{ "contractName": "OwnedKeyServerSetWithMigration", "abi": [ { "constant": false, "inputs": [], "name": "renounceOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "owner", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "isOwner", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "payable": true, "stateMutability": "payable", "type": "fallback" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "keyServer", "type": "address" } ], "name": "KeyServerAdded", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "keyServer", "type": "address" } ], "name": "KeyServerRemoved", "type": "event" }, { "anonymous": false, "inputs": [], "name": "MigrationStarted", "type": "event" }, { "anonymous": false, "inputs": [], "name": "MigrationCompleted", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "previousOwner", "type": "address" }, { "indexed": true, "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" }, { "constant": true, "inputs": [], "name": "getCurrentLastChange", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "keyServer", "type": "address" } ], "name": "getCurrentKeyServerIndex", "outputs": [ { "name": "", "type": "uint8" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getCurrentKeyServersCount", "outputs": [ { "name": "", "type": "uint8" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "index", "type": "uint8" } ], "name": "getCurrentKeyServer", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getCurrentKeyServers", "outputs": [ { "name": "", "type": "address[]" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "keyServer", "type": "address" } ], "name": "getCurrentKeyServerPublic", "outputs": [ { "name": "", "type": "bytes" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "keyServer", "type": "address" } ], "name": "getCurrentKeyServerAddress", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getMigrationKeyServers", "outputs": [ { "name": "", "type": "address[]" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "keyServer", "type": "address" } ], "name": "getMigrationKeyServerPublic", "outputs": [ { "name": "", "type": "bytes" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "keyServer", "type": "address" } ], "name": "getMigrationKeyServerAddress", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getNewKeyServers", "outputs": [ { "name": "", "type": "address[]" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "keyServer", "type": "address" } ], "name": "getNewKeyServerPublic", "outputs": [ { "name": "", "type": "bytes" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "keyServer", "type": "address" } ], "name": "getNewKeyServerAddress", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getMigrationId", "outputs": [ { "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "id", "type": "bytes32" } ], "name": "startMigration", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "id", "type": "bytes32" } ], "name": "confirmMigration", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "getMigrationMaster", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": 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"source": "//! The KeyServerSet contract. Owned version with migration support.\n//!\n//! Copyright 2017 Svyatoslav Nikolsky, Parity Technologies Ltd.\n//!\n//! Licensed under the Apache License, Version 2.0 (the \"License\");\n//! you may not use this file except in compliance with the License.\n//! You may obtain a copy of the License at\n//!\n//! http://www.apache.org/licenses/LICENSE-2.0\n//!\n//! Unless required by applicable law or agreed to in writing, software\n//! distributed under the License is distributed on an \"AS IS\" BASIS,\n//! WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n//! See the License for the specific language governing permissions and\n//! limitations under the License.\n\npragma solidity ^0.4.24;\n\nimport \"openzeppelin-solidity/contracts/ownership/Ownable.sol\";\nimport \"../interfaces/KeyServerSet.sol\";\n\n\n/// Single-owned KeyServerSet with migration support.\ncontract OwnedKeyServerSetWithMigration is Ownable, KeyServerSetWithMigration {\n \n struct KeyServer {\n /// Index in the keyServersList.\n uint8 index;\n /// Public key of key server.\n bytes publicKey;\n /// IP address of key server.\n string ip;\n }\n\n struct Set {\n /// Public keys of all active key servers.\n address[] list;\n /// Mapping public key => server IP address.\n mapping(address => KeyServer) map;\n }\n\n /// Is initialized.