diff options
Diffstat (limited to 'deps/npm/node_modules/@tufjs/models/dist/file.js')
-rw-r--r-- | deps/npm/node_modules/@tufjs/models/dist/file.js | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/deps/npm/node_modules/@tufjs/models/dist/file.js b/deps/npm/node_modules/@tufjs/models/dist/file.js new file mode 100644 index 0000000000..b35fe5950b --- /dev/null +++ b/deps/npm/node_modules/@tufjs/models/dist/file.js @@ -0,0 +1,183 @@ +"use strict"; +var __importDefault = (this && this.__importDefault) || function (mod) { + return (mod && mod.__esModule) ? mod : { "default": mod }; +}; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.TargetFile = exports.MetaFile = void 0; +const crypto_1 = __importDefault(require("crypto")); +const util_1 = __importDefault(require("util")); +const error_1 = require("./error"); +const utils_1 = require("./utils"); +// A container with information about a particular metadata file. +// +// This class is used for Timestamp and Snapshot metadata. +class MetaFile { + constructor(opts) { + if (opts.version <= 0) { + throw new error_1.ValueError('Metafile version must be at least 1'); + } + if (opts.length !== undefined) { + validateLength(opts.length); + } + this.version = opts.version; + this.length = opts.length; + this.hashes = opts.hashes; + this.unrecognizedFields = opts.unrecognizedFields || {}; + } + equals(other) { + if (!(other instanceof MetaFile)) { + return false; + } + return (this.version === other.version && + this.length === other.length && + util_1.default.isDeepStrictEqual(this.hashes, other.hashes) && + util_1.default.isDeepStrictEqual(this.unrecognizedFields, other.unrecognizedFields)); + } + verify(data) { + // Verifies that the given data matches the expected length. + if (this.length !== undefined) { + if (data.length !== this.length) { + throw new error_1.LengthOrHashMismatchError(`Expected length ${this.length} but got ${data.length}`); + } + } + // Verifies that the given data matches the supplied hashes. + if (this.hashes) { + Object.entries(this.hashes).forEach(([key, value]) => { + let hash; + try { + hash = crypto_1.default.createHash(key); + } + catch (e) { + throw new error_1.LengthOrHashMismatchError(`Hash algorithm ${key} not supported`); + } + const observedHash = hash.update(data).digest('hex'); + if (observedHash !== value) { + throw new error_1.LengthOrHashMismatchError(`Expected hash ${value} but got ${observedHash}`); + } + }); + } + } + toJSON() { + const json = { + version: this.version, + ...this.unrecognizedFields, + }; + if (this.length !== undefined) { + json.length = this.length; + } + if (this.hashes) { + json.hashes = this.hashes; + } + return json; + } + static fromJSON(data) { + const { version, length, hashes, ...rest } = data; + if (typeof version !== 'number') { + throw new TypeError('version must be a number'); + } + if (utils_1.guard.isDefined(length) && typeof length !== 'number') { + throw new TypeError('length must be a number'); + } + if (utils_1.guard.isDefined(hashes) && !utils_1.guard.isStringRecord(hashes)) { + throw new TypeError('hashes must be string keys and values'); + } + return new MetaFile({ + version, + length, + hashes, + unrecognizedFields: rest, + }); + } +} +exports.MetaFile = MetaFile; +// Container for info about a particular target file. +// +// This class is used for Target metadata. +class TargetFile { + constructor(opts) { + validateLength(opts.length); + this.length = opts.length; + this.path = opts.path; + this.hashes = opts.hashes; + this.unrecognizedFields = opts.unrecognizedFields || {}; + } + get custom() { + const custom = this.unrecognizedFields['custom']; + if (!custom || Array.isArray(custom) || !(typeof custom === 'object')) { + return {}; + } + return custom; + } + equals(other) { + if (!(other instanceof TargetFile)) { + return false; + } + return (this.length === other.length && + this.path === other.path && + util_1.default.isDeepStrictEqual(this.hashes, other.hashes) && + util_1.default.isDeepStrictEqual(this.unrecognizedFields, other.unrecognizedFields)); + } + async verify(stream) { + let observedLength = 0; + // Create a digest for each hash algorithm + const digests = Object.keys(this.hashes).reduce((acc, key) => { + try { + acc[key] = crypto_1.default.createHash(key); + } + catch (e) { + throw new error_1.LengthOrHashMismatchError(`Hash algorithm ${key} not supported`); + } + return acc; + }, {}); + // Read stream chunk by chunk + for await (const chunk of stream) { + // Keep running tally of stream length + observedLength += chunk.length; + // Append chunk to each digest + Object.values(digests).forEach((digest) => { + digest.update(chunk); + }); + } + // Verify length matches expected value + if (observedLength !== this.length) { + throw new error_1.LengthOrHashMismatchError(`Expected length ${this.length} but got ${observedLength}`); + } + // Verify each digest matches expected value + Object.entries(digests).forEach(([key, value]) => { + const expected = this.hashes[key]; + const actual = value.digest('hex'); + if (actual !== expected) { + throw new error_1.LengthOrHashMismatchError(`Expected hash ${expected} but got ${actual}`); + } + }); + } + toJSON() { + return { + length: this.length, + hashes: this.hashes, + ...this.unrecognizedFields, + }; + } + static fromJSON(path, data) { + const { length, hashes, ...rest } = data; + if (typeof length !== 'number') { + throw new TypeError('length must be a number'); + } + if (!utils_1.guard.isStringRecord(hashes)) { + throw new TypeError('hashes must have string keys and values'); + } + return new TargetFile({ + length, + path, + hashes, + unrecognizedFields: rest, + }); + } +} +exports.TargetFile = TargetFile; +// Check that supplied length if valid +function validateLength(length) { + if (length < 0) { + throw new error_1.ValueError('Length must be at least 0'); + } +} |