{ "contractName": "SHA1NSEC3Digest", "abi": [ { "constant": true, "inputs": [ { "name": "salt", "type": "bytes" }, { "name": "data", "type": "bytes" }, { "name": "iterations", "type": "uint256" } ], "name": "hash", "outputs": [ { "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "pure", "type": "function" } ], "bytecode": 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"source": "pragma solidity >0.4.23;\n\nimport \"./NSEC3Digest.sol\";\nimport \"@ensdomains/solsha1/contracts/SHA1.sol\";\nimport \"@ensdomains/buffer/contracts/Buffer.sol\";\n\n/**\n* @dev Implements the DNSSEC iterated SHA1 digest used for NSEC3 records.\n*/\ncontract SHA1NSEC3Digest is NSEC3Digest {\n using Buffer for Buffer.buffer;\n\n function hash(bytes calldata salt, bytes calldata data, uint iterations) external pure returns (bytes32) {\n Buffer.buffer memory buf;\n buf.init(salt.length + data.length + 16);\n\n buf.append(data);\n buf.append(salt);\n bytes20 h = SHA1.sha1(buf.buf);\n if (iterations > 0) {\n buf.truncate();\n buf.appendBytes20(bytes20(0));\n buf.append(salt);\n\n for (uint i = 0; i < iterations; i++) {\n buf.writeBytes20(0, h);\n h = SHA1.sha1(buf.buf);\n }\n }\n\n return bytes32(h);\n }\n}\n", "sourcePath": "/home/user/Dropbox/projects/enssec/contracts/nsec3digests/SHA1NSEC3Digest.sol", "ast": { "absolutePath": "/home/user/Dropbox/projects/enssec/contracts/nsec3digests/SHA1NSEC3Digest.sol", "exportedSymbols": { "SHA1NSEC3Digest": [ 3750 ] }, "id": 3751, "nodeType": "SourceUnit", "nodes": [ { "id": 3637, "literals": [ "solidity", ">", "0.4", ".23" ], "nodeType": "PragmaDirective", "src": "0:24:17" }, { "absolutePath": "/home/user/Dropbox/projects/enssec/contracts/nsec3digests/NSEC3Digest.sol", "file": "./NSEC3Digest.sol", "id": 3638, "nodeType": "ImportDirective", "scope": 3751, "sourceUnit": 3636, "src": "26:27:17", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@ensdomains/solsha1/contracts/SHA1.sol", "file": "@ensdomains/solsha1/contracts/SHA1.sol", "id": 3639, "nodeType": "ImportDirective", "scope": 3751, "sourceUnit": 4225, "src": "54:48:17", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@ensdomains/buffer/contracts/Buffer.sol", "file": "@ensdomains/buffer/contracts/Buffer.sol", "id": 3640, "nodeType": "ImportDirective", "scope": 3751, "sourceUnit": 4209, "src": "103:49:17", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 3641, "name": "NSEC3Digest", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3635, "src": "263:11:17", "typeDescriptions": { "typeIdentifier": "t_contract$_NSEC3Digest_$3635", "typeString": "contract NSEC3Digest" } }, "id": 3642, "nodeType": "InheritanceSpecifier", "src": "263:11:17" } ], "contractDependencies": [ 3635 ], "contractKind": "contract", "documentation": "@dev Implements the DNSSEC iterated SHA1 digest used for NSEC3 records.", "fullyImplemented": true, "id": 3750, "linearizedBaseContracts": [ 3750, 3635 ], "name": "SHA1NSEC3Digest", "nodeType": "ContractDefinition", "nodes": [ { "id": 3645, "libraryName": { "contractScope": null, "id": 3643, "name": "Buffer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 4208, "src": "287:6:17", "typeDescriptions": { "typeIdentifier": "t_contract$_Buffer_$4208", "typeString": "library Buffer" } }, "nodeType": "UsingForDirective", "src": "281:31:17", "typeName": { "contractScope": null, "id": 3644, "name": "Buffer.buffer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3757, "src": "298:13:17", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$3757_storage_ptr", "typeString": "struct Buffer.buffer" } } }, { "body": { "id": 3748, "nodeType": "Block", "src": "423:500:17", "statements": [ { "assignments": [ 3659 ], "declarations": [ { "constant": false, "id": 3659, "name": "buf", "nodeType": "VariableDeclaration", "scope": 3748, "src": "433:24:17", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$3757_memory_ptr", "typeString": "struct Buffer.buffer" }, "typeName": { "contractScope": null, "id": 3658, "name": "Buffer.buffer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3757, "src": "433:13:17", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$3757_storage_ptr", "typeString": "struct Buffer.buffer" } }, "value": null, "visibility": "internal" } ], "id": 3660, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "433:24:17" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 3670, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 3668, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 3664, "name": "salt", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3647, "src": "476:4:17", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "id": 3665, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "476:11:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 3666, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3649, "src": "490:4:17", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "id": 3667, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "490:11:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "476:25:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "argumentTypes": null, "hexValue": "3136", "id": 3669, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "504:2:17", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_16_by_1", "typeString": "int_const 16" }, "value": "16" }, "src": "476:30:17", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 3661, "name": "buf", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 3659, "src": "467:3:17", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$3757_memory_ptr", "typeString": "struct Buffer.buffer memory" } }, "id": 3663, "isConstant": false, "isLValue": true, "isPure": false, 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