Utility methods for working with message digests.

class CryptoUtils {
  /**
   * Convert a list of bytes (for example a message digest) into a hex
   * string.
   */
  static String bytesToHex(List<int> bytes) {
    return _CryptoUtils.bytesToHex(bytes);
  }

  /**
   * Converts a list of bytes (for example a message digest) into a
   * base64 encoded string optionally broken up in to lines of
   * [lineLength] chars separated by '\r\n'.
   */
  static String bytesToBase64(List<int> bytes, [int lineLength]) {
    return _CryptoUtils.bytesToBase64(bytes, lineLength);
  }
}