Ryan X. Charles
11 years ago
25 changed files with 2325 additions and 39 deletions
@ -1,6 +0,0 @@ |
|||
require('bignum').config({ |
|||
EXPONENTIAL_AT: 9999999, |
|||
DECIMAL_PLACES: 0, |
|||
ROUNDING_MODE: 1, |
|||
}); |
|||
|
|||
@ -0,0 +1,116 @@ |
|||
var crypto = require('crypto'); |
|||
var bignum = require('./Bignum'); |
|||
|
|||
var globalBuffer = new Buffer(1024); |
|||
var zerobuf = new Buffer(0); |
|||
var ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'; |
|||
var ALPHABET_ZERO = ALPHABET[0]; |
|||
var ALPHABET_BUF = new Buffer(ALPHABET, 'ascii'); |
|||
var ALPHABET_INV = {}; |
|||
for(var i=0; i < ALPHABET.length; i++) { |
|||
ALPHABET_INV[ALPHABET[i]] = i; |
|||
}; |
|||
|
|||
// Vanilla Base58 Encoding
|
|||
var base58 = { |
|||
encode: function(buf) { |
|||
var str; |
|||
var x = bignum.fromBuffer(buf); |
|||
var r; |
|||
|
|||
if(buf.length < 512) { |
|||
str = globalBuffer; |
|||
} else { |
|||
str = new Buffer(buf.length << 1); |
|||
} |
|||
var i = str.length - 1; |
|||
while(x.gt(0)) { |
|||
r = x.mod(58); |
|||
x = x.div(58); |
|||
str[i] = ALPHABET_BUF[r.toNumber()]; |
|||
i--; |
|||
} |
|||
|
|||
// deal with leading zeros
|
|||
var j=0; |
|||
while(buf[j] == 0) { |
|||
str[i] = ALPHABET_BUF[0]; |
|||
j++; i--; |
|||
} |
|||
|
|||
return str.slice(i+1,str.length).toString('ascii'); |
|||
}, |
|||
|
|||
decode: function(str) { |
|||
if(str.length == 0) return zerobuf; |
|||
var answer = bignum(0); |
|||
for(var i=0; i<str.length; i++) { |
|||
answer.mul(58) |
|||
answer = answer.mul(58); |
|||
answer = answer.add(ALPHABET_INV[str[i]]); |
|||
}; |
|||
var i = 0; |
|||
while(i < str.length && str[i] == ALPHABET_ZERO) { |
|||
i++; |
|||
} |
|||
if(i > 0) { |
|||
var zb = new Buffer(i); |
|||
zb.fill(0); |
|||
if(i == str.length) return zb; |
|||
answer = answer.toBuffer(); |
|||
return Buffer.concat([zb, answer], i+answer.length); |
|||
} else { |
|||
return answer.toBuffer(); |
|||
} |
|||
}, |
|||
}; |
|||
|
|||
// Base58Check Encoding
|
|||
function sha256(data) { |
|||
return new Buffer(crypto.createHash('sha256').update(data).digest('binary'), 'binary'); |
|||
}; |
|||
|
|||
function doubleSHA256(data) { |
|||
return sha256(sha256(data)); |
|||
}; |
|||
|
|||
var base58Check = { |
|||
encode: function(buf) { |
|||
var checkedBuf = new Buffer(buf.length + 4); |
|||
var hash = doubleSHA256(buf); |
|||
buf.copy(checkedBuf); |
|||
hash.copy(checkedBuf, buf.length); |
|||
return base58.encode(checkedBuf); |
|||
}, |
|||
|
|||
decode: function(s) { |
|||
var buf = base58.decode(s); |
|||
if (buf.length < 4) { |
|||
throw new Error("invalid input: too short"); |
|||
} |
|||
|
|||
var data = buf.slice(0, -4); |
|||
var csum = buf.slice(-4); |
|||
|
|||
var hash = doubleSHA256(data); |
