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use std::fmt;
use std::io::Read;
use std::ops::Drop;
use std::ffi::CString;
use std::convert::From;
use std::mem::MaybeUninit;
use std::os::raw::{c_int, c_void};
use chrono::NaiveDateTime;
use crate::mapi::MAPIProperty;
use crate::utils::*;
#[derive(Copy, Clone, Debug, Eq, Ord, PartialEq, PartialOrd)]
pub enum TNEFError {
CannotInitData = -1,
NotTnefStream = -2,
ErrorReadingData = -3,
NoKey = -4,
BadChecksum = -5,
ErrorInHandler = -6,
UnknownProperty = -7,
IncorrectSetup = -8,
UnknownError = -9
}
impl From<i32> for TNEFError {
fn from(other: i32) -> Self {
match other {
-1 => TNEFError::CannotInitData,
-2 => TNEFError::NotTnefStream,
-3 => TNEFError::ErrorReadingData,
-4 => TNEFError::NoKey,
-5 => TNEFError::BadChecksum,
-6 => TNEFError::ErrorInHandler,
-7 => TNEFError::UnknownProperty,
-8 => TNEFError::IncorrectSetup,
_ => TNEFError::UnknownError
}
}
}
impl fmt::Display for TNEFError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let msg = match self {
TNEFError::CannotInitData => "Cannot initialize data",
TNEFError::NotTnefStream => "Not a TNEF stream",
TNEFError::ErrorReadingData => "Error reading data",
TNEFError::NoKey => "No key",
TNEFError::BadChecksum => "Bad checksum",
TNEFError::ErrorInHandler => "Error in I/O handler",
TNEFError::UnknownProperty => "Unkown property",
TNEFError::IncorrectSetup => "Incorrect setup",
_ => "Unkown error"
};
write!(f, "{} ({})", msg, *self as u8)
}
}
pub type TNEFResult<T> = Result<T, TNEFError>;
pub struct TNEFFile {
inner: ytnef_sys::TNEFStruct
}
struct ReaderWrapper {
inner: Box<dyn Read>
}
unsafe extern "C" fn tnef_io_open(_io: *mut ytnef_sys::_TNEFIOStruct) -> c_int {
0
}
unsafe extern "C" fn tnef_io_read(
io: *mut ytnef_sys::_TNEFIOStruct,
size: c_int,
count: c_int,
dest: *mut c_void
) -> c_int {
let mut reader = Box::from_raw((*io).data as *mut ReaderWrapper);
let buffer_size: usize = (size * count) as usize;
let mut buffer: Vec<u8> = vec![0; buffer_size];
let bytes_read: i32 = match reader.inner.read(&mut buffer) {
Ok(bytes_read) => bytes_read as i32,
Err(_) => -1
};
buffer.as_ptr().copy_to(dest as *mut u8, buffer_size);
(*io).data = Box::into_raw(reader) as *mut c_void;
bytes_read
}
unsafe extern "C" fn tnef_io_close(_io: *mut ytnef_sys::_TNEFIOStruct) -> c_int {
0
}
impl TNEFFile {
pub fn new<R: 'static + Read>(reader: R) -> TNEFResult<Self> {
let reader_wrapper = Box::new(ReaderWrapper {
inner: Box::new(reader)
});
let io = ytnef_sys::_TNEFIOStruct {
InitProc: Some(tnef_io_open),
ReadProc: Some(tnef_io_read),
CloseProc: Some(tnef_io_close),
data: Box::into_raw(reader_wrapper) as *mut c_void
};
let mut inner = MaybeUninit::<ytnef_sys::TNEFStruct>::zeroed();
let result: i32 = unsafe {
let mut inner_ptr = inner.as_mut_ptr();
ytnef_sys::TNEFInitialize(inner_ptr);
(*inner_ptr).IO = io;
(*inner_ptr).Debug = 0;
ytnef_sys::TNEFParse(inner_ptr)
};
if result < 0 {
Err(result.into())
} else {
Ok(Self { inner: unsafe { inner.assume_init() }})
}
}
pub fn from_file(path: String) -> TNEFResult<Self> {
let mut inner = MaybeUninit::<ytnef_sys::TNEFStruct>::zeroed();
let result: i32 = unsafe {
let path_cstr = match CString::new(path) {
Ok(path) => path.into_raw(),
Err(_) => {
return Err(TNEFError::CannotInitData);
}
};
let inner_ptr = inner.as_mut_ptr();
ytnef_sys::TNEFInitialize(inner_ptr);
let result = ytnef_sys::TNEFParseFile(path_cstr, inner_ptr);
let _ = CString::from_raw(path_cstr);
result
};
if result < 0 {
Err(result.into())
} else {
Ok(Self { inner: unsafe { inner.assume_init() } })
}
}
pub fn from_buffer(buffer: &mut [u8]) -> TNEFResult<Self> {
let mut inner = MaybeUninit::<ytnef_sys::TNEFStruct>::zeroed();
let result: i32 = unsafe {
let inner_ptr = inner.as_mut_ptr();
#[cfg(target_pointer_width = "32")]
let buffer_len = buffer.len() as i32;
#[cfg(target_pointer_width = "64")]
let buffer_len = buffer.len() as i64;
ytnef_sys::TNEFInitialize(inner_ptr);
ytnef_sys::TNEFParseMemory(
buffer.as_mut_ptr(),
buffer_len,
inner_ptr
)
};
if result < 0 {
Err(result.into())
} else {
Ok(Self { inner: unsafe { inner.assume_init() } })
}
}
pub fn version(&self) -> String {
make_safe_string(self.inner.version.as_ptr())
}
pub fn from(&self) -> Option<String> {
string_from_varlen(self.inner.from)
}
pub fn subject(&self) -> Option<String> {
