2 * Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
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
10 /* Dispatch functions for RC4 ciphers */
13 * RC4 low level APIs are deprecated for public use, but still ok for internal
16 #include "internal/deprecated.h"
18 #include "cipher_rc4.h"
19 #include "prov/implementations.h"
21 /* TODO (3.0) Figure out what flags are required */
22 #define RC4_FLAGS EVP_CIPH_FLAG_DEFAULT_ASN1
24 static OSSL_FUNC_cipher_freectx_fn rc4_freectx;
25 static OSSL_FUNC_cipher_dupctx_fn rc4_dupctx;
27 static void rc4_freectx(void *vctx)
29 PROV_RC4_CTX *ctx = (PROV_RC4_CTX *)vctx;
31 cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
32 OPENSSL_clear_free(ctx, sizeof(*ctx));
35 static void *rc4_dupctx(void *ctx)
37 PROV_RC4_CTX *in = (PROV_RC4_CTX *)ctx;
38 PROV_RC4_CTX *ret = OPENSSL_malloc(sizeof(*ret));
41 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
49 #define IMPLEMENT_cipher(alg, UCALG, flags, kbits, blkbits, ivbits, typ) \
50 static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_get_params; \
51 static int alg##_##kbits##_get_params(OSSL_PARAM params[]) \
53 return cipher_generic_get_params(params, 0, flags, \
54 kbits, blkbits, ivbits); \
56 static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_newctx; \
57 static void * alg##_##kbits##_newctx(void *provctx) \
59 PROV_##UCALG##_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); \
61 cipher_generic_initkey(ctx, kbits, blkbits, ivbits, 0, flags, \
62 PROV_CIPHER_HW_##alg(kbits), NULL); \
66 const OSSL_DISPATCH alg##kbits##_functions[] = { \
67 { OSSL_FUNC_CIPHER_NEWCTX, \
68 (void (*)(void)) alg##_##kbits##_newctx }, \
69 { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
70 { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
71 { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))cipher_generic_einit }, \
72 { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))cipher_generic_dinit }, \
73 { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))cipher_generic_##typ##_update },\
74 { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))cipher_generic_##typ##_final }, \
75 { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))cipher_generic_cipher }, \
76 { OSSL_FUNC_CIPHER_GET_PARAMS, \
77 (void (*)(void)) alg##_##kbits##_get_params }, \
78 { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
79 (void (*)(void))cipher_generic_get_ctx_params }, \
80 { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
81 (void (*)(void))cipher_var_keylen_set_ctx_params }, \
82 { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
83 (void (*)(void))cipher_generic_gettable_params }, \
84 { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
85 (void (*)(void))cipher_generic_gettable_ctx_params }, \
86 { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
87 (void (*)(void))cipher_var_keylen_settable_ctx_params }, \
92 IMPLEMENT_cipher(rc4, RC4, EVP_CIPH_VARIABLE_LENGTH, 40, 8, 0, stream)
93 /* rc4128_functions */
94 IMPLEMENT_cipher(rc4, RC4, EVP_CIPH_VARIABLE_LENGTH, 128, 8, 0, stream)