1/*
2 * Copyright 2019 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/* Dispatch functions for RC4 ciphers */
11
12#include "cipher_rc4.h"
13#include "prov/implementations.h"
14
15/* TODO (3.0) Figure out what flags are required */
16#define RC4_FLAGS EVP_CIPH_FLAG_DEFAULT_ASN1
17
18static OSSL_OP_cipher_freectx_fn rc4_freectx;
19static OSSL_OP_cipher_dupctx_fn rc4_dupctx;
20
21static void rc4_freectx(void *vctx)
22{
23 PROV_RC4_CTX *ctx = (PROV_RC4_CTX *)vctx;
24
25 OPENSSL_clear_free(ctx, sizeof(*ctx));
26}
27
28static void *rc4_dupctx(void *ctx)
29{
30 PROV_RC4_CTX *in = (PROV_RC4_CTX *)ctx;
31 PROV_RC4_CTX *ret = OPENSSL_malloc(sizeof(*ret));
32
33 if (ret == NULL) {
34 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
35 return NULL;
36 }
37 *ret = *in;
38
39 return ret;
40}
41
42#define IMPLEMENT_cipher(alg, UCALG, flags, kbits, blkbits, ivbits, typ) \
43static OSSL_OP_cipher_get_params_fn alg##_##kbits##_get_params; \
44static int alg##_##kbits##_get_params(OSSL_PARAM params[]) \
45{ \
46 return cipher_generic_get_params(params, 0, flags, \
47 kbits, blkbits, ivbits); \
48} \
49static OSSL_OP_cipher_newctx_fn alg##_##kbits##_newctx; \
50static void * alg##_##kbits##_newctx(void *provctx) \
51{ \
52 PROV_##UCALG##_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); \
53 if (ctx != NULL) { \
54 cipher_generic_initkey(ctx, kbits, blkbits, ivbits, 0, flags, \
55 PROV_CIPHER_HW_##alg(kbits), NULL); \
56 } \
57 return ctx; \
58} \
59const OSSL_DISPATCH alg##kbits##_functions[] = { \
60 { OSSL_FUNC_CIPHER_NEWCTX, \
61 (void (*)(void)) alg##_##kbits##_newctx }, \
62 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
63 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
64 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit }, \
65 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit }, \
66 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\
67 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final }, \
68 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \
69 { OSSL_FUNC_CIPHER_GET_PARAMS, \
70 (void (*)(void)) alg##_##kbits##_get_params }, \
71 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
72 (void (*)(void))cipher_generic_get_ctx_params }, \
73 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
74 (void (*)(void))cipher_var_keylen_set_ctx_params }, \
75 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
76 (void (*)(void))cipher_generic_gettable_params }, \
77 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
78 (void (*)(void))cipher_generic_gettable_ctx_params }, \
79 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
80 (void (*)(void))cipher_var_keylen_settable_ctx_params }, \
81 { 0, NULL } \
82};
83
84/* rc440_functions */
85IMPLEMENT_cipher(rc4, RC4, EVP_CIPH_VARIABLE_LENGTH, 40, 8, 0, stream)
86/* rc4128_functions */
87IMPLEMENT_cipher(rc4, RC4, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 0, stream)
88