Error Trying to deploy contract using remix - cryptocurrency

Error : VM error: revert. revert The transaction has been reverted to the initial state. Note: The called function should be payable if you send value and the value you send should be less than your current balance. Debug the transaction to get more information.
I received this error when in was trying to deploy contact using remix. Here is the code :
pragma solidity ^0.6.12;
// SPDX-License-Identifier: Unlicensed
interface IERC20 {
function totalSupply() external view returns (uint256);
/**
* #dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* #dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* #dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* #dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* #dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* #dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* #dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* #dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* #dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* #dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* #dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* #dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* #dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* #dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* #dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* #dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* #dev Collection of functions related to the address type
*/
library Address {
/**
* #dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* #dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* #dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* #dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return _functionCallWithValue(target, data, 0, errorMessage);
}
/**
* #dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* #dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* #dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* #dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* #dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* #dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* #dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* #dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = now + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(_previousOwner == msg.sender, "You don't have permission to unlock");
require(now > _lockTime , "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
// pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB) external view returns (address pair);
function allPairs(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// pragma solidity >=0.6.2;
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract HoneyBee is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _isExcluded;
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private _tTotal = 1000000000 * 10**6 * 10**9;
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private _name = "honey-bee.finance";
string private _symbol = "BEE";
uint8 private _decimals = 9;
uint256 public _taxFee = 2;
uint256 private _previousTaxFee = _taxFee;
uint256 public _liquidityFee = 3;
uint256 private _previousLiquidityFee = _liquidityFee;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
bool inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 public _maxTxAmount = 5000000 * 10**6 * 10**9;
uint256 private numTokensSellToAddToLiquidity = 500000 * 10**6 * 10**9;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor () public {
_rOwned[_msgSender()] = _rTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x05fF2B0DB69458A0750badebc4f9e13aDd608C7F);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
//exclude owner and this contract from fee
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}