\n bool isInitialized;\n /// Block at which current\n uint256 currentSetChangeBlock;\n /// Current key servers set.\n Set currentSet;\n /// Migration key servers set.\n Set migrationSet;\n /// New key servers set.\n Set newSet;\n /// Migration master.\n address migrationMaster;\n /// Migration id.\n bytes32 migrationId;\n /// Required migration confirmations.\n mapping(address => bool) migrationConfirmations;\n\n modifier notAnEmptyString(string value) {\n bytes memory castValue = bytes(value);\n require(castValue.length != 0, \"String is empty.\");\n _;\n }\n\n /// Only if valid public is passed\n modifier isValidPublic(bytes keyServerPublic) {\n require(checkPublic(keyServerPublic), \"Public key is not valid.\");\n _;\n }\n\n /// Only run if server is currently on current set.\n modifier isOnCurrentSet(address keyServer) {\n require(keccak256(bytes(currentSet.map[keyServer].ip)) != keccak256(\"\"), \"Server is not in the current set.\");\n _;\n }\n\n /// Only run if server is currently on migration set.\n modifier isOnMigrationSet(address keyServer) {\n require(keccak256(bytes(migrationSet.map[keyServer].ip)) != keccak256(\"\"), \"Server is not in the migrations set.\");\n _;\n }\n\n /// Only run if server is currently on new set.\n modifier isOnNewSet(address keyServer) {\n require(keccak256(bytes(newSet.map[keyServer].ip)) != keccak256(\"\"), \"Server is not in the new set.\");\n _;\n }\n\n /// Only run if server is currently on new set.\n modifier isNotOnNewSet(address keyServer) {\n require(keccak256(bytes(newSet.map[keyServer].ip)) == keccak256(\"\"), \"Server is in the new set.\");\n _;\n }\n\n /// Only when no active migration process.\n modifier noActiveMigration {\n require(migrationMaster == address(0), \"There is an active migration.\");\n _;\n }\n\n /// Only when migration with given id is in progress.\n modifier isActiveMigration(bytes32 id) {\n require(migrationId == id, \"Migration with given id is not active.\");\n _;\n }\n\n /// Only when migration id is valid.\n modifier isValidMigrationId(bytes32 id) {\n require(id != bytes32(0), \"Migration id is not valid.\");\n _;\n }\n\n /// Only when migration is required.\n modifier whenMigrationRequired {\n require(!areEqualSets(currentSet, newSet), \"Migration is not required.\");\n _;\n }\n\n /// Only run when sender is potential participant of migration.\n modifier isPossibleMigrationParticipant {\n require(\n keccak256(bytes(currentSet.map[msg.sender].ip)) != keccak256(\"\") ||\n keccak256(bytes(newSet.map[msg.sender].ip)) != keccak256(\"\"),\n \"Sender is not a potential migration participant.\");\n _;\n }\n\n /// Only run when sender is participant of migration.\n modifier isMigrationParticipant(address keyServer) {\n require(\n keccak256(bytes(currentSet.map[keyServer].ip)) != keccak256(\"\") ||\n keccak256(bytes(migrationSet.map[keyServer].ip)) != keccak256(\"\"),\n \"Server is not a migration participant.\");\n _;\n }\n\n /// We do not support direct payments.\n function() public payable {\n revert(\"Contract does not support direct payments.\");\n }\n\n /// Get number of block when current set has been changed last time.\n function getCurrentLastChange() external view returns (uint256) {\n return currentSetChangeBlock;\n }\n\n /// Get index of given key server in current set.\n function getCurrentKeyServerIndex(address keyServer) external view returns (uint8) {\n KeyServer storage entry = currentSet.map[keyServer];\n require(keccak256(bytes(entry.ip)) != keccak256(\"\"), \"Entry does not exist.\");\n return entry.index;\n }\n\n /// Get count of key servers in current set.\n function getCurrentKeyServersCount() external view returns (uint8) {\n return uint8(currentSet.list.length);\n }\n\n /// Get address of key server in current set.\n function getCurrentKeyServer(uint8 index) external view returns (address) {\n require(index < currentSet.list.length, \"Index is out of bounds.\");\n return currentSet.list[index];\n }\n\n /// Get all current key servers.\n function getCurrentKeyServers() external view returns (address[]) {\n return currentSet.list;\n }\n\n /// Get current key server public key.\n function getCurrentKeyServerPublic(address keyServer) external view isOnCurrentSet(keyServer) returns (bytes) {\n return currentSet.map[keyServer].publicKey;\n }\n\n /// Get current key server address.