d95794ec8a
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
248 lines
9.8 KiB
C++
248 lines
9.8 KiB
C++
/**************************************************************************/
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/* crypto_core.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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_core.h"
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#include "core/os/os.h"
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#include <mbedtls/aes.h>
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#include <mbedtls/base64.h>
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#include <mbedtls/ctr_drbg.h>
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#include <mbedtls/entropy.h>
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#include <mbedtls/md5.h>
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#include <mbedtls/sha1.h>
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#include <mbedtls/sha256.h>
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// RandomGenerator
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CryptoCore::RandomGenerator::RandomGenerator() {
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entropy = memalloc(sizeof(mbedtls_entropy_context));
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mbedtls_entropy_init((mbedtls_entropy_context *)entropy);
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mbedtls_entropy_add_source((mbedtls_entropy_context *)entropy, &CryptoCore::RandomGenerator::_entropy_poll, nullptr, 256, MBEDTLS_ENTROPY_SOURCE_STRONG);
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ctx = memalloc(sizeof(mbedtls_ctr_drbg_context));
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mbedtls_ctr_drbg_init((mbedtls_ctr_drbg_context *)ctx);
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}
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CryptoCore::RandomGenerator::~RandomGenerator() {
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mbedtls_ctr_drbg_free((mbedtls_ctr_drbg_context *)ctx);
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memfree(ctx);
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mbedtls_entropy_free((mbedtls_entropy_context *)entropy);
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memfree(entropy);
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}
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int CryptoCore::RandomGenerator::_entropy_poll(void *p_data, unsigned char *r_buffer, size_t p_len, size_t *r_len) {
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*r_len = 0;
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Error err = OS::get_singleton()->get_entropy(r_buffer, p_len);
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ERR_FAIL_COND_V(err, MBEDTLS_ERR_ENTROPY_SOURCE_FAILED);
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*r_len = p_len;
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return 0;
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}
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Error CryptoCore::RandomGenerator::init() {
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int ret = mbedtls_ctr_drbg_seed((mbedtls_ctr_drbg_context *)ctx, mbedtls_entropy_func, (mbedtls_entropy_context *)entropy, nullptr, 0);
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if (ret) {
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ERR_FAIL_COND_V_MSG(ret, FAILED, " failed\n ! mbedtls_ctr_drbg_seed returned an error" + itos(ret));
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}
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return OK;
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}
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Error CryptoCore::RandomGenerator::get_random_bytes(uint8_t *r_buffer, size_t p_bytes) {
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ERR_FAIL_COND_V(!ctx, ERR_UNCONFIGURED);
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int ret = mbedtls_ctr_drbg_random((mbedtls_ctr_drbg_context *)ctx, r_buffer, p_bytes);
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ERR_FAIL_COND_V_MSG(ret, FAILED, " failed\n ! mbedtls_ctr_drbg_seed returned an error" + itos(ret));
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return OK;
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}
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// MD5
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CryptoCore::MD5Context::MD5Context() {
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ctx = memalloc(sizeof(mbedtls_md5_context));
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mbedtls_md5_init((mbedtls_md5_context *)ctx);
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}
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CryptoCore::MD5Context::~MD5Context() {
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mbedtls_md5_free((mbedtls_md5_context *)ctx);
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memfree((mbedtls_md5_context *)ctx);
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}
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Error CryptoCore::MD5Context::start() {
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int ret = mbedtls_md5_starts_ret((mbedtls_md5_context *)ctx);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::MD5Context::update(const uint8_t *p_src, size_t p_len) {
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int ret = mbedtls_md5_update_ret((mbedtls_md5_context *)ctx, p_src, p_len);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::MD5Context::finish(unsigned char r_hash[16]) {
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int ret = mbedtls_md5_finish_ret((mbedtls_md5_context *)ctx, r_hash);
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return ret ? FAILED : OK;
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}
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// SHA1
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CryptoCore::SHA1Context::SHA1Context() {
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ctx = memalloc(sizeof(mbedtls_sha1_context));
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mbedtls_sha1_init((mbedtls_sha1_context *)ctx);
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}
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CryptoCore::SHA1Context::~SHA1Context() {
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mbedtls_sha1_free((mbedtls_sha1_context *)ctx);
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memfree((mbedtls_sha1_context *)ctx);
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}
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Error CryptoCore::SHA1Context::start() {
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int ret = mbedtls_sha1_starts_ret((mbedtls_sha1_context *)ctx);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::SHA1Context::update(const uint8_t *p_src, size_t p_len) {
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int ret = mbedtls_sha1_update_ret((mbedtls_sha1_context *)ctx, p_src, p_len);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::SHA1Context::finish(unsigned char r_hash[20]) {
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int ret = mbedtls_sha1_finish_ret((mbedtls_sha1_context *)ctx, r_hash);
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return ret ? FAILED : OK;
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}
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// SHA256
