65 changed files with 303 additions and 1299 deletions
--- a/.gitignore
+++ b/.gitignore
@ -15,7 +15,6 @@
 .ccls-cache/
 /python/.eggs
 /python/install-temp
-/result

 # Xcode
 build/
@ -37,7 +36,4 @@ xcuserdata/
 *.dSYM.zip
 *.dSYM
 Pods/
-*.xcworkspace
-
-# JetBrains tools
-.idea/
+*.xcworkspace
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@ -1,67 +1,3 @@
-Changes in `3.2.16 <https://gitlab.matrix.org/matrix-org/olm/tags/3.2.16>`_
-===========================================================================
-
-This release includes the following changes since 3.2.15:
-
-* Fix and modernize the Python packaging (thanks to Alfred Wingate)
-
-Changes in `3.2.15 <https://gitlab.matrix.org/matrix-org/olm/tags/3.2.15>`_
-===========================================================================
-
-This release includes the following changes since 3.2.14:
-
-* Improvements to Python packaging
-  * No longer depend on ``future`` since Python 2 is no longer supported.
-  * Improve compatibility with tox 4.
-  * Add support for making standalone sdist.
-* Improvements to Nix flake (Thanks to Jon Ringer)
-  * Improve structure.
-  * Enable Darwin builds.
-* Typescript type fix.
-
-Changes in `3.2.14 <https://gitlab.matrix.org/matrix-org/olm/tags/3.2.14>`_
-===========================================================================
-
-This release includes the following changes since 3.2.13:
-
-* TypeScript type improvements.
-* Improvements to Python packaging
-* Documentation improvements.
-
-Changes in `3.2.13 <https://gitlab.matrix.org/matrix-org/olm/tags/3.2.13>`_
-===========================================================================
-
-This release includes the following changes since 3.2.12:
-
-* Fix compilation with newer versions of emscripten.
-  * The npm package is compiled with emscripten 3.1.17 to fix compatibility with
-    node 18.
-* Add py.typed to Python wheels.
-* Some documentation fixes and updates.
-* Improve the pkgconfig file.
-
-Changes in `3.2.12 <https://gitlab.matrix.org/matrix-org/olm/tags/3.2.12>`_
-===========================================================================
-
-This release includes the following changes since 3.2.11:
-
-* Expose olm_sas_calculate_mac_fixed_base64 in the bindings.
-* Allow memory to grow in wasm.  Thanks to benkuly for the suggestion.
-* Fix Python type hints.
-* Some Python build fixes.
-* Initial work on a Nix flake for building and testing.
-
-Changes in `3.2.11 <https://gitlab.matrix.org/matrix-org/olm/tags/3.2.11>`_
-===========================================================================
-
-This release includes the following changes since 3.2.10:
-
-* Fix building documentation.  Thanks to Jonas Smedegaard.  The documents
-  written in Markdown are now converted to HTML using Pandoc.
-* Add methods for getting unpublished fallback key in Objective-C binding.
-* Add public pickle/unpickle methods to Java binding.
-* Add wrapper for olm_session_describe to Java binding.  Thanks to Alex Baker.
-
 Changes in `3.2.10 <https://gitlab.matrix.org/matrix-org/olm/tags/3.2.10>`_
 ===========================================================================

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.4)

-project(olm VERSION 3.2.16 LANGUAGES CXX C)
+project(olm VERSION 3.2.10 LANGUAGES CXX C)

 option(OLM_TESTS "Build tests" ON)
 option(BUILD_SHARED_LIBS "Build as a shared library" ON)
--- a/9
+++ b/9
@ -5,9 +5,10 @@ VERSION := $(MAJOR).$(MINOR).$(PATCH)
 PREFIX ?= /usr/local
 BUILD_DIR := build
 RELEASE_OPTIMIZE_FLAGS ?= -O3
-DEBUG_OPTIMIZE_FLAGS ?= -g -O0 -U_FORTIFY_SOURCE
+DEBUG_OPTIMIZE_FLAGS ?= -g -O0
 JS_OPTIMIZE_FLAGS ?= -O3
 FUZZER_OPTIMIZE_FLAGS ?= -O3
+CC = gcc
 EMCC = emcc
 EMAR = emar
 AR = ar
@ -30,7 +31,7 @@ JS_ASMJS_TARGET := javascript/olm_legacy.js
 WASM_TARGET := $(BUILD_DIR)/wasm/libolm.a

 JS_EXPORTED_FUNCTIONS := javascript/exported_functions.json
-JS_EXPORTED_RUNTIME_METHODS := [ALLOC_STACK,writeAsciiToMemory,intArrayFromString,UTF8ToString,stringToUTF8]
+JS_EXPORTED_RUNTIME_METHODS := [ALLOC_STACK]
 JS_EXTERNS := javascript/externs.js

 PUBLIC_HEADERS := include/olm/olm.h include/olm/outbound_group_session.h include/olm/inbound_group_session.h include/olm/pk.h include/olm/sas.h include/olm/error.h include/olm/olm_export.h
@ -93,7 +94,7 @@ LDFLAGS += -Wall -Werror
 CFLAGS_NATIVE = -fPIC
 CXXFLAGS_NATIVE = -fPIC

-EMCCFLAGS = --closure 1 --memory-init-file 0 -s NO_FILESYSTEM=1 -s INVOKE_RUN=0 -s MODULARIZE=1 -Wno-error=closure
+EMCCFLAGS = --closure 1 --memory-init-file 0 -s NO_FILESYSTEM=1 -s INVOKE_RUN=0 -s MODULARIZE=1

 # Olm generally doesn't need a lot of memory to encrypt / decrypt its usual
 # payloads (ie. Matrix messages), but we do need about 128K of heap to encrypt
@ -103,7 +104,7 @@ EMCCFLAGS = --closure 1 --memory-init-file 0 -s NO_FILESYSTEM=1 -s INVOKE_RUN=0
 # (This can't be changed by the app with wasm since it's baked into the wasm).
 # (emscripten also mandates at least 16MB of memory for asm.js now, so
 # we don't use this for the legacy build.)
-EMCCFLAGS_WASM += -s TOTAL_STACK=65536 -s TOTAL_MEMORY=262144 -s ALLOW_MEMORY_GROWTH
+EMCCFLAGS_WASM += -s TOTAL_STACK=65536 -s TOTAL_MEMORY=262144

 EMCCFLAGS_ASMJS += -s WASM=0

--- a/OLMKit.podspec
+++ b/OLMKit.podspec
@ -3,7 +3,7 @@ Pod::Spec.new do |s|
  # The libolm version
  MAJOR = 3
  MINOR = 2
-  PATCH = 16
+  PATCH = 10

  s.name         = "OLMKit"
  s.version      = "#{MAJOR}.#{MINOR}.#{PATCH}"
--- a/Package.swift
+++ b/Package.swift
@ -2,7 +2,7 @@

 import PackageDescription

-let major = 3, minor = 2, patch = 16
+let major = 3, minor = 2, patch = 10

 let package = Package(
    name: "Olm",
--- a/README.md
+++ b/README.md
@ -9,69 +9,6 @@ The specification of the Olm ratchet can be found in [docs/olm.md](docs/olm.md).
 This library also includes an implementation of the Megolm cryptographic
 ratchet, as specified in [docs/megolm.md](docs/megolm.md).

