jsencrypt
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A Javascript library to perform OpenSSL RSA Encryption, Decryption, and Key Generation.
314 lines (313 loc) • 12.8 kB
JavaScript
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
import { hex2b64 } from "./lib/jsbn/base64";
import { Hex } from "./lib/asn1js/hex";
import { Base64 } from "./lib/asn1js/base64";
import { ASN1 } from "./lib/asn1js/asn1";
import { RSAKey } from "./lib/jsbn/rsa";
import { parseBigInt } from "./lib/jsbn/jsbn";
import { KJUR } from "./lib/jsrsasign/asn1-1.0";
/**
* Create a new JSEncryptRSAKey that extends Tom Wu's RSA key object.
* This object is just a decorator for parsing the key parameter
* @param {string|Object} key - The key in string format, or an object containing
* the parameters needed to build a RSAKey object.
* @constructor
*/
var JSEncryptRSAKey = /** @class */ (function (_super) {
__extends(JSEncryptRSAKey, _super);
function JSEncryptRSAKey(key) {
var _this = _super.call(this) || this;
// Call the super constructor.
// RSAKey.call(this);
// If a key key was provided.
if (key) {
// If this is a string...
if (typeof key === "string") {
_this.parseKey(key);
}
else if (JSEncryptRSAKey.hasPrivateKeyProperty(key) ||
JSEncryptRSAKey.hasPublicKeyProperty(key)) {
// Set the values for the key.
_this.parsePropertiesFrom(key);
}
}
return _this;
}
/**
* Method to parse a pem encoded string containing both a public or private key.
* The method will translate the pem encoded string in a der encoded string and
* will parse private key and public key parameters. This method accepts public key
* in the rsaencryption pkcs #1 format (oid: 1.2.840.113549.1.1.1).
*
* @todo Check how many rsa formats use the same format of pkcs #1.
*
* The format is defined as:
* PublicKeyInfo ::= SEQUENCE {
* algorithm AlgorithmIdentifier,
* PublicKey BIT STRING
* }
* Where AlgorithmIdentifier is:
* AlgorithmIdentifier ::= SEQUENCE {
* algorithm OBJECT IDENTIFIER, the OID of the enc algorithm
* parameters ANY DEFINED BY algorithm OPTIONAL (NULL for PKCS #1)
* }
* and PublicKey is a SEQUENCE encapsulated in a BIT STRING
* RSAPublicKey ::= SEQUENCE {
* modulus INTEGER, -- n
* publicExponent INTEGER -- e
* }
* it's possible to examine the structure of the keys obtained from openssl using
* an asn.1 dumper as the one used here to parse the components: http://lapo.it/asn1js/
* @argument {string} pem the pem encoded string, can include the BEGIN/END header/footer
* @private
*/
JSEncryptRSAKey.prototype.parseKey = function (pem) {
try {
var modulus = 0;
var public_exponent = 0;
var reHex = /^\s*(?:[0-9A-Fa-f][0-9A-Fa-f]\s*)+$/;
var der = reHex.test(pem) ? Hex.decode(pem) : Base64.unarmor(pem);
var asn1 = ASN1.decode(der);
// Fixes a bug with OpenSSL 1.0+ private keys
if (asn1.sub.length === 3) {
asn1 = asn1.sub[2].sub[0];
}
if (asn1.sub.length === 9) {
// Parse the private key.
modulus = asn1.sub[1].getHexStringValue(); // bigint
this.n = parseBigInt(modulus, 16);
public_exponent = asn1.sub[2].getHexStringValue(); // int
this.e = parseInt(public_exponent, 16);
var private_exponent = asn1.sub[3].getHexStringValue(); // bigint
this.d = parseBigInt(private_exponent, 16);
var prime1 = asn1.sub[4].getHexStringValue(); // bigint
this.p = parseBigInt(prime1, 16);
var prime2 = asn1.sub[5].getHexStringValue(); // bigint
this.q = parseBigInt(prime2, 16);
var exponent1 = asn1.sub[6].getHexStringValue(); // bigint
this.dmp1 = parseBigInt(exponent1, 16);
var exponent2 = asn1.sub[7].getHexStringValue(); // bigint
this.dmq1 = parseBigInt(exponent2, 16);
var coefficient = asn1.sub[8].getHexStringValue(); // bigint
this.coeff = parseBigInt(coefficient, 16);
}
else if (asn1.sub.length === 2) {
// Parse the public key.
