Function rsaFunctionFor

lib/internal/crypto/cipher.js:65–83

(method, defaultPadding, keyType)

const { StringDecoder } = require('string_decoder');

function rsaFunctionFor(method, defaultPadding, keyType) {
  const keyName = keyType === 'private' ? 'privateKey' : undefined;
  return (key, buffer) => {
    const { format, type, data, passphrase, namedCurve } =
      keyType === 'private' ?
        preparePrivateKey(key, keyName) :
        preparePublicOrPrivateKey(key, keyName);
    const padding = key.padding || defaultPadding;
    const { oaepHash, encoding } = key;
    let { oaepLabel } = key;
    if (oaepHash !== undefined)
      validateString(oaepHash, 'key.oaepHash');
    if (oaepLabel !== undefined)
      oaepLabel = getArrayBufferOrView(oaepLabel, 'key.oaepLabel', encoding);
    buffer = getArrayBufferOrView(buffer, 'buffer', encoding);
    return method(data, format, type, passphrase, namedCurve, buffer,
                  padding, oaepHash, oaepLabel);
  };
}

const publicEncrypt = rsaFunctionFor(_publicEncrypt, RSA_PKCS1_OAEP_PADDING,
                                     'public');