/* * Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ /* Dispatch functions for RC5 cipher modes ecb, cbc, ofb, cfb */ /* * RC5 low level APIs are deprecated for public use, but still ok for internal * use. */ #include "internal/deprecated.h" #include #include "cipher_rc5.h" #include "prov/implementations.h" #include "prov/providercommon.h" #define RC5_FLAGS PROV_CIPHER_FLAG_VARIABLE_LENGTH static OSSL_FUNC_cipher_encrypt_init_fn rc5_einit; static OSSL_FUNC_cipher_decrypt_init_fn rc5_dinit; static OSSL_FUNC_cipher_freectx_fn rc5_freectx; static OSSL_FUNC_cipher_dupctx_fn rc5_dupctx; OSSL_FUNC_cipher_gettable_ctx_params_fn rc5_gettable_ctx_params; OSSL_FUNC_cipher_settable_ctx_params_fn rc5_settable_ctx_params; static OSSL_FUNC_cipher_set_ctx_params_fn rc5_set_ctx_params; static void rc5_freectx(void *vctx) { PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx; ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx); OPENSSL_clear_free(ctx, sizeof(*ctx)); } static void *rc5_dupctx(void *ctx) { PROV_RC5_CTX *in = (PROV_RC5_CTX *)ctx; PROV_RC5_CTX *ret; if (!ossl_prov_is_running()) return NULL; ret = OPENSSL_malloc(sizeof(*ret)); if (ret == NULL) return NULL; *ret = *in; return ret; } static int rc5_einit(void *ctx, const unsigned char *key, size_t keylen, const unsigned char *iv, size_t ivlen, const OSSL_PARAM params[]) { if (!ossl_cipher_generic_einit(ctx, key, keylen, iv, ivlen, NULL)) return 0; return rc5_set_ctx_params(ctx, params); } static int rc5_dinit(void *ctx, const unsigned char *key, size_t keylen, const unsigned char *iv, size_t ivlen, const OSSL_PARAM params[]) { if (!ossl_cipher_generic_dinit(ctx, key, keylen, iv, ivlen, NULL)) return 0; return rc5_set_ctx_params(ctx, params); } static int rc5_set_ctx_params(void *vctx, const OSSL_PARAM params[]) { PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx; const OSSL_PARAM *p; if (ossl_param_is_empty(params)) return 1; if (!ossl_cipher_var_keylen_set_ctx_params(vctx, params)) return 0; p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_ROUNDS); if (p != NULL) { unsigned int rounds; if (!OSSL_PARAM_get_uint(p, &rounds)) { ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER); return 0; } if (rounds != RC5_8_ROUNDS && rounds != RC5_12_ROUNDS && rounds != RC5_16_ROUNDS) { ERR_raise(ERR_LIB_PROV, PROV_R_UNSUPPORTED_NUMBER_OF_ROUNDS); return 0; } ctx->rounds = rounds; } return 1; } CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(rc5) OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL), CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(rc5) CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_START(rc5) OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL), OSSL_PARAM_uint(OSSL_CIPHER_PARAM_ROUNDS, NULL), CIPHER_DEFAULT_SETTABLE_CTX_PARAMS_END(rc5) static int rc5_get_ctx_params(void *vctx, OSSL_PARAM params[]) { PROV_RC5_CTX *ctx = (PROV_RC5_CTX *)vctx; OSSL_PARAM *p; if (!ossl_cipher_generic_get_ctx_params(vctx, params)) return 0; p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_ROUNDS); if (p != NULL && !OSSL_PARAM_set_uint(p, ctx->rounds)) { ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER); return 0; } return 1; } #define IMPLEMENT_cipher(alg, UCALG, lcmode, UCMODE, flags, kbits, \ blkbits, ivbits, typ) \ static OSSL_FUNC_cipher_get_params_fn alg##_##kbits##_##lcmode##_get_params; \ static int alg##_##kbits##_##lcmode##_get_params(OSSL_PARAM params[]) \ { \ return ossl_cipher_generic_get_params(params, EVP_CIPH_##UCMODE##_MODE, \ flags, kbits, blkbits, ivbits); \ } \ static OSSL_FUNC_cipher_newctx_fn alg##_##kbits##_##lcmode##_newctx; \ static void *alg##_##kbits##_##lcmode##_newctx(void *provctx) \ { \ PROV_##UCALG##_CTX *ctx; \ if (!ossl_prov_is_running()) \ return NULL; \ ctx = OPENSSL_zalloc(sizeof(*ctx)); \ if (ctx != NULL) { \ ossl_cipher_generic_initkey(ctx, kbits, blkbits, ivbits, \ EVP_CIPH_##UCMODE##_MODE, flags, \ ossl_prov_cipher_hw_##alg##_##lcmode(kbits),\ NULL); \ ctx->rounds = RC5_12_ROUNDS; \ } \ return ctx; \ } \ const OSSL_DISPATCH ossl_##alg##kbits##lcmode##_functions[] = { \ { OSSL_FUNC_CIPHER_NEWCTX, \ (void (*)(void)) alg##_##kbits##_##lcmode##_newctx }, \ { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) alg##_freectx }, \ { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) alg##_dupctx }, \ { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc5_einit }, \ { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc5_dinit }, \ { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))ossl_cipher_generic_##typ##_update },\ { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))ossl_cipher_generic_##typ##_final }, \ { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))ossl_cipher_generic_cipher }, \ { OSSL_FUNC_CIPHER_GET_PARAMS, \ (void (*)(void)) alg##_##kbits##_##lcmode##_get_params }, \ { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \ (void (*)(void))ossl_cipher_generic_gettable_params }, \ { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \ (void (*)(void))rc5_get_ctx_params }, \ { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \ (void (*)(void))rc5_gettable_ctx_params }, \ { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \ (void (*)(void))rc5_set_ctx_params }, \ { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \ (void (*)(void))rc5_settable_ctx_params }, \ OSSL_DISPATCH_END \ }; /* ossl_rc5128ecb_functions */ IMPLEMENT_cipher(rc5, RC5, ecb, ECB, RC5_FLAGS, 128, 64, 0, block) /* ossl_rc5128cbc_functions */ IMPLEMENT_cipher(rc5, RC5, cbc, CBC, RC5_FLAGS, 128, 64, 64, block) /* ossl_rc5128ofb64_functions */ IMPLEMENT_cipher(rc5, RC5, ofb64, OFB, RC5_FLAGS, 128, 8, 64, stream) /* ossl_rc5128cfb64_functions */ IMPLEMENT_cipher(rc5, RC5, cfb64, CFB, RC5_FLAGS, 128, 8, 64, stream)