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/*************************************************************************/
/* crypto_core.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "crypto_core.h"
#include <mbedtls/aes.h>
#include <mbedtls/base64.h>
#include <mbedtls/md5.h>
#include <mbedtls/sha1.h>
#include <mbedtls/sha256.h>
// MD5
CryptoCore::MD5Context::MD5Context() {
ctx = memalloc(sizeof(mbedtls_md5_context));
mbedtls_md5_init((mbedtls_md5_context *)ctx);
}
CryptoCore::MD5Context::~MD5Context() {
mbedtls_md5_free((mbedtls_md5_context *)ctx);
memfree((mbedtls_md5_context *)ctx);
}
Error CryptoCore::MD5Context::start() {
int ret = mbedtls_md5_starts_ret((mbedtls_md5_context *)ctx);
return ret ? FAILED : OK;
}
Error CryptoCore::MD5Context::update(const uint8_t *p_src, size_t p_len) {
int ret = mbedtls_md5_update_ret((mbedtls_md5_context *)ctx, p_src, p_len);
return ret ? FAILED : OK;
}
Error CryptoCore::MD5Context::finish(unsigned char r_hash[16]) {
int ret = mbedtls_md5_finish_ret((mbedtls_md5_context *)ctx, r_hash);
return ret ? FAILED : OK;
}
// SHA1
CryptoCore::SHA1Context::SHA1Context() {
ctx = memalloc(sizeof(mbedtls_sha1_context));
mbedtls_sha1_init((mbedtls_sha1_context *)ctx);
}
CryptoCore::SHA1Context::~SHA1Context() {
mbedtls_sha1_free((mbedtls_sha1_context *)ctx);
memfree((mbedtls_sha1_context *)ctx);
}
Error CryptoCore::SHA1Context::start() {
int ret = mbedtls_sha1_starts_ret((mbedtls_sha1_context *)ctx);
return ret ? FAILED : OK;
}
Error CryptoCore::SHA1Context::update(const uint8_t *p_src, size_t p_len) {
int ret = mbedtls_sha1_update_ret((mbedtls_sha1_context *)ctx, p_src, p_len);
return ret ? FAILED : OK;
}
Error CryptoCore::SHA1Context::finish(unsigned char r_hash[20]) {
int ret = mbedtls_sha1_finish_ret((mbedtls_sha1_context *)ctx, r_hash);
return ret ? FAILED : OK;
}
// SHA256
CryptoCore::SHA256Context::SHA256Context() {
ctx = memalloc(sizeof(mbedtls_sha256_context));
mbedtls_sha256_init((mbedtls_sha256_context *)ctx);
}
CryptoCore::SHA256Context::~SHA256Context() {
mbedtls_sha256_free((mbedtls_sha256_context *)ctx);
memfree((mbedtls_sha256_context *)ctx);
}
Error CryptoCore::SHA256Context::start() {
int ret = mbedtls_sha256_starts_ret((mbedtls_sha256_context *)ctx, 0);
return ret ? FAILED : OK;
}
Error CryptoCore::SHA256Context::update(const uint8_t *p_src, size_t p_len) {
int ret = mbedtls_sha256_update_ret((mbedtls_sha256_context *)ctx, p_src, p_len);
return ret ? FAILED : OK;
}
Error CryptoCore::SHA256Context::finish(unsigned char r_hash[32]) {
int ret = mbedtls_sha256_finish_ret((mbedtls_sha256_context *)ctx, r_hash);
return ret ? FAILED : OK;
}
// AES256
CryptoCore::AESContext::AESContext() {
ctx = memalloc(sizeof(mbedtls_aes_context));
mbedtls_aes_init((mbedtls_aes_context *)ctx);
}
CryptoCore::AESContext::~AESContext() {
mbedtls_aes_free((mbedtls_aes_context *)ctx);
memfree((mbedtls_aes_context *)ctx);
}
Error CryptoCore::AESContext::set_encode_key(const uint8_t *p_key, size_t p_bits) {
int ret = mbedtls_aes_setkey_enc((mbedtls_aes_context *)ctx, p_key, p_bits);
return ret ? FAILED : OK;
}
Error CryptoCore::AESContext::set_decode_key(const uint8_t *p_key, size_t p_bits) {
int ret = mbedtls_aes_setkey_dec((mbedtls_aes_context *)ctx, p_key, p_bits);
return ret ? FAILED : OK;
}
Error CryptoCore::AESContext::encrypt_ecb(const uint8_t p_src[16], uint8_t r_dst[16]) {
int ret = mbedtls_aes_crypt_ecb((mbedtls_aes_context *)ctx, MBEDTLS_AES_ENCRYPT, p_src, r_dst);
return ret ? FAILED : OK;
}
Error CryptoCore::AESContext::decrypt_ecb(const uint8_t p_src[16], uint8_t r_dst[16]) {
int ret = mbedtls_aes_crypt_ecb((mbedtls_aes_context *)ctx, MBEDTLS_AES_DECRYPT, p_src, r_dst);
return ret ? FAILED : OK;
}
// CryptoCore
String CryptoCore::b64_encode_str(const uint8_t *p_src, int p_src_len) {
int b64len = p_src_len / 3 * 4 + 4 + 1;
PoolVector<uint8_t> b64buff;
b64buff.resize(b64len);
PoolVector<uint8_t>::Write w64 = b64buff.write();
size_t strlen = 0;
int ret = b64_encode(&w64[0], b64len, &strlen, p_src, p_src_len);
w64[strlen] = 0;
return ret ? String() : (const char *)&w64[0];
}
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) {
int ret = mbedtls_base64_encode(r_dst, p_dst_len, r_len, p_src, p_src_len);
return ret ? FAILED : OK;
}
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) {
int ret = mbedtls_base64_decode(r_dst, p_dst_len, r_len, p_src, p_src_len);
return ret ? FAILED : OK;
}
Error CryptoCore::md5(const uint8_t *p_src, int p_src_len, unsigned char r_hash[16]) {
int ret = mbedtls_md5_ret(p_src, p_src_len, r_hash);
return ret ? FAILED : OK;
}
Error CryptoCore::sha1(const uint8_t *p_src, int p_src_len, unsigned char r_hash[20]) {
int ret = mbedtls_sha1_ret(p_src, p_src_len, r_hash);
return ret ? FAILED : OK;
}
Error CryptoCore::sha256(const uint8_t *p_src, int p_src_len, unsigned char r_hash[32]) {
int ret = mbedtls_sha256_ret(p_src, p_src_len, r_hash, 0);
return ret ? FAILED : OK;
}
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