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// Copyright (c) 2014-2017, MyMonero.com
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Original Author: Lucas Jones
// Modified to remove jQuery dep and support modular inclusion of deps by Paul Shapiro (2016)
// Modified by luigi1111 2017
var cnUtil = (function(initConfig) {
var config = {};// shallow copy of initConfig
for (var key in initConfig) {
config[key] = initConfig[key];
}
config.coinUnits = new JSBigInt(10).pow(config.coinUnitPlaces);
var HASH_STATE_BYTES = 200;
var HASH_SIZE = 32;
var ADDRESS_CHECKSUM_SIZE = 4;
var INTEGRATED_ID_SIZE = 8;
var ENCRYPTED_PAYMENT_ID_TAIL = 141;
var CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX = config.addressPrefix;
var CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX = config.integratedAddressPrefix;
var CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX = config.subAddressPrefix;
if (config.testnet === true)
{
CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX = config.addressPrefixTestnet;
CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX = config.integratedAddressPrefixTestnet;
CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX = config.subAddressPrefixTestnet;
}
if (config.stagenet === true)
{
CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX = config.addressPrefixStagenet;
CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX = config.integratedAddressPrefixStagenet;
CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX = config.subAddressPrefixStagenet;
}
var UINT64_MAX = new JSBigInt(2).pow(64);
var CURRENT_TX_VERSION = 2;
var OLD_TX_VERSION = 1;
var RCTTypeFull = 1;
var RCTTypeSimple = 2;
var TX_EXTRA_NONCE_MAX_COUNT = 255;
var TX_EXTRA_TAGS = {
PADDING: '00',
PUBKEY: '01',
NONCE: '02',
MERGE_MINING: '03'
};
var TX_EXTRA_NONCE_TAGS = {
PAYMENT_ID: '00',
ENCRYPTED_PAYMENT_ID: '01'
};
var KEY_SIZE = 32;
var STRUCT_SIZES = {
GE_P3: 160,
GE_P2: 120,
GE_P1P1: 160,
GE_CACHED: 160,
EC_SCALAR: 32,
EC_POINT: 32,
KEY_IMAGE: 32,
GE_DSMP: 160 * 8, // ge_cached * 8
SIGNATURE: 64 // ec_scalar * 2
};
//RCT vars
var H = "8b655970153799af2aeadc9ff1add0ea6c7251d54154cfa92c173a0dd39c1f94"; //base H for amounts
var l = JSBigInt("7237005577332262213973186563042994240857116359379907606001950938285454250989"); //curve order (not RCT specific)
var I = "0100000000000000000000000000000000000000000000000000000000000000"; //identity element
var Z = "0000000000000000000000000000000000000000000000000000000000000000"; //zero scalar
//H2 object to speed up some operations
var H2 = ["8b655970153799af2aeadc9ff1add0ea6c7251d54154cfa92c173a0dd39c1f94", "8faa448ae4b3e2bb3d4d130909f55fcd79711c1c83cdbccadd42cbe1515e8712",
"12a7d62c7791654a57f3e67694ed50b49a7d9e3fc1e4c7a0bde29d187e9cc71d", "789ab9934b49c4f9e6785c6d57a498b3ead443f04f13df110c5427b4f214c739",
"771e9299d94f02ac72e38e44de568ac1dcb2edc6edb61f83ca418e1077ce3de8", "73b96db43039819bdaf5680e5c32d741488884d18d93866d4074a849182a8a64",
"8d458e1c2f68ebebccd2fd5d379f5e58f8134df3e0e88cad3d46701063a8d412", "09551edbe494418e81284455d64b35ee8ac093068a5f161fa6637559177ef404",
"d05a8866f4df8cee1e268b1d23a4c58c92e760309786cdac0feda1d247a9c9a7", "55cdaad518bd871dd1eb7bc7023e1dc0fdf3339864f88fdd2de269fe9ee1832d",
"e7697e951a98cfd5712b84bbe5f34ed733e9473fcb68eda66e3788df1958c306", "f92a970bae72782989bfc83adfaa92a4f49c7e95918b3bba3cdc7fe88acc8d47",
"1f66c2d491d75af915c8db6a6d1cb0cd4f7ddcd5e63d3ba9b83c866c39ef3a2b", "3eec9884b43f58e93ef8deea260004efea2a46344fc5965b1a7dd5d18997efa7",
"b29f8f0ccb96977fe777d489d6be9e7ebc19c409b5103568f277611d7ea84894", "56b1f51265b9559876d58d249d0c146d69a103636699874d3f90473550fe3f2c",
"1d7a36575e22f5d139ff9cc510fa138505576b63815a94e4b012bfd457caaada", "d0ac507a864ecd0593fa67be7d23134392d00e4007e2534878d9b242e10d7620",
"f6c6840b9cf145bb2dccf86e940be0fc098e32e31099d56f7fe087bd5deb5094", "28831a3340070eb1db87c12e05980d5f33e9ef90f83a4817c9f4a0a33227e197",
"87632273d629ccb7e1ed1a768fa2ebd51760f32e1c0b867a5d368d5271055c6e", "5c7b29424347964d04275517c5ae14b6b5ea2798b573fc94e6e44a5321600cfb",
"e6945042d78bc2c3bd6ec58c511a9fe859c0ad63fde494f5039e0e8232612bd5", "36d56907e2ec745db6e54f0b2e1b2300abcb422e712da588a40d3f1ebbbe02f6",
"34db6ee4d0608e5f783650495a3b2f5273c5134e5284e4fdf96627bb16e31e6b", "8e7659fb45a3787d674ae86731faa2538ec0fdf442ab26e9c791fada089467e9",
"3006cf198b24f31bb4c7e6346000abc701e827cfbb5df52dcfa42e9ca9ff0802", "f5fd403cb6e8be21472e377ffd805a8c6083ea4803b8485389cc3ebc215f002a",
"3731b260eb3f9482e45f1c3f3b9dcf834b75e6eef8c40f461ea27e8b6ed9473d", "9f9dab09c3f5e42855c2de971b659328a2dbc454845f396ffc053f0bb192f8c3",
"5e055d25f85fdb98f273e4afe08464c003b70f1ef0677bb5e25706400be620a5", "868bcf3679cb6b500b94418c0b8925f9865530303ae4e4b262591865666a4590",
"b3db6bd3897afbd1df3f9644ab21c8050e1f0038a52f7ca95ac0c3de7558cb7a", "8119b3a059ff2cac483e69bcd41d6d27149447914288bbeaee3413e6dcc6d1eb",
"10fc58f35fc7fe7ae875524bb5850003005b7f978c0c65e2a965464b6d00819c", "5acd94eb3c578379c1ea58a343ec4fcff962776fe35521e475a0e06d887b2db9",
"33daf3a214d6e0d42d2300a7b44b39290db8989b427974cd865db011055a2901", "cfc6572f29afd164a494e64e6f1aeb820c3e7da355144e5124a391d06e9f95ea",
"d5312a4b0ef615a331f6352c2ed21dac9e7c36398b939aec901c257f6cbc9e8e", "551d67fefc7b5b9f9fdbf6af57c96c8a74d7e45a002078a7b5ba45c6fde93e33",
"d50ac7bd5ca593c656928f38428017fc7ba502854c43d8414950e96ecb405dc3", "0773e18ea1be44fe1a97e239573cfae3e4e95ef9aa9faabeac1274d3ad261604",
"e9af0e7ca89330d2b8615d1b4137ca617e21297f2f0ded8e31b7d2ead8714660", "7b124583097f1029a0c74191fe7378c9105acc706695ed1493bb76034226a57b",
"ec40057b995476650b3db98e9db75738a8cd2f94d863b906150c56aac19caa6b", "01d9ff729efd39d83784c0fe59c4ae81a67034cb53c943fb818b9d8ae7fc33e5",
"00dfb3c696328c76424519a7befe8e0f6c76f947b52767916d24823f735baf2e", "461b799b4d9ceea8d580dcb76d11150d535e1639d16003c3fb7e9d1fd13083a8",
"ee03039479e5228fdc551cbde7079d3412ea186a517ccc63e46e9fcce4fe3a6c", "a8cfb543524e7f02b9f045acd543c21c373b4c9b98ac20cec417a6ddb5744e94",
"932b794bf89c6edaf5d0650c7c4bad9242b25626e37ead5aa75ec8c64e09dd4f", "16b10c779ce5cfef59c7710d2e68441ea6facb68e9b5f7d533ae0bb78e28bf57",
"0f77c76743e7396f9910139f4937d837ae54e21038ac5c0b3fd6ef171a28a7e4", "d7e574b7b952f293e80dde905eb509373f3f6cd109a02208b3c1e924080a20ca",
"45666f8c381e3da675563ff8ba23f83bfac30c34abdde6e5c0975ef9fd700cb9", "b24612e454607eb1aba447f816d1a4551ef95fa7247fb7c1f503020a7177f0dd",
"7e208861856da42c8bb46a7567f8121362d9fb2496f131a4aa9017cf366cdfce", "5b646bff6ad1100165037a055601ea02358c0f41050f9dfe3c95dccbd3087be0",
"746d1dccfed2f0ff1e13c51e2d50d5324375fbd5bf7ca82a8931828d801d43ab", "cb98110d4a6bb97d22feadbc6c0d8930c5f8fc508b2fc5b35328d26b88db19ae",
"60b626a033b55f27d7676c4095eababc7a2c7ede2624b472e97f64f96b8cfc0e", "e5b52bc927468df71893eb8197ef820cf76cb0aaf6e8e4fe93ad62d803983104",
"056541ae5da9961be2b0a5e895e5c5ba153cbb62dd561a427bad0ffd41923199", "f8fef05a3fa5c9f3eba41638b247b711a99f960fe73aa2f90136aeb20329b888"];
//begin rct new functions
//creates a Pedersen commitment from an amount (in scalar form) and a mask
//C = bG + aH where b = mask, a = amount
function commit(amount, mask){
if (!valid_hex(mask) || mask.length !== 64 || !valid_hex(amount) || amount.length !== 64){
throw "invalid amount or mask!";
}
var C = this.ge_double_scalarmult_base_vartime(amount, H, mask);
return C;
}
function zeroCommit(amount){
if (!valid_hex(amount) || amount.length !== 64){
throw "invalid amount!";
}
var C = this.ge_double_scalarmult_base_vartime(amount, H, I);
return C;
}
this.decode_rct_ecdh = function(ecdh, key) {
var first = this.hash_to_scalar(key);
var second = this.hash_to_scalar(first);
return {
"mask": this.sc_sub(ecdh.mask, first),
"amount": this.sc_sub(ecdh.amount, second)
};
};
this.encode_rct_ecdh = function(ecdh, key) {
var first = this.hash_to_scalar(key);
var second = this.hash_to_scalar(first);
return {
"mask": this.sc_add(ecdh.mask, first),
"amount": this.sc_add(ecdh.amount, second)
};
};
//switch byte order for hex string
function swapEndian(hex){
if (hex.length % 2 !== 0){return "length must be a multiple of 2!";}
var data = "";
for (var i=1; i <= hex.length / 2; i++){
data += hex.substr(0 - 2 * i, 2);
}
return data;
}
//switch byte order charwise
function swapEndianC(string){
var data = "";
for (var i=1; i <= string.length; i++){
data += string.substr(0 - i, 1);
}
return data;
}
//for most uses you'll also want to swapEndian after conversion
//mainly to convert integer "scalars" to usable hexadecimal strings
function d2h(integer){
if (typeof integer !== "string" && integer.toString().length > 15){throw "integer should be entered as a string for precision";}
var padding = "";
for (i = 0; i < 63; i++){
padding += "0";
}
return (padding + JSBigInt(integer).toString(16).toLowerCase()).slice(-64);
}
//integer (string) to scalar
function d2s(integer){
return swapEndian(d2h(integer));
}
//scalar to integer (string)
function s2d(scalar){
return JSBigInt.parse(swapEndian(scalar), 16).toString();
}
//convert integer string to 64bit "binary" little-endian string
function d2b(integer){
if (typeof integer !== "string" && integer.toString().length > 15){throw "integer should be entered as a string for precision";}
var padding = "";
for (i = 0; i < 63; i++){
padding += "0";
}
var a = new JSBigInt(integer);
if (a.toString(2).length > 64){throw "amount overflows uint64!";}
return swapEndianC((padding + a.toString(2)).slice(-64));
}
//convert integer string to 64bit base 4 little-endian string
function d2b4(integer){
if (typeof integer !== "string" && integer.toString().length > 15){throw "integer should be entered as a string for precision";}
var padding = "";
for (i = 0; i < 31; i++){
padding += "0";
}
var a = new JSBigInt(integer);
if (a.toString(2).length > 64){throw "amount overflows uint64!";}
return swapEndianC((padding + a.toString(4)).slice(-32));
}
//end rct new functions
