1 /*
2 * Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the License); you may
5 * not use this file except in compliance with the License.
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 */
9
10 #include <stdio.h>
11 #include <string.h>
12 #include <stdlib.h>
13 #include <gmssl/sm4.h>
14 #include <gmssl/rand.h>
15
16
main(void)17 int main(void)
18 {
19 SM4_KEY sm4_key;
20 unsigned char key[16];
21 unsigned char iv[16];
22 unsigned char ctr[16];
23 unsigned char mbuf[20] = {
24 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,
25 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,
26 0x31,0x32,0x33,0x34,
27 };
28 unsigned char cbuf[20] = {0};
29 unsigned char pbuf[20] = {0};
30 int i;
31
32 rand_bytes(key, sizeof(key));
33 rand_bytes(iv, sizeof(iv));
34
35 printf("key: ");
36 for (i = 0; i < sizeof(key); i++) {
37 printf("%02X", key[i]);
38 }
39 printf("\n");
40
41 printf("ctr: ");
42 for (i = 0; i < sizeof(iv); i++) {
43 printf("%02X", iv[i]);
44 }
45 printf("\n");
46
47 sm4_set_encrypt_key(&sm4_key, key);
48
49 printf("sm4 ctr encrypt %zu bytes\n", sizeof(mbuf));
50
51 printf("plaintext: ");
52 for (i = 0; i < sizeof(mbuf); i++) {
53 printf("%02X", mbuf[i]);
54 }
55 printf("\n");
56
57 memcpy(ctr, iv, 16);
58 sm4_ctr_encrypt(&sm4_key, ctr, mbuf, sizeof(mbuf), cbuf);
59
60 printf("ciphertext: ");
61 for (i = 0; i < sizeof(cbuf); i++) {
62 printf("%02X", cbuf[i]);
63 }
64 printf("\n");
65
66 memcpy(ctr, iv, 16);
67 sm4_ctr_decrypt(&sm4_key, ctr, cbuf, sizeof(cbuf), pbuf);
68
69 printf("decrypted: ");
70 for (i = 0; i < sizeof(pbuf); i++) {
71 printf("%02X", pbuf[i]);
72 }
73 printf("\n");
74
75 return 0;
76 }
77