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@zkp2p/reclaim-witness-sdk

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"use strict"; // noinspection ExceptionCaughtLocallyJS Object.defineProperty(exports, "__esModule", { value: true }); exports.extractHTMLElement = extractHTMLElement; exports.extractHTMLElements = extractHTMLElements; exports.extractHTMLElementIndex = extractHTMLElementIndex; exports.extractHTMLElementsIndexes = extractHTMLElementsIndexes; exports.extractJSONValueIndex = extractJSONValueIndex; exports.extractJSONValueIndexes = extractJSONValueIndexes; exports.buildHeaders = buildHeaders; exports.convertResponsePosToAbsolutePos = convertResponsePosToAbsolutePos; exports.getRedactionsForChunkHeaders = getRedactionsForChunkHeaders; exports.parseHttpResponse = parseHttpResponse; exports.makeRegex = makeRegex; exports.matchRedactedStrings = matchRedactedStrings; exports.generateRequstAndResponseFromTranscript = generateRequstAndResponseFromTranscript; const tls_1 = require("@reclaimprotocol/tls"); const esprima_next_1 = require("esprima-next"); const jsonpath_plus_1 = require("jsonpath-plus"); const utils_1 = require("../../utils"); let RE2; try { RE2 = require('re2'); if (!Object.keys(RE2).length) { RE2 = undefined; throw new Error(); } } catch (_a) { console.log('RE2 not found. Using standard regex'); } let jsd; if (typeof window !== 'undefined') { // @ts-ignore jsd = window.jsdom; } else { jsd = require('jsdom'); } /** * Returns only first extracted element * @param html * @param xpathExpression * @param contentsOnly */ function extractHTMLElement(html, xpathExpression, contentsOnly) { const { start, end } = extractHTMLElementIndex(html, xpathExpression, contentsOnly); return html.slice(start, end); } /** * Returns all extracted elements * @param html * @param xpathExpression * @param contentsOnly */ function extractHTMLElements(html, xpathExpression, contentsOnly) { const indexes = extractHTMLElementsIndexes(html, xpathExpression, contentsOnly); const res = []; for (const { start, end } of indexes) { res.push(html.slice(start, end)); } return res; } /** * returns a single index of extracted element * @param html * @param xpathExpression * @param contentsOnly */ function extractHTMLElementIndex(html, xpathExpression, contentsOnly) { return extractHTMLElementsIndexes(html, xpathExpression, contentsOnly)[0]; } /** * Returns indexes of all extracted elements * @param html * @param xpathExpression * @param contentsOnly */ function extractHTMLElementsIndexes(html, xpathExpression, contentsOnly) { const dom = new jsd.JSDOM(html, { contentType: 'text/html', includeNodeLocations: true }); const document = dom.window.document; const xpathResult = document.evaluate(xpathExpression, document, null, dom.window.XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null); const nodes = []; if ((xpathResult === null || xpathResult === void 0 ? void 0 : xpathResult.resultType) === dom.window.XPathResult.ORDERED_NODE_SNAPSHOT_TYPE && (xpathResult === null || xpathResult === void 0 ? void 0 : xpathResult.snapshotLength)) { for (let i = 0; i < xpathResult.snapshotLength; ++i) { nodes.push(xpathResult.snapshotItem(i)); } } if (!nodes.length) { throw new Error(`Failed to find XPath: "${xpathExpression}"`); } const res = []; for (const node of nodes) { const nodeLocation = dom.nodeLocation(node); if (!nodeLocation) { throw new Error(`Failed to find XPath node location: "${xpathExpression}"`); } if (contentsOnly) { const start = nodeLocation.startTag ? nodeLocation.startTag.endOffset : nodeLocation.startOffset; const end = nodeLocation.endTag ? nodeLocation.endTag.startOffset : nodeLocation.endOffset; res.push({ start, end }); } else { res.push({ start: nodeLocation.startOffset, end: nodeLocation.endOffset }); } } return res; } function extractJSONValueIndex(json, jsonPath) { return extractJSONValueIndexes(json, jsonPath)[0]; } function extractJSONValueIndexes(json, jsonPath) { const pointers = (0, jsonpath_plus_1.JSONPath)({ path: jsonPath, json: JSON.parse(json), wrap: false, resultType: 'pointer', eval: 'safe', // @ts-ignore ignoreEvalErrors: true }); if (!pointers) { throw new Error('jsonPath not found'); } const tree = (0, esprima_next_1.parseScript)('(' + json + ')', { range: true }); //wrap in parentheses for esprima to parse if (tree.body[0] instanceof esprima_next_1.ExpressionStatement && (tree.body[0].expression instanceof esprima_next_1.ObjectExpression || tree.body[0].expression instanceof esprima_next_1.ArrayExpression)) { const traversePointers = Array.isArray(pointers) ? pointers : [pointers]; const res = []; for (const pointer of traversePointers) { const index = traverse(tree.body[0].expression, '', [pointer]); if (index) { res.push({ start: index.start - 1, //account for '(' end: index.end - 1, }); } } return res; } throw new Error('jsonPath not found'); } /** * recursively go through AST tree and build a JSON path while it's not equal to the one we search for * @param o - esprima expression for root object * @param path - path that is being built * @param pointers - JSON pointers to compare to */ function traverse(o, path, pointers) { if (o instanceof esprima_next_1.ObjectExpression) { for (const p of o.properties) { if (!