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Merge branch account-ids

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This commit is contained in:
wltsmrz
2014-05-15 07:25:16 -07:00
parent 9025119f8d
commit 8979a3cf02
2 changed files with 105 additions and 10 deletions
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52
src/js/ripple/seed.js
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@@ -11,6 +11,7 @@ var BigInteger = utils.jsbn.BigInteger;
var Base = require('./base').Base;
var UInt = require('./uint').UInt;
var UInt256 = require('./uint256').UInt256;
var UInt160 = require('./uint160').UInt160;
var KeyPair = require('./keypair').KeyPair;
var Seed = extend(function () {
@@ -83,16 +84,33 @@ function SHA256_RIPEMD160(bits) {
return sjcl.hash.ripemd160.hash(sjcl.hash.sha256.hash(bits));
};
Seed.prototype.get_key = function (account_id) {
/**
* @param account
* {undefined} take first, default, KeyPair
*
* {Number} specifies the account number of the KeyPair
* desired.
*
* {Uint160} (from_json able), specifies the address matching the KeyPair
* that is desired.
*/
Seed.prototype.get_key = function (account) {
var account_number = 0, address;
if (!this.is_valid()) {
throw new Error('Cannot generate keys from invalid seed!');
}
// XXX Should loop over keys until we find the right one
if (account) {
if (typeof account === 'number') {
account_number = account;
} else {
address = UInt160.from_json(account);
}
}
var private_gen, public_gen;
var curve = this._curve;
var seq = 0, i = 0;
var i = 0;
do {
private_gen = sjcl.bn.fromBits(firstHalfOfSHA512(append_int(this.to_bytes(), i)));
@@ -102,16 +120,30 @@ Seed.prototype.get_key = function (account_id) {
public_gen = curve.G.mult(private_gen);
var sec;
i = 0;
var key_pair;
var max_loops = 1000; // TODO
do {
sec = sjcl.bn.fromBits(firstHalfOfSHA512(append_int(append_int(public_gen.toBytesCompressed(), seq), i)));
i++;
} while (!curve.r.greaterEquals(sec));
i = 0;
sec = sec.add(private_gen).mod(curve.r);
do {
sec = sjcl.bn.fromBits(firstHalfOfSHA512(append_int(append_int(public_gen.toBytesCompressed(), account_number), i)));
i++;
} while (!curve.r.greaterEquals(sec));
return KeyPair.from_bn_secret(sec);
account_number++;
sec = sec.add(private_gen).mod(curve.r);
key_pair = KeyPair.from_bn_secret(sec);
if (--max_loops <= 0) {
// We are almost certainly looking for an account that would take same
// value of $too_long {forever, ...}
throw new Error('Too many loops looking for KeyPair yielding '+
address.to_json() +' from ' + this.to_json());
};
} while (address && !key_pair.get_address().equals(address));
return key_pair;
};
exports.Seed = Seed;