this.valid_hex = function(hex) {
var exp = new RegExp("[0-9a-fA-F]{" + hex.length + "}");
return exp.test(hex);
};
//simple exclusive or function for two hex inputs
this.hex_xor = function(hex1, hex2) {
if (!hex1 || !hex2 || hex1.length !== hex2.length || hex1.length % 2 !== 0 || hex2.length % 2 !== 0){throw "Hex string(s) is/are invalid!";}
var bin1 = hextobin(hex1);
var bin2 = hextobin(hex2);
var xor = new Uint8Array(bin1.length);
for (i = 0; i < xor.length; i++){
xor[i] = bin1[i] ^ bin2[i];
}
return bintohex(xor);
};
function hextobin(hex) {
if (hex.length % 2 !== 0) throw "Hex string has invalid length!";
var res = new Uint8Array(hex.length / 2);
for (var i = 0; i < hex.length / 2; ++i) {
res[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);
}
return res;
}
function bintohex(bin) {
var out = [];
for (var i = 0; i < bin.length; ++i) {
out.push(("0" + bin[i].toString(16)).slice(-2));
}
return out.join("");
}
// Generate a 256-bit crypto random
this.rand_32 = function() {
return mn_random(256);
};
// Generate a 128-bit crypto random
this.rand_16 = function() {
return mn_random(128);
};
// Generate a 64-bit crypto random
this.rand_8 = function() {
return mn_random(64);
};
this.encode_varint = function(i) {
i = new JSBigInt(i);
var out = '';
// While i >= b10000000
while (i.compare(0x80) >= 0) {
// out.append i & b01111111 | b10000000
out += ("0" + ((i.lowVal() & 0x7f) | 0x80).toString(16)).slice(-2);
i = i.divide(new JSBigInt(2).pow(7));
}
out += ("0" + i.toJSValue().toString(16)).slice(-2);
return out;
};
this.sc_reduce = function(hex) {
var input = hextobin(hex);
if (input.length !== 64) {
throw "sc_reduce: Invalid hextobin(hex) input length";
}
var mem = Module._malloc(64);
Module.HEAPU8.set(input, mem);
Module.ccall('sc_reduce', 'void', ['number'], [mem]);
var output = Module.HEAPU8.subarray(mem, mem + 64);
Module._free(mem);
return bintohex(output);
};
this.sc_reduce32 = function(hex) {
var input = hextobin(hex);
if (input.length !== 32) {
throw "sc_reduce32: Invalid hextobin(hex) input length";
}
var mem = Module._malloc(32);
Module.HEAPU8.set(input, mem);
Module.ccall('sc_reduce32', 'void', ['number'], [mem]);
var output = Module.HEAPU8.subarray(mem, mem + 32);
Module._free(mem);
return bintohex(output);
};
this.cn_fast_hash = function(input, inlen) {
/*if (inlen === undefined || !inlen) {
inlen = Math.floor(input.length / 2);
}*/
if (input.length % 2 !== 0 || !this.valid_hex(input)) {
throw "cn_fast_hash: Input invalid";
}
//update to use new keccak impl (approx 45x faster)
//var state = this.keccak(input, inlen, HASH_STATE_BYTES);
//return state.substr(0, HASH_SIZE * 2);
return keccak_256(hextobin(input));
};
//many functions below are commented out now, and duplicated with the faster nacl impl --luigi1111
// to be removed completely later
/*this.sec_key_to_pub = function(sec) {
var input = hextobin(sec);
if (input.length !== 32) {
throw "Invalid input length";
}
var input_mem = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(input, input_mem);
var ge_p3 = Module._malloc(STRUCT_SIZES.GE_P3);
var out_mem = Module._malloc(KEY_SIZE);
Module.ccall('ge_scalarmult_base', 'void', ['number', 'number'], [ge_p3, input_mem]);
Module.ccall('ge_p3_tobytes', 'void', ['number', 'number'], [out_mem, ge_p3]);
var output = Module.HEAPU8.subarray(out_mem, out_mem + KEY_SIZE);
Module._free(ge_p3);
Module._free(input_mem);
Module._free(out_mem);
return bintohex(output);
};*/
this.sec_key_to_pub = function(sec) {
if (sec.length !== 64) {
throw "sec_key_to_pub: Invalid sec length";
}
return bintohex(nacl.ll.ge_scalarmult_base(hextobin(sec)));
};
//alias
this.ge_scalarmult_base = function(sec) {
return this.sec_key_to_pub(sec);
};
//accepts arbitrary point, rather than G
/*this.ge_scalarmult = function(pub, sec) {
if (pub.length !== 64 || sec.length !== 64) {
throw "Invalid input length";
}
var pub_b = hextobin(pub);
var sec_b = hextobin(sec);
var pub_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(pub_b, pub_m);
var sec_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(sec_b, sec_m);
var ge_p3_m = Module._malloc(STRUCT_SIZES.GE_P3);
var ge_p2_m = Module._malloc(STRUCT_SIZES.GE_P2);
if (Module.ccall("ge_frombytes_vartime", "bool", ["number", "number"], [ge_p3_m, pub_m]) !== 0) {
throw "ge_frombytes_vartime returned non-zero error code";
}
Module.ccall("ge_scalarmult", "void", ["number", "number", "number"], [ge_p2_m, sec_m, ge_p3_m]);
var derivation_m = Module._malloc(KEY_SIZE);
Module.ccall("ge_tobytes", "void", ["number", "number"], [derivation_m, ge_p2_m]);
var res = Module.HEAPU8.subarray(derivation_m, derivation_m + KEY_SIZE);
Module._free(pub_m);
Module._free(sec_m);
Module._free(ge_p3_m);
Module._free(ge_p2_m);
Module._free(derivation_m);
return bintohex(res);
};*/
this.ge_scalarmult = function(pub, sec) {
if (pub.length !== 64 || sec.length !== 64) {
throw "ge_scalarmult: Invalid pub or sec input lengths";
}
return bintohex(nacl.ll.ge_scalarmult(hextobin(pub), hextobin(sec)));
};
this.pubkeys_to_string = function(spend, view) {
var prefix = this.encode_varint(CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX);
var data = prefix + spend + view;
var checksum = this.cn_fast_hash(data);
return cnBase58.encode(data + checksum.slice(0, ADDRESS_CHECKSUM_SIZE * 2));
};
this.get_account_integrated_address = function(address, payment_id8) {
var decoded_address = decode_address(address);
var prefix = this.encode_varint(CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX);
var data = prefix + decoded_address.spend + decoded_address.view + payment_id8;
var checksum = this.cn_fast_hash(data);
return cnBase58.encode(data + checksum.slice(0, ADDRESS_CHECKSUM_SIZE * 2));
};
this.decrypt_payment_id = function(payment_id8, tx_public_key, acc_prv_view_key) {
if (payment_id8.length !== 16) throw "decrypt_payment_id: Invalid payment_id8 length!";
var key_derivation = this.generate_key_derivation(tx_public_key, acc_prv_view_key);
var pid_key = this.cn_fast_hash(key_derivation + ENCRYPTED_PAYMENT_ID_TAIL.toString(16)).slice(0, INTEGRATED_ID_SIZE * 2);
var decrypted_payment_id = this.hex_xor(payment_id8, pid_key);
return decrypted_payment_id;
}
// Generate keypair from seed
this.generate_keys_old = function(seed) {
if (seed.length !== 64) throw "Invalid input length!";
var sec = this.sc_reduce32(seed);
var pub = this.sec_key_to_pub(sec);
return {
'sec': sec,
'pub': pub
};
};
// Generate keypair from seed 2
// as in simplewallet
this.generate_keys = function(seed) {
if (seed.length !== 64) throw "generate_keys: Invalid seed input length!";
var sec = this.sc_reduce32(seed);
var pub = this.sec_key_to_pub(sec);
return {
'sec': sec,
'pub': pub
};
};
this.random_keypair = function() {
return this.generate_keys(this.rand_32());
};
// Random 32-byte ec scalar
this.random_scalar = function() {
//var rand = this.sc_reduce(mn_random(64 * 8));
//return rand.slice(0, STRUCT_SIZES.EC_SCALAR * 2);
return this.sc_reduce32(this.rand_32());
};
/* no longer used
this.keccak = function(hex, inlen, outlen) {
var input = hextobin(hex);
if (input.length !== inlen) {
throw "Invalid input length";
}
if (outlen <= 0) {
throw "Invalid output length";
}
var input_mem = Module._malloc(inlen);
Module.HEAPU8.set(input, input_mem);
var out_mem = Module._malloc(outlen);
Module._keccak(input_mem, inlen | 0, out_mem, outlen | 0);
var output = Module.HEAPU8.subarray(out_mem, out_mem + outlen);
Module._free(input_mem);
Module._free(out_mem);
return bintohex(output);
};*/
this.create_address = function(seed) {
var keys = {};
var first;
if (seed.length !== 64) {
first = this.cn_fast_hash(seed);
} else {
first = seed; //only input reduced seeds or this will not give you the result you want
}
keys.spend = this.generate_keys(first);
if (seed.length !== 64) {
var second = this.cn_fast_hash(first);
} else {
var second = this.cn_fast_hash(keys.spend.sec);
}
keys.view = this.generate_keys(second);
keys.public_addr = this.pubkeys_to_string(keys.spend.pub, keys.view.pub);
return keys;
};
this.create_addr_prefix = function(seed) {
var first;
if (seed.length !== 64) {
first = this.cn_fast_hash(seed);
} else {
first = seed;
}
var spend = this.generate_keys(first);
var prefix = this.encode_varint(CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX);
return cnBase58.encode(prefix + spend.pub).slice(0, 44);
};
this.is_subaddress = function(address) {
var dec = cnBase58.decode(address);
var expectedPrefixSub = this.encode_varint(CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX);
var prefix = dec.slice(0, expectedPrefixSub.length);
return (prefix === expectedPrefixSub);
}
this.decode_address = function(address) {
var dec = cnBase58.decode(address);
var expectedPrefix = this.encode_varint(CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX);
var expectedPrefixInt = this.encode_varint(CRYPTONOTE_PUBLIC_INTEGRATED_ADDRESS_BASE58_PREFIX);
var expectedPrefixSub = this.encode_varint(CRYPTONOTE_PUBLIC_SUBADDRESS_BASE58_PREFIX);
var prefix = dec.slice(0, expectedPrefix.length);
if (prefix !== expectedPrefix && prefix !== expectedPrefixInt && prefix !== expectedPrefixSub) {
throw "Invalid address prefix";
}
dec = dec.slice(expectedPrefix.length);
var spend = dec.slice(0, 64);
var view = dec.slice(64, 128);
if (prefix === expectedPrefixInt){
var intPaymentId = dec.slice(128, 128 + (INTEGRATED_ID_SIZE * 2));
var checksum = dec.slice(128 + (INTEGRATED_ID_SIZE * 2), 128 + (INTEGRATED_ID_SIZE * 2) + (ADDRESS_CHECKSUM_SIZE * 2));
var expectedChecksum = this.cn_fast_hash(prefix + spend + view + intPaymentId).slice(0, ADDRESS_CHECKSUM_SIZE * 2);
} else if (prefix === expectedPrefix) {
var checksum = dec.slice(128, 128 + (ADDRESS_CHECKSUM_SIZE * 2));
var expectedChecksum = this.cn_fast_hash(prefix + spend + view).slice(0, ADDRESS_CHECKSUM_SIZE * 2);
} else {