Related

Values of member struct get lost after being passed to a function as a pointer

Summary:
I have an issue where my pointer inside a struct gets randomised after being passed to the function.
So I pass the original struct with the pointer being in-tact (I checked it there and it works), but after being passed to the function the stated pointer doesn't work anymore. The pointer points to the same address, but the content of the struct is lost and randomised without any prior data still existing.
Note: All of the signatures like ph_ReturnTypeInt are just specialised types aka. structs where I added additional data which don't matter much in this case, except for the function pointer signatures
Note 2: Since it's a lot of code that might be unimportant I tried to explain what is what, but here the GitHub link if you need it. Else thank you if you can help me ^^
The function being called:
/// Defined wrapper for the function
/// #param call_ctx Call Context for the wrapper
/// #param x Example for how a user argument could look like
ph_ReturnTypeInt DecorateFunc_Wrapper(DecorateFunc_WrapContext *call_ctx, int x)
{
printf("Called wrapper\n");
// ----> Compiler generated ---->
ph_ReturnTypeInt call_r;
// Child Context is null -> Reached lowest level of wrapping
if (!call_ctx->child_ctx && !call_ctx->has_child_ctx)
{
// Calling the wrapped function
call_r = call_ctx->wrapped_func(x);
}
else
{
// Passing the context down one level to the other function
call_r = (*call_ctx->child_ctx).wrapper_func(call_ctx->child_ctx, x);
}
int local_r = call_r.actual_value;
// <---- Compiler generated <----
printf("Finished function call\n");
// ----> Compiler generated ---->
ph_ReturnTypeInt func_r = {
.base.is_exception = false,
.base.is_null = false,
.actual_value = local_r
};
// <---- Compiler generated <----
return func_r;
}
The struct which "loses" its child_ctx pointer:
/// Context for the DecorateFunc Decorator. Contains a child_ctx element to point to a child if it exists. Contains
/// a wrapper function and wrapped function. The wrapped function should be NULL if child_ctx is populated.
typedef struct DecorateFunc_WrapContext {
bool has_child_ctx;
ph_DecoType_Int_Int wrapped_func;
DecorateFunc_Wrapper_Type wrapper_func;
DecorateFunc_WrapContext *child_ctx;
} DecorateFunc_WrapContext;
Function that returns the struct:
/// Decorates a function and returns a struct containing the func and the wrapper specified for this decorator.
/// #param passable Passable struct that can either contain a function or an initialised wrapped struct that should
/// be wrapped again. In both cases the types must match with the target of the decorator to correctly pass
/// the arguments.
DecorateFunc_WrapContext DecorateFunc(DecorateFunc_WrapContext ctx)
{
printf("Called decorator\n");
// ----> Compiler generated ---->
DecorateFunc_WrapContext new_ctx;
// Child Context is null -> Reached lowest level of wrapping / The function does not have any more wrapping
if (!ctx.child_ctx && !ctx.has_child_ctx && !ctx.wrapper_func)
{
new_ctx = (DecorateFunc_WrapContext) {
.has_child_ctx = false,
.wrapper_func = DecorateFunc_Wrapper,
.wrapped_func = ctx.wrapped_func,
.child_ctx = NULL
};
}
else
{
// Creating a new context and passing the context as a child
new_ctx = (DecorateFunc_WrapContext) {
.has_child_ctx = true,
.wrapper_func = DecorateFunc_Wrapper,
.child_ctx = &ctx,
};
}
// <---- Compiler generated <----
return new_ctx;
}
The main function:
int main()
{
DecorateFunc_WrapContext p;
p = (DecorateFunc_WrapContext) { .wrapped_func = &main_func };
DecorateFunc_WrapContext deco_ctx = DecorateFunc(p);
deco_ctx.wrapper_func(&deco_ctx, 15);
/* Wrapping the wrapped context */
DecorateFunc_WrapContext deco_ctx2 = DecorateFunc(deco_ctx);
deco_ctx2.wrapper_func(&deco_ctx2, 20);
}
The function passed as function pointer:
ph_ReturnTypeInt main_func(int x)
{
printf("Called decorated function - Passed argument: %i\n", x);
/* Compiler generated return */
ph_ReturnTypeInt r = {
.base.is_exception = false,
.base.is_null = false,
.actual_value = 3
};
return r;
}
And lastly the additional context (the main file and the other header with the signatures, which shouldn't have a big influence):
// Used content of the header. Other content is just declarations etc.
/* Undefined Base Return which serves as the base for all ReturnTypes */
typedef struct ph_UndefBaseReturn {
bool is_exception;
const char* exception;
const char* traceback;
bool is_null;
} ph_UndefBaseReturn;
/* Para-C Return of Type int. Compiler-Generated */
typedef struct ph_ReturnTypeInt {
ph_UndefBaseReturn base;
int actual_value;
} ph_ReturnTypeInt;
/* Decorator Return Types - Compiler-Generated */
typedef ph_ReturnTypeInt (*ph_DecoType_Int_Int)(int);
// At the top of the main file
typedef struct DecorateFunc_WrapContext DecorateFunc_WrapContext;
/// Signature of the wrapper - Returns int and contains as parameters a int return function and an int
/// This type will be automatically generated for any wrapper, but only used in the decorator for correctly creating
/// the struct which will store the wrapper and wrapped function.
typedef ph_ReturnTypeInt (*DecorateFunc_Wrapper_Type)(DecorateFunc_WrapContext*, int); // R: int - P: struct, int
In main:
/* Wrapping the wrapped context */
DecorateFunc_WrapContext deco_ctx2 = DecorateFunc(deco_ctx);
deco_ctx2.wrapper_func(&deco_ctx2, 20);
In DecorateFunc:
DecorateFunc_WrapContext DecorateFunc(DecorateFunc_WrapContext ctx)
{
...
{
// Creating a new context and passing the context as a child
new_ctx = (DecorateFunc_WrapContext) {
.has_child_ctx = true,
.wrapper_func = DecorateFunc_Wrapper,
.child_ctx = &ctx, // <-- this line
};
}
}
The assignment to child_ctx at <-- this line links new_ctx to a temporary copy of deco_ctx in main(). Since you passed the structure by value, the compiler constructed a temporary copy of it on the stack, then (likely) re-used that area of the stack once the function completed. Your link (.child_ctx) is now dangling.
You need to pass the addresss of new_ctx, adjust DecorateFunc to accept a pointer, assign .child_ctx to that pointer, and adjust your tests to deal with a pointer, it works.

