Function toCryptoKey

lib/internal/crypto/keys.js:764–824

* Converts an asymmetric KeyObjectHandle to a CryptoKey by dispatching to * the algorithm-specific Web Crypto import path. This preserves the same * algorithm and usage validation used by SubtleCrypto.importKey(). * @param {KeyObjectHandle} keyData * @param {object} algorithm * @param {boolean}

(
  keyData,
  algorithm,
  extractable,
  keyUsages,
)

 * @returns {CryptoKey}
 */
function toCryptoKey(
  keyData,
  algorithm,
  extractable,
  keyUsages,
) {
  let result;
  switch (algorithm.name) {
    case 'RSASSA-PKCS1-v1_5':
      // Fall through
    case 'RSA-PSS':
      // Fall through
    case 'RSA-OAEP':
      result = require('internal/crypto/rsa')
        .rsaImportKey('KeyObjectHandle', keyData, algorithm, extractable, keyUsages);
      break;
    case 'ECDSA':
      // Fall through
    case 'ECDH':
      result = require('internal/crypto/ec')
        .ecImportKey('KeyObjectHandle', keyData, algorithm, extractable, keyUsages);
      break;
    case 'Ed25519':
      // Fall through
    case 'Ed448':
      // Fall through
    case 'X25519':
      // Fall through
    case 'X448':
      result = require('internal/crypto/cfrg')
        .cfrgImportKey('KeyObjectHandle', keyData, algorithm, extractable, keyUsages);
      break;
    case 'ML-DSA-44':
      // Fall through
    case 'ML-DSA-65':
      // Fall through
    case 'ML-DSA-87':
      result = require('internal/crypto/ml_dsa')
        .mlDsaImportKey('KeyObjectHandle', keyData, algorithm, extractable, keyUsages);
      break;
    case 'ML-KEM-512':
      // Fall through
    case 'ML-KEM-768':
      // Fall through
    case 'ML-KEM-1024':
      result = require('internal/crypto/ml_kem')
        .mlKemImportKey('KeyObjectHandle', keyData, algorithm, extractable, keyUsages);
      break;
    default:
      throw lazyDOMException('Unrecognized algorithm name', 'NotSupportedError');
  }

  const resultType = getCryptoKeyType(result);
  if (resultType === 'private' && getCryptoKeyUsagesMask(result) === 0) {
    throw lazyDOMException(
      `Usages cannot be empty when importing a ${resultType} key.`,
      'SyntaxError');
  }