File _service:tar_scm:add-sm3-crypt-support.patch of Package libxcrypt

File _service:tar_scm:add-sm3-crypt-support.patch of Package libxcrypt (Revision 189cf0ef3b928215422677ca487c860d)

Currently displaying revision 189cf0ef3b928215422677ca487c860d , Show latest

From cd29b303d2590b8377cb2a38539efdf838e8c59c Mon Sep 17 00:00:00 2001
From: houmingyong <houmingyong@huawei.com>
Date: Mon, 20 Dec 2021 16:19:09 +0800
Subject: [PATCH] add sm3 crypt support

diff --git a/Makefile.am b/Makefile.am
index c1f91d4..571473f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -79,6 +79,7 @@ noinst_HEADERS = \
 	lib/alg-md5.h \
 	lib/alg-sha1.h \
 	lib/alg-sha256.h \
+	lib/alg-sm3.h \
 	lib/alg-sha512.h \
 	lib/alg-yescrypt.h \
 	lib/byteorder.h \
@@ -107,6 +108,7 @@ libcrypt_la_SOURCES = \
 	lib/alg-md5.c \
 	lib/alg-sha1.c \
 	lib/alg-sha256.c \
+	lib/alg-sm3.c \
 	lib/alg-sha512.c \
 	lib/alg-yescrypt-common.c \
 	lib/alg-yescrypt-opt.c \
@@ -119,6 +121,7 @@ libcrypt_la_SOURCES = \
 	lib/crypt-pbkdf1-sha1.c \
 	lib/crypt-scrypt.c \
 	lib/crypt-sha256.c \
+	lib/crypt-sm3.c \
 	lib/crypt-sha512.c \
 	lib/crypt-static.c \
 	lib/crypt-sunmd5.c \
@@ -362,6 +365,7 @@ check_PROGRAMS = \
 	test/alg-pbkdf-hmac-sha256 \
 	test/alg-sha1 \
 	test/alg-sha256 \
+	test/alg-sm3 \
 	test/alg-sha512 \
 	test/alg-yescrypt \
 	test/badsalt \
@@ -574,6 +578,9 @@ test_crypt_gost_yescrypt_LDADD = \
 	lib/libcrypt_la-util-xbzero.lo \
 	lib/libcrypt_la-util-xstrcpy.lo \
 	$(COMMON_TEST_OBJECTS)
+test_alg_sm3_LDADD = \
+	lib/libcrypt_la-alg-sm3.lo \
+	$(COMMON_TEST_OBJECTS)
 
 test_explicit_bzero_LDADD = \
 	lib/libcrypt_la-util-xbzero.lo
diff --git a/README.md b/README.md
index 45b7f02..8a9abfd 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ README for libxcrypt
 
 libxcrypt is a modern library for one-way hashing of passwords.  It
 supports a wide variety of both modern and historical hashing methods:
-yescrypt, gost-yescrypt, scrypt, bcrypt, sha512crypt, sha256crypt,
+yescrypt, gost-yescrypt, scrypt, bcrypt, sha512crypt, sha256crypt, sm3crypt
 md5crypt, SunMD5, sha1crypt, NT, bsdicrypt, bigcrypt, and descrypt.
 It provides the traditional Unix `crypt` and `crypt_r` interfaces, as
 well as a set of extended interfaces pioneered by Openwall Linux,
@@ -164,7 +164,7 @@ returns `$3$`.
 
 glibc’s libcrypt could optionally be configured to use Mozilla’s NSS
 library’s implementations of the cryptographic primitives md5crypt,
-sha256crypt, and sha512crypt.  This option is not available in
+sha256crypt, sm3crypt and sha512crypt.  This option is not available in
 libxcrypt, because we do not currently believe it is a desirable
 option.  The stated rationale for the option was to source all
 cryptographic primitives from a library that has undergone FIPS
diff --git a/doc/crypt.5 b/doc/crypt.5
index 0b81c10..326969e 100644
--- a/doc/crypt.5
+++ b/doc/crypt.5
@@ -218,6 +218,14 @@ Acceptable for new hashes.
 The default CPU time cost parameter is 5000,
 which is too low for modern hardware.
 .hash "$5$" "\e$5\e$(rounds=[1-9][0-9]+\e$)?[^$:\(rsn]{1,16}\e$[./0-9A-Za-z]{43}" unlimited 8 256 256 "6 to 96" "1000 to 999,999,999"
+.Ss sm3crypt
+A hash based on SM3 with 256-bit output,
+originally developed by Ribose for OpenSSL.
+Supported on Linux but not common elsewhere.
+Acceptable for new hashes.
+The default CPU time cost parameter is 5000,
+which is too low for modern hardware.
+.hash "$sm3$" "\e$sm3\e$(rounds=[1-9][0-9]+\e$)?[./0-9A-Za-z]{1,16}\e$[./0-9A-Za-z]{43}" unlimited 8 256 256 "6 to 96" "1000 to 999,999,999"
 .Ss sha1crypt
 A hash based on HMAC-SHA1.
 Originally developed by Simon Gerraty for NetBSD.
diff --git a/lib/alg-sm3.c b/lib/alg-sm3.c
new file mode 100644
index 0000000..5347e11
--- /dev/null
+++ b/lib/alg-sm3.c
@@ -0,0 +1,419 @@
+/*-
+ * Copyright(C) 2017-2021. Huawei Technologies Co.,Ltd. All Rights Reserved.
+ * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2017 Ribose Inc. All Rights Reserved.
+ * Ported from Ribose contributions from Botan.
+ *
+ * Licensed under the Apache License 2.0 (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 "crypt-port.h"
+
+#if INCLUDE_sm3crypt
+
+#define insecure_memzero explicit_bzero
+
+#include "alg-sm3.h"
+#include "byteorder.h"
+
+#define ROTATE(a,n)     (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
+
+#define P0(X) (X ^ ROTATE(X, 9) ^ ROTATE(X, 17))
+#define P1(X) (X ^ ROTATE(X, 15) ^ ROTATE(X, 23))
+
+#define FF0(X,Y,Z) (X ^ Y ^ Z)
+#define GG0(X,Y,Z) (X ^ Y ^ Z)
+
+#define FF1(X,Y,Z) ((X & Y) | ((X | Y) & Z))
+#define GG1(X,Y,Z) ((Z ^ (X & (Y ^ Z))))
+
+#define EXPAND(W0,W7,W13,W3,W10) \
+   (P1(W0 ^ W7 ^ ROTATE(W13, 15)) ^ ROTATE(W3, 7) ^ W10)
+
+#define RND(A, B, C, D, E, F, G, H, TJ, Wi, Wj, FF, GG)           \
+     do {                                                         \
+       const uint32_t A12 = ROTATE(A, 12);                        \
+       const uint32_t A12_SM = A12 + E + TJ;                      \
+       const uint32_t SS1 = ROTATE(A12_SM, 7);                    \
+       const uint32_t TT1 = FF(A, B, C) + D + (SS1 ^ A12) + (Wj); \
+       const uint32_t TT2 = GG(E, F, G) + H + SS1 + Wi;           \
+       B = ROTATE(B, 9);                                          \
+       D = TT1;                                                   \
+       F = ROTATE(F, 19);                                         \
+       H = P0(TT2);                                               \
+     } while(0)
+
+#define R1(A,B,C,D,E,F,G,H,TJ,Wi,Wj) \
+   RND(A,B,C,D,E,F,G,H,TJ,Wi,Wj,FF0,GG0)
+
+#define R2(A,B,C,D,E,F,G,H,TJ,Wi,Wj) \
+   RND(A,B,C,D,E,F,G,H,TJ,Wi,Wj,FF1,GG1)
+
+/*
+ * Encode a length len*2 vector of (uint32_t) into a length len*8 vector of
+ * (uint8_t) in big-endian form.