(p instanceof esprima_next_1.Property)) { continue; } const localPath = p.key.type === esprima_next_1.Syntax.Literal ? path + '/' + p.key.value : path; if (pointers.includes(localPath) && 'range' in p && Array.isArray(p.range)) { return { start: p.range[0], end: p.range[1], }; } if (p.value instanceof esprima_next_1.ObjectExpression || p.value instanceof esprima_next_1.ArrayExpression) { const res = traverse(p.value, localPath, pointers); if (res) { return res; } } } } if (o instanceof esprima_next_1.ArrayExpression) { for (let i = 0; i < o.elements.length; i++) { const element = o.elements[i]; if (!element) { continue; } const localPath = path + '/' + i; if (pointers.includes(localPath) && 'range' in element && Array.isArray(element.range)) { return { start: element.range[0], end: element.range[1], }; } if (element instanceof esprima_next_1.ObjectExpression) { const res = traverse(element, localPath, pointers); if (res) { return res; } } if (element instanceof esprima_next_1.ArrayExpression) { const res = traverse(element, localPath, pointers); if (res) { return res; } } } } return null; } function buildHeaders(input) { const headers = []; for (const [key, value] of Object.entries(input || {})) { headers.push(`${key}: ${value}`); } return headers; } /** * Converts position in HTTP response body to an absolute position in TLS transcript considering chunked encoding * @param pos * @param bodyStartIdx * @param chunks */ function convertResponsePosToAbsolutePos(pos, bodyStartIdx, chunks) { if (chunks === null || chunks === void 0 ? void 0 : chunks.length) { let chunkBodyStart = 0; for (const chunk of chunks) { const chunkSize = chunk.toIndex - chunk.fromIndex; if (pos >= chunkBodyStart && pos <= (chunkBodyStart + chunkSize)) { return pos - chunkBodyStart + chunk.fromIndex; } chunkBodyStart += chunkSize; } throw new Error('position out of range'); } return bodyStartIdx + pos; } /** * If this reveal spans the boundary of two chunks, we'll * */ function getRedactionsForChunkHeaders(from, to, chunks) { const res = []; if (!(chunks === null || chunks === void 0 ? void 0 : chunks.length)) { return res; } for (let i = 1; i < (chunks === null || chunks === void 0 ? void 0 : chunks.length); i++) { const chunk = chunks[i]; if (chunk.fromIndex > from && chunk.fromIndex < to) { res.push({ fromIndex: chunks[i - 1].toIndex, toIndex: chunk.fromIndex, }); } } return res; } function parseHttpResponse(buff) { const parser = (0, utils_1.makeHttpResponseParser)(); parser.onChunk(buff); parser.streamEnded(); return parser.res; } function makeRegex(str) { if (RE2 !== undefined) { return RE2(str, 'sgiu'); } return new RegExp(str, 'sgi'); } const TEMPLATE_START_CHARCODE = '{'.charCodeAt(0); const TEMPLATE_END_CHARCODE = '}'.charCodeAt(0); /** * Try to match strings that contain templates like {{param}} * against redacted string that has *** instead of that param */ function matchRedactedStrings(templateString, redactedString) { if (templateString.length === 0 && (redactedString === null || redactedString === void 0 ? void 0 : redactedString.length) === 0) { return true; } if (!redactedString) { return false; } let ts = -1; let rs = -1; while (ts < templateString.length && rs < redactedString.length) { let ct = getTChar(); let cr = getRChar(); if (ct !== cr) { // only valid if param contains "{" & redacted contains "*" if (ct === TEMPLATE_START_CHARCODE && cr === utils_1.REDACTION_CHAR_CODE) { //check that the char after first "{" is also "{" if (getTChar() !== TEMPLATE_START_CHARCODE) { return false; } //look for first closing bracket while (((ct = getTChar()) !== TEMPLATE_END_CHARCODE) && ct !== -1) { } //look for second closing bracket while (((ct = getTChar()) !== TEMPLATE_END_CHARCODE) && ct !== -1) { } if (ct === -1) { return false; } //find the end of redaction while (((cr = getRChar()) === utils_1.REDACTION_CHAR_CODE) && cr !== -1) { } if (cr === -1) { //if there's nothing after template too then both ended at the end of strings return getTChar() === -1; } //rewind redacted string position back 1 char because we read one extra rs--; } else { return false; } } } function getTChar() { ts++; if (ts < templateString.length) { return templateString[ts]; } else { return -1; } } function getRChar() { if (!redactedString) { return -1; } rs++; if (rs < redactedString.length) { return redactedString[rs]; } else { return -1; } } return ts === templateString.length && rs === redactedString.length; } function generateRequstAndResponseFromTranscript(transcript, tlsVersion) { const allPackets = transcript; const packets = []; for (const b of allPackets) { if (b.message.type !== 'ciphertext' || !(0, utils_1.isApplicationData)(b.message, tlsVersion)) { continue; } const plaintext = tlsVersion === 'TLS1_3' ? b.message.plaintext.slice(0, -1) : b.message.plaintext; packets.push({ message: plaintext, sender: b.sender }); } const req = (0, utils_1.getHttpRequestDataFromTranscript)(packets); const responsePackets = (0, tls_1.concatenateUint8Arrays)(packets.filter(p => p.sender === 'server').map(p => p.message).filter(b => !b.every(b => b === utils_1.REDACTION_CHAR_CODE))); const res = parseHttpResponse(responsePackets); return { req, res }; } //# 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