|||
var hash4 = hash.slice(0, 4); |
|||
|
|||
if (csum.toString() != hash4.toString()) { |
|||
throw new Error("checksum mismatch"); |
|||
} |
|||
|
|||
return data; |
|||
}, |
|||
}; |
|||
|
|||
// if you frequently do base58 encodings with data larger
|
|||
// than 512 bytes, you can use this method to expand the
|
|||
// size of the reusable buffer
|
|||
exports.setBuffer = function(buf) { |
|||
globalBuffer = buf; |
|||
}; |
|||
|
|||
exports.base58 = base58; |
|||
exports.base58Check = base58Check; |
|||
exports.encode = base58.encode; |
|||
exports.decode = base58.decode; |
|||
@ -0,0 +1,5 @@ |
|||
if (process.versions) { |
|||
module.exports = require('bignum'); |
|||
return; |
|||
} |
|||
module.exports = require('./browser/Bignum'); |
|||
File diff suppressed because it is too large
@ -0,0 +1,49 @@ |
|||
var assert = require('assert'); |
|||
var base58 = require('../lib/Base58').base58; |
|||
var base58Check = require('../lib/Base58').base58Check; |
|||
|
|||
var testData = [ |
|||
["61", "2g", "C2dGTwc"], |
|||
["626262", "a3gV", "4jF5uERJAK"], |
|||
["636363", "aPEr", "4mT4krqUYJ"], |
|||
["73696d706c792061206c6f6e6720737472696e67", "2cFupjhnEsSn59qHXstmK2ffpLv2", "BXF1HuEUCqeVzZdrKeJjG74rjeXxqJ7dW"], |
|||
["00eb15231dfceb60925886b67d065299925915aeb172c06647", "1NS17iag9jJgTHD1VXjvLCEnZuQ3rJDE9L", "13REmUhe2ckUKy1FvM7AMCdtyYq831yxM3QeyEu4"], |
|||
["516b6fcd0f", "ABnLTmg", "237LSrY9NUUas"], |
|||
["bf4f89001e670274dd", "3SEo3LWLoPntC", "GwDDDeduj1jpykc27e"], |
|||
["572e4794", "3EFU7m", "FamExfqCeza"], |
|||
["ecac89cad93923c02321", "EJDM8drfXA6uyA", "2W1Yd5Zu6WGyKVtHGMrH"], |
|||
["10c8511e", "Rt5zm", "3op3iuGMmhs"], |
|||
["00000000000000000000", "1111111111", "111111111146Momb"], |
|||
["", "", "3QJmnh"] |
|||
]; |
|||
|
|||
//suite('basic');
|
|||
|
|||
test('allData', function() { |
|||
base58.encodeTest = function(raw, b58str) { |
|||
assert.equal(base58.encode(raw), b58str); |
|||
}; |
|||
|
|||
base58.decodeTest = function(raw, b58str) { |
|||
assert.equal(raw.toString('hex'), base58.decode(b58str).toString('hex')); |
|||
}; |
|||
|
|||
base58Check.encodeTest = function(raw, b58str) { |
|||
assert.equal(base58Check.encode(raw), b58str); |
|||
}; |
|||
|
|||
base58Check.decodeTest = function(raw, b58str) { |
|||
assert.equal(raw.toString('hex'), base58Check.decode(b58str).toString('hex')); |
|||
}; |
|||
|
|||
testData.forEach(function(datum) { |
|||
var raw = new Buffer(datum[0], 'hex'); |
|||
var b58 = datum[1]; |
|||
var b58Check = datum[2]; |
|||
|
|||
base58.encodeTest(raw, b58); |
|||
base58.decodeTest(raw, b58); |
|||
base58Check.encodeTest(raw, b58Check); |
|||
base58Check.decodeTest(raw, b58Check); |
|||
}); |
|||
}); |
|||
Loading…
Reference in new issue