string_from_varlen(self.inner.subject)
}
pub fn date_sent(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.dateSent)
}
pub fn date_received(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.dateReceived)
}
pub fn date_modified(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.dateModified)
}
pub fn date_start(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.DateStart)
}
pub fn date_end(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.DateEnd)
}
pub fn message_status(&self) -> String {
make_safe_string(self.inner.messageStatus.as_ptr())
}
pub fn message_class(&self) -> String {
make_safe_string(self.inner.messageClass.as_ptr())
}
pub fn message_id(&self) -> String {
make_safe_string(self.inner.messageID.as_ptr())
}
pub fn parent_id(&self) -> String {
make_safe_string(self.inner.parentID.as_ptr())
}
pub fn conversation_id(&self) -> String {
make_safe_string(self.inner.conversationID.as_ptr())
}
pub fn body(&self) -> Option<String> {
string_from_varlen(self.inner.body)
}
pub fn priority(&self) -> String {
make_safe_string(self.inner.priority.as_ptr())
}
pub fn attachments(&self) -> Vec<TNEFAttachment> {
let mut output: Vec<TNEFAttachment> = vec![];
let mut curr_attach = self.inner.starting_attach.next;
output.push(TNEFAttachment { inner: self.inner.starting_attach });
while !curr_attach.is_null() {
let attach = unsafe { TNEFAttachment::from_raw(curr_attach) };
curr_attach = attach.inner.next;
output.push(attach);
}
output
}
pub fn mapi_properties(&self) -> Vec<MAPIProperty> {
let mut output: Vec<MAPIProperty> = vec![];
let props_list = self.inner.MapiProperties;
for i in 0..props_list.count {
let property = unsafe {
MAPIProperty::from_raw(
props_list.properties.offset(i as isize)
)
};
output.push(property);
}
output
}
pub fn code_page(&self) -> Option<Vec<u8>> {
vec_from_varlen(self.inner.CodePage)
}
pub fn original_message_class(&self) -> Option<String> {
string_from_varlen(self.inner.OriginalMessageClass)
}
pub fn owner(&self) -> Option<String> {
string_from_varlen(self.inner.Owner)
}
pub fn sent_for(&self) -> Option<String> {
string_from_varlen(self.inner.SentFor)
}
pub fn delegate(&self) -> Option<String> {
string_from_varlen(self.inner.Delegate)
}
pub fn aid_owner(&self) -> Option<String> {
string_from_varlen(self.inner.AidOwner)
}
}
impl Drop for TNEFFile {
fn drop(&mut self) {
unsafe { ytnef_sys::TNEFFree(&mut self.inner); }
}
}
pub struct TNEFAttachmentRenderData {
pub attach_type: u16,
pub position: u32,
pub width: u16,
pub height: u16,
pub flags: u32
}
pub struct TNEFAttachment {
inner: ytnef_sys::Attachment
}
impl Default for TNEFAttachment {
fn default() -> Self {
Self::new()
}
}
impl TNEFAttachment {
pub fn new() -> Self {
unsafe {
let mut inner = MaybeUninit::<ytnef_sys::Attachment>::zeroed();
ytnef_sys::TNEFInitAttachment(inner.as_mut_ptr());
Self { inner: inner.assume_init() }
}
}
pub unsafe fn from_raw(raw: *mut ytnef_sys::Attachment) -> Self {
Self { inner: raw.read() }
}
pub fn date(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.Date)
}
pub fn title(&self) -> Option<String> {
string_from_varlen(self.inner.Title)
}
pub fn create_date(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.CreateDate)
}
pub fn modify_date(&self) -> NaiveDateTime {
datetime_from_dtr(self.inner.ModifyDate)
}
pub fn transport_filename(&self) -> Option<String> {
string_from_varlen(self.inner.TransportFilename)
}
pub fn render_data(&self) -> TNEFAttachmentRenderData {
TNEFAttachmentRenderData {
attach_type: self.inner.RenderData.atyp,
position: self.inner.RenderData.ulPosition,
width: self.inner.RenderData.dxWidth,
height: self.inner.RenderData.dyHeight,
flags: self.inner.RenderData.dwFlags
}
}
pub fn file_data(&self) -> Option<Vec<u8>> {
vec_from_varlen(self.inner.FileData)
}
pub fn icon_data(&self) -> Option<Vec<u8>> {
vec_from_varlen(self.inner.IconData)
}
}
#[cfg(test)]
mod test {
use super::*;
use std::fs::{read, File};
#[test]
fn new_from_file() {
let file = File::open("test_data/winmail.dat").unwrap();
let _ = TNEFFile::new(file).unwrap();
}
#[test]
fn new_from_path() {
let _ = TNEFFile::from_file("test_data/winmail.dat".to_string()).unwrap();
}
#[test]
fn new_from_buffer() {
let mut buffer: Vec<u8> = read("test_data/winmail.dat").unwrap();
let _ = TNEFFile::from_buffer(&mut buffer).unwrap();
}
}