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# Node-RSA
Node.js RSA library<br/>
Based on jsbn library from Tom Wu http://www-cs-students.stanford.edu/~tjw/jsbn/
* Pure JavaScript
* No needed OpenSSL
* Generating keys
* Supports long messages for encrypt/decrypt
* Signing and verifying
## Example
```javascript
const NodeRSA = require('node-rsa');
const key = new NodeRSA({b: 512});
const text = 'Hello RSA!';
const encrypted = key.encrypt(text, 'base64');
console.log('encrypted: ', encrypted);
const decrypted = key.decrypt(encrypted, 'utf8');
console.log('decrypted: ', decrypted);
```
## Installing
```shell
npm install node-rsa
```
> <sub>Requires nodejs >= 8.11.1</sub>
### Testing
```shell
npm test
```
## Work environment
This library developed and tested primary for Node.js, but it still can work in browsers with [browserify](http://browserify.org/).
## Usage
### Create instance
```javascript
const NodeRSA = require('node-rsa');
const key = new NodeRSA([keyData, [format]], [options]);
```
* keyData — `{string|buffer|object}` — parameters for generating key or the key in one of supported formats.<br/>
* format — `{string}` — format for importing key. See more details about formats in [Export/Import](#importexport-keys) section.<br/>
* options — `{object}` — additional settings.
#### Options
You can specify some options by second/third constructor argument, or over `key.setOptions()` method.
* environment — working environment (default autodetect):
* `'browser'` — will run pure js implementation of RSA algorithms.
* `'node'` for `nodejs >= 0.10.x or io.js >= 1.x` — provide some native methods like sign/verify and encrypt/decrypt.
* encryptionScheme — padding scheme for encrypt/decrypt. Can be `'pkcs1_oaep'` or `'pkcs1'`. Default `'pkcs1_oaep'`.
* signingScheme — scheme used for signing and verifying. Can be `'pkcs1'` or `'pss'` or 'scheme-hash' format string (eg `'pss-sha1'`). Default `'pkcs1-sha256'`, or, if chosen pss: `'pss-sha1'`.
> *Notice:* This lib supporting next hash algorithms: `'md5'`, `'ripemd160'`, `'sha1'`, `'sha256'`, `'sha512'` in browser and node environment and additional `'md4'`, `'sha'`, `'sha224'`, `'sha384'` in node only.
<sub>Some [advanced options info](https://github.com/rzcoder/node-rsa/wiki/Advanced-options)</sub>
#### Creating "empty" key
```javascript
const key = new NodeRSA();
```
#### Generate new 512bit-length key
```javascript
const key = new NodeRSA({b: 512});
```
Also you can use next method:
```javascript
key.generateKeyPair([bits], [exp]);
```
* bits — `{int}` — key size in bits. 2048 by default.
* exp — `{int}` — public exponent. 65537 by default.
#### Load key from PEM string
```javascript
const key = new NodeRSA('-----BEGIN RSA PRIVATE KEY-----\n'+
'MIIBOQIBAAJAVY6quuzCwyOWzymJ7C4zXjeV/232wt2ZgJZ1kHzjI73wnhQ3WQcL\n'+
'DFCSoi2lPUW8/zspk0qWvPdtp6Jg5Lu7hwIDAQABAkBEws9mQahZ6r1mq2zEm3D/\n'+
'VM9BpV//xtd6p/G+eRCYBT2qshGx42ucdgZCYJptFoW+HEx/jtzWe74yK6jGIkWJ\n'+
'AiEAoNAMsPqwWwTyjDZCo9iKvfIQvd3MWnmtFmjiHoPtjx0CIQCIMypAEEkZuQUi\n'+
'pMoreJrOlLJWdc0bfhzNAJjxsTv/8wIgQG0ZqI3GubBxu9rBOAM5EoA4VNjXVigJ\n'+
'QEEk1jTkp8ECIQCHhsoq90mWM/p9L5cQzLDWkTYoPI49Ji+Iemi2T5MRqwIgQl07\n'+
'Es+KCn25OKXR/FJ5fu6A6A+MptABL3r8SEjlpLc=\n'+
'-----END RSA PRIVATE KEY-----');
```
### Import/Export keys
```javascript
key.importKey(keyData, [format]);
key.exportKey([format]);
```
* keyData — `{string|buffer}` — may be:
* key in PEM string
* Buffer containing PEM string
* Buffer containing DER encoded data
* Object contains key components
* format — `{string}` — format id for export/import.
#### Format string syntax
Format string composed of several parts: `scheme-[key_type]-[output_type]`<br/>
Scheme — NodeRSA supports multiple format schemes for import/export keys:
* `'pkcs1'` — public key starts from `'-----BEGIN RSA PUBLIC KEY-----'` header and private key starts from `'-----BEGIN RSA PRIVATE KEY-----'` header
* `'pkcs8'` — public key starts from `'-----BEGIN PUBLIC KEY-----'` header and private key starts from `'-----BEGIN PRIVATE KEY-----'` header
* `'openssh'` — public key starts from `'ssh-rsa'` header and private key starts from `'-----BEGIN OPENSSH PRIVATE KEY-----'` header
* `'components'` — use it for import/export key from/to raw components (see example below). For private key, importing data should contain all private key components, for public key: only public exponent (`e`) and modulus (`n`). All components (except `e`) should be Buffer, `e` could be Buffer or just normal Number.
Key type — can be `'private'` or `'public'`. Default `'private'`<br/>
Output type — can be:
* `'pem'` — Base64 encoded string with header and footer. Used by default.
* `'der'` — Binary encoded key data.
> *Notice:* For import, if *keyData* is PEM string or buffer containing string, you can do not specify format, but if you provide *keyData* as DER you must specify it in format string.
**Shortcuts and examples**
* `'private'` or `'pkcs1'` or `'pkcs1-private'` == `'pkcs1-private-pem'` — private key encoded in pcks1 scheme as pem string.
* `'public'` or `'pkcs8-public'` == `'pkcs8-public-pem'` — public key encoded in pcks8 scheme as pem string.
* `'pkcs8'` or `'pkcs8-private'` == `'pkcs8-private-pem'` — private key encoded in pcks8 scheme as pem string.
* `'pkcs1-der'` == `'pkcs1-private-der'` — private key encoded in pcks1 scheme as binary buffer.
* `'pkcs8-public-der'` — public key encoded in pcks8 scheme as binary buffer.
**Code example**
```javascript
const keyData = '-----BEGIN PUBLIC KEY----- ... -----END PUBLIC KEY-----';
key.importKey(keyData, 'pkcs8');
const publicDer = key.exportKey('pkcs8-public-der');
const privateDer = key.exportKey('pkcs1-der');
```
```javascript
key.importKey({
n: Buffer.from('0086fa9ba066685845fc03833a9699c8baefb53cfbf19052a7f10f1eaa30488cec1ceb752bdff2df9fad6c64b3498956e7dbab4035b4823c99a44cc57088a23783', 'hex'),
e: 65537,
d: Buffer.from('5d2f0dd982596ef781affb1cab73a77c46985c6da2aafc252cea3f4546e80f40c0e247d7d9467750ea1321cc5aa638871b3ed96d19dcc124916b0bcb296f35e1', 'hex'),
p: Buffer.from('00c59419db615e56b9805cc45673a32d278917534804171edcf925ab1df203927f', 'hex'),
q: Buffer.from('00aee3f86b66087abc069b8b1736e38ad6af624f7ea80e70b95f4ff2bf77cd90fd', 'hex'),
dmp1: Buffer.from('008112f5a969fcb56f4e3a4c51a60dcdebec157ee4a7376b843487b53844e8ac85', 'hex'),
dmq1: Buffer.from('1a7370470e0f8a4095df40922a430fe498720e03e1f70d257c3ce34202249d21', 'hex'),
coeff: Buffer.from('00b399675e5e81506b729a777cc03026f0b2119853dfc5eb124610c0ab82999e45', 'hex')
}, 'components');
const publicComponents = key.exportKey('components-public');
console.log(publicComponents);
/*
{ n: <Buffer 00 86 fa 9b a0 66 68 58 45 fc 03 83 3a 96 99 c8 ba ef b5 3c fb f1 90 52 a7 f1 0f 1e aa 30 48 8c ec 1c eb 75 2b df f2 df 9f ad 6c 64 b3 49 89 56 e7 db ... >,
e: 65537
}
*/
```
If you want to only import the public key use `'components-public'` as an option:
```javascript
key.importKey({
n: Buffer.from('0086fa9ba066685845fc03833a9699c8baefb53cfbf19052a7f10f1eaa30488cec1ceb752bdff2df9fad6c64b3498956e7dbab4035b4823c99a44cc57088a23783', 'hex'),
e: 65537,
}, 'components-public');
```
### Properties
#### Key testing
```javascript
key.isPrivate();
key.isPublic([strict]);
```
strict — `{boolean}` — if true method will return false if key pair have private exponent. Default `false`.
```javascript
key.isEmpty();
```
Return `true` if key pair doesn't have any data.
#### Key info
```javascript
key.getKeySize();
```
Return key size in bits.
```javascript
key.getMaxMessageSize();
```
Return max data size for encrypt in bytes.
### Encrypting/decrypting
```javascript
key.encrypt(buffer, [encoding], [source_encoding]);
key.encryptPrivate(buffer, [encoding], [source_encoding]); // use private key for encryption
```
Return encrypted data.<br/>
* buffer — `{buffer}` — data for encrypting, may be string, Buffer, or any object/array. Arrays and objects will encoded to JSON string first.<br/>
* encoding — `{string}` — encoding for output result, may be `'buffer'`, `'binary'`, `'hex'` or `'base64'`. Default `'buffer'`.<br/>
* source_encoding — `{string}` — source encoding, works only with string buffer. Can take standard Node.js Buffer encodings (hex, utf8, base64, etc). `'utf8'` by default.<br/>
```javascript
key.decrypt(buffer, [encoding]);
key.decryptPublic(buffer, [encoding]); // use public key for decryption
```
Return decrypted data.<br/>
* buffer — `{buffer}` — data for decrypting. Takes Buffer object or base64 encoded string.<br/>
* encoding — `{string}` — encoding for result string. Can also take `'buffer'` for raw Buffer object, or `'json'` for automatic JSON.parse result. Default `'buffer'`.
> *Notice:* `encryptPrivate` and `decryptPublic` using only pkcs1 padding type 1 (not random)
### Signing/Verifying
```javascript
key.sign(buffer, [encoding], [source_encoding]);
```
Return signature for buffer. All the arguments are the same as for `encrypt` method.
```javascript
key.verify(buffer, signature, [source_encoding], [signature_encoding])
```
Return result of check, `true` or `false`.<br/>
* buffer — `{buffer}` — data for check, same as `encrypt` method.<br/>
* signature — `{string}` — signature for check, result of `sign` method.<br/>
* source_encoding — `{string}` — same as for `encrypt` method.<br/>
* signature_encoding — `{string}` — encoding of given signature. May be `'buffer'`, `'binary'`, `'hex'` or `'base64'`. Default `'buffer'`.
## Contributing
Questions, comments, bug reports, and pull requests are all welcome.
## Changelog
### 1.1.0
* Added OpenSSH key format support.
### 1.0.2
* Importing keys from PEM now is less dependent on non-key data in files.
### 1.0.1
* `importKey()` now returns `this`
### 1.0.0
* Using semver now 🎉
* **Breaking change**: Drop support nodejs < 8.11.1
* **Possible breaking change**: `new Buffer()` call as deprecated was replaced by `Buffer.from` & `Buffer.alloc`.
* **Possible breaking change**: Drop support for hash scheme `sha` (was removed in node ~10). `sha1`, `sha256` and others still works.
* **Possible breaking change**: Little change in environment detect algorithm.
### 0.4.2
* `no padding` scheme will padded data with zeros on all environments.
### 0.4.1
* `PKCS1 no padding` scheme support.
### 0.4.0
* License changed from BSD to MIT.
* Some changes in internal api.
### 0.3.3
* Fixed PSS encode/verify methods with max salt length.
### 0.3.2
* Fixed environment detection in web worker.
### 0.3.0
* Added import/export from/to raw key components.
* Removed lodash from dependencies.
### 0.2.30
* Fixed a issue when the key was generated by 1 bit smaller than specified. It may slow down the generation of large keys.
### 0.2.24
* Now used old hash APIs for webpack compatible.
### 0.2.22
* `encryptPrivate` and `decryptPublic` now using only pkcs1 (type 1) padding.
### 0.2.20
* Added `.encryptPrivate()` and `.decryptPublic()` methods.
* Encrypt/decrypt methods in nodejs 0.12.x and io.js using native implementation (> 40x speed boost).
* Fixed some regex issue causing catastrophic backtracking.
### 0.2.10
* **Methods `.exportPrivate()` and `.exportPublic()` was replaced by `.exportKey([format])`.**
* By default `.exportKey()` returns private key as `.exportPrivate()`, if you need public key from `.exportPublic()` you must specify format as `'public'` or `'pkcs8-public-pem'`.
* Method `.importKey(key, [format])` now has second argument.
### 0.2.0
* **`.getPublicPEM()` method was renamed to `.exportPublic()`**
* **`.getPrivatePEM()` method was renamed to `.exportPrivate()`**
* **`.loadFromPEM()` method was renamed to `.importKey()`**
* Added PKCS1_OAEP encrypting/decrypting support.
* **PKCS1_OAEP now default scheme, you need to specify 'encryptingScheme' option to 'pkcs1' for compatibility with 0.1.x version of NodeRSA.**
* Added PSS signing/verifying support.
* Signing now supports `'md5'`, `'ripemd160'`, `'sha1'`, `'sha256'`, `'sha512'` hash algorithms in both environments
and additional `'md4'`, `'sha'`, `'sha224'`, `'sha384'` for nodejs env.
* **`options.signingAlgorithm` was renamed to `options.signingScheme`**
* Added `encryptingScheme` option.
* Property `key.options` now mark as private. Added `key.setOptions(options)` method.
### 0.1.54
* Added support for loading PEM key from Buffer (`fs.readFileSync()` output).
* Added `isEmpty()` method.
### 0.1.52
* Improve work with not properly trimming PEM strings.
### 0.1.50
* Implemented native js signing and verifying for browsers.
* `options.signingAlgorithm` now takes only hash-algorithm name.
* Added `.getKeySize()` and `.getMaxMessageSize()` methods.
* `.loadFromPublicPEM` and `.loadFromPrivatePEM` methods marked as private.
### 0.1.40
* Added signing/verifying.
### 0.1.30
* Added long message support.
## License
Copyright (c) 2014 rzcoder<br/>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
## Licensing for code used in rsa.js and jsbn.js
Copyright (c) 2003-2005 Tom Wu<br/>
All Rights Reserved.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
In addition, the following condition applies:
All redistributions must retain an intact copy of this copyright notice
and disclaimer.
[![Build Status](https://travis-ci.org/rzcoder/node-rsa.svg?branch=master)](https://travis-ci.org/rzcoder/node-rsa)

