Added tightly packed (aka non-standard packed) Solidity hash functions.

tests/make-tests/make-contract-events.js

@@ -89,10 +89,6 @@ function id(text) {
     return crypto.createHash('sha256').update(text).digest().toString('hex').substring(0, 10).toUpperCase();
 }
 
-function getEventName(types) {
-    return 'testEvent';
-}
-
 function createContractSource(test, comments) {
     var events = '';
     var source = '';
@@ -146,15 +142,12 @@ function createContractSource(test, comments) {
         values.push('s' + index);
     });
 
-    events += (
-        indent(1) +
-        'event ' +
-        getEventName(types) +
-        '(' + named.join(', ') + ')' +
-        (test.anonymous ? ' anonymous': '') +
-        ';\n'
-    );
-    source += indent(2) + getEventName(types) + '(' + values.join(', ') + ');\n';
+    events += indent(1) + 'event testEvent(' + named.join(', ') + ')' + (test.anonymous ? ' anonymous': '') + ';\n';
+    source += indent(2) + 'testEvent(' + values.join(', ') + ');\n';
+    ['keccak256', 'ripemd160', 'sha256'].forEach(function(funcName) {
+        events += indent(1) + 'event test_' + funcName + '(bytes32 value);\n';
+        source += indent(2) + 'test_' + funcName + '(' + funcName + '(' + values.join(', ') + '));\n';
+    });
 
     var sourceInit = '';
 
@@ -317,6 +310,16 @@ function makeTests() {
         ]
     });
 
+    tests.push({
+        name: 'bytes5-array',
+        params: [
+            { type: 'bytes5[2]', value: [
+                '0x1122334455',
+                '0x6677889900'
+            ] }
+        ]
+    });
+
     function generate(seed, onlyStatic) {
         switch (utils.randomNumber(seed + '-type', 0, (onlyStatic ? 3: 6))) {
             case 0:
@@ -476,7 +479,7 @@ function makeTests() {
                 });
 
             }).then(function(tx) {
-                if (tx.logs.length !== 1) {
+                if (tx.logs.length !== 4) {
                     console.log('What?', tx);
                     process.exit(1);
                 }
@@ -544,17 +547,27 @@ function makeTests() {
                 });
 
                 resolve({
-                    bytecode: '0x' + contract.bytecode,
-                    data: tx.logs[0].data,
-                    hashed: hashed,
-                    indexed: indexed,
-                    interface: contract.interface,
-                    name: test.name,
-                    source: source,
-                    topics: tx.logs[0].topics,
-                    types: types,
-                    normalizedValues: normalizedValues,
-                    values: values
+                    event: {
+                        bytecode: '0x' + contract.bytecode,
+                        data: tx.logs[0].data,
+                        hashed: hashed,
+                        indexed: indexed,
+                        interface: contract.interface,
+                        name: test.name,
+                        source: source,
+                        topics: tx.logs[0].topics,
+                        types: types,
+                        normalizedValues: normalizedValues,
+                        values: values
+                    },
+                    solidityHash: {
+                        name: test.name,
+                        types: types,
+                        keccak256: tx.logs[1].data,
+                        ripemd160: tx.logs[2].data,
+                        sha256: tx.logs[3].data,
+                        values: values,
+                    }
                 });
             }).catch(function(error) {
                 console.log('TTT', test);
@@ -565,7 +578,14 @@ function makeTests() {
 
     promiseRationing.all(promiseFuncs, 40).then(function(results) {
         console.log('complete', results);
-        utils.saveTests('contract-events', results);
+        var events = [];
+        var solidityHashes = [];
+        results.forEach(function(result) {
+            events.push(result.event);
+            solidityHashes.push(result.solidityHash);
+        });
+        utils.saveTests('contract-events', events);
+        utils.saveTests('solidity-hashes', solidityHashes);
     }, function(error) {
         console.log(error);
     });

tests/make-tests/make-hashes.js

@@ -0,0 +1,29 @@
+'use strict';
+
+var crypto = require('crypto');
+var createKeccakHash = require('keccak');
+
+var utils = require('../utils');
+
+var output = [];
+
+function add(data) {
+    output.push({
+        data: ('0x' + data.toString('hex')),
+        keccak256: '0x' + createKeccakHash('keccak256').update(data).digest().toString('hex'),
+        sha256: '0x' + crypto.createHash('sha256').update(data).digest().toString('hex'),
+        sha512: '0x' + crypto.createHash('sha512').update(data).digest().toString('hex'),
+    });
+}
+
+add(new Buffer([ ]));
+add(new Buffer([ 0 ]));
+add(new Buffer([ 1 ]));
+add(new Buffer([ 0, 1 ]));
+
+for (var i = 0; i < 512; i++) {
+    var data = new Buffer(utils.randomBytes('data-' + i, 1, 128));
+    add(data);
+}
+
+utils.saveTests('hashes', output);

tests/test-utils.js

@@ -106,7 +106,7 @@ describe('Test Namehash', function() {
     });
 });
 
-describe('Test ID hash function', function () {
+describe('Test ID Hash Function', function () {
     var id = require('../utils/id');
 
     var tests = [
@@ -126,4 +126,36 @@ describe('Test ID hash function', function () {
     });
 });
 