how to use mbedtls_pk_verify to verify signature

How to use this function.
int mbedtls_pk_verify(mbedtls_pk_context * ctx, mbedtls_md_type_t md_alg, const unsigned char * hash, size_t hash_len, const unsigned char * sig, size_t sig_len)
So by calling the function like this mbedtls_pk_verify(&public_key_context, MBEDTLS_MD_SHA1, md, sizeof(md), signature, signature_lenght) how should I initialize md and how do I know what it is?
md is the message digest (usually a hash value).
To verify a signature, you have to feed the message through the same hash algorithm that was used when creating the signature. If the signature was created using SHA1, then you have to calculate the SHA1 hash value for the message you want to verify first. Then you pass this value together with its length (20 bytes in this case) to the function.
You can use the mbedtls library itself to calculate the message digest:
// Get the message digest info structure for SHA1
mbetdtls_md_info_t *mdinfo = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
char *md = malloc(mdinfo->size);
// Calculate the message digest for the data
mbedtls_md(mdinfo, data, datalen, md);
// Now verify the signature for the given hash of the data
int st = mbedtls_pk_verify(&public_key_context,
mdinfo->type, md, mdinfo->size,
signature, signature_length);
if (st != 0) {
// Signature invalid!
} else {
// Signature valid
}
free(md);
This should do what you need.

STM32L082xx AES128 CBC Hardware Encryption using ST's HAL

Decryption is not working as intended on STM32L082xx.
Here is my attempt: I'm using all zeros as iv and key and all 0x42 for plain text.
If I do the same thing in python I get a different result:
I get
{0x7c,0xA5,0xDA,0xBF,0x97,0x18....}
Note I'm using key and IV which are not influenced by endianness so the parameter CRYP_DATATYPE_8B should not be of influence. I have tested with CRYP_DATATYPE_16B, CRYP_DATATYPE_1B, CRYP_DATATYPE_32B with no success. Any ideas?
I've tried with EBC as well, without success.
void TEST_decryption(){
uint8_t encrypted[128]={0x00};
uint8_t decrypted[128]={0x00};
for(int i=0;i<128;i++){
decrypted[i]=0x42;
}
HAL_CRYP_AESCBC_Encrypt(&hcryp, decrypted, 128, encrypted, 10000);
if(encrypted[0]==0xbf){
while(1); //pass
}else{
while(1); //fail
}
}
uint8_t iv[16]={0x00};
uint8_t userKey[16]={0x00};
/* AES init function */
void MX_AES_Init(void)
{
hcryp.Instance = AES;
hcryp.Init.DataType = CRYP_DATATYPE_8B;
hcryp.Init.pKey = &userKey[0];
hcryp.Init.pInitVect = &iv[0];
if (HAL_CRYP_Init(&hcryp) != HAL_OK)
{
Error_Handler();
}
__HAL_RCC_AES_CLK_ENABLE();
}
Same thing in python:
from Crypto.Cipher import AES
key = binascii.unhexlify('0'*32)
IV = binascii.unhexlify('0'*32)
encryptor = AES.new(key, AES.MODE_CBC, IV=IV)
print(binascii.hexlify(encryptor.encrypt(binascii.unhexlify('42'*128))))
output:
b'bfdaa57cb812189713a950ad99478879ec40e0761ed6475fca829d311af9ab3c72099b8b728c5145dc58f99d4fd9f0466ea50ca1a42a98560407c8e716e32bab1db3b30baa48939e253343b3a20f519767bdbb0f9083540b0ba14d289673c8129ae4c31855bf8a35d8ee1a22ce26337c2987e46fde5b448d1021682f5999ab49'
see for live demo : https://repl.it/repls/ImpracticalWhitesmokeCodec
EDIT:
It was suggested to set the key size to 128bit, this is not possible in this lib:
/**
* #brief Writes the Key in Key registers.
* #param hcryp: pointer to a CRYP_HandleTypeDef structure that contains
* the configuration information for CRYP module
* #param Key: Pointer to Key buffer
* #note Key must be written as little endian.
* If Key pointer points at address n,
* n[15:0] contains key[96:127],
* (n+4)[15:0] contains key[64:95],
* (n+8)[15:0] contains key[32:63] and
* (n+12)[15:0] contains key[0:31]
* #retval None
*/
static void CRYP_SetKey(CRYP_HandleTypeDef *hcryp, uint8_t *Key)
{
uint32_t keyaddr = (uint32_t)Key;
hcryp->Instance->KEYR3 = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4U;
hcryp->Instance->KEYR2 = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4U;
hcryp->Instance->KEYR1 = __REV(*(uint32_t*)(keyaddr));
keyaddr+=4U;
hcryp->Instance->KEYR0 = __REV(*(uint32_t*)(keyaddr));
}

