1 /* 2 * Copyright 1995-2021 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 * IDEA low level APIs are deprecated for public use, but still ok for internal 12 * use where we're using them to implement the higher level EVP interface, as is 13 * the case here. 14 */ 15 #include "internal/deprecated.h" 16 17 #include <stdio.h> 18 #include "internal/cryptlib.h" 19 20 #ifndef OPENSSL_NO_IDEA 21 # include <openssl/evp.h> 22 # include <openssl/objects.h> 23 # include "crypto/evp.h" 24 # include <openssl/idea.h> 25 # include "evp_local.h" 26 27 /* Can't use IMPLEMENT_BLOCK_CIPHER because IDEA_ecb_encrypt is different */ 28 29 typedef struct { 30 IDEA_KEY_SCHEDULE ks; 31 } EVP_IDEA_KEY; 32 33 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 34 const unsigned char *iv, int enc); 35 36 /* 37 * NB IDEA_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a 38 * special case 39 */ 40 41 static int idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, 42 const unsigned char *in, size_t inl) 43 { 44 BLOCK_CIPHER_ecb_loop() 45 IDEA_ecb_encrypt(in + i, out + i, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks); 46 return 1; 47 } 48 49 BLOCK_CIPHER_func_cbc(idea, IDEA, EVP_IDEA_KEY, ks) 50 BLOCK_CIPHER_func_ofb(idea, IDEA, 64, EVP_IDEA_KEY, ks) 51 BLOCK_CIPHER_func_cfb(idea, IDEA, 64, EVP_IDEA_KEY, ks) 52 53 BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64, 54 0, idea_init_key, NULL, 55 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL) 56 57 static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 58 const unsigned char *iv, int enc) 59 { 60 if (!enc) { 61 if (EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_OFB_MODE) 62 enc = 1; 63 else if (EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_CFB_MODE) 64 enc = 1; 65 } 66 if (enc) 67 IDEA_set_encrypt_key(key, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks); 68 else { 69 IDEA_KEY_SCHEDULE tmp; 70 71 IDEA_set_encrypt_key(key, &tmp); 72 IDEA_set_decrypt_key(&tmp, &EVP_C_DATA(EVP_IDEA_KEY,ctx)->ks); 73 OPENSSL_cleanse((unsigned char *)&tmp, sizeof(IDEA_KEY_SCHEDULE)); 74 } 75 return 1; 76 } 77 78 #endif 79