lib/crypto: tests: Add KUnit tests for SM3

Add a KUnit test suite for the SM3 library.  It closely mirrors the test
suites for the other cryptographic hash functions.  The actual test and
benchmark logic is already in hash-test-template.h; this just wires it
up for SM3 in the usual way.

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260321040935.410034-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

lib/crypto/.kunitconfig

@@ -16,3 +16,4 @@ CONFIG_CRYPTO_LIB_SHA1_KUNIT_TEST=y
 CONFIG_CRYPTO_LIB_SHA256_KUNIT_TEST=y
 CONFIG_CRYPTO_LIB_SHA512_KUNIT_TEST=y
 CONFIG_CRYPTO_LIB_SHA3_KUNIT_TEST=y
+CONFIG_CRYPTO_LIB_SM3_KUNIT_TEST=y

lib/crypto/tests/Kconfig

@@ -124,6 +124,14 @@ config CRYPTO_LIB_SHA3_KUNIT_TEST
 	  including SHA3-224, SHA3-256, SHA3-384, SHA3-512, SHAKE128 and
 	  SHAKE256.
 
+config CRYPTO_LIB_SM3_KUNIT_TEST
+	tristate "KUnit tests for SM3" if !KUNIT_ALL_TESTS
+	depends on KUNIT && CRYPTO_LIB_SM3
+	default KUNIT_ALL_TESTS
+	select CRYPTO_LIB_BENCHMARK_VISIBLE
+	help
+	  KUnit tests for the SM3 cryptographic hash function.
+
 config CRYPTO_LIB_ENABLE_ALL_FOR_KUNIT
 	tristate "Enable all crypto library code for KUnit tests"
 	depends on KUNIT
@@ -139,6 +147,7 @@ config CRYPTO_LIB_ENABLE_ALL_FOR_KUNIT
 	select CRYPTO_LIB_SHA256
 	select CRYPTO_LIB_SHA512
 	select CRYPTO_LIB_SHA3
+	select CRYPTO_LIB_SM3
 	help
 	  Enable all the crypto library code that has KUnit tests.
 

lib/crypto/tests/Makefile

@@ -14,3 +14,4 @@ obj-$(CONFIG_CRYPTO_LIB_SHA1_KUNIT_TEST) += sha1_kunit.o
 obj-$(CONFIG_CRYPTO_LIB_SHA256_KUNIT_TEST) += sha224_kunit.o sha256_kunit.o
 obj-$(CONFIG_CRYPTO_LIB_SHA512_KUNIT_TEST) += sha384_kunit.o sha512_kunit.o
 obj-$(CONFIG_CRYPTO_LIB_SHA3_KUNIT_TEST) += sha3_kunit.o
+obj-$(CONFIG_CRYPTO_LIB_SM3_KUNIT_TEST) += sm3_kunit.o

