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 * RC5 low level APIs are deprecated for public use, but still ok for internal 12 * use. 13 */ 14#include "internal/deprecated.h" 15 16#include <stdio.h> 17#include "internal/cryptlib.h" 18 19#ifndef OPENSSL_NO_RC5 20 21# include <openssl/evp.h> 22# include "crypto/evp.h" 23# include <openssl/objects.h> 24# include "evp_local.h" 25# include <openssl/rc5.h> 26 27static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 28 const unsigned char *iv, int enc); 29static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 30 31typedef struct { 32 int rounds; /* number of rounds */ 33 RC5_32_KEY ks; /* key schedule */ 34} EVP_RC5_KEY; 35 36# define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx) 37 38IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5, 39 8, RC5_32_KEY_LENGTH, 8, 64, 40 EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 41 r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl) 42 43static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 44{ 45 switch (type) { 46 case EVP_CTRL_INIT: 47 data(c)->rounds = RC5_12_ROUNDS; 48 return 1; 49 50 case EVP_CTRL_GET_RC5_ROUNDS: 51 *(int *)ptr = data(c)->rounds; 52 return 1; 53 54 case EVP_CTRL_SET_RC5_ROUNDS: 55 switch (arg) { 56 case RC5_8_ROUNDS: 57 case RC5_12_ROUNDS: 58 case RC5_16_ROUNDS: 59 data(c)->rounds = arg; 60 return 1; 61 62 default: 63 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_NUMBER_OF_ROUNDS); 64 return 0; 65 } 66 67 default: 68 return -1; 69 } 70} 71 72static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 73 const unsigned char *iv, int enc) 74{ 75 const int key_len = EVP_CIPHER_CTX_get_key_length(ctx); 76 77 if (key_len > 255 || key_len < 0) { 78 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_KEY_LENGTH); 79 return 0; 80 } 81 return RC5_32_set_key(&data(ctx)->ks, key_len, key, data(ctx)->rounds); 82} 83 84#endif 85