135 lines
4.7 KiB
C++
135 lines
4.7 KiB
C++
/*************************************************************************/
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/* hashing_context.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 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 "hashing_context.h"
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#include "core/crypto/crypto_core.h"
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Error HashingContext::start(HashType p_type) {
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ERR_FAIL_COND_V(ctx != nullptr, ERR_ALREADY_IN_USE);
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_create_ctx(p_type);
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ERR_FAIL_COND_V(ctx == nullptr, ERR_UNAVAILABLE);
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switch (type) {
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case HASH_MD5:
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return ((CryptoCore::MD5Context *)ctx)->start();
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case HASH_SHA1:
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return ((CryptoCore::SHA1Context *)ctx)->start();
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case HASH_SHA256:
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return ((CryptoCore::SHA256Context *)ctx)->start();
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}
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return ERR_UNAVAILABLE;
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}
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Error HashingContext::update(PackedByteArray p_chunk) {
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ERR_FAIL_COND_V(ctx == nullptr, ERR_UNCONFIGURED);
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size_t len = p_chunk.size();
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ERR_FAIL_COND_V(len == 0, FAILED);
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const uint8_t *r = p_chunk.ptr();
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switch (type) {
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case HASH_MD5:
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return ((CryptoCore::MD5Context *)ctx)->update(&r[0], len);
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case HASH_SHA1:
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return ((CryptoCore::SHA1Context *)ctx)->update(&r[0], len);
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case HASH_SHA256:
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return ((CryptoCore::SHA256Context *)ctx)->update(&r[0], len);
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}
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return ERR_UNAVAILABLE;
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}
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PackedByteArray HashingContext::finish() {
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ERR_FAIL_COND_V(ctx == nullptr, PackedByteArray());
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PackedByteArray out;
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Error err = FAILED;
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switch (type) {
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case HASH_MD5:
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out.resize(16);
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err = ((CryptoCore::MD5Context *)ctx)->finish(out.ptrw());
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break;
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case HASH_SHA1:
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out.resize(20);
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err = ((CryptoCore::SHA1Context *)ctx)->finish(out.ptrw());
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break;
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case HASH_SHA256:
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out.resize(32);
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err = ((CryptoCore::SHA256Context *)ctx)->finish(out.ptrw());
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break;
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}
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_delete_ctx();
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ERR_FAIL_COND_V(err != OK, PackedByteArray());
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return out;
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}
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void HashingContext::_create_ctx(HashType p_type) {
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type = p_type;
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switch (type) {
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case HASH_MD5:
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ctx = memnew(CryptoCore::MD5Context);
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break;
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case HASH_SHA1:
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ctx = memnew(CryptoCore::SHA1Context);
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break;
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case HASH_SHA256:
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ctx = memnew(CryptoCore::SHA256Context);
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break;
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default:
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ctx = nullptr;
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}
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}
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void HashingContext::_delete_ctx() {
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switch (type) {
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case HASH_MD5:
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memdelete((CryptoCore::MD5Context *)ctx);
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break;
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case HASH_SHA1:
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memdelete((CryptoCore::SHA1Context *)ctx);
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break;
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case HASH_SHA256:
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memdelete((CryptoCore::SHA256Context *)ctx);
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break;
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}
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ctx = nullptr;
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}
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void HashingContext::_bind_methods() {
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ClassDB::bind_method(D_METHOD("start", "type"), &HashingContext::start);
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ClassDB::bind_method(D_METHOD("update", "chunk"), &HashingContext::update);
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ClassDB::bind_method(D_METHOD("finish"), &HashingContext::finish);
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BIND_ENUM_CONSTANT(HASH_MD5);
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BIND_ENUM_CONSTANT(HASH_SHA1);
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BIND_ENUM_CONSTANT(HASH_SHA256);
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}
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HashingContext::~HashingContext() {
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if (ctx != nullptr) {
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_delete_ctx();
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}
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}
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