lib/crypto/tests/sm3-testvecs.h

@@ -0,0 +1,231 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* This file was generated by: ./scripts/crypto/gen-hash-testvecs.py sm3 */
+
+static const struct {
+	size_t data_len;
+	u8 digest[SM3_DIGEST_SIZE];
+} hash_testvecs[] = {
+	{
+		.data_len = 0,
+		.digest = {
+			0x1a, 0xb2, 0x1d, 0x83, 0x55, 0xcf, 0xa1, 0x7f,
+			0x8e, 0x61, 0x19, 0x48, 0x31, 0xe8, 0x1a, 0x8f,
+			0x22, 0xbe, 0xc8, 0xc7, 0x28, 0xfe, 0xfb, 0x74,
+			0x7e, 0xd0, 0x35, 0xeb, 0x50, 0x82, 0xaa, 0x2b,
+		},
+	},
+	{
+		.data_len = 1,
+		.digest = {
+			0xb6, 0x22, 0x2c, 0x39, 0xdc, 0x14, 0x9a, 0xee,
+			0x01, 0x9a, 0xcb, 0x0d, 0xe6, 0xc6, 0x75, 0x6e,
+			0x8f, 0x18, 0x7b, 0x0e, 0xe8, 0x98, 0x61, 0x71,
+			0x2b, 0xd8, 0x38, 0xa9, 0xee, 0x2c, 0x1e, 0x93,
+		},
+	},
+	{
+		.data_len = 2,
+		.digest = {
+			0x62, 0x0c, 0x66, 0x77, 0x67, 0x28, 0x74, 0x8a,
+			0xe3, 0x64, 0xea, 0x44, 0x6a, 0x3f, 0x34, 0x61,
+			0x55, 0xc5, 0xaa, 0xb2, 0x6c, 0x67, 0x97, 0x68,
+			0x68, 0xae, 0x4d, 0x64, 0xa8, 0xb6, 0x72, 0x3e,
+		},
+	},
+	{
+		.data_len = 3,
+		.digest = {
+			0x71, 0xd4, 0x63, 0xb1, 0xfa, 0x27, 0xc7, 0xae,
+			0x65, 0xed, 0x5c, 0x93, 0x70, 0xe0, 0x09, 0x34,
+			0x2f, 0x42, 0xe6, 0x71, 0x16, 0x8e, 0x90, 0x90,
+			0x9a, 0xdd, 0xa6, 0x44, 0x66, 0x71, 0x18, 0xf9,
+		},
+	},
+	{
+		.data_len = 16,
+		.digest = {
+			0x79, 0x0b, 0x68, 0xb5, 0x41, 0xc1, 0x97, 0xa0,
+			0x50, 0xe6, 0x93, 0x70, 0xf6, 0x98, 0x49, 0xea,
+			0x92, 0xc9, 0xd0, 0xb1, 0x46, 0xbd, 0x4a, 0x0c,
+			0x8e, 0xe8, 0xf3, 0xe4, 0x8f, 0x90, 0x33, 0x3c,
+		},
+	},
+	{
+		.data_len = 32,
+		.digest = {
+			0x32, 0x9f, 0xa3, 0x18, 0x18, 0x45, 0xe0, 0x28,
+			0xd3, 0xa4, 0x41, 0x3a, 0x25, 0x62, 0x9c, 0x95,
+			0xab, 0xfe, 0x02, 0xe0, 0x37, 0x7d, 0x3c, 0xc4,
+			0xce, 0x69, 0x57, 0x5a, 0x07, 0x0e, 0xb9, 0xf5,
+		},
+	},
+	{
+		.data_len = 48,
+		.digest = {
+			0x0c, 0xcf, 0x7c, 0x48, 0x44, 0xa0, 0xb0, 0x8d,
+			0xdf, 0xbe, 0x22, 0x14, 0x7e, 0xd4, 0xc3, 0x8d,
+			0x6a, 0x23, 0xfc, 0x44, 0x0e, 0x0f, 0xde, 0xa5,
+			0x7c, 0x8b, 0xc4, 0x8b, 0xab, 0x8c, 0x87, 0x41,
+		},
+	},
+	{
+		.data_len = 49,
+		.digest = {
+			0xb3, 0x76, 0x8b, 0x19, 0xf9, 0x10, 0xa9, 0x56,
+			0x4f, 0xce, 0x27, 0xaa, 0x65, 0x96, 0xe5, 0xdb,
+			0x90, 0x9b, 0x92, 0xcd, 0x32, 0x0d, 0x16, 0xac,
+			0xf8, 0xd0, 0x66, 0x62, 0x10, 0xf0, 0x44, 0xdf,
+		},
+	},
+	{
+		.data_len = 63,
+		.digest = {
+			0x07, 0xc9, 0x45, 0x65, 0x9f, 0x68, 0x75, 0xc3,
+			0x74, 0xb2, 0x3b, 0x0c, 0x97, 0x05, 0xd3, 0x13,
+			0xc0, 0xb6, 0x21, 0xed, 0xf6, 0x10, 0x7a, 0xed,
+			0xec, 0xd8, 0x10, 0x29, 0xbf, 0x7a, 0x78, 0x37,
+		},
+	},
+	{
+		.data_len = 64,
+		.digest = {
+			0x3e, 0x69, 0x18, 0x45, 0xd8, 0x25, 0x6f, 0x44,
+			0xc0, 0x02, 0xe5, 0xcf, 0xcd, 0x94, 0x42, 0xa9,
+			0xd5, 0x12, 0x62, 0x10, 0x15, 0xa0, 0xf9, 0x16,
+			0x19, 0x2d, 0x8d, 0x63, 0x31, 0xf2, 0x2f, 0x36,
+		},
+	},
+	{
+		.data_len = 65,
+		.digest = {
+			0x6b, 0x3e, 0xc0, 0x20, 0xb7, 0x74, 0x30, 0xa0,
+			0xc6, 0x5c, 0xee, 0xbe, 0xdc, 0xe6, 0xe5, 0x4f,
+			0x3c, 0x61, 0x8d, 0x91, 0xac, 0x31, 0x4b, 0x2a,
+			0xdf, 0x1c, 0xef, 0x24, 0xdc, 0x0a, 0x10, 0xe8,
+		},
+	},
+	{
+		.data_len = 127,
+		.digest = {
+			0xab, 0xd6, 0xa1, 0xbf, 0x39, 0x43, 0x75, 0xda,
+			0xbf, 0xc7, 0x22, 0xcc, 0x4e, 0xfc, 0xe4, 0x42,
+			0x6d, 0x1b, 0x87, 0x25, 0x64, 0x7f, 0x88, 0xf7,
+			0xc3, 0x0a, 0x0a, 0x4c, 0xd6, 0xa7, 0x68, 0xae,
+		},
+	},
+	{