var bit_string = asn1.sub[1];
var sequence = bit_string.sub[0];
modulus = sequence.sub[0].getHexStringValue();
this.n = parseBigInt(modulus, 16);
public_exponent = sequence.sub[1].getHexStringValue();
this.e = parseInt(public_exponent, 16);
}
else {
return false;
}
return true;
}
catch (ex) {
return false;
}
};
/**
* Translate rsa parameters in a hex encoded string representing the rsa key.
*
* The translation follow the ASN.1 notation :
* RSAPrivateKey ::= SEQUENCE {
* version Version,
* modulus INTEGER, -- n
* publicExponent INTEGER, -- e
* privateExponent INTEGER, -- d
* prime1 INTEGER, -- p
* prime2 INTEGER, -- q
* exponent1 INTEGER, -- d mod (p1)
* exponent2 INTEGER, -- d mod (q-1)
* coefficient INTEGER, -- (inverse of q) mod p
* }
* @returns {string} DER Encoded String representing the rsa private key
* @private
*/
JSEncryptRSAKey.prototype.getPrivateBaseKey = function () {
var options = {
array: [
new KJUR.asn1.DERInteger({ int: 0 }),
new KJUR.asn1.DERInteger({ bigint: this.n }),
new KJUR.asn1.DERInteger({ int: this.e }),
new KJUR.asn1.DERInteger({ bigint: this.d }),
new KJUR.asn1.DERInteger({ bigint: this.p }),
new KJUR.asn1.DERInteger({ bigint: this.q }),
new KJUR.asn1.DERInteger({ bigint: this.dmp1 }),
new KJUR.asn1.DERInteger({ bigint: this.dmq1 }),
new KJUR.asn1.DERInteger({ bigint: this.coeff })
]
};
var seq = new KJUR.asn1.DERSequence(options);
return seq.getEncodedHex();
};
/**
* base64 (pem) encoded version of the DER encoded representation
* @returns {string} pem encoded representation without header and footer
* @public
*/
JSEncryptRSAKey.prototype.getPrivateBaseKeyB64 = function () {
return hex2b64(this.getPrivateBaseKey());
};
/**
* Translate rsa parameters in a hex encoded string representing the rsa public key.
* The representation follow the ASN.1 notation :
* PublicKeyInfo ::= SEQUENCE {
* algorithm AlgorithmIdentifier,
* PublicKey BIT STRING
* }
* Where AlgorithmIdentifier is:
* AlgorithmIdentifier ::= SEQUENCE {
* algorithm OBJECT IDENTIFIER, the OID of the enc algorithm
* parameters ANY DEFINED BY algorithm OPTIONAL (NULL for PKCS #1)
* }
* and PublicKey is a SEQUENCE encapsulated in a BIT STRING
* RSAPublicKey ::= SEQUENCE {
* modulus INTEGER, -- n
* publicExponent INTEGER -- e
* }
* @returns {string} DER Encoded String representing the rsa public key
* @private
*/
JSEncryptRSAKey.prototype.getPublicBaseKey = function () {
var first_sequence = new KJUR.asn1.DERSequence({
array: [
new KJUR.asn1.DERObjectIdentifier({ oid: "1.2.840.113549.1.1.1" }),
new KJUR.asn1.DERNull()
]
});
var second_sequence = new KJUR.asn1.DERSequence({
array: [
new KJUR.asn1.DERInteger({ bigint: this.n }),
new KJUR.asn1.DERInteger({ int: this.e })
]
});
var bit_string = new KJUR.asn1.DERBitString({
hex: "00" + second_sequence.getEncodedHex()
});
var seq = new KJUR.asn1.DERSequence({
array: [
first_sequence,
bit_string
]
});
return seq.getEncodedHex();
};
/**
* base64 (pem) encoded version of the DER encoded representation
* @returns {string} pem encoded representation without header and footer
* @public
*/
JSEncryptRSAKey.prototype.getPublicBaseKeyB64 = function () {
return hex2b64(this.getPublicBaseKey());
};
/**
* wrap the string in block of width chars. The default value for rsa keys is 64
* characters.