+ */
+static void
+sm3_be32enc_vect(uint8_t * dst, const uint32_t * src, size_t len)
+{
+
+	/* Encode vector, two words at a time. */
+	do {
+		be32enc(&dst[0], src[0]);
+		be32enc(&dst[4], src[1]);
+		src += 2;
+		dst += 8;
+	} while (--len);
+}
+
+/*
+ * Decode a big-endian length len*8 vector of (uint8_t) into a length
+ * len*2 vector of (uint32_t).
+ */
+static void
+sm3_be32dec_vect(uint32_t * dst, const uint8_t * src, size_t len)
+{
+
+	/* Decode vector, two words at a time. */
+	do {
+		dst[0] = be32dec(&src[0]);
+		dst[1] = be32dec(&src[4]);
+		src += 8;
+		dst += 2;
+	} while (--len);
+}
+
+static void
+SM3_Transform(uint32_t state[static restrict 8],
+    const uint8_t block[static restrict 64],
+    uint32_t W[static restrict 64])
+{
+	register uint32_t A, B, C, D, E, F, G, H;
+	uint32_t W00, W01, W02, W03, W04, W05, W06, W07,
+		 W08, W09, W10, W11, W12, W13, W14, W15;
+
+	/* 1. Prepare the first part of the message schedule W. */
+	sm3_be32dec_vect(W, block, 8);
+	
+	A = state[0];
+	B = state[1];
+	C = state[2];
+	D = state[3];
+	E = state[4];
+	F = state[5];
+	G = state[6];
+	H = state[7];
+
+	W00 = W[0];	
+	W01 = W[1];	
+	W02 = W[2];	
+	W03 = W[3];	
+	W04 = W[4];	
+	W05 = W[5];	
+	W06 = W[6];	
+	W07 = W[7];	
+	W08 = W[8];	
+	W09 = W[9];	
+	W10 = W[10];	
+	W11 = W[11];	
+	W12 = W[12];	
+	W13 = W[13];	
+	W14 = W[14];	
+	W15 = W[15];	
+
+        R1(A, B, C, D, E, F, G, H, 0x79CC4519, W00, W00 ^ W04);
+        W00 = EXPAND(W00, W07, W13, W03, W10);
+        R1(D, A, B, C, H, E, F, G, 0xF3988A32, W01, W01 ^ W05);
+        W01 = EXPAND(W01, W08, W14, W04, W11);
+        R1(C, D, A, B, G, H, E, F, 0xE7311465, W02, W02 ^ W06);
+        W02 = EXPAND(W02, W09, W15, W05, W12);
+        R1(B, C, D, A, F, G, H, E, 0xCE6228CB, W03, W03 ^ W07);
+        W03 = EXPAND(W03, W10, W00, W06, W13);
+        R1(A, B, C, D, E, F, G, H, 0x9CC45197, W04, W04 ^ W08);
+        W04 = EXPAND(W04, W11, W01, W07, W14);
+        R1(D, A, B, C, H, E, F, G, 0x3988A32F, W05, W05 ^ W09);
+        W05 = EXPAND(W05, W12, W02, W08, W15);
+        R1(C, D, A, B, G, H, E, F, 0x7311465E, W06, W06 ^ W10);
+        W06 = EXPAND(W06, W13, W03, W09, W00);
+        R1(B, C, D, A, F, G, H, E, 0xE6228CBC, W07, W07 ^ W11);
+        W07 = EXPAND(W07, W14, W04, W10, W01);
+        R1(A, B, C, D, E, F, G, H, 0xCC451979, W08, W08 ^ W12);
+        W08 = EXPAND(W08, W15, W05, W11, W02);
+        R1(D, A, B, C, H, E, F, G, 0x988A32F3, W09, W09 ^ W13);
+        W09 = EXPAND(W09, W00, W06, W12, W03);
+        R1(C, D, A, B, G, H, E, F, 0x311465E7, W10, W10 ^ W14);
+        W10 = EXPAND(W10, W01, W07, W13, W04);
+        R1(B, C, D, A, F, G, H, E, 0x6228CBCE, W11, W11 ^ W15);
+        W11 = EXPAND(W11, W02, W08, W14, W05);
+        R1(A, B, C, D, E, F, G, H, 0xC451979C, W12, W12 ^ W00);
+        W12 = EXPAND(W12, W03, W09, W15, W06);
+        R1(D, A, B, C, H, E, F, G, 0x88A32F39, W13, W13 ^ W01);
+        W13 = EXPAND(W13, W04, W10, W00, W07);
+        R1(C, D, A, B, G, H, E, F, 0x11465E73, W14, W14 ^ W02);
+        W14 = EXPAND(W14, W05, W11, W01, W08);
+        R1(B, C, D, A, F, G, H, E, 0x228CBCE6, W15, W15 ^ W03);
+        W15 = EXPAND(W15, W06, W12, W02, W09);
+        R2(A, B, C, D, E, F, G, H, 0x9D8A7A87, W00, W00 ^ W04);
+        W00 = EXPAND(W00, W07, W13, W03, W10);
+        R2(D, A, B, C, H, E, F, G, 0x3B14F50F, W01, W01 ^ W05);
+        W01 = EXPAND(W01, W08, W14, W04, W11);
+        R2(C, D, A, B, G, H, E, F, 0x7629EA1E, W02, W02 ^ W06);
+        W02 = EXPAND(W02, W09, W15, W05, W12);
+        R2(B, C, D, A, F, G, H, E, 0xEC53D43C, W03, W03 ^ W07);
+        W03 = EXPAND(W03, W10, W00, W06, W13);
+        R2(A, B, C, D, E, F, G, H, 0xD8A7A879, W04, W04 ^ W08);
+        W04 = EXPAND(W04, W11, W01, W07, W14);
+        R2(D, A, B, C, H, E, F, G, 0xB14F50F3, W05, W05 ^ W09);
+        W05 = EXPAND(W05, W12, W02, W08, W15);
+        R2(C, D, A, B, G, H, E, F, 0x629EA1E7, W06, W06 ^ W10);
+        W06 = EXPAND(W06, W13, W03, W09, W00);
+        R2(B, C, D, A, F, G, H, E, 0xC53D43CE, W07, W07 ^ W11);
+        W07 = EXPAND(W07, W14, W04, W10, W01);
+        R2(A, B, C, D, E, F, G, H, 0x8A7A879D, W08, W08 ^ W12);
+        W08 = EXPAND(W08, W15, W05, W11, W02);