+		.data_len = 128,
+		.digest = {
+			0x1b, 0x70, 0xd4, 0x5f, 0x6c, 0xe4, 0x2d, 0x58,
+			0x2d, 0x0f, 0x9a, 0x12, 0x34, 0xbb, 0x5e, 0x38,
+			0xd8, 0x1f, 0x6a, 0x46, 0x8a, 0xef, 0xdb, 0x68,
+			0x18, 0x62, 0xbb, 0x85, 0xfc, 0xc4, 0x6e, 0x2e,
+		},
+	},
+	{
+		.data_len = 129,
+		.digest = {
+			0x33, 0x62, 0xba, 0xa7, 0x4a, 0xbc, 0xd7, 0x7b,
+			0xd4, 0x67, 0x6d, 0x3e, 0xea, 0xe8, 0xb0, 0x64,
+			0x0d, 0xf3, 0xae, 0x1d, 0x52, 0x24, 0x11, 0x9f,
+			0xda, 0xa9, 0x7f, 0xd5, 0x22, 0x1a, 0xde, 0x8a,
+		},
+	},
+	{
+		.data_len = 256,
+		.digest = {
+			0x70, 0xa8, 0xa6, 0x2b, 0xfb, 0x1f, 0x3b, 0x5a,
+			0xcc, 0x71, 0x76, 0x9e, 0x25, 0x4c, 0xfa, 0x8f,
+			0x39, 0x4a, 0x21, 0x8a, 0x9d, 0x74, 0x8d, 0x2c,
+			0x31, 0xa5, 0xb5, 0xff, 0x30, 0xc1, 0x14, 0xc4,
+		},
+	},
+	{
+		.data_len = 511,
+		.digest = {
+			0x39, 0xd0, 0x8c, 0x5f, 0xfc, 0x36, 0xc2, 0x7c,
+			0xdb, 0x8b, 0x2e, 0xdc, 0x9d, 0x1b, 0xd1, 0xba,
+			0x9b, 0x52, 0x6b, 0x35, 0x46, 0x46, 0x75, 0x73,
+			0xe5, 0x62, 0x96, 0x6e, 0xf3, 0xba, 0xd9, 0x19,
+		},
+	},
+	{
+		.data_len = 513,
+		.digest = {
+			0x76, 0xa0, 0x3d, 0xa2, 0x5f, 0xd4, 0xa6, 0xbe,
+			0x6b, 0xdb, 0xed, 0x14, 0x9e, 0xa8, 0x15, 0x77,
+			0xa9, 0x38, 0x30, 0x6b, 0x68, 0xfa, 0xb6, 0xe2,
+			0x93, 0x19, 0x24, 0x72, 0x67, 0x20, 0x72, 0xc3,
+		},
+	},
+	{
+		.data_len = 1000,
+		.digest = {
+			0x16, 0xbc, 0x33, 0x77, 0x0b, 0xcf, 0x93, 0x5e,
+			0xec, 0x7d, 0x8d, 0x3c, 0xae, 0xd9, 0x75, 0xdf,
+			0x46, 0x24, 0x17, 0x7e, 0x03, 0x88, 0xf2, 0x75,
+			0xa9, 0x18, 0xa6, 0x1c, 0x7a, 0x74, 0x0d, 0xf3,
+		},
+	},
+	{
+		.data_len = 3333,
+		.digest = {
+			0xdb, 0x54, 0x89, 0xe7, 0x1c, 0x50, 0xf2, 0xbf,
+			0xde, 0x3a, 0xbf, 0x5b, 0xee, 0x5a, 0x46, 0x62,
+			0x20, 0xb1, 0x80, 0x48, 0xac, 0x56, 0x33, 0xb3,
+			0xbb, 0x3f, 0xfa, 0x02, 0xc6, 0x43, 0xb5, 0x8c,
+		},
+	},
+	{
+		.data_len = 4096,
+		.digest = {
+			0xdf, 0x0d, 0xed, 0x3b, 0x8f, 0xea, 0x81, 0xfd,
+			0xd6, 0x34, 0xae, 0x74, 0x24, 0x3a, 0x15, 0x38,
+			0xe7, 0xcf, 0x45, 0x7e, 0x8f, 0xf5, 0x50, 0x6c,
+			0xaa, 0x27, 0x23, 0x92, 0x6d, 0xab, 0x3b, 0xde,
+		},
+	},
+	{
+		.data_len = 4128,
+		.digest = {
+			0x6a, 0xbd, 0x56, 0x5a, 0xf1, 0xc6, 0x40, 0x4d,
+			0xf3, 0x50, 0x77, 0x87, 0x86, 0x63, 0x1b, 0x4d,
+			0x21, 0x99, 0x96, 0xad, 0x24, 0x62, 0xce, 0xc0,
+			0x3e, 0xb7, 0x35, 0x52, 0x56, 0x0e, 0x55, 0x85,
+		},
+	},
+	{
+		.data_len = 4160,
+		.digest = {
+			0x5b, 0xc1, 0x1f, 0x25, 0x43, 0xa3, 0x1c, 0xa0,
+			0x8c, 0xfc, 0x41, 0xf1, 0xcc, 0xb3, 0x95, 0x95,
+			0xe0, 0xb9, 0xd3, 0x29, 0xf4, 0x08, 0x31, 0x47,
+			0x6d, 0x09, 0xa8, 0x2e, 0xa5, 0xf4, 0xf1, 0x8d,
+		},
+	},
+	{
+		.data_len = 4224,
+		.digest = {
+			0xec, 0x56, 0x1e, 0xa6, 0x1f, 0xb2, 0x87, 0xb2,
+			0x7e, 0x15, 0xd6, 0x30, 0x08, 0x74, 0xb0, 0x48,
+			0x90, 0x2a, 0xbe, 0x2f, 0x80, 0x3a, 0x88, 0xcc,
+			0xd7, 0xc5, 0x87, 0x8c, 0x04, 0xef, 0x78, 0x71,
+		},
+	},
+	{
+		.data_len = 16384,
+		.digest = {
+			0xe7, 0xb8, 0x84, 0x20, 0xff, 0xd5, 0x53, 0xe6,
+			0x14, 0x31, 0x12, 0x75, 0xb7, 0x9a, 0x4f, 0x63,
+			0x63, 0x00, 0xfe, 0x2c, 0x54, 0xee, 0x06, 0xfc,
+			0x12, 0x16, 0xe5, 0xdc, 0xa4, 0x40, 0x62, 0x12,
+		},
+	},
+};
+
+static const u8 hash_testvec_consolidated[SM3_DIGEST_SIZE] = {
+	0xe6, 0x58, 0xd4, 0x8e, 0x74, 0x92, 0xdf, 0xfe,
+	0x58, 0x05, 0xe5, 0x29, 0x83, 0xfb, 0xb7, 0x51,
+	0x7e, 0x66, 0x0c, 0x49, 0x3e, 0x11, 0x7e, 0x9b,
+	0xb1, 0x83, 0x3a, 0xa6, 0xb0, 0x3c, 0xf5, 0xe0,
+};

