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, 0xaa, 0x3e, 0x68, 0xed, 0x81, 0x73, 0xa0, 0xee, 0xd0, 0x66, 0x84,
31 0x99, 0xaa, 0x3e, 0x68,
32 };
33
34 /* Example plaintext to encrypt */
35 static const unsigned char cbc_pt[] = {
36 0xf5, 0x6e, 0x87, 0x05, 0x5b, 0xc3, 0x2d, 0x0e, 0xeb, 0x31, 0xb2, 0xea,
37 0xcc, 0x2b, 0xf2, 0xa5
38 };
39
40 /* Expected ciphertext value */
41 static const unsigned char cbc_ct[] = {
42 0x9a, 0x44, 0xe6, 0x85, 0x94, 0x26, 0xff, 0x30, 0x03, 0xd3, 0x7e, 0xc6,
43 0xb5, 0x4a, 0x09, 0x66, 0x39, 0x28, 0xf3, 0x67, 0x14, 0xbc, 0xe8, 0xe2,
44 0xcf, 0x31, 0xb8, 0x60, 0x42, 0x72, 0x6d, 0xc8
45 };
46
47 /*
48 * A library context and property query can be used to select & filter
49 * algorithm implementations. If they are NULL then the default library
50 * context and properties are used.
51 */
52 static OSSL_LIB_CTX *libctx = NULL;
53 static const char *propq = NULL;
54
aria_cbc_encrypt(void)55 static int aria_cbc_encrypt(void)
56 {
57 int ret = 0;
58 EVP_CIPHER_CTX *ctx;
59 EVP_CIPHER *cipher = NULL;
60 int outlen, tmplen;
61 unsigned char outbuf[1024];
62
63 printf("ARIA CBC Encrypt:\n");
64 printf("Plaintext:\n");
65 BIO_dump_fp(stdout, cbc_pt, sizeof(cbc_pt));
66
67 /* Create a context for the encrypt operation */
68 if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
69 goto err;
70
71 /* Fetch the cipher implementation */
72 if ((cipher = EVP_CIPHER_fetch(libctx, "ARIA-256-CBC", propq)) == NULL)
73 goto err;
74
75 /*
76 * Initialise an encrypt operation with the cipher/mode, key and IV.
77 * We are not setting any custom params so let params be just NULL.
78 */
79 if (!EVP_EncryptInit_ex2(ctx, cipher, cbc_key, cbc_iv, /* params */ NULL))
80 goto err;
81
82 /* Encrypt plaintext */
83 if (!EVP_EncryptUpdate(ctx, outbuf, &outlen, cbc_pt, sizeof(cbc_pt)))
84 goto err;
85
86 /* Finalise: there can be some additional output from padding */
87 if (!EVP_EncryptFinal_ex(ctx, outbuf + outlen, &tmplen))
88 goto err;
89 outlen += tmplen;
90
91 /* Output encrypted block */
92 printf("Ciphertext (outlen:%d):\n", outlen);
93 BIO_dump_fp(stdout, outbuf, outlen);
94
95 if (sizeof(cbc_ct) == outlen && !CRYPTO_memcmp(outbuf, cbc_ct, outlen))
96 printf("Final ciphertext matches expected ciphertext\n");
97 else
98 printf("Final ciphertext differs from expected ciphertext\n");
99
100 ret = 1;
101 err:
102 if (!ret)
103 ERR_print_errors_fp(stderr);
104
105 EVP_CIPHER_free(cipher);
106 EVP_CIPHER_CTX_free(ctx);
107
108 return ret;
109 }
110
aria_cbc_decrypt(void)111 static int aria_cbc_decrypt(void)
112 {
113 int ret = 0;
114 EVP_CIPHER_CTX *ctx;
115 EVP_CIPHER *cipher = NULL;
116 int outlen, tmplen;
117 unsigned char outbuf[1024];
118
119 printf("ARIA CBC Decrypt:\n");
120 printf("Ciphertext:\n");
121 BIO_dump_fp(stdout, cbc_ct, sizeof(cbc_ct));
122
123 if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
124 goto err;
125
126 /* Fetch the cipher implementation */
127 if ((cipher = EVP_CIPHER_fetch(libctx, "ARIA-256-CBC", propq)) == NULL)
128 goto err;
129
130 /*
131 * Initialise an encrypt operation with the cipher/mode, key and IV.
132 * We are not setting any custom params so let params be just NULL.
133 */
134 if (!EVP_DecryptInit_ex2(ctx, cipher, cbc_key, cbc_iv, /* params */ NULL))
135 goto err;
136
137 /* Decrypt plaintext */
138 if (!EVP_DecryptUpdate(ctx, outbuf, &outlen, cbc_ct, sizeof(cbc_ct)))
139 goto err;
140
141 /* Finalise: there can be some additional output from padding */
142 if (!EVP_DecryptFinal_ex(ctx, outbuf + outlen, &tmplen))
143 goto err;
144 outlen += tmplen;
145
146 /* Output decrypted block */
147 printf("Plaintext (outlen:%d):\n", outlen);
148 BIO_dump_fp(stdout, outbuf, outlen);
149
150 if (sizeof(cbc_pt) == outlen && !CRYPTO_memcmp(outbuf, cbc_pt, outlen))
151 printf("Final plaintext matches original plaintext\n");
152 else
153 printf("Final plaintext differs from original plaintext\n");
154
155 ret = 1;
156 err:
157 if (!ret)
158 ERR_print_errors_fp(stderr);
159
160 EVP_CIPHER_free(cipher);
161 EVP_CIPHER_CTX_free(ctx);
162
163 return ret;
164 }
165
main(int argc,char ** argv)166 int main(int argc, char **argv)
167 {
168 if (!aria_cbc_encrypt())
169 return EXIT_FAILURE;
170
171 if (!aria_cbc_decrypt())
172 return EXIT_FAILURE;
173
174 return EXIT_SUCCESS;
175 }
176
