638 lines
16 KiB
Solidity
638 lines
16 KiB
Solidity
pragma solidity ^0.4.17;
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import "./ERC725.sol";
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import "./ERC735.sol";
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contract Identity is ERC725, ERC735 {
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mapping (bytes32 => Key) keys;
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mapping (uint256 => bytes32[]) keysByPurpose;
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mapping (bytes32 => Claim) claims;
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mapping (uint256 => bytes32[]) claimsByType;
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mapping (bytes32 => uint256) indexes;
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mapping (uint => Transaction) txx;
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mapping (uint256 => uint256) minimumApprovalsByKeyPurpose;
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bytes32[] pendingTransactions;
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uint nonce = 0;
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address recoveryContract;
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address recoveryManager;
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struct Transaction {
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address to;
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uint value;
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bytes data;
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uint nonce;
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uint approverCount;
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mapping(bytes32 => bool) approvals;
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}
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modifier managerOnly {
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require(
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isKeyPurpose(bytes32(msg.sender), MANAGEMENT_KEY)
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);
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_;
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}
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modifier managementOnly {
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if(msg.sender == address(this)) {
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_;
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} else {
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require(isKeyPurpose(bytes32(msg.sender), MANAGEMENT_KEY));
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if (minimumApprovalsByKeyPurpose[MANAGEMENT_KEY] == 1) {
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_;
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} else {
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execute(address(this), 0, msg.data);
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}
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}
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}
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modifier recoveryOnly {
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require(
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recoveryContract != address(0) &&
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msg.sender == address(recoveryContract)
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);
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_;
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}
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modifier keyPurposeOnly(bytes32 _key, uint256 _purpose) {
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require(isKeyPurpose(_key, _purpose));
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_;
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}
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modifier managerOrActor(bytes32 _key) {
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require(
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isKeyPurpose(_key, MANAGEMENT_KEY) ||
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isKeyPurpose(_key, ACTION_KEY)
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);
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_;
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}
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modifier validECDSAKey (
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bytes32 _key,
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bytes32 _signHash,
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uint8 _v,
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bytes32 _r,
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bytes32 _s
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)
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{
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require(
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address(_key) == ecrecover(
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keccak256("\x19Ethereum Signed Message:\n32", _signHash),
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_v,
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_r,
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_s
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)
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);
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require(keys[_key].purpose != 0);
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_;
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}
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function Identity() public {
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_constructIdentity(msg.sender);
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}
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function ()
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public
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payable
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{
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}
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function managerReset(address _newKey)
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public
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recoveryOnly
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{
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recoveryManager = _newKey;
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_addKey(bytes32(recoveryManager), MANAGEMENT_KEY, 0);
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minimumApprovalsByKeyPurpose[MANAGEMENT_KEY] = keysByPurpose[MANAGEMENT_KEY].length;
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}
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function processManagerReset(uint256 _limit)
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public
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{
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require(recoveryManager != address(0));
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uint limit = _limit;
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bytes32 newKey = bytes32(recoveryManager);
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bytes32[] memory managers = keysByPurpose[MANAGEMENT_KEY];
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uint256 totalManagers = managers.length;
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if (limit == 0) {
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limit = totalManagers;
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}
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minimumApprovalsByKeyPurpose[MANAGEMENT_KEY] = totalManagers - limit + 1;
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for (uint256 i = 0; i < limit; i++) {
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bytes32 manager = managers[i];
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if (manager != newKey) {
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_removeKey(manager, MANAGEMENT_KEY);
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totalManagers--;
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}
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}
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if (totalManagers == 1) {
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recoveryManager = address(0);
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}
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}
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function addKey(
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bytes32 _key,
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uint256 _purpose,
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uint256 _type
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)
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public
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managementOnly
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returns (bool success)
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{
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_addKey(_key, _purpose, _type);
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return true;
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}
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function replaceKey(
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bytes32 _oldKey,
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bytes32 _newKey,
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uint256 _newType
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)
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public
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managementOnly
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returns (bool success)
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{
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uint256 purpose = keys[_oldKey].purpose;
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_addKey(_newKey, purpose, _newType);
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_removeKey(_oldKey, purpose);