-## Installing
-
-### Linux and other Unix-like systems
-
-Your distribution may have pre-compiled packages available.  If not, or if you
-need a newer version, you will need to compile from source.  See the "Building"
-section below for more details.
-
-### macOS
-
-The easiest way to install on macOS is via Homebrew.  If you do not have
-Homebrew installed, follow the instructions at https://brew.sh/ to install it.
-
-You can then install libolm by running
-
-```bash
-brew install libolm
-```
-
-If you also need the Python packages, you can run
-
-```bash
-pip3 install python-olm --global-option="build_ext" --global-option="--include-dirs="`brew --prefix libolm`"/include" --global-option="--library-dirs="`brew --prefix libolm`"/lib"
-```
-
-Note that this will install an older version of the Python bindings, which may
-be missing some functions.  If you need the latest version, you will need to
-build from source.
-
-### Windows
-
-You will need to build from source.  See the "Building" section below for more
-details.
-
-### Bindings
-
-#### JavaScript
-
-You can use pre-built npm packages, available at
-<https://gitlab.matrix.org/matrix-org/olm/-/packages?type=npm>.
-
-#### Python
-
-A Python source package and pre-built packages for certain architectures from
-<https://pypi.org/project/python-olm/>.  If a pre-built package is not
-available for your architecture, you will need:
-
- cmake (recommended) or GNU make
- a C/C++ compiler
-
-to build the source package.
-
-You can then run `pip install python-olm`.
-
-Currently, we try to provide packages for all supported versions of Python on
-x86-64, i686, and aarch64, but we cannot guarantee that packages for all
-versions will be available on all architectures.
-
-#### Android
-
-Pre-built Android bindings are available at
-<https://gitlab.matrix.org/matrix-org/olm/-/packages?type=Maven>.
-
 ## Building

 To build olm as a shared library run:
@ -104,38 +41,22 @@ target_link_libraries(my_exe Olm::Olm)

 ### Bindings

-#### JavaScript
-
-The recommended way to build the JavaScript bindings is using
-[Nix](https://nixos.org/).  With Nix, you can run
-
-```bash
-nix build .\#javascript
-```
-
-to build the bindings.
-
-If you do not have Nix you can, install emscripten from https://emscripten.org/
-and then run:
+To build the JavaScript bindings, install emscripten from https://emscripten.org/ and then run:

 ```bash
 make js
 ```

-Emscripten can also be run via Docker, in which case, you need to pass through
+Note that if you run emscripten in a docker container, you need to pass through
 the EMCC_CLOSURE_ARGS environment variable.

-#### Android
-
 To build the android project for Android bindings, run:

 ```bash
 cd android
-./gradlew clean build
+./gradlew clean assembleRelease
 ```

-#### Objective-C
-
 To build the Xcode workspace for Objective-C bindings, run:

 ```bash
@ -144,9 +65,7 @@ pod install
 open OLMKit.xcworkspace
 ```

-#### Python
-
-To build the Python 3 bindings, first build olm as a library as above, and
+To build the Python bindings, first build olm as a shared library as above, and
 then run:

 ```bash
@ -154,6 +73,9 @@ cd python
 make
 ```

+to make both the Python 2 and Python 3 bindings.  To make only one version, use
+``make olm-python2`` or ``make olm-python3`` instead of just ``make``.
+
 ### Using make instead of cmake

 **WARNING:** Using cmake is the preferred method for building the olm library;
@ -197,7 +119,7 @@ repository, some bindings are (in alphabetical order):
 - [nim-olm](https://codeberg.org/BarrOff/nim-olm) (MIT) Nim bindings
 - [olm-sys](https://gitlab.gnome.org/BrainBlasted/olm-sys) (Apache-2.0) Rust
  bindings
- [Trixnity](https://gitlab.com/trixnity/trixnity) (Apache-2.0) Kotlin SDK for
+- [Trixnity](https://gitlab.com/benkuly/trixnity) (AGPLv3) Kotlin SDK for
  Matrix, including Olm bindings

 Note that bindings may have a different license from libolm, and are *not*
@ -206,7 +128,7 @@ endorsed by the Matrix.org Foundation C.I.C.
 ## Release process

 First: bump version numbers in ``common.mk``, ``CMakeLists.txt``,
-``javascript/package.json``, ``python/pyproject.toml``, ``OLMKit.podspec``,
+``javascript/package.json``, ``python/olm/__version__.py``, ``OLMKit.podspec``,
 ``Package.swift``, and ``android/gradle.properties``.

 Also, ensure the changelog is up to date, and that everything is committed to
--- a/Windows64.cmake
+++ b/Windows64.cmake
@ -11,8 +11,8 @@
 SET(CMAKE_SYSTEM_NAME Windows)

 # which compilers to use for C and C++
-SET(CMAKE_C_COMPILER x86_64-w64-mingw32-gcc-posix)
-SET(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++-posix)
+SET(CMAKE_C_COMPILER x86_64-w64-mingw32-gcc)
+SET(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++)
 SET(CMAKE_RC_COMPILER x86_64-w64-mingw32-windres)

 # here is the target environment located
--- a/android/gradle.properties
+++ b/android/gradle.properties
@ -26,7 +26,7 @@ org.gradle.configureondemand=false
 # Ref: https://github.com/vanniktech/gradle-maven-publish-plugin
 GROUP=org.matrix.android
 POM_ARTIFACT_ID=olm
-VERSION_NAME=3.2.16
+VERSION_NAME=3.2.10

 POM_PACKAGING=aar

--- a/android/olm-sdk/src/main/java/org/matrix/olm/OlmInboundGroupSession.java
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmInboundGroupSession.java
@ -369,29 +369,4 @@ public class OlmInboundGroupSession extends CommonSerializeUtils implements Seri
     * @return the deserialized session
     **/
    private native long deserializeJni(byte[] aSerializedData, byte[] aKey);
-
-    /**
-     * Return a pickled inbound group session as a bytes buffer.<br>
-     * The session is serialized and encrypted with aKey.
-     * In case of failure, an error human readable
-     * description is provide in aErrorMsg.
-     * @param aKey encryption key
-     * @param aErrorMsg error message description
-     * @return the pickled inbound group session as bytes buffer
-     */
-    public byte[] pickle(byte[] aKey, StringBuffer aErrorMsg) {
-        return serialize(aKey, aErrorMsg);
-    }
-
-    /**
-     * Loads an inbound group session from a pickled bytes buffer.<br>
-     * See {@link #serialize(byte[], StringBuffer)}
-     * @param aSerializedData bytes buffer
-     * @param aKey key used to encrypted
-     * @exception Exception the exception
-     */
-    public void unpickle(byte[] aSerializedData, byte[] aKey) throws Exception {
-        deserialize(aSerializedData, aKey);
-    }
-
 }
--- a/android/olm-sdk/src/main/java/org/matrix/olm/OlmOutboundGroupSession.java
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmOutboundGroupSession.java
@ -293,28 +293,4 @@ public class OlmOutboundGroupSession extends CommonSerializeUtils implements Ser
     **/
    private native long deserializeJni(byte[] aSerializedData, byte[] aKey);

