1 /* 2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (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 #include <stdio.h> 11 #include "internal/cryptlib.h" 12 13 #ifndef OPENSSL_NO_IDEA 14 # include <openssl/evp.h> 15 # include <openssl/objects.h> 16 # include "internal/evp_int.h" 17 # include <openssl/idea.h> 18 19 /* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */ 20 21 typedef struct { 22 IDEA_KEY_SCHEDULE ks; 23 } EVP_IDEA_KEY; 24 25 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 26 const unsigned char *iv, int enc); 27 28 /* 29 * NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a 30 * special case 31 */ 32 33 static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 34 const unsigned char *in, size_t inl) 35 { 36 BLOCK_CIPHER_ecb_loop() 37 IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks); 38 return 1; 39 } 40 41 BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks) 42 BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks) 43 BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks) 44 45 BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64, 46 0, idea_init_key, NULL, 47 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL) 48 49 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 50 const unsigned char *iv, int enc) 51 { 52 if (!enc) { 53 if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) 54 enc = 1; 55 else if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE) 56 enc = 1; 57 } 58 if (enc) 59 IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks); 60 else { 61 IDEA_KEY_SCHEDULE tmp; 62 63 IDEA_set_encrypt_key(key, &tmp); 64 IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks); 65 OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE)); 66 } 67 return 1; 68 } 69 70 #endif 71