How to use the pkcs11js.CKA_MODULUS_BITS function in pkcs11js

subject: { v: pkcs11.CKA_SUBJECT, t: TYPE_BUFFER },
  id: { v: pkcs11.CKA_ID, t: TYPE_BUFFER },
  sensitive: { v: pkcs11.CKA_SENSITIVE, t: TYPE_BOOL },
  encrypt: { v: pkcs11.CKA_ENCRYPT, t: TYPE_BOOL },
  decrypt: { v: pkcs11.CKA_DECRYPT, t: TYPE_BOOL },
  wrap: { v: pkcs11.CKA_WRAP, t: TYPE_BOOL },
  unwrap: { v: pkcs11.CKA_UNWRAP, t: TYPE_BOOL },
  sign: { v: pkcs11.CKA_SIGN, t: TYPE_BOOL },
  signRecover: { v: pkcs11.CKA_SIGN_RECOVER, t: TYPE_BOOL },
  verify: { v: pkcs11.CKA_VERIFY, t: TYPE_BOOL },
  verifyRecover: { v: pkcs11.CKA_VERIFY_RECOVER, t: TYPE_BOOL },
  derive: { v: pkcs11.CKA_DERIVE, t: TYPE_BOOL },
  startDate: { v: pkcs11.CKA_START_DATE, t: TYPE_DATE },
  endDate: { v: pkcs11.CKA_END_DATE, t: TYPE_DATE },
  modulus: { v: pkcs11.CKA_MODULUS, t: TYPE_BUFFER },
  modulusBits: { v: pkcs11.CKA_MODULUS_BITS, t: TYPE_NUMBER },
  publicExponent: { v: pkcs11.CKA_PUBLIC_EXPONENT, t: TYPE_BUFFER },
  privateExponent: { v: pkcs11.CKA_PRIVATE_EXPONENT, t: TYPE_BUFFER },
  prime1: { v: pkcs11.CKA_PRIME_1, t: TYPE_BUFFER },
  prime2: { v: pkcs11.CKA_PRIME_2, t: TYPE_BUFFER },
  exp1: { v: pkcs11.CKA_EXPONENT_1, t: TYPE_BUFFER },
  exp2: { v: pkcs11.CKA_EXPONENT_2, t: TYPE_BUFFER },
  coefficient: { v: pkcs11.CKA_COEFFICIENT, t: TYPE_BUFFER },
  prime: { v: pkcs11.CKA_PRIME, t: TYPE_BUFFER },
  subprime: { v: pkcs11.CKA_SUBPRIME, t: TYPE_BUFFER },
  base: { v: pkcs11.CKA_BASE, t: TYPE_BUFFER },

  /* CKA_PRIME_BITS and CKA_SUB_PRIME_BITS are new for v2.11 */
  primeBits: { v: pkcs11.CKA_PRIME_BITS, t: TYPE_NUMBER },
  subprimeBits: { v: pkcs11.CKA_SUBPRIME_BITS, t: TYPE_NUMBER },
  /* (To retain backwards-compatibility) */

it("#1", () => {
            const privateTemplate = [
                { type: pkcs11.CKA_ID, value: new Buffer("1234567890") },
                { type: pkcs11.CKA_SIGN, value: true },
                { type: pkcs11.CKA_DECRYPT, value: true },
                { type: pkcs11.CKA_UNWRAP, value: true },
            ];
            const publicTemplate = [
                { type: pkcs11.CKA_ID, value: new Buffer("1234567890") },
                { type: pkcs11.CKA_PUBLIC_EXPONENT, value: new Buffer([1, 0, 1]) },
                { type: pkcs11.CKA_MODULUS_BITS, value: 1024 },
                { type: pkcs11.CKA_VERIFY, value: true },
                { type: pkcs11.CKA_ENCRYPT, value: true },
                { type: pkcs11.CKA_WRAP, value: true },
            ];

            const keys = mod.C_GenerateKeyPair(session, { mechanism: pkcs11.CKM_RSA_PKCS_KEY_PAIR_GEN, parameter: null }, publicTemplate, privateTemplate);