+        R2(D, A, B, C, H, E, F, G, 0x14F50F3B, W09, W09 ^ W13);
+        W09 = EXPAND(W09, W00, W06, W12, W03);
+        R2(C, D, A, B, G, H, E, F, 0x29EA1E76, W10, W10 ^ W14);
+        W10 = EXPAND(W10, W01, W07, W13, W04);
+        R2(B, C, D, A, F, G, H, E, 0x53D43CEC, W11, W11 ^ W15);
+        W11 = EXPAND(W11, W02, W08, W14, W05);
+        R2(A, B, C, D, E, F, G, H, 0xA7A879D8, W12, W12 ^ W00);
+        W12 = EXPAND(W12, W03, W09, W15, W06);
+        R2(D, A, B, C, H, E, F, G, 0x4F50F3B1, W13, W13 ^ W01);
+        W13 = EXPAND(W13, W04, W10, W00, W07);
+        R2(C, D, A, B, G, H, E, F, 0x9EA1E762, W14, W14 ^ W02);
+        W14 = EXPAND(W14, W05, W11, W01, W08);
+        R2(B, C, D, A, F, G, H, E, 0x3D43CEC5, W15, W15 ^ W03);
+        W15 = EXPAND(W15, W06, W12, W02, W09);
+        R2(A, B, C, D, E, F, G, H, 0x7A879D8A, W00, W00 ^ W04);
+        W00 = EXPAND(W00, W07, W13, W03, W10);
+        R2(D, A, B, C, H, E, F, G, 0xF50F3B14, W01, W01 ^ W05);
+        W01 = EXPAND(W01, W08, W14, W04, W11);
+        R2(C, D, A, B, G, H, E, F, 0xEA1E7629, W02, W02 ^ W06);
+        W02 = EXPAND(W02, W09, W15, W05, W12);
+        R2(B, C, D, A, F, G, H, E, 0xD43CEC53, W03, W03 ^ W07);
+        W03 = EXPAND(W03, W10, W00, W06, W13);
+        R2(A, B, C, D, E, F, G, H, 0xA879D8A7, W04, W04 ^ W08);
+        W04 = EXPAND(W04, W11, W01, W07, W14);
+        R2(D, A, B, C, H, E, F, G, 0x50F3B14F, W05, W05 ^ W09);
+        W05 = EXPAND(W05, W12, W02, W08, W15);
+        R2(C, D, A, B, G, H, E, F, 0xA1E7629E, W06, W06 ^ W10);
+        W06 = EXPAND(W06, W13, W03, W09, W00);
+        R2(B, C, D, A, F, G, H, E, 0x43CEC53D, W07, W07 ^ W11);
+        W07 = EXPAND(W07, W14, W04, W10, W01);
+        R2(A, B, C, D, E, F, G, H, 0x879D8A7A, W08, W08 ^ W12);
+        W08 = EXPAND(W08, W15, W05, W11, W02);
+        R2(D, A, B, C, H, E, F, G, 0x0F3B14F5, W09, W09 ^ W13);
+        W09 = EXPAND(W09, W00, W06, W12, W03);
+        R2(C, D, A, B, G, H, E, F, 0x1E7629EA, W10, W10 ^ W14);
+        W10 = EXPAND(W10, W01, W07, W13, W04);
+        R2(B, C, D, A, F, G, H, E, 0x3CEC53D4, W11, W11 ^ W15);
+        W11 = EXPAND(W11, W02, W08, W14, W05);
+        R2(A, B, C, D, E, F, G, H, 0x79D8A7A8, W12, W12 ^ W00);
+        W12 = EXPAND(W12, W03, W09, W15, W06);
+        R2(D, A, B, C, H, E, F, G, 0xF3B14F50, W13, W13 ^ W01);
+        W13 = EXPAND(W13, W04, W10, W00, W07);
+        R2(C, D, A, B, G, H, E, F, 0xE7629EA1, W14, W14 ^ W02);
+        W14 = EXPAND(W14, W05, W11, W01, W08);
+        R2(B, C, D, A, F, G, H, E, 0xCEC53D43, W15, W15 ^ W03);
+        W15 = EXPAND(W15, W06, W12, W02, W09);
+        R2(A, B, C, D, E, F, G, H, 0x9D8A7A87, W00, W00 ^ W04);
+        W00 = EXPAND(W00, W07, W13, W03, W10);
+        R2(D, A, B, C, H, E, F, G, 0x3B14F50F, W01, W01 ^ W05);
+        W01 = EXPAND(W01, W08, W14, W04, W11);
+        R2(C, D, A, B, G, H, E, F, 0x7629EA1E, W02, W02 ^ W06);
+        W02 = EXPAND(W02, W09, W15, W05, W12);
+        R2(B, C, D, A, F, G, H, E, 0xEC53D43C, W03, W03 ^ W07);
+        W03 = EXPAND(W03, W10, W00, W06, W13);
+        R2(A, B, C, D, E, F, G, H, 0xD8A7A879, W04, W04 ^ W08);
+        R2(D, A, B, C, H, E, F, G, 0xB14F50F3, W05, W05 ^ W09);
+        R2(C, D, A, B, G, H, E, F, 0x629EA1E7, W06, W06 ^ W10);
+        R2(B, C, D, A, F, G, H, E, 0xC53D43CE, W07, W07 ^ W11);
+        R2(A, B, C, D, E, F, G, H, 0x8A7A879D, W08, W08 ^ W12);
+        R2(D, A, B, C, H, E, F, G, 0x14F50F3B, W09, W09 ^ W13);
+        R2(C, D, A, B, G, H, E, F, 0x29EA1E76, W10, W10 ^ W14);
+        R2(B, C, D, A, F, G, H, E, 0x53D43CEC, W11, W11 ^ W15);
+        R2(A, B, C, D, E, F, G, H, 0xA7A879D8, W12, W12 ^ W00);
+        R2(D, A, B, C, H, E, F, G, 0x4F50F3B1, W13, W13 ^ W01);
+        R2(C, D, A, B, G, H, E, F, 0x9EA1E762, W14, W14 ^ W02);
+        R2(B, C, D, A, F, G, H, E, 0x3D43CEC5, W15, W15 ^ W03);
+
+	state[0] ^= A;
+	state[1] ^= B;
+	state[2] ^= C;
+	state[3] ^= D;
+	state[4] ^= E;
+	state[5] ^= F;
+	state[6] ^= G;
+	state[7] ^= H;
+}
+
+/* Magic initialization constants. */
+static const uint32_t initial_state[8] = {
+	0x7380166f, 0x4914b2b9, 0x172442d7, 0xda8a0600,
+	0xa96f30bc, 0x163138aa, 0xe38dee4d, 0xb0fb0e4e
+};
+
+/**
+ * SM3_Init(ctx):
+ * Initialize the SM3 context ${ctx}.
