mirror of https://github.com/openssl/openssl
120 lines
5.5 KiB
C
120 lines
5.5 KiB
C
/*
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* Copyright 2019-2023 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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/* Dispatch functions for RC4 ciphers */
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/*
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* RC4 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 "cipher_rc4.h"
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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#define RC4_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH
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static OSSL_FUNC_cipher_encrypt_init_fn rc4_einit;
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static OSSL_FUNC_cipher_decrypt_init_fn rc4_dinit;
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static OSSL_FUNC_cipher_freectx_fn rc4_freectx;
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static OSSL_FUNC_cipher_dupctx_fn rc4_dupctx;
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static void rc4_freectx(void *vctx)
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{
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PROV_RC4_CTX *ctx = (PROV_RC4_CTX *)vctx;
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ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
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OPENSSL_clear_free(ctx, sizeof(*ctx));
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}
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static void *rc4_dupctx(void *ctx)
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{
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PROV_RC4_CTX *in = (PROV_RC4_CTX *)ctx;
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PROV_RC4_CTX *ret;
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if (!ossl_prov_is_running())
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return NULL;
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ret = OPENSSL_malloc(sizeof(*ret));
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if (ret == NULL)
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return NULL;
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*ret = *in;
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return ret;
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}
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static int rc4_einit(void *ctx, const unsigned char *key, size_t keylen,
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const unsigned char *iv, size_t ivlen,
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const OSSL_PARAM params[])
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{
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if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL))
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return 0;
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return ossl_cipher_var_keylen_set_ctx_params(ctx, params);
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}
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static int rc4_dinit(void *ctx, const unsigned char *key, size_t keylen,
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const unsigned char *iv, size_t ivlen,
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const OSSL_PARAM params[])
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{
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if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL))
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return 0;
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return ossl_cipher_var_keylen_set_ctx_params(ctx, params);
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}
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#define IMPLEMENT_cipher(alg, UCALG, flags, kbits, blkbits, ivbits, typ) \
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static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_get_params; \
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static int alg##_##kbits##_get_params(OSSL_PARAM params[]) \
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{ \
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return ossl_cipher_generic_get_params(params, 0, flags, \
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kbits, blkbits, ivbits); \
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} \
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static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_newctx; \
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static void *alg##_##kbits##_newctx(void *provctx) \
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{ \
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PROV_##UCALG##_CTX *ctx; \
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if (!ossl_prov_is_running()) \
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return NULL; \
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ctx = OPENSSL_zalloc(sizeof(*ctx)); \
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if (ctx != NULL) { \
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ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, 0, flags, \
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ossl_prov_cipher_hw_##alg(kbits), NULL); \
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} \
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return ctx; \
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} \
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const OSSL_DISPATCH ossl_##alg##kbits##_functions[] = { \
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{ OSSL_FUNC_CIPHER_NEWCTX, \
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(void (*)(void)) alg##_##kbits##_newctx }, \
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{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \
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{ OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \
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{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc4_einit }, \
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{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc4_dinit }, \
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{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\
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{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \
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{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \
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{ OSSL_FUNC_CIPHER_GET_PARAMS, \
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(void (*)(void)) alg##_##kbits##_get_params }, \
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{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
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(void (*)(void))ossl_cipher_generic_get_ctx_params }, \
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{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
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(void (*)(void))ossl_cipher_var_keylen_set_ctx_params }, \
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{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
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(void (*)(void))ossl_cipher_generic_gettable_params }, \
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{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
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(void (*)(void))ossl_cipher_generic_gettable_ctx_params }, \
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{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
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(void (*)(void))ossl_cipher_var_keylen_settable_ctx_params }, \
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OSSL_DISPATCH_END \
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};
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/* ossl_rc440_functions */
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IMPLEMENT_cipher(rc4, RC4, RC4_FLAGS, 40, 8, 0, stream)
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/* ossl_rc4128_functions */
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IMPLEMENT_cipher(rc4, RC4, RC4_FLAGS, 128, 8, 0, stream)
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