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keyutil-1.0.js
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keyutil-1.0.js
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/* keyutil-1.2.0.js (c) 2013-2017 Kenji Urushima | kjur.github.com/jsrsasign/license
*/
/*
* keyutil.js - key utility for PKCS#1/5/8 PEM, RSA/DSA/ECDSA key object
*
* Copyright (c) 2013-2017 Kenji Urushima (kenji.urushima@gmail.com)
*
* This software is licensed under the terms of the MIT License.
* https://kjur.github.io/jsrsasign/license
*
* The above copyright and license notice shall be
* included in all copies or substantial portions of the Software.
*/
/**
* @fileOverview
* @name keyutil-1.0.js
* @author Kenji Urushima kenji.urushima@gmail.com
* @version jsrsasign 8.0.0 keyutil 1.2.0 (2017-Jun-26)
* @since jsrsasign 4.1.4
* @license <a href="https://kjur.github.io/jsrsasign/license/">MIT License</a>
*/
/**
* @name KEYUTIL
* @class class for RSA/ECC/DSA key utility
* @description
* <br/>
* {@link KEYUTIL} class is an update of former {@link PKCS5PKEY} class.
* {@link KEYUTIL} class has following features:
* <dl>
* <dt><b>key loading - {@link KEYUTIL.getKey}</b>
* <dd>
* <ul>
* <li>supports RSAKey and KJUR.crypto.{ECDSA,DSA} key object</li>
* <li>supports private key and public key</li>
* <li>supports encrypted and plain private key</li>
* <li>supports PKCS#1, PKCS#5 and PKCS#8 key</li>
* <li>supports public key in X.509 certificate</li>
* <li>key represented by JSON object</li>
* </ul>
* NOTE1: Encrypted PKCS#8 only supports PBKDF2/HmacSHA1/3DES <br/>
* NOTE2: Encrypted PKCS#5 supports DES-CBC, DES-EDE3-CBC, AES-{128,192.256}-CBC <br/>
*
* <dt><b>exporting key - {@link KEYUTIL.getPEM}</b>
* <dd>
* {@link KEYUTIL.getPEM} method supports following formats:
* <ul>
* <li>supports RSA/EC/DSA keys</li>
* <li>PKCS#1 plain RSA/EC/DSA private key</li>
* <li>PKCS#5 encrypted RSA/EC/DSA private key with DES-CBC, DES-EDE3-CBC, AES-{128,192.256}-CBC</li>
* <li>PKCS#8 plain RSA/EC/DSA private key</li>
* <li>PKCS#8 encrypted RSA/EC/DSA private key with PBKDF2_HmacSHA1_3DES</li>
* </ul>
*
* <dt><b>keypair generation - {@link KEYUTIL.generateKeypair}</b>
* <ul>
* <li>generate key pair of {@link RSAKey} or {@link KJUR.crypto.ECDSA}.</li>
* <li>generate private key and convert it to PKCS#5 encrypted private key.</li>
* </ul>
* NOTE: {@link KJUR.crypto.DSA} is not yet supported.
* </dl>
*
* @example
* // 1. loading PEM private key
* var key = KEYUTIL.getKey(pemPKCS1PrivateKey);
* var key = KEYUTIL.getKey(pemPKCS5EncryptedPrivateKey, "passcode");
* var key = KEYUTIL.getKey(pemPKC85PlainPrivateKey);
* var key = KEYUTIL.getKey(pemPKC85EncryptedPrivateKey, "passcode");
* // 2. loading PEM public key
* var key = KEYUTIL.getKey(pemPKCS8PublicKey);
* var key = KEYUTIL.getKey(pemX509Certificate);
* // 3. exporting private key
* var pem = KEYUTIL.getPEM(privateKeyObj, "PKCS1PRV");
* var pem = KEYUTIL.getPEM(privateKeyObj, "PKCS5PRV", "passcode"); // DES-EDE3-CBC by default
* var pem = KEYUTIL.getPEM(privateKeyObj, "PKCS5PRV", "passcode", "DES-CBC");
* var pem = KEYUTIL.getPEM(privateKeyObj, "PKCS8PRV");
* var pem = KEYUTIL.getPEM(privateKeyObj, "PKCS8PRV", "passcode");
* // 4. exporting public key
* var pem = KEYUTIL.getPEM(publicKeyObj);
*/
var KEYUTIL = function() {
// *****************************************************************
// *** PRIVATE PROPERTIES AND METHODS *******************************
// *****************************************************************
// shared key decryption ------------------------------------------
var decryptAES = function(dataHex, keyHex, ivHex) {
return decryptGeneral(CryptoJS.AES, dataHex, keyHex, ivHex);
};
var decrypt3DES = function(dataHex, keyHex, ivHex) {
return decryptGeneral(CryptoJS.TripleDES, dataHex, keyHex, ivHex);
};
var decryptDES = function(dataHex, keyHex, ivHex) {
return decryptGeneral(CryptoJS.DES, dataHex, keyHex, ivHex);
};
var decryptGeneral = function(f, dataHex, keyHex, ivHex) {
var data = CryptoJS.enc.Hex.parse(dataHex);
var key = CryptoJS.enc.Hex.parse(keyHex);
var iv = CryptoJS.enc.Hex.parse(ivHex);
var encrypted = {};
encrypted.key = key;
encrypted.iv = iv;
encrypted.ciphertext = data;
var decrypted = f.decrypt(encrypted, key, { iv: iv });
return CryptoJS.enc.Hex.stringify(decrypted);
};
// shared key decryption ------------------------------------------
var encryptAES = function(dataHex, keyHex, ivHex) {
return encryptGeneral(CryptoJS.AES, dataHex, keyHex, ivHex);
};
var encrypt3DES = function(dataHex, keyHex, ivHex) {
return encryptGeneral(CryptoJS.TripleDES, dataHex, keyHex, ivHex);
};
var encryptDES = function(dataHex, keyHex, ivHex) {
return encryptGeneral(CryptoJS.DES, dataHex, keyHex, ivHex);
};
var encryptGeneral = function(f, dataHex, keyHex, ivHex) {
var data = CryptoJS.enc.Hex.parse(dataHex);
var key = CryptoJS.enc.Hex.parse(keyHex);
