{ "contractName": "SHA1NSEC3Digest", "abi": [ { "inputs": [ { "internalType": "bytes", "name": "salt", "type": "bytes" }, { "internalType": "bytes", "name": "data", "type": "bytes" }, { "internalType": "uint256", "name": "iterations", "type": "uint256" } ], "name": "hash", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "stateMutability": "pure", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.7.4+commit.3f05b770\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"bytes\",\"name\":\"salt\",\"type\":\"bytes\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"},{\"internalType\":\"uint256\",\"name\":\"iterations\",\"type\":\"uint256\"}],\"name\":\"hash\",\"outputs\":[{\"internalType\":\"bytes32\",\"name\":\"\",\"type\":\"bytes32\"}],\"stateMutability\":\"pure\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Implements the DNSSEC iterated SHA1 digest used for NSEC3 records.\",\"kind\":\"dev\",\"methods\":{\"hash(bytes,bytes,uint256)\":{\"details\":\"Performs an NSEC3 iterated hash.\",\"params\":{\"data\":\"The data to hash.\",\"iterations\":\"The number of iterations to perform.\",\"salt\":\"The salt value to use on each iteration.\"},\"returns\":{\"_0\":\"The result of the iterated hash 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"source": "pragma solidity ^0.7.4;\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 override 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/arachnid/Dropbox/projects/enssec/contracts/nsec3digests/SHA1NSEC3Digest.sol", "ast": { "absolutePath": "/home/arachnid/Dropbox/projects/enssec/contracts/nsec3digests/SHA1NSEC3Digest.sol", "exportedSymbols": { "Buffer": [ 6432 ], "NSEC3Digest": [ 5847 ], "SHA1": [ 6448 ], "SHA1NSEC3Digest": [ 5966 ] }, "id": 5967, "nodeType": "SourceUnit", "nodes": [ { "id": 5849, "literals": [ "solidity", "^", "0.7", ".4" ], "nodeType": "PragmaDirective", "src": "0:23:19" }, { "absolutePath": "/home/arachnid/Dropbox/projects/enssec/contracts/nsec3digests/NSEC3Digest.sol", "file": "./NSEC3Digest.sol", "id": 5850, "nodeType": "ImportDirective", "scope": 5967, "sourceUnit": 5848, "src": "25:27:19", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@ensdomains/solsha1/contracts/SHA1.sol", "file": "@ensdomains/solsha1/contracts/SHA1.sol", "id": 5851, "nodeType": "ImportDirective", "scope": 5967, "sourceUnit": 6449, "src": "53:48:19", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@ensdomains/buffer/contracts/Buffer.sol", "file": "@ensdomains/buffer/contracts/Buffer.sol", "id": 5852, "nodeType": "ImportDirective", "scope": 5967, "sourceUnit": 6433, "src": "102:49:19", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "baseName": { "id": 5854, "name": "NSEC3Digest", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5847, "src": "262:11:19", "typeDescriptions": { "typeIdentifier": "t_contract$_NSEC3Digest_$5847", "typeString": "contract NSEC3Digest" } }, "id": 5855, "nodeType": "InheritanceSpecifier", "src": "262:11:19" } ], "contractDependencies": [ 5847 ], "contractKind": "contract", "documentation": { "id": 5853, "nodeType": "StructuredDocumentation", "src": "153:80:19", "text": " @dev Implements the DNSSEC iterated SHA1 digest used for NSEC3 records." }, "fullyImplemented": true, "id": 5966, "linearizedBaseContracts": [ 5966, 5847 ], "name": "SHA1NSEC3Digest", "nodeType": "ContractDefinition", "nodes": [ { "id": 5858, "libraryName": { "id": 5856, "name": "Buffer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 6432, "src": "286:6:19", "typeDescriptions": { "typeIdentifier": "t_contract$_Buffer_$6432", "typeString": "library Buffer" } }, "nodeType": "UsingForDirective", "src": "280:31:19", "typeName": { "id": 5857, "name": "Buffer.buffer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5974, "src": "297:13:19", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$5974_storage_ptr", "typeString": "struct Buffer.buffer" } } }, { "baseFunctions": [ 5846 ], "body": { "id": 5964, "nodeType": "Block", "src": "431:500:19", "statements": [ { "assignments": [ 5873 ], "declarations": [ { "constant": false, "id": 5873, "mutability": "mutable", "name": "buf", "nodeType": "VariableDeclaration", "scope": 5964, "src": "441:24:19", "stateVariable": false, "storageLocation": "memory", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$5974_memory_ptr", "typeString": "struct Buffer.buffer" }, "typeName": { "id": 5872, "name": "Buffer.buffer", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 5974, "src": "441:13:19", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$5974_storage_ptr", "typeString": "struct Buffer.buffer" } }, "visibility": "internal" } ], "id": 5874, "nodeType": "VariableDeclarationStatement", "src": "441:24:19" }, { "expression": { "arguments": [ { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5884, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 5882, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "expression": { "id": 5878, "name": "salt", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5860, "src": "484:4:19", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "id": 5879, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "src": "484:11:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "expression": { "id": 5880, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5862, "src": "498:4:19", "typeDescriptions": { "typeIdentifier": "t_bytes_calldata_ptr", "typeString": "bytes calldata" } }, "id": 5881, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "length", "nodeType": "MemberAccess", "src": "498:11:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "484:25:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "+", "rightExpression": { "hexValue": "3136", "id": 5883, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "512:2:19", "typeDescriptions": { "typeIdentifier": "t_rational_16_by_1", "typeString": "int_const 16" }, "value": "16" }, "src": "484:30:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "id": 5875, "name": "buf", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 5873, "src": "475:3:19", "typeDescriptions": { "typeIdentifier": "t_struct$_buffer_$5974_memory_ptr", "typeString": "struct Buffer.buffer memory" } }, "id": 5877, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "memberName": "init", "nodeType": "MemberAccess", "referencedDeclaration": 6010, "src": "475:8:19", "typeDescriptions": { "typeIdentifier": 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"scope": 5965, "src": "422:7:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" }, "typeName": { "id": 5867, "name": "bytes32", "nodeType": "ElementaryTypeName", "src": "422:7:19", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "visibility": "internal" } ], "src": "421:9:19" }, "scope": 5966, "src": "317:614:19", "stateMutability": "pure", "virtual": false, "visibility": "external" } ], "scope": 5967, "src": "234:699:19" } ], "src": "0:934:19" }, "compiler": { "name": "solc", "version": "0.7.4+commit.3f05b770.Emscripten.clang" }, "networks": {}, "schemaVersion": "3.3.2", "updatedAt": "2021-01-20T20:53:41.269Z", "devdoc": { "details": "Implements the DNSSEC iterated SHA1 digest used for NSEC3 records.", "kind": "dev", "methods": { "hash(bytes,bytes,uint256)": { "details": "Performs an NSEC3 iterated hash.", "params": { "data": "The data to hash.", "iterations": "The number of iterations to perform.", "salt": "The salt value to use on each iteration." }, "returns": { "_0": "The result of the iterated hash operation." } } }, "version": 1 }, "userdoc": { "kind": "user", "methods": {}, "version": 1 } }