-    /**
-     * Return a pickled outbound group session as a bytes buffer.<br>
-     * The session is serialized and encrypted with aKey.
-     * In case of failure, an error human readable
-     * description is provide in aErrorMsg.
-     * @param aKey encryption key
-     * @param aErrorMsg error message description
-     * @return the pickled outbound group session as bytes buffer
-     */
-    public byte[] pickle(byte[] aKey, StringBuffer aErrorMsg) {
-        return serialize(aKey, aErrorMsg);
-    }
-
-    /**
-     * Loads an outbound group session from a pickled bytes buffer.<br>
-     * See {@link #serialize(byte[], StringBuffer)}
-     * @param aSerializedData bytes buffer
-     * @param aKey key used to encrypted
-     * @exception Exception the exception
-     */
-    public void unpickle(byte[] aSerializedData, byte[] aKey) throws Exception {
-        deserialize(aSerializedData, aKey);
-    }
-
 }
--- a/android/olm-sdk/src/main/java/org/matrix/olm/OlmSAS.java
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmSAS.java
@ -106,16 +106,6 @@ public class OlmSAS {
        return null;
    }

-    public String calculateMacFixedBase64(String message, String info) throws OlmException {
-        try {
-            byte[] bytes = calculateMacFixedBase64Jni(message.getBytes("UTF-8"), info.getBytes("UTF-8"));
-            if (bytes != null) return new String(bytes, "UTF-8");
-        } catch (UnsupportedEncodingException e) {
-            throw new OlmException(OlmException.EXCEPTION_CODE_SAS_ERROR, e.getMessage());
-        }
-        return null;
-    }
-
    public String calculateMacLongKdf(String message, String info) throws OlmException {
        try {
            byte[] bytes = calculateMacLongKdfJni(message.getBytes("UTF-8"), info.getBytes("UTF-8"));
@ -150,8 +140,6 @@ public class OlmSAS {

    private native byte[] calculateMacJni(byte[] message, byte[] info);

-    private native byte[] calculateMacFixedBase64Jni(byte[] message, byte[] info);
-
    private native byte[] calculateMacLongKdfJni(byte[] message, byte[] info);

    /**
--- a/android/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmSession.java
@ -465,30 +465,5 @@ public class OlmSession extends CommonSerializeUtils implements Serializable {
     * @return the deserialized session
     **/
    private native long deserializeJni(byte[] aSerializedData, byte[] aKey);
-
-    /**
-     * Return a pickled session as a bytes buffer.<br>
-     * The session is serialized and encrypted with aKey.
-     * In case of failure, an error human readable
-     * description is provide in aErrorMsg.
-     * @param aKey encryption key
-     * @param aErrorMsg error message description
-     * @return the pickled session as bytes buffer
-     */
-    public byte[] pickle(byte[] aKey, StringBuffer aErrorMsg) {
-        return serialize(aKey, aErrorMsg);
-    }
-
-    /**
-     * Loads a session from a pickled bytes buffer.<br>
-     * See {@link #serialize(byte[], StringBuffer)}
-     * @param aSerializedData bytes buffer
-     * @param aKey key used to encrypted
-     * @exception Exception the exception
-     */
-    public void unpickle(byte[] aSerializedData, byte[] aKey) throws Exception {
-        deserialize(aSerializedData, aKey);
-    }
-
 }

--- a/android/olm-sdk/src/main/jni/olm_sas.cpp
+++ b/android/olm-sdk/src/main/jni/olm_sas.cpp
@ -309,86 +309,6 @@ JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(calculateMacJni)(JNIEnv *env, jobject thiz
    return returnValue;
 }

-JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(calculateMacFixedBase64Jni)(JNIEnv *env, jobject thiz,jbyteArray messageBuffer,jbyteArray infoBuffer) {
-    LOGD("## calculateMacFixedBase64Jni(): IN");
-    const char* errorMessage = NULL;
-    jbyteArray returnValue = 0;
-    OlmSAS* sasPtr = getOlmSasInstanceId(env, thiz);
-
-    jbyte *messagePtr = NULL;
-    jboolean messageWasCopied = JNI_FALSE;
-
-    jbyte *infoPtr = NULL;
-    jboolean infoWasCopied = JNI_FALSE;
-
-    if (!sasPtr)
-    {
-        LOGE("## calculateMacFixedBase64Jni(): failure - invalid SAS ptr=NULL");
-        errorMessage = "invalid SAS ptr=NULL";
-    } else if(!messageBuffer) {
-        LOGE("## calculateMacFixedBase64Jni(): failure - invalid message");
-        errorMessage = "invalid info";
-    }
-    else if (!(messagePtr = env->GetByteArrayElements(messageBuffer, &messageWasCopied)))
-    {
-        LOGE(" ## calculateMacFixedBase64Jni(): failure - message JNI allocation OOM");
-        errorMessage = "message JNI allocation OOM";
-    }
-    else if (!(infoPtr = env->GetByteArrayElements(infoBuffer, &infoWasCopied)))
-    {
-        LOGE(" ## calculateMacFixedBase64Jni(): failure - info JNI allocation OOM");
-        errorMessage = "info JNI allocation OOM";
-    } else {
-
-        size_t infoLength = (size_t)env->GetArrayLength(infoBuffer);
-        size_t messageLength = (size_t)env->GetArrayLength(messageBuffer);
-        size_t macLength = olm_sas_mac_length(sasPtr);
-
-        void *macPtr = malloc(macLength*sizeof(uint8_t));
-
-        size_t result = olm_sas_calculate_mac_fixed_base64(sasPtr,messagePtr,messageLength,infoPtr,infoLength,macPtr,macLength);
-        if (result == olm_error())
-        {
-            errorMessage = (const char *)olm_sas_last_error(sasPtr);
-            LOGE("## calculateMacFixedBase64Jni(): failure - error calculating SAS mac Msg=%s", errorMessage);
-        }
-        else
-        {
-            returnValue = env->NewByteArray(macLength);
-            env->SetByteArrayRegion(returnValue, 0 , macLength, (jbyte*)macPtr);
-        }
-
-        if (macPtr) {
-            free(macPtr);
-        }
-    }
-
-    // free alloc
-    if (infoPtr)
-    {
-        if (infoWasCopied)
-        {
-            memset(infoPtr, 0, (size_t)env->GetArrayLength(infoBuffer));
-        }
-        env->ReleaseByteArrayElements(infoBuffer, infoPtr, JNI_ABORT);
-    }
-    if (messagePtr)
-    {
-        if (messageWasCopied)
-        {
-            memset(messagePtr, 0, (size_t)env->GetArrayLength(messageBuffer));
-        }
-        env->ReleaseByteArrayElements(messageBuffer, messagePtr, JNI_ABORT);
-    }
-
-    if (errorMessage)
-    {
-        env->ThrowNew(env->FindClass("java/lang/Exception"), errorMessage);
-    }
-
-    return returnValue;
-}
-
 JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(calculateMacLongKdfJni)(JNIEnv *env, jobject thiz,jbyteArray messageBuffer,jbyteArray infoBuffer) {
    LOGD("## calculateMacLongKdfJni(): IN");
    const char* errorMessage = NULL;
@ -467,4 +387,4 @@ JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(calculateMacLongKdfJni)(JNIEnv *env, jobje
    }

