@xmr-core/xmr-crypto-utils
Version:
Core crypto operations for Monero and implementations and interfaces of various hardware devices for creating Monero transactions securely
67 lines • 3.58 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
const xmr_vendor_1 = require("@xmr-core/xmr-vendor");
const constants_1 = require("./constants");
const xmr_str_utils_1 = require("@xmr-core/xmr-str-utils");
const hash_ops_1 = require("./hash_ops");
function derive_key_image_from_tx(tx_pub, view_sec, spend_pub, spend_sec, output_index, hwdev) {
return __awaiter(this, void 0, void 0, function* () {
if (tx_pub.length !== 64) {
throw Error("Invalid tx_pub length");
}
if (view_sec.length !== 64) {
throw Error("Invalid view_sec length");
}
if (spend_pub.length !== 64) {
throw Error("Invalid spend_pub length");
}
if (spend_sec.length !== 64) {
throw Error("Invalid spend_sec length");
}
const recv_derivation = yield hwdev.generate_key_derivation(tx_pub, view_sec);
const ephemeral_sec = yield hwdev.derive_secret_key(recv_derivation, output_index, spend_sec);
const ephemeral_pub = yield hwdev.secret_key_to_public_key(ephemeral_sec);
const key_image = yield hwdev.generate_key_image(ephemeral_pub, ephemeral_sec);
return {
ephemeral_pub,
key_image,
};
});
}
exports.derive_key_image_from_tx = derive_key_image_from_tx;
function generate_key_image(pub, sec) {
if (!pub || !sec || pub.length !== 64 || sec.length !== 64) {
throw Error("Invalid input length");
}
const pub_m = xmr_vendor_1.CNCrypto._malloc(constants_1.KEY_SIZE);
const sec_m = xmr_vendor_1.CNCrypto._malloc(constants_1.KEY_SIZE);
xmr_vendor_1.CNCrypto.HEAPU8.set(xmr_str_utils_1.hextobin(pub), pub_m);
xmr_vendor_1.CNCrypto.HEAPU8.set(xmr_str_utils_1.hextobin(sec), sec_m);
if (xmr_vendor_1.CNCrypto.ccall("sc_check", "number", ["number"], [sec_m]) !== 0) {
throw Error("sc_check(sec) != 0");
}
const point_m = xmr_vendor_1.CNCrypto._malloc(constants_1.STRUCT_SIZES.GE_P3);
const point2_m = xmr_vendor_1.CNCrypto._malloc(constants_1.STRUCT_SIZES.GE_P2);
const point_b = xmr_str_utils_1.hextobin(hash_ops_1.hash_to_ec(pub));
xmr_vendor_1.CNCrypto.HEAPU8.set(point_b, point_m);
const image_m = xmr_vendor_1.CNCrypto._malloc(constants_1.STRUCT_SIZES.KEY_IMAGE);
xmr_vendor_1.CNCrypto.ccall("ge_scalarmult", "void", ["number", "number", "number"], [point2_m, sec_m, point_m]);
xmr_vendor_1.CNCrypto.ccall("ge_tobytes", "void", ["number", "number"], [image_m, point2_m]);
const res = xmr_vendor_1.CNCrypto.HEAPU8.subarray(image_m, image_m + constants_1.STRUCT_SIZES.KEY_IMAGE);
xmr_vendor_1.CNCrypto._free(pub_m);
xmr_vendor_1.CNCrypto._free(sec_m);
xmr_vendor_1.CNCrypto._free(point_m);
xmr_vendor_1.CNCrypto._free(point2_m);
xmr_vendor_1.CNCrypto._free(image_m);
return xmr_str_utils_1.bintohex(res);
}
exports.generate_key_image = generate_key_image;
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