// if its not regular address, nor integrated, than it must be subaddress
var checksum = dec.slice(128, 128 + (ADDRESS_CHECKSUM_SIZE * 2));
var expectedChecksum = this.cn_fast_hash(prefix + spend + view).slice(0, ADDRESS_CHECKSUM_SIZE * 2);
}
if (checksum !== expectedChecksum) {
throw "Invalid checksum";
}
if (intPaymentId){
return {
spend: spend,
view: view,
intPaymentId: intPaymentId
};
} else {
return {
spend: spend,
view: view
};
}
};
this.valid_keys = function(view_pub, view_sec, spend_pub, spend_sec) {
var expected_view_pub = this.sec_key_to_pub(view_sec);
var expected_spend_pub = this.sec_key_to_pub(spend_sec);
return (expected_spend_pub === spend_pub) && (expected_view_pub === view_pub);
};
this.hash_to_scalar = function(buf) {
var hash = this.cn_fast_hash(buf);
var scalar = this.sc_reduce32(hash);
return scalar;
};
/*this.generate_key_derivation = function(pub, sec) {
if (pub.length !== 64 || sec.length !== 64) {
throw "Invalid input length";
}
var pub_b = hextobin(pub);
var sec_b = hextobin(sec);
var pub_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(pub_b, pub_m);
var sec_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(sec_b, sec_m);
var ge_p3_m = Module._malloc(STRUCT_SIZES.GE_P3);
var ge_p2_m = Module._malloc(STRUCT_SIZES.GE_P2);
var ge_p1p1_m = Module._malloc(STRUCT_SIZES.GE_P1P1);
if (Module.ccall("ge_frombytes_vartime", "bool", ["number", "number"], [ge_p3_m, pub_m]) !== 0) {
throw "ge_frombytes_vartime returned non-zero error code";
}
Module.ccall("ge_scalarmult", "void", ["number", "number", "number"], [ge_p2_m, sec_m, ge_p3_m]);
Module.ccall("ge_mul8", "void", ["number", "number"], [ge_p1p1_m, ge_p2_m]);
Module.ccall("ge_p1p1_to_p2", "void", ["number", "number"], [ge_p2_m, ge_p1p1_m]);
var derivation_m = Module._malloc(KEY_SIZE);
Module.ccall("ge_tobytes", "void", ["number", "number"], [derivation_m, ge_p2_m]);
var res = Module.HEAPU8.subarray(derivation_m, derivation_m + KEY_SIZE);
Module._free(pub_m);
Module._free(sec_m);
Module._free(ge_p3_m);
Module._free(ge_p2_m);
Module._free(ge_p1p1_m);
Module._free(derivation_m);
return bintohex(res);
};*/
this.generate_key_derivation = function(pub, sec) {
if (pub.length !== 64 || sec.length !== 64) {
throw "generate_key_derivation: Invalid pub or sec keys lengths";
}
var P = this.ge_scalarmult(pub, sec);
return this.ge_scalarmult(P, d2s(8)); //mul8 to ensure group
};
this.derivation_to_scalar = function(derivation, output_index) {
var buf = "";
if (derivation.length !== (STRUCT_SIZES.EC_POINT * 2)) {
throw "derivation_to_scalar: Invalid derivation length!";
}
buf += derivation;
var enc = encode_varint(output_index);
if (enc.length > 10 * 2) {
throw "output_index didn't fit in 64-bit varint";
}
buf += enc;
return this.hash_to_scalar(buf);
};
this.derive_secret_key = function(derivation, out_index, sec) {
if (derivation.length !== 64 || sec.length !== 64) {
throw "derive_secret_key: Invalid derivation or sec input length!";
}
var scalar_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var scalar_b = hextobin(this.derivation_to_scalar(derivation, out_index));
Module.HEAPU8.set(scalar_b, scalar_m);
var base_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(sec), base_m);
var derived_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
Module.ccall("sc_add", "void", ["number", "number", "number"], [derived_m, base_m, scalar_m]);
var res = Module.HEAPU8.subarray(derived_m, derived_m + STRUCT_SIZES.EC_SCALAR);
Module._free(scalar_m);
Module._free(base_m);
Module._free(derived_m);
return bintohex(res);
};
/*this.derive_public_key = function(derivation, out_index, pub) {
if (derivation.length !== 64 || pub.length !== 64) {
throw "Invalid input length!";
}
var derivation_m = Module._malloc(KEY_SIZE);
var derivation_b = hextobin(derivation);
Module.HEAPU8.set(derivation_b, derivation_m);
var base_m = Module._malloc(KEY_SIZE);
var base_b = hextobin(pub);
Module.HEAPU8.set(base_b, base_m);
var point1_m = Module._malloc(STRUCT_SIZES.GE_P3);
var point2_m = Module._malloc(STRUCT_SIZES.GE_P3);
var point3_m = Module._malloc(STRUCT_SIZES.GE_CACHED);
var point4_m = Module._malloc(STRUCT_SIZES.GE_P1P1);
var point5_m = Module._malloc(STRUCT_SIZES.GE_P2);
var derived_key_m = Module._malloc(KEY_SIZE);
if (Module.ccall("ge_frombytes_vartime", "bool", ["number", "number"], [point1_m, base_m]) !== 0) {
throw "ge_frombytes_vartime returned non-zero error code";
}
var scalar_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var scalar_b = hextobin(this.derivation_to_scalar(bintohex(Module.HEAPU8.subarray(derivation_m, derivation_m + STRUCT_SIZES.EC_POINT)), out_index));
Module.HEAPU8.set(scalar_b, scalar_m);
Module.ccall("ge_scalarmult_base", "void", ["number", "number"], [point2_m, scalar_m]);
Module.ccall("ge_p3_to_cached", "void", ["number", "number"], [point3_m, point2_m]);
Module.ccall("ge_add", "void", ["number", "number", "number"], [point4_m, point1_m, point3_m]);
Module.ccall("ge_p1p1_to_p2", "void", ["number", "number"], [point5_m, point4_m]);
Module.ccall("ge_tobytes", "void", ["number", "number"], [derived_key_m, point5_m]);
var res = Module.HEAPU8.subarray(derived_key_m, derived_key_m + KEY_SIZE);
Module._free(derivation_m);
Module._free(base_m);
Module._free(scalar_m);
Module._free(point1_m);
Module._free(point2_m);
Module._free(point3_m);
Module._free(point4_m);
Module._free(point5_m);
Module._free(derived_key_m);
return bintohex(res);
};*/
this.derive_public_key = function(derivation, out_index, pub) {
if (derivation.length !== 64 || pub.length !== 64) {
throw "derive_public_key: Invalid derivation or pub key input lengths!";
}
var s = this.derivation_to_scalar(derivation, out_index);
return bintohex(nacl.ll.ge_add(hextobin(pub), hextobin(this.ge_scalarmult_base(s))));
};
this.hash_to_ec = function(key) {
if (key.length !== (KEY_SIZE * 2)) {
throw "hash_to_ec: Invalid key input length";
}
var h_m = Module._malloc(HASH_SIZE);
var point_m = Module._malloc(STRUCT_SIZES.GE_P2);
var point2_m = Module._malloc(STRUCT_SIZES.GE_P1P1);
var res_m = Module._malloc(STRUCT_SIZES.GE_P3);
var hash = hextobin(this.cn_fast_hash(key, KEY_SIZE));
Module.HEAPU8.set(hash, h_m);
Module.ccall("ge_fromfe_frombytes_vartime", "void", ["number", "number"], [point_m, h_m]);
Module.ccall("ge_mul8", "void", ["number", "number"], [point2_m, point_m]);
Module.ccall("ge_p1p1_to_p3", "void", ["number", "number"], [res_m, point2_m]);
var res = Module.HEAPU8.subarray(res_m, res_m + STRUCT_SIZES.GE_P3);
Module._free(h_m);
Module._free(point_m);
Module._free(point2_m);
Module._free(res_m);
return bintohex(res);
};
//returns a 32 byte point via "ge_p3_tobytes" rather than a 160 byte "p3", otherwise same as above;
this.hash_to_ec_2 = function(key) {
if (key.length !== (KEY_SIZE * 2)) {
throw "hash_to_ec_2: Invalid key input length";
}
var h_m = Module._malloc(HASH_SIZE);
var point_m = Module._malloc(STRUCT_SIZES.GE_P2);
var point2_m = Module._malloc(STRUCT_SIZES.GE_P1P1);
var res_m = Module._malloc(STRUCT_SIZES.GE_P3);
var hash = hextobin(this.cn_fast_hash(key, KEY_SIZE));
var res2_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hash, h_m);
Module.ccall("ge_fromfe_frombytes_vartime", "void", ["number", "number"], [point_m, h_m]);
Module.ccall("ge_mul8", "void", ["number", "number"], [point2_m, point_m]);
Module.ccall("ge_p1p1_to_p3", "void", ["number", "number"], [res_m, point2_m]);
Module.ccall("ge_p3_tobytes", "void", ["number", "number"], [res2_m, res_m]);
var res = Module.HEAPU8.subarray(res2_m, res2_m + KEY_SIZE);
Module._free(h_m);
Module._free(point_m);
Module._free(point2_m);
Module._free(res_m);
Module._free(res2_m);
return bintohex(res);
};
this.generate_key_image_2 = function(pub, sec) {
if (!pub || !sec || pub.length !== 64 || sec.length !== 64) {
throw "generate_key_image_2: Invalid pub or sec keys input length";
}
var pub_m = Module._malloc(KEY_SIZE);
var sec_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(pub), pub_m);
Module.HEAPU8.set(hextobin(sec), sec_m);
if (Module.ccall("sc_check", "number", ["number"], [sec_m]) !== 0) {
throw "sc_check(sec) != 0";
}
var point_m = Module._malloc(STRUCT_SIZES.GE_P3);
var point2_m = Module._malloc(STRUCT_SIZES.GE_P2);
var point_b = hextobin(this.hash_to_ec(pub));
Module.HEAPU8.set(point_b, point_m);
var image_m = Module._malloc(STRUCT_SIZES.KEY_IMAGE);
Module.ccall("ge_scalarmult", "void", ["number", "number", "number"], [point2_m, sec_m, point_m]);
Module.ccall("ge_tobytes", "void", ["number", "number"], [image_m, point2_m]);
var res = Module.HEAPU8.subarray(image_m, image_m + STRUCT_SIZES.KEY_IMAGE);
Module._free(pub_m);
Module._free(sec_m);
Module._free(point_m);
Module._free(point2_m);
Module._free(image_m);
return bintohex(res);
};
this.generate_key_image = function(tx_pub, view_sec, spend_pub, spend_sec, output_index) {
if (tx_pub.length !== 64) {
throw "Invalid tx_pub length";
}
if (view_sec.length !== 64) {
throw "Invalid view_sec length";
}
if (spend_pub.length !== 64) {
throw "Invalid spend_pub length";
}
if (spend_sec.length !== 64) {
throw "Invalid spend_sec length";
}
var recv_derivation = this.generate_key_derivation(tx_pub, view_sec);
var ephemeral_pub = this.derive_public_key(recv_derivation, output_index, spend_pub);
var ephemeral_sec = this.derive_secret_key(recv_derivation, output_index, spend_sec);
var k_image = this.generate_key_image_2(ephemeral_pub, ephemeral_sec);
return {
ephemeral_pub: ephemeral_pub,
key_image: k_image
};
};
this.generate_key_image_helper_rct = function(keys, tx_pub_key, out_index, enc_mask) {
var recv_derivation = this.generate_key_derivation(tx_pub_key, keys.view.sec);
if (!recv_derivation) throw "Failed to generate key image";
var mask;
if (enc_mask === I)
{
// this is for ringct coinbase txs (rct type 0). they are ringct tx that have identity mask
mask = enc_mask; // enc_mask is idenity mask returned by backend.