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return true;
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}
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function removeKey(
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bytes32 _key,
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uint256 _purpose
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)
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public
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managementOnly
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returns (bool success)
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{
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_removeKey(_key, _purpose);
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return true;
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}
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function execute(
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address _to,
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uint256 _value,
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bytes _data
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)
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public
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returns (uint256 executionId)
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{
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uint256 requiredKey = _to == address(this) ? MANAGEMENT_KEY : ACTION_KEY;
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if (minimumApprovalsByKeyPurpose[requiredKey] == 1) {
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executionId = nonce; //(?) useless in this case
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nonce++; //(?) should increment
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require(isKeyPurpose(bytes32(msg.sender), requiredKey));
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_to.call.value(_value)(_data); //(?) success not used
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emit Executed(executionId, _to, _value, _data); //no information on success
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} else {
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executionId = _execute(_to, _value, _data);
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approve(executionId, true);
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}
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}
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function approve(uint256 _id, bool _approval)
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public
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managerOrActor(bytes32(msg.sender))
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returns (bool success)
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{
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return _approve(bytes32(msg.sender), _id, _approval);
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}
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function setMinimumApprovalsByKeyType(
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uint256 _purpose,
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uint256 _minimumApprovals
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)
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public
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managementOnly
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{
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require(_minimumApprovals > 0);
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require(_minimumApprovals <= keysByPurpose[_purpose].length);
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minimumApprovalsByKeyPurpose[_purpose] = _minimumApprovals;
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}
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function addClaim(
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uint256 _claimType,
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uint256 _scheme,
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address _issuer,
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bytes _signature,
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bytes _data,
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string _uri
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)
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public
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returns (bytes32 claimHash)
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{
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claimHash = keccak256(_issuer, _claimType);
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if (msg.sender == address(this)) {
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if (claims[claimHash].claimType > 0) {
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_modifyClaim(claimHash, _claimType, _scheme, _issuer, _signature, _data, _uri);
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} else {
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_includeClaim(claimHash, _claimType, _scheme, _issuer, _signature, _data, _uri);
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}
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} else {
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require(_issuer == msg.sender);
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require(isKeyPurpose(bytes32(msg.sender), CLAIM_SIGNER_KEY));
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_execute(address(this), 0, msg.data);
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emit ClaimRequested(
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claimHash,
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_claimType,
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_scheme,
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_issuer,
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_signature,
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_data,
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_uri
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);
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}
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}
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function removeClaim(bytes32 _claimId)
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public
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returns (bool success)
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{
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Claim memory c = claims[_claimId];
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require(
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msg.sender == c.issuer ||
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msg.sender == address(this)
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);
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// MUST only be done by the issuer of the claim, or KEYS OF PURPOSE 1, or the identity itself.
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// TODO If its the identity itself, the approval process will determine its approval.
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uint claimIdTypePos = indexes[_claimId];
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delete indexes[_claimId];
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bytes32[] storage claimsTypeArr = claimsByType[c.claimType];
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bytes32 replacer = claimsTypeArr[claimsTypeArr.length-1];
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claimsTypeArr[claimIdTypePos] = replacer;
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indexes[replacer] = claimIdTypePos;
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delete claims[_claimId];
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claimsTypeArr.length--;
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return true;
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}
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function getKey(
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bytes32 _key,
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uint256 _purpose
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)
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public
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constant
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returns(uint256 purpose, uint256 keyType, bytes32 key)
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{
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Key storage myKey = keys[keccak256(_key, _purpose)];
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return (myKey.purpose, myKey.keyType, myKey.key);
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}
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function isKeyPurpose(bytes32 _key, uint256 _type)
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public
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constant
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returns (bool)
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{
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return keys[keccak256(_key, _type)].purpose == _type;
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}
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function getKeyPurpose(bytes32 _key)
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public
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constant
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returns(uint256[] purpose)
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{
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uint256[] memory purposeHolder = new uint256[](4);
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uint8 counter = 0;
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if (isKeyPurpose(_key, MANAGEMENT_KEY)) {
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purposeHolder[counter] = MANAGEMENT_KEY;
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counter++;
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}