var iv = CryptoJS.enc.Hex.parse(ivHex);
var encryptedHex = f.encrypt(data, key, { iv: iv });
var encryptedWA = CryptoJS.enc.Hex.parse(encryptedHex.toString());
var encryptedB64 = CryptoJS.enc.Base64.stringify(encryptedWA);
return encryptedB64;
};
// other methods and properties ----------------------------------------
var ALGLIST = {
'AES-256-CBC': { 'proc': decryptAES, 'eproc': encryptAES, keylen: 32, ivlen: 16 },
'AES-192-CBC': { 'proc': decryptAES, 'eproc': encryptAES, keylen: 24, ivlen: 16 },
'AES-128-CBC': { 'proc': decryptAES, 'eproc': encryptAES, keylen: 16, ivlen: 16 },
'DES-EDE3-CBC': { 'proc': decrypt3DES, 'eproc': encrypt3DES, keylen: 24, ivlen: 8 },
'DES-CBC': { 'proc': decryptDES, 'eproc': encryptDES, keylen: 8, ivlen: 8 }
};
var getFuncByName = function(algName) {
return ALGLIST[algName]['proc'];
};
var _generateIvSaltHex = function(numBytes) {
var wa = CryptoJS.lib.WordArray.random(numBytes);
var hex = CryptoJS.enc.Hex.stringify(wa);
return hex;
};
var _parsePKCS5PEM = function(sPKCS5PEM) {
var info = {};
var matchResult1 = sPKCS5PEM.match(new RegExp("DEK-Info: ([^,]+),([0-9A-Fa-f]+)", "m"));
if (matchResult1) {
info.cipher = matchResult1[1];
info.ivsalt = matchResult1[2];
}
var matchResult2 = sPKCS5PEM.match(new RegExp("-----BEGIN ([A-Z]+) PRIVATE KEY-----"));
if (matchResult2) {
info.type = matchResult2[1];
}
var i1 = -1;
var lenNEWLINE = 0;
if (sPKCS5PEM.indexOf("\r\n\r\n") != -1) {
i1 = sPKCS5PEM.indexOf("\r\n\r\n");
lenNEWLINE = 2;
}
if (sPKCS5PEM.indexOf("\n\n") != -1) {
i1 = sPKCS5PEM.indexOf("\n\n");
lenNEWLINE = 1;
}
var i2 = sPKCS5PEM.indexOf("-----END");
if (i1 != -1 && i2 != -1) {
var s = sPKCS5PEM.substring(i1 + lenNEWLINE * 2, i2 - lenNEWLINE);
s = s.replace(/\s+/g, '');
info.data = s;
}
return info;
};
var _getKeyAndUnusedIvByPasscodeAndIvsalt = function(algName, passcode, ivsaltHex) {
//alert("ivsaltHex(2) = " + ivsaltHex);
var saltHex = ivsaltHex.substring(0, 16);
//alert("salt = " + saltHex);
var salt = CryptoJS.enc.Hex.parse(saltHex);
var data = CryptoJS.enc.Utf8.parse(passcode);
//alert("salt = " + salt);
//alert("data = " + data);
var nRequiredBytes = ALGLIST[algName]['keylen'] + ALGLIST[algName]['ivlen'];
var hHexValueJoined = '';
var hLastValue = null;
//alert("nRequiredBytes = " + nRequiredBytes);
for (;;) {
var h = CryptoJS.algo.MD5.create();
if (hLastValue != null) {
h.update(hLastValue);
}
h.update(data);
h.update(salt);
hLastValue = h.finalize();
hHexValueJoined = hHexValueJoined + CryptoJS.enc.Hex.stringify(hLastValue);
//alert("joined = " + hHexValueJoined);
if (hHexValueJoined.length >= nRequiredBytes * 2) {
break;
}
}
var result = {};
result.keyhex = hHexValueJoined.substr(0, ALGLIST[algName]['keylen'] * 2);
result.ivhex = hHexValueJoined.substr(ALGLIST[algName]['keylen'] * 2, ALGLIST[algName]['ivlen'] * 2);
return result;
};
/*
* @param {String} privateKeyB64 base64 string of encrypted private key
* @param {String} sharedKeyAlgName algorithm name of shared key encryption
* @param {String} sharedKeyHex hexadecimal string of shared key to encrypt
* @param {String} ivsaltHex hexadecimal string of IV and salt
* @param {String} hexadecimal string of decrypted private key
*/
var _decryptKeyB64 = function(privateKeyB64, sharedKeyAlgName, sharedKeyHex, ivsaltHex) {
var privateKeyWA = CryptoJS.enc.Base64.parse(privateKeyB64);
var privateKeyHex = CryptoJS.enc.Hex.stringify(privateKeyWA);
var f = ALGLIST[sharedKeyAlgName]['proc'];
var decryptedKeyHex = f(privateKeyHex, sharedKeyHex, ivsaltHex);
return decryptedKeyHex;
};
/*
* @param {String} privateKeyHex hexadecimal string of private key
* @param {String} sharedKeyAlgName algorithm name of shared key encryption
* @param {String} sharedKeyHex hexadecimal string of shared key to encrypt
* @param {String} ivsaltHex hexadecimal string of IV and salt
* @param {String} base64 string of encrypted private key
*/
var _encryptKeyHex = function(privateKeyHex, sharedKeyAlgName, sharedKeyHex, ivsaltHex) {
var f = ALGLIST[sharedKeyAlgName]['eproc'];
var encryptedKeyB64 = f(privateKeyHex, sharedKeyHex, ivsaltHex);
return encryptedKeyB64;
};
// *****************************************************************
// *** PUBLIC PROPERTIES AND METHODS *******************************
// *****************************************************************
return {
// -- UTILITY METHODS ------------------------------------------------------------
/**
* decrypt private key by shared key
* @name version
* @memberOf KEYUTIL
* @property {String} version
* @description version string of KEYUTIL class
*/
version: "1.0.0",
/**
* parse PEM formatted passcode protected PKCS#5 private key
* @name parsePKCS5PEM
* @memberOf KEYUTIL
* @function
* @param {String} sEncryptedPEM PEM formatted protected passcode protected PKCS#5 private key
* @return {Hash} hash of key information
* @description
* Resulted hash has following attributes.