}
else
{
// for other ringct types or for non-ringct txs to this.
mask = enc_mask ? sc_sub(enc_mask, hash_to_scalar(derivation_to_scalar(recv_derivation, out_index))) : I; //decode mask, or d2s(1) if no mask
}
var ephemeral_pub = this.derive_public_key(recv_derivation, out_index, keys.spend.pub);
if (!ephemeral_pub) throw "Failed to generate key image";
var ephemeral_sec = this.derive_secret_key(recv_derivation, out_index, keys.spend.sec);
var image = this.generate_key_image_2(ephemeral_pub, ephemeral_sec);
return {
in_ephemeral: {
pub: ephemeral_pub,
sec: ephemeral_sec,
mask: mask
},
image: image
};
};
//curve and scalar functions; split out to make their host functions cleaner and more readable
//inverts X coordinate -- this seems correct ^_^ -luigi1111
this.ge_neg = function(point) {
if (point.length !== 64){
throw "expected 64 char hex string";
}
return point.slice(0,62) + ((parseInt(point.slice(62,63), 16) + 8) % 16).toString(16) + point.slice(63,64);
};
//adds two points together, order does not matter
/*this.ge_add2 = function(point1, point2) {
var point1_m = Module._malloc(KEY_SIZE);
var point2_m = Module._malloc(KEY_SIZE);
var point1_m2 = Module._malloc(STRUCT_SIZES.GE_P3);
var point2_m2 = Module._malloc(STRUCT_SIZES.GE_P3);
Module.HEAPU8.set(hextobin(point1), point1_m);
Module.HEAPU8.set(hextobin(point2), point2_m);
if (Module.ccall("ge_frombytes_vartime", "bool", ["number", "number"], [point1_m2, point1_m]) !== 0) {
throw "ge_frombytes_vartime returned non-zero error code";
}
if (Module.ccall("ge_frombytes_vartime", "bool", ["number", "number"], [point2_m2, point2_m]) !== 0) {
throw "ge_frombytes_vartime returned non-zero error code";
}
var sum_m = Module._malloc(KEY_SIZE);
var p2_m = Module._malloc(STRUCT_SIZES.GE_P2);
var p1_m = Module._malloc(STRUCT_SIZES.GE_P1P1);
var p3_m = Module._malloc(STRUCT_SIZES.GE_CACHED);
Module.ccall("ge_p3_to_cached", "void", ["number", "number"], [p3_m, point2_m2]);
Module.ccall("ge_add", "void", ["number", "number", "number"], [p1_m, point1_m2, p3_m]);
Module.ccall("ge_p1p1_to_p2", "void", ["number", "number"], [p2_m, p1_m]);
Module.ccall("ge_tobytes", "void", ["number", "number"], [sum_m, p2_m]);
var res = Module.HEAPU8.subarray(sum_m, sum_m + KEY_SIZE);
Module._free(point1_m);
Module._free(point1_m2);
Module._free(point2_m);
Module._free(point2_m2);
Module._free(p2_m);
Module._free(p1_m);
Module._free(sum_m);
Module._free(p3_m);
return bintohex(res);
};*/
this.ge_add = function(p1, p2) {
if (p1.length !== 64 || p2.length !== 64) {
throw "ge_add: Invalid p1 or p2 input lengths!";
}
return bintohex(nacl.ll.ge_add(hextobin(p1), hextobin(p2)));
};
//order matters
this.ge_sub = function(point1, point2) {
point2n = ge_neg(point2);
return ge_add(point1, point2n);
};
//adds two scalars together
this.sc_add = function(scalar1, scalar2) {
if (scalar1.length !== 64 || scalar2.length !== 64) {
throw "sc_add: Invalid scalar1 or scalar2 input length!";
}
var scalar1_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var scalar2_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
Module.HEAPU8.set(hextobin(scalar1), scalar1_m);
Module.HEAPU8.set(hextobin(scalar2), scalar2_m);
var derived_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
Module.ccall("sc_add", "void", ["number", "number", "number"], [derived_m, scalar1_m, scalar2_m]);
var res = Module.HEAPU8.subarray(derived_m, derived_m + STRUCT_SIZES.EC_SCALAR);
Module._free(scalar1_m);
Module._free(scalar2_m);
Module._free(derived_m);
return bintohex(res);
};
//subtracts one scalar from another
this.sc_sub = function(scalar1, scalar2) {
if (scalar1.length !== 64 || scalar2.length !== 64) {
throw "sc_sub: Invalid scalar1 or scalar2 input lengths!";
}
var scalar1_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var scalar2_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
Module.HEAPU8.set(hextobin(scalar1), scalar1_m);
Module.HEAPU8.set(hextobin(scalar2), scalar2_m);
var derived_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
Module.ccall("sc_sub", "void", ["number", "number", "number"], [derived_m, scalar1_m, scalar2_m]);
var res = Module.HEAPU8.subarray(derived_m, derived_m + STRUCT_SIZES.EC_SCALAR);
Module._free(scalar1_m);
Module._free(scalar2_m);
Module._free(derived_m);
return bintohex(res);
};
//fun mul function
this.sc_mul = function(scalar1, scalar2) {
if (scalar1.length !== 64 || scalar2.length !== 64) {
throw "sc_mul: Invalid scalar1 or scalar2 input lengths!";
}
return d2s(JSBigInt(s2d(scalar1)).multiply(JSBigInt(s2d(scalar2))).remainder(l).toString());
};
//res = c - (ab) mod l; argument names copied from the signature implementation
this.sc_mulsub = function(sigc, sec, k) {
if (k.length !== KEY_SIZE * 2 || sigc.length !== KEY_SIZE * 2 || sec.length !== KEY_SIZE * 2 || !this.valid_hex(k) || !this.valid_hex(sigc) || !this.valid_hex(sec)) {
throw "bad scalar";
}
var sec_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(sec), sec_m);
var sigc_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(sigc), sigc_m);
var k_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(k), k_m);
var res_m = Module._malloc(KEY_SIZE);
Module.ccall("sc_mulsub", "void", ["number", "number", "number", "number"], [res_m, sigc_m, sec_m, k_m]);
res = Module.HEAPU8.subarray(res_m, res_m + KEY_SIZE);
Module._free(k_m);
Module._free(sec_m);
Module._free(sigc_m);
Module._free(res_m);
return bintohex(res);
};
//res = aB + cG; argument names copied from the signature implementation
/*this.ge_double_scalarmult_base_vartime = function(sigc, pub, sigr) {
var pub_m = Module._malloc(KEY_SIZE);
var pub2_m = Module._malloc(STRUCT_SIZES.GE_P3);
Module.HEAPU8.set(hextobin(pub), pub_m);
if (Module.ccall("ge_frombytes_vartime", "void", ["number", "number"], [pub2_m, pub_m]) !== 0) {
throw "Failed to call ge_frombytes_vartime";
}
var sigc_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(sigc), sigc_m);
var sigr_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(sigr), sigr_m);
if (Module.ccall("sc_check", "number", ["number"], [sigc_m]) !== 0 || Module.ccall("sc_check", "number", ["number"], [sigr_m]) !== 0) {
throw "bad scalar(s)";
}
var tmp_m = Module._malloc(STRUCT_SIZES.GE_P2);
var res_m = Module._malloc(KEY_SIZE);
Module.ccall("ge_double_scalarmult_base_vartime", "void", ["number", "number", "number", "number"], [tmp_m, sigc_m, pub2_m, sigr_m]);
Module.ccall("ge_tobytes", "void", ["number", "number"], [res_m, tmp_m]);
var res = Module. HEAPU8.subarray(res_m, res_m + KEY_SIZE);
Module._free(pub_m);
Module._free(pub2_m);
Module._free(sigc_m);
Module._free(sigr_m);
Module._free(tmp_m);
Module._free(res_m);
return bintohex(res);
};*/
this.ge_double_scalarmult_base_vartime = function(c, P, r) {
if (c.length !== 64 || P.length !== 64 || r.length !== 64) {
throw "ge_double_scalarmult_base_vartime: Invalid c, P or r input lengths!";
}
return bintohex(nacl.ll.ge_double_scalarmult_base_vartime(hextobin(c), hextobin(P), hextobin(r)));
};
//res = a * Hp(B) + c*D
//res = sigr * Hp(pub) + sigc * k_image; argument names also copied from the signature implementation; note precomp AND hash_to_ec are done internally!!
