source: trip-planner-front/node_modules/sshpk/bin/sshpk-verify@ e29cc2e

#!/usr/bin/env node
// -*- mode: js -*-
// vim: set filetype=javascript :
// Copyright 2015 Joyent, Inc.  All rights reserved.

var dashdash = require('dashdash');
var sshpk = require('../lib/index');
var fs = require('fs');
var path = require('path');
var Buffer = require('safer-buffer').Buffer;

var options = [
        {
                names: ['hash', 'H'],
                type: 'string',
                help: 'Hash algorithm (sha1, sha256, sha384, sha512)'
        },
        {
                names: ['verbose', 'v'],
                type: 'bool',
                help: 'Display verbose info about key and hash used'
        },
        {
                names: ['identity', 'i'],
                type: 'string',
                help: 'Path to (public) key to use'
        },
        {
                names: ['file', 'f'],
                type: 'string',
                help: 'Input filename'
        },
        {
                names: ['format', 't'],
                type: 'string',
                help: 'Signature format (asn1, ssh, raw)'
        },
        {
                names: ['signature', 's'],
                type: 'string',
                help: 'base64-encoded signature data'
        },
        {
                names: ['help', 'h'],
                type: 'bool',
                help: 'Shows this help text'
        }
];

if (require.main === module) {
        var parser = dashdash.createParser({
                options: options
        });

        try {
                var opts = parser.parse(process.argv);
        } catch (e) {
                console.error('sshpk-verify: error: %s', e.message);
                process.exit(3);
        }

        if (opts.help || opts._args.length > 1) {
                var help = parser.help({}).trimRight();
                console.error('sshpk-verify: sign data using an SSH key\n');
                console.error(help);
                process.exit(3);
        }

        if (!opts.identity) {
                var help = parser.help({}).trimRight();
                console.error('sshpk-verify: the -i or --identity option ' +
                    'is required\n');
                console.error(help);
                process.exit(3);
        }

        if (!opts.signature) {
                var help = parser.help({}).trimRight();
                console.error('sshpk-verify: the -s or --signature option ' +
                    'is required\n');
                console.error(help);
                process.exit(3);
        }

        var keyData = fs.readFileSync(opts.identity);

        var key;
        try {
                key = sshpk.parseKey(keyData);
        } catch (e) {
                console.error('sshpk-verify: error loading key "' +
                    opts.identity + '": ' + e.name + ': ' + e.message);
                process.exit(2);
        }

        var fmt = opts.format || 'asn1';
        var sigData = Buffer.from(opts.signature, 'base64');

        var sig;
        try {
                sig = sshpk.parseSignature(sigData, key.type, fmt);
        } catch (e) {
                console.error('sshpk-verify: error parsing signature: ' +
                    e.name + ': ' + e.message);
                process.exit(2);
        }

        var hash = opts.hash || key.defaultHashAlgorithm();

        var verifier;
        try {
                verifier = key.createVerify(hash);
        } catch (e) {
                console.error('sshpk-verify: error creating verifier: ' +
                    e.name + ': ' + e.message);
                process.exit(2);
        }

        if (opts.verbose) {
                console.error('sshpk-verify: using %s-%s with a %d bit key',
                    key.type, hash, key.size);
        }

        var inFile = process.stdin;
        var inFileName = 'stdin';

        var inFilePath;
        if (opts.file) {
                inFilePath = opts.file;
        } else if (opts._args.length === 1) {
                inFilePath = opts._args[0];
        }

        if (inFilePath)
                inFileName = path.basename(inFilePath);

        try {
                if (inFilePath) {
                        fs.accessSync(inFilePath, fs.R_OK);
                        inFile = fs.createReadStream(inFilePath);
                }
        } catch (e) {
                console.error('sshpk-verify: error opening input file' +
                     ': ' + e.name + ': ' + e.message);
                process.exit(2);
        }

        inFile.pipe(verifier);
        inFile.on('end', function () {
                var ret;
                try {
                        ret = verifier.verify(sig);
                } catch (e) {
                        console.error('sshpk-verify: error verifying data: ' +
                            e.name + ': ' + e.message);
                        process.exit(1);
                }

                if (ret) {
                        console.error('OK');
                        process.exit(0);
                }

                console.error('NOT OK');
                process.exit(1);
        });
}