\n function getCurrentKeyServerAddress(address keyServer) external view isOnCurrentSet(keyServer) returns (string) {\n return currentSet.map[keyServer].ip;\n }\n\n /// Get all migration key servers.\n function getMigrationKeyServers() external view returns (address[]) {\n return migrationSet.list;\n }\n\n /// Get migration key server public key.\n function getMigrationKeyServerPublic(address keyServer) external view isOnMigrationSet(keyServer) returns (bytes) {\n return migrationSet.map[keyServer].publicKey;\n }\n\n /// Get migration key server address.\n function getMigrationKeyServerAddress(address keyServer) external view isOnMigrationSet(keyServer) returns (string) {\n return migrationSet.map[keyServer].ip;\n }\n\n /// Get all new key servers.\n function getNewKeyServers() external view returns (address[]) {\n return newSet.list;\n }\n\n /// Get new key server public key.\n function getNewKeyServerPublic(address keyServer) external view isOnNewSet(keyServer) returns (bytes) {\n return newSet.map[keyServer].publicKey;\n }\n\n /// Get new key server address.\n function getNewKeyServerAddress(address keyServer) external view isOnNewSet(keyServer) returns (string) {\n return newSet.map[keyServer].ip;\n }\n\n /// Get migration id.\n function getMigrationId() external view isValidMigrationId(migrationId) returns (bytes32) {\n return migrationId;\n }\n\n /// Start migration.\n function startMigration(bytes32 id) external noActiveMigration isValidMigrationId(id) whenMigrationRequired isPossibleMigrationParticipant {\n // migration to empty set is impossible\n require (newSet.list.length != 0, \"Migration to empty set is impossible.\");\n\n migrationMaster = msg.sender;\n migrationId = id;\n copySet(migrationSet, newSet);\n emit MigrationStarted();\n }\n\n /// Confirm migration.\n function confirmMigration(bytes32 id) external isValidMigrationId(id) isActiveMigration(id) isOnMigrationSet(msg.sender) {\n require(!migrationConfirmations[msg.sender], \"Migration is already confirmed.\");\n migrationConfirmations[msg.sender] = true;\n\n // check if migration is completed\n for (uint j = 0; j < migrationSet.list.length; ++j) {\n if (!migrationConfirmations[migrationSet.list[j]]) {\n return;\n }\n }\n\n // migration is completed => delete confirmations\n for (uint m = 0; m < migrationSet.list.length; ++m) {\n delete migrationConfirmations[migrationSet.list[m]];\n }\n delete migrationMaster;\n\n // ...and copy migration set to current set\n copySet(currentSet, migrationSet);\n\n // ...and also delete entries from migration set\n clearSet(migrationSet);\n\n // ...and fire completion event\n emit MigrationCompleted();\n\n // ...and update current server set change block\n currentSetChangeBlock = block.number;\n }\n\n /// Get migration master.\n function getMigrationMaster() external view returns (address) {\n return migrationMaster;\n }\n\n /// Is migration confirmed.\n function isMigrationConfirmed(address keyServer) external view isMigrationParticipant(keyServer) returns (bool) {\n return migrationConfirmations[keyServer];\n }\n\n /// Complete initialization. Before this function is called, all calls to addKeyServer/removeKeyServer\n /// affect both newSet and currentSet.\n function completeInitialization() public onlyOwner {\n require(!isInitialized, \"Not initialized!\");\n isInitialized = true;\n }\n\n /// Add new key server to set.\n function addKeyServer(bytes keyServerPublic, string keyServerIp)\n public\n onlyOwner\n notAnEmptyString(keyServerIp)\n isValidPublic(keyServerPublic)\n isNotOnNewSet(computeAddress(keyServerPublic))\n {\n // append to the new set\n address keyServer = appendToSet(newSet, keyServerPublic, keyServerIp);\n // also append to current set\n if (!isInitialized) {\n appendToSet(currentSet, keyServerPublic, keyServerIp);\n }\n // fire event\n emit KeyServerAdded(keyServer);\n }\n\n /// Remove key server from set.\n function removeKeyServer(address keyServer) public onlyOwner isOnNewSet(keyServer) {\n // remove element from the new set\n removeFromSet(newSet, keyServer);\n // also remove from the current set\n if (!isInitialized) {\n removeFromSet(currentSet, keyServer);\n }\n // fire event\n emit KeyServerRemoved(keyServer);\n }\n\n /// Compute address from public key.\n function computeAddress(bytes keyServerPublic) private pure returns (address) {\n return address(uint(keccak256(keyServerPublic)) & 0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);\n }\n\n /// 'Check' public key.