* <ul>
* <li>cipher - symmetric key algorithm name (ex. 'DES-EBE3-CBC', 'AES-256-CBC')</li>
* <li>ivsalt - IV used for decrypt. Its heading 8 bytes will be used for passcode salt.</li>
* <li>type - asymmetric key algorithm name of private key described in PEM header.</li>
* <li>data - base64 encoded encrypted private key.</li>
* </ul>
*
*/
parsePKCS5PEM: function(sPKCS5PEM) {
return _parsePKCS5PEM(sPKCS5PEM);
},
/**
* the same function as OpenSSL EVP_BytsToKey to generate shared key and IV
* @name getKeyAndUnusedIvByPasscodeAndIvsalt
* @memberOf KEYUTIL
* @function
* @param {String} algName name of symmetric key algorithm (ex. 'DES-EBE3-CBC')
* @param {String} passcode passcode to decrypt private key (ex. 'password')
* @param {String} hexadecimal string of IV. heading 8 bytes will be used for passcode salt
* @return {Hash} hash of key and unused IV (ex. {keyhex:2fe3..., ivhex:3fad..})
*/
getKeyAndUnusedIvByPasscodeAndIvsalt: function(algName, passcode, ivsaltHex) {
return _getKeyAndUnusedIvByPasscodeAndIvsalt(algName, passcode, ivsaltHex);
},
decryptKeyB64: function(privateKeyB64, sharedKeyAlgName, sharedKeyHex, ivsaltHex) {
return _decryptKeyB64(privateKeyB64, sharedKeyAlgName, sharedKeyHex, ivsaltHex);
},
/**
* decrypt PEM formatted protected PKCS#5 private key with passcode
* @name getDecryptedKeyHex
* @memberOf KEYUTIL
* @function
* @param {String} sEncryptedPEM PEM formatted protected passcode protected PKCS#5 private key
* @param {String} passcode passcode to decrypt private key (ex. 'password')
* @return {String} hexadecimal string of decrypted RSA priavte key
*/
getDecryptedKeyHex: function(sEncryptedPEM, passcode) {
// 1. parse pem
var info = _parsePKCS5PEM(sEncryptedPEM);
var publicKeyAlgName = info.type;
var sharedKeyAlgName = info.cipher;
var ivsaltHex = info.ivsalt;
var privateKeyB64 = info.data;
//alert("ivsaltHex = " + ivsaltHex);
// 2. generate shared key
var sharedKeyInfo = _getKeyAndUnusedIvByPasscodeAndIvsalt(sharedKeyAlgName, passcode, ivsaltHex);
var sharedKeyHex = sharedKeyInfo.keyhex;
//alert("sharedKeyHex = " + sharedKeyHex);
// 3. decrypt private key
var decryptedKey = _decryptKeyB64(privateKeyB64, sharedKeyAlgName, sharedKeyHex, ivsaltHex);
return decryptedKey;
},
/*
* get PEM formatted encrypted PKCS#5 private key from hexadecimal string of plain private key
* @name getEncryptedPKCS5PEMFromPrvKeyHex
* @memberOf KEYUTIL
* @function
* @param {String} pemHeadAlg algorithm name in the pem header (i.e. RSA,EC or DSA)
* @param {String} hPrvKey hexadecimal string of plain private key
* @param {String} passcode pass code to protect private key (ex. password)
* @param {String} sharedKeyAlgName algorithm name to protect private key (ex. AES-256-CBC)
* @param {String} ivsaltHex hexadecimal string of IV and salt
* @return {String} string of PEM formatted encrypted PKCS#5 private key
* @since pkcs5pkey 1.0.2
* @description
* <br/>
* generate PEM formatted encrypted PKCS#5 private key by hexadecimal string encoded
* ASN.1 object of plain RSA private key.
* Following arguments can be omitted.
* <ul>
* <li>alg - AES-256-CBC will be used if omitted.</li>
* <li>ivsaltHex - automatically generate IV and salt which length depends on algorithm</li>
* </ul>
* NOTE1: DES-CBC, DES-EDE3-CBC, AES-{128,192.256}-CBC algorithm are supported.