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module.exports = function (grunt) {
grunt.initConfig({
jshint: {
options: {},
default: {
files: {
src: ['gruntfile.js', 'src/**/*.js', '!src/libs/jsbn.js']
}
},
libs: {
files: {
src: ['src/libs/**/*']
}
}
},
simplemocha: {
options: {
reporter: 'list'
},
all: {src: ['test/**/*.js']}
}
});
require('jit-grunt')(grunt, {
'simplemocha': 'grunt-simple-mocha'
});
grunt.registerTask('lint', ['jshint:default']);
grunt.registerTask('test', ['simplemocha']);
grunt.registerTask('default', ['lint', 'test']);
};

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{
"name": "node-rsa",
"version": "1.1.2",
"description": "Node.js RSA library",
"main": "src/NodeRSA.js",
"scripts": {
"test": "grunt test"
},
"repository": {
"type": "git",
"url": "https://github.com/magnusvw/node-rsa.git"
},
"keywords": [
"node",
"rsa",
"crypto",
"assymetric",
"encryption",
"decryption",
"sign",
"verify",
"pkcs1",
"oaep",
"pss"
],
"author": "rzcoder",
"license": "MIT",
"bugs": {
"url": "https://github.com/magnusvw/node-rsa/issues"
},
"homepage": "https://github.com/magnusvw/node-rsa",
"devDependencies": {
"chai": "^4.2.0",
"grunt": "^1.1.0",
"grunt-contrib-jshint": "^2.1.0",
"grunt-simple-mocha": "0.4.1",
"jit-grunt": "0.10.0",
"lodash": "^4.17.15",
"nyc": "^15.0.0"
},
"dependencies": {
"asn1": "^0.2.4"
}
}