+ */
+void
+SM3_Init(SM3_CTX * ctx)
+{
+
+	/* Zero bits processed so far. */
+	ctx->count = 0;
+
+	/* Initialize state. */
+	memcpy(ctx->state, initial_state, sizeof(initial_state));
+}
+
+
+/**
+ * SM3_Update(ctx, in, len):
+ * Input ${len} bytes from ${in} into the SM3 context ${ctx}.
+ */
+static void
+_SM3_Update(SM3_CTX * ctx, const void * in, size_t len,
+    uint32_t tmp32[static restrict 72])
+{
+	uint32_t r;
+	const uint8_t * src = in;
+
+	/* Return immediately if we have nothing to do. */
+	if (len == 0)
+		return;
+
+	/* Number of bytes left in the buffer from previous updates. */
+	r = (ctx->count >> 3) & 0x3f;
+
+	/* Update number of bits. */
+	ctx->count += (uint64_t)(len) << 3;
+
+	/* Handle the case where we don't need to perform any transforms. */
+	if (len < 64 - r) {
+		memcpy(&ctx->buf[r], src, len);
+		return;
+	}
+
+	/* Finish the current block. */
+	memcpy(&ctx->buf[r], src, 64 - r);
+	SM3_Transform(ctx->state, ctx->buf, &tmp32[0]);
+	src += 64 - r;
+	len -= 64 - r;
+
+	/* Perform complete blocks. */
+	while (len >= 64) {
+		SM3_Transform(ctx->state, src, &tmp32[0]);
+		src += 64;
+		len -= 64;
+	}
+
+	/* Copy left over data into buffer. */
+	memcpy(ctx->buf, src, len);
+}
+
+/* Wrapper function for intermediate-values sanitization. */
+void
+SM3_Update(SM3_CTX * ctx, const void * in, size_t len)
+{
+	uint32_t tmp32[72];
+
+	/* Call the real function. */
+	_SM3_Update(ctx, in, len, tmp32);
+
+	/* Clean the stack. */
+	insecure_memzero(tmp32, 288);
+}
+
+static const uint8_t PAD[64] = {
+	0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/* Add padding and terminating bit-count. */
+static void
+SM3_Pad(SM3_CTX * ctx, uint32_t tmp32[static restrict 72])
+{
+	size_t r;
+
+	/* Figure out how many bytes we have buffered. */
+	r = (ctx->count >> 3) & 0x3f;
+
+	/* Pad to 56 mod 64, transforming if we finish a block en route. */
+	if (r < 56) {
+		/* Pad to 56 mod 64. */
+		memcpy(&ctx->buf[r], PAD, 56 - r);
+	} else {
+		/* Finish the current block and mix. */
+		memcpy(&ctx->buf[r], PAD, 64 - r);
+		SM3_Transform(ctx->state, ctx->buf, &tmp32[0]);
+
+		/* The start of the final block is all zeroes. */
+		memset(&ctx->buf[0], 0, 56);
+	}
+
+	/* Add the terminating bit-count. */
+	be64enc(&ctx->buf[56], ctx->count);
+
+	/* Mix in the final block. */
+	SM3_Transform(ctx->state, ctx->buf, &tmp32[0]);
+}
+/**
+ * SM3_Final(digest, ctx):
+ * Output the SM3 hash of the data input to the context ${ctx} into the
+ * buffer ${digest}.
+ */
+static void
+_SM3_Final(uint8_t digest[32], SM3_CTX * ctx,
+    uint32_t tmp32[static restrict 72])
+{
+
+	/* Add padding. */
+	SM3_Pad(ctx, tmp32);
+
+	/* Write the hash. */
+	sm3_be32enc_vect(digest, ctx->state, 4);
+}
+
+/* Wrapper function for intermediate-values sanitization. */
+void
+SM3_Final(uint8_t digest[32], SM3_CTX * ctx)
+{
+	uint32_t tmp32[72];
+
+	/* Call the real function. */
+	_SM3_Final(digest, ctx, tmp32);
+
+	/* Clear the context state. */
+	insecure_memzero(ctx, sizeof(SM3_CTX));
+
+	/* Clean the stack. */
+	insecure_memzero(tmp32, 288);
+}
+
+/**
+ * SM3_Buf(in, len, digest):
+ * Compute the SM3 hash of ${len} bytes from ${in} and write it to ${digest}.
+ */
+void
+SM3_Buf(const void * in, size_t len, uint8_t digest[32])
+{
+	SM3_CTX ctx;
+	uint32_t tmp32[72];
+
+	SM3_Init(&ctx);
+	_SM3_Update(&ctx, in, len, tmp32);
+	_SM3_Final(digest, &ctx, tmp32);
+
+	/* Clean the stack. */
+	insecure_memzero(&ctx, sizeof(SM3_CTX));
+	insecure_memzero(tmp32, 288);
+}
+#endif /* INCLUDE_sm3crypt */
diff --git a/lib/alg-sm3.h b/lib/alg-sm3.h
new file mode 100644
index 0000000..5c76e6b
--- /dev/null
+++ b/lib/alg-sm3.h
@@ -0,0 +1,62 @@
+/*-
+ * Copyright(C) 2017-2021. Huawei Technologies Co.,Ltd. All Rights Reserved.
+ * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2017 Ribose Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (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 _SM3_H_
+#define _SM3_H_
+
+#include "crypt-port.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+/*
+ * Use #defines in order to avoid namespace collisions with anyone else's
+ * SM3 code (e.g., the code in OpenSSL).
+ */
+#define SM3_Init libcperciva_SM3_Init
+#define SM3_Update libcperciva_SM3_Update
+#define SM3_Final libcperciva_SM3_Final
+#define SM3_Buf libcperciva_SM3_Buf
+#define SM3_CTX libcperciva_SM3_CTX
+
+/* Context structure for SM3 operations. */
+typedef struct {
+	uint32_t state[8];
+	uint64_t count;
+	uint8_t buf[64];
+} SM3_CTX;
+
+/**
+ * SM3_Init(ctx):
+ * Initialize the SM3 context ${ctx}.
+ */
+void SM3_Init(SM3_CTX *);
+
+/**
+ * SM3_Update(ctx, in, len):
+ * Input ${len} bytes from ${in} into the SM3 context ${ctx}.
+ */
+void SM3_Update(SM3_CTX *, const void *, size_t);
+
+/**
+ * SM3_Final(digest, ctx):
+ * Output the SM3 hash of the data input to the context ${ctx} into the
+ * buffer ${digest}.
+ */
+void SM3_Final(uint8_t[32], SM3_CTX *);
+
+/**
+ * SM3_Buf(in, len, digest):
+ * Compute the SM3 hash of ${len} bytes from ${in} and write it to ${digest}.
