All files / lib/internal/crypto mac.js

86.73% Statements 183/211
68.89% Branches 31/45
100% Functions 3/3
86.73% Lines 183/211

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 21215x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 91x 91x 91x 91x 91x 87x 87x 87x 87x 87x 87x 87x 87x 1x 1x 1x 1x 56x 56x 56x         56x 56x 56x 56x 56x 56x 56x 56x 91x 15x 461x 461x 461x 461x 461x 461x 461x 461x 461x 460x 460x 461x 1x 1x 1x 1x 459x 459x 461x 1x 1x                   461x 453x 453x 453x 453x 452x 452x 452x 452x 452x 453x 453x 1x 1x 451x 451x 451x 451x 461x 5x 5x 4x 4x 4x 4x 4x 5x 5x     4x 4x 4x 4x 5x 5x     4x 4x 4x 4x 4x 4x       4x 4x 4x 4x 4x       4x       4x   4x 4x 4x 4x 4x 4x 4x 4x 461x   461x 455x 455x 455x 455x 455x 455x 455x 455x 455x 455x 455x 461x 15x 44x 44x 44x 44x 44x 44x 44x 44x 44x 44x 15x 15x 15x 15x 15x 15x  
'use strict';
 
const {
  ArrayFrom,
  Promise,
  SafeSet,
} = primordials;
 
const {
  HmacJob,
  KeyObjectHandle,
  kCryptoJobAsync,
  kSignJobModeSign,
  kSignJobModeVerify,
} = internalBinding('crypto');
 
const {
  getHashLength,
  hasAnyNotIn,
  jobPromise,
  lazyDOMException,
  normalizeHashName,
  validateBitLength,
  validateKeyOps,
  kHandle,
  kKeyObject,
} = require('internal/crypto/util');
 
const {
  codes: {
    ERR_MISSING_OPTION,
    ERR_INVALID_ARG_TYPE,
  }
} = require('internal/errors');
 
const {
  generateKey,
} = require('internal/crypto/keygen');
 
const {
  InternalCryptoKey,
  SecretKeyObject,
  createSecretKey,
  isKeyObject,
} = require('internal/crypto/keys');
 
async function hmacGenerateKey(algorithm, extractable, keyUsages) {
  const { hash, name } = algorithm;
  let { length } = algorithm;
  if (hash === undefined)
    throw new ERR_MISSING_OPTION('algorithm.hash');
 
  if (length === undefined)
    length = getHashLength(hash.name);
 
  validateBitLength(length, 'algorithm.length', true);
 
  const usageSet = new SafeSet(keyUsages);
  if (hasAnyNotIn(usageSet, ['sign', 'verify'])) {
    throw lazyDOMException(
      'Unsupported key usage for an HMAC key',
      'SyntaxError');
  }
  return new Promise((resolve, reject) => {
    generateKey('hmac', { length }, (err, key) => {
      if (err) {
        return reject(lazyDOMException(
          'The operation failed for an operation-specific reason',
          'OperationError'));
      }
 
      resolve(new InternalCryptoKey(
        key,
        { name, length, hash: { name: hash.name } },
        ArrayFrom(usageSet),
        extractable));
    });
  });
}
 
async function hmacImportKey(
  format,
  keyData,
  algorithm,
  extractable,
  keyUsages) {
  const { hash } = algorithm;
  if (hash === undefined)
    throw new ERR_MISSING_OPTION('algorithm.hash');
 
  const usagesSet = new SafeSet(keyUsages);
  if (hasAnyNotIn(usagesSet, ['sign', 'verify'])) {
    throw lazyDOMException(
      'Unsupported key usage for an HMAC key',
      'SyntaxError');
  }
  let keyObject;
  switch (format) {
    case 'node.keyObject': {
      if (!isKeyObject(keyData))
        throw new ERR_INVALID_ARG_TYPE('keyData', 'KeyObject', keyData);

      if (keyData.type !== 'secret') {
        throw lazyDOMException(
          `Unable to import HMAC key with format ${format}`);
      }

      keyObject = keyData;
      break;
    }
    case 'raw': {
      const checkLength = keyData.byteLength * 8;
 
      if (checkLength === 0 || algorithm.length === 0)
        throw lazyDOMException('Zero-length key is not supported', 'DataError');
 
      // The Web Crypto spec allows for key lengths that are not multiples of
      // 8. We don't. Our check here is stricter than that defined by the spec
      // in that we require that algorithm.length match keyData.length * 8 if
      // algorithm.length is specified.
      if (algorithm.length !== undefined &&
          algorithm.length !== checkLength) {
        throw lazyDOMException('Invalid key length', 'DataError');
      }
 
      keyObject = createSecretKey(keyData);
      break;
    }
    case 'jwk': {
      if (keyData == null || typeof keyData !== 'object')
        throw lazyDOMException('Invalid JWK keyData', 'DataError');
 
      if (keyData.kty !== 'oct')
        throw lazyDOMException('Invalid key type', 'DataError');
 
      if (usagesSet.size > 0 &&
          keyData.use !== undefined &&
          keyData.use !== 'sig') {
        throw lazyDOMException('Invalid use type', 'DataError');
      }
 
      validateKeyOps(keyData.key_ops, usagesSet);
 
      if (keyData.ext !== undefined &&
          keyData.ext === false &&
          extractable === true) {
        throw lazyDOMException('JWK is not extractable', 'DataError');
      }
 
      if (keyData.alg !== undefined) {
        if (typeof keyData.alg !== 'string')
          throw lazyDOMException('Invalid alg', 'DataError');
        switch (keyData.alg) {
          case 'HS1':
            if (algorithm.hash.name !== 'SHA-1')
              throw lazyDOMException('Digest algorithm mismatch', 'DataError');
            break;
          case 'HS256':
            if (algorithm.hash.name !== 'SHA-256')
              throw lazyDOMException('Digest algorithm mismatch', 'DataError');
            break;
          case 'HS384':
            if (algorithm.hash.name !== 'SHA-384')
              throw lazyDOMException('Digest algorithm mismatch', 'DataError');
            break;
          case 'HS512':
            if (algorithm.hash.name !== 'SHA-512')
              throw lazyDOMException('Digest algorithm mismatch', 'DataError');
            break;
          default:
            throw lazyDOMException('Unsupported digest algorithm', 'DataError');
        }
      }
 
      const handle = new KeyObjectHandle();
      handle.initJwk(keyData);
      keyObject = new SecretKeyObject(handle);
      break;
    }
    default:
      throw lazyDOMException(`Unable to import HMAC key with format ${format}`);
  }
 
  const { length } = keyObject[kHandle].keyDetail({});
 
  return new InternalCryptoKey(
    keyObject, {
      name: 'HMAC',
      hash: algorithm.hash,
      length,
    },
    keyUsages,
    extractable);
}
 
function hmacSignVerify(key, data, algorithm, signature) {
  const mode = signature === undefined ? kSignJobModeSign : kSignJobModeVerify;
  return jobPromise(new HmacJob(
    kCryptoJobAsync,
    mode,
    normalizeHashName(key.algorithm.hash.name),
    key[kKeyObject][kHandle],
    data,
    signature));
}
 
module.exports = {
  hmacImportKey,
  hmacGenerateKey,
  hmacSignVerify,
};