* @param {string} str the pem encoded string without header and footer
* @param {Number} [width=64] - the length the string has to be wrapped at
* @returns {string}
* @private
*/
JSEncryptRSAKey.wordwrap = function (str, width) {
width = width || 64;
if (!str) {
return str;
}
var regex = "(.{1," + width + "})( +|$\n?)|(.{1," + width + "})";
return str.match(RegExp(regex, "g")).join("\n");
};
/**
* Retrieve the pem encoded private key
* @returns {string} the pem encoded private key with header/footer
* @public
*/
JSEncryptRSAKey.prototype.getPrivateKey = function () {
var key = "-----BEGIN RSA PRIVATE KEY-----\n";
key += JSEncryptRSAKey.wordwrap(this.getPrivateBaseKeyB64()) + "\n";
key += "-----END RSA PRIVATE KEY-----";
return key;
};
/**
* Retrieve the pem encoded public key
* @returns {string} the pem encoded public key with header/footer
* @public
*/
JSEncryptRSAKey.prototype.getPublicKey = function () {
var key = "-----BEGIN PUBLIC KEY-----\n";
key += JSEncryptRSAKey.wordwrap(this.getPublicBaseKeyB64()) + "\n";
key += "-----END PUBLIC KEY-----";
return key;
};
/**
* Check if the object contains the necessary parameters to populate the rsa modulus
* and public exponent parameters.
* @param {Object} [obj={}] - An object that may contain the two public key
* parameters
* @returns {boolean} true if the object contains both the modulus and the public exponent
* properties (n and e)
* @todo check for types of n and e. N should be a parseable bigInt object, E should
* be a parseable integer number
* @private
*/
JSEncryptRSAKey.hasPublicKeyProperty = function (obj) {
obj = obj || {};
return (obj.hasOwnProperty("n") &&
obj.hasOwnProperty("e"));
};
/**
* Check if the object contains ALL the parameters of an RSA key.
* @param {Object} [obj={}] - An object that may contain nine rsa key
* parameters
* @returns {boolean} true if the object contains all the parameters needed
* @todo check for types of the parameters all the parameters but the public exponent
* should be parseable bigint objects, the public exponent should be a parseable integer number
* @private
*/
JSEncryptRSAKey.hasPrivateKeyProperty = function (obj) {
obj = obj || {};
return (obj.hasOwnProperty("n") &&
obj.hasOwnProperty("e") &&
obj.hasOwnProperty("d") &&
obj.hasOwnProperty("p") &&
obj.hasOwnProperty("q") &&
obj.hasOwnProperty("dmp1") &&
obj.hasOwnProperty("dmq1") &&
obj.hasOwnProperty("coeff"));
};
/**
* Parse the properties of obj in the current rsa object. Obj should AT LEAST
* include the modulus and public exponent (n, e) parameters.
* @param {Object} obj - the object containing rsa parameters
* @private
*/
JSEncryptRSAKey.prototype.parsePropertiesFrom = function (obj) {
this.n = obj.n;
this.e = obj.e;
if (obj.hasOwnProperty("d")) {
this.d = obj.d;
this.p = obj.p;
this.q = obj.q;
this.dmp1 = obj.dmp1;
this.dmq1 = obj.dmq1;
this.coeff = obj.coeff;
}
};
return JSEncryptRSAKey;
}(RSAKey));
export { JSEncryptRSAKey };