\n function checkPublic(bytes keyServerPublic) private pure returns (bool) {\n return keyServerPublic.length == 64;\n }\n\n /// Copy set (assignment operator).\n function copySet(Set storage set1, Set storage set2) private {\n for (uint i = 0; i < set1.list.length; ++i) {\n delete set1.map[set1.list[i]];\n }\n\n set1.list = set2.list;\n for (uint j = 0; j < set1.list.length; ++j) {\n set1.map[set1.list[j]] = set2.map[set1.list[j]];\n }\n }\n\n /// Clear set.\n function clearSet(Set storage set) private {\n while (set.list.length > 0) {\n address keyServer = set.list[set.list.length - 1];\n delete set.list[set.list.length - 1];\n set.list.length = set.list.length - 1;\n delete set.map[keyServer];\n }\n }\n\n /// Are two sets equal?\n function areEqualSets(Set storage set1, Set storage set2) private view returns (bool) {\n for (uint i = 0; i < set1.list.length; ++i) {\n if (keccak256(bytes(set2.map[set1.list[i]].ip)) == keccak256(\"\")) {\n return false;\n }\n }\n for (uint j = 0; j < set2.list.length; ++j) {\n if (keccak256(bytes(set1.map[set2.list[j]].ip)) == keccak256(\"\")) {\n return false;\n }\n }\n return true;\n }\n\n /// Append new key serer to set.\n function appendToSet(Set storage set, bytes keyServerPublic, string keyServerIp) private returns (address) {\n // we do not support > 256 key servers in the list\n require(set.list.length < 256, \"Number of servers must be smaller than 256.\");\n\n address keyServer = computeAddress(keyServerPublic);\n set.map[keyServer].index = uint8(set.list.length);\n set.map[keyServer].publicKey = keyServerPublic;\n set.map[keyServer].ip = keyServerIp;\n set.list.push(keyServer);\n return keyServer;\n }\n\n /// Remove existing key server set.\n function removeFromSet(Set storage set, address keyServer) private {\n // swap list elements (removedIndex, lastIndex)\n uint8 removedIndex = uint8(set.map[keyServer].index);\n uint8 lastIndex = uint8(set.list.length) - 1;\n address lastKeyServer = set.list[lastIndex];\n set.list[removedIndex] = lastKeyServer;\n set.map[lastKeyServer].index = removedIndex;\n // remove element from list and map\n delete set.list[lastIndex];\n delete set.map[keyServer];\n set.list.length--;\n }\n}", "sourcePath": "/home/aznagy/work/secretstore/secretstore-contracts/contracts/set/OwnedKeyServerSetWithMigration.sol", "ast": { "absolutePath": "/home/aznagy/work/secretstore/secretstore-contracts/contracts/set/OwnedKeyServerSetWithMigration.sol", "exportedSymbols": { "OwnedKeyServerSetWithMigration": [ 4653 ] }, "id": 4654, "nodeType": "SourceUnit", "nodes": [ { "id": 3514, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "709:24:9" }, { "absolutePath": "openzeppelin-solidity/contracts/ownership/Ownable.sol", "file": "openzeppelin-solidity/contracts/ownership/Ownable.sol", "id": 3515, "nodeType": "ImportDirective", "scope": 4654, "sourceUnit": 4824, "src": "735:63:9", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/home/aznagy/work/secretstore/secretstore-contracts/contracts/interfaces/KeyServerSet.sol", "file": "../interfaces/KeyServerSet.sol", "id": 3516, "nodeType": "ImportDirective", "scope": 4654, "sourceUnit": 577, "src": "799:40:9", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 3517, "name": "Ownable", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 4823, "src": "939:7:9", "typeDescriptions": { "typeIdentifier": "t_contract$_Ownable_$4823", "typeString": "contract Ownable" } }, "id": 3518, "nodeType": "InheritanceSpecifier", "src": "939:7:9" }, { "arguments": null, "baseName": { "contractScope": null, "id": 3519, "name": "KeyServerSetWithMigration", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 576, "src": "948:25:9", "typeDescriptions": { "typeIdentifier": "t_contract$_KeyServerSetWithMigration_$576", "typeString": "contract KeyServerSetWithMigration" } }, "id": 3520, "nodeType": "InheritanceSpecifier", "src": "948:25:9" } ], "contractDependencies": [ 576, 4823 ], "contractKind": "contract", "documentation": "Single-owned KeyServerSet with migration support.", "fullyImplemented": true, "id": 4653, "linearizedBaseContracts": [ 4653, 576, 4823 ], "name": "OwnedKeyServerSetWithMigration", "nodeType": "ContractDefinition", "nodes": [ { "canonicalName": "OwnedKeyServerSetWithMigration.KeyServer", "id": 3527, "members": [ { "constant": false, "id": 3522, "name": "index", "nodeType": "VariableDeclaration", "scope": 3527, "src": "1053:11:9", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { 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