    return returnValue;
-}
+}
--- a/android/olm-sdk/src/main/jni/olm_sas.h
+++ b/android/olm-sdk/src/main/jni/olm_sas.h
@ -32,7 +32,6 @@ JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(getPubKeyJni)(JNIEnv *env, jobject thiz);
 JNIEXPORT void OLM_SAS_FUNC_DEF(setTheirPubKey)(JNIEnv *env, jobject thiz,jbyteArray pubKey);
 JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(generateShortCodeJni)(JNIEnv *env, jobject thiz, jbyteArray infoStringBytes, jint byteNb);
 JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(calculateMacJni)(JNIEnv *env, jobject thiz, jbyteArray messageBuffer, jbyteArray infoBuffer);
-JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(calculateMacFixedBase64Jni)(JNIEnv *env, jobject thiz, jbyteArray messageBuffer, jbyteArray infoBuffer);
 JNIEXPORT jbyteArray OLM_SAS_FUNC_DEF(calculateMacLongKdfJni)(JNIEnv *env, jobject thiz, jbyteArray messageBuffer, jbyteArray infoBuffer);

 #ifdef __cplusplus
--- a/common.mk
+++ b/common.mk
@ -1,4 +1,4 @@

 MAJOR := 3
 MINOR := 2
-PATCH := 16
+PATCH := 10
--- a/docs/megolm.md
+++ b/docs/megolm.md
@ -109,7 +109,7 @@ discriminate between sessions.
 ### Sharing session data

 To allow other participants in the conversation to decrypt messages, the
-session data is formatted as described in [Session-sharing format](#session-sharing-format). It is then
+session data is formatted as described in [Session-sharing format](#Session-sharing-format). It is then
 shared with other participants in the conversation via a secure peer-to-peer
 channel (such as that provided by [Olm][]).

@ -182,13 +182,9 @@ but the decision of which ratchet states to cache is left to the application.

