mirror of
https://github.com/godotengine/godot
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0be6d925dc
Which means that reduz' beloved style which we all became used to will now be changed automatically to remove the first empty line. This makes us lean closer to 1TBS (the one true brace style) instead of hybridating it with some Allman-inspired spacing. There's still the case of braces around single-statement blocks that needs to be addressed (but clang-format can't help with that, but clang-tidy may if we agree about it). Part of #33027.
283 lines
9.9 KiB
C++
283 lines
9.9 KiB
C++
/*************************************************************************/
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/* crypto_mbedtls.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "crypto_mbedtls.h"
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#include "core/os/file_access.h"
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#include "core/engine.h"
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#include "core/io/certs_compressed.gen.h"
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#include "core/io/compression.h"
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#include "core/project_settings.h"
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#ifdef TOOLS_ENABLED
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#include "editor/editor_settings.h"
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#endif
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#define PEM_BEGIN_CRT "-----BEGIN CERTIFICATE-----\n"
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#define PEM_END_CRT "-----END CERTIFICATE-----\n"
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#include "mbedtls/pem.h"
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#include <mbedtls/debug.h>
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CryptoKey *CryptoKeyMbedTLS::create() {
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return memnew(CryptoKeyMbedTLS);
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}
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Error CryptoKeyMbedTLS::load(String p_path) {
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ERR_FAIL_COND_V_MSG(locks, ERR_ALREADY_IN_USE, "Key is in use");
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PackedByteArray out;
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FileAccess *f = FileAccess::open(p_path, FileAccess::READ);
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ERR_FAIL_COND_V_MSG(!f, ERR_INVALID_PARAMETER, "Cannot open CryptoKeyMbedTLS file '" + p_path + "'.");
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int flen = f->get_len();
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out.resize(flen + 1);
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{
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uint8_t *w = out.ptrw();
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f->get_buffer(w, flen);
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w[flen] = 0; //end f string
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}
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memdelete(f);
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int ret = mbedtls_pk_parse_key(&pkey, out.ptr(), out.size(), nullptr, 0);
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// We MUST zeroize the memory for safety!
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mbedtls_platform_zeroize(out.ptrw(), out.size());
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ERR_FAIL_COND_V_MSG(ret, FAILED, "Error parsing private key '" + itos(ret) + "'.");
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return OK;
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}
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Error CryptoKeyMbedTLS::save(String p_path) {
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FileAccess *f = FileAccess::open(p_path, FileAccess::WRITE);
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ERR_FAIL_COND_V_MSG(!f, ERR_INVALID_PARAMETER, "Cannot save CryptoKeyMbedTLS file '" + p_path + "'.");
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unsigned char w[16000];
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memset(w, 0, sizeof(w));
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int ret = mbedtls_pk_write_key_pem(&pkey, w, sizeof(w));
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if (ret != 0) {
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memdelete(f);
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memset(w, 0, sizeof(w)); // Zeroize anything we might have written.
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ERR_FAIL_V_MSG(FAILED, "Error writing key '" + itos(ret) + "'.");
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}
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size_t len = strlen((char *)w);
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f->store_buffer(w, len);
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memdelete(f);
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memset(w, 0, sizeof(w)); // Zeroize temporary buffer.