lib/crypto/tests/sm3_kunit.c

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2026 Google LLC
+ */
+#include <crypto/sm3.h>
+#include "sm3-testvecs.h"
+
+#define HASH sm3
+#define HASH_CTX sm3_ctx
+#define HASH_SIZE SM3_DIGEST_SIZE
+#define HASH_INIT sm3_init
+#define HASH_UPDATE sm3_update
+#define HASH_FINAL sm3_final
+#include "hash-test-template.h"
+
+static struct kunit_case sm3_test_cases[] = {
+	HASH_KUNIT_CASES,
+	KUNIT_CASE(benchmark_hash),
+	{},
+};
+
+static struct kunit_suite sm3_test_suite = {
+	.name = "sm3",
+	.test_cases = sm3_test_cases,
+	.suite_init = hash_suite_init,
+	.suite_exit = hash_suite_exit,
+};
+kunit_test_suite(sm3_test_suite);
+
+MODULE_DESCRIPTION("KUnit tests and benchmark for SM3");
+MODULE_LICENSE("GPL");

scripts/crypto/gen-hash-testvecs.py

@@ -356,6 +356,9 @@ elif alg == 'sha3':
     print()
     print('/* SHAKE test vectors */')
     gen_additional_sha3_testvecs()
+elif alg == 'sm3':
+    gen_unkeyed_testvecs(alg)
+    # Kernel doesn't implement HMAC-SM3 library functions yet.
 else:
     gen_unkeyed_testvecs(alg)
     gen_hmac_testvecs(alg)