1 /*
2 * Copyright 2012-2022 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 OSSL_LIB_CTX *libctx = NULL;
53 const char *propq = NULL;
54
aria_cbc_encrypt(void)55 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 size_t cbc_ivlen = sizeof(cbc_iv);
62 unsigned char outbuf[1024];
63 unsigned char outtag[16];
64
65 printf("ARIA CBC Encrypt:\n");
66 printf("Plaintext:\n");
67 BIO_dump_fp(stdout, cbc_pt, sizeof(cbc_pt));
68
69 /* Create a context for the encrypt operation */
70 if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
71 goto err;
72
73 /* Fetch the cipher implementation */
74 if ((cipher = EVP_CIPHER_fetch(libctx, "ARIA-256-CBC", propq)) == NULL)
75 goto err;
76
77 /*
78 * Initialise an encrypt operation with the cipher/mode, key and IV.
79 * We are not setting any custom params so let params be just NULL.
80 */
81 if (!EVP_EncryptInit_ex2(ctx, cipher, cbc_key, cbc_iv, /* params */ NULL))
82 goto err;
83
84 /* Encrypt plaintext */
85 if (!EVP_EncryptUpdate(ctx, outbuf, &outlen, cbc_pt, sizeof(cbc_pt)))
86 goto err;
87
88 /* Finalise: there can be some additional output from padding */
89 if (!EVP_EncryptFinal_ex(ctx, outbuf + outlen, &tmplen))
90 goto err;
91 outlen += tmplen;
92
93 /* Output encrypted block */
94 printf("Ciphertext (outlen:%d):\n", outlen);
95 BIO_dump_fp(stdout, outbuf, outlen);
96
97 if (sizeof(cbc_ct) == outlen && !CRYPTO_memcmp(outbuf, cbc_ct, outlen))
98 printf("Final ciphertext matches expected ciphertext\n");
99 else
100 printf("Final ciphertext differs from expected ciphertext\n");
101
102 ret = 1;
103 err:
104 if (!ret)
105 ERR_print_errors_fp(stderr);
106
107 EVP_CIPHER_free(cipher);
108 EVP_CIPHER_CTX_free(ctx);
109
110 return ret;
111 }
112
aria_cbc_decrypt(void)113 int aria_cbc_decrypt(void)
114 {
115 int ret = 0;
116 EVP_CIPHER_CTX *ctx;
117 EVP_CIPHER *cipher = NULL;
118 int outlen, tmplen, rv;
119 size_t cbc_ivlen = sizeof(cbc_iv);
120 unsigned char outbuf[1024];
121
122 printf("ARIA CBC Decrypt:\n");
123 printf("Ciphertext:\n");
124 BIO_dump_fp(stdout, cbc_ct, sizeof(cbc_ct));
125
126 if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
127 goto err;
128
129 /* Fetch the cipher implementation */
130 if ((cipher = EVP_CIPHER_fetch(libctx, "ARIA-256-CBC", propq)) == NULL)
131 goto err;
132
133 /*
134 * Initialise an encrypt operation with the cipher/mode, key and IV.
135 * We are not setting any custom params so let params be just NULL.
136 */
137 if (!EVP_DecryptInit_ex2(ctx, cipher, cbc_key, cbc_iv, /* params */ NULL))
138 goto err;
139
140 /* Decrypt plaintext */
141 if (!EVP_DecryptUpdate(ctx, outbuf, &outlen, cbc_ct, sizeof(cbc_ct)))
142 goto err;
143
144 /* Finalise: there can be some additional output from padding */
145 if (!EVP_DecryptFinal_ex(ctx, outbuf + outlen, &tmplen))
146 goto err;
147 outlen += tmplen;
148
149 /* Output decrypted block */
150 printf("Plaintext (outlen:%d):\n", outlen);
151 BIO_dump_fp(stdout, outbuf, outlen);
152
153 if (sizeof(cbc_pt) == outlen && !CRYPTO_memcmp(outbuf, cbc_pt, outlen))
154 printf("Final plaintext matches original plaintext\n");
155 else
156 printf("Final plaintext differs from original plaintext\n");
157
158 ret = 1;
159 err:
160 if (!ret)
161 ERR_print_errors_fp(stderr);
162
163 EVP_CIPHER_free(cipher);
164 EVP_CIPHER_CTX_free(ctx);
165
166 return ret;
167 }
168
main(int argc,char ** argv)169 int main(int argc, char **argv)
170 {
171 if (!aria_cbc_encrypt())
172 return 1;
173
174 if (!aria_cbc_decrypt())
175 return 1;
176
177 return 0;
178 }
179