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return OK;
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}
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X509Certificate *X509CertificateMbedTLS::create() {
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return memnew(X509CertificateMbedTLS);
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}
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Error X509CertificateMbedTLS::load(String p_path) {
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ERR_FAIL_COND_V_MSG(locks, ERR_ALREADY_IN_USE, "Certificate is in use");
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PackedByteArray out;
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FileAccess *f = FileAccess::open(p_path, FileAccess::READ);
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ERR_FAIL_COND_V_MSG(!f, ERR_INVALID_PARAMETER, "Cannot open X509CertificateMbedTLS file '" + p_path + "'.");
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int flen = f->get_len();
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out.resize(flen + 1);
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{
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uint8_t *w = out.ptrw();
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f->get_buffer(w, flen);
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w[flen] = 0; //end f string
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}
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memdelete(f);
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int ret = mbedtls_x509_crt_parse(&cert, out.ptr(), out.size());
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ERR_FAIL_COND_V_MSG(ret, FAILED, "Error parsing some certificates: " + itos(ret));
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return OK;
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}
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Error X509CertificateMbedTLS::load_from_memory(const uint8_t *p_buffer, int p_len) {
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ERR_FAIL_COND_V_MSG(locks, ERR_ALREADY_IN_USE, "Certificate is in use");
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int ret = mbedtls_x509_crt_parse(&cert, p_buffer, p_len);
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ERR_FAIL_COND_V_MSG(ret, FAILED, "Error parsing certificates: " + itos(ret));
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return OK;
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}
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Error X509CertificateMbedTLS::save(String p_path) {
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FileAccess *f = FileAccess::open(p_path, FileAccess::WRITE);
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ERR_FAIL_COND_V_MSG(!f, ERR_INVALID_PARAMETER, "Cannot save X509CertificateMbedTLS file '" + p_path + "'.");
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mbedtls_x509_crt *crt = &cert;
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while (crt) {
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unsigned char w[4096];
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size_t wrote = 0;
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int ret = mbedtls_pem_write_buffer(PEM_BEGIN_CRT, PEM_END_CRT, cert.raw.p, cert.raw.len, w, sizeof(w), &wrote);
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if (ret != 0 || wrote == 0) {
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memdelete(f);
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ERR_FAIL_V_MSG(FAILED, "Error writing certificate '" + itos(ret) + "'.");
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}
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f->store_buffer(w, wrote - 1); // don't write the string terminator
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crt = crt->next;
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}
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memdelete(f);
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return OK;
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}
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Crypto *CryptoMbedTLS::create() {
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return memnew(CryptoMbedTLS);
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}
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void CryptoMbedTLS::initialize_crypto() {
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#ifdef DEBUG_ENABLED
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mbedtls_debug_set_threshold(1);
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#endif
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Crypto::_create = create;
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Crypto::_load_default_certificates = load_default_certificates;
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X509CertificateMbedTLS::make_default();
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CryptoKeyMbedTLS::make_default();
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}
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void CryptoMbedTLS::finalize_crypto() {
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Crypto::_create = nullptr;
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Crypto::_load_default_certificates = nullptr;
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if (default_certs) {
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memdelete(default_certs);
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default_certs = nullptr;
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}
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X509CertificateMbedTLS::finalize();
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CryptoKeyMbedTLS::finalize();
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}
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CryptoMbedTLS::CryptoMbedTLS() {
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mbedtls_ctr_drbg_init(&ctr_drbg);
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mbedtls_entropy_init(&entropy);
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int ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, nullptr, 0);
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if (ret != 0) {
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ERR_PRINT(" failed\n ! mbedtls_ctr_drbg_seed returned an error" + itos(ret));
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}
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}
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CryptoMbedTLS::~CryptoMbedTLS() {
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mbedtls_ctr_drbg_free(&ctr_drbg);
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mbedtls_entropy_free(&entropy);
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}
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X509CertificateMbedTLS *CryptoMbedTLS::default_certs = nullptr;
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X509CertificateMbedTLS *CryptoMbedTLS::get_default_certificates() {
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return default_certs;
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}
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void CryptoMbedTLS::load_default_certificates(String p_path) {
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ERR_FAIL_COND(default_certs != nullptr);
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default_certs = memnew(X509CertificateMbedTLS);
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ERR_FAIL_COND(default_certs == nullptr);
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if (p_path != "") {
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// Use certs defined in project settings.
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default_certs->load(p_path);
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}
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#ifdef BUILTIN_CERTS_ENABLED
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else {
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// Use builtin certs only if user did not override it in project settings.
