95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
/*
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* This file Copyright (C) 2014 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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/* This file is designed specifically to be included by other source files to
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implement missing (or duplicate) functionality without exposing internal
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details in header files. */
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#include <string_view>
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#include "transmission.h"
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#include "crypto-utils.h"
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#include "tr-assert.h"
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#include "tr-macros.h"
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#include "utils.h"
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/***
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****
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***/
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#ifdef TR_CRYPTO_DH_SECRET_FALLBACK
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/* Most Diffie-Hellman backends handle secret key in the very same way: by
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manually allocating memory for it and storing the value in plain form. */
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struct tr_dh_secret
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{
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size_t key_length;
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uint8_t key[];
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};
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static struct tr_dh_secret* tr_dh_secret_new(size_t key_length)
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{
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auto* handle = static_cast<struct tr_dh_secret*>(tr_malloc(sizeof(struct tr_dh_secret) + key_length));
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handle->key_length = key_length;
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return handle;
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}
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static void tr_dh_secret_align(struct tr_dh_secret* handle, size_t current_key_length)
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{
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tr_dh_align_key(handle->key, current_key_length, handle->key_length);
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}
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std::optional<tr_sha1_digest_t> tr_dh_secret_derive(
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tr_dh_secret_t raw_handle,
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void const* prepend_data,
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size_t prepend_data_size,
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void const* append_data,
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size_t append_data_size)
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{
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TR_ASSERT(raw_handle != nullptr);
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auto const* handle = static_cast<struct tr_dh_secret*>(raw_handle);
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return tr_sha1(
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std::string_view{ static_cast<char const*>(prepend_data), prepend_data_size },
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std::string_view{ reinterpret_cast<char const*>(handle->key), handle->key_length },
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std::string_view{ static_cast<char const*>(append_data), append_data_size });
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}
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void tr_dh_secret_free(tr_dh_secret_t handle)
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{
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tr_free(handle);
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}
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#endif /* TR_CRYPTO_DH_SECRET_FALLBACK */
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#ifdef TR_CRYPTO_X509_FALLBACK
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tr_x509_store_t tr_ssl_get_x509_store(tr_ssl_ctx_t /*handle*/)
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{
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return nullptr;
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}
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bool tr_x509_store_add(tr_x509_store_t /*handle*/, tr_x509_cert_t /*cert*/)
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{
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return false;
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}
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tr_x509_cert_t tr_x509_cert_new(void const* /*der*/, size_t /*der_length*/)
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{
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return nullptr;
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}
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void tr_x509_cert_free(tr_x509_cert_t /*handle*/)
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{
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}
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#endif /* TR_CRYPTO_X509_FALLBACK */
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