            let attrs = mod.C_GetAttributeValue(session, keys.privateKey, [
                { type: pkcs11.CKA_TOKEN }
            ]);
        });
    });

before(() => {
            const privateTemplate = [
                { type: pkcs11.CKA_ID, value: new Buffer("1234567890") },
                { type: pkcs11.CKA_SIGN, value: true },
            ];
            const publicTemplate = [
                { type: pkcs11.CKA_ID, value: new Buffer("1234567890") },
                { type: pkcs11.CKA_PUBLIC_EXPONENT, value: new Buffer([1, 0, 1]) },
                { type: pkcs11.CKA_MODULUS_BITS, value: 1024 },
                { type: pkcs11.CKA_VERIFY, value: true },
            ];

            const keys = mod.C_GenerateKeyPair(session, { mechanism: pkcs11.CKM_RSA_PKCS_KEY_PAIR_GEN, parameter: null }, publicTemplate, privateTemplate);

            privateKey = keys.privateKey;
            publicKey = keys.publicKey;
        });

subject: { v: pkcs11.CKA_SUBJECT, t: TYPE_BUFFER },
    id: { v: pkcs11.CKA_ID, t: TYPE_BUFFER },
    sensitive: { v: pkcs11.CKA_SENSITIVE, t: TYPE_BOOL },
    encrypt: { v: pkcs11.CKA_ENCRYPT, t: TYPE_BOOL },
    decrypt: { v: pkcs11.CKA_DECRYPT, t: TYPE_BOOL },
    wrap: { v: pkcs11.CKA_WRAP, t: TYPE_BOOL },
    unwrap: { v: pkcs11.CKA_UNWRAP, t: TYPE_BOOL },
    sign: { v: pkcs11.CKA_SIGN, t: TYPE_BOOL },
    signRecover: { v: pkcs11.CKA_SIGN_RECOVER, t: TYPE_BOOL },
    verify: { v: pkcs11.CKA_VERIFY, t: TYPE_BOOL },
    verifyRecover: { v: pkcs11.CKA_VERIFY_RECOVER, t: TYPE_BOOL },
    derive: { v: pkcs11.CKA_DERIVE, t: TYPE_BOOL },
    startDate: { v: pkcs11.CKA_START_DATE, t: TYPE_DATE },
    endDate: { v: pkcs11.CKA_END_DATE, t: TYPE_DATE },
    modulus: { v: pkcs11.CKA_MODULUS, t: TYPE_BUFFER },
    modulusBits: { v: pkcs11.CKA_MODULUS_BITS, t: TYPE_NUMBER },
    publicExponent: { v: pkcs11.CKA_PUBLIC_EXPONENT, t: TYPE_BUFFER },
    privateExponent: { v: pkcs11.CKA_PRIVATE_EXPONENT, t: TYPE_BUFFER },
    prime1: { v: pkcs11.CKA_PRIME_1, t: TYPE_BUFFER },
    prime2: { v: pkcs11.CKA_PRIME_2, t: TYPE_BUFFER },
    exp1: { v: pkcs11.CKA_EXPONENT_1, t: TYPE_BUFFER },
    exp2: { v: pkcs11.CKA_EXPONENT_2, t: TYPE_BUFFER },
    coefficient: { v: pkcs11.CKA_COEFFICIENT, t: TYPE_BUFFER },
    prime: { v: pkcs11.CKA_PRIME, t: TYPE_BUFFER },
    subprime: { v: pkcs11.CKA_SUBPRIME, t: TYPE_BUFFER },
    base: { v: pkcs11.CKA_BASE, t: TYPE_BUFFER },
    primeBits: { v: pkcs11.CKA_PRIME_BITS, t: TYPE_NUMBER },
    subprimeBits: { v: pkcs11.CKA_SUBPRIME_BITS, t: TYPE_NUMBER },
    valueBits: { v: pkcs11.CKA_VALUE_BITS, t: TYPE_NUMBER },
    valueLen: { v: pkcs11.CKA_VALUE_LEN, t: TYPE_NUMBER },
    extractable: { v: pkcs11.CKA_EXTRACTABLE, t: TYPE_BOOL },
    local: { v: pkcs11.CKA_LOCAL, t: TYPE_BOOL },