+ */
+void SM3_Buf(const void *, size_t, uint8_t[32]);
+
+#endif /* !_SM3_H_ */
diff --git a/lib/crypt-port.h b/lib/crypt-port.h
index 307b526..7ad44b0 100644
--- a/lib/crypt-port.h
+++ b/lib/crypt-port.h
@@ -357,7 +357,7 @@ extern size_t strcpy_or_abort (void *dst, size_t d_size, const void *src);
 #define libcperciva_SHA512_Buf    _crypt_SHA512_Buf
 #endif
 
-#if INCLUDE_md5crypt || INCLUDE_sha256crypt || INCLUDE_sha512crypt
+#if INCLUDE_md5crypt || INCLUDE_sha256crypt || INCLUDE_sha512crypt || INCLUDE_sm3crypt
 #define gensalt_sha_rn           _crypt_gensalt_sha_rn
 #endif
 
@@ -392,6 +392,13 @@ extern size_t strcpy_or_abort (void *dst, size_t d_size, const void *src);
 #define libcperciva_SHA256_Buf   _crypt_SHA256_Buf
 #endif
 
+#if INCLUDE_sm3crypt
+#define libcperciva_SM3_Init  _crypt_SM3_Init
+#define libcperciva_SM3_Update _crypt_SM3_Update
+#define libcperciva_SM3_Final _crypt_SM3_Final
+#define libcperciva_SM3_Buf   _crypt_SM3_Buf
+#endif
+
 #if INCLUDE_gost_yescrypt
 #define GOST34112012Init       _crypt_GOST34112012_Init
 #define GOST34112012Update     _crypt_GOST34112012_Update
diff --git a/lib/crypt-sm3.c b/lib/crypt-sm3.c
new file mode 100644
index 0000000..1a817cd
--- /dev/null
+++ b/lib/crypt-sm3.c
@@ -0,0 +1,358 @@
+/* One way encryption based on the SM3-based Unix crypt implementation.
+ *
+ * Written by Ulrich Drepper <drepper at redhat.com> in 2007 [1].
+ * Modified by Zack Weinberg <zackw at panix.com> in 2017, 2018.
+ * Composed by Björn Esser <besser82 at fedoraproject.org> in 2018.
+ * To the extent possible under law, the named authors have waived all
+ * copyright and related or neighboring rights to this work.
+ *
+ * See https://creativecommons.org/publicdomain/zero/1.0/ for further
+ * details.
+ *
+ * This file is a modified except from [2], lines 648 up to 909.
+ *
+ * [1]  https://www.akkadia.org/drepper/sha-crypt.html
+ * [2]  https://www.akkadia.org/drepper/SHA-crypt.txt
+ */
+
+#include "crypt-port.h"
+#include "alg-sm3.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#if INCLUDE_sm3crypt
+
+/* Define our magic string to mark salt for SM3 "encryption"
+   replacement.  */
+static const char sm3_salt_prefix[] = "$sm3$";
+
+/* Prefix for optional rounds specification.  */
+static const char sm3_rounds_prefix[] = "rounds=";
+
+/* Maximum salt string length.  */
+#define SALT_LEN_MAX 16
+/* Default number of rounds if not explicitly specified.  */
+#define ROUNDS_DEFAULT 5000
+/* Minimum number of rounds.  */
+#define ROUNDS_MIN 1000
+/* Maximum number of rounds.  */
+#define ROUNDS_MAX 999999999
+
+/* The maximum possible length of a SM3-hashed password string,
+   including the terminating NUL character.  Prefix (including its NUL)
+   + rounds tag ("rounds=$" = "rounds=\0") + strlen(ROUNDS_MAX)
+   + salt (up to SALT_LEN_MAX chars) + '$' + hash (43 chars).  */
+
+#define LENGTH_OF_NUMBER(n) (sizeof #n - 1)
+
+#define SM3_HASH_LENGTH \
+  (sizeof (sm3_salt_prefix) + sizeof (sm3_rounds_prefix) + \
+   LENGTH_OF_NUMBER (ROUNDS_MAX) + SALT_LEN_MAX + 1 + 43)
+
+static_assert (SM3_HASH_LENGTH <= CRYPT_OUTPUT_SIZE,
+               "CRYPT_OUTPUT_SIZE is too small for SM3");
+
+/* A SM3_buffer holds all of the sensitive intermediate data.  */
+struct SM3_buffer
+{
+  SM3_CTX ctx;
+  uint8_t result[32];
+  uint8_t p_bytes[32];
+  uint8_t s_bytes[32];
+};
+
+static_assert (sizeof (struct SM3_buffer) <= ALG_SPECIFIC_SIZE,
+               "ALG_SPECIFIC_SIZE is too small for SM3");
+
+
+/* Feed CTX with LEN bytes of a virtual byte sequence consisting of
+   BLOCK repeated over and over indefinitely.  */
+static void
+SM3_Update_recycled (SM3_CTX *ctx,
+                        unsigned char block[32], size_t len)
+{
+  size_t cnt;
+  for (cnt = len; cnt >= 32; cnt -= 32)
+    SM3_Update (ctx, block, 32);
+  SM3_Update (ctx, block, cnt);
+}
+
+void
+crypt_sm3crypt_rn (const char *phrase, size_t phr_size,
+                      const char *setting, size_t ARG_UNUSED (set_size),
+                      uint8_t *output, size_t out_size,
+                      void *scratch, size_t scr_size)
+{
+  /* This shouldn't ever happen, but...  */
+  if (out_size < SM3_HASH_LENGTH
+      || scr_size < sizeof (struct SM3_buffer))
+    {
+      errno = ERANGE;
+      return;
+    }
+
+  struct SM3_buffer *buf = scratch;
+  SM3_CTX *ctx = &buf->ctx;
+  uint8_t *result = buf->result;
+  uint8_t *p_bytes = buf->p_bytes;
+  uint8_t *s_bytes = buf->s_bytes;
+  char *cp = (char *)output;
+  const char *salt = setting;
+
+  size_t salt_size;
+  size_t cnt;
+  /* Default number of rounds.  */
+  size_t rounds = ROUNDS_DEFAULT;
+  bool rounds_custom = false;
+
+  /* Find beginning of salt string.  The prefix should normally always
+     be present.  Just in case it is not.  */
+  if (strncmp (sm3_salt_prefix, salt, sizeof (sm3_salt_prefix) - 1) == 0)
+    /* Skip salt prefix.  */
+    salt += sizeof (sm3_salt_prefix) - 1;
+
+  if (strncmp (salt, sm3_rounds_prefix, sizeof (sm3_rounds_prefix) - 1)
+      == 0)
+    {
+      const char *num = salt + sizeof (sm3_rounds_prefix) - 1;
+      /* Do not allow an explicit setting of zero rounds, nor of the
+         default number of rounds, nor leading zeroes on the rounds.  */
+      if (!(*num >= '1' && *num <= '9'))
+        {
+          errno = EINVAL;
+          return;
+        }
