mirror of
https://github.com/openssl/openssl.git
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fe41253823
Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/16962)
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* RC5 low level APIs are deprecated for public use, but still ok for internal
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* use.
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*/
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#include "internal/deprecated.h"
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#ifndef OPENSSL_NO_RC5
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# include <openssl/evp.h>
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# include "crypto/evp.h"
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# include <openssl/objects.h>
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# include "evp_local.h"
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# include <openssl/rc5.h>
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static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
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typedef struct {
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int rounds; /* number of rounds */
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RC5_32_KEY ks; /* key schedule */
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} EVP_RC5_KEY;
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# define data(ctx) EVP_C_DATA(EVP_RC5_KEY,ctx)
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IMPLEMENT_BLOCK_CIPHER(rc5_32_12_16, ks, RC5_32, EVP_RC5_KEY, NID_rc5,
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8, RC5_32_KEY_LENGTH, 8, 64,
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EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT,
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r_32_12_16_init_key, NULL, NULL, NULL, rc5_ctrl)
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static int rc5_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
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{
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switch (type) {
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case EVP_CTRL_INIT:
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data(c)->rounds = RC5_12_ROUNDS;
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return 1;
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case EVP_CTRL_GET_RC5_ROUNDS:
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*(int *)ptr = data(c)->rounds;
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return 1;
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case EVP_CTRL_SET_RC5_ROUNDS:
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switch (arg) {
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case RC5_8_ROUNDS:
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case RC5_12_ROUNDS:
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case RC5_16_ROUNDS:
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data(c)->rounds = arg;
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return 1;
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default:
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ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_NUMBER_OF_ROUNDS);
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return 0;
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}
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default:
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return -1;
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}
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}
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static int r_32_12_16_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{
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const int key_len = EVP_CIPHER_CTX_get_key_length(ctx);
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if (key_len > 255 || key_len < 0) {
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ERR_raise(ERR_LIB_EVP, EVP_R_BAD_KEY_LENGTH);
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return 0;
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}
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return RC5_32_set_key(&data(ctx)->ks, key_len, key, data(ctx)->rounds);
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}
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#endif
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