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/*!
* RSA library for Node.js
*
* Author: rzcoder
* License MIT
*/
var constants = require('constants');
var rsa = require('./libs/rsa.js');
var _ = require('./utils')._;
var utils = require('./utils');
var schemes = require('./schemes/schemes.js');
var formats = require('./formats/formats.js');
if (typeof constants.RSA_NO_PADDING === "undefined") {
//patch for node v0.10.x, constants do not defined
constants.RSA_NO_PADDING = 3;
}
module.exports = (function () {
var SUPPORTED_HASH_ALGORITHMS = {
node10: ['md4', 'md5', 'ripemd160', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512'],
node: ['md4', 'md5', 'ripemd160', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512'],
iojs: ['md4', 'md5', 'ripemd160', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512'],
browser: ['md5', 'ripemd160', 'sha1', 'sha256', 'sha512']
};
var DEFAULT_ENCRYPTION_SCHEME = 'pkcs1_oaep';
var DEFAULT_SIGNING_SCHEME = 'pkcs1';
var DEFAULT_EXPORT_FORMAT = 'private';
var EXPORT_FORMAT_ALIASES = {
'private': 'pkcs1-private-pem',
'private-der': 'pkcs1-private-der',
'public': 'pkcs8-public-pem',
'public-der': 'pkcs8-public-der',
};
/**
* @param key {string|buffer|object} Key in PEM format, or data for generate key {b: bits, e: exponent}
* @constructor
*/
function NodeRSA(key, format, options) {
if (!(this instanceof NodeRSA)) {
return new NodeRSA(key, format, options);
}
if (_.isObject(format)) {
options = format;
format = undefined;
}
this.$options = {
signingScheme: DEFAULT_SIGNING_SCHEME,
signingSchemeOptions: {
hash: 'sha256',
saltLength: null
},
encryptionScheme: DEFAULT_ENCRYPTION_SCHEME,
encryptionSchemeOptions: {
hash: 'sha1',
label: null
},
environment: utils.detectEnvironment(),
rsaUtils: this
};
this.keyPair = new rsa.Key();
this.$cache = {};
if (Buffer.isBuffer(key) || _.isString(key)) {
this.importKey(key, format);
} else if (_.isObject(key)) {
this.generateKeyPair(key.b, key.e);
}
this.setOptions(options);
}
/**
* Set and validate options for key instance
* @param options
*/
NodeRSA.prototype.setOptions = function (options) {
options = options || {};
if (options.environment) {
this.$options.environment = options.environment;
}
if (options.signingScheme) {
if (_.isString(options.signingScheme)) {
var signingScheme = options.signingScheme.toLowerCase().split('-');
if (signingScheme.length == 1) {
if (SUPPORTED_HASH_ALGORITHMS.node.indexOf(signingScheme[0]) > -1) {
this.$options.signingSchemeOptions = {
hash: signingScheme[0]
};
this.$options.signingScheme = DEFAULT_SIGNING_SCHEME;
} else {
this.$options.signingScheme = signingScheme[0];
this.$options.signingSchemeOptions = {
hash: null
};
}
} else {
this.$options.signingSchemeOptions = {
hash: signingScheme[1]
};
this.$options.signingScheme = signingScheme[0];
}
} else if (_.isObject(options.signingScheme)) {
this.$options.signingScheme = options.signingScheme.scheme || DEFAULT_SIGNING_SCHEME;
this.$options.signingSchemeOptions = _.omit(options.signingScheme, 'scheme');
}
if (!schemes.isSignature(this.$options.signingScheme)) {
throw Error('Unsupported signing scheme');
}
if (this.$options.signingSchemeOptions.hash &&
SUPPORTED_HASH_ALGORITHMS[this.$options.environment].indexOf(this.$options.signingSchemeOptions.hash) === -1) {
throw Error('Unsupported hashing algorithm for ' + this.$options.environment + ' environment');
}
}
if (options.encryptionScheme) {
if (_.isString(options.encryptionScheme)) {
this.$options.encryptionScheme = options.encryptionScheme.toLowerCase();
this.$options.encryptionSchemeOptions = {};
} else if (_.isObject(options.encryptionScheme)) {
this.$options.encryptionScheme = options.encryptionScheme.scheme || DEFAULT_ENCRYPTION_SCHEME;
this.$options.encryptionSchemeOptions = _.omit(options.encryptionScheme, 'scheme');
}
if (!schemes.isEncryption(this.$options.encryptionScheme)) {
throw Error('Unsupported encryption scheme');
}
if (this.$options.encryptionSchemeOptions.hash &&
SUPPORTED_HASH_ALGORITHMS[this.$options.environment].indexOf(this.$options.encryptionSchemeOptions.hash) === -1) {
throw Error('Unsupported hashing algorithm for ' + this.$options.environment + ' environment');
}
}
this.keyPair.setOptions(this.$options);
};
/**
* Generate private/public keys pair
*
* @param bits {int} length key in bits. Default 2048.
* @param exp {int} public exponent. Default 65537.
* @returns {NodeRSA}
*/
NodeRSA.prototype.generateKeyPair = function (bits, exp) {
bits = bits || 2048;
exp = exp || 65537;
if (bits % 8 !== 0) {
throw Error('Key size must be a multiple of 8.');
}
this.keyPair.generate(bits, exp.toString(16));
this.$cache = {};
return this;
};
/**
* Importing key
* @param keyData {string|buffer|Object}
* @param format {string}
*/
NodeRSA.prototype.importKey = function (keyData, format) {
if (!keyData) {
throw Error("Empty key given");
}
if (format) {
format = EXPORT_FORMAT_ALIASES[format] || format;
}
if (!formats.detectAndImport(this.keyPair, keyData, format) && format === undefined) {
throw Error("Key format must be specified");
}
this.$cache = {};
return this;
};
/**
* Exporting key
* @param [format] {string}
*/
NodeRSA.prototype.exportKey = function (format) {
format = format || DEFAULT_EXPORT_FORMAT;
format = EXPORT_FORMAT_ALIASES[format] || format;
if (!this.$cache[format]) {
this.$cache[format] = formats.detectAndExport(this.keyPair, format);
}
return this.$cache[format];
};
/**
* Check if key pair contains private key
*/
NodeRSA.prototype.isPrivate = function () {
return this.keyPair.isPrivate();
};
/**
* Check if key pair contains public key
* @param [strict] {boolean} - public key only, return false if have private exponent
*/
NodeRSA.prototype.isPublic = function (strict) {
return this.keyPair.isPublic(strict);
};
/**
* Check if key pair doesn't contains any data
*/
NodeRSA.prototype.isEmpty = function (strict) {
return !(this.keyPair.n || this.keyPair.e || this.keyPair.d);
};
/**
* Encrypting data method with public key
*
* @param buffer {string|number|object|array|Buffer} - data for encrypting. Object and array will convert to JSON string.
* @param encoding {string} - optional. Encoding for output result, may be 'buffer', 'binary', 'hex' or 'base64'. Default 'buffer'.
* @param source_encoding {string} - optional. Encoding for given string. Default utf8.
* @returns {string|Buffer}
*/
NodeRSA.prototype.encrypt = function (buffer, encoding, source_encoding) {
return this.$$encryptKey(false, buffer, encoding, source_encoding);
};
/**
* Decrypting data method with private key
*
* @param buffer {Buffer} - buffer for decrypting
* @param encoding - encoding for result string, can also take 'json' or 'buffer' for the automatic conversion of this type
* @returns {Buffer|object|string}
*/
NodeRSA.prototype.decrypt = function (buffer, encoding) {
return this.$$decryptKey(false, buffer, encoding);
};
/**
* Encrypting data method with private key
*
* Parameters same as `encrypt` method
*/
NodeRSA.prototype.encryptPrivate = function (buffer, encoding, source_encoding) {
return this.$$encryptKey(true, buffer, encoding, source_encoding);
};
/**
* Decrypting data method with public key
*
* Parameters same as `decrypt` method
*/
NodeRSA.prototype.decryptPublic = function (buffer, encoding) {
return this.$$decryptKey(true, buffer, encoding);
};
/**
* Encrypting data method with custom key
*/
NodeRSA.prototype.$$encryptKey = function (usePrivate, buffer, encoding, source_encoding) {
try {
var res = this.keyPair.encrypt(this.$getDataForEncrypt(buffer, source_encoding), usePrivate);
if (encoding == 'buffer' || !encoding) {
return res;
} else {
return res.toString(encoding);
}
} catch (e) {
throw Error('Error during encryption. Original error: ' + e);
}
};
/**
* Decrypting data method with custom key
*/
NodeRSA.prototype.$$decryptKey = function (usePublic, buffer, encoding) {
try {
buffer = _.isString(buffer) ? Buffer.from(buffer, 'base64') : buffer;
var res = this.keyPair.decrypt(buffer, usePublic);
if (res === null) {
throw Error('Key decrypt method returns null.');
}
return this.$getDecryptedData(res, encoding);
} catch (e) {
throw Error('Error during decryption (probably incorrect key). Original error: ' + e);
}
};
/**
* Signing data
*
* @param buffer {string|number|object|array|Buffer} - data for signing. Object and array will convert to JSON string.
* @param encoding {string} - optional. Encoding for output result, may be 'buffer', 'binary', 'hex' or 'base64'. Default 'buffer'.
* @param source_encoding {string} - optional. Encoding for given string. Default utf8.
* @returns {string|Buffer}
*/
NodeRSA.prototype.sign = function (buffer, encoding, source_encoding) {
if (!this.isPrivate()) {
throw Error("This is not private key");
}
var res = this.keyPair.sign(this.$getDataForEncrypt(buffer, source_encoding));
if (encoding && encoding != 'buffer') {
res = res.toString(encoding);
}
return res;
};
/**
* Verifying signed data
*
* @param buffer - signed data
* @param signature
* @param source_encoding {string} - optional. Encoding for given string. Default utf8.
* @param signature_encoding - optional. Encoding of given signature. May be 'buffer', 'binary', 'hex' or 'base64'. Default 'buffer'.
* @returns {*}
*/
NodeRSA.prototype.verify = function (buffer, signature, source_encoding, signature_encoding) {
if (!this.isPublic()) {
throw Error("This is not public key");
}
signature_encoding = (!signature_encoding || signature_encoding == 'buffer' ? null : signature_encoding);
return this.keyPair.verify(this.$getDataForEncrypt(buffer, source_encoding), signature, signature_encoding);
};
/**
* Returns key size in bits
* @returns {int}
*/
NodeRSA.prototype.getKeySize = function () {
return this.keyPair.keySize;
};
/**
* Returns max message length in bytes (for 1 chunk) depending on current encryption scheme
* @returns {int}
*/
NodeRSA.prototype.getMaxMessageSize = function () {
return this.keyPair.maxMessageLength;
};
/**
* Preparing given data for encrypting/signing. Just make new/return Buffer object.
*
* @param buffer {string|number|object|array|Buffer} - data for encrypting. Object and array will convert to JSON string.
* @param encoding {string} - optional. Encoding for given string. Default utf8.
* @returns {Buffer}
*/
NodeRSA.prototype.$getDataForEncrypt = function (buffer, encoding) {
if (_.isString(buffer) || _.isNumber(buffer)) {
return Buffer.from('' + buffer, encoding || 'utf8');
} else if (Buffer.isBuffer(buffer)) {
return buffer;
} else if (_.isObject(buffer)) {
return Buffer.from(JSON.stringify(buffer));
} else {
throw Error("Unexpected data type");
}
};
/**
*
* @param buffer {Buffer} - decrypted data.
* @param encoding - optional. Encoding for result output. May be 'buffer', 'json' or any of Node.js Buffer supported encoding.
* @returns {*}
*/
NodeRSA.prototype.$getDecryptedData = function (buffer, encoding) {
encoding = encoding || 'buffer';
if (encoding == 'buffer') {
return buffer;
} else if (encoding == 'json') {
return JSON.parse(buffer.toString());
} else {
return buffer.toString(encoding);
}
};
return NodeRSA;
})();