* @example
* var pem =
* KEYUTIL.getEncryptedPKCS5PEMFromPrvKeyHex(plainKeyHex, "password");
* var pem2 =
* KEYUTIL.getEncryptedPKCS5PEMFromPrvKeyHex(plainKeyHex, "password", "AES-128-CBC");
* var pem3 =
* KEYUTIL.getEncryptedPKCS5PEMFromPrvKeyHex(plainKeyHex, "password", "AES-128-CBC", "1f3d02...");
*/
getEncryptedPKCS5PEMFromPrvKeyHex: function(pemHeadAlg, hPrvKey, passcode, sharedKeyAlgName, ivsaltHex) {
var sPEM = "";
// 1. set sharedKeyAlgName if undefined (default AES-256-CBC)
if (typeof sharedKeyAlgName == "undefined" || sharedKeyAlgName == null) {
sharedKeyAlgName = "AES-256-CBC";
}
if (typeof ALGLIST[sharedKeyAlgName] == "undefined")
throw "KEYUTIL unsupported algorithm: " + sharedKeyAlgName;
// 2. set ivsaltHex if undefined
if (typeof ivsaltHex == "undefined" || ivsaltHex == null) {
var ivlen = ALGLIST[sharedKeyAlgName]['ivlen'];
var randIV = _generateIvSaltHex(ivlen);
ivsaltHex = randIV.toUpperCase();
}
// 3. get shared key
//alert("ivsalthex=" + ivsaltHex);
var sharedKeyInfo = _getKeyAndUnusedIvByPasscodeAndIvsalt(sharedKeyAlgName, passcode, ivsaltHex);
var sharedKeyHex = sharedKeyInfo.keyhex;
// alert("sharedKeyHex = " + sharedKeyHex);
// 3. get encrypted Key in Base64
var encryptedKeyB64 = _encryptKeyHex(hPrvKey, sharedKeyAlgName, sharedKeyHex, ivsaltHex);
var pemBody = encryptedKeyB64.replace(/(.{64})/g, "$1\r\n");
var sPEM = "-----BEGIN " + pemHeadAlg + " PRIVATE KEY-----\r\n";
sPEM += "Proc-Type: 4,ENCRYPTED\r\n";
sPEM += "DEK-Info: " + sharedKeyAlgName + "," + ivsaltHex + "\r\n";
sPEM += "\r\n";
sPEM += pemBody;
sPEM += "\r\n-----END " + pemHeadAlg + " PRIVATE KEY-----\r\n";
return sPEM;
},
// === PKCS8 ===============================================================
/**
* generate PBKDF2 key hexstring with specified passcode and information
* @name parseHexOfEncryptedPKCS8
* @memberOf KEYUTIL
* @function
* @param {String} passcode passcode to decrypto private key
* @return {Array} info associative array of PKCS#8 parameters
* @since pkcs5pkey 1.0.3
* @description
* The associative array which is returned by this method has following properties:
* <ul>
* <li>info.pbkdf2Salt - hexadecimal string of PBKDF2 salt</li>
* <li>info.pkbdf2Iter - iteration count</li>
* <li>info.ciphertext - hexadecimal string of encrypted private key</li>
* <li>info.encryptionSchemeAlg - encryption algorithm name (currently TripleDES only)</li>
* <li>info.encryptionSchemeIV - initial vector for encryption algorithm</li>
* </ul>
* Currently, this method only supports PKCS#5v2.0 with PBES2/PBDKF2 of HmacSHA1 and TripleDES.
* <ul>
* <li>keyDerivationFunc = pkcs5PBKDF2 with HmacSHA1</li>
* <li>encryptionScheme = des-EDE3-CBC(i.e. TripleDES</li>
* </ul>
* @example
* // to convert plain PKCS#5 private key to encrypted PKCS#8 private
* // key with PBKDF2 with TripleDES
* % openssl pkcs8 -in plain_p5.pem -topk8 -v2 -des3 -out encrypted_p8.pem
*/
parseHexOfEncryptedPKCS8: function(sHEX) {
var _ASN1HEX = ASN1HEX;
var _getChildIdx = _ASN1HEX.getChildIdx;
var _getV = _ASN1HEX.getV;
var info = {};
var a0 = _getChildIdx(sHEX, 0);
if (a0.length != 2)
throw "malformed format: SEQUENCE(0).items != 2: " + a0.length;
// 1. ciphertext
info.ciphertext = _getV(sHEX, a0[1]);
// 2. pkcs5PBES2
var a0_0 = _getChildIdx(sHEX, a0[0]);
if (a0_0.length != 2)
throw "malformed format: SEQUENCE(0.0).items != 2: " + a0_0.length;
// 2.1 check if pkcs5PBES2(1 2 840 113549 1 5 13)
if (_getV(sHEX, a0_0[0]) != "2a864886f70d01050d")
throw "this only supports pkcs5PBES2";
// 2.2 pkcs5PBES2 param
var a0_0_1 = _getChildIdx(sHEX, a0_0[1]);
if (a0_0.length != 2)
throw "malformed format: SEQUENCE(0.0.1).items != 2: " + a0_0_1.length;
// 2.2.1 encryptionScheme
var a0_0_1_1 = _getChildIdx(sHEX, a0_0_1[1]);
if (a0_0_1_1.length != 2)
throw "malformed format: SEQUENCE(0.0.1.1).items != 2: " + a0_0_1_1.length;
if (_getV(sHEX, a0_0_1_1[0]) != "2a864886f70d0307")
throw "this only supports TripleDES";
info.encryptionSchemeAlg = "TripleDES";
// 2.2.1.1 IV of encryptionScheme
info.encryptionSchemeIV = _getV(sHEX, a0_0_1_1[1]);
// 2.2.2 keyDerivationFunc
var a0_0_1_0 = _getChildIdx(sHEX, a0_0_1[0]);
if (a0_0_1_0.length != 2)
throw "malformed format: SEQUENCE(0.0.1.0).items != 2: " + a0_0_1_0.length;
if (_getV(sHEX, a0_0_1_0[0]) != "2a864886f70d01050c")
throw "this only supports pkcs5PBKDF2";
// 2.2.2.1 pkcs5PBKDF2 param
var a0_0_1_0_1 = _getChildIdx(sHEX, a0_0_1_0[1]);
if (a0_0_1_0_1.length < 2)
throw "malformed format: SEQUENCE(0.0.1.0.1).items < 2: " + a0_0_1_0_1.length;
// 2.2.2.1.1 PBKDF2 salt
info.pbkdf2Salt = _getV(sHEX, a0_0_1_0_1[0]);
// 2.2.2.1.2 PBKDF2 iter
var iterNumHex = _getV(sHEX, a0_0_1_0_1[1]);
try {
info.pbkdf2Iter = parseInt(iterNumHex, 16);
} catch(ex) {
throw "malformed format pbkdf2Iter: " + iterNumHex;
}
return info;
},
/**
* generate PBKDF2 key hexstring with specified passcode and information
* @name getPBKDF2KeyHexFromParam
* @memberOf KEYUTIL
* @function
* @param {Array} info result of {@link parseHexOfEncryptedPKCS8} which has preference of PKCS#8 file
* @param {String} passcode passcode to decrypto private key
* @return {String} hexadecimal string of PBKDF2 key
* @since pkcs5pkey 1.0.3
* @description
* As for info, this uses following properties:
* <ul>
* <li>info.pbkdf2Salt - hexadecimal string of PBKDF2 salt</li>
* <li>info.pkbdf2Iter - iteration count</li>
* </ul>
* Currently, this method only supports PKCS#5v2.0 with PBES2/PBDKF2 of HmacSHA1 and TripleDES.
