demos/cipher/ariacbc.c

   1 /*
   2  * Copyright 2012-2023 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
  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
 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
 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 }