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var crypt = require('crypto');
module.exports = {
getEngine: function (keyPair, options) {
var engine = require('./js.js');
if (options.environment === 'node') {
if (typeof crypt.publicEncrypt === 'function' && typeof crypt.privateDecrypt === 'function') {
if (typeof crypt.privateEncrypt === 'function' && typeof crypt.publicDecrypt === 'function') {
engine = require('./io.js');
} else {
engine = require('./node12.js');
}
}
}
return engine(keyPair, options);
}
};

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var crypto = require('crypto');
var constants = require('constants');
var schemes = require('../schemes/schemes.js');
module.exports = function (keyPair, options) {
var pkcs1Scheme = schemes.pkcs1.makeScheme(keyPair, options);
return {
encrypt: function (buffer, usePrivate) {
var padding;
if (usePrivate) {
padding = constants.RSA_PKCS1_PADDING;
if (options.encryptionSchemeOptions && options.encryptionSchemeOptions.padding) {
padding = options.encryptionSchemeOptions.padding;
}
return crypto.privateEncrypt({
key: options.rsaUtils.exportKey('private'),
padding: padding
}, buffer);
} else {
padding = constants.RSA_PKCS1_OAEP_PADDING;
if (options.encryptionScheme === 'pkcs1') {
padding = constants.RSA_PKCS1_PADDING;
}
if (options.encryptionSchemeOptions && options.encryptionSchemeOptions.padding) {
padding = options.encryptionSchemeOptions.padding;
}
var data = buffer;
if (padding === constants.RSA_NO_PADDING) {
data = pkcs1Scheme.pkcs0pad(buffer);
}
return crypto.publicEncrypt({
key: options.rsaUtils.exportKey('public'),
padding: padding
}, data);
}
},
decrypt: function (buffer, usePublic) {
var padding;
if (usePublic) {
padding = constants.RSA_PKCS1_PADDING;
if (options.encryptionSchemeOptions && options.encryptionSchemeOptions.padding) {
padding = options.encryptionSchemeOptions.padding;
}
return crypto.publicDecrypt({
key: options.rsaUtils.exportKey('public'),
padding: padding
}, buffer);
} else {
padding = constants.RSA_PKCS1_OAEP_PADDING;
if (options.encryptionScheme === 'pkcs1') {
padding = constants.RSA_PKCS1_PADDING;
}
if (options.encryptionSchemeOptions && options.encryptionSchemeOptions.padding) {
padding = options.encryptionSchemeOptions.padding;
}
var res = crypto.privateDecrypt({
key: options.rsaUtils.exportKey('private'),
padding: padding
}, buffer);
if (padding === constants.RSA_NO_PADDING) {
return pkcs1Scheme.pkcs0unpad(res);
}
return res;
}
}
};
};

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var BigInteger = require('../libs/jsbn.js');
var schemes = require('../schemes/schemes.js');
module.exports = function (keyPair, options) {
var pkcs1Scheme = schemes.pkcs1.makeScheme(keyPair, options);
return {
encrypt: function (buffer, usePrivate) {
var m, c;
if (usePrivate) {
/* Type 1: zeros padding for private key encrypt */
m = new BigInteger(pkcs1Scheme.encPad(buffer, {type: 1}));
c = keyPair.$doPrivate(m);
} else {
m = new BigInteger(keyPair.encryptionScheme.encPad(buffer));
c = keyPair.$doPublic(m);
}
return c.toBuffer(keyPair.encryptedDataLength);
},
decrypt: function (buffer, usePublic) {
var m, c = new BigInteger(buffer);
if (usePublic) {
m = keyPair.$doPublic(c);
/* Type 1: zeros padding for private key decrypt */
return pkcs1Scheme.encUnPad(m.toBuffer(keyPair.encryptedDataLength), {type: 1});
} else {
m = keyPair.$doPrivate(c);
return keyPair.encryptionScheme.encUnPad(m.toBuffer(keyPair.encryptedDataLength));
}
}
};
};

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var crypto = require('crypto');
var constants = require('constants');
var schemes = require('../schemes/schemes.js');
module.exports = function (keyPair, options) {
var jsEngine = require('./js.js')(keyPair, options);
var pkcs1Scheme = schemes.pkcs1.makeScheme(keyPair, options);
return {
encrypt: function (buffer, usePrivate) {
if (usePrivate) {
return jsEngine.encrypt(buffer, usePrivate);
}
var padding = constants.RSA_PKCS1_OAEP_PADDING;
if (options.encryptionScheme === 'pkcs1') {
padding = constants.RSA_PKCS1_PADDING;
}
if (options.encryptionSchemeOptions && options.encryptionSchemeOptions.padding) {
padding = options.encryptionSchemeOptions.padding;
}
var data = buffer;
if (padding === constants.RSA_NO_PADDING) {
data = pkcs1Scheme.pkcs0pad(buffer);
}
return crypto.publicEncrypt({
key: options.rsaUtils.exportKey('public'),
padding: padding
}, data);
},
decrypt: function (buffer, usePublic) {
if (usePublic) {
return jsEngine.decrypt(buffer, usePublic);
}
var padding = constants.RSA_PKCS1_OAEP_PADDING;
if (options.encryptionScheme === 'pkcs1') {
padding = constants.RSA_PKCS1_PADDING;
}
if (options.encryptionSchemeOptions && options.encryptionSchemeOptions.padding) {
padding = options.encryptionSchemeOptions.padding;
}
var res = crypto.privateDecrypt({
key: options.rsaUtils.exportKey('private'),
padding: padding
}, buffer);
if (padding === constants.RSA_NO_PADDING) {
return pkcs1Scheme.pkcs0unpad(res);
}
return res;
}
};
};

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var _ = require('../utils')._;
var utils = require('../utils');
module.exports = {
privateExport: function (key, options) {
return {
n: key.n.toBuffer(),
e: key.e,
d: key.d.toBuffer(),
p: key.p.toBuffer(),
q: key.q.toBuffer(),
dmp1: key.dmp1.toBuffer(),
dmq1: key.dmq1.toBuffer(),
coeff: key.coeff.toBuffer()
};
},
privateImport: function (key, data, options) {
if (data.n && data.e && data.d && data.p && data.q && data.dmp1 && data.dmq1 && data.coeff) {
key.setPrivate(
data.n,
data.e,
data.d,
data.p,
data.q,
data.dmp1,
data.dmq1,
data.coeff
);
} else {
throw Error("Invalid key data");
}
},
publicExport: function (key, options) {
return {
n: key.n.toBuffer(),
e: key.e
};
},
publicImport: function (key, data, options) {
if (data.n && data.e) {
key.setPublic(
data.n,
data.e
);
} else {
throw Error("Invalid key data");
}
},
/**
* Trying autodetect and import key
* @param key
* @param data
*/
autoImport: function (key, data) {
if (data.n && data.e) {
if (data.d && data.p && data.q && data.dmp1 && data.dmq1 && data.coeff) {
module.exports.privateImport(key, data);
return true;
} else {
module.exports.publicImport(key, data);
return true;
}
}
return false;
}
};

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var _ = require('../utils')._;
function formatParse(format) {
format = format.split('-');
var keyType = 'private';
var keyOpt = {type: 'default'};
for (var i = 1; i < format.length; i++) {
if (format[i]) {
switch (format[i]) {
case 'public':
keyType = format[i];
break;
case 'private':
keyType = format[i];
break;
case 'pem':
keyOpt.type = format[i];
break;
case 'der':
keyOpt.type = format[i];
break;
}
}
}
return {scheme: format[0], keyType: keyType, keyOpt: keyOpt};
}
module.exports = {
pkcs1: require('./pkcs1'),
pkcs8: require('./pkcs8'),
components: require('./components'),
openssh: require('./openssh'),
isPrivateExport: function (format) {
return module.exports[format] && typeof module.exports[format].privateExport === 'function';
},
isPrivateImport: function (format) {
return module.exports[format] && typeof module.exports[format].privateImport === 'function';
},
isPublicExport: function (format) {
return module.exports[format] && typeof module.exports[format].publicExport === 'function';
},
isPublicImport: function (format) {
return module.exports[format] && typeof module.exports[format].publicImport === 'function';
},
detectAndImport: function (key, data, format) {
if (format === undefined) {
for (var scheme in module.exports) {
if (typeof module.exports[scheme].autoImport === 'function' && module.exports[scheme].autoImport(key, data)) {
return true;
}
}
} else if (format) {
var fmt = formatParse(format);
if (module.exports[fmt.scheme]) {
if (fmt.keyType === 'private') {
module.exports[fmt.scheme].privateImport(key, data, fmt.keyOpt);
} else {
module.exports[fmt.scheme].publicImport(key, data, fmt.keyOpt);
}
} else {
throw Error('Unsupported key format');
}
}
return false;
},
detectAndExport: function (key, format) {
if (format) {
var fmt = formatParse(format);
if (module.exports[fmt.scheme]) {
if (fmt.keyType === 'private') {
if (!key.isPrivate()) {
throw Error("This is not private key");
}
return module.exports[fmt.scheme].privateExport(key, fmt.keyOpt);
} else {
if (!key.isPublic()) {
throw Error("This is not public key");
}
return module.exports[fmt.scheme].publicExport(key, fmt.keyOpt);
}
} else {
throw Error('Unsupported key format');
}
}
}
};

