Expose cookie generate/verify callback setters (e04dbfa3) · Commits · Public Repositories / Rust Openssl

openssl/src/ssl/callbacks.rs

+50 −0

Original line number	Diff line number	Diff line
		@@ -361,3 +361,53 @@ where

		callback(ssl, line);
		}

		pub extern "C" fn raw_cookie_generate<F>(
		ssl: *mut ffi::SSL,
		cookie: *mut c_uchar,
		cookie_len: *mut c_uint
		) -> c_int
		where
		F: Fn(&mut SslRef, &mut [u8]) -> Result<usize, ErrorStack> + 'static + Sync + Send
		{
		unsafe {
		let ssl_ctx = ffi::SSL_get_SSL_CTX(ssl as *const _);
		let callback = ffi::SSL_CTX_get_ex_data(ssl_ctx, get_callback_idx::<F>());
		let ssl = SslRef::from_ptr_mut(ssl);
		let callback = &(callback as mut F);
		// We subtract 1 from DTLS1_COOKIE_LENGTH as the ostensible value, 256, is erroneous but retained for
		// compatibility. See comments in dtls1.h.
		let slice = slice::from_raw_parts_mut(cookie as *mut u8, ffi::DTLS1_COOKIE_LENGTH as usize - 1);
		match callback(ssl, slice) {
		Ok(len) => {
		*cookie_len = len as c_uint;
		1
		}
		Err(_) => 0,
		}
		}
		}

		#[cfg(ossl110)]
		type CookiePtr = *const c_uchar;

		#[cfg(not(ossl110))]
		type CookiePtr = *mut c_uchar;

		pub extern "C" fn raw_cookie_verify<F>(
		ssl: *mut ffi::SSL,
		cookie: CookiePtr,
		cookie_len: c_uint
		) -> c_int
		where
		F: Fn(&mut SslRef, &[u8]) -> bool + 'static + Sync + Send
		{
		unsafe {
		let ssl_ctx = ffi::SSL_get_SSL_CTX(ssl as *const _);
		let callback = ffi::SSL_CTX_get_ex_data(ssl_ctx, get_callback_idx::<F>());
		let ssl = SslRef::from_ptr_mut(ssl);
		let callback = &(callback as mut F);
		let slice = slice::from_raw_parts(cookie as const c_uchar as const u8, cookie_len as usize);
		callback(ssl, slice) as c_int
		}
		}

openssl/src/ssl/mod.rs

+45 −0

Original line number	Diff line number	Diff line
		@@ -1311,6 +1311,51 @@ impl SslContextBuilder {
		}
		}

		/// Sets the callback for generating an application cookie for stateless handshakes.
		///
		/// The callback will be called with the SSL context and a slice into which the cookie
		/// should be written. The callback should return the number of bytes written.
		///
		/// This corresponds to `SSL_CTX_set_cookie_generate_cb`.
		pub fn set_cookie_generate_cb<F>(&mut self, callback: F)
		where
		F: Fn(&mut SslRef, &mut [u8]) -> Result<usize, ErrorStack> + 'static + Sync + Send
		{
		unsafe {
		let callback = Box::new(callback);
		ffi::SSL_CTX_set_ex_data(
		self.as_ptr(),
		get_callback_idx::<F>(),
		mem::transmute(callback),
		);
		ffi::SSL_CTX_set_cookie_generate_cb(self.as_ptr(), Some(raw_cookie_generate::<F>))
		}
		}

		/// Sets the callback for verifying an application cookie for stateless handshakes.
		///
		/// The callback will be called with the SSL context and the cookie supplied by the
		/// client. It should return true if and only if the cookie is valid.
		///
		/// Note that the OpenSSL implementation independently verifies the integrity of
		/// application cookies using an HMAC before invoking the supplied callback.
		///
		/// This corresponds to `SSL_CTX_set_cookie_verify_cb`.
		pub fn set_cookie_verify_cb<F>(&mut self, callback: F)
		where
		F: Fn(&mut SslRef, &[u8]) -> bool + 'static + Sync + Send
		{
		unsafe {
		let callback = Box::new(callback);
		ffi::SSL_CTX_set_ex_data(
		self.as_ptr(),
		get_callback_idx::<F>(),
		mem::transmute(callback),
		);
		ffi::SSL_CTX_set_cookie_verify_cb(self.as_ptr(), Some(raw_cookie_verify::<F>))
		}
		}

		/// Sets the extra data at the specified index.
		///
		/// This can be used to provide data to callbacks registered with the context. Use the

Admin message