From 8ba65c35ea3af347c3b2adc8e665066b541a1c35 Mon Sep 17 00:00:00 2001
From: "Mingjun.Yang" <yangmingjun@uniontech.com>
Date: Mon, 6 Sep 2021 15:30:19 +0800
Subject: [PATCH] Add sm2 encryption test case from GM/T 0003.5-2012

Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/16511)
---
 test/sm2_internal_test.c | 41 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/test/sm2_internal_test.c b/test/sm2_internal_test.c
index 22d23b6c5c..4899d5e213 100644
--- a/test/sm2_internal_test.c
+++ b/test/sm2_internal_test.c
@@ -209,6 +209,7 @@ static int test_sm2_crypt(const EC_GROUP *group,
 static int sm2_crypt_test(void)
 {
     int testresult = 0;
+    EC_GROUP *gm_group = NULL;
     EC_GROUP *test_group =
         create_EC_group
         ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
@@ -251,9 +252,49 @@ static int sm2_crypt_test(void)
             "88E3C5AAFC0413229E6C9AEE2BB92CAD649FE2C035689785DA33"))
         goto done;
 
+    /* From Annex C in both GM/T0003.5-2012 and GB/T 32918.5-2016.*/
+    gm_group = create_EC_group(
+         "fffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",
+         "fffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",
+         "28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",
+         "32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",
+         "bc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",
+         "fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",
+         "1");
+
+    if (!TEST_ptr(gm_group))
+        goto done;
+
+    if (!test_sm2_crypt(
+            gm_group,
+            EVP_sm3(),
+            /* privkey (from which the encrypting public key is derived) */
+            "3945208F7B2144B13F36E38AC6D39F95889393692860B51A42FB81EF4DF7C5B8",
+            /* plaintext message */
+            "encryption standard",
+            /* ephemeral nonce k */
+            "59276E27D506861A16680F3AD9C02DCCEF3CC1FA3CDBE4CE6D54B80DEAC1BC21",
+            /*
+             * expected ciphertext, the field values are from GM/T 0003.5-2012
+             * (Annex C), but serialized following the ASN.1 format specified
+             * in GM/T 0009-2012 (Sec. 7.2).
+             */
+            "307C" /* SEQUENCE, 0x7c bytes */
+              "0220" /* INTEGER, 0x20 bytes */
+                "04EBFC718E8D1798620432268E77FEB6415E2EDE0E073C0F4F640ECD2E149A73"
+              "0221" /* INTEGER, 0x21 bytes */
+                "00" /* leading 00 due to DER for pos. int with topmost bit set */
+                "E858F9D81E5430A57B36DAAB8F950A3C64E6EE6A63094D99283AFF767E124DF0"
+              "0420" /* OCTET STRING, 0x20 bytes */
+                "59983C18F809E262923C53AEC295D30383B54E39D609D160AFCB1908D0BD8766"
+              "0413" /* OCTET STRING, 0x13 bytes */
+                "21886CA989CA9C7D58087307CA93092D651EFA"))
+        goto done;
+
     testresult = 1;
  done:
     EC_GROUP_free(test_group);
+    EC_GROUP_free(gm_group);
 
     return testresult;
 }
-- 
2.34.1