 ## Data exchange formats

-### Session sharing format
+### Session-sharing format

-This format is used for the initial sharing of a Megolm session with other
-group participants who need to be able to read messages encrypted by this
-session.
-
-The session sharing format is as follows:
+The Megolm key-sharing format is as follows:

 ```
 +---+----+--------+--------+--------+--------+------+-----------+
@ -206,33 +202,6 @@ part of the Ed25519 keypair $`K`$.
 The data is then signed using the Ed25519 keypair, and the 64-byte signature is
 appended.

-### Session export format
-
-Once the session is initially shared with the group participants, each
-participant needs to retain a copy of the session if they want to maintain
-their ability to decrypt messages encrypted with that session.
-
-For forward-secrecy purposes, a participant may choose to store a ratcheted
-version of the session. But since the ratchet index is covered by the
-signature, this would invalidate the signature. So we define a similar format,
-called the *session export format*, which is identical to the [session sharing
-format](#session-sharing-format) except for dropping the signature.
-
-The Megolm session export format is thus as follows:
-
-```
-+---+----+--------+--------+--------+--------+------+
-| V | i  | R(i,0) | R(i,1) | R(i,2) | R(i,3) | Kpub |
-+---+----+--------+--------+--------+--------+------+
-0   1    5        37       69      101      133    165   bytes
-```
-
-The version byte, ``V``, is ``"\x01"``.
-
-This is followed by the ratchet index, $`i`$, which is encoded as a
-big-endian 32-bit integer; the ratchet values $`R_{i,j}`$; and the public
-part of the Ed25519 keypair $`K`$.
-
 ### Message format

 Megolm messages consist of a one byte version, followed by a variable length
--- a/flake.lock
+++ b/flake.lock
@ -1,60 +0,0 @@
-{
-  "nodes": {
-    "flake-utils": {
-      "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1664871473,
-        "narHash": "sha256-1LzbW6G6Uz8akWiOdlIi435GAm1ct5jF5tovw/9to0o=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "b7a6fde153d9470afdb6aa1da51c4117f03b84ed",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "npmlock2nix": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1654775747,
-        "narHash": "sha256-9pXHDpIjmsK5390wmpGHu9aA4QOPpegPBvThHeBlef4=",
-        "owner": "nix-community",
-        "repo": "npmlock2nix",
-        "rev": "5c4f247688fc91d665df65f71c81e0726621aaa8",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "npmlock2nix",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "npmlock2nix": "npmlock2nix"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}
--- a/flake.nix
+++ b/flake.nix
@ -1,40 +0,0 @@
-{
-  description = "An implementation of the Double Ratchet cryptographic ratchet";
-
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-  # We can't use the current stable release because of
-  # https://github.com/emscripten-core/emscripten/issues/16913
-  inputs.flake-utils.url = "github:numtide/flake-utils";
-  inputs.npmlock2nix = {
-    url = "github:nix-community/npmlock2nix";
-    flake = false;
-  };
-
-  outputs = { self, nixpkgs, flake-utils, npmlock2nix }:
-    let
-      localOverlay = import ./nix/overlay.nix;
-      pkgsForSystem = system: import nixpkgs {
-        inherit system;
-        overlays = [
-          (final: prev: {
-            npmlock2nix = final.callPackage npmlock2nix {};
-            node_modules = final.npmlock2nix.node_modules { src = ./javascript; };
-          })
-          localOverlay
-        ];
-      };
-    in (
-      # some systems cause issues, e.g. i686-linux is unsupported by gradle,
-      # which causes "nix flake check" to fail. Investigate more later, but for
-      # now, we will just allow x86_64-linux
-      flake-utils.lib.eachSystem [ "x86_64-linux" "x86_64-darwin" "aarch64-darwin" ] (system: rec {
-        legacyPackages = pkgsForSystem system;
-        checks = {
-          inherit (legacyPackages) olm-gcc-cmake olm-clang-cmake olm-gcc-make;
-        };
-        packages = {
-          javascript = legacyPackages.olm-javascript;
-        };
-      }
-    ));
-}
--- a/include/olm/list.hh
+++ b/include/olm/list.hh
@ -99,9 +99,9 @@ public:
            return *this;
        }
        T * this_pos = _data;
-        const T * other_pos = other._data;
+        T * const other_pos = other._data;
        while (other_pos != other._end) {
-            *this_pos = *other_pos;
+            *this_pos = *other;
            ++this_pos;
            ++other_pos;
        }
--- a/include/olm/olm_export.h
+++ b/include/olm/olm_export.h
@ -9,15 +9,15 @@
 #  ifndef OLM_EXPORT
 #    ifdef olm_EXPORTS
        /* We are building this library */
-#      define OLM_EXPORT 
+#      define OLM_EXPORT __attribute__((visibility("default")))
 #    else
        /* We are using this library */
-#      define OLM_EXPORT 
+#      define OLM_EXPORT __attribute__((visibility("default")))
 #    endif
 #  endif

 #  ifndef OLM_NO_EXPORT
-#    define OLM_NO_EXPORT 
+#    define OLM_NO_EXPORT __attribute__((visibility("hidden")))
 #  endif
 #endif

--- a/javascript/index.d.ts
+++ b/javascript/index.d.ts
@ -18,28 +18,28 @@ export as namespace Olm;

 declare class Account {
    constructor();
-    free(): void;
-    create(): void;
+    free();
+    create();
    identity_keys(): string;
    sign(message: string | Uint8Array): string;
    one_time_keys(): string;
-    mark_keys_as_published(): void;
+    mark_keys_as_published();
    max_number_of_one_time_keys(): number;
-    generate_one_time_keys(number_of_keys: number): void;
-    remove_one_time_keys(session: Session): void;
-    generate_fallback_key(): void;
+    generate_one_time_keys(number_of_keys: number);
+    remove_one_time_keys(session: Session);
+    generate_fallback_key();
    fallback_key(): string;
    unpublished_fallback_key(): string;
    forget_old_fallback_key(): void;
    pickle(key: string | Uint8Array): string;
-    unpickle(key: string | Uint8Array, pickle: string): void;
+    unpickle(key: string | Uint8Array, pickle: string);
 }

 declare class Session {
    constructor();
    free(): void;
    pickle(key: string | Uint8Array): string;
-    unpickle(key: string | Uint8Array, pickle: string): void;
+    unpickle(key: string | Uint8Array, pickle: string);
    create_outbound(
        account: Account, their_identity_key: string, their_one_time_key: string,
    ): void;
@ -51,10 +51,7 @@ declare class Session {
    has_received_message(): boolean;
    matches_inbound(one_time_key_message: string): boolean;
    matches_inbound_from(identity_key: string, one_time_key_message: string): boolean;
-    encrypt(plaintext: string): {
-        type: 0 | 1; // 0: PreKey, 1: Message
-        body: string;
-    };
+    encrypt(plaintext: string): object;
    decrypt(message_type: number, message: string): string;
    describe(): string;
 }
@ -70,13 +67,10 @@ declare class InboundGroupSession {
    constructor();
    free(): void;
    pickle(key: string | Uint8Array): string;
-    unpickle(key: string | Uint8Array, pickle: string): void;
+    unpickle(key: string | Uint8Array, pickle: string);
    create(session_key: string): string;
    import_session(session_key: string): string;
-    decrypt(message: string): {
-        message_index: number;
-        plaintext: string;
-    };
+    decrypt(message: string): object;
    session_id(): string;
    first_known_index(): number;
    export_session(message_index: number): string;
@ -86,7 +80,7 @@ declare class OutboundGroupSession {
    constructor();
    free(): void;
    pickle(key: string | Uint8Array): string;
-    unpickle(key: string | Uint8Array, pickle: string): void;
+    unpickle(key: string | Uint8Array, pickle: string);
    create(): void;
    encrypt(plaintext: string): string;
    session_id(): string;
@ -98,11 +92,7 @@ declare class PkEncryption {
    constructor();
    free(): void;
    set_recipient_key(key: string): void;
-    encrypt(plaintext: string): {
-        ciphertext: string;
-        mac: string;
-        ephemeral: string;
-    };
+    encrypt(plaintext: string): object;
 }

 declare class PkDecryption {
@ -131,7 +121,6 @@ declare class SAS {