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if (isKeyPurpose(_key, ACTION_KEY)) {
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purposeHolder[counter] = ACTION_KEY;
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counter++;
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}
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if (isKeyPurpose(_key, CLAIM_SIGNER_KEY)) {
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purposeHolder[counter] = CLAIM_SIGNER_KEY;
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counter++;
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}
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if (isKeyPurpose(_key, ENCRYPTION_KEY)) {
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purposeHolder[counter] = ENCRYPTION_KEY;
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counter++;
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}
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uint256[] memory result = new uint256[](counter);
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for (uint8 i = 0; i < counter; i++) {
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result[i] = purposeHolder[i];
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}
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return result;
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}
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function getKeysByPurpose(uint256 _purpose)
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public
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constant
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returns(bytes32[])
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{
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return keysByPurpose[_purpose];
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}
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function getClaim(bytes32 _claimId)
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public
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constant
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returns(
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uint256 claimType,
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uint256 scheme,
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address issuer,
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bytes signature,
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bytes data,
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string uri
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)
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{
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Claim memory _claim = claims[_claimId];
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return (_claim.claimType, _claim.scheme, _claim.issuer, _claim.signature, _claim.data, _claim.uri);
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}
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function getClaimIdsByType(uint256 _claimType)
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public
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constant
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returns(bytes32[] claimIds)
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{
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return claimsByType[_claimType];
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}
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function approveECDSA(
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uint256 _id,
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bool _approval,
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bytes32 _key,
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uint8 _v,
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bytes32 _r,
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bytes32 _s
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)
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public
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validECDSAKey(
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_key,
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keccak256(
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address(this),
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bytes4(keccak256("approve(uint256,bool)")),
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_id,
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_approval
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),
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_v,
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_r,
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_s
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)
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managerOrActor(_key)
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returns (bool success)
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{
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return _approve(_key, _id, _approval);
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}
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function executeECDSA(
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address _to,
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uint256 _value,
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bytes _data,
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uint _nonce,
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bytes32 _key,
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uint8 _v,
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bytes32 _r,
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bytes32 _s
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)
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public
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validECDSAKey(
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_key,
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keccak256(
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address(this),
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bytes4(keccak256("execute(address,uint256,bytes)")),
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_to,
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_value,
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_data,
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_nonce
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),
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_v,
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_r,
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_s
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)
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managerOrActor(_key)
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returns (uint256 executionId)
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{
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executionId = _execute(_to, _value, _data);
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_approve(_key, executionId, true);
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}
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function setupRecovery(address _recoveryContract)
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public
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managementOnly
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{
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require(recoveryContract == address(0));
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recoveryContract = _recoveryContract;
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}
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function _constructIdentity(address _manager)
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internal
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{
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require(keysByPurpose[MANAGEMENT_KEY].length == 0);
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require(minimumApprovalsByKeyPurpose[MANAGEMENT_KEY] == 0);
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_addKey(bytes32(_manager), MANAGEMENT_KEY, 0);
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minimumApprovalsByKeyPurpose[MANAGEMENT_KEY] = 1;
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minimumApprovalsByKeyPurpose[ACTION_KEY] = 1;
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}
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function _execute(
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address _to,
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uint256 _value,
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bytes _data
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)
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private
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returns (uint256 executionId)
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{
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executionId = nonce;
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nonce++;
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txx[executionId] = Transaction({
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to: _to,
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value: _value,
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data: _data,
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nonce: nonce,
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approverCount: 0
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});
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emit ExecutionRequested(executionId, _to, _value, _data);
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}
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function _approve(
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bytes32 _key,
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uint256 _id,
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bool _approval
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)
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private
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returns(bool success) //(?) should return approved instead of success?
