For some reaosn, any difference between exact bytes written and read (even if they are identical, just spread over different `write` calls) causes the reading half to produce garbage?

For ESock to work, a `write(n)` needs to be paired with a `read(n)` for identical sizes of `n`. Not using `write_all(n)`+`read_exact(n)` causes this disjoint too? (Test with `write_all(n)`+`while read(...)` produced garbage.)

I have no idea what is going on here. I think there"s some disconnect with the cipher, but it"s a stream cipher, so positioning (i.e. where byte pattern `A` appears in slice `B` on the writing side, and slice `C` on the reading size) shouldn"t matter right? Clearly it seems to.

This is extremely disappointing.

Fortune for rsh's current commit: Future small blessing − 末小吉

src/sock/enc.rs

@@ -461,7 +461,8 @@ impl<W: AsyncWrite+ Unpin, R: AsyncRead + Unpin> ESock<W, R>
     }
 }
 
-//XXXXXXX: This isn't working. The first write to the socket succeeds. Any subsequent writes/reads produce garbage. Why?
+//XXX: For some reason, non-exact reads + writes cause garbage to be produced on the receiving end?
+//     Is this fixable? Why does it disjoint? I have no idea... This is supposed to be a stream cipher, right? Why does positioning matter? Have I misunderstood how it workd? Eh... 
 
 impl<W, R> AsyncWrite for ESock<W, R>
 where W: AsyncWrite
@@ -717,7 +718,7 @@ mod tests
 
 	// The duplex buffer size here is smaller than an RSA ciphertext block. So, writing the session key must be buffered with a buffer size this small (should return Pending at least once.)
 	// Using a low buffer size to make sure the test passes even when the entire buffer cannot be written at once.
-	let (mut tx, mut rx) = gen_duplex_esock(256).wrap_err(eyre!("Failed to weave socks"))?;
+	let (mut tx, mut rx) = gen_duplex_esock(16).wrap_err(eyre!("Failed to weave socks"))?;
 	
 	let writer = tokio::spawn(async move {
 	    use tokio::prelude::*;
@@ -728,9 +729,8 @@ mod tests
 	    tx.set_encrypted_write(true).await?;
 	    assert_eq!((true, false), tx.is_encrypted());
 
-	    tx.write_all(&VALUE[0..2]).await?;
-	    tx.write_all(&VALUE[2..6]).await?;
-	    tx.write_all(&VALUE[6..]).await?;
+	    tx.write_all(VALUE).await?;
+	    tx.write_all(VALUE).await?;
 
 	    // Check resp
 	    tx.set_encrypted_read(true).await?;
@@ -758,6 +758,11 @@ mod tests
 	    let mut val = vec![0u8; VALUE.len()];
 	    rx.read_exact(&mut val[..]).await?;
 	    
+	    let mut val2 = vec![0u8; VALUE.len()];
+	    rx.read_exact(&mut val2[..]).await?;
+
+	    assert_eq!(val, val2);
+
 	    // Send resp
 	    rx.set_encrypted_write(true).await?;
 	    rx.write_all(&[0xaa, 0, 0]).await?;