* <ul>
* <li>keyDerivationFunc = pkcs5PBKDF2 with HmacSHA1</li>
* <li>encryptionScheme = des-EDE3-CBC(i.e. TripleDES</li>
* </ul>
* @example
* // to convert plain PKCS#5 private key to encrypted PKCS#8 private
* // key with PBKDF2 with TripleDES
* % openssl pkcs8 -in plain_p5.pem -topk8 -v2 -des3 -out encrypted_p8.pem
*/
getPBKDF2KeyHexFromParam: function(info, passcode) {
var pbkdf2SaltWS = CryptoJS.enc.Hex.parse(info.pbkdf2Salt);
var pbkdf2Iter = info.pbkdf2Iter;
var pbkdf2KeyWS = CryptoJS.PBKDF2(passcode,
pbkdf2SaltWS,
{ keySize: 192/32, iterations: pbkdf2Iter });
var pbkdf2KeyHex = CryptoJS.enc.Hex.stringify(pbkdf2KeyWS);
return pbkdf2KeyHex;
},
/*
* read PEM formatted encrypted PKCS#8 private key and returns hexadecimal string of plain PKCS#8 private key
* @name getPlainPKCS8HexFromEncryptedPKCS8PEM
* @memberOf KEYUTIL
* @function
* @param {String} pkcs8PEM PEM formatted encrypted PKCS#8 private key
* @param {String} passcode passcode to decrypto private key
* @return {String} hexadecimal string of plain PKCS#8 private key
* @since pkcs5pkey 1.0.3
* @description
* Currently, this method only supports PKCS#5v2.0 with PBES2/PBDKF2 of HmacSHA1 and TripleDES.
* <ul>
* <li>keyDerivationFunc = pkcs5PBKDF2 with HmacSHA1</li>
* <li>encryptionScheme = des-EDE3-CBC(i.e. TripleDES</li>
* </ul>
* @example
* // to convert plain PKCS#5 private key to encrypted PKCS#8 private
* // key with PBKDF2 with TripleDES
* % openssl pkcs8 -in plain_p5.pem -topk8 -v2 -des3 -out encrypted_p8.pem
*/
_getPlainPKCS8HexFromEncryptedPKCS8PEM: function(pkcs8PEM, passcode) {
// 1. derHex - PKCS#8 private key encrypted by PBKDF2
var derHex = pemtohex(pkcs8PEM, "ENCRYPTED PRIVATE KEY");
// 2. info - PKCS#5 PBES info
var info = this.parseHexOfEncryptedPKCS8(derHex);
// 3. hKey - PBKDF2 key
var pbkdf2KeyHex = KEYUTIL.getPBKDF2KeyHexFromParam(info, passcode);
// 4. decrypt ciphertext by PBKDF2 key
var encrypted = {};
encrypted.ciphertext = CryptoJS.enc.Hex.parse(info.ciphertext);
var pbkdf2KeyWS = CryptoJS.enc.Hex.parse(pbkdf2KeyHex);
var des3IVWS = CryptoJS.enc.Hex.parse(info.encryptionSchemeIV);
var decWS = CryptoJS.TripleDES.decrypt(encrypted, pbkdf2KeyWS, { iv: des3IVWS });
var decHex = CryptoJS.enc.Hex.stringify(decWS);
return decHex;
},
/**
* get RSAKey/ECDSA private key object from encrypted PEM PKCS#8 private key
* @name getKeyFromEncryptedPKCS8PEM
* @memberOf KEYUTIL
* @function
* @param {String} pkcs8PEM string of PEM formatted PKCS#8 private key
* @param {String} passcode passcode string to decrypt key
* @return {Object} RSAKey or KJUR.crypto.ECDSA private key object
* @since pkcs5pkey 1.0.5
*/
getKeyFromEncryptedPKCS8PEM: function(pkcs8PEM, passcode) {
var prvKeyHex = this._getPlainPKCS8HexFromEncryptedPKCS8PEM(pkcs8PEM, passcode);
var key = this.getKeyFromPlainPrivatePKCS8Hex(prvKeyHex);
return key;
},
/**
* parse hexadecimal string of plain PKCS#8 private key
* @name parsePlainPrivatePKCS8Hex
* @memberOf KEYUTIL
* @function
* @param {String} pkcs8PrvHex hexadecimal string of PKCS#8 plain private key
* @return {Array} associative array of parsed key
* @since pkcs5pkey 1.0.5
* @description
* Resulted associative array has following properties:
* <ul>
* <li>algoid - hexadecimal string of OID of asymmetric key algorithm</li>
* <li>algparam - hexadecimal string of OID of ECC curve name or null</li>
* <li>keyidx - string starting index of key in pkcs8PrvHex</li>
* </ul>
*/
parsePlainPrivatePKCS8Hex: function(pkcs8PrvHex) {
var _ASN1HEX = ASN1HEX;
var _getChildIdx = _ASN1HEX.getChildIdx;
var _getV = _ASN1HEX.getV;
var result = {};
result.algparam = null;
// 1. sequence
if (pkcs8PrvHex.substr(0, 2) != "30")
throw "malformed plain PKCS8 private key(code:001)"; // not sequence
var a1 = _getChildIdx(pkcs8PrvHex, 0);
if (a1.length != 3)
throw "malformed plain PKCS8 private key(code:002)";
// 2. AlgID
if (pkcs8PrvHex.substr(a1[1], 2) != "30")
throw "malformed PKCS8 private key(code:003)"; // AlgId not sequence
var a2 = _getChildIdx(pkcs8PrvHex, a1[1]);
if (a2.length != 2)
throw "malformed PKCS8 private key(code:004)"; // AlgId not have two elements
