FM / dist

/snap/node/11691/lib/node_modules/npm/node_modules/tuf-js/node_modules/@tufjs/models/dist/

/snap/node/11691/lib/node_modules/npm/node_modules/tuf-js/node_modules/@tufjs/models/dist

Name	Size	Mode	Actions
utils/	-	0755	rm
base.js	3492	0644	edit dl rm
delegations.js	3967	0644	edit dl rm
error.js	1217	0644	edit dl rm
file.js	6613	0644	edit dl rm
index.js	1909	0644	edit dl rm
key.js	3153	0644	edit dl rm
metadata.js	6374	0644	edit dl rm
role.js	11264	0644	edit dl rm
root.js	4203	0644	edit dl rm
signature.js	1018	0644	edit dl rm
snapshot.js	2395	0644	edit dl rm
targets.js	3060	0644	edit dl rm
timestamp.js	2003	0644	edit dl rm

Edit: /snap/node/11691/lib/node_modules/npm/node_modules/tuf-js/node_modules/@tufjs/models/dist/file.js (6613B)

"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');
    }
}

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