+
+      errno = 0;
+      char *endp;
+      rounds = strtoul (num, &endp, 10);
+      if (endp == num || *endp != '$'
+          || rounds < ROUNDS_MIN
+          || rounds > ROUNDS_MAX
+          || errno)
+        {
+          errno = EINVAL;
+          return;
+        }
+      salt = endp + 1;
+      rounds_custom = true;
+    }
+
+  salt_size = strspn (salt, b64t);
+  if (salt[salt_size] && salt[salt_size] != '$')
+    {
+      errno = EINVAL;
+      return;
+    }
+  if (salt_size > SALT_LEN_MAX)
+    salt_size = SALT_LEN_MAX;
+
+  /* Compute alternate SM3 sum with input PHRASE, SALT, and PHRASE.  The
+     final result will be added to the first context.  */
+  SM3_Init (ctx);
+
+  /* Add phrase.  */
+  SM3_Update (ctx, phrase, phr_size);
+
+  /* Add salt.  */
+  SM3_Update (ctx, salt, salt_size);
+
+  /* Add phrase again.  */
+  SM3_Update (ctx, phrase, phr_size);
+
+  /* Now get result of this (32 bytes).  */
+  SM3_Final (result, ctx);
+
+  /* Prepare for the real work.  */
+  SM3_Init (ctx);
+
+  /* Add the phrase string.  */
+  SM3_Update (ctx, phrase, phr_size);
+
+  /* The last part is the salt string.  This must be at most 8
+     characters and it ends at the first `$' character (for
+     compatibility with existing implementations).  */
+  SM3_Update (ctx, salt, salt_size);
+
+  /* Add for any character in the phrase one byte of the alternate sum.  */
+  for (cnt = phr_size; cnt > 32; cnt -= 32)
+    SM3_Update (ctx, result, 32);
+  SM3_Update (ctx, result, cnt);
+
+  /* Take the binary representation of the length of the phrase and for every
+     1 add the alternate sum, for every 0 the phrase.  */
+  for (cnt = phr_size; cnt > 0; cnt >>= 1)
+    if ((cnt & 1) != 0)
+      SM3_Update (ctx, result, 32);
+    else
+      SM3_Update (ctx, phrase, phr_size);
+
+  /* Create intermediate result.  */
+  SM3_Final (result, ctx);
+
+  /* Start computation of P byte sequence.  */
+  SM3_Init (ctx);
+
+  /* For every character in the password add the entire password.  */
+  for (cnt = 0; cnt < phr_size; ++cnt)
+    SM3_Update (ctx, phrase, phr_size);
+
+  /* Finish the digest.  */
+  SM3_Final (p_bytes, ctx);
+
+  /* Start computation of S byte sequence.  */
+  SM3_Init (ctx);
+
+  /* For every character in the password add the entire password.  */
+  for (cnt = 0; cnt < (size_t) 16 + (size_t) result[0]; ++cnt)
+    SM3_Update (ctx, salt, salt_size);
+
+  /* Finish the digest.  */
+  SM3_Final (s_bytes, ctx);
+
+  /* Repeatedly run the collected hash value through SM3 to burn
+     CPU cycles.  */
+  for (cnt = 0; cnt < rounds; ++cnt)
+    {
+      /* New context.  */
+      SM3_Init (ctx);
+
+      /* Add phrase or last result.  */
+      if ((cnt & 1) != 0)
+        SM3_Update_recycled (ctx, p_bytes, phr_size);
+      else
+        SM3_Update (ctx, result, 32);
+
+      /* Add salt for numbers not divisible by 3.  */
+      if (cnt % 3 != 0)
+        SM3_Update_recycled (ctx, s_bytes, salt_size);
+
+      /* Add phrase for numbers not divisible by 7.  */
+      if (cnt % 7 != 0)
+        SM3_Update_recycled (ctx, p_bytes, phr_size);
+
+      /* Add phrase or last result.  */
+      if ((cnt & 1) != 0)
+        SM3_Update (ctx, result, 32);
+      else
+        SM3_Update_recycled (ctx, p_bytes, phr_size);
+
+      /* Create intermediate result.  */
+      SM3_Final (result, ctx);
+    }
+
+  /* Now we can construct the result string.  It consists of four
+     parts, one of which is optional.  We already know that there
+     is sufficient space at CP for the longest possible result string.  */
+  memcpy (cp, sm3_salt_prefix, sizeof (sm3_salt_prefix) - 1);
+  cp += sizeof (sm3_salt_prefix) - 1;
+
+  if (rounds_custom)
+    {
+      int n = snprintf (cp,
+                        SM3_HASH_LENGTH - (sizeof (sm3_salt_prefix) - 1),
+                        "%s%zu$", sm3_rounds_prefix, rounds);
+      cp += n;
+    }
+
+  memcpy (cp, salt, salt_size);
+  cp += salt_size;
+  *cp++ = '$';
+
+#define b64_from_24bit(B2, B1, B0, N)                   \
+  do {                                                  \
+    unsigned int w = ((((unsigned int)(B2)) << 16) |    \
+                      (((unsigned int)(B1)) << 8) |     \
+                      ((unsigned int)(B0)));            \
+    int n = (N);                                        \
+    while (n-- > 0)                                     \
+      {                                                 \
+        *cp++ = b64t[w & 0x3f];                         \
+        w >>= 6;                                        \
+      }                                                 \
+  } while (0)
+
+  b64_from_24bit (result[0], result[10], result[20], 4);
+  b64_from_24bit (result[21], result[1], result[11], 4);
+  b64_from_24bit (result[12], result[22], result[2], 4);
+  b64_from_24bit (result[3], result[13], result[23], 4);
+  b64_from_24bit (result[24], result[4], result[14], 4);
+  b64_from_24bit (result[15], result[25], result[5], 4);
+  b64_from_24bit (result[6], result[16], result[26], 4);
+  b64_from_24bit (result[27], result[7], result[17], 4);
+  b64_from_24bit (result[18], result[28], result[8], 4);
+  b64_from_24bit (result[9], result[19], result[29], 4);
+  b64_from_24bit (0, result[31], result[30], 3);
+
+  *cp = '\0';
+}
+
+void
+gensalt_sm3crypt_rn (unsigned long count,