/*this.ge_double_scalarmult_postcomp_vartime = function(sigr, pub, sigc, k_image) {
var image_m = Module._malloc(STRUCT_SIZES.KEY_IMAGE);
Module.HEAPU8.set(hextobin(k_image), image_m);
var image_unp_m = Module._malloc(STRUCT_SIZES.GE_P3);
var image_pre_m = Module._malloc(STRUCT_SIZES.GE_DSMP);
var tmp3_m = Module._malloc(STRUCT_SIZES.GE_P3);
var sigr_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var sigc_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var tmp2_m = Module._malloc(STRUCT_SIZES.GE_P2);
var res_m = Module._malloc(STRUCT_SIZES.EC_POINT);
if (Module.ccall("ge_frombytes_vartime", "void", ["number", "number"], [image_unp_m, image_m]) !== 0) {
throw "Failed to call ge_frombytes_vartime";
}
Module.ccall("ge_dsm_precomp", "void", ["number", "number"], [image_pre_m, image_unp_m]);
var ec = this.hash_to_ec(pub);
Module.HEAPU8.set(hextobin(ec), tmp3_m);
Module.HEAPU8.set(hextobin(sigc), sigc_m);
Module.HEAPU8.set(hextobin(sigr), sigr_m);
Module.ccall("ge_double_scalarmult_precomp_vartime", "void", ["number", "number", "number", "number", "number"], [tmp2_m, sigr_m, tmp3_m, sigc_m, image_pre_m]);
Module.ccall("ge_tobytes", "void", ["number", "number"], [res_m, tmp2_m]);
var res = Module. HEAPU8.subarray(res_m, res_m + STRUCT_SIZES.EC_POINT);
Module._free(image_m);
Module._free(image_unp_m);
Module._free(image_pre_m);
Module._free(tmp3_m);
Module._free(sigr_m);
Module._free(sigc_m);
Module._free(tmp2_m);
Module._free(res_m);
return bintohex(res);
};*/
this.ge_double_scalarmult_postcomp_vartime = function(r, P, c, I) {
if (c.length !== 64 || P.length !== 64 || r.length !== 64 || I.length !== 64) {
throw "ge_double_scalarmult_postcomp_vartime: Invalid r, p, c or I input lengths!";
}
var Pb = this.hash_to_ec_2(P);
return bintohex(nacl.ll.ge_double_scalarmult_postcomp_vartime(hextobin(r), hextobin(Pb), hextobin(c), hextobin(I)));
};
//begin RCT functions
//xv: vector of secret keys, 1 per ring (nrings)
//pm: matrix of pubkeys, indexed by size first
//iv: vector of indexes, 1 per ring (nrings), can be a string
//size: ring size
//nrings: number of rings
//extensible borromean signatures
this.genBorromean = function(xv, pm, iv, size, nrings){
if (xv.length !== nrings){
throw "wrong xv length " + xv.length;
}
if (pm.length !== size){
throw "wrong pm size " + pm.length;
}
for (var i = 0; i < pm.length; i++){
if (pm[i].length !== nrings){
throw "wrong pm[" + i + "] length " + pm[i].length;
}
}
if (iv.length !== nrings){
throw "wrong iv length " + iv.length;
}
for (var i = 0; i < iv.length; i++){
if (iv[i] >= size){
throw "bad indices value at: " + i + ": " + iv[i];
}
}
//signature struct
var bb = {
s: [],
ee: ""
};
//signature pubkey matrix
var L = [];
//add needed sub vectors (1 per ring size)
for (var i = 0; i < size; i++){
bb.s[i] = [];
L[i] = [];
}
//compute starting at the secret index to the last row
var index;
var alpha = [];
for (var i = 0; i < nrings; i++){
index = parseInt(iv[i]);
alpha[i] = random_scalar();
L[index][i] = ge_scalarmult_base(alpha[i]);
for (var j = index + 1; j < size; j++){
bb.s[j][i] = random_scalar();
var c = hash_to_scalar(L[j-1][i]);
L[j][i] = ge_double_scalarmult_base_vartime(c, pm[j][i], bb.s[j][i]);
}
}
//hash last row to create ee
var ltemp = "";
for (var i = 0; i < nrings; i++){
ltemp += L[size-1][i];
}
bb.ee = hash_to_scalar(ltemp);
//compute the rest from 0 to secret index
for (var i = 0; i < nrings; i++){
var cc = bb.ee
for (var j = 0; j < iv[i]; j++){
bb.s[j][i] = random_scalar();
var LL = ge_double_scalarmult_base_vartime(cc, pm[j][i], bb.s[j][i]);
cc = hash_to_scalar(LL);
}
bb.s[j][i] = sc_mulsub(xv[i], cc, alpha[i]);
}
return bb;
};
//proveRange
//proveRange gives C, and mask such that \sumCi = C
// c.f. http://eprint.iacr.org/2015/1098 section 5.1
// and Ci is a commitment to either 0 or s^i, i=0,...,n
// thus this proves that "amount" is in [0, s^n] (we assume s to be 4) (2 for now with v2 txes)
// mask is a such that C = aG + bH, and b = amount
//commitMaskObj = {C: commit, mask: mask}
this.proveRange = function(commitMaskObj, amount, nrings, enc_seed, exponent){
var size = 2;
var C = I; //identity
var mask = Z; //zero scalar
var indices = d2b(amount); //base 2 for now
var sig = {
Ci: []
//exp: exponent //doesn't exist for now
}
/*payload stuff - ignore for now
seeds = new Array(3);
for (var i = 0; i < seeds.length; i++){
seeds[i] = new Array(1);
}
genSeeds(seeds, enc_seed);
*/
var ai = [];
var PM = [];
for (var i = 0; i < size; i++){
PM[i] = [];
}
var j;
//start at index and fill PM left and right -- PM[0] holds Ci
for (i = 0; i < nrings; i++){
ai[i] = random_scalar();
j = indices[i];
PM[j][i] = ge_scalarmult_base(ai[i]);
while (j > 0){
j--;
PM[j][i] = ge_add(PM[j+1][i], H2[i]); //will need to use i*2 for base 4 (or different object)
}
j = indices[i];
while (j < size - 1){
j++;
PM[j][i] = ge_sub(PM[j-1][i], H2[i]); //will need to use i*2 for base 4 (or different object)
}
mask = sc_add(mask, ai[i]);
}
/*
* some more payload stuff here
*/
//copy commitments to sig and sum them to commitment
for (i = 0; i < nrings; i++){
//if (i < nrings - 1) //for later version
sig.Ci[i] = PM[0][i];
C = ge_add(C, PM[0][i]);
}
/* exponent stuff - ignore for now
if (exponent){
n = JSBigInt(10);
n = n.pow(exponent).toString();
mask = sc_mul(mask, d2s(n)); //new sum
}
*/
sig.bsig = this.genBorromean(ai, PM, indices, size, nrings);
commitMaskObj.C = C;
commitMaskObj.mask = mask;
return sig;
};
function array_hash_to_scalar(array){
var buf = ""
for (var i = 0; i < array.length; i++){
if (typeof array[i] !== "string"){throw "unexpected array element";}
buf += array[i];
}
return hash_to_scalar(buf);
}
// Gen creates a signature which proves that for some column in the keymatrix "pk"
// the signer knows a secret key for each row in that column
// we presently only support matrices of 2 rows (pubkey, commitment)
// this is a simplied MLSAG_Gen function to reflect that
// because we don't want to force same secret column for all inputs
this.MLSAG_Gen = function(message, pk, xx, kimg, index){
var cols = pk.length; //ring size
if (index >= cols){throw "index out of range";}
var rows = pk[0].length; //number of signature rows (always 2)
if (rows !== 2){throw "wrong row count";}
for (var i = 0; i < cols; i++){
if (pk[i].length !== rows){throw "pk is not rectangular";}
}
if (xx.length !== rows){throw "bad xx size";}
var c_old = "";
var alpha = [];
var rv = {
ss: [],
cc: null
};
for (i = 0; i < cols; i++){
rv.ss[i] = [];
}
var toHash = []; //holds 6 elements: message, pubkey, dsRow L, dsRow R, commitment, ndsRow L
toHash[0] = message;
//secret index (pubkey section)
alpha[0] = random_scalar(); //need to save alphas for later
toHash[1] = pk[index][0]; //secret index pubkey
toHash[2] = ge_scalarmult_base(alpha[0]); //dsRow L
toHash[3] = generate_key_image_2(pk[index][0], alpha[0]); //dsRow R (key image check)
//secret index (commitment section)
alpha[1] = random_scalar();
toHash[4] = pk[index][1]; //secret index commitment
toHash[5] = ge_scalarmult_base(alpha[1]); //ndsRow L
c_old = array_hash_to_scalar(toHash);
i = (index + 1) % cols;
if (i === 0){
rv.cc = c_old;
}
while (i != index){
rv.ss[i][0] = random_scalar(); //dsRow ss
rv.ss[i][1] = random_scalar(); //ndsRow ss
//!secret index (pubkey section)
toHash[1] = pk[i][0];
toHash[2] = ge_double_scalarmult_base_vartime(c_old, pk[i][0], rv.ss[i][0]);
toHash[3] = ge_double_scalarmult_postcomp_vartime(rv.ss[i][0], pk[i][0], c_old, kimg);
//!secret index (commitment section)
toHash[4] = pk[i][1];
toHash[5] = ge_double_scalarmult_base_vartime(c_old, pk[i][1], rv.ss[i][1]);
c_old = array_hash_to_scalar(toHash); //hash to get next column c
i = (i + 1) % cols;
if (i === 0){
rv.cc = c_old;
}
}
for (i = 0; i < rows; i++){
rv.ss[index][i] = sc_mulsub(c_old, xx[i], alpha[i]);
}
return rv;
};
//prepares for MLSAG_Gen
this.proveRctMG = function(message, pubs, inSk, kimg, mask, Cout, index){
var cols = pubs.length;
if (cols < 3){throw "cols must be > 2 (mixin)";}
var xx = [];
var PK = [];
//fill pubkey matrix (copy destination, subtract commitments)
for (var i = 0; i < cols; i++){
PK[i] = [];
PK[i][0] = pubs[i].dest;
PK[i][1] = ge_sub(pubs[i].mask, Cout);
}
xx[0] = inSk.x;
xx[1] = sc_sub(inSk.a, mask);
return this.MLSAG_Gen(message, PK, xx, kimg, index);
};
this.get_pre_mlsag_hash = function(rv) {
var hashes = "";
hashes += rv.message;
hashes += this.cn_fast_hash(this.serialize_rct_base(rv));
var buf = serialize_range_proofs(rv);
hashes += this.cn_fast_hash(buf);
return this.cn_fast_hash(hashes);
}
function serialize_range_proofs(rv) {
var buf = "";
for (var i = 0; i < rv.p.rangeSigs.length; i++) {
for (var j = 0; j < rv.p.rangeSigs[i].bsig.s.length; j++) {
for (var l = 0; l < rv.p.rangeSigs[i].bsig.s[j].length; l++) {
buf += rv.p.rangeSigs[i].bsig.s[j][l];
}
}
buf += rv.p.rangeSigs[i].bsig.ee;
for (j = 0; j < rv.p.rangeSigs[i].Ci.length; j++) {
