PKCS11js

We make a package called Graphene, it provides a simplistic Object Oriented interface for interacting with PKCS#11 devices, for most people this is the right level to build on. In some cases you may want to interact directly with the PKCS#11 API, if so PKCS11js is the package for you.

PKCS#11 (also known as CryptoKI or PKCS11) is the standard interface for interacting with hardware crypto devices such as Smart Cards and Hardware Security Modules (HSMs).

This was developed to the PKCS#11 2.30 specification, the 2.40 headers were not available at the time we created this, it should be easy enough to extend it for the new version at a later date.

It has been tested with :

NOTE: For testing purposes it may be easier to work with SoftHSM2 which is a software implementation of PKCS#11 based on OpenSSL or Botan.

Installation

$ npm install pkcs11js

Documentation

https://peculiarventures.github.io/pkcs11js/

Install SoftHSM2

For OSX see the instructions here
For linux instructions here
For Windows instructions here

Examples

Example #1

var pkcs11js = require("pkcs11js");

var pkcs11 = new pkcs11js.PKCS11();
pkcs11.load("/usr/local/lib/softhsm/libsofthsm2.so");

pkcs11.C_Initialize();

try {
    // Getting info about PKCS11 Module
    var module_info = pkcs11.C_GetInfo();

    // Getting list of slots
    var slots = pkcs11.C_GetSlotList(true);
    var slot = slots[0];

    // Getting info about slot
    var slot_info = pkcs11.C_GetSlotInfo(slot);
    // Getting info about token
    var token_info = pkcs11.C_GetTokenInfo(slot);

    // Getting info about Mechanism
    var mechs = pkcs11.C_GetMechanismList(slot);
    var mech_info = pkcs11.C_GetMechanismInfo(slot, mechs[0]);

    var session = pkcs11.C_OpenSession(slot, pkcs11js.CKF_RW_SESSION | pkcs11js.CKF_SERIAL_SESSION);

    // Getting info about Session
    var info = pkcs11.C_GetSessionInfo(session);
    pkcs11.C_Login(session, 1, "password");

    /**
     * Your app code here
     */
    
    pkcs11.C_Logout(session);
    pkcs11.C_CloseSession(session);
}
catch(e){
    console.error(e);
}
finally {
    pkcs11.C_Finalize();
}

Example #2

Generating secret key using AES mechanism

var template = [
    { type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_SECRET_KEY },
    { type: pkcs11js.CKA_TOKEN, value: false },
    { type: pkcs11js.CKA_LABEL, value: "My AES Key" },
    { type: pkcs11js.CKA_VALUE_LEN, value: 256 / 8 },
    { type: pkcs11js.CKA_ENCRYPT, value: true },
    { type: pkcs11js.CKA_DECRYPT, value: true },
];
var key = pkcs11.C_GenerateKey(session, { mechanism: pkcs11js.CKM_AES_KEY_GEN }, template);

Example #3

Generating key pair using RSA-PKCS1 mechanism

var publicKeyTemplate = [
    { type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_PUBLIC_KEY },
    { type: pkcs11js.CKA_TOKEN, value: false },
    { type: pkcs11js.CKA_LABEL, value: "My RSA Public Key" },
    { type: pkcs11js.CKA_PUBLIC_EXPONENT, value: new Buffer([1, 0, 1]) },
    { type: pkcs11js.CKA_MODULUS_BITS, value: 2048 },
    { type: pkcs11js.CKA_VERIFY, value: true }
];
var privateKeyTemplate = [
    { type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_PRIVATE_KEY },
    { type: pkcs11js.CKA_TOKEN, value: false },
    { type: pkcs11js.CKA_LABEL, value: "My RSA Private Key" },
    { type: pkcs11js.CKA_SIGN, value: true },
];
var keys = pkcs11.C_GenerateKeyPair(session, { mechanism: pkcs11js.CKM_RSA_PKCS_KEY_PAIR_GEN }, publicKeyTemplate, privateKeyTemplate);

Example #4

Generating key pair using ECDSA mechanism

var publicKeyTemplate = [
    { type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_PUBLIC_KEY },
    { type: pkcs11js.CKA_TOKEN, value: false },
    { type: pkcs11js.CKA_LABEL, value: "My EC Public Key" },
    { type: pkcs11js.CKA_EC_PARAMS, value: new Buffer("06082A8648CE3D030107", "hex") }, // secp256r1
];
var privateKeyTemplate = [
    { type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_PRIVATE_KEY },
    { type: pkcs11js.CKA_TOKEN, value: false },
    { type: pkcs11js.CKA_LABEL, value: "My EC Private Key" },
    { type: pkcs11js.CKA_DERIVE, value: true },
];
var keys = pkcs11.C_GenerateKeyPair(session, { mechanism: pkcs11js.CKM_EC_KEY_PAIR_GEN }, publicKeyTemplate, privateKeyTemplate);