+                        const uint8_t *rbytes, size_t nrbytes,
+                        uint8_t *output, size_t output_size)
+{
+  /* We will use more rbytes if available, but at least this much is
+     required.  */
+  if (nrbytes < 5)
+    {
+      errno = EINVAL;
+      return;
+    }
+
+  if (count == 0)
+    count = ROUNDS_DEFAULT;
+  if (count < ROUNDS_MIN)
+    count = ROUNDS_MIN;
+  if (count > ROUNDS_MAX)
+    count = ROUNDS_MAX;
+
+  /* Compute how much space we need.  */
+  size_t output_len = 10; /* $sm3$ssss\0 */
+  if (count != ROUNDS_DEFAULT)
+    {
+      output_len += 9; /* rounds=1$ */
+      for (unsigned long ceiling = 10; ceiling < count; ceiling *= 10)
+        output_len += 1;
+    }
+  if (output_size < output_len)
+    {
+      errno = ERANGE;
+      return;
+    }
+
+  size_t written;
+  if (count == ROUNDS_DEFAULT)
+    written = (size_t) snprintf ((char *)output, output_size, "$%s$", "sm3");
+  else
+    written = (size_t) snprintf ((char *)output, output_size,
+                                 "$%s$rounds=%lu$", "sm3", count);
+
+  /* The length calculation above should ensure that this is always true.  */
+  assert (written + 5 < output_size);
+
+  size_t used_rbytes = 0;
+  while (written + 5 < output_size &&
+         used_rbytes + 3 < nrbytes &&
+         (used_rbytes * 4 / 3) < SALT_LEN_MAX)
+    {
+      unsigned long value =
+        ((unsigned long) (unsigned char) rbytes[used_rbytes + 0] <<  0) |
+        ((unsigned long) (unsigned char) rbytes[used_rbytes + 1] <<  8) |
+        ((unsigned long) (unsigned char) rbytes[used_rbytes + 2] << 16);
+
+      output[written + 0] = ascii64[value & 0x3f];
+      output[written + 1] = ascii64[(value >> 6) & 0x3f];
+      output[written + 2] = ascii64[(value >> 12) & 0x3f];
+      output[written + 3] = ascii64[(value >> 18) & 0x3f];
+
+      written += 4;
+      used_rbytes += 3;
+    }
+
+  output[written] = '\0';
+}
+
+#endif
diff --git a/lib/hashes.conf b/lib/hashes.conf
index 094f7cc..2676c24 100644
--- a/lib/hashes.conf
+++ b/lib/hashes.conf
@@ -48,6 +48,7 @@ bcrypt_a       $2a$      16       STRONG,ALT,FREEBSD,NETBSD,OPENBSD,OWL,SOLARIS,
 bcrypt_x       $2x$      16       ALT,OWL,SUSE
 sha512crypt    $6$       15       STRONG,DEFAULT,GLIBC,FREEBSD,SOLARIS
 sha256crypt    $5$       15       GLIBC,FREEBSD,SOLARIS
+sm3crypt       $sm3$     15       STRONG
 sha1crypt      $sha1     20       NETBSD
 sunmd5         $md5      8        SOLARIS
 md5crypt       $1$       9        GLIBC,FREEBSD,NETBSD,OPENBSD,SOLARIS
diff --git a/libxcrypt.spec.rpkg b/libxcrypt.spec.rpkg
index 8d3fd06..7e86b99 100644
--- a/libxcrypt.spec.rpkg
+++ b/libxcrypt.spec.rpkg
@@ -170,7 +170,7 @@ Recommends:     mkpasswd
 %description
 libxcrypt is a modern library for one-way hashing of passwords.  It
 supports a wide variety of both modern and historical hashing methods:
-yescrypt, gost-yescrypt, scrypt, bcrypt, sha512crypt, sha256crypt,
+yescrypt, gost-yescrypt, scrypt, bcrypt, sha512crypt, sha256crypt, sm3crypt
 md5crypt, SunMD5, sha1crypt, NT, bsdicrypt, bigcrypt, and descrypt.
 It provides the traditional Unix crypt and crypt_r interfaces, as well
 as a set of extended interfaces pioneered by Openwall Linux, crypt_rn,
diff --git a/test/alg-sm3.c b/test/alg-sm3.c
new file mode 100644
index 0000000..910a7dd
--- /dev/null
+++ b/test/alg-sm3.c
@@ -0,0 +1,124 @@
+#include "crypt-port.h"
+#include "alg-sm3.h"
+
+#include <stdio.h>
+
+#if INCLUDE_sm3crypt
+
+static const struct
+{
+  const char *input;
+  const char result[32];
+} tests[] =
+{
+  /* Test vectors from FIPS 180-2: appendix B.1.  */
+  {
+    "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"
+  },
+  /* Test vectors from FIPS 180-2: appendix B.2.  */
+  {
+    "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"
+  },
+  /* Test vectors from the NESSIE project.  */
+  {
+    "",
+    "\x1a\xb2\x1d\x83\x55\xcf\xa1\x7f\x8e\x61\x19\x48\x31\xe8\x1a\x8f"
+    "\x22\xbe\xc8\xc7\x28\xfe\xfb\x74\x7e\xd0\x35\xeb\x50\x82\xaa\x2b"
+  },
+  {
+    "a",
+    "\x62\x34\x76\xac\x18\xf6\x5a\x29\x09\xe4\x3c\x7f\xec\x61\xb4\x9c"
+    "\x7e\x76\x4a\x91\xa1\x8c\xcb\x82\xf1\x91\x7a\x29\xc8\x6c\x5e\x88"
+  },
+  {
+    "message digest",
+    "\xc5\x22\xa9\x42\xe8\x9b\xd8\x0d\x97\xdd\x66\x6e\x7a\x55\x31\xb3"
+    "\x61\x88\xc9\x81\x71\x49\xe9\xb2\x58\xdf\xe5\x1e\xce\x98\xed\x77"
+  },
+  {
+    "abcdefghijklmnopqrstuvwxyz",
+    "\xb8\x0f\xe9\x7a\x4d\xa2\x4a\xfc\x27\x75\x64\xf6\x6a\x35\x9e\xf4"
+    "\x40\x46\x2a\xd2\x8d\xcc\x6d\x63\xad\xb2\x4d\x5c\x20\xa6\x15\x95"
+  },
+  {
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
+    "\x29\x71\xd1\x0c\x88\x42\xb7\x0c\x97\x9e\x55\x06\x34\x80\xc5\x0b"
+    "\xac\xff\xd9\x0e\x98\xe2\xe6\x0d\x25\x12\xab\x8a\xbf\xdf\xce\xc5"
+  },
+  {
+    "123456789012345678901234567890123456789012345678901234567890"
+    "12345678901234567890",
+    "\xad\x81\x80\x53\x21\xf3\xe6\x9d\x25\x12\x35\xbf\x88\x6a\x56\x48"
+    "\x44\x87\x3b\x56\xdd\x7d\xde\x40\x0f\x05\x5b\x7d\xde\x39\x30\x7a"
+  }
+};
+
+
+static void
+report_failure(int n, const char *tag,
+               const char expected[32], uint8_t actual[32])
+{
+  int i;
+  printf ("FAIL: test %d (%s):\n  exp:", n, tag);
+  for (i = 0; i < 32; i++)
+    {
+      if (i % 4 == 0)
+        putchar (' ');
+      printf ("%02x", (unsigned int)(unsigned char)expected[i]);