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var _ = require("../utils")._;
var utils = require("../utils");
var BigInteger = require("../libs/jsbn");
const PRIVATE_OPENING_BOUNDARY = "-----BEGIN OPENSSH PRIVATE KEY-----";
const PRIVATE_CLOSING_BOUNDARY = "-----END OPENSSH PRIVATE KEY-----";
module.exports = {
privateExport: function (key, options) {
const nbuf = key.n.toBuffer();
let ebuf = Buffer.alloc(4)
ebuf.writeUInt32BE(key.e, 0);
//Slice leading zeroes
while (ebuf[0] === 0) ebuf = ebuf.slice(1);
const dbuf = key.d.toBuffer();
const coeffbuf = key.coeff.toBuffer();
const pbuf = key.p.toBuffer();
const qbuf = key.q.toBuffer();
let commentbuf;
if (typeof key.sshcomment !== "undefined") {
commentbuf = Buffer.from(key.sshcomment);
} else {
commentbuf = Buffer.from([]);
}
const pubkeyLength =
11 + // 32bit length, 'ssh-rsa'
4 + ebuf.byteLength +
4 + nbuf.byteLength;
const privateKeyLength =
8 + //64bit unused checksum
11 + // 32bit length, 'ssh-rsa'
4 + nbuf.byteLength +
4 + ebuf.byteLength +
4 + dbuf.byteLength +
4 + coeffbuf.byteLength +
4 + pbuf.byteLength +
4 + qbuf.byteLength +
4 + commentbuf.byteLength;
let length =
15 + //openssh-key-v1,0x00,
16 + // 2*(32bit length, 'none')
4 + // 32bit length, empty string
4 + // 32bit number of keys
4 + // 32bit pubkey length
pubkeyLength +
4 + //32bit private+checksum+comment+padding length
privateKeyLength;
const paddingLength = Math.ceil(privateKeyLength / 8) * 8 - privateKeyLength;
length += paddingLength;
const buf = Buffer.alloc(length);
const writer = {buf: buf, off: 0};
buf.write("openssh-key-v1", "utf8");
buf.writeUInt8(0, 14);
writer.off += 15;
writeOpenSSHKeyString(writer, Buffer.from("none"));
writeOpenSSHKeyString(writer, Buffer.from("none"));
writeOpenSSHKeyString(writer, Buffer.from(""));
writer.off = writer.buf.writeUInt32BE(1, writer.off);
writer.off = writer.buf.writeUInt32BE(pubkeyLength, writer.off);
writeOpenSSHKeyString(writer, Buffer.from("ssh-rsa"));
writeOpenSSHKeyString(writer, ebuf);
writeOpenSSHKeyString(writer, nbuf);
writer.off = writer.buf.writeUInt32BE(
length - 47 - pubkeyLength,
writer.off
);
writer.off += 8;
writeOpenSSHKeyString(writer, Buffer.from("ssh-rsa"));
writeOpenSSHKeyString(writer, nbuf);
writeOpenSSHKeyString(writer, ebuf);
writeOpenSSHKeyString(writer, dbuf);
writeOpenSSHKeyString(writer, coeffbuf);
writeOpenSSHKeyString(writer, pbuf);
writeOpenSSHKeyString(writer, qbuf);
writeOpenSSHKeyString(writer, commentbuf);
let pad = 0x01;
while (writer.off < length) {
writer.off = writer.buf.writeUInt8(pad++, writer.off);
}
if (options.type === "der") {
return writer.buf
} else {
return PRIVATE_OPENING_BOUNDARY + "\n" + utils.linebrk(buf.toString("base64"), 70) + "\n" + PRIVATE_CLOSING_BOUNDARY + "\n";
}
},
privateImport: function (key, data, options) {
options = options || {};
var buffer;
if (options.type !== "der") {
if (Buffer.isBuffer(data)) {
data = data.toString("utf8");
}
if (_.isString(data)) {
var pem = utils.trimSurroundingText(data, PRIVATE_OPENING_BOUNDARY, PRIVATE_CLOSING_BOUNDARY)
.replace(/\s+|\n\r|\n|\r$/gm, "");
buffer = Buffer.from(pem, "base64");
} else {
throw Error("Unsupported key format");
}
} else if (Buffer.isBuffer(data)) {
buffer = data;
} else {
throw Error("Unsupported key format");
}
const reader = {buf: buffer, off: 0};
if (buffer.slice(0, 14).toString("ascii") !== "openssh-key-v1")
throw "Invalid file format.";
reader.off += 15;
//ciphername
if (readOpenSSHKeyString(reader).toString("ascii") !== "none")
throw Error("Unsupported key type");
//kdfname
if (readOpenSSHKeyString(reader).toString("ascii") !== "none")
throw Error("Unsupported key type");
//kdf
if (readOpenSSHKeyString(reader).toString("ascii") !== "")
throw Error("Unsupported key type");
//keynum
reader.off += 4;
//sshpublength
reader.off += 4;
//keytype
if (readOpenSSHKeyString(reader).toString("ascii") !== "ssh-rsa")
throw Error("Unsupported key type");
readOpenSSHKeyString(reader);
readOpenSSHKeyString(reader);
reader.off += 12;
if (readOpenSSHKeyString(reader).toString("ascii") !== "ssh-rsa")
throw Error("Unsupported key type");
const n = readOpenSSHKeyString(reader);
const e = readOpenSSHKeyString(reader);
const d = readOpenSSHKeyString(reader);
const coeff = readOpenSSHKeyString(reader);
const p = readOpenSSHKeyString(reader);
const q = readOpenSSHKeyString(reader);
//Calculate missing values
const dint = new BigInteger(d);
const qint = new BigInteger(q);
const pint = new BigInteger(p);
const dp = dint.mod(pint.subtract(BigInteger.ONE));
const dq = dint.mod(qint.subtract(BigInteger.ONE));
key.setPrivate(
n, // modulus
e, // publicExponent
d, // privateExponent
p, // prime1
q, // prime2
dp.toBuffer(), // exponent1 -- d mod (p1)
dq.toBuffer(), // exponent2 -- d mod (q-1)
coeff // coefficient -- (inverse of q) mod p
);
key.sshcomment = readOpenSSHKeyString(reader).toString("ascii");
},
publicExport: function (key, options) {
let ebuf = Buffer.alloc(4)
ebuf.writeUInt32BE(key.e, 0);
//Slice leading zeroes
while (ebuf[0] === 0) ebuf = ebuf.slice(1);
const nbuf = key.n.toBuffer();
const buf = Buffer.alloc(
ebuf.byteLength + 4 +
nbuf.byteLength + 4 +
"ssh-rsa".length + 4
);
const writer = {buf: buf, off: 0};
writeOpenSSHKeyString(writer, Buffer.from("ssh-rsa"));
writeOpenSSHKeyString(writer, ebuf);
writeOpenSSHKeyString(writer, nbuf);
let comment = key.sshcomment || "";
if (options.type === "der") {
return writer.buf
} else {
return "ssh-rsa " + buf.toString("base64") + " " + comment + "\n";
}
},
publicImport: function (key, data, options) {
options = options || {};
var buffer;
if (options.type !== "der") {
if (Buffer.isBuffer(data)) {
data = data.toString("utf8");
}
if (_.isString(data)) {
if (data.substring(0, 8) !== "ssh-rsa ")
throw Error("Unsupported key format");
let pemEnd = data.indexOf(" ", 8);
//Handle keys with no comment
if (pemEnd === -1) {
pemEnd = data.length;
} else {
key.sshcomment = data.substring(pemEnd + 1)
.replace(/\s+|\n\r|\n|\r$/gm, "");
}
const pem = data.substring(8, pemEnd)
.replace(/\s+|\n\r|\n|\r$/gm, "");
buffer = Buffer.from(pem, "base64");
} else {
throw Error("Unsupported key format");
}
} else if (Buffer.isBuffer(data)) {
buffer = data;
} else {
throw Error("Unsupported key format");
}
const reader = {buf: buffer, off: 0};
const type = readOpenSSHKeyString(reader).toString("ascii");
if (type !== "ssh-rsa")
throw Error("Invalid key type: " + type);
const e = readOpenSSHKeyString(reader);
const n = readOpenSSHKeyString(reader);
key.setPublic(
n,
e
);
},
/**
* Trying autodetect and import key
* @param key
* @param data
*/
autoImport: function (key, data) {
// [\S\s]* matches zero or more of any character
if (/^[\S\s]*-----BEGIN OPENSSH PRIVATE KEY-----\s*(?=(([A-Za-z0-9+/=]+\s*)+))\1-----END OPENSSH PRIVATE KEY-----[\S\s]*$/g.test(data)) {
module.exports.privateImport(key, data);
return true;
}
if (/^[\S\s]*ssh-rsa \s*(?=(([A-Za-z0-9+/=]+\s*)+))\1[\S\s]*$/g.test(data)) {
module.exports.publicImport(key, data);
return true;
}
return false;
}
};
function readOpenSSHKeyString(reader) {
const len = reader.buf.readInt32BE(reader.off);
reader.off += 4;
const res = reader.buf.slice(reader.off, reader.off + len);
reader.off += len;
return res;
}
function writeOpenSSHKeyString(writer, data) {
writer.buf.writeInt32BE(data.byteLength, writer.off);
writer.off += 4;
writer.off += data.copy(writer.buf, writer.off);
}

