Update SM2 Extensions

Arrange source files

tests/sm2_recovertest.c

@@ -0,0 +1,44 @@
+/*
+ *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the License); you may
+ *  not use this file except in compliance with the License.
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <gmssl/sm2.h>
+#include <gmssl/sm2_recover.h>
+#include <gmssl/error.h>
+
+
+static int test_sm2_signature_to_public_key_points(void)
+{
+	SM2_KEY key;
+	uint8_t dgst[32] = {1,2,3,4};
+	SM2_SIGNATURE sig;
+	SM2_POINT points[4];
+	size_t points_cnt, i;
+
+	sm2_key_generate(&key);
+	sm2_do_sign(&key, dgst, &sig);
+	sm2_signature_to_public_key_points(&sig, dgst, points, &points_cnt);
+
+	for (i = 0; i < points_cnt; i++) {
+		int vr;
+		sm2_point_print(stderr, 0, 0, "point", &points[i]);
+		vr = sm2_do_verify((SM2_KEY *)&points[1], dgst, &sig);
+		printf("verify = %d\n", vr);
+	}
+	return 1;
+}
+
+int main(void)
+{
+	if (test_sm2_signature_to_public_key_points() != 1) { error_print(); return -1; }
+	return 0;
+}