+    }
+  printf ("\n  got:");
+  for (i = 0; i < 32; i++)
+    {
+      if (i % 4 == 0)
+        putchar (' ');
+      printf ("%02x", (unsigned int)(unsigned char)actual[i]);
+    }
+  putchar ('\n');
+  putchar ('\n');
+}
+
+int
+main (void)
+{
+  SM3_CTX ctx;
+  uint8_t sum[32];
+  int result = 0;
+  int cnt;
+  int i;
+
+  for (cnt = 0; cnt < (int) ARRAY_SIZE (tests); ++cnt)
+    {
+      SM3_Buf (tests[cnt].input, strlen (tests[cnt].input), sum);
+      if (memcmp (tests[cnt].result, sum, 32) != 0)
+        {
+          report_failure (cnt, "all at once", tests[cnt].result, sum);
+          result = 1;
+        }
+
+      SM3_Init (&ctx);
+      for (i = 0; tests[cnt].input[i] != '\0'; ++i)
+        SM3_Update (&ctx, &tests[cnt].input[i], 1);
+      SM3_Final (sum, &ctx);
+      if (memcmp (tests[cnt].result, sum, 32) != 0)
+        {
+          report_failure (cnt, "byte by byte", tests[cnt].result, sum);
+          result = 1;
+        }
+    }
+
+  return result;
+}
+
+#else
+
+int
+main (void)
+{
+  return 77; /* UNSUPPORTED */
+}
+
+#endif
diff --git a/test/badsetting.c b/test/badsetting.c
index 4af151a..0cfc6c5 100644
--- a/test/badsetting.c
+++ b/test/badsetting.c
@@ -101,6 +101,15 @@ static const struct testcase testcases[] =
   { "$5$", 0, 0, 0 },
 #endif
 
+  /* SM3 */
+#if INCLUDE_sm3crypt
+  { "$sm3",  0,          0, 0 },  // truncated prefix
+  { "$sm3$", 0,          2, 0 },  // inadequate rbytes
+  { "$sm3$", 0,          0, 4 },  // inadequate osize
+#else
+  { "$sm3$", 0, 0, 0 },
+#endif
+
   /* SHA512 */
 #if INCLUDE_sha512crypt
   { "$6",  0,          0, 0 },  // truncated prefix
diff --git a/test/checksalt.c b/test/checksalt.c
index e220bb3..f97296c 100644
--- a/test/checksalt.c
+++ b/test/checksalt.c
@@ -68,6 +68,11 @@ static const struct testcase testcases[] =
 #else
   { "$5$",   CRYPT_SALT_INVALID,       CRYPT_SALT_INVALID,       CRYPT_SALT_INVALID       },
 #endif
+#if INCLUDE_sm3crypt
+  { "$sm3$",   CRYPT_SALT_OK,      CRYPT_SALT_OK,      CRYPT_SALT_OK      },
+#else
+  { "$sm3$",   CRYPT_SALT_INVALID, CRYPT_SALT_INVALID, CRYPT_SALT_INVALID },
+#endif
 #if INCLUDE_sha512crypt
   { "$6$",   CRYPT_SALT_OK,            CRYPT_SALT_OK,            CRYPT_SALT_OK            },
 #else
diff --git a/test/crypt-badargs.c b/test/crypt-badargs.c
index 8b743f6..3d081b7 100644
--- a/test/crypt-badargs.c
+++ b/test/crypt-badargs.c
@@ -50,6 +50,10 @@ static const char *settings[] =
   "$5$MJHnaAkegEVYHsFK",
   "$5$rounds=10191$MJHnaAkegEVYHsFK",
 #endif
+#if INCLUDE_sm3crypt
+  "$sm3$MJHnaAkegEVYHsFK",
+  "$sm3$rounds=10191$MJHnaAkegEVYHsFK",
+#endif
 #if INCLUDE_sha512crypt
   "$6$MJHnaAkegEVYHsFK",
   "$6$rounds=10191$MJHnaAkegEVYHsFK",
diff --git a/test/gensalt-extradata.c b/test/gensalt-extradata.c
index 9df2e9f..3e492e5 100644
--- a/test/gensalt-extradata.c
+++ b/test/gensalt-extradata.c
@@ -61,6 +61,9 @@ static const struct testcase testcases[] =
 #if INCLUDE_sha256crypt
   { "$5$", 7019, 1120211 },
 #endif
+#if INCLUDE_sm3crypt
+  { "$sm3$", 7019, 1120211 },
+#endif
 #if INCLUDE_sha512crypt
   { "$6$", 7019, 1120211 },
 #endif
diff --git a/test/gensalt.c b/test/gensalt.c
index 834ccf5..e4c9624 100644
--- a/test/gensalt.c
+++ b/test/gensalt.c
@@ -140,6 +140,36 @@ static const char *const sha256_expected_output_h[] =
   "$5$rounds=999999999$UqGBkVu01rurVZqg"
 };
 #endif
+#if INCLUDE_sm3crypt
+static const char *const sm3_expected_output[] =
+{
+  "$sm3$MJHnaAkegEVYHsFK",
+  "$sm3$PKXc3hCOSyMqdaEQ",
+  "$sm3$ZAFlICwYRETzIzIj",
+  "$sm3$UqGBkVu01rurVZqg"
+};
+static const char *const sm3_expected_output_r[] =
+{
+  "$sm3$rounds=10191$MJHnaAkegEVYHsFK",
+  "$sm3$rounds=10191$PKXc3hCOSyMqdaEQ",
+  "$sm3$rounds=10191$ZAFlICwYRETzIzIj",
+  "$sm3$rounds=10191$UqGBkVu01rurVZqg"
+};
+static const char *const sm3_expected_output_l[] =
+{
+  "$sm3$rounds=1000$MJHnaAkegEVYHsFK",
+  "$sm3$rounds=1000$PKXc3hCOSyMqdaEQ",
+  "$sm3$rounds=1000$ZAFlICwYRETzIzIj",
+  "$sm3$rounds=1000$UqGBkVu01rurVZqg"
+};
+static const char *const sm3_expected_output_h[] =
+{
+  "$sm3$rounds=999999999$MJHnaAkegEVYHsFK",
+  "$sm3$rounds=999999999$PKXc3hCOSyMqdaEQ",
+  "$sm3$rounds=999999999$ZAFlICwYRETzIzIj",
+  "$sm3$rounds=999999999$UqGBkVu01rurVZqg"
+};
+#endif
 #if INCLUDE_sha512crypt
 static const char *const sha512_expected_output[] =
 {
@@ -291,7 +321,7 @@ struct testcase
 };
 
 // For all hashing methods with a linear cost parameter (that is,
-// DES/BSD, MD5/Sun, SHA1, SHA256, and SHA512), crypt_gensalt will
+// DES/BSD, MD5/Sun, SHA1, SHA256, SM3 and SHA512), crypt_gensalt will
 // accept any value in the range of 'unsigned long' and clip it to the
 // actual valid range.
 #define MIN_LINEAR_COST 1
@@ -338,6 +368,12 @@ static const struct testcase testcases[] =
   { "$5$",   sha256_expected_output_l, 31,  0, MIN_LINEAR_COST },
   { "$5$",   sha256_expected_output_h, 36,  0, MAX_LINEAR_COST },
 #endif
+#if INCLUDE_sm3crypt
+  { "$sm3$",   sm3_expected_output,   21,  0, 0 },
+  { "$sm3$",   sm3_expected_output_r, 34,  0, 10191 },
+  { "$sm3$",   sm3_expected_output_l, 33,  0, MIN_LINEAR_COST },
+  { "$sm3$",   sm3_expected_output_h, 38,  0, MAX_LINEAR_COST },
+#endif
 #if INCLUDE_sha512crypt
   { "$6$",   sha512_expected_output,   19,  0, 0 },
   { "$6$",   sha512_expected_output_r, 32,  0, 10191 },
-- 
2.27.0