buf += rv.p.rangeSigs[i].Ci[j];
}
}
return buf;
}
//message is normal prefix hash
//inSk is vector of x,a
//kimg is vector of kimg
//destinations is vector of pubkeys (we skip and proxy outAmounts instead)
//inAmounts is vector of strings
//outAmounts is vector of strings
//mixRing is matrix of pubkey, commit (dest, mask)
//amountKeys is vector of scalars
//indices is vector
//txnFee is string
this.genRct = function(message, inSk, kimg, /*destinations, */inAmounts, outAmounts, mixRing, amountKeys, indices, txnFee){
if (outAmounts.length !== amountKeys.length ){throw "different number of amounts/amount_keys";}
for (var i = 0; i < mixRing.length; i++){
if (mixRing[i].length <= indices[i]){throw "bad mixRing/index size";}
}
if (mixRing.length !== inSk.length){throw "mismatched mixRing/inSk";}
if (inAmounts.length !== inSk.length){throw "mismatched inAmounts/inSk";}
if (indices.length !== inSk.length){throw "mismatched indices/inSk";}
rv = {
type: inSk.length === 1 ? RCTTypeFull : RCTTypeSimple,
message: message,
outPk: [],
p: {
rangeSigs: [],
MGs: []
},
ecdhInfo: [],
txnFee: txnFee.toString(),
pseudoOuts: []
};
var sumout = Z;
var cmObj = {
C: null,
mask: null
};
var nrings = 64; //for base 2/current
//compute range proofs, etc
for (i = 0; i < outAmounts.length; i++){
var teststart = new Date().getTime();
rv.p.rangeSigs[i] = this.proveRange(cmObj, outAmounts[i], nrings, 0, 0);
var testfinish = new Date().getTime() - teststart;
console.log("Time take for range proof " + i + ": " + testfinish);
rv.outPk[i] = cmObj.C;
sumout = sc_add(sumout, cmObj.mask);
rv.ecdhInfo[i] = this.encode_rct_ecdh({mask: cmObj.mask, amount: d2s(outAmounts[i])}, amountKeys[i]);
}
//simple
if (rv.type === 2){
var ai = [];
var sumpouts = Z;
//create pseudoOuts
for (i = 0; i < inAmounts.length - 1; i++){
ai[i] = random_scalar();
sumpouts = sc_add(sumpouts, ai[i]);
rv.pseudoOuts[i] = commit(d2s(inAmounts[i]), ai[i]);
}
ai[i] = sc_sub(sumout, sumpouts);
rv.pseudoOuts[i] = commit(d2s(inAmounts[i]), ai[i]);
var full_message = this.get_pre_mlsag_hash(rv);
for (i = 0; i < inAmounts.length; i++){
rv.p.MGs.push(this.proveRctMG(full_message, mixRing[i], inSk[i], kimg[i], ai[i], rv.pseudoOuts[i], indices[i]));
}
} else {
var sumC = I;
//get sum of output commitments to use in MLSAG
for (i = 0; i < rv.outPk.length; i++){
sumC = ge_add(sumC, rv.outPk[i]);
}
sumC = ge_add(sumC, ge_scalarmult(H, d2s(rv.txnFee)));
var full_message = this.get_pre_mlsag_hash(rv);
rv.p.MGs.push(this.proveRctMG(full_message, mixRing[0], inSk[0], kimg[0], sumout, sumC, indices[0]));
}
return rv;
};
//end RCT functions
this.add_pub_key_to_extra = function(extra, pubkey) {
if (pubkey.length !== 64) throw "Invalid pubkey length";
// Append pubkey tag and pubkey
extra += TX_EXTRA_TAGS.PUBKEY + pubkey;
return extra;
};
this.add_nonce_to_extra = function(extra, nonce) {
// Append extra nonce
if ((nonce.length % 2) !== 0) {
throw "Invalid extra nonce";
}
if ((nonce.length / 2) > TX_EXTRA_NONCE_MAX_COUNT) {
throw "Extra nonce must be at most " + TX_EXTRA_NONCE_MAX_COUNT + " bytes";
}
// Add nonce tag
extra += TX_EXTRA_TAGS.NONCE;
// Encode length of nonce
extra += ('0' + (nonce.length / 2).toString(16)).slice(-2);
// Write nonce
extra += nonce;
return extra;
};
this.get_payment_id_nonce = function(payment_id, pid_encrypt) {
if (payment_id.length !== 64 && payment_id.length !== 16) {
throw "Invalid payment id";
}
var res = '';
if (pid_encrypt) {
res += TX_EXTRA_NONCE_TAGS.ENCRYPTED_PAYMENT_ID;
} else {
res += TX_EXTRA_NONCE_TAGS.PAYMENT_ID;
}
res += payment_id;
return res;
};
this.abs_to_rel_offsets = function(offsets) {
if (offsets.length === 0) return offsets;
for (var i = offsets.length - 1; i >= 1; --i) {
offsets[i] = new JSBigInt(offsets[i]).subtract(offsets[i - 1]).toString();
}
return offsets;
};
this.get_tx_prefix_hash = function(tx) {
var prefix = this.serialize_tx(tx, true);
return this.cn_fast_hash(prefix);
};
this.get_tx_hash = function(tx) {
if (typeof(tx) === 'string') {
return this.cn_fast_hash(tx);
} else {
return this.cn_fast_hash(this.serialize_tx(tx));
}
};
this.serialize_tx = function(tx, headeronly) {
//tx: {
// version: uint64,
// unlock_time: uint64,
// extra: hex,
// vin: [{amount: uint64, k_image: hex, key_offsets: [uint64,..]},...],
// vout: [{amount: uint64, target: {key: hex}},...],
// signatures: [[s,s,...],...]
//}
if (headeronly === undefined) {
headeronly = false;
}
var buf = "";
buf += this.encode_varint(tx.version);
buf += this.encode_varint(tx.unlock_time);
buf += this.encode_varint(tx.vin.length);
var i, j;
for (i = 0; i < tx.vin.length; i++) {
var vin = tx.vin[i];
switch (vin.type) {
case "input_to_key":
buf += "02";
buf += this.encode_varint(vin.amount);
buf += this.encode_varint(vin.key_offsets.length);
for (j = 0; j < vin.key_offsets.length; j++) {
buf += this.encode_varint(vin.key_offsets[j]);
}
buf += vin.k_image;
break;
default:
throw "Unhandled vin type: " + vin.type;
}
}
buf += this.encode_varint(tx.vout.length);
for (i = 0; i < tx.vout.length; i++) {
var vout = tx.vout[i];
buf += this.encode_varint(vout.amount);
switch (vout.target.type) {
case "txout_to_key":
buf += "02";
buf += vout.target.key;
break;
default:
throw "Unhandled txout target type: " + vout.target.type;
}
}
if (!this.valid_hex(tx.extra)) {
throw "Tx extra has invalid hex";
}
buf += this.encode_varint(tx.extra.length / 2);
buf += tx.extra;
if (!headeronly) {
if (tx.vin.length !== tx.signatures.length) {
throw "Signatures length != vin length";
}
for (i = 0; i < tx.vin.length; i++) {
for (j = 0; j < tx.signatures[i].length; j++) {
buf += tx.signatures[i][j];
}
}
}
return buf;
};
this.serialize_rct_tx_with_hash = function(tx) {
var hashes = "";
var buf = "";
buf += this.serialize_tx(tx, true);
hashes += this.cn_fast_hash(buf);
var buf2 = this.serialize_rct_base(tx.rct_signatures);
hashes += this.cn_fast_hash(buf2);
buf += buf2;
var buf3 = serialize_range_proofs(tx.rct_signatures);
//add MGs
for (var i = 0; i < tx.rct_signatures.p.MGs.length; i++) {
for (var j = 0; j < tx.rct_signatures.p.MGs[i].ss.length; j++) {
buf3 += tx.rct_signatures.p.MGs[i].ss[j][0];
buf3 += tx.rct_signatures.p.MGs[i].ss[j][1];
}
buf3 += tx.rct_signatures.p.MGs[i].cc;
}
hashes += this.cn_fast_hash(buf3);
buf += buf3;
var hash = this.cn_fast_hash(hashes);
return {
raw: buf,
hash: hash,
prvkey: tx.prvkey
};
};
this.serialize_rct_base = function(rv) {
var buf = "";
buf += this.encode_varint(rv.type);
buf += this.encode_varint(rv.txnFee);
if (rv.type === 2) {
for (var i = 0; i < rv.pseudoOuts.length; i++) {
buf += rv.pseudoOuts[i];
}
}
if (rv.ecdhInfo.length !== rv.outPk.length) {
throw "mismatched outPk/ecdhInfo!";
}
for (i = 0; i < rv.ecdhInfo.length; i++) {
buf += rv.ecdhInfo[i].mask;
buf += rv.ecdhInfo[i].amount;
}
for (i = 0; i < rv.outPk.length; i++) {
buf += rv.outPk[i];
}
return buf;
};
this.generate_ring_signature = function(prefix_hash, k_image, keys, sec, real_index) {
if (k_image.length !== STRUCT_SIZES.KEY_IMAGE * 2) {
throw "invalid key image length";
}
if (sec.length !== KEY_SIZE * 2) {
throw "Invalid secret key length";
}
if (prefix_hash.length !== HASH_SIZE * 2 || !this.valid_hex(prefix_hash)) {
throw "Invalid prefix hash";
}
if (real_index >= keys.length || real_index < 0) {
throw "real_index is invalid";
}
var _ge_tobytes = Module.cwrap("ge_tobytes", "void", ["number", "number"]);
var _ge_p3_tobytes = Module.cwrap("ge_p3_tobytes", "void", ["number", "number"]);
var _ge_scalarmult_base = Module.cwrap("ge_scalarmult_base", "void", ["number", "number"]);
var _ge_scalarmult = Module.cwrap("ge_scalarmult", "void", ["number", "number", "number"]);
var _sc_add = Module.cwrap("sc_add", "void", ["number", "number", "number"]);
var _sc_sub = Module.cwrap("sc_sub", "void", ["number", "number", "number"]);
var _sc_mulsub = Module.cwrap("sc_mulsub", "void", ["number", "number", "number", "number"]);
var _sc_0 = Module.cwrap("sc_0", "void", ["number"]);
var _ge_double_scalarmult_base_vartime = Module.cwrap("ge_double_scalarmult_base_vartime", "void", ["number", "number", "number", "number"]);
var _ge_double_scalarmult_precomp_vartime = Module.cwrap("ge_double_scalarmult_precomp_vartime", "void", ["number", "number", "number", "number", "number"]);
var _ge_frombytes_vartime = Module.cwrap("ge_frombytes_vartime", "number", ["number", "number"]);
var _ge_dsm_precomp = Module.cwrap("ge_dsm_precomp", "void", ["number", "number"]);
var buf_size = STRUCT_SIZES.EC_POINT * 2 * keys.length;
var buf_m = Module._malloc(buf_size);
var sig_size = STRUCT_SIZES.SIGNATURE * keys.length;
var sig_m = Module._malloc(sig_size);
// Struct pointer helper functions
function buf_a(i) {
return buf_m + STRUCT_SIZES.EC_POINT * (2 * i);
}
function buf_b(i) {
return buf_m + STRUCT_SIZES.EC_POINT * (2 * i + 1);
}
function sig_c(i) {
return sig_m + STRUCT_SIZES.EC_SCALAR * (2 * i);
}
function sig_r(i) {