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PackedByteArray out;
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out.resize(_certs_uncompressed_size + 1);
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uint8_t *w = out.ptrw();
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Compression::decompress(w, _certs_uncompressed_size, _certs_compressed, _certs_compressed_size, Compression::MODE_DEFLATE);
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w[_certs_uncompressed_size] = 0; // Make sure it ends with string terminator
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#ifdef DEBUG_ENABLED
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print_verbose("Loaded builtin certs");
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#endif
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default_certs->load_from_memory(out.ptr(), out.size());
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}
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#endif
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}
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Ref<CryptoKey> CryptoMbedTLS::generate_rsa(int p_bytes) {
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Ref<CryptoKeyMbedTLS> out;
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out.instance();
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int ret = mbedtls_pk_setup(&(out->pkey), mbedtls_pk_info_from_type(MBEDTLS_PK_RSA));
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ERR_FAIL_COND_V(ret != 0, nullptr);
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ret = mbedtls_rsa_gen_key(mbedtls_pk_rsa(out->pkey), mbedtls_ctr_drbg_random, &ctr_drbg, p_bytes, 65537);
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ERR_FAIL_COND_V(ret != 0, nullptr);
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return out;
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}
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Ref<X509Certificate> CryptoMbedTLS::generate_self_signed_certificate(Ref<CryptoKey> p_key, String p_issuer_name, String p_not_before, String p_not_after) {
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Ref<CryptoKeyMbedTLS> key = static_cast<Ref<CryptoKeyMbedTLS>>(p_key);
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ERR_FAIL_COND_V_MSG(key.is_null(), nullptr, "Invalid private key argument.");
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mbedtls_x509write_cert crt;
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mbedtls_x509write_crt_init(&crt);
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mbedtls_x509write_crt_set_subject_key(&crt, &(key->pkey));
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mbedtls_x509write_crt_set_issuer_key(&crt, &(key->pkey));
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mbedtls_x509write_crt_set_subject_name(&crt, p_issuer_name.utf8().get_data());
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mbedtls_x509write_crt_set_issuer_name(&crt, p_issuer_name.utf8().get_data());
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mbedtls_x509write_crt_set_version(&crt, MBEDTLS_X509_CRT_VERSION_3);
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mbedtls_x509write_crt_set_md_alg(&crt, MBEDTLS_MD_SHA256);
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mbedtls_mpi serial;
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mbedtls_mpi_init(&serial);
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uint8_t rand_serial[20];
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mbedtls_ctr_drbg_random(&ctr_drbg, rand_serial, 20);
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ERR_FAIL_COND_V(mbedtls_mpi_read_binary(&serial, rand_serial, 20), nullptr);
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mbedtls_x509write_crt_set_serial(&crt, &serial);
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mbedtls_x509write_crt_set_validity(&crt, p_not_before.utf8().get_data(), p_not_after.utf8().get_data());
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mbedtls_x509write_crt_set_basic_constraints(&crt, 1, -1);
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mbedtls_x509write_crt_set_basic_constraints(&crt, 1, 0);
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unsigned char buf[4096];
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memset(buf, 0, 4096);
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Ref<X509CertificateMbedTLS> out;
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out.instance();
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mbedtls_x509write_crt_pem(&crt, buf, 4096, mbedtls_ctr_drbg_random, &ctr_drbg);
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int err = mbedtls_x509_crt_parse(&(out->cert), buf, 4096);
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if (err != 0) {
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mbedtls_mpi_free(&serial);
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mbedtls_x509write_crt_free(&crt);
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ERR_PRINT("Generated invalid certificate: " + itos(err));
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return nullptr;
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}
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mbedtls_mpi_free(&serial);
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mbedtls_x509write_crt_free(&crt);
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return out;
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}
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PackedByteArray CryptoMbedTLS::generate_random_bytes(int p_bytes) {
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PackedByteArray out;
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out.resize(p_bytes);
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mbedtls_ctr_drbg_random(&ctr_drbg, out.ptrw(), p_bytes);
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return out;
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}
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