// 2.1. AlgID OID
if (pkcs8PrvHex.substr(a2[0], 2) != "06")
throw "malformed PKCS8 private key(code:005)"; // AlgId.oid is not OID
result.algoid = _getV(pkcs8PrvHex, a2[0]);
// 2.2. AlgID param
if (pkcs8PrvHex.substr(a2[1], 2) == "06") {
result.algparam = _getV(pkcs8PrvHex, a2[1]);
}
// 3. Key index
if (pkcs8PrvHex.substr(a1[2], 2) != "04")
throw "malformed PKCS8 private key(code:006)"; // not octet string
result.keyidx = _ASN1HEX.getVidx(pkcs8PrvHex, a1[2]);
return result;
},
/**
* get RSAKey/ECDSA private key object from PEM plain PEM PKCS#8 private key
* @name getKeyFromPlainPrivatePKCS8PEM
* @memberOf KEYUTIL
* @function
* @param {String} pkcs8PEM string of plain PEM formatted PKCS#8 private key
* @return {Object} RSAKey or KJUR.crypto.ECDSA private key object
* @since pkcs5pkey 1.0.5
*/
getKeyFromPlainPrivatePKCS8PEM: function(prvKeyPEM) {
var prvKeyHex = pemtohex(prvKeyPEM, "PRIVATE KEY");
var key = this.getKeyFromPlainPrivatePKCS8Hex(prvKeyHex);
return key;
},
/**
* get RSAKey/DSA/ECDSA private key object from HEX plain PEM PKCS#8 private key
* @name getKeyFromPlainPrivatePKCS8Hex
* @memberOf KEYUTIL
* @function
* @param {String} prvKeyHex hexadecimal string of plain PKCS#8 private key
* @return {Object} RSAKey or KJUR.crypto.{DSA,ECDSA} private key object
* @since pkcs5pkey 1.0.5
*/
getKeyFromPlainPrivatePKCS8Hex: function(prvKeyHex) {
var p8 = this.parsePlainPrivatePKCS8Hex(prvKeyHex);
var key;
if (p8.algoid == "2a864886f70d010101") { // RSA
key = new RSAKey();
} else if (p8.algoid == "2a8648ce380401") { // DSA
key = new KJUR.crypto.DSA();
} else if (p8.algoid == "2a8648ce3d0201") { // ECC
key = new KJUR.crypto.ECDSA();
} else {
throw "unsupported private key algorithm";
}
key.readPKCS8PrvKeyHex(prvKeyHex);
return key;
},
// === PKCS8 RSA Public Key ================================================
/*
* get RSAKey/DSA/ECDSA public key object from hexadecimal string of PKCS#8 public key
* @name _getKeyFromPublicPKCS8Hex
* @memberOf KEYUTIL
* @function
* @param {String} pkcsPub8Hex hexadecimal string of PKCS#8 public key
* @return {Object} RSAKey or KJUR.crypto.{ECDSA,DSA} private key object
* @since pkcs5pkey 1.0.5
*/
_getKeyFromPublicPKCS8Hex: function(h) {
var key;
var hOID = ASN1HEX.getVbyList(h, 0, [0, 0], "06");
if (hOID === "2a864886f70d010101") { // oid=RSA
key = new RSAKey();
} else if (hOID === "2a8648ce380401") { // oid=DSA
key = new KJUR.crypto.DSA();
} else if (hOID === "2a8648ce3d0201") { // oid=ECPUB
key = new KJUR.crypto.ECDSA();
} else {
throw "unsupported PKCS#8 public key hex";
}
key.readPKCS8PubKeyHex(h);
return key;
},
/**
* parse hexadecimal string of plain PKCS#8 private key
* @name parsePublicRawRSAKeyHex
* @memberOf KEYUTIL
* @function
* @param {String} pubRawRSAHex hexadecimal string of ASN.1 encoded PKCS#8 public key
* @return {Array} associative array of parsed key
* @since pkcs5pkey 1.0.5
* @description
* Resulted associative array has following properties:
* <ul>
* <li>n - hexadecimal string of public key
* <li>e - hexadecimal string of public exponent
* </ul>
*/
parsePublicRawRSAKeyHex: function(pubRawRSAHex) {
var _ASN1HEX = ASN1HEX;
var _getChildIdx = _ASN1HEX.getChildIdx;
var _getV = _ASN1HEX.getV;
var result = {};
// 1. Sequence
if (pubRawRSAHex.substr(0, 2) != "30")
throw "malformed RSA key(code:001)"; // not sequence
var a1 = _getChildIdx(pubRawRSAHex, 0);
if (a1.length != 2)
throw "malformed RSA key(code:002)"; // not 2 items in seq
// 2. public key "N"
if (pubRawRSAHex.substr(a1[0], 2) != "02")
throw "malformed RSA key(code:003)"; // 1st item is not integer
result.n = _getV(pubRawRSAHex, a1[0]);
// 3. public key "E"
if (pubRawRSAHex.substr(a1[1], 2) != "02")
throw "malformed RSA key(code:004)"; // 2nd item is not integer
result.e = _getV(pubRawRSAHex, a1[1]);
return result;
},
/**
* parse hexadecimal string of PKCS#8 RSA/EC/DSA public key
* @name parsePublicPKCS8Hex
* @memberOf KEYUTIL
* @function
* @param {String} pkcs8PubHex hexadecimal string of PKCS#8 public key
* @return {Hash} hash of key information
* @description
* Resulted hash has following attributes.
