diff options
Diffstat (limited to 'crypto/evp/kdf_lib.c')
| -rw-r--r-- | crypto/evp/kdf_lib.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/crypto/evp/kdf_lib.c b/crypto/evp/kdf_lib.c new file mode 100644 index 000000000000..6a6bb31e6372 --- /dev/null +++ b/crypto/evp/kdf_lib.c @@ -0,0 +1,184 @@ +/* + * Copyright 2018-2022 The OpenSSL Project Authors. All Rights Reserved. + * Copyright (c) 2018-2019, Oracle and/or its affiliates. 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 + */ + +#include <stdio.h> +#include <stdlib.h> +#include "internal/cryptlib.h" +#include <openssl/evp.h> +#include <openssl/kdf.h> +#include <openssl/core.h> +#include <openssl/core_names.h> +#include "crypto/evp.h" +#include "internal/numbers.h" +#include "internal/provider.h" +#include "evp_local.h" + +EVP_KDF_CTX *EVP_KDF_CTX_new(EVP_KDF *kdf) +{ + EVP_KDF_CTX *ctx = NULL; + + if (kdf == NULL) + return NULL; + + ctx = OPENSSL_zalloc(sizeof(EVP_KDF_CTX)); + if (ctx == NULL + || (ctx->algctx = kdf->newctx(ossl_provider_ctx(kdf->prov))) == NULL + || !EVP_KDF_up_ref(kdf)) { + ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); + if (ctx != NULL) + kdf->freectx(ctx->algctx); + OPENSSL_free(ctx); + ctx = NULL; + } else { + ctx->meth = kdf; + } + return ctx; +} + +void EVP_KDF_CTX_free(EVP_KDF_CTX *ctx) +{ + if (ctx == NULL) + return; + ctx->meth->freectx(ctx->algctx); + ctx->algctx = NULL; + EVP_KDF_free(ctx->meth); + OPENSSL_free(ctx); +} + +EVP_KDF_CTX *EVP_KDF_CTX_dup(const EVP_KDF_CTX *src) +{ + EVP_KDF_CTX *dst; + + if (src == NULL || src->algctx == NULL || src->meth->dupctx == NULL) + return NULL; + + dst = OPENSSL_malloc(sizeof(*dst)); + if (dst == NULL) { + ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); + return NULL; + } + + memcpy(dst, src, sizeof(*dst)); + if (!EVP_KDF_up_ref(dst->meth)) { + ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); + OPENSSL_free(dst); + return NULL; + } + + dst->algctx = src->meth->dupctx(src->algctx); + if (dst->algctx == NULL) { + EVP_KDF_CTX_free(dst); + return NULL; + } + return dst; +} + +int evp_kdf_get_number(const EVP_KDF *kdf) +{ + return kdf->name_id; +} + +const char *EVP_KDF_get0_name(const EVP_KDF *kdf) +{ + return kdf->type_name; +} + +const char *EVP_KDF_get0_description(const EVP_KDF *kdf) +{ + return kdf->description; +} + +int EVP_KDF_is_a(const EVP_KDF *kdf, const char *name) +{ + return kdf != NULL && evp_is_a(kdf->prov, kdf->name_id, NULL, name); +} + +const OSSL_PROVIDER *EVP_KDF_get0_provider(const EVP_KDF *kdf) +{ + return kdf->prov; +} + +const EVP_KDF *EVP_KDF_CTX_kdf(EVP_KDF_CTX *ctx) +{ + return ctx->meth; +} + +void EVP_KDF_CTX_reset(EVP_KDF_CTX *ctx) +{ + if (ctx == NULL) + return; + + if (ctx->meth->reset != NULL) + ctx->meth->reset(ctx->algctx); +} + +size_t EVP_KDF_CTX_get_kdf_size(EVP_KDF_CTX *ctx) +{ + OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; + size_t s = 0; + + if (ctx == NULL) + return 0; + + *params = OSSL_PARAM_construct_size_t(OSSL_KDF_PARAM_SIZE, &s); + if (ctx->meth->get_ctx_params != NULL + && ctx->meth->get_ctx_params(ctx->algctx, params)) + return s; + if (ctx->meth->get_params != NULL + && ctx->meth->get_params(params)) + return s; + return 0; +} + +int EVP_KDF_derive(EVP_KDF_CTX *ctx, unsigned char *key, size_t keylen, + const OSSL_PARAM params[]) +{ + if (ctx == NULL) + return 0; + + return ctx->meth->derive(ctx->algctx, key, keylen, params); +} + +/* + * The {get,set}_params functions return 1 if there is no corresponding + * function in the implementation. This is the same as if there was one, + * but it didn't recognise any of the given params, i.e. nothing in the + * bag of parameters was useful. + */ +int EVP_KDF_get_params(EVP_KDF *kdf, OSSL_PARAM params[]) +{ + if (kdf->get_params != NULL) + return kdf->get_params(params); + return 1; +} + +int EVP_KDF_CTX_get_params(EVP_KDF_CTX *ctx, OSSL_PARAM params[]) +{ + if (ctx->meth->get_ctx_params != NULL) + return ctx->meth->get_ctx_params(ctx->algctx, params); + return 1; +} + +int EVP_KDF_CTX_set_params(EVP_KDF_CTX *ctx, const OSSL_PARAM params[]) +{ + if (ctx->meth->set_ctx_params != NULL) + return ctx->meth->set_ctx_params(ctx->algctx, params); + return 1; +} + +int EVP_KDF_names_do_all(const EVP_KDF *kdf, + void (*fn)(const char *name, void *data), + void *data) +{ + if (kdf->prov != NULL) + return evp_names_do_all(kdf->prov, kdf->name_id, fn, data); + + return 1; +} |