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var ber = require('asn1').Ber;
var _ = require('../utils')._;
var utils = require('../utils');
const PRIVATE_OPENING_BOUNDARY = '-----BEGIN RSA PRIVATE KEY-----';
const PRIVATE_CLOSING_BOUNDARY = '-----END RSA PRIVATE KEY-----';
const PUBLIC_OPENING_BOUNDARY = '-----BEGIN RSA PUBLIC KEY-----';
const PUBLIC_CLOSING_BOUNDARY = '-----END RSA PUBLIC KEY-----';
module.exports = {
privateExport: function (key, options) {
options = options || {};
var n = key.n.toBuffer();
var d = key.d.toBuffer();
var p = key.p.toBuffer();
var q = key.q.toBuffer();
var dmp1 = key.dmp1.toBuffer();
var dmq1 = key.dmq1.toBuffer();
var coeff = key.coeff.toBuffer();
var length = n.length + d.length + p.length + q.length + dmp1.length + dmq1.length + coeff.length + 512; // magic
var writer = new ber.Writer({size: length});
writer.startSequence();
writer.writeInt(0);
writer.writeBuffer(n, 2);
writer.writeInt(key.e);
writer.writeBuffer(d, 2);
writer.writeBuffer(p, 2);
writer.writeBuffer(q, 2);
writer.writeBuffer(dmp1, 2);
writer.writeBuffer(dmq1, 2);
writer.writeBuffer(coeff, 2);
writer.endSequence();
if (options.type === 'der') {
return writer.buffer;
} else {
return PRIVATE_OPENING_BOUNDARY + '\n' + utils.linebrk(writer.buffer.toString('base64'), 64) + '\n' + PRIVATE_CLOSING_BOUNDARY;
}
},
privateImport: function (key, data, options) {
options = options || {};
var buffer;
if (options.type !== 'der') {
if (Buffer.isBuffer(data)) {
data = data.toString('utf8');
}
if (_.isString(data)) {
var pem = utils.trimSurroundingText(data, PRIVATE_OPENING_BOUNDARY, PRIVATE_CLOSING_BOUNDARY)
.replace(/\s+|\n\r|\n|\r$/gm, '');
buffer = Buffer.from(pem, 'base64');
} else {
throw Error('Unsupported key format');
}
} else if (Buffer.isBuffer(data)) {
buffer = data;
} else {
throw Error('Unsupported key format');
}
var reader = new ber.Reader(buffer);
reader.readSequence();
reader.readString(2, true); // just zero
key.setPrivate(
reader.readString(2, true), // modulus
reader.readString(2, true), // publicExponent
reader.readString(2, true), // privateExponent
reader.readString(2, true), // prime1
reader.readString(2, true), // prime2
reader.readString(2, true), // exponent1 -- d mod (p1)
reader.readString(2, true), // exponent2 -- d mod (q-1)
reader.readString(2, true) // coefficient -- (inverse of q) mod p
);
},
publicExport: function (key, options) {
options = options || {};
var n = key.n.toBuffer();
var length = n.length + 512; // magic
var bodyWriter = new ber.Writer({size: length});
bodyWriter.startSequence();
bodyWriter.writeBuffer(n, 2);
bodyWriter.writeInt(key.e);
bodyWriter.endSequence();
if (options.type === 'der') {
return bodyWriter.buffer;
} else {
return PUBLIC_OPENING_BOUNDARY + '\n' + utils.linebrk(bodyWriter.buffer.toString('base64'), 64) + '\n' + PUBLIC_CLOSING_BOUNDARY;
}
},
publicImport: function (key, data, options) {
options = options || {};
var buffer;
if (options.type !== 'der') {
if (Buffer.isBuffer(data)) {
data = data.toString('utf8');
}
if (_.isString(data)) {
var pem = utils.trimSurroundingText(data, PUBLIC_OPENING_BOUNDARY, PUBLIC_CLOSING_BOUNDARY)
.replace(/\s+|\n\r|\n|\r$/gm, '');
buffer = Buffer.from(pem, 'base64');
}
} else if (Buffer.isBuffer(data)) {
buffer = data;
} else {
throw Error('Unsupported key format');
}
var body = new ber.Reader(buffer);
body.readSequence();
key.setPublic(
body.readString(0x02, true), // modulus
body.readString(0x02, true) // publicExponent
);
},
/**
* Trying autodetect and import key
* @param key
* @param data
*/
autoImport: function (key, data) {
// [\S\s]* matches zero or more of any character
if (/^[\S\s]*-----BEGIN RSA PRIVATE KEY-----\s*(?=(([A-Za-z0-9+/=]+\s*)+))\1-----END RSA PRIVATE KEY-----[\S\s]*$/g.test(data)) {
module.exports.privateImport(key, data);
return true;
}
if (/^[\S\s]*-----BEGIN RSA PUBLIC KEY-----\s*(?=(([A-Za-z0-9+/=]+\s*)+))\1-----END RSA PUBLIC KEY-----[\S\s]*$/g.test(data)) {
module.exports.publicImport(key, data);
return true;
}
return false;
}
};

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var ber = require('asn1').Ber;
var _ = require('../utils')._;
var PUBLIC_RSA_OID = '1.2.840.113549.1.1.1';
var utils = require('../utils');
const PRIVATE_OPENING_BOUNDARY = '-----BEGIN PRIVATE KEY-----';
const PRIVATE_CLOSING_BOUNDARY = '-----END PRIVATE KEY-----';
const PUBLIC_OPENING_BOUNDARY = '-----BEGIN PUBLIC KEY-----';
const PUBLIC_CLOSING_BOUNDARY = '-----END PUBLIC KEY-----';
module.exports = {
privateExport: function (key, options) {
options = options || {};
var n = key.n.toBuffer();
var d = key.d.toBuffer();
var p = key.p.toBuffer();
var q = key.q.toBuffer();
var dmp1 = key.dmp1.toBuffer();
var dmq1 = key.dmq1.toBuffer();
var coeff = key.coeff.toBuffer();
var length = n.length + d.length + p.length + q.length + dmp1.length + dmq1.length + coeff.length + 512; // magic
var bodyWriter = new ber.Writer({size: length});
bodyWriter.startSequence();
bodyWriter.writeInt(0);
bodyWriter.writeBuffer(n, 2);
bodyWriter.writeInt(key.e);
bodyWriter.writeBuffer(d, 2);
bodyWriter.writeBuffer(p, 2);
bodyWriter.writeBuffer(q, 2);
bodyWriter.writeBuffer(dmp1, 2);
bodyWriter.writeBuffer(dmq1, 2);
bodyWriter.writeBuffer(coeff, 2);
bodyWriter.endSequence();
var writer = new ber.Writer({size: length});
writer.startSequence();
writer.writeInt(0);
writer.startSequence();
writer.writeOID(PUBLIC_RSA_OID);
writer.writeNull();
writer.endSequence();
writer.writeBuffer(bodyWriter.buffer, 4);
writer.endSequence();
if (options.type === 'der') {
return writer.buffer;
} else {
return PRIVATE_OPENING_BOUNDARY + '\n' + utils.linebrk(writer.buffer.toString('base64'), 64) + '\n' + PRIVATE_CLOSING_BOUNDARY;
}
},
privateImport: function (key, data, options) {
options = options || {};
var buffer;
if (options.type !== 'der') {
if (Buffer.isBuffer(data)) {
data = data.toString('utf8');
}
if (_.isString(data)) {
var pem = utils.trimSurroundingText(data, PRIVATE_OPENING_BOUNDARY, PRIVATE_CLOSING_BOUNDARY)
.replace('-----END PRIVATE KEY-----', '')
.replace(/\s+|\n\r|\n|\r$/gm, '');
buffer = Buffer.from(pem, 'base64');
} else {
throw Error('Unsupported key format');
}
} else if (Buffer.isBuffer(data)) {
buffer = data;
} else {
throw Error('Unsupported key format');
}
var reader = new ber.Reader(buffer);
reader.readSequence();
reader.readInt(0);
var header = new ber.Reader(reader.readString(0x30, true));
if (header.readOID(0x06, true) !== PUBLIC_RSA_OID) {
throw Error('Invalid Public key format');
}
var body = new ber.Reader(reader.readString(0x04, true));
body.readSequence();
body.readString(2, true); // just zero
key.setPrivate(
body.readString(2, true), // modulus
body.readString(2, true), // publicExponent
body.readString(2, true), // privateExponent
body.readString(2, true), // prime1
body.readString(2, true), // prime2
body.readString(2, true), // exponent1 -- d mod (p1)
body.readString(2, true), // exponent2 -- d mod (q-1)
body.readString(2, true) // coefficient -- (inverse of q) mod p
);
},
publicExport: function (key, options) {
options = options || {};
var n = key.n.toBuffer();
var length = n.length + 512; // magic
var bodyWriter = new ber.Writer({size: length});
bodyWriter.writeByte(0);
bodyWriter.startSequence();
bodyWriter.writeBuffer(n, 2);
bodyWriter.writeInt(key.e);
bodyWriter.endSequence();
var writer = new ber.Writer({size: length});
writer.startSequence();
writer.startSequence();
writer.writeOID(PUBLIC_RSA_OID);
writer.writeNull();
writer.endSequence();
writer.writeBuffer(bodyWriter.buffer, 3);
writer.endSequence();
if (options.type === 'der') {
return writer.buffer;
} else {
return PUBLIC_OPENING_BOUNDARY + '\n' + utils.linebrk(writer.buffer.toString('base64'), 64) + '\n' + PUBLIC_CLOSING_BOUNDARY;
}
},
publicImport: function (key, data, options) {
options = options || {};
var buffer;
if (options.type !== 'der') {
if (Buffer.isBuffer(data)) {
data = data.toString('utf8');
}
if (_.isString(data)) {
var pem = utils.trimSurroundingText(data, PUBLIC_OPENING_BOUNDARY, PUBLIC_CLOSING_BOUNDARY)
.replace(/\s+|\n\r|\n|\r$/gm, '');
buffer = Buffer.from(pem, 'base64');
}
} else if (Buffer.isBuffer(data)) {
buffer = data;
} else {
throw Error('Unsupported key format');
}
var reader = new ber.Reader(buffer);
reader.readSequence();
var header = new ber.Reader(reader.readString(0x30, true));
if (header.readOID(0x06, true) !== PUBLIC_RSA_OID) {
throw Error('Invalid Public key format');
}
var body = new ber.Reader(reader.readString(0x03, true));
body.readByte();
body.readSequence();
key.setPublic(
body.readString(0x02, true), // modulus
body.readString(0x02, true) // publicExponent
);
},
/**
* Trying autodetect and import key
* @param key
* @param data
*/
autoImport: function (key, data) {
if (/^[\S\s]*-----BEGIN PRIVATE KEY-----\s*(?=(([A-Za-z0-9+/=]+\s*)+))\1-----END PRIVATE KEY-----[\S\s]*$/g.test(data)) {
module.exports.privateImport(key, data);
return true;
}
if (/^[\S\s]*-----BEGIN PUBLIC KEY-----\s*(?=(([A-Za-z0-9+/=]+\s*)+))\1-----END PUBLIC KEY-----[\S\s]*$/g.test(data)) {
module.exports.publicImport(key, data);
return true;
}
return false;
}
};

