crypto-key-composer/es/formats/pkcs8/pkcs8-der.js

A library to decompose and compose crypto keys of different types and formats

import { decomposePrivateKeyInfo, composePrivateKeyInfo } from './keys';
import { maybeDecryptPrivateKeyInfo, maybeEncryptPrivateKeyInfo } from './encryption';
import { decodeAsn1, encodeAsn1 } from '../../util/asn1-encoder';
import { PrivateKeyInfo } from '../../util/asn1-entities';
import { DecodeAsn1FailedError } from '../../util/errors';
export const decomposePrivateKey = (encryptedPrivateKeyInfoAsn1, options) => {
  // Attempt to decrypt privateKeyInfoAsn1 as it might actually be a EncryptedPrivateKeyInfo
  const {
    privateKeyInfoAsn1,
    encryptionAlgorithm
  } = maybeDecryptPrivateKeyInfo(encryptedPrivateKeyInfoAsn1, options.password); // Attempt to decode as PrivateKeyInfo

  let privateKeyInfo;

  try {
    privateKeyInfo = decodeAsn1(privateKeyInfoAsn1, PrivateKeyInfo);
  } catch (err) {
    err.invalidInputKey = err instanceof DecodeAsn1FailedError;
    throw err;
  } // Decompose the PrivateKeyInfo


  const {
    keyAlgorithm,
    keyData
  } = decomposePrivateKeyInfo(privateKeyInfo);
  return {
    format: 'pkcs8-der',
    keyAlgorithm,
    keyData,
    encryptionAlgorithm
  };
};
export const composePrivateKey = ({
  keyAlgorithm,
  keyData,
  encryptionAlgorithm
}, options) => {
  // Generate the PrivateKeyInfo based on the key algorithm & key data
  const privateKeyInfo = composePrivateKeyInfo(keyAlgorithm, keyData); // Encode PrivateKeyInfo into ASN1

  const privateKeyInfoAsn1 = encodeAsn1(privateKeyInfo, PrivateKeyInfo); // Do we need to encrypt as EncryptedPrivateKeyInfo?

  const encryptedPrivateKeyInfoAsn1 = maybeEncryptPrivateKeyInfo(privateKeyInfoAsn1, encryptionAlgorithm, options.password);
  return encryptedPrivateKeyInfoAsn1;
};