Example #4

Working with Object

var nObject = pkcs11.C_CreateObject(session, [
    { type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_DATA },
    { type: pkcs11js.CKA_TOKEN, value: false },
    { type: pkcs11js.CKA_PRIVATE, value: false },
    { type: pkcs11js.CKA_LABEL, value: "My custom data" },
]);

// Updating label of Object
pkcs11.C_SetAttributeValue(session, nObject, [{ type: pkcs11js.CKA_LABEL, value: "My custom data!!!" }]);

// Getting attribute value
var label = pkcs11.C_GetAttributeValue(session, nObject, [
    { type: pkcs11js.CKA_LABEL },
    { type: pkcs11js.CKA_TOKEN }
]);
console.log(label[0].value.toString()); // My custom data!!!
console.log(!!label[1].value[0]); // false

// Copying Object
var cObject = pkcs11.C_CopyObject(session, nObject, [
    { type: pkcs11js.CKA_CLASS},
    { type: pkcs11js.CKA_TOKEN},
    { type: pkcs11js.CKA_PRIVATE},
    { type: pkcs11js.CKA_LABEL},
]);

// Removing Object
pkcs11.C_DestroyObject(session, cObject);

Example #4

Searching objects

NOTE: If template is not set for C_FindObjectsInit, then C_FindObjects returns all objects from slot

pkcs11.C_FindObjectsInit(session, [{ type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_DATA }]);
var hObject = pkcs11.C_FindObjects(session);
while (hObject) {
    var attrs = pkcs11.C_GetAttributeValue(session, hObject, [
        { type: pkcs11js.CKA_CLASS },
        { type: pkcs11js.CKA_TOKEN },
        { type: pkcs11js.CKA_LABEL }
    ]);
    // Output info for objects from token only
    if (attrs[1].value[0]){
        console.log(`Object #${hObject}: ${attrs[2].value.toString()}`);
    }
    hObject = pkcs11.C_FindObjects(session);
}
pkcs11.C_FindObjectsFinal(session);

Example #5

Generating random values

var random = pkcs11.C_GenerateRandom(session, new Buffer(20));
console.log(random.toString("hex"));

var random = new Buffer(20);
pkcs11.C_GenerateRandom(session, random);
console.log(random.toString("hex"));

Example #6

Digest

pkcs11.C_DigestInit(_session, { mechanism: pkcs11js.CKM_SHA256 });

pkcs11.C_DigestUpdate(session, new Buffer("Incoming message 1"));
pkcs11.C_DigestUpdate(session, new Buffer("Incoming message N"));

var digest = pkcs11.C_DigestFinal(_session, Buffer(256 / 8));

console.log(digest.toString("hex"));

Example #7

Signing data

pkcs11.C_SignInit(session, { mechanism: pkcs11js.CKM_SHA256_RSA_PKCS }, keys.privateKey);

pkcs11.C_SignUpdate(session, new Buffer("Incoming message 1"));
pkcs11.C_SignUpdate(session, new Buffer("Incoming message N"));

var signature = pkcs11.C_SignFinal(session, Buffer(256));

Verifying data

pkcs11.C_VerifyInit(session, { mechanism: pkcs11js.CKM_SHA256_RSA_PKCS }, keys.publicKey);

pkcs11.C_VerifyUpdate(session, new Buffer("Incoming message 1"));
pkcs11.C_VerifyUpdate(session, new Buffer("Incoming message N"));

var verify = pkcs11.C_VerifyFinal(session, signature);

Example #8

Encrypting data with AES-CBC mechanism

var cbc_param = pkcs11.C_GenerateRandom(new Buffer(16));

pkcs11.C_EncryptInit(
    session,
    {
        mechanism: pkcs11js.CKM_AES_CBC,
        parameter: cbc_param
    },
    secretKey
);

var enc = new Buffer(0);
enc = Buffer.concat([enc, pkcs11.C_EncryptUpdate(session, new Buffer("Incoming data 1"), new Buffer(16))]);
enc = Buffer.concat([enc, pkcs11.C_EncryptUpdate(session, new Buffer("Incoming data N"), new Buffer(16))]);
enc = Buffer.concat([enc, pkcs11.C_EncryptFinal(session, new Buffer(16))]);

console.log(enc.toString("hex"));

Decrypting data with AES-CBC mechanism

pkcs11.C_DecryptInit(
    session,
    {
        mechanism: pkcs11js.CKM_AES_CBC,
        parameter: cbc_param
    },
    secretKey
);

var dec = new Buffer(0);
dec = Buffer.concat([dec, pkcs11.C_DecryptUpdate(session, enc, new Buffer(32))]);
dec = Buffer.concat([dec, pkcs11.C_DecryptFinal(session, new Buffer(16))]);

console.log(dec.toString());

