1 /*
2 * Copyright 2012-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /*
11 * Simple ARIA CBC encryption demonstration program.
12 */
13
14 #include <stdio.h>
15 #include <openssl/err.h>
16 #include <openssl/bio.h>
17 #include <openssl/evp.h>
18 #include <openssl/crypto.h>
19 #include <openssl/core_names.h>
20
21 /* ARIA key */
22 static const unsigned char cbc_key[] = {
23 0xee, 0xbc, 0x1f, 0x57, 0x48, 0x7f, 0x51, 0x92, 0x1c, 0x04, 0x65, 0x66,
24 0x5f, 0x8a, 0xe6, 0xd1, 0x65, 0x8b, 0xb2, 0x6d, 0xe6, 0xf8, 0xa0, 0x69,
25 0xa3, 0x52, 0x02, 0x93, 0xa5, 0x72, 0x07, 0x8f
26 };
27
28 /* Unique initialisation vector */
29 static const unsigned char cbc_iv[] = {
30 0x99,
31 0xaa,
32 0x3e,
33 0x68,
34 0xed,
35 0x81,
36 0x73,
37 0xa0,
38 0xee,
39 0xd0,
40 0x66,
41 0x84,
42 0x99,
43 0xaa,
44 0x3e,
45 0x68,
46 };
47
48 /* Example plaintext to encrypt */
49 static const unsigned char cbc_pt[] = {
50 0xf5, 0x6e, 0x87, 0x05, 0x5b, 0xc3, 0x2d, 0x0e, 0xeb, 0x31, 0xb2, 0xea,
51 0xcc, 0x2b, 0xf2, 0xa5
52 };
53
54 /* Expected ciphertext value */
55 static const unsigned char cbc_ct[] = {
56 0x9a, 0x44, 0xe6, 0x85, 0x94, 0x26, 0xff, 0x30, 0x03, 0xd3, 0x7e, 0xc6,
57 0xb5, 0x4a, 0x09, 0x66, 0x39, 0x28, 0xf3, 0x67, 0x14, 0xbc, 0xe8, 0xe2,
58 0xcf, 0x31, 0xb8, 0x60, 0x42, 0x72, 0x6d, 0xc8
59 };
60
61 /*
62 * A library context and property query can be used to select & filter
63 * algorithm implementations. If they are NULL then the default library
64 * context and properties are used.
65 */
66 static OSSL_LIB_CTX *libctx = NULL;
67 static const char *propq = NULL;
68
aria_cbc_encrypt(void)69 static int aria_cbc_encrypt(void)
70 {
71 int ret = 0;
72 EVP_CIPHER_CTX *ctx;
73 EVP_CIPHER *cipher = NULL;
74 int outlen, tmplen;
75 unsigned char outbuf[1024];
76
77 printf("ARIA CBC Encrypt:\n");
78 printf("Plaintext:\n");
79 BIO_dump_fp(stdout, cbc_pt, sizeof(cbc_pt));
80
81 /* Create a context for the encrypt operation */
82 if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
83 goto err;
84
85 /* Fetch the cipher implementation */
86 if ((cipher = EVP_CIPHER_fetch(libctx, "ARIA-256-CBC", propq)) == NULL)
87 goto err;
88
89 /*
90 * Initialise an encrypt operation with the cipher/mode, key and IV.
91 * We are not setting any custom params so let params be just NULL.
92 */
93 if (!EVP_EncryptInit_ex2(ctx, cipher, cbc_key, cbc_iv, /* params */ NULL))
94 goto err;
95
96 /* Encrypt plaintext */
97 if (!EVP_EncryptUpdate(ctx, outbuf, &outlen, cbc_pt, sizeof(cbc_pt)))
98 goto err;
99
100 /* Finalise: there can be some additional output from padding */
101 if (!EVP_EncryptFinal_ex(ctx, outbuf + outlen, &tmplen))
102 goto err;
103 outlen += tmplen;
104
105 /* Output encrypted block */
106 printf("Ciphertext (outlen:%d):\n", outlen);
107 BIO_dump_fp(stdout, outbuf, outlen);
108
109 if (sizeof(cbc_ct) == outlen && !CRYPTO_memcmp(outbuf, cbc_ct, outlen))
110 printf("Final ciphertext matches expected ciphertext\n");
111 else
112 printf("Final ciphertext differs from expected ciphertext\n");
113
114 ret = 1;
115 err:
116 if (!ret)
117 ERR_print_errors_fp(stderr);
118
119 EVP_CIPHER_free(cipher);
120 EVP_CIPHER_CTX_free(ctx);
121
122 return ret;
123 }
124
aria_cbc_decrypt(void)125 static int aria_cbc_decrypt(void)
126 {
127 int ret = 0;
128 EVP_CIPHER_CTX *ctx;
129 EVP_CIPHER *cipher = NULL;
130 int outlen, tmplen;
131 unsigned char outbuf[1024];
132
133 printf("ARIA CBC Decrypt:\n");
134 printf("Ciphertext:\n");
135 BIO_dump_fp(stdout, cbc_ct, sizeof(cbc_ct));
136
137 if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
138 goto err;
139
140 /* Fetch the cipher implementation */
141 if ((cipher = EVP_CIPHER_fetch(libctx, "ARIA-256-CBC", propq)) == NULL)
142 goto err;
143
144 /*
145 * Initialise an encrypt operation with the cipher/mode, key and IV.
146 * We are not setting any custom params so let params be just NULL.
147 */
148 if (!EVP_DecryptInit_ex2(ctx, cipher, cbc_key, cbc_iv, /* params */ NULL))
149 goto err;
150
151 /* Decrypt plaintext */
152 if (!EVP_DecryptUpdate(ctx, outbuf, &outlen, cbc_ct, sizeof(cbc_ct)))
153 goto err;
154
155 /* Finalise: there can be some additional output from padding */
156 if (!EVP_DecryptFinal_ex(ctx, outbuf + outlen, &tmplen))
157 goto err;
158 outlen += tmplen;
159
160 /* Output decrypted block */
161 printf("Plaintext (outlen:%d):\n", outlen);
162 BIO_dump_fp(stdout, outbuf, outlen);
163
164 if (sizeof(cbc_pt) == outlen && !CRYPTO_memcmp(outbuf, cbc_pt, outlen))
165 printf("Final plaintext matches original plaintext\n");
166 else
167 printf("Final plaintext differs from original plaintext\n");
168
169 ret = 1;
170 err:
171 if (!ret)
172 ERR_print_errors_fp(stderr);
173
174 EVP_CIPHER_free(cipher);
175 EVP_CIPHER_CTX_free(ctx);
176
177 return ret;
178 }
179
main(int argc,char ** argv)180 int main(int argc, char **argv)
181 {
182 if (!aria_cbc_encrypt())
183 return EXIT_FAILURE;
184
185 if (!aria_cbc_decrypt())
186 return EXIT_FAILURE;
187
188 return EXIT_SUCCESS;
189 }
190