    set_their_key(their_key: string): void;
    generate_bytes(info: string, length: number): Uint8Array;
    calculate_mac(input: string, info: string): string;
-    calculate_mac_fixed_base64(input: string, info: string): string;
    calculate_mac_long_kdf(input: string, info: string): string;
 }

--- a/javascript/olm_inbound_group_session.js
+++ b/javascript/olm_inbound_group_session.js
@ -1,4 +1,3 @@
-/** @constructor */
 function InboundGroupSession() {
    var size = Module['_olm_inbound_group_session_size']();
    this.buf = malloc(size);
--- a/javascript/olm_outbound_group_session.js
+++ b/javascript/olm_outbound_group_session.js
@ -1,4 +1,3 @@
-/** @constructor */
 function OutboundGroupSession() {
    var size = Module['_olm_outbound_group_session_size']();
    this.buf = malloc(size);
--- a/javascript/olm_pk.js
+++ b/javascript/olm_pk.js
@ -1,4 +1,3 @@
-/** @constructor */
 function PkEncryption() {
    var size = Module['_olm_pk_encryption_size']();
    this.buf = malloc(size);
@ -99,7 +98,6 @@ PkEncryption.prototype['encrypt'] = restore_stack(function(
 });


-/** @constructor */
 function PkDecryption() {
    var size = Module['_olm_pk_decryption_size']();
    this.buf = malloc(size);
@ -275,7 +273,6 @@ PkDecryption.prototype['decrypt'] = restore_stack(function (
 })


-/** @constructor */
 function PkSigning() {
    var size = Module['_olm_pk_signing_size']();
    this.buf = malloc(size);
--- a/javascript/olm_post.js
+++ b/javascript/olm_post.js
@ -44,7 +44,6 @@ function bzero(ptr, n) {
    }
 }

-/** @constructor */
 function Account() {
    var size = Module['_olm_account_size']();
    this.buf = malloc(size);
@ -245,7 +244,6 @@ Account.prototype['unpickle'] = restore_stack(function(key, pickle) {
    }
 });

-/** @constructor */
 function Session() {
    var size = Module['_olm_session_size']();
    this.buf = malloc(size);
@ -532,7 +530,6 @@ Session.prototype['describe'] = restore_stack(function() {
    }
 });

-/** @constructor */
 function Utility() {
    var size = Module['_olm_utility_size']();
    this.buf = malloc(size);
--- a/javascript/olm_pre.js
+++ b/javascript/olm_pre.js
@ -14,6 +14,7 @@ if (typeof(window) !== 'undefined') {
        var bytes = nodeCrypto['randomBytes'](buf.length);
        buf.set(bytes);
    };
+    process = global["process"];
 } else {
    throw new Error("Cannot find global to attach library to");
 }
--- a/javascript/olm_sas.js
+++ b/javascript/olm_sas.js
@ -1,4 +1,3 @@
-/** @constructor */
 function SAS() {
    var size = Module['_olm_sas_size']();
    var random_length = Module['_olm_create_sas_random_length']();
@ -83,22 +82,6 @@ SAS.prototype['calculate_mac'] = restore_stack(function(input, info) {
    return UTF8ToString(mac_buffer, mac_length);
 });

-SAS.prototype['calculate_mac_fixed_base64'] = restore_stack(function(input, info) {
-    var input_array = array_from_string(input);
-    var input_buffer = stack(input_array);
-    var info_array = array_from_string(info);
-    var info_buffer = stack(info_array);
-    var mac_length = sas_method(Module['_olm_sas_mac_length'])(this.ptr);
-    var mac_buffer = stack(mac_length + NULL_BYTE_PADDING_LENGTH);
-    sas_method(Module['_olm_sas_calculate_mac_fixed_base64'])(
-        this.ptr,
-        input_buffer, input_array.length,
-        info_buffer, info_array.length,
-        mac_buffer, mac_length
-    );
-    return UTF8ToString(mac_buffer, mac_length);
-});
-
 SAS.prototype['calculate_mac_long_kdf'] = restore_stack(function(input, info) {
    var input_array = array_from_string(input);
    var input_buffer = stack(input_array);
--- a/javascript/package-lock.json
+++ b/javascript/package-lock.json
@ -1,241 +0,0 @@
-{
-  "name": "@matrix-org/olm",
-  "version": "3.2.11",
-  "lockfileVersion": 2,
-  "requires": true,
-  "packages": {
-    "": {
-      "name": "@matrix-org/olm",
-      "version": "3.2.11",
-      "license": "Apache-2.0",
-      "devDependencies": {
-        "jasmine": "^3.0.0"
-      }
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
-      "dev": true
-    },
-    "node_modules/brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dev": true,
-      "dependencies": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
-    "node_modules/concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
-      "dev": true
-    },
-    "node_modules/fs.realpath": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
-      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
-      "dev": true
-    },
-    "node_modules/glob": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
-      "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
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-        "once": "^1.3.0",
-        "path-is-absolute": "^1.0.0"
-      },
-      "engines": {
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-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
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-      "bin": {
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-    "node_modules/jasmine-core": {
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-      }
-    },
-    "path-is-absolute": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
-      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
-      "dev": true
-    },
-    "wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
-    }
-  }
-}
--- a/javascript/package.json
+++ b/javascript/package.json
@ -1,6 +1,6 @@
 {
  "name": "@matrix-org/olm",
-  "version": "3.2.16",
+  "version": "3.2.10",
  "description": "An implementation of the Double Ratchet cryptographic ratchet",
  "main": "olm.js",
  "files": [
@ -31,5 +31,8 @@
  "homepage": "https://gitlab.matrix.org/matrix-org/olm",
  "devDependencies": {
    "jasmine": "^3.0.0"
+  },
+  "publishConfig": {
+    "@matrix-org:registry":"https://gitlab.matrix.org/api/v4/projects/27/packages/npm/"
  }
 }
--- a/lib/crypto-algorithms/aes.h
+++ b/lib/crypto-algorithms/aes.h
@ -1,123 +1,123 @@
-/*********************************************************************
-* Filename:   aes.h
-* Author:     Brad Conte (brad AT bradconte.com)
-* Copyright:
-* Disclaimer: This code is presented "as is" without any guarantees.
-* Details:    Defines the API for the corresponding AES implementation.
-*********************************************************************/
-
-#ifndef AES_H
-#define AES_H
-
-/*************************** HEADER FILES ***************************/
-#include <stddef.h>
-#include <stdint.h>
-/****************************** MACROS ******************************/
-#define AES_BLOCK_SIZE 16               // AES operates on 16 bytes at a time
-
-/**************************** DATA TYPES ****************************/
-typedef uint8_t BYTE;            // 8-bit byte
-typedef uint32_t WORD;             // 32-bit word, change to "long" for 16-bit machines
-
-/*********************** FUNCTION DECLARATIONS **********************/
-///////////////////
-// AES
-///////////////////
-// Key setup must be done before any AES en/de-cryption functions can be used.
-void aes_key_setup(const BYTE key[],          // The key, must be 128, 192, or 256 bits
-                   WORD w[],                  // Output key schedule to be used later
-                   int keysize);              // Bit length of the key, 128, 192, or 256
-
-void aes_encrypt(const BYTE in[],             // 16 bytes of plaintext
-                 BYTE out[],                  // 16 bytes of ciphertext
-                 const WORD key[],            // From the key setup
-                 int keysize);                // Bit length of the key, 128, 192, or 256
-
-void aes_decrypt(const BYTE in[],             // 16 bytes of ciphertext
-                 BYTE out[],                  // 16 bytes of plaintext
-                 const WORD key[],            // From the key setup
-                 int keysize);                // Bit length of the key, 128, 192, or 256
-
-///////////////////
-// AES - CBC
-///////////////////
-int aes_encrypt_cbc(const BYTE in[],          // Plaintext
-                    size_t in_len,            // Must be a multiple of AES_BLOCK_SIZE
-                    BYTE out[],               // Ciphertext, same length as plaintext
