            F = E;
+            E = P0(TT2);
+        }
+        IV[0] = IV[0] ^ A;
+        IV[1] = IV[1] ^ B;
+        IV[2] = IV[2] ^ C;
+        IV[3] = IV[3] ^ D;
+        IV[4] = IV[4] ^ E;
+        IV[5] = IV[5] ^ F;
+        IV[6] = IV[6] ^ G;
+        IV[7] = IV[7] ^ H;
+    }
+    for (int i = 0; i < 8; i++)
+    {
+        res[4 * i] = (IV[i] >> 24) & 0xff;
+        res[4 * i + 1] = (IV[i] >> 16) & 0xff;
+        res[4 * i + 2] = (IV[i] >> 8) & 0xff;
+        res[4 * i + 3] = IV[i] & 0xff;
+    }
+    free(nmsg);
+}
+
+void test_func()
+{
+    char msg[100] = {"adminadmin"};
+    SM3 sm3;
+    unsigned char res[32] = {0};
+    sm3.doFinal((unsigned char *)msg, res);
+    printf("text: %s\nhash res:\n", msg);
+    for (int i = 0; i < 32; i++)
+    {
+        printf("%02x", res[i]);
+        if ((i + 1) % 4 == 0)
+            printf(" ");
+    }
+    printf("\n");
+}
diff --git a/zerotrust/sm3/SM3.h b/zerotrust/sm3/SM3.h
new file mode 100644
index 0000000000000000000000000000000000000000..eaad3cd6016cad70f0872291d8b00099fbdc5b9f
--- /dev/null
+++ b/zerotrust/sm3/SM3.h
@@ -0,0 +1,16 @@
+class SM3
+{
+private:
+    unsigned int T(int j);
+    unsigned int FF(unsigned int x, unsigned int y, unsigned int z, int j);
+    unsigned int GG(unsigned int x, unsigned int y, unsigned int z, int j);
+    unsigned int P0(unsigned int X);
+    unsigned int P1(unsigned int X);
+    unsigned int ROTL(unsigned int x, int n);
+    void getbytes(unsigned char *bytes, unsigned long long l);
+    unsigned char *padding(unsigned char *input, unsigned long long *len);
+    void expend(unsigned char *m, unsigned int *w);
+
+public:
+    void doFinal(unsigned char *msg, unsigned char *res);
+};
\ No newline at end of file