Structure to add a node id with correct type

I am trying to specify a node id on my server but don't understand the structure that I am supposed to follow. I followed the seemingly simple structure to change the node ID and didn't receive errors or warnings. I was successful in creating the nodes as seen below but not creating a node_id. I thought to add a simple node id I would follow the same structure and add the lines with $$$$ in them;
// opcua_server.c
#include "ua_types.h"
#define HANDLE_PDU1 15
const uint8_t EN_DISPLAYNAME_PDU1[] = "PDU1";
const UA_UTF8_string_t ENGLISH_TEXT[] = {
{0, 0}, {sizeof(EN_DISPLAYNAME_PDU1) - 1, EN_DISPLAYNAME_PDU1}};
void opcua_add_nodes(void) {
UA_Status_t status = 0;
// Add PDU1 Folder
UA_Folder_t PDU1;
UAServer_Init_config_structure_Folder(&PDU1);
PDU1.node_handle = HANDLE_PDU1;
PDU1.display_name_handle = HANDLE_PDU1;
UA_NodeId_Config_t randomHANDLE; // $$$$ Not creating node id
PDU1.node_id = randomHANDLE; // $$$$ Not creating node id
status = UAServer_Create_Folder(&PDU1);
if (status != 0) {
UA_SERVER_PRINTF("UAServer_Create_Folder returned: %d\n",
(uint16_t)status);
}
status = UAServer_Add_to_folder(folder.node_handle, PDU1.node_handle);
if (status != 0) {
UA_SERVER_PRINTF("UAServer_Add_to_objects_folder returned: %d\n",
(uint16_t)status);
}
}
// ua_types.h
typedef struct {
/**
* A mandatory unique identifier that identifies the node in the library.
* The value zero is invalid.
*/
uint32_t node_handle;
/**
* A mandatory unique identifier that allows the host to efficiently look up
* the
* node name text to display in a translate callback. The value zero is
* invalid.
*/
uint32_t display_name_handle;
/**
* An optional unique identifier that allows the host to efficiently look up
* the
* node description text to display in a translate callback. The value zero
* is
* invalid.
*/
uint32_t description_handle;
/**
* An optional visibility mask that restricts the visibility of the node
* depending
* on which user is logged in. The anonymous user is bit 0 and bits 1 - 15
* represent the corresponding users
*/
uint16_t user_visibility;
/**
* Specifies the namespace index for this node. The UA namespace is 0 and
* cannot
* be used. The default server namespace is 1. Other namespaces may be added
* to the configuration data structure.
*/
uint16_t namespace_index;
/**
* An optional parameter set that defines the NodeId for the node as a
* string
* or a GUID. If this parameter is set to default values then the SDK will
* assign
* an opaque node id to the node. Opaque node ids are easily decoded by the
* SDK
* and offer the best performance. Only populate this parameter set if your
* application requires it.
*/
UA_NodeId_Config_t node_id;
} UA_Base_t;
/*****************************************************************************/
/** \brief A configuration structure for Folder address space nodes.
*
*/
typedef UA_Base_t UA_Folder_t;
/*****************************************************************************/
/** \brief A configuration structure for View address space nodes.
*
*/
typedef UA_Folder_t UA_View_t;
/*****************************************************************************/
/** \brief A configuration structure for Method address space nodes.
*
*/
typedef struct {
/**
* Configuration common to all nodes
*/
UA_Base_t base_config;
/**
* The file size in bytes
*/
uint64_t size;
/**
* The file is writable
*/
bool_t writable;
/**
* An optional writable mask that restricts write access of the file
* depending
* on which user is logged in. The anonymous user is bit 0 and bits 1 - 15
* represent the corresponding users
*/
uint16_t user_writable;
} UA_File_t;
When you define PDU1, a node_id is already created and associated with it. You just need to access node_id and assign value for each of its elements.
Replace
UA_NodeId_Config_t randomHANDLE; // $$$$ Not creating node id
PDU1.node_id = randomHANDLE; // $$$$ Not creating node id
with
PDU1.node_id.identifier_type = xxxx; // xxxx, yyyy, zzz is whatever valid value for their type.
PDU1.node_id.string_identifier = yyyy;
PDU1.node_id.guid_identifier = zzzz;
Turns out I needed to specify the identifier type (which I did by looking at the identifier types) and set it equal to opcua_node_encoding_string. The result is a string node id that I set out to create.
//Add PDU1 Folder
UA_Folder_t PDU1;
UAServer_Init_config_structure_Folder(&PDU1);
PDU1.node_handle = HANDLE_PDU1;
PDU1.display_name_handle = HANDLE_PDU1;
PDU1.node_id.identifier_type = opcua_node_encoding_string;
const char TEST_STRING_ID2[] = "PDU1";
PDU1.node_id.string_identifier.length = sizeof(TEST_STRING_ID2) - 1;
PDU1.node_id.string_identifier.data = (uint8_t*)TEST_STRING_ID2;
status = UAServer_Create_Folder(&PDU1);
if (status != 0)
{
UA_SERVER_PRINTF("UAServer_Create_Folder returned: %d\n", (uint16_t)status);
}
status = UAServer_Add_to_folder(folder.node_handle, PDU1.node_handle);
if (status != 0)
{
UA_SERVER_PRINTF("UAServer_Add_to_objects_folder returned: %d\n", (uint16_t)status);
}