-                    const WORD key[],         // From the key setup
-                    int keysize,              // Bit length of the key, 128, 192, or 256
-                    const BYTE iv[]);         // IV, must be AES_BLOCK_SIZE bytes long
-
-// Only output the CBC-MAC of the input.
-int aes_encrypt_cbc_mac(const BYTE in[],      // plaintext
-                        size_t in_len,        // Must be a multiple of AES_BLOCK_SIZE
-                        BYTE out[],           // Output MAC
-                        const WORD key[],     // From the key setup
-                        int keysize,          // Bit length of the key, 128, 192, or 256
-                        const BYTE iv[]);     // IV, must be AES_BLOCK_SIZE bytes long
-
-///////////////////
-// AES - CTR
-///////////////////
-void increment_iv(BYTE iv[],                  // Must be a multiple of AES_BLOCK_SIZE
-                  int counter_size);          // Bytes of the IV used for counting (low end)
-
-void aes_encrypt_ctr(const BYTE in[],         // Plaintext
-                     size_t in_len,           // Any byte length
-                     BYTE out[],              // Ciphertext, same length as plaintext
-                     const WORD key[],        // From the key setup
-                     int keysize,             // Bit length of the key, 128, 192, or 256
-                     const BYTE iv[]);        // IV, must be AES_BLOCK_SIZE bytes long
-
-void aes_decrypt_ctr(const BYTE in[],         // Ciphertext
-                     size_t in_len,           // Any byte length
-                     BYTE out[],              // Plaintext, same length as ciphertext
-                     const WORD key[],        // From the key setup
-                     int keysize,             // Bit length of the key, 128, 192, or 256
-                     const BYTE iv[]);        // IV, must be AES_BLOCK_SIZE bytes long
-
-///////////////////
-// AES - CCM
-///////////////////
-// Returns True if the input parameters do not violate any constraint.
-int aes_encrypt_ccm(const BYTE plaintext[],              // IN  - Plaintext.
-                    WORD plaintext_len,                  // IN  - Plaintext length.
-                    const BYTE associated_data[],        // IN  - Associated Data included in authentication, but not encryption.
-                    unsigned short associated_data_len,  // IN  - Associated Data length in bytes.
-                    const BYTE nonce[],                  // IN  - The Nonce to be used for encryption.
-                    unsigned short nonce_len,            // IN  - Nonce length in bytes.
-                    BYTE ciphertext[],                   // OUT - Ciphertext, a concatination of the plaintext and the MAC.
-                    WORD *ciphertext_len,                // OUT - The length of the ciphertext, always plaintext_len + mac_len.
-                    WORD mac_len,                        // IN  - The desired length of the MAC, must be 4, 6, 8, 10, 12, 14, or 16.
-                    const BYTE key[],                    // IN  - The AES key for encryption.
-                    int keysize);                        // IN  - The length of the key in bits. Valid values are 128, 192, 256.
-
-// Returns True if the input parameters do not violate any constraint.
-// Use mac_auth to ensure decryption/validation was preformed correctly.
-// If authentication does not succeed, the plaintext is zeroed out. To overwride
-// this, call with mac_auth = NULL. The proper proceedure is to decrypt with
-// authentication enabled (mac_auth != NULL) and make a second call to that
-// ignores authentication explicitly if the first call failes.
-int aes_decrypt_ccm(const BYTE ciphertext[],             // IN  - Ciphertext, the concatination of encrypted plaintext and MAC.
-                    WORD ciphertext_len,                 // IN  - Ciphertext length in bytes.
-                    const BYTE assoc[],                  // IN  - The Associated Data, required for authentication.
-                    unsigned short assoc_len,            // IN  - Associated Data length in bytes.
-                    const BYTE nonce[],                  // IN  - The Nonce to use for decryption, same one as for encryption.
-                    unsigned short nonce_len,            // IN  - Nonce length in bytes.
-                    BYTE plaintext[],                    // OUT - The plaintext that was decrypted. Will need to be large enough to hold ciphertext_len - mac_len.
-                    WORD *plaintext_len,                 // OUT - Length in bytes of the output plaintext, always ciphertext_len - mac_len .
-                    WORD mac_len,                        // IN  - The length of the MAC that was calculated.
-                    int *mac_auth,                       // OUT - TRUE if authentication succeeded, FALSE if it did not. NULL pointer will ignore the authentication.
-                    const BYTE key[],                    // IN  - The AES key for decryption.
-                    int keysize);                        // IN  - The length of the key in BITS. Valid values are 128, 192, 256.
-
-///////////////////
-// Test functions
-///////////////////
-int aes_test();
-int aes_ecb_test();
-int aes_cbc_test();
-int aes_ctr_test();
-int aes_ccm_test();
-
-#endif   // AES_H
+/*********************************************************************
+* Filename:   aes.h
+* Author:     Brad Conte (brad AT bradconte.com)
+* Copyright:
+* Disclaimer: This code is presented "as is" without any guarantees.
+* Details:    Defines the API for the corresponding AES implementation.
+*********************************************************************/
+
+#ifndef AES_H
+#define AES_H
+
+/*************************** HEADER FILES ***************************/
+#include <stddef.h>
+
+/****************************** MACROS ******************************/
+#define AES_BLOCK_SIZE 16               // AES operates on 16 bytes at a time
+
+/**************************** DATA TYPES ****************************/
+typedef unsigned char BYTE;            // 8-bit byte
+typedef unsigned int WORD;             // 32-bit word, change to "long" for 16-bit machines
+
+/*********************** FUNCTION DECLARATIONS **********************/
+///////////////////
+// AES
+///////////////////
+// Key setup must be done before any AES en/de-cryption functions can be used.
+void aes_key_setup(const BYTE key[],          // The key, must be 128, 192, or 256 bits
+                   WORD w[],                  // Output key schedule to be used later
+                   int keysize);              // Bit length of the key, 128, 192, or 256
+
+void aes_encrypt(const BYTE in[],             // 16 bytes of plaintext
+                 BYTE out[],                  // 16 bytes of ciphertext
+                 const WORD key[],            // From the key setup
+                 int keysize);                // Bit length of the key, 128, 192, or 256
+
+void aes_decrypt(const BYTE in[],             // 16 bytes of ciphertext
+                 BYTE out[],                  // 16 bytes of plaintext
+                 const WORD key[],            // From the key setup
+                 int keysize);                // Bit length of the key, 128, 192, or 256
+
+///////////////////
+// AES - CBC
+///////////////////
+int aes_encrypt_cbc(const BYTE in[],          // Plaintext
+                    size_t in_len,            // Must be a multiple of AES_BLOCK_SIZE
+                    BYTE out[],               // Ciphertext, same length as plaintext
+                    const WORD key[],         // From the key setup
+                    int keysize,              // Bit length of the key, 128, 192, or 256
+                    const BYTE iv[]);         // IV, must be AES_BLOCK_SIZE bytes long
+
+// Only output the CBC-MAC of the input.
+int aes_encrypt_cbc_mac(const BYTE in[],      // plaintext
+                        size_t in_len,        // Must be a multiple of AES_BLOCK_SIZE
+                        BYTE out[],           // Output MAC
+                        const WORD key[],     // From the key setup
+                        int keysize,          // Bit length of the key, 128, 192, or 256