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/*
* RSA Encryption / Decryption with PKCS1 v2 Padding.
*
* Copyright (c) 2003-2005 Tom Wu
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
* THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* In addition, the following condition applies:
*
* All redistributions must retain an intact copy of this copyright notice
* and disclaimer.
*/
/*
* Node.js adaptation
* long message support implementation
* signing/verifying
*
* 2014 rzcoder
*/
var _ = require('../utils')._;
var crypt = require('crypto');
var BigInteger = require('./jsbn.js');
var utils = require('../utils.js');
var schemes = require('../schemes/schemes.js');
var encryptEngines = require('../encryptEngines/encryptEngines.js');
exports.BigInteger = BigInteger;
module.exports.Key = (function () {
/**
* RSA key constructor
*
* n - modulus
* e - publicExponent
* d - privateExponent
* p - prime1
* q - prime2
* dmp1 - exponent1 -- d mod (p1)
* dmq1 - exponent2 -- d mod (q-1)
* coeff - coefficient -- (inverse of q) mod p
*/
function RSAKey() {
this.n = null;
this.e = 0;
this.d = null;
this.p = null;
this.q = null;
this.dmp1 = null;
this.dmq1 = null;
this.coeff = null;
}
RSAKey.prototype.setOptions = function (options) {
var signingSchemeProvider = schemes[options.signingScheme];
var encryptionSchemeProvider = schemes[options.encryptionScheme];
if (signingSchemeProvider === encryptionSchemeProvider) {
this.signingScheme = this.encryptionScheme = encryptionSchemeProvider.makeScheme(this, options);
} else {
this.encryptionScheme = encryptionSchemeProvider.makeScheme(this, options);
this.signingScheme = signingSchemeProvider.makeScheme(this, options);
}
this.encryptEngine = encryptEngines.getEngine(this, options);
};
/**
* Generate a new random private key B bits long, using public expt E
* @param B
* @param E
*/
RSAKey.prototype.generate = function (B, E) {
var qs = B >> 1;
this.e = parseInt(E, 16);
var ee = new BigInteger(E, 16);
while (true) {
while (true) {
this.p = new BigInteger(B - qs, 1);
if (this.p.subtract(BigInteger.ONE).gcd(ee).compareTo(BigInteger.ONE) === 0 && this.p.isProbablePrime(10))
break;
}
while (true) {
this.q = new BigInteger(qs, 1);
if (this.q.subtract(BigInteger.ONE).gcd(ee).compareTo(BigInteger.ONE) === 0 && this.q.isProbablePrime(10))
break;
}
if (this.p.compareTo(this.q) <= 0) {
var t = this.p;
this.p = this.q;
this.q = t;
}
var p1 = this.p.subtract(BigInteger.ONE);
var q1 = this.q.subtract(BigInteger.ONE);
var phi = p1.multiply(q1);
if (phi.gcd(ee).compareTo(BigInteger.ONE) === 0) {
this.n = this.p.multiply(this.q);
if (this.n.bitLength() < B) {
continue;
}
this.d = ee.modInverse(phi);
this.dmp1 = this.d.mod(p1);
this.dmq1 = this.d.mod(q1);
this.coeff = this.q.modInverse(this.p);
break;
}
}
this.$$recalculateCache();
};
/**
* Set the private key fields N, e, d and CRT params from buffers
*
* @param N
* @param E
* @param D
* @param P
* @param Q
* @param DP
* @param DQ
* @param C
*/
RSAKey.prototype.setPrivate = function (N, E, D, P, Q, DP, DQ, C) {
if (N && E && D && N.length > 0 && (_.isNumber(E) || E.length > 0) && D.length > 0) {
this.n = new BigInteger(N);
this.e = _.isNumber(E) ? E : utils.get32IntFromBuffer(E, 0);
this.d = new BigInteger(D);
if (P && Q && DP && DQ && C) {
this.p = new BigInteger(P);
this.q = new BigInteger(Q);
this.dmp1 = new BigInteger(DP);
this.dmq1 = new BigInteger(DQ);
this.coeff = new BigInteger(C);
} else {
// TODO: re-calculate any missing CRT params
}
this.$$recalculateCache();
} else {
throw Error("Invalid RSA private key");
}
};
/**
* Set the public key fields N and e from hex strings
* @param N
* @param E
*/
RSAKey.prototype.setPublic = function (N, E) {
if (N && E && N.length > 0 && (_.isNumber(E) || E.length > 0)) {
this.n = new BigInteger(N);
this.e = _.isNumber(E) ? E : utils.get32IntFromBuffer(E, 0);
this.$$recalculateCache();
} else {
throw Error("Invalid RSA public key");
}
};
/**
* private
* Perform raw private operation on "x": return x^d (mod n)
*
* @param x
* @returns {*}
*/
RSAKey.prototype.$doPrivate = function (x) {
if (this.p || this.q) {
return x.modPow(this.d, this.n);
}
// TODO: re-calculate any missing CRT params
var xp = x.mod(this.p).modPow(this.dmp1, this.p);
var xq = x.mod(this.q).modPow(this.dmq1, this.q);
while (xp.compareTo(xq) < 0) {
xp = xp.add(this.p);
}
return xp.subtract(xq).multiply(this.coeff).mod(this.p).multiply(this.q).add(xq);
};
/**
* private
* Perform raw public operation on "x": return x^e (mod n)
*
* @param x
* @returns {*}
*/
RSAKey.prototype.$doPublic = function (x) {
return x.modPowInt(this.e, this.n);
};
/**
* Return the PKCS#1 RSA encryption of buffer
* @param buffer {Buffer}
* @returns {Buffer}
*/
RSAKey.prototype.encrypt = function (buffer, usePrivate) {
var buffers = [];
var results = [];
var bufferSize = buffer.length;
var buffersCount = Math.ceil(bufferSize / this.maxMessageLength) || 1; // total buffers count for encrypt
var dividedSize = Math.ceil(bufferSize / buffersCount || 1); // each buffer size
if (buffersCount == 1) {
buffers.push(buffer);
} else {
for (var bufNum = 0; bufNum < buffersCount; bufNum++) {
buffers.push(buffer.slice(bufNum * dividedSize, (bufNum + 1) * dividedSize));
}
}
for (var i = 0; i < buffers.length; i++) {
results.push(this.encryptEngine.encrypt(buffers[i], usePrivate));
}
return Buffer.concat(results);
};
/**
* Return the PKCS#1 RSA decryption of buffer
* @param buffer {Buffer}
* @returns {Buffer}
*/
RSAKey.prototype.decrypt = function (buffer, usePublic) {
if (buffer.length % this.encryptedDataLength > 0) {
throw Error('Incorrect data or key');
}
var result = [];
var offset = 0;
var length = 0;
var buffersCount = buffer.length / this.encryptedDataLength;
for (var i = 0; i < buffersCount; i++) {
offset = i * this.encryptedDataLength;
length = offset + this.encryptedDataLength;
result.push(this.encryptEngine.decrypt(buffer.slice(offset, Math.min(length, buffer.length)), usePublic));
}
return Buffer.concat(result);
};
RSAKey.prototype.sign = function (buffer) {
return this.signingScheme.sign.apply(this.signingScheme, arguments);
};
RSAKey.prototype.verify = function (buffer, signature, signature_encoding) {
return this.signingScheme.verify.apply(this.signingScheme, arguments);
};
/**
* Check if key pair contains private key
*/
RSAKey.prototype.isPrivate = function () {
return this.n && this.e && this.d && true || false;
};
/**
* Check if key pair contains public key
* @param strict {boolean} - public key only, return false if have private exponent
*/
RSAKey.prototype.isPublic = function (strict) {
return this.n && this.e && !(strict && this.d) || false;
};
Object.defineProperty(RSAKey.prototype, 'keySize', {
get: function () {
return this.cache.keyBitLength;
}
});
Object.defineProperty(RSAKey.prototype, 'encryptedDataLength', {
get: function () {
return this.cache.keyByteLength;
}
});
Object.defineProperty(RSAKey.prototype, 'maxMessageLength', {
get: function () {
return this.encryptionScheme.maxMessageLength();
}
});
/**
* Caching key data
*/
RSAKey.prototype.$$recalculateCache = function () {
this.cache = this.cache || {};
// Bit & byte length
this.cache.keyBitLength = this.n.bitLength();
this.cache.keyByteLength = (this.cache.keyBitLength + 6) >> 3;
};
return RSAKey;
})();