return sig_m + STRUCT_SIZES.EC_SCALAR * (2 * i + 1);
}
var image_m = Module._malloc(STRUCT_SIZES.KEY_IMAGE);
Module.HEAPU8.set(hextobin(k_image), image_m);
var i;
var image_unp_m = Module._malloc(STRUCT_SIZES.GE_P3);
var image_pre_m = Module._malloc(STRUCT_SIZES.GE_DSMP);
var sum_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var k_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var h_m = Module._malloc(STRUCT_SIZES.EC_SCALAR);
var tmp2_m = Module._malloc(STRUCT_SIZES.GE_P2);
var tmp3_m = Module._malloc(STRUCT_SIZES.GE_P3);
var pub_m = Module._malloc(KEY_SIZE);
var sec_m = Module._malloc(KEY_SIZE);
Module.HEAPU8.set(hextobin(sec), sec_m);
if (_ge_frombytes_vartime(image_unp_m, image_m) != 0) {
throw "failed to call ge_frombytes_vartime";
}
_ge_dsm_precomp(image_pre_m, image_unp_m);
_sc_0(sum_m);
for (i = 0; i < keys.length; i++) {
if (i === real_index) {
// Real key
var rand = this.random_scalar();
Module.HEAPU8.set(hextobin(rand), k_m);
_ge_scalarmult_base(tmp3_m, k_m);
_ge_p3_tobytes(buf_a(i), tmp3_m);
var ec = this.hash_to_ec(keys[i]);
Module.HEAPU8.set(hextobin(ec), tmp3_m);
_ge_scalarmult(tmp2_m, k_m, tmp3_m);
_ge_tobytes(buf_b(i), tmp2_m);
} else {
Module.HEAPU8.set(hextobin(this.random_scalar()), sig_c(i));
Module.HEAPU8.set(hextobin(this.random_scalar()), sig_r(i));
Module.HEAPU8.set(hextobin(keys[i]), pub_m);
if (Module.ccall("ge_frombytes_vartime", "void", ["number", "number"], [tmp3_m, pub_m]) !== 0) {
throw "Failed to call ge_frombytes_vartime";
}
_ge_double_scalarmult_base_vartime(tmp2_m, sig_c(i), tmp3_m, sig_r(i));
_ge_tobytes(buf_a(i), tmp2_m);
var ec = this.hash_to_ec(keys[i]);
Module.HEAPU8.set(hextobin(ec), tmp3_m);
_ge_double_scalarmult_precomp_vartime(tmp2_m, sig_r(i), tmp3_m, sig_c(i), image_pre_m);
_ge_tobytes(buf_b(i), tmp2_m);
_sc_add(sum_m, sum_m, sig_c(i));
}
}
var buf_bin = Module.HEAPU8.subarray(buf_m, buf_m + buf_size);
var scalar = this.hash_to_scalar(prefix_hash + bintohex(buf_bin));
Module.HEAPU8.set(hextobin(scalar), h_m);
_sc_sub(sig_c(real_index), h_m, sum_m);
_sc_mulsub(sig_r(real_index), sig_c(real_index), sec_m, k_m);
var sig_data = bintohex(Module.HEAPU8.subarray(sig_m, sig_m + sig_size));
var sigs = [];
for (var k = 0; k < keys.length; k++) {
sigs.push(sig_data.slice(STRUCT_SIZES.SIGNATURE * 2 * k, STRUCT_SIZES.SIGNATURE * 2 * (k + 1)));
}
Module._free(image_m);
Module._free(image_unp_m);
Module._free(image_pre_m);
Module._free(sum_m);
Module._free(k_m);
Module._free(h_m);
Module._free(tmp2_m);
Module._free(tmp3_m);
Module._free(buf_m);
Module._free(sig_m);
Module._free(pub_m);
Module._free(sec_m);
return sigs;
};
// reargances array to specific indices.
this.rearrange = function(arr, ind) {
var new_arr = [];
for (j = 0; j < ind.length; j++) {
new_arr.push(arr[ind[j]]);
}
return new_arr;
};
this.construct_tx = function(keys, sources, dsts, fee_amount, payment_id, pid_encrypt, realDestViewKey, unlock_time, rct) {
//we move payment ID stuff here, because we need txkey to encrypt
var txkey = this.random_keypair();
console.log(txkey);
var extra = '';
if (payment_id) {
if (pid_encrypt && payment_id.length !== INTEGRATED_ID_SIZE * 2) {
throw "payment ID must be " + INTEGRATED_ID_SIZE + " bytes to be encrypted!";
}
console.log("Adding payment id: " + payment_id);
if (pid_encrypt) { //get the derivation from our passed viewkey, then hash that + tail to get encryption key
var pid_key = this.cn_fast_hash(this.generate_key_derivation(realDestViewKey, txkey.sec) + ENCRYPTED_PAYMENT_ID_TAIL.toString(16)).slice(0, INTEGRATED_ID_SIZE * 2);
console.log("Txkeys:", txkey, "Payment ID key:", pid_key);
payment_id = this.hex_xor(payment_id, pid_key);
}
var nonce = this.get_payment_id_nonce(payment_id, pid_encrypt);
console.log("Extra nonce: " + nonce);
extra = this.add_nonce_to_extra(extra, nonce);
}
// for sending to a subaddress, need to generate new tx public key
//var sub_addr_decoded = this.decode_address(dsts[0].address); // for example dest[0] is subaddress
//txkey.pub = ge_scalarmult(sub_addr_decoded.spend, txkey.sec);
var tx = {
unlock_time: unlock_time,
version: rct ? CURRENT_TX_VERSION : OLD_TX_VERSION,
extra: extra,
prvkey: '',
vin: [],
vout: []
};
if (rct) {
tx.rct_signatures = {};
} else {
tx.signatures = [];
}
//tx.extra = this.add_pub_key_to_extra(tx.extra, txkey.pub);
tx.prvkey = txkey.sec;
var in_contexts = [];
var is_rct_coinbases = []; // monkey patching to solve problem of
// not being able to spend coinbase ringct txs.
var inputs_money = JSBigInt.ZERO;
var i, j;
console.log('Sources: ');
for (i = 0; i < sources.length; i++)
{
console.log(i + ': ' + this.formatMoneyFull(sources[i].amount));
if (sources[i].real_out >= sources[i].outputs.length) {
throw "real index >= outputs.length";
}
inputs_money = inputs_money.add(sources[i].amount);
// sets res.mask among other things. mask is identity for non-rct transactions
// and for coinbase ringct (type = 0) txs.
var res = this.generate_key_image_helper_rct(keys, sources[i].real_out_tx_key, sources[i].real_out_in_tx, sources[i].mask); //mask will be undefined for non-rct
in_contexts.push(res.in_ephemeral);
// now we mark if this is ringct coinbase txs. such transactions
// will have identity mask. Non-ringct txs will have sources[i].mask set to null.
// this only works if beckend will produce masks in get_unspent_outs for
// coinbaser ringct txs.
is_rct_coinbases.push((sources[i].mask ? sources[i].mask === I : 0));
if (res.in_ephemeral.pub !== sources[i].outputs[sources[i].real_out].key) {
throw "in_ephemeral.pub != source.real_out.key";
}
var input_to_key = {};
input_to_key.type = "input_to_key";
input_to_key.amount = sources[i].amount;
input_to_key.k_image = res.image;
input_to_key.key_offsets = [];
for (j = 0; j < sources[i].outputs.length; ++j) {
input_to_key.key_offsets.push(sources[i].outputs[j].index);
}
input_to_key.key_offsets = this.abs_to_rel_offsets(input_to_key.key_offsets);
tx.vin.push(input_to_key);
}
// new to sort key_imags and associated variables.
var ins_order = [];
for (var i = 0; i < tx.vin.length; i++){
ins_order.push(i);
}
// determine indexes which we should sort.
ins_order.sort(function(i0, i1) {
if (tx.vin[i0].k_image < tx.vin[i1].k_image) {
return 1;
}
if (tx.vin[i0].k_image > tx.vin[i1].k_image) {
return -1;
}
return 0;
});
// sort key images along with rources and contexts.
tx.vin = rearrange(tx.vin , ins_order);
sources = rearrange(sources, ins_order);
in_contexts = rearrange(in_contexts, ins_order);
var outputs_money = JSBigInt.ZERO;
var out_index = 0;
var amountKeys = []; //rct only
for (i = 0; i < dsts.length; ++i) {
if (new JSBigInt(dsts[i].amount).compare(0) < 0) {
throw "dst.amount < 0"; //amount can be zero if no change
}
dsts[i].keys = this.decode_address(dsts[i].address);
if (this.is_subaddress(dsts[i].address)) {
txkey.pub = ge_scalarmult(dsts[i].keys.spend, txkey.sec);
}
var out_derivation;
// if destination public view and spend keys matches our own public keys
// we send change to ourself
if (dsts[i].keys.view === keys.view.pub && dsts[i].keys.spend === keys.spend.pub) {
out_derivation = this.generate_key_derivation(txkey.pub, keys.view.sec);
}
else {
out_derivation = this.generate_key_derivation(dsts[i].keys.view, txkey.sec);
}
if (rct) {
amountKeys.push(this.derivation_to_scalar(out_derivation, out_index));
}
var out_ephemeral_pub = this.derive_public_key(
out_derivation, out_index, dsts[i].keys.spend);
var out = {
amount: dsts[i].amount.toString()
};
// txout_to_key
out.target = {
type: "txout_to_key",
key: out_ephemeral_pub
};
tx.vout.push(out);
++out_index;
outputs_money = outputs_money.add(dsts[i].amount);
}
tx.extra = this.add_pub_key_to_extra(tx.extra, txkey.pub);
if (outputs_money.add(fee_amount).compare(inputs_money) > 0) {
throw "outputs money (" + this.formatMoneyFull(outputs_money) + ") + fee (" + this.formatMoneyFull(fee_amount) + ") > inputs money (" + this.formatMoneyFull(inputs_money) + ")";
}
if (!rct) {
for (i = 0; i < sources.length; ++i) {
var src_keys = [];
for (j = 0; j < sources[i].outputs.length; ++j) {
src_keys.push(sources[i].outputs[j].key);
}
var sigs = this.generate_ring_signature(this.get_tx_prefix_hash(tx), tx.vin[i].k_image, src_keys,
in_contexts[i].sec, sources[i].real_out);
tx.signatures.push(sigs);
}
} else { //rct
var txnFee = fee_amount;
var keyimages = [];
var inSk = [];
var inAmounts = [];
var mixRing = [];
var indices = [];
for (i = 0; i < tx.vin.length; i++) {
keyimages.push(tx.vin[i].k_image);
inSk.push({
x: in_contexts[i].sec,
a: in_contexts[i].mask
});
inAmounts.push(tx.vin[i].amount);
//if (in_contexts[i].mask !== I) {//if input is rct (has a valid mask), 0 out amount
//tx.vin[i].amount = "0";
//}
if (in_contexts[i].mask !== I || is_rct_coinbases[i] === true)
{
// if input is rct (has a valid mask), 0 out amount
// coinbase ringct txs also have mask === I, so their amount
// must be set to zero when spending them.
