code: function(recipientsArr) {
    var ret = [];
    for(var i = 0; i < recipientsArr.length; i ++) {
      ret.push(_recipientInfoToAsn1(recipientsArr[i]));
    }
    return ret;
  }
docs: Map an array of recipientInfo objects to ASN.1 objects.
  
  @param recipientsArr Array of recipientInfo objects.
  
  @return Array of ASN.1 representations RecipientInfo.