And soft RNG to cmake

tests/sm4_cbc_mactest.c

@@ -0,0 +1,87 @@
+/*
+ *  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/mem.h>
+#include <gmssl/rand.h>
+#include <gmssl/error.h>
+#include <gmssl/sm4_cbc_mac.h>
+
+static int test_sm4_cbc_mac(void)
+{
+	SM4_KEY sm4_key;
+	SM4_CBC_MAC_CTX ctx;
+	uint8_t key[16];
+	uint8_t iv[16] = {0};
+	uint8_t m[128];
+	uint8_t c[128];
+	uint8_t mac1[16];
+	uint8_t mac2[16];
+	uint8_t *p;
+	size_t len, left;
+
+	rand_bytes(key, sizeof(key));
+	rand_bytes(m, sizeof(m));
+	sm4_set_encrypt_key(&sm4_key, key);
+
+	// test 1
+	sm4_cbc_encrypt(&sm4_key, iv, m, sizeof(m)/16, c);
+	memcpy(mac1, c + sizeof(m) - 16, 16);
+
+	sm4_cbc_mac_init(&ctx, key);
+	p = m;
+	len = 0;
+	left = sizeof(m);
+	while (left) {
+		len = left < len ? left : len;
+		sm4_cbc_mac_update(&ctx, p, len);
+		p += len;
+		left -= len;
+		len++;
+	}
+	sm4_cbc_mac_finish(&ctx, mac2);
+	if (memcmp(mac1, mac2, 16)) {
+		error_print();
+		return -1;
+	}
+
+	// test 2
+	m[sizeof(m) - 1] = 0;
+	sm4_cbc_encrypt(&sm4_key, iv, m, sizeof(m)/16, c);
+	memcpy(mac1, c + sizeof(m) - 16, 16);
+
+	sm4_cbc_mac_init(&ctx, key);
+	p = m;
+	len = 0;
+	left = sizeof(m) - 1;
+	while (left) {
+		len = left < len ? left : len;
+		sm4_cbc_mac_update(&ctx, p, len);
+		p += len;
+		left -= len;
+		len++;
+	}
+	sm4_cbc_mac_finish(&ctx, mac2);
+	if (memcmp(mac1, mac2, 16)) {
+		error_print();
+		return -1;
+	}
+
+	printf("%s() ok\n", __FUNCTION__);
+	return 1;
+}
+
+int main(void)
+{
+	if (test_sm4_cbc_mac() != 1) { error_print(); return -1; }
+	return 0;
+}