[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 |
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| 13 | #ifndef OPENSSL_NO_RC5
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| 14 |
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| 15 | # include <openssl/evp.h>
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| 16 | # include <internal/evp_int.h>
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| 17 | # include <openssl/objects.h>
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| 18 | # include "evp_locl.h"
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| 19 | # include <openssl/rc5.h>
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| 20 |
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| 21 | static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 22 | const unsigned char *iv, int enc);
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| 23 | static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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| 24 |
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| 25 | typedef struct {
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| 26 | int rounds; /* number of rounds */
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| 27 | RC5_32_KEY ks; /* key schedule */
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| 28 | } EVP_RC5_KEY;
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| 29 |
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| 30 | # define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx)
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| 31 |
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| 32 | IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5,
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| 33 | 8, RC5_32_KEY_LENGTH, 8, 64,
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| 34 | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
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| 35 | r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl)
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| 36 |
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| 37 | static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
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| 38 | {
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| 39 | switch (type) {
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| 40 | case EVP_CTRL_INIT:
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| 41 | data(c)->rounds = RC5_12_ROUNDS;
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| 42 | return 1;
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| 43 |
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| 44 | case EVP_CTRL_GET_RC5_ROUNDS:
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| 45 | *(int *)ptr = data(c)->rounds;
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| 46 | return 1;
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| 47 |
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| 48 | case EVP_CTRL_SET_RC5_ROUNDS:
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| 49 | switch (arg) {
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| 50 | case RC5_8_ROUNDS:
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| 51 | case RC5_12_ROUNDS:
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| 52 | case RC5_16_ROUNDS:
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| 53 | data(c)->rounds = arg;
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| 54 | return 1;
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| 55 |
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| 56 | default:
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| 57 | EVPerr(EVP_F_RC5_CTRL, EVP_R_UNSUPPORTED_NUMBER_OF_ROUNDS);
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| 58 | return 0;
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| 59 | }
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| 60 |
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| 61 | default:
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| 62 | return -1;
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| 63 | }
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| 64 | }
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| 65 |
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| 66 | static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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| 67 | const unsigned char *iv, int enc)
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| 68 | {
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| 69 | RC5_32_set_key(&data(ctx)->ks, EVP_CIPHER_CTX_key_length(ctx),
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| 70 | key, data(ctx)->rounds);
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| 71 | return 1;
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| 72 | }
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| 73 |
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| 74 | #endif
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