engine/tls: basic start and replace sslio
* I believe working around `br_sslio_*` isn't worth the effort as the same functionality can be done manually with `*_buf` + `*_ack` which is used by sslio internally. This will especially be useful when wrapping Write/Read traits in std. * Since both server and client contextes use `br_ssl_engine_context`, writing the routines for it removes a lot of future headaches. The engines shouldn't be used directly but will be exposed anyway for special cases and for having more discoverable errors.main
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|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "zeroize"
|
||||
version = "1.5.7"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c394b5bd0c6f669e7275d9c20aa90ae064cb22e75a1cad54e1b34088034b149f"
|
||||
|
|
@ -2,11 +2,10 @@
|
|||
|
||||
Here we list the how other projects were utilized and their licenses.
|
||||
|
||||
|
||||
## Rustls
|
||||
|
||||
* API Design for connections
|
||||
- `read_tls` and `write_tls` is utilized except we use byte slices due to being `no_std`.
|
||||
- `read_tls` and `write_tls` API design is copied pretty much as-is.
|
||||
|
||||
```
|
||||
ISC License (ISC)
|
||||
|
|
|
|||
|
|
@ -0,0 +1 @@
|
|||
pub mod tls;
|
||||
|
|
@ -0,0 +1,140 @@
|
|||
use core::cmp::min;
|
||||
use core::mem::MaybeUninit;
|
||||
use core::slice;
|
||||
|
||||
use bearssl_sys::*;
|
||||
|
||||
pub enum Error {
|
||||
/// A session resumption has been attempted with a distinct version or cipher suite.
|
||||
SessionResumptionMismatch,
|
||||
|
||||
/// Other side has sent an invalid signature.
|
||||
BadSignature,
|
||||
|
||||
/// The error code is unknown or not wrapped around yet.
|
||||
Unknown,
|
||||
}
|
||||
|
||||
/// TLS engine used by both server and client connections.
|
||||
#[repr(transparent)]
|
||||
pub struct TlsEngine {
|
||||
pub(crate) context: br_ssl_engine_context,
|
||||
}
|
||||
|
||||
impl TlsEngine {
|
||||
/// Push some plaintext bytes into engine.
|
||||
pub fn push_write(&mut self, src: &[u8]) -> Result<usize, Error> {
|
||||
let buf = unsafe {
|
||||
let mut l = MaybeUninit::<usize>::uninit();
|
||||
|
||||
let b = br_ssl_engine_sendapp_buf(&self.context, l.as_mut_ptr());
|
||||
|
||||
if b.is_null() {
|
||||
return Err(Error::Unknown);
|
||||
}
|
||||
|
||||
slice::from_raw_parts_mut(b, l.assume_init_read())
|
||||
};
|
||||
|
||||
let len = match min(buf.len(), src.len()) {
|
||||
0 => return Err(Error::Unknown),
|
||||
l => l,
|
||||
};
|
||||
|
||||
buf[..len].copy_from_slice(&src[..len]);
|
||||
|
||||
unsafe {
|
||||
br_ssl_engine_sendapp_ack(&mut self.context, len);
|
||||
}
|
||||
|
||||
Ok(len)
|
||||
}
|
||||
|
||||
/// Get the TLS record that has wrapped the pushed data. Returns an error or how many bytes of TLS record were written to `dst`.
|
||||
pub fn pull_write(&mut self, dst: &mut [u8]) -> Result<usize, Error> {
|
||||
let buf = unsafe {
|
||||
let mut l = MaybeUninit::<usize>::uninit();
|
||||
|
||||
let b = br_ssl_engine_sendrec_buf(&mut self.context, l.as_mut_ptr());
|
||||
|
||||
if b.is_null() {
|
||||
return Err(Error::Unknown);
|
||||
}
|
||||
|
||||
slice::from_raw_parts(b, l.assume_init_read())
|
||||
};
|
||||
|
||||
let len = match min(buf.len(), dst.len()) {
|
||||
0 => return Err(Error::Unknown),
|
||||
l => l,
|
||||
};
|
||||
|
||||
dst[..len].copy_from_slice(&buf[..len]);
|
||||
|
||||
unsafe {
|
||||
br_ssl_engine_sendrec_ack(&mut self.context, len);
|
||||
}
|
||||
|
||||
Ok(len)
|
||||
}
|
||||
|
||||
/// Push incoming TLS record to be decrypted.
|
||||
pub fn push_read(&mut self, src: &[u8]) -> Result<usize, Error> {
|
||||
let buf = unsafe {
|
||||
let mut l = MaybeUninit::<usize>::uninit();
|
||||
|
||||
let b = br_ssl_engine_recvrec_buf(&mut self.context, l.as_mut_ptr());
|
||||
|
||||
if b.is_null() {
|
||||
return Err(Error::Unknown);
|
||||
}
|
||||
|
||||
slice::from_raw_parts_mut(b, l.assume_init_read())
|
||||
};
|
||||
|
||||
let len = match min(buf.len(), src.len()) {
|
||||
0 => return Err(Error::Unknown),
|
||||
l => l,
|
||||
};
|
||||
|
||||
buf[..len].copy_from_slice(&src[..len]);
|
||||
|
||||
unsafe {
|
||||
br_ssl_engine_recvrec_ack(&mut self.context, len);
|
||||
}
|
||||
|
||||
Ok(len)
|
||||
}
|
||||
|
||||
/// Get the application data pushed before.