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/**
* PKCS1 padding and signature scheme
*/
var BigInteger = require('../libs/jsbn');
var crypt = require('crypto');
var constants = require('constants');
var SIGN_INFO_HEAD = {
md2: Buffer.from('3020300c06082a864886f70d020205000410', 'hex'),
md5: Buffer.from('3020300c06082a864886f70d020505000410', 'hex'),
sha1: Buffer.from('3021300906052b0e03021a05000414', 'hex'),
sha224: Buffer.from('302d300d06096086480165030402040500041c', 'hex'),
sha256: Buffer.from('3031300d060960864801650304020105000420', 'hex'),
sha384: Buffer.from('3041300d060960864801650304020205000430', 'hex'),
sha512: Buffer.from('3051300d060960864801650304020305000440', 'hex'),
ripemd160: Buffer.from('3021300906052b2403020105000414', 'hex'),
rmd160: Buffer.from('3021300906052b2403020105000414', 'hex')
};
var SIGN_ALG_TO_HASH_ALIASES = {
'ripemd160': 'rmd160'
};
var DEFAULT_HASH_FUNCTION = 'sha256';
module.exports = {
isEncryption: true,
isSignature: true
};
module.exports.makeScheme = function (key, options) {
function Scheme(key, options) {
this.key = key;
this.options = options;
}
Scheme.prototype.maxMessageLength = function () {
if (this.options.encryptionSchemeOptions && this.options.encryptionSchemeOptions.padding == 3) {
return this.key.encryptedDataLength;
}
return this.key.encryptedDataLength - 11;
};
/**
* Pad input Buffer to encryptedDataLength bytes, and return Buffer.from
* alg: PKCS#1
* @param buffer
* @returns {Buffer}
*/
Scheme.prototype.encPad = function (buffer, options) {
options = options || {};
var filled;
if (buffer.length > this.key.maxMessageLength) {
throw new Error("Message too long for RSA (n=" + this.key.encryptedDataLength + ", l=" + buffer.length + ")");
}
if (this.options.encryptionSchemeOptions && this.options.encryptionSchemeOptions.padding == 3) {
//RSA_NO_PADDING treated like JAVA left pad with zero character
filled = Buffer.alloc(this.key.maxMessageLength - buffer.length);
filled.fill(0);
return Buffer.concat([filled, buffer]);
}
/* Type 1: zeros padding for private key encrypt */
if (options.type === 1) {
filled = Buffer.alloc(this.key.encryptedDataLength - buffer.length - 1);
filled.fill(0xff, 0, filled.length - 1);
filled[0] = 1;
filled[filled.length - 1] = 0;
return Buffer.concat([filled, buffer]);
} else {
/* random padding for public key encrypt */
filled = Buffer.alloc(this.key.encryptedDataLength - buffer.length);
filled[0] = 0;
filled[1] = 2;
var rand = crypt.randomBytes(filled.length - 3);
for (var i = 0; i < rand.length; i++) {
var r = rand[i];
while (r === 0) { // non-zero only
r = crypt.randomBytes(1)[0];
}
filled[i + 2] = r;
}
filled[filled.length - 1] = 0;
return Buffer.concat([filled, buffer]);
}
};
/**
* Unpad input Buffer and, if valid, return the Buffer object
* alg: PKCS#1 (type 2, random)
* @param buffer
* @returns {Buffer}
*/
Scheme.prototype.encUnPad = function (buffer, options) {
return buffer;
};
Scheme.prototype.sign = function (buffer) {
var hashAlgorithm = this.options.signingSchemeOptions.hash || DEFAULT_HASH_FUNCTION;
if (this.options.environment === 'browser') {
hashAlgorithm = SIGN_ALG_TO_HASH_ALIASES[hashAlgorithm] || hashAlgorithm;
var hasher = crypt.createHash(hashAlgorithm);
hasher.update(buffer);
var hash = this.pkcs1pad(hasher.digest(), hashAlgorithm);
var res = this.key.$doPrivate(new BigInteger(hash)).toBuffer(this.key.encryptedDataLength);
return res;
} else {
var signer = crypt.createSign('RSA-' + hashAlgorithm.toUpperCase());
signer.update(buffer);
return signer.sign(this.options.rsaUtils.exportKey('private'));
}
};
Scheme.prototype.verify = function (buffer, signature, signature_encoding) {
if (this.options.encryptionSchemeOptions && this.options.encryptionSchemeOptions.padding == 3) {
//RSA_NO_PADDING has no verify data
return false;
}
var hashAlgorithm = this.options.signingSchemeOptions.hash || DEFAULT_HASH_FUNCTION;
if (this.options.environment === 'browser') {
hashAlgorithm = SIGN_ALG_TO_HASH_ALIASES[hashAlgorithm] || hashAlgorithm;
if (signature_encoding) {
signature = Buffer.from(signature, signature_encoding);
}
var hasher = crypt.createHash(hashAlgorithm);
hasher.update(buffer);
var hash = this.pkcs1pad(hasher.digest(), hashAlgorithm);
var m = this.key.$doPublic(new BigInteger(signature));
return m.toBuffer().toString('hex') == hash.toString('hex');
} else {
var verifier = crypt.createVerify('RSA-' + hashAlgorithm.toUpperCase());
verifier.update(buffer);
return verifier.verify(this.options.rsaUtils.exportKey('public'), signature, signature_encoding);
}
};
/**
* PKCS#1 zero pad input buffer to max data length
* @param hashBuf
* @param hashAlgorithm
* @returns {*}
*/
Scheme.prototype.pkcs0pad = function (buffer) {
var filled = Buffer.alloc(this.key.maxMessageLength - buffer.length);
filled.fill(0);
return Buffer.concat([filled, buffer]);
};
Scheme.prototype.pkcs0unpad = function (buffer) {
var unPad;
if (typeof buffer.lastIndexOf == "function") { //patch for old node version
unPad = buffer.slice(buffer.lastIndexOf('\0') + 1, buffer.length);
} else {
unPad = buffer.slice(String.prototype.lastIndexOf.call(buffer, '\0') + 1, buffer.length);
}
return unPad;
};
/**
* PKCS#1 pad input buffer to max data length
* @param hashBuf
* @param hashAlgorithm
* @returns {*}
*/
Scheme.prototype.pkcs1pad = function (hashBuf, hashAlgorithm) {
var digest = SIGN_INFO_HEAD[hashAlgorithm];
if (!digest) {
throw Error('Unsupported hash algorithm');
}
var data = Buffer.concat([digest, hashBuf]);
if (data.length + 10 > this.key.encryptedDataLength) {
throw Error('Key is too short for signing algorithm (' + hashAlgorithm + ')');
}
var filled = Buffer.alloc(this.key.encryptedDataLength - data.length - 1);
filled.fill(0xff, 0, filled.length - 1);
filled[0] = 1;
filled[filled.length - 1] = 0;
var res = Buffer.concat([filled, data]);
return res;
};
return new Scheme(key, options);
};

21
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module.exports = {
pkcs1: require('./pkcs1'),
/**
* Check if scheme has padding methods
* @param scheme {string}
* @returns {Boolean}
*/
isEncryption: function (scheme) {
return module.exports[scheme] && module.exports[scheme].isEncryption;
},
/**
* Check if scheme has sign/verify methods
* @param scheme {string}
* @returns {Boolean}
*/
isSignature: function (scheme) {
return module.exports[scheme] && module.exports[scheme].isSignature;
}
};

106
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/*
* Utils functions
*
*/
/**
* Break string str each maxLen symbols
* @param str
* @param maxLen
* @returns {string}
*/
module.exports.linebrk = function (str, maxLen) {
var res = '';
var i = 0;
while (i + maxLen < str.length) {
res += str.substring(i, i + maxLen) + "\n";
i += maxLen;
}
return res + str.substring(i, str.length);
};
module.exports.detectEnvironment = function () {
if (typeof(window) !== 'undefined' && window && !(process && process.title === 'node')) {
return 'browser';
}
return 'node';
};
/**
* Trying get a 32-bit unsigned integer from the partial buffer
* @param buffer
* @param offset
* @returns {Number}
*/
module.exports.get32IntFromBuffer = function (buffer, offset) {
offset = offset || 0;
var size = 0;
if ((size = buffer.length - offset) > 0) {
if (size >= 4) {
return buffer.readUIntBE(offset, size);
} else {
var res = 0;
for (var i = offset + size, d = 0; i > offset; i--, d += 2) {
res += buffer[i - 1] * Math.pow(16, d);
}
return res;
}
} else {
return NaN;
}
};
module.exports._ = {
isObject: function (value) {
var type = typeof value;
return !!value && (type == 'object' || type == 'function');
},
isString: function (value) {
return typeof value == 'string' || value instanceof String;
},
isNumber: function (value) {
return typeof value == 'number' || !isNaN(parseFloat(value)) && isFinite(value);
},
/**
* Returns copy of `obj` without `removeProp` field.
* @param obj
* @param removeProp
* @returns Object
*/
omit: function (obj, removeProp) {
var newObj = {};
for (var prop in obj) {
if (!obj.hasOwnProperty(prop) || prop === removeProp) {
continue;
}
newObj[prop] = obj[prop];
}
return newObj;
}
};
/**
* Strips everything around the opening and closing lines, including the lines
* themselves.
*/
module.exports.trimSurroundingText = function (data, opening, closing) {
var trimStartIndex = 0;
var trimEndIndex = data.length;
var openingBoundaryIndex = data.indexOf(opening);
if (openingBoundaryIndex >= 0) {
trimStartIndex = openingBoundaryIndex + opening.length;
}
var closingBoundaryIndex = data.indexOf(closing, openingBoundaryIndex);
if (closingBoundaryIndex >= 0) {
trimEndIndex = closingBoundaryIndex;
}
return data.substring(trimStartIndex, trimEndIndex);
}