tx.vin[i].amount = "0";
}
mixRing[i] = [];
for (j = 0; j < sources[i].outputs.length; j++) {
mixRing[i].push({
dest: sources[i].outputs[j].key,
mask: sources[i].outputs[j].commit
});
}
indices.push(sources[i].real_out);
}
var outAmounts = [];
for (i = 0; i < tx.vout.length; i++) {
outAmounts.push(tx.vout[i].amount);
tx.vout[i].amount = "0"; //zero out all rct outputs
}
var tx_prefix_hash = this.get_tx_prefix_hash(tx);
tx.rct_signatures = genRct(tx_prefix_hash, inSk, keyimages, /*destinations, */inAmounts, outAmounts, mixRing, amountKeys, indices, txnFee);
}
console.log(tx);
return tx;
};
this.create_transaction = function(pub_keys, sec_keys, dsts, outputs, mix_outs, fake_outputs_count, fee_amount, payment_id, pid_encrypt, realDestViewKey, unlock_time, rct) {
unlock_time = unlock_time || 0;
mix_outs = mix_outs || [];
var i, j;
if (dsts.length === 0) {
throw 'Destinations empty';
}
if (mix_outs.length !== outputs.length && fake_outputs_count !== 0) {
throw 'Wrong number of mix outs provided (' + outputs.length + ' outputs, ' + mix_outs.length + ' mix outs)';
}
for (i = 0; i < mix_outs.length; i++) {
if ((mix_outs[i].outputs || []).length < fake_outputs_count) {
throw 'Not enough outputs to mix with';
}
}
var keys = {
view: {
pub: pub_keys.view,
sec: sec_keys.view
},
spend: {
pub: pub_keys.spend,
sec: sec_keys.spend
}
};
if (!this.valid_keys(keys.view.pub, keys.view.sec, keys.spend.pub, keys.spend.sec)) {
throw "Invalid secret keys!";
}
var needed_money = JSBigInt.ZERO;
for (i = 0; i < dsts.length; ++i) {
needed_money = needed_money.add(dsts[i].amount);
if (needed_money.compare(UINT64_MAX) !== -1) {
throw "Output overflow!";
}
}
var found_money = JSBigInt.ZERO;
var sources = [];
console.log('Selected transfers: ', outputs);
for (i = 0; i < outputs.length; ++i) {
found_money = found_money.add(outputs[i].amount);
if (found_money.compare(UINT64_MAX) !== -1) {
throw "Input overflow!";
}
var src = {
outputs: []
};
src.amount = new JSBigInt(outputs[i].amount).toString();
if (mix_outs.length !== 0) {
// Sort fake outputs by global index
mix_outs[i].outputs.sort(function(a, b) {
return new JSBigInt(a.global_index).compare(b.global_index);
});
j = 0;
while ((src.outputs.length < fake_outputs_count) && (j < mix_outs[i].outputs.length)) {
var out = mix_outs[i].outputs[j];
if (out.global_index === outputs[i].global_index) {
console.log('got mixin the same as output, skipping');
j++;
continue;
}
var oe = {};
oe.index = out.global_index.toString();
oe.key = out.public_key;
if (rct){
if (out.rct){
oe.commit = out.rct.slice(0,64); //add commitment from rct mix outs
} else {
if (outputs[i].rct) {throw "mix rct outs missing commit";}
oe.commit = zeroCommit(d2s(src.amount)); //create identity-masked commitment for non-rct mix input
}
}
src.outputs.push(oe);
j++;
}
}
var real_oe = {};
real_oe.index = new JSBigInt(outputs[i].global_index || 0).toString();
real_oe.key = outputs[i].public_key;
if (rct){
if (outputs[i].rct) {
real_oe.commit = outputs[i].rct.slice(0,64); //add commitment for real input
} else {
real_oe.commit = zeroCommit(d2s(src.amount)); //create identity-masked commitment for non-rct input
}
}
var real_index = src.outputs.length;
for (j = 0; j < src.outputs.length; j++) {
if (new JSBigInt(real_oe.index).compare(src.outputs[j].index) < 0) {
real_index = j;
break;
}
}
// Add real_oe to outputs
src.outputs.splice(real_index, 0, real_oe);
src.real_out_tx_key = outputs[i].tx_pub_key;
// Real output entry index
src.real_out = real_index;
src.real_out_in_tx = outputs[i].index;
if (rct){
if (outputs[i].rct) {
src.mask = outputs[i].rct.slice(64,128); //encrypted or idenity mask for coinbase txs.
} else {
src.mask = null; //will be set by generate_key_image_helper_rct
}
}
sources.push(src);
}
console.log('sources: ', sources);
var change = {
amount: JSBigInt.ZERO
};
var cmp = needed_money.compare(found_money);
if (cmp < 0) {
change.amount = found_money.subtract(needed_money);
if (change.amount.compare(fee_amount) !== 0) {
throw "early fee calculation != later";
}
} else if (cmp > 0) {
throw "Need more money than found! (have: " + cnUtil.formatMoney(found_money) + " need: " + cnUtil.formatMoney(needed_money) + ")";
}
return this.construct_tx(keys, sources, dsts, fee_amount, payment_id, pid_encrypt, realDestViewKey, unlock_time, rct);
};
this.estimateRctSize = function(inputs, mixin, outputs) {
var size = 0;
size += outputs * 6306;
size += ((mixin + 1) * 4 + 32 + 8) * inputs; //key offsets + key image + amount
size += 64 * (mixin + 1) * inputs + 64 * inputs; //signature + pseudoOuts/cc
size += 74; //extra + whatever, assume long payment ID
return size;
};
function trimRight(str, char) {
while (str[str.length - 1] == char) str = str.slice(0, -1);
return str;
}
function padLeft(str, len, char) {
while (str.length < len) {
str = char + str;
}
return str;
}
this.printDsts = function(dsts) {
for (var i = 0; i < dsts.length; i++) {
console.log(dsts[i].address + ': ' + this.formatMoneyFull(dsts[i].amount));
}
};
this.formatMoneyFull = function(units) {
units = units.toString();
var symbol = units[0] === '-' ? '-' : '';
if (symbol === '-') {
units = units.slice(1);
}
var decimal;
if (units.length >= config.coinUnitPlaces) {
decimal = units.substr(units.length - config.coinUnitPlaces, config.coinUnitPlaces);
} else {
decimal = padLeft(units, config.coinUnitPlaces, '0');
}
return symbol + (units.substr(0, units.length - config.coinUnitPlaces) || '0') + '.' + decimal;
};
this.formatMoneyFullSymbol = function(units) {
return this.formatMoneyFull(units) + ' ' + config.coinSymbol;
};
this.formatMoney = function(units) {
var f = trimRight(this.formatMoneyFull(units), '0');
if (f[f.length - 1] === '.') {
return f.slice(0, f.length - 1);
}
return f;
};
this.formatMoneySymbol = function(units) {
return this.formatMoney(units) + ' ' + config.coinSymbol;
};
this.parseMoney = function(str) {
if (!str) return JSBigInt.ZERO;
var negative = str[0] === '-';
if (negative) {
str = str.slice(1);
}
var decimalIndex = str.indexOf('.');
if (decimalIndex == -1) {
if (negative) {
return JSBigInt.multiply(str, config.coinUnits).negate();
}
return JSBigInt.multiply(str, config.coinUnits);
}
if (decimalIndex + config.coinUnitPlaces + 1 < str.length) {
str = str.substr(0, decimalIndex + config.coinUnitPlaces + 1);
}
if (negative) {
return new JSBigInt(str.substr(0, decimalIndex)).exp10(config.coinUnitPlaces)
.add(new JSBigInt(str.substr(decimalIndex + 1)).exp10(decimalIndex + config.coinUnitPlaces - str.length + 1)).negate;
}
return new JSBigInt(str.substr(0, decimalIndex)).exp10(config.coinUnitPlaces)
.add(new JSBigInt(str.substr(decimalIndex + 1)).exp10(decimalIndex + config.coinUnitPlaces - str.length + 1));
};
this.decompose_amount_into_digits = function(amount) {
/*if (dust_threshold === undefined) {
dust_threshold = config.dustThreshold;
}*/
amount = amount.toString();
var ret = [];
while (amount.length > 0) {
//split all the way down since v2 fork
/*var remaining = new JSBigInt(amount);
if (remaining.compare(config.dustThreshold) <= 0) {
if (remaining.compare(0) > 0) {
ret.push(remaining);
}
break;
}*/
//check so we don't create 0s
if (amount[0] !== "0"){
var digit = amount[0];
while (digit.length < amount.length) {
digit += "0";
}
ret.push(new JSBigInt(digit));
}
amount = amount.slice(1);
}
return ret;
};
this.decompose_tx_destinations = function(dsts, rct) {
var out = [];
if (rct) {
for (var i = 0; i < dsts.length; i++) {
out.push({
address: dsts[i].address,
amount: dsts[i].amount
});
}
} else {
for (var i = 0; i < dsts.length; i++) {
var digits = this.decompose_amount_into_digits(dsts[i].amount);
for (var j = 0; j < digits.length; j++) {
if (digits[j].compare(0) > 0) {
out.push({
address: dsts[i].address,
amount: digits[j]
});
}
}
}
}
return out.sort(function(a,b){
return a["amount"] - b["amount"];
});
};
this.is_tx_unlocked = function(unlock_time, blockchain_height) {
if (!config.maxBlockNumber) {
throw "Max block number is not set in config!";
}
if (unlock_time < config.maxBlockNumber) {
// unlock time is block height
return blockchain_height >= unlock_time;
} else {
// unlock time is timestamp
var current_time = Math.round(new Date().getTime() / 1000);
return current_time >= unlock_time;
}
};
this.tx_locked_reason = function(unlock_time, blockchain_height) {
if (unlock_time < config.maxBlockNumber) {
// unlock time is block height
var numBlocks = unlock_time - blockchain_height;
if (numBlocks <= 0) {
return "Transaction is unlocked";
}
var unlock_prediction = moment().add(numBlocks * config.avgBlockTime, 'seconds');
//return "Will be unlocked in " + numBlocks + " blocks, ~" + unlock_prediction.fromNow(true) + ", " + unlock_prediction.calendar() + "";
return "Will be unlocked in " + numBlocks + " blocks, ~" + unlock_prediction.fromNow(true);
} else {
// unlock time is timestamp
var current_time = Math.round(new Date().getTime() / 1000);
var time_difference = unlock_time - current_time;
if(time_difference <= 0) {
return "Transaction is unlocked";
}
var unlock_moment = moment(unlock_time * 1000);
//return "Will be unlocked " + unlock_moment.fromNow() + ", " + unlock_moment.calendar();
return "Will be unlocked " + unlock_moment.fromNow();
}
};
//decode amount and mask and check against commitment
// from https://xmr.llcoins.net/js/site.js
// from https://xmr.llcoins.net/js/site.js
this.decodeRct = function(rv, i, der){
var key = derivation_to_scalar(der, i);
var ecdh = decode_rct_ecdh(rv.ecdhInfo[i], key);
//console.log(ecdh);
var Ctmp = commit(ecdh.amount, ecdh.mask);
//console.log(Ctmp);
if (Ctmp !== rv.outPk[i]){
throw "mismatched commitments!";
}
ecdh.amount = s2d(ecdh.amount);
return ecdh;
};
function assert(stmt, val) {
if (!stmt) {
throw "assert failed" + (val !== undefined ? ': ' + val : '');
}
}
return this;
})(config);
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