|
||||
pub fn pull_read(&mut self, dst: &mut [u8]) -> Result<usize, Error> {
|
||||
let buf = unsafe {
|
||||
let mut l = MaybeUninit::<usize>::uninit();
|
||||
|
||||
let b = br_ssl_engine_recvapp_buf(&mut self.context, l.as_mut_ptr());
|
||||
|
||||
if b.is_null() {
|
||||
return Err(Error::Unknown);
|
||||
}
|
||||
|
||||
slice::from_raw_parts(b, l.assume_init_read())
|
||||
};
|
||||
|
||||
let len = match min(buf.len(), dst.len()) {
|
||||
0 => return Err(Error::Unknown),
|
||||
l => l,
|
||||
};
|
||||
|
||||
dst[..len].copy_from_slice(&buf[..len]);
|
||||
|
||||
unsafe {
|
||||
br_ssl_engine_recvapp_ack(&mut self.context, len);
|
||||
}
|
||||
|
||||
Ok(len)
|
||||
}
|
||||
|
||||
pub fn shutdown_recieved(&self) -> bool {
|
||||
self.context.shutdown_recv != 0
|
||||
}
|
||||
}
|
||||
|
|
@ -1,25 +0,0 @@
|
|||
use core::ffi::c_void;
|
||||
|
||||
use bearssl_sys::*;
|
||||
use libc::{c_int, c_uchar};
|
||||
|
||||
pub trait HazardReadCallback {
|
||||
/// Callback made by the SSL I/O context.
|
||||
extern "C" fn read(ctx: *mut c_void, data: *mut c_uchar, len: usize) -> c_int;
|
||||
|
||||
/// Get the context to be used in the callback.
|
||||
unsafe fn get_context(&self) -> *mut c_void;
|
||||
}
|
||||
|
||||
pub trait HazardWriteCallback {
|
||||
/// Callback made by the SSL I/O context.
|
||||
extern "C" fn write(ctx: *mut c_void, data: *const c_uchar, len: usize) -> c_int;
|
||||
|
||||
/// Get the context to be used in the callback.
|
||||
unsafe fn get_context(&self) -> *mut c_void;
|
||||
}
|
||||
|
||||
#[repr(transparent)]
|
||||
pub struct TlsIo {
|
||||
context: br_sslio_context,
|
||||
}
|
||||
|
|
@ -3,7 +3,7 @@
|
|||
#[cfg(feature = "std")]
|
||||
extern crate std;
|
||||
|
||||
pub mod io;
|
||||
pub mod engine;
|
||||
pub mod profile;
|
||||
pub mod rsa;
|
||||
pub mod server;
|
||||
|
|
|
|||
|
|
@ -1,7 +1,9 @@
|
|||
use core::marker::PhantomData;
|
||||
use core::mem::transmute;
|
||||
|
||||
use bearssl_sys::*;
|
||||
|
||||
use crate::engine::tls;
|
||||
use crate::x509::cert::X509Certificate;
|
||||
|
||||
/// Represents a connected client.
|
||||
|
|
@ -12,5 +14,27 @@ pub struct ServerConnection<'a> {
|
|||
}
|
||||
|
||||
impl<'a> ServerConnection<'a> {
|
||||
pub fn push_bytes(&self, data: &[u8]) {}
|
||||
pub fn push_write(&mut self, src: &[u8]) -> Result<usize, tls::Error> {
|
||||
let engine: &mut tls::TlsEngine = unsafe { transmute(&mut self.context.eng) };
|
||||
|
||||
engine.push_write(src)
|
||||
}
|
||||
|
||||
pub fn pull_write(&mut self, dst: &mut [u8]) -> Result<usize, tls::Error> {
|
||||
let engine: &mut tls::TlsEngine = unsafe { transmute(&mut self.context.eng) };
|
||||
|
||||
engine.pull_write(dst)
|
||||
}
|
||||
|
||||
pub fn push_read(&mut self, src: &[u8]) -> Result<usize, tls::Error> {
|
||||
let engine: &mut tls::TlsEngine = unsafe { transmute(&mut self.context.eng) };
|
||||
|
||||
engine.push_read(src)
|
||||
}
|
||||
|
||||
pub fn pull_read(&mut self, dst: &mut [u8]) -> Result<usize, tls::Error> {
|
||||
let engine: &mut tls::TlsEngine = unsafe { transmute(&mut self.context.eng) };
|
||||
|
||||
engine.pull_read(dst)
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue