1 /* 2 * Copyright 1995-2019 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_RC5 14 15 # include <openssl/evp.h> 16 # include "crypto/evp.h" 17 # include <openssl/objects.h> 18 # include "evp_local.h" 19 # include <openssl/rc5.h> 20 21 static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 22 const unsigned char *iv, int enc); 23 static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 24 25 typedef struct { 26 int rounds; /* number of rounds */ 27 RC5_32_KEY ks; /* key schedule */ 28 } EVP_RC5_KEY; 29 30 # define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx) 31 32 IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5, 33 8, RC5_32_KEY_LENGTH, 8, 64, 34 EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 35 r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl) 36 37 static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 38 { 39 switch (type) { 40 case EVP_CTRL_INIT: 41 data(c)->rounds = RC5_12_ROUNDS; 42 return 1; 43 44 case EVP_CTRL_GET_RC5_ROUNDS: 45 *(int *)ptr = data(c)->rounds; 46 return 1; 47 48 case EVP_CTRL_SET_RC5_ROUNDS: 49 switch (arg) { 50 case RC5_8_ROUNDS: 51 case RC5_12_ROUNDS: 52 case RC5_16_ROUNDS: 53 data(c)->rounds = arg; 54 return 1; 55 56 default: 57 EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPPORTED_NUMBER_OF_ROUNDS); 58 return 0; 59 } 60 61 default: 62 return -1; 63 } 64 } 65 66 static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 67 const unsigned char *iv, int enc) 68 { 69 if (EVP_CIPHER_CTX_key_length(ctx) > 255) { 70 EVPerr(EVP_F_R_32_12_16_INIT_KEY, EVP_R_BAD_KEY_LENGTH); 71 return 0; 72 } 73 RC5_32_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx), 74 key, data(ctx)->rounds); 75 return 1; 76 } 77 78 #endif 79