1/* 2 * Copyright 2018-2022 The OpenSSL Project Authors. All Rights Reserved. 3 * Copyright (c) 2018-2019, Oracle and/or its affiliates. All rights reserved. 4 * 5 * Licensed under the Apache License 2.0 (the "License"). You may not use 6 * this file except in compliance with the License. You can obtain a copy 7 * in the file LICENSE in the source distribution or at 8 * https://www.openssl.org/source/license.html 9 */ 10 11#include <stdio.h> 12#include <stdlib.h> 13#include "internal/cryptlib.h" 14#include <openssl/evp.h> 15#include <openssl/kdf.h> 16#include <openssl/core.h> 17#include <openssl/core_names.h> 18#include "crypto/evp.h" 19#include "internal/numbers.h" 20#include "internal/provider.h" 21#include "evp_local.h" 22 23EVP_KDF_CTX *EVP_KDF_CTX_new(EVP_KDF *kdf) 24{ 25 EVP_KDF_CTX *ctx = NULL; 26 27 if (kdf == NULL) 28 return NULL; 29 30 ctx = OPENSSL_zalloc(sizeof(EVP_KDF_CTX)); 31 if (ctx == NULL 32 || (ctx->algctx = kdf->newctx(ossl_provider_ctx(kdf->prov))) == NULL 33 || !EVP_KDF_up_ref(kdf)) { 34 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); 35 if (ctx != NULL) 36 kdf->freectx(ctx->algctx); 37 OPENSSL_free(ctx); 38 ctx = NULL; 39 } else { 40 ctx->meth = kdf; 41 } 42 return ctx; 43} 44 45void EVP_KDF_CTX_free(EVP_KDF_CTX *ctx) 46{ 47 if (ctx == NULL) 48 return; 49 ctx->meth->freectx(ctx->algctx); 50 ctx->algctx = NULL; 51 EVP_KDF_free(ctx->meth); 52 OPENSSL_free(ctx); 53} 54 55EVP_KDF_CTX *EVP_KDF_CTX_dup(const EVP_KDF_CTX *src) 56{ 57 EVP_KDF_CTX *dst; 58 59 if (src == NULL || src->algctx == NULL || src->meth->dupctx == NULL) 60 return NULL; 61 62 dst = OPENSSL_malloc(sizeof(*dst)); 63 if (dst == NULL) { 64 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); 65 return NULL; 66 } 67 68 memcpy(dst, src, sizeof(*dst)); 69 if (!EVP_KDF_up_ref(dst->meth)) { 70 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); 71 OPENSSL_free(dst); 72 return NULL; 73 } 74 75 dst->algctx = src->meth->dupctx(src->algctx); 76 if (dst->algctx == NULL) { 77 EVP_KDF_CTX_free(dst); 78 return NULL; 79 } 80 return dst; 81} 82 83int evp_kdf_get_number(const EVP_KDF *kdf) 84{ 85 return kdf->name_id; 86} 87 88const char *EVP_KDF_get0_name(const EVP_KDF *kdf) 89{ 90 return kdf->type_name; 91} 92 93const char *EVP_KDF_get0_description(const EVP_KDF *kdf) 94{ 95 return kdf->description; 96} 97 98int EVP_KDF_is_a(const EVP_KDF *kdf, const char *name) 99{ 100 return kdf != NULL && evp_is_a(kdf->prov, kdf->name_id, NULL, name); 101} 102 103const OSSL_PROVIDER *EVP_KDF_get0_provider(const EVP_KDF *kdf) 104{ 105 return kdf->prov; 106} 107 108const EVP_KDF *EVP_KDF_CTX_kdf(EVP_KDF_CTX *ctx) 109{ 110 return ctx->meth; 111} 112 113void EVP_KDF_CTX_reset(EVP_KDF_CTX *ctx) 114{ 115 if (ctx == NULL) 116 return; 117 118 if (ctx->meth->reset != NULL) 119 ctx->meth->reset(ctx->algctx); 120} 121 122size_t EVP_KDF_CTX_get_kdf_size(EVP_KDF_CTX *ctx) 123{ 124 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; 125 size_t s = 0; 126 127 if (ctx == NULL) 128 return 0; 129 130 *params = OSSL_PARAM_construct_size_t(OSSL_KDF_PARAM_SIZE, &s); 131 if (ctx->meth->get_ctx_params != NULL 132 && ctx->meth->get_ctx_params(ctx->algctx, params)) 133 return s; 134 if (ctx->meth->get_params != NULL 135 && ctx->meth->get_params(params)) 136 return s; 137 return 0; 138} 139 140int EVP_KDF_derive(EVP_KDF_CTX *ctx, unsigned char *key, size_t keylen, 141 const OSSL_PARAM params[]) 142{ 143 if (ctx == NULL) 144 return 0; 145 146 return ctx->meth->derive(ctx->algctx, key, keylen, params); 147} 148 149/* 150 * The {get,set}_params functions return 1 if there is no corresponding 151 * function in the implementation. This is the same as if there was one, 152 * but it didn't recognise any of the given params, i.e. nothing in the 153 * bag of parameters was useful. 154 */ 155int EVP_KDF_get_params(EVP_KDF *kdf, OSSL_PARAM params[]) 156{ 157 if (kdf->get_params != NULL) 158 return kdf->get_params(params); 159 return 1; 160} 161 162int EVP_KDF_CTX_get_params(EVP_KDF_CTX *ctx, OSSL_PARAM params[]) 163{ 164 if (ctx->meth->get_ctx_params != NULL) 165 return ctx->meth->get_ctx_params(ctx->algctx, params); 166 return 1; 167} 168 169int EVP_KDF_CTX_set_params(EVP_KDF_CTX *ctx, const OSSL_PARAM params[]) 170{ 171 if (ctx->meth->set_ctx_params != NULL) 172 return ctx->meth->set_ctx_params(ctx->algctx, params); 173 return 1; 174} 175 176int EVP_KDF_names_do_all(const EVP_KDF *kdf, 177 void (*fn)(const char *name, void *data), 178 void *data) 179{ 180 if (kdf->prov != NULL) 181 return evp_names_do_all(kdf->prov, kdf->name_id, fn, data); 182 183 return 1; 184} 185