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CryptoCore::SHA256Context::SHA256Context() {
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ctx = memalloc(sizeof(mbedtls_sha256_context));
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mbedtls_sha256_init((mbedtls_sha256_context *)ctx);
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}
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CryptoCore::SHA256Context::~SHA256Context() {
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mbedtls_sha256_free((mbedtls_sha256_context *)ctx);
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memfree((mbedtls_sha256_context *)ctx);
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}
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Error CryptoCore::SHA256Context::start() {
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int ret = mbedtls_sha256_starts_ret((mbedtls_sha256_context *)ctx, 0);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::SHA256Context::update(const uint8_t *p_src, size_t p_len) {
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int ret = mbedtls_sha256_update_ret((mbedtls_sha256_context *)ctx, p_src, p_len);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::SHA256Context::finish(unsigned char r_hash[32]) {
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int ret = mbedtls_sha256_finish_ret((mbedtls_sha256_context *)ctx, r_hash);
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return ret ? FAILED : OK;
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}
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// AES256
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CryptoCore::AESContext::AESContext() {
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ctx = memalloc(sizeof(mbedtls_aes_context));
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mbedtls_aes_init((mbedtls_aes_context *)ctx);
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}
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CryptoCore::AESContext::~AESContext() {
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mbedtls_aes_free((mbedtls_aes_context *)ctx);
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memfree((mbedtls_aes_context *)ctx);
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}
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Error CryptoCore::AESContext::set_encode_key(const uint8_t *p_key, size_t p_bits) {
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int ret = mbedtls_aes_setkey_enc((mbedtls_aes_context *)ctx, p_key, p_bits);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::AESContext::set_decode_key(const uint8_t *p_key, size_t p_bits) {
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int ret = mbedtls_aes_setkey_dec((mbedtls_aes_context *)ctx, p_key, p_bits);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::AESContext::encrypt_ecb(const uint8_t p_src[16], uint8_t r_dst[16]) {
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int ret = mbedtls_aes_crypt_ecb((mbedtls_aes_context *)ctx, MBEDTLS_AES_ENCRYPT, p_src, r_dst);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::AESContext::encrypt_cbc(size_t p_length, uint8_t r_iv[16], const uint8_t *p_src, uint8_t *r_dst) {
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int ret = mbedtls_aes_crypt_cbc((mbedtls_aes_context *)ctx, MBEDTLS_AES_ENCRYPT, p_length, r_iv, p_src, r_dst);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::AESContext::encrypt_cfb(size_t p_length, uint8_t p_iv[16], const uint8_t *p_src, uint8_t *r_dst) {
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size_t iv_off = 0; // Ignore and assume 16-byte alignment.
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int ret = mbedtls_aes_crypt_cfb128((mbedtls_aes_context *)ctx, MBEDTLS_AES_ENCRYPT, p_length, &iv_off, p_iv, p_src, r_dst);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::AESContext::decrypt_ecb(const uint8_t p_src[16], uint8_t r_dst[16]) {
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int ret = mbedtls_aes_crypt_ecb((mbedtls_aes_context *)ctx, MBEDTLS_AES_DECRYPT, p_src, r_dst);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::AESContext::decrypt_cbc(size_t p_length, uint8_t r_iv[16], const uint8_t *p_src, uint8_t *r_dst) {
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int ret = mbedtls_aes_crypt_cbc((mbedtls_aes_context *)ctx, MBEDTLS_AES_DECRYPT, p_length, r_iv, p_src, r_dst);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::AESContext::decrypt_cfb(size_t p_length, uint8_t p_iv[16], const uint8_t *p_src, uint8_t *r_dst) {
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size_t iv_off = 0; // Ignore and assume 16-byte alignment.
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int ret = mbedtls_aes_crypt_cfb128((mbedtls_aes_context *)ctx, MBEDTLS_AES_DECRYPT, p_length, &iv_off, p_iv, p_src, r_dst);
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return ret ? FAILED : OK;
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}
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// CryptoCore
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String CryptoCore::b64_encode_str(const uint8_t *p_src, int p_src_len) {
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int b64len = p_src_len / 3 * 4 + 4 + 1;
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Vector<uint8_t> b64buff;
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b64buff.resize(b64len);
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uint8_t *w64 = b64buff.ptrw();
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size_t strlen = 0;
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int ret = b64_encode(&w64[0], b64len, &strlen, p_src, p_src_len);
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w64[strlen] = 0;
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return ret ? String() : (const char *)&w64[0];
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}
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Error CryptoCore::b64_encode(uint8_t *r_dst, int p_dst_len, size_t *r_len, const uint8_t *p_src, int p_src_len) {
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int ret = mbedtls_base64_encode(r_dst, p_dst_len, r_len, p_src, p_src_len);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::b64_decode(uint8_t *r_dst, int p_dst_len, size_t *r_len, const uint8_t *p_src, int p_src_len) {
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int ret = mbedtls_base64_decode(r_dst, p_dst_len, r_len, p_src, p_src_len);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::md5(const uint8_t *p_src, int p_src_len, unsigned char r_hash[16]) {
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int ret = mbedtls_md5_ret(p_src, p_src_len, r_hash);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::sha1(const uint8_t *p_src, int p_src_len, unsigned char r_hash[20]) {
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int ret = mbedtls_sha1_ret(p_src, p_src_len, r_hash);
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return ret ? FAILED : OK;
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}
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Error CryptoCore::sha256(const uint8_t *p_src, int p_src_len, unsigned char r_hash[32]) {
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int ret = mbedtls_sha256_ret(p_src, p_src_len, r_hash, 0);
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return ret ? FAILED : OK;
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}
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