-// @TODO: Cryptographics hashes?
+describe('Test Solidity Hash Functions', function() {
+    var solidity = require('../utils/solidity');
+
+    var tests = utils.loadTests('solidity-hashes');
+    ['keccak256', 'sha256'].forEach(function(funcName) {
+        it(('computes ' + funcName + ' correctly'), function() {
+            tests.forEach(function(test, index) {
+                var result = solidity[funcName](test.types, test.values);
+                assert.equal(result, test[funcName],
+                    ('computes solidity-' + funcName + '(' + JSON.stringify(test.values) + ') - ' + test.types));
+            });
+        });
+    });
+});
+
+describe('Test Hash Functions', function() {
+    var keccak256 = require('../utils/keccak256');
+    var sha256 = require('../utils/sha2').sha256;
+
+    var tests = utils.loadTests('hashes');
+
+    it('computes keccak256 correctly', function() {
+        tests.forEach(function(test) {
+            assert.equal(keccak256(test.data), test.keccak256, ('Keccak256 - ' + test.data));
+        });
+    });
+
+    it('computes sha2566 correctly', function() {
+        tests.forEach(function(test) {
+            assert.equal(sha256(test.data), test.sha256, ('SHA256 - ' + test.data));
+        });
+    });
+});

utils/index.js

@@ -11,6 +11,7 @@ var id = require('./id');
 var keccak256 = require('./keccak256');
 var namehash = require('./namehash');
 var sha256 = require('./sha2').sha256;
+var solidity = require('./solidity');
 var randomBytes = require('./random-bytes');
 var properties = require('./properties');
 var RLP = require('./rlp');
@@ -56,6 +57,10 @@ module.exports = {
     sha256: sha256,
 
     randomBytes: randomBytes,
+
+    solidityPack: solidity.pack,
+    solidityKeccak256: solidity.keccak256,
+    soliditySha256: solidity.sha256,
 }
 
 require('./standalone')({

utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ethers-utils",
-  "version": "2.1.7",
+  "version": "2.1.8",
   "description": "Utilities for the Ethers Ethereum library.",
   "bugs": {
     "url": "http://github.com/ethers-io/ethers.js/issues",

utils/solidity.js

@@ -0,0 +1,93 @@
+'use strict';
+
+var bigNumberify = require('./bignumber').bigNumberify;
+var convert = require('./convert');
+var getAddress = require('./address').getAddress;
+var utf8 = require('./utf8');
+
+var hashKeccak256 = require('./keccak256');
+var hashSha256 = require('./sha2').sha256;
+
+var regexBytes = new RegExp("^bytes([0-9]+)$");
+var regexNumber = new RegExp("^(u?int)([0-9]*)$");
+var regexArray = new RegExp("^(.*)\\[([0-9]*)\\]$");
+
+var Zeros = '0000000000000000000000000000000000000000000000000000000000000000';
+
+function _pack(type, value, isArray) {
+    switch(type) {
+        case 'address':
+            if (isArray) { return convert.padZeros(value, 32); }
+            return convert.arrayify(value);
+        case 'string':
+            return utf8.toUtf8Bytes(value);
+        case 'bytes':
+            return convert.arrayify(value);
+    }
+
+    var match =  type.match(regexNumber);
+    if (match) {
+        var signed = (match[1] === 'int')
+        var size = parseInt(match[2] || "256")
+        if ((size % 8 != 0) || size === 0 || size > 256) {
+            throw new Error('invalid number type - ' + type);
+        }
+
+        if (isArray) { size = 256; }
+
+        value = bigNumberify(value).toTwos(size);
+
+        return convert.padZeros(value, size / 8);
+    }
+
+    match = type.match(regexBytes);
+    if (match) {
+        var size = match[1];
+        if (size != parseInt(size) || size === 0 || size > 32) {
+            throw new Error('invalid number type - ' + type);
+        }
+        size = parseInt(size);
+        if (convert.arrayify(value).byteLength !== size) { throw new Error('invalid value for ' + type); }
+        if (isArray) { return (value + Zeros).substring(0, 66); }
+        return value;
+    }
+
+    match = type.match(regexArray);
+    if (match) {
+        var baseType = match[1];
+        var count = parseInt(match[2] || value.length);
+        if (count != value.length) { throw new Error('invalid value for ' + type); }
+        var result = [];
+        value.forEach(function(value) {
+            value = _pack(baseType, value, true);
+            result.push(value);
+        });
+        return convert.concat(result);
+    }
+
+    throw new Error('unknown type - ' + type);
+}
+
+function pack(types, values) {
+    if (types.length != values.length) { throw new Error('type/value count mismatch'); }
+    var tight = [];
+    types.forEach(function(type, index) {
+        tight.push(_pack(type, values[index]));
+    });
+    return convert.hexlify(convert.concat(tight));
+}
+
+function keccak256(types, values) {
+    return hashKeccak256(pack(types, values));
+}
+
+function sha256(types, values) {
+    return hashSha256(pack(types, values));
+}
+
+module.exports = {
+    pack: pack,
+
+    keccak256: keccak256,
+    sha256: sha256,
+}