When is CAMLparamX required?

I am writing an interface to a C-library using external declarations in OCaml. I used ctypes for testing but it involved a 100% overhead for fast calls (measured by a core_bench micro benchmark).
The functions look like this:
/* external _create_var : float -> int -> int -> int -> _npnum = "ocaml_tnp_number_create_var" ;; */
value ocaml_tnp_number_create_var(value v, value nr, value p, value o) {
//CAMLparam4(v, nr, p, o);
const int params = Int_val(p);
const int order = Int_val(o);
const int number = Int_val(nr);
const double value = Double_val(v);
return CTYPES_FROM_PTR(tnp_number_create_variable(value, number, params, order));
}
/* external _delete : _npnum -> unit = "ocaml_tnp_number_delete" ;; */
value ocaml_tnp_number_delete(value num) {
//CAMLparam1(num);
struct tnp_number* n = CTYPES_TO_PTR(num);
tnp_number_delete(n);
return Val_unit;
}
I borrowed the CTYPES_* macros, so I am basically moving pointers around as Int64 values.
#define CTYPES_FROM_PTR(P) caml_copy_int64((intptr_t)P)
#define CTYPES_TO_PTR(I64) ((void *)Int64_val(I64))
#define CTYPES_PTR_PLUS(I64, I) caml_copy_int64(Int64_val(I64) + I)
AFAIK, those values are represented as boxes which are tagged as "custom", which should be left untouched by the GC.
Do I need to uncomment the CAMLparamX macros to notify the GC about my usage or is it legal to omit them?
According to the comment in byterun/memory.h your function must start with a CAMLparamN macro with all value parameters.

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