* <ul>
* <li>algoid - hexadecimal string of OID of asymmetric key algorithm</li>
* <li>algparam - hexadecimal string of OID of ECC curve name, parameter SEQUENCE of DSA or null</li>
* <li>key - hexadecimal string of public key</li>
* </ul>
*/
parsePublicPKCS8Hex: function(pkcs8PubHex) {
var _ASN1HEX = ASN1HEX;
var _getChildIdx = _ASN1HEX.getChildIdx;
var _getV = _ASN1HEX.getV;
var result = {};
result.algparam = null;
// 1. AlgID and Key bit string
var a1 = _getChildIdx(pkcs8PubHex, 0);
if (a1.length != 2)
throw "outer DERSequence shall have 2 elements: " + a1.length;
// 2. AlgID
var idxAlgIdTLV = a1[0];
if (pkcs8PubHex.substr(idxAlgIdTLV, 2) != "30")
throw "malformed PKCS8 public key(code:001)"; // AlgId not sequence
var a2 = _getChildIdx(pkcs8PubHex, idxAlgIdTLV);
if (a2.length != 2)
throw "malformed PKCS8 public key(code:002)"; // AlgId not have two elements
// 2.1. AlgID OID
if (pkcs8PubHex.substr(a2[0], 2) != "06")
throw "malformed PKCS8 public key(code:003)"; // AlgId.oid is not OID
result.algoid = _getV(pkcs8PubHex, a2[0]);
// 2.2. AlgID param
if (pkcs8PubHex.substr(a2[1], 2) == "06") { // OID for EC
result.algparam = _getV(pkcs8PubHex, a2[1]);
} else if (pkcs8PubHex.substr(a2[1], 2) == "30") { // SEQ for DSA
result.algparam = {};
result.algparam.p = _ASN1HEX.getVbyList(pkcs8PubHex, a2[1], [0], "02");
result.algparam.q = _ASN1HEX.getVbyList(pkcs8PubHex, a2[1], [1], "02");
result.algparam.g = _ASN1HEX.getVbyList(pkcs8PubHex, a2[1], [2], "02");
}
// 3. Key
if (pkcs8PubHex.substr(a1[1], 2) != "03")
throw "malformed PKCS8 public key(code:004)"; // Key is not bit string
result.key = _getV(pkcs8PubHex, a1[1]).substr(2);
// 4. return result assoc array
return result;
},
};
}();
// -- MAJOR PUBLIC METHODS -------------------------------------------------------
/**
* get private or public key object from any arguments
* @name getKey
* @memberOf KEYUTIL
* @function
* @static
* @param {Object} param parameter to get key object. see description in detail.
* @param {String} passcode (OPTION) parameter to get key object. see description in detail.
* @param {String} hextype (OPTOIN) parameter to get key object. see description in detail.
* @return {Object} {@link RSAKey}, {@link KJUR.crypto.ECDSA} or {@link KJUR.crypto.ECDSA} object
* @since keyutil 1.0.0
* @description
* This method gets private or public key object({@link RSAKey}, {@link KJUR.crypto.DSA} or {@link KJUR.crypto.ECDSA})
* for RSA, DSA and ECC.
* Arguments for this methods depends on a key format you specify.
* Following key representations are supported.
* <ul>
* <li>ECC private/public key object(as is): param=KJUR.crypto.ECDSA</li>
* <li>DSA private/public key object(as is): param=KJUR.crypto.DSA</li>
* <li>RSA private/public key object(as is): param=RSAKey </li>
* <li>ECC private key parameters: param={d: d, curve: curveName}</li>
* <li>RSA private key parameters: param={n: n, e: e, d: d, p: p, q: q, dp: dp, dq: dq, co: co}<br/>
* NOTE: Each value shall be hexadecimal string of key spec.</li>
* <li>DSA private key parameters: param={p: p, q: q, g: g, y: y, x: x}<br/>
* NOTE: Each value shall be hexadecimal string of key spec.</li>
* <li>ECC public key parameters: param={xy: xy, curve: curveName}<br/>
* NOTE: ECC public key 'xy' shall be concatination of "04", x-bytes-hex and y-bytes-hex.</li>
* <li>DSA public key parameters: param={p: p, q: q, g: g, y: y}<br/>
* NOTE: Each value shall be hexadecimal string of key spec.</li>
* <li>RSA public key parameters: param={n: n, e: e} </li>
* <li>X.509v1/v3 PEM certificate (RSA/DSA/ECC): param=pemString</li>
* <li>PKCS#8 hexadecimal RSA/ECC public key: param=pemString, null, "pkcs8pub"</li>
* <li>PKCS#8 PEM RSA/DSA/ECC public key: param=pemString</li>
* <li>PKCS#5 plain hexadecimal RSA private key: param=hexString, null, "pkcs5prv"</li>
* <li>PKCS#5 plain PEM DSA/RSA private key: param=pemString</li>
* <li>PKCS#8 plain PEM RSA/ECDSA private key: param=pemString</li>
* <li>PKCS#5 encrypted PEM RSA/DSA private key: param=pemString, passcode</li>
* <li>PKCS#8 encrypted PEM RSA/ECDSA private key: param=pemString, passcode</li>
* </ul>
* Please note following limitation on encrypted keys:
* <ul>
* <li>Encrypted PKCS#8 only supports PBKDF2/HmacSHA1/3DES</li>
* <li>Encrypted PKCS#5 supports DES-CBC, DES-EDE3-CBC, AES-{128,192.256}-CBC</li>
* <li>JWT plain ECC private/public key</li>
* <li>JWT plain RSA public key</li>
* <li>JWT plain RSA private key with P/Q/DP/DQ/COEFF</li>
* <li>JWT plain RSA private key without P/Q/DP/DQ/COEFF (since jsrsasign 5.0.0)</li>
* </ul>
* NOTE1: <a href="https://tools.ietf.org/html/rfc7517">RFC 7517 JSON Web Key(JWK)</a> support for RSA/ECC private/public key from jsrsasign 4.8.1.<br/>
* NOTE2: X509v1 support is added since jsrsasign 5.0.11.
