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 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 } 176