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Add hashing context class

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This commit is contained in:
Fabio Alessandrelli 2019-07-19 15:06:43 +02:00
parent 3495d1bfa0
commit cb31b8797e
3 changed files with 205 additions and 0 deletions
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137
core/crypto/hashing_context.cpp Normal file
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@ -0,0 +1,137 @@
/*************************************************************************/
/* hashing_context.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 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 "hashing_context.h"
#include "core/crypto/crypto_core.h"
Error HashingContext::start(HashType p_type) {
ERR_FAIL_COND_V(ctx != NULL, ERR_ALREADY_IN_USE);
_create_ctx(p_type);
ERR_FAIL_COND_V(ctx == NULL, ERR_UNAVAILABLE);
switch (type) {
case HASH_MD5:
return ((CryptoCore::MD5Context *)ctx)->start();
case HASH_SHA1:
return ((CryptoCore::SHA1Context *)ctx)->start();
case HASH_SHA256:
return ((CryptoCore::SHA256Context *)ctx)->start();
}
return ERR_UNAVAILABLE;
}
Error HashingContext::update(PoolByteArray p_chunk) {
ERR_FAIL_COND_V(ctx == NULL, ERR_UNCONFIGURED);
size_t len = p_chunk.size();
PoolByteArray::Read r = p_chunk.read();
switch (type) {
case HASH_MD5:
return ((CryptoCore::MD5Context *)ctx)->update(&r[0], len);
case HASH_SHA1:
return ((CryptoCore::SHA1Context *)ctx)->update(&r[0], len);
case HASH_SHA256:
return ((CryptoCore::SHA256Context *)ctx)->update(&r[0], len);
}
return ERR_UNAVAILABLE;
}
PoolByteArray HashingContext::finish() {
ERR_FAIL_COND_V(ctx == NULL, PoolByteArray());
PoolByteArray out;
Error err = FAILED;
switch (type) {
case HASH_MD5:
out.resize(16);
err = ((CryptoCore::MD5Context *)ctx)->finish(out.write().ptr());
break;
case HASH_SHA1:
out.resize(20);
err = ((CryptoCore::SHA1Context *)ctx)->finish(out.write().ptr());
break;
case HASH_SHA256:
out.resize(32);
err = ((CryptoCore::SHA256Context *)ctx)->finish(out.write().ptr());
break;
}
_delete_ctx();
ERR_FAIL_COND_V(err != OK, PoolByteArray());
return out;
}
void HashingContext::_create_ctx(HashType p_type) {
type = p_type;
switch (type) {
case HASH_MD5:
ctx = memnew(CryptoCore::MD5Context);
break;
case HASH_SHA1:
ctx = memnew(CryptoCore::SHA1Context);
break;
case HASH_SHA256:
ctx = memnew(CryptoCore::SHA256Context);
break;
default:
ctx = NULL;
}
}
void HashingContext::_delete_ctx() {
return;
switch (type) {
case HASH_MD5:
memdelete((CryptoCore::MD5Context *)ctx);
break;
case HASH_SHA1:
memdelete((CryptoCore::SHA1Context *)ctx);
break;
case HASH_SHA256:
memdelete((CryptoCore::SHA256Context *)ctx);
break;
}
ctx = NULL;
}
void HashingContext::_bind_methods() {
ClassDB::bind_method(D_METHOD("start", "type"), &HashingContext::start);
ClassDB::bind_method(D_METHOD("update", "chunk"), &HashingContext::update);
ClassDB::bind_method(D_METHOD("finish"), &HashingContext::finish);
BIND_ENUM_CONSTANT(HASH_MD5);
BIND_ENUM_CONSTANT(HASH_SHA1);
BIND_ENUM_CONSTANT(HASH_SHA256);
}
HashingContext::HashingContext() {
ctx = NULL;
}
HashingContext::~HashingContext() {
if (ctx != NULL)
_delete_ctx();
}

66
core/crypto/hashing_context.h Normal file
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@ -0,0 +1,66 @@
/*************************************************************************/
/* hashing_context.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 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. */
/*************************************************************************/
#ifndef HASHING_CONTEXT_H
#define HASHING_CONTEXT_H
#include "core/reference.h"
class HashingContext : public Reference {
GDCLASS(HashingContext, Reference);
public:
enum HashType {
HASH_MD5,
HASH_SHA1,
HASH_SHA256
};
private:
void *ctx;
HashType type;
protected:
static void _bind_methods();
void _create_ctx(HashType p_type);
void _delete_ctx();
public:
Error start(HashType p_type);
Error update(PoolByteArray p_chunk);
PoolByteArray finish();
HashingContext();
~HashingContext();
};
VARIANT_ENUM_CAST(HashingContext::HashType);
#endif // HASHING_CONTEXT_H

2
core/register_core_types.cpp
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@ -35,6 +35,7 @@
#include "core/compressed_translation.h"
#include "core/core_string_names.h"
#include "core/crypto/crypto.h"
#include "core/crypto/hashing_context.h"
#include "core/engine.h"
#include "core/func_ref.h"
#include "core/input_map.h"
@ -156,6 +157,7 @@ void register_core_types() {
ClassDB::register_class<PacketPeerUDP>();
// Crypto
ClassDB::register_class<HashingContext>();
ClassDB::register_custom_instance_class<X509Certificate>();
ClassDB::register_custom_instance_class<CryptoKey>();
ClassDB::register_custom_instance_class<Crypto>();