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{
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Transaction storage trx = txx[_id];
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uint256 approvalCount;
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uint256 requiredKeyPurpose;
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if (trx.to == address(this)) {
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require(isKeyPurpose(_key, MANAGEMENT_KEY));
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bytes32 managerKeyHash = keccak256(_key, MANAGEMENT_KEY);
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requiredKeyPurpose = MANAGEMENT_KEY;
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approvalCount = _calculateApprovals(managerKeyHash, _approval, trx);
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} else {
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require(isKeyPurpose(_key, ACTION_KEY));
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bytes32 actorKeyHash = keccak256(_key, ACTION_KEY);
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requiredKeyPurpose = ACTION_KEY;
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approvalCount = _calculateApprovals(actorKeyHash, _approval, trx);
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}
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emit Approved(_id, _approval);
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if (approvalCount >= minimumApprovalsByKeyPurpose[requiredKeyPurpose]) {
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//(?) success should be included in event?
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success = trx.to.call.value(trx.value)(trx.data);
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emit Executed(_id, trx.to, trx.value, trx.data);
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}
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}
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function _addKey(
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bytes32 _key,
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uint256 _purpose,
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uint256 _type
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)
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private
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{
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bytes32 keyHash = keccak256(_key, _purpose);
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require(keys[keyHash].purpose == 0);
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require(
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_purpose == MANAGEMENT_KEY ||
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_purpose == ACTION_KEY ||
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_purpose == CLAIM_SIGNER_KEY ||
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_purpose == ENCRYPTION_KEY
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);
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keys[keyHash] = Key(_purpose, _type, _key);
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indexes[keyHash] = keysByPurpose[_purpose].push(_key) - 1;
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emit KeyAdded(_key, _purpose, _type);
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}
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function _removeKey(
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bytes32 _key,
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uint256 _purpose
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)
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private
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{
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if (_purpose == MANAGEMENT_KEY) {
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require(keysByPurpose[MANAGEMENT_KEY].length > minimumApprovalsByKeyPurpose[MANAGEMENT_KEY]);
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}
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bytes32 keyHash = keccak256(_key, _purpose);
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Key memory myKey = keys[keyHash];
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uint index = indexes[keyHash];
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bytes32 indexReplacer = keysByPurpose[_purpose][keysByPurpose[_purpose].length - 1];
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keysByPurpose[_purpose][index] = indexReplacer;
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indexes[keccak256(indexReplacer, _purpose)] = index;
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keysByPurpose[_purpose].length--;
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delete indexes[keyHash];
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delete keys[keyHash];
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emit KeyRemoved(myKey.key, myKey.purpose, myKey.keyType);
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}
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function _calculateApprovals(
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bytes32 _keyHash,
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bool _approval,
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Transaction storage trx
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)
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private
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returns (uint256 approvalCount)
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{
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require(trx.approvals[_keyHash] != _approval);
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trx.approvals[_keyHash] = _approval;
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if (_approval) {
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trx.approverCount++;
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} else {
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trx.approverCount--;
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}
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return trx.approverCount;
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}
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function _includeClaim(
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bytes32 _claimHash,
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uint256 _claimType,
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uint256 _scheme,
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address _issuer,
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bytes _signature,
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bytes _data,
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string _uri
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)
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private
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{
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claims[_claimHash] = Claim(
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{
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claimType: _claimType,
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scheme: _scheme,
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issuer: _issuer,
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signature: _signature,
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data: _data,
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uri: _uri
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}
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);
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indexes[_claimHash] = claimsByType[_claimType].length;
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claimsByType[_claimType].push(_claimHash);
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emit ClaimAdded(
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_claimHash,
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_claimType,
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_scheme,
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_issuer,
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_signature,
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_data,
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_uri
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);
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}
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function _modifyClaim(
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bytes32 _claimHash,
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uint256 _claimType,
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uint256 _scheme,
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address _issuer,
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bytes _signature,
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bytes _data,
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string _uri
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)
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private
|
|
{
|
|
require(msg.sender == _issuer);
|
|
claims[_claimHash] = Claim({
|
|
claimType: _claimType,
|
|
scheme: _scheme,
|
|
issuer: _issuer,
|
|
signature: _signature,
|
|
data: _data,
|
|
uri: _uri
|
|
});
|
|
emit ClaimChanged(
|
|
_claimHash,
|
|
_claimType,
|
|
_scheme,
|
|
_issuer,
|
|
_signature,
|
|
_data,
|
|
_uri
|
|
);
|
|
}
|
|
|
|
|
|
}
|
|
|