diff options
Diffstat (limited to 'crypto/evp/kdf_meth.c')
| -rw-r--r-- | crypto/evp/kdf_meth.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/crypto/evp/kdf_meth.c b/crypto/evp/kdf_meth.c new file mode 100644 index 000000000000..94af5d40a091 --- /dev/null +++ b/crypto/evp/kdf_meth.c @@ -0,0 +1,232 @@ +/* + * Copyright 2019-2021 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 + */ + +#include <openssl/evp.h> +#include <openssl/err.h> +#include <openssl/core.h> +#include <openssl/core_dispatch.h> +#include <openssl/kdf.h> +#include "internal/provider.h" +#include "internal/core.h" +#include "crypto/evp.h" +#include "evp_local.h" + +static int evp_kdf_up_ref(void *vkdf) +{ + EVP_KDF *kdf = (EVP_KDF *)vkdf; + int ref = 0; + + CRYPTO_UP_REF(&kdf->refcnt, &ref, kdf->lock); + return 1; +} + +static void evp_kdf_free(void *vkdf) +{ + EVP_KDF *kdf = (EVP_KDF *)vkdf; + int ref = 0; + + if (kdf == NULL) + return; + + CRYPTO_DOWN_REF(&kdf->refcnt, &ref, kdf->lock); + if (ref > 0) + return; + OPENSSL_free(kdf->type_name); + ossl_provider_free(kdf->prov); + CRYPTO_THREAD_lock_free(kdf->lock); + OPENSSL_free(kdf); +} + +static void *evp_kdf_new(void) +{ + EVP_KDF *kdf = NULL; + + if ((kdf = OPENSSL_zalloc(sizeof(*kdf))) == NULL + || (kdf->lock = CRYPTO_THREAD_lock_new()) == NULL) { + OPENSSL_free(kdf); + return NULL; + } + kdf->refcnt = 1; + return kdf; +} + +static void *evp_kdf_from_algorithm(int name_id, + const OSSL_ALGORITHM *algodef, + OSSL_PROVIDER *prov) +{ + const OSSL_DISPATCH *fns = algodef->implementation; + EVP_KDF *kdf = NULL; + int fnkdfcnt = 0, fnctxcnt = 0; + + if ((kdf = evp_kdf_new()) == NULL) { + ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE); + return NULL; + } + kdf->name_id = name_id; + if ((kdf->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) { + evp_kdf_free(kdf); + return NULL; + } + kdf->description = algodef->algorithm_description; + + for (; fns->function_id != 0; fns++) { + switch (fns->function_id) { + case OSSL_FUNC_KDF_NEWCTX: + if (kdf->newctx != NULL) + break; + kdf->newctx = OSSL_FUNC_kdf_newctx(fns); + fnctxcnt++; + break; + case OSSL_FUNC_KDF_DUPCTX: + if (kdf->dupctx != NULL) + break; + kdf->dupctx = OSSL_FUNC_kdf_dupctx(fns); + break; + case OSSL_FUNC_KDF_FREECTX: + if (kdf->freectx != NULL) + break; + kdf->freectx = OSSL_FUNC_kdf_freectx(fns); + fnctxcnt++; + break; + case OSSL_FUNC_KDF_RESET: + if (kdf->reset != NULL) + break; + kdf->reset = OSSL_FUNC_kdf_reset(fns); + break; + case OSSL_FUNC_KDF_DERIVE: + if (kdf->derive != NULL) + break; + kdf->derive = OSSL_FUNC_kdf_derive(fns); + fnkdfcnt++; + break; + case OSSL_FUNC_KDF_GETTABLE_PARAMS: + if (kdf->gettable_params != NULL) + break; + kdf->gettable_params = + OSSL_FUNC_kdf_gettable_params(fns); + break; + case OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS: + if (kdf->gettable_ctx_params != NULL) + break; + kdf->gettable_ctx_params = + OSSL_FUNC_kdf_gettable_ctx_params(fns); + break; + case OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS: + if (kdf->settable_ctx_params != NULL) + break; + kdf->settable_ctx_params = + OSSL_FUNC_kdf_settable_ctx_params(fns); + break; + case OSSL_FUNC_KDF_GET_PARAMS: + if (kdf->get_params != NULL) + break; + kdf->get_params = OSSL_FUNC_kdf_get_params(fns); + break; + case OSSL_FUNC_KDF_GET_CTX_PARAMS: + if (kdf->get_ctx_params != NULL) + break; + kdf->get_ctx_params = OSSL_FUNC_kdf_get_ctx_params(fns); + break; + case OSSL_FUNC_KDF_SET_CTX_PARAMS: + if (kdf->set_ctx_params != NULL) + break; + kdf->set_ctx_params = OSSL_FUNC_kdf_set_ctx_params(fns); + break; + } + } + if (fnkdfcnt != 1 || fnctxcnt != 2) { + /* + * In order to be a consistent set of functions we must have at least + * a derive function, and a complete set of context management + * functions. + */ + evp_kdf_free(kdf); + ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS); + return NULL; + } + kdf->prov = prov; + if (prov != NULL) + ossl_provider_up_ref(prov); + + return kdf; +} + +EVP_KDF *EVP_KDF_fetch(OSSL_LIB_CTX *libctx, const char *algorithm, + const char *properties) +{ + return evp_generic_fetch(libctx, OSSL_OP_KDF, algorithm, properties, + evp_kdf_from_algorithm, evp_kdf_up_ref, + evp_kdf_free); +} + +int EVP_KDF_up_ref(EVP_KDF *kdf) +{ + return evp_kdf_up_ref(kdf); +} + +void EVP_KDF_free(EVP_KDF *kdf) +{ + evp_kdf_free(kdf); +} + +const OSSL_PARAM *EVP_KDF_gettable_params(const EVP_KDF *kdf) +{ + if (kdf->gettable_params == NULL) + return NULL; + return kdf->gettable_params(ossl_provider_ctx(EVP_KDF_get0_provider(kdf))); +} + +const OSSL_PARAM *EVP_KDF_gettable_ctx_params(const EVP_KDF *kdf) +{ + void *alg; + + if (kdf->gettable_ctx_params == NULL) + return NULL; + alg = ossl_provider_ctx(EVP_KDF_get0_provider(kdf)); + return kdf->gettable_ctx_params(NULL, alg); +} + +const OSSL_PARAM *EVP_KDF_settable_ctx_params(const EVP_KDF *kdf) +{ + void *alg; + + if (kdf->settable_ctx_params == NULL) + return NULL; + alg = ossl_provider_ctx(EVP_KDF_get0_provider(kdf)); + return kdf->settable_ctx_params(NULL, alg); +} + +const OSSL_PARAM *EVP_KDF_CTX_gettable_params(EVP_KDF_CTX *ctx) +{ + void *alg; + + if (ctx->meth->gettable_ctx_params == NULL) + return NULL; + alg = ossl_provider_ctx(EVP_KDF_get0_provider(ctx->meth)); + return ctx->meth->gettable_ctx_params(ctx->algctx, alg); +} + +const OSSL_PARAM *EVP_KDF_CTX_settable_params(EVP_KDF_CTX *ctx) +{ + void *alg; + + if (ctx->meth->settable_ctx_params == NULL) + return NULL; + alg = ossl_provider_ctx(EVP_KDF_get0_provider(ctx->meth)); + return ctx->meth->settable_ctx_params(ctx->algctx, alg); +} + +void EVP_KDF_do_all_provided(OSSL_LIB_CTX *libctx, + void (*fn)(EVP_KDF *kdf, void *arg), + void *arg) +{ + evp_generic_do_all(libctx, OSSL_OP_KDF, + (void (*)(void *, void *))fn, arg, + evp_kdf_from_algorithm, evp_kdf_up_ref, evp_kdf_free); +} |