Example #9

Deriving key with ECDH mechanism

// Receive public data from EC public key
var attrs = pkcs11.C_GetAttributeValue(session, publicKeyEC, [{ type: pkcs11js.CKA_EC_POINT }])
var ec = attrs[0].value;

var derivedKey = pkcs11.C_DeriveKey(
    session,
    {
        mechanism: pkcs11js.CKM_ECDH1_DERIVE,
        parameter: {
            type: pkcs11js.CK_PARAMS_EC_DH,
            kdf: 2,
            publicData: ec
        }
    },
    privateKeyEC,
    [
        { type: pkcs11js.CKA_CLASS, value: pkcs11js.CKO_SECRET_KEY },
        { type: pkcs11js.CKA_TOKEN, value: false },
        { type: pkcs11js.CKA_KEY_TYPE, value: pkcs11js.CKK_AES },
        { type: pkcs11js.CKA_LABEL, value: "Derived AES key" },
        { type: pkcs11js.CKA_ENCRYPT, value: true },
        { type: pkcs11js.CKA_VALUE_LEN, value: 256 / 8 }
    ]
);

Example #10

Initializing NSS crypto library

Use options parameter for C_Initialize function.

Type

interface InitializationOptions {
    /**
     * NSS library parameters
     */
    libraryParameters?: string;
    /**
     * bit flags specifying options for `C_Initialize`
     * - CKF_LIBRARY_CANT_CREATE_OS_THREADS. True if application threads which are executing calls to the library
     *   may not use native operating system calls to spawn new threads; false if they may
     * - CKF_OS_LOCKING_OK. True if the library can use the native operation system threading model for locking;
     *   false otherwise
     */
    flags?: number;
}
/**
 * Initializes the Cryptoki library
 * @param options Initialization options
 * Supports implementation of standard `CK_C_INITIALIZE_ARGS` and extended NSS format.
 * - if `options` is null or empty, it calls native `C_Initialize` with `NULL`
 * - if `options` doesn't have `libraryParameters`, it uses `CK_C_INITIALIZE_ARGS` structure
 * - if `options` has `libraryParameters`, it uses extended NSS structure
 */
C_Initialize(options?: InitializationOptions): void;

Code

const mod = new pkcs11.PKCS11();
mod.load("/usr/local/opt/nss/lib/libsoftokn3.dylib");

mod.C_Initialize({
    libraryParameters: "configdir='' certPrefix='' keyPrefix='' secmod='' flags=readOnly,noCertDB,noModDB,forceOpen,optimizeSpace",
});

// Your code here

mod.C_Finalize();

More info about NSS params for C_Initialize

Example #11

Detect if smartcard is removed with C_WaitForSlotEvent function

var pkcs11js = require("pkcs11js");
var pkcs11 = new pkcs11js.PKCS11();
// Need a compliant Cryptoki Version 2.01 or later
pkcs11.load("/usr/local/lib/softhsm/libsofthsm2.so");

pkcs11.C_Initialize();

var session;
var intervalId;

try {
    // Getting info about PKCS11 Module
    var module_info = pkcs11.C_GetInfo();

    // Getting list of slots
    var slots = pkcs11.C_GetSlotList(true);
    var slot = slots[0];
    console.log(slot);

    // Getting info about slot
    var slot_info = pkcs11.C_GetSlotInfo(slot);
    // Getting info about token
    var token_info = pkcs11.C_GetTokenInfo(slot);
    console.log(slot_info);

    // Getting info about Mechanism
    var mechs = pkcs11.C_GetMechanismList(slot);
    var mech_info = pkcs11.C_GetMechanismInfo(slot, mechs[0]);

    session = pkcs11.C_OpenSession(slot, pkcs11js.CKF_RW_SESSION | pkcs11js.CKF_SERIAL_SESSION);

    // Getting info about Session
    var info = pkcs11.C_GetSessionInfo(session);
    // pkcs11.C_Login(session, 1234, "password");

    intervalId = setInterval(() => {
        const rv = pkcs11.C_WaitForSlotEvent(pkcs11js.CKF_DONT_BLOCK, slot);
        console.log('C_WaitForSlotEvent value : ' + rv.readUInt8(0));

        if (rv.readUInt8(0) !== pkcs11js.CKR_NO_EVENT) {
            /**
             * Your code here to handle token removal for example
             */
        }
    }, 1000);

    /**
     * Your app code here
     */
    
    // pkcs11.C_Logout(session);
}
catch(e){
    console.error(e);
    process.exit(1);
}
finally {
}

function myCleanup() {
    console.log('App specific cleanup code...');
    clearInterval(intervalId);
    try {
        if (session) {
            pkcs11.C_CloseSession(session);
            pkcs11.C_Finalize();
        }
    }
    catch(e){
    }
    console.log('Bye !');
};

process.on('SIGINT', myCleanup);

Suitability

At this time this solution should be considered suitable for research and experimentation, further code and security review is needed before utilization in a production application.

Bug Reporting

Please report bugs either as pull requests or as issues in the issue tracker. Graphene has a full disclosure vulnerability policy. Please do NOT attempt to report any security vulnerability in this code privately to anybody.

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PeculiarVentures / pkcs11js

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PKCS11js

Installation

Documentation

Install SoftHSM2

Examples

Example #1

Example #2

Example #3

Example #4

Example #4

Example #4

Example #5

Example #6

Example #7

Example #8

Example #9

Example #10

Example #11

Suitability

Bug Reporting

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