*
* <h5>EXAMPLE</h5>
* @example
* // 1. loading private key from PEM string
* keyObj = KEYUTIL.getKey("-----BEGIN RSA PRIVATE KEY...");
* keyObj = KEYUTIL.getKey("-----BEGIN RSA PRIVATE KEY..., "passcode");
* keyObj = KEYUTIL.getKey("-----BEGIN PRIVATE KEY...");
* keyObj = KEYUTIL.getKey("-----BEGIN PRIVATE KEY...", "passcode");
* // 2. loading public key from PEM string
* keyObj = KEYUTIL.getKey("-----BEGIN PUBLIC KEY...");
* keyObj = KEYUTIL.getKey("-----BEGIN X509 CERTIFICATE...");
* // 3. loading hexadecimal PKCS#5/PKCS#8 key
* keyObj = KEYUTIL.getKey("308205c1...", null, "pkcs8pub");
* keyObj = KEYUTIL.getKey("3082048b...", null, "pkcs5prv");
* // 4. loading JSON Web Key(JWK)
* keyObj = KEYUTIL.getKey({kty: "RSA", n: "0vx7...", e: "AQAB"});
* keyObj = KEYUTIL.getKey({kty: "EC", crv: "P-256",
* x: "MKBC...", y: "4Etl6...", d: "870Mb..."});
* // 5. bare hexadecimal key
* keyObj = KEYUTIL.getKey({n: "75ab..", e: "010001"});
*/
KEYUTIL.getKey = function(param, passcode, hextype) {
var _ASN1HEX = ASN1HEX,
_getChildIdx = _ASN1HEX.getChildIdx,
_getV = _ASN1HEX.getV,
_getVbyList = _ASN1HEX.getVbyList,
_KJUR_crypto = KJUR.crypto,
_KJUR_crypto_ECDSA = _KJUR_crypto.ECDSA,
_KJUR_crypto_DSA = _KJUR_crypto.DSA,
_RSAKey = RSAKey,
_pemtohex = pemtohex,
_KEYUTIL = KEYUTIL;
// 1. by key RSAKey/KJUR.crypto.ECDSA/KJUR.crypto.DSA object
if (typeof _RSAKey != 'undefined' && param instanceof _RSAKey)
return param;
if (typeof _KJUR_crypto_ECDSA != 'undefined' && param instanceof _KJUR_crypto_ECDSA)
return param;
if (typeof _KJUR_crypto_DSA != 'undefined' && param instanceof _KJUR_crypto_DSA)
return param;
// 2. by parameters of key
// 2.1. bare ECC
// 2.1.1. bare ECC public key by hex values
if (param.curve !== undefined &&
param.xy !== undefined && param.d === undefined) {
return new _KJUR_crypto_ECDSA({pub: param.xy, curve: param.curve});
}
// 2.1.2. bare ECC private key by hex values
if (param.curve !== undefined && param.d !== undefined) {
return new _KJUR_crypto_ECDSA({prv: param.d, curve: param.curve});
}
// 2.2. bare RSA
// 2.2.1. bare RSA public key by hex values
if (param.kty === undefined &&
param.n !== undefined && param.e !== undefined &&
param.d === undefined) {
var key = new _RSAKey();
key.setPublic(param.n, param.e);
return key;
}
// 2.2.2. bare RSA private key with P/Q/DP/DQ/COEFF by hex values
if (param.kty === undefined &&
param.n !== undefined &&
param.e !== undefined &&
param.d !== undefined &&
param.p !== undefined &&
param.q !== undefined &&
param.dp !== undefined &&
param.dq !== undefined &&
param.co !== undefined &&
param.qi === undefined) {
var key = new _RSAKey();
key.setPrivateEx(param.n, param.e, param.d, param.p, param.q,
param.dp, param.dq, param.co);
return key;
}
// 2.2.3. bare RSA public key without P/Q/DP/DQ/COEFF by hex values
if (param.kty === undefined &&
param.n !== undefined &&
param.e !== undefined &&
param.d !== undefined &&
param.p === undefined) {
var key = new _RSAKey();
key.setPrivate(param.n, param.e, param.d);
return key;
}
// 2.3. bare DSA
// 2.3.1. bare DSA public key by hex values
if (param.p !== undefined && param.q !== undefined &&
param.g !== undefined &&
param.y !== undefined && param.x === undefined) {
var key = new _KJUR_crypto_DSA();
key.setPublic(param.p, param.q, param.g, param.y);
return key;
}
// 2.3.2. bare DSA private key by hex values
if (param.p !== undefined && param.q !== undefined &&
param.g !== undefined &&
param.y !== undefined && param.x !== undefined) {
var key = new _KJUR_crypto_DSA();
key.setPrivate(param.p, param.q, param.g, param.y, param.x);
return key;
}
// 3. JWK
// 3.1. JWK RSA
// 3.1.1. JWK RSA public key by b64u values
if (param.kty === "RSA" &&
param.n !== undefined &&
param.e !== undefined &&
param.d === undefined) {
var key = new _RSAKey();
key.setPublic(b64utohex(param.n), b64utohex(param.e));
return key;
}
// 3.1.2. JWK RSA private key with p/q/dp/dq/coeff by b64u values
if (param.kty === "RSA" &&
param.n !== undefined &&
param.e !== undefined &&
param.d !== undefined &&
param.p !== undefined &&
param.q !== undefined &&
param.dp !== undefined &&
param.dq !== undefined &&
param.qi !== undefined) {
var key = new _RSAKey();
key.setPrivateEx(b64utohex(param.n),
b64utohex(param.e),
b64utohex(param.d),
b64utohex(param.p),
b64utohex(param.q),