+                        const BYTE iv[]);     // IV, must be AES_BLOCK_SIZE bytes long
+
+///////////////////
+// AES - CTR
+///////////////////
+void increment_iv(BYTE iv[],                  // Must be a multiple of AES_BLOCK_SIZE
+                  int counter_size);          // Bytes of the IV used for counting (low end)
+
+void aes_encrypt_ctr(const BYTE in[],         // Plaintext
+                     size_t in_len,           // Any byte length
+                     BYTE out[],              // Ciphertext, same length as plaintext
+                     const WORD key[],        // From the key setup
+                     int keysize,             // Bit length of the key, 128, 192, or 256
+                     const BYTE iv[]);        // IV, must be AES_BLOCK_SIZE bytes long
+
+void aes_decrypt_ctr(const BYTE in[],         // Ciphertext
+                     size_t in_len,           // Any byte length
+                     BYTE out[],              // Plaintext, same length as ciphertext
+                     const WORD key[],        // From the key setup
+                     int keysize,             // Bit length of the key, 128, 192, or 256
+                     const BYTE iv[]);        // IV, must be AES_BLOCK_SIZE bytes long
+
+///////////////////
+// AES - CCM
+///////////////////
+// Returns True if the input parameters do not violate any constraint.
+int aes_encrypt_ccm(const BYTE plaintext[],              // IN  - Plaintext.
+                    WORD plaintext_len,                  // IN  - Plaintext length.
+                    const BYTE associated_data[],        // IN  - Associated Data included in authentication, but not encryption.
+                    unsigned short associated_data_len,  // IN  - Associated Data length in bytes.
+                    const BYTE nonce[],                  // IN  - The Nonce to be used for encryption.
+                    unsigned short nonce_len,            // IN  - Nonce length in bytes.
+                    BYTE ciphertext[],                   // OUT - Ciphertext, a concatination of the plaintext and the MAC.
+                    WORD *ciphertext_len,                // OUT - The length of the ciphertext, always plaintext_len + mac_len.
+                    WORD mac_len,                        // IN  - The desired length of the MAC, must be 4, 6, 8, 10, 12, 14, or 16.
+                    const BYTE key[],                    // IN  - The AES key for encryption.
+                    int keysize);                        // IN  - The length of the key in bits. Valid values are 128, 192, 256.
+
+// Returns True if the input parameters do not violate any constraint.
+// Use mac_auth to ensure decryption/validation was preformed correctly.
+// If authentication does not succeed, the plaintext is zeroed out. To overwride
+// this, call with mac_auth = NULL. The proper proceedure is to decrypt with
+// authentication enabled (mac_auth != NULL) and make a second call to that
+// ignores authentication explicitly if the first call failes.
+int aes_decrypt_ccm(const BYTE ciphertext[],             // IN  - Ciphertext, the concatination of encrypted plaintext and MAC.
+                    WORD ciphertext_len,                 // IN  - Ciphertext length in bytes.
+                    const BYTE assoc[],                  // IN  - The Associated Data, required for authentication.
+                    unsigned short assoc_len,            // IN  - Associated Data length in bytes.
+                    const BYTE nonce[],                  // IN  - The Nonce to use for decryption, same one as for encryption.
+                    unsigned short nonce_len,            // IN  - Nonce length in bytes.
+                    BYTE plaintext[],                    // OUT - The plaintext that was decrypted. Will need to be large enough to hold ciphertext_len - mac_len.
+                    WORD *plaintext_len,                 // OUT - Length in bytes of the output plaintext, always ciphertext_len - mac_len .
+                    WORD mac_len,                        // IN  - The length of the MAC that was calculated.
+                    int *mac_auth,                       // OUT - TRUE if authentication succeeded, FALSE if it did not. NULL pointer will ignore the authentication.
+                    const BYTE key[],                    // IN  - The AES key for decryption.
+                    int keysize);                        // IN  - The length of the key in BITS. Valid values are 128, 192, 256.
+
+///////////////////
+// Test functions
+///////////////////
+int aes_test();
+int aes_ecb_test();
+int aes_cbc_test();
+int aes_ctr_test();
+int aes_ccm_test();
+
+#endif   // AES_H
--- a/lib/crypto-algorithms/sha256.h
+++ b/lib/crypto-algorithms/sha256.h
@ -11,14 +11,13 @@

 /*************************** HEADER FILES ***************************/
 #include <stddef.h>
-#include <stdint.h>

 /****************************** MACROS ******************************/
 #define SHA256_BLOCK_SIZE 32            // SHA256 outputs a 32 byte digest

 /**************************** DATA TYPES ****************************/
-typedef uint8_t BYTE;             // 8-bit byte
-typedef uint32_t  WORD;             // 32-bit word, change to "long" for 16-bit machines
+typedef unsigned char BYTE;             // 8-bit byte
+typedef unsigned int  WORD;             // 32-bit word, change to "long" for 16-bit machines

 typedef struct {
 	BYTE data[64];
--- a/lib/doctest/doctest/doctest.h
+++ b/lib/doctest/doctest/doctest.h
@ -4498,7 +4498,7 @@ namespace {
            sigaltstack(&sigStack, &oldSigStack);
            struct sigaction sa = {};
            sa.sa_handler       = handleSignal; // NOLINT
-            sa.sa_flags         = SS_ONSTACK;
+            sa.sa_flags         = SA_ONSTACK;
            for(std::size_t i = 0; i < DOCTEST_COUNTOF(signalDefs); ++i) {
                sigaction(signalDefs[i].id, &sa, &oldSigActions[i]);
            }
--- a/lib/doctest/doctest/parts/doctest.cpp
+++ b/lib/doctest/doctest/parts/doctest.cpp
@ -1684,7 +1684,7 @@ namespace {
            sigaltstack(&sigStack, &oldSigStack);
            struct sigaction sa = {};
            sa.sa_handler       = handleSignal; // NOLINT
-            sa.sa_flags         = SS_ONSTACK;
+            sa.sa_flags         = SA_ONSTACK;
            for(std::size_t i = 0; i < DOCTEST_COUNTOF(signalDefs); ++i) {
                sigaction(signalDefs[i].id, &sa, &oldSigActions[i]);
            }
--- a/nix/overlay.nix
+++ b/nix/overlay.nix
@ -1,76 +0,0 @@
-final: prev: {
-  olm-gcc-cmake = prev.gccStdenv.mkDerivation {
-    name = "olm_gcc_cmake";
-
-    src = ./..;
-
-    nativeBuildInputs = [ prev.cmake ];
-    doCheck = true;
-    checkPhase = ''
-      (cd tests && ctest . -j $NIX_BUILD_CORES)
-    '';
-  };
-
-  olm-clang-cmake = prev.clangStdenv.mkDerivation {
-    name = "olm_clang_cmake";
-
-    src = ./..;
-
-    nativeBuildInputs = [ prev.cmake ];
-
-    doCheck = true;
-    checkPhase = ''
-      (cd tests && ctest . -j $NIX_BUILD_CORES)
-    '';
-  };
-
-  olm-gcc-make = prev.gccStdenv.mkDerivation {
-    name = "olm";
-
-    src = ./..;
-
-    doCheck = true;
-    makeFlags = [ "PREFIX=$out" ];
-  };
-
-  olm-javascript = final.buildEmscriptenPackage {
-    pname = "olm_javascript";
-    inherit (builtins.fromJSON (builtins.readFile ../javascript/package.json)) version;
-
-    src = ./..;
-
-    nativeBuildInputs = with prev; [ gnumake python3 nodejs ];
-
-    postPatch = ''
-      patchShebangs .
-    '';
-
-    configurePhase = false;
-
-    buildPhase = ''
-      export EM_CACHE=$TMPDIR
-      make javascript/exported_functions.json
-      make js
-    '';
-
-    installPhase = ''
-      mkdir -p $out/javascript
-      cd javascript
-      echo sha256: > checksums.txt
-      sha256sum olm.js olm_legacy.js olm.wasm >> checksums.txt
-      echo sha512: >> checksums.txt
-      sha512sum olm.js olm_legacy.js olm.wasm >> checksums.txt
-      cp package.json olm.js olm.wasm olm_legacy.js index.d.ts README.md checksums.txt $out/javascript
-      cd ..
-    '';
-
-    checkPhase = ''
-      cd javascript
-      export HOME=$TMPDIR
-      ln -s ${final.node_modules}/node_modules ./node_modules
-      npm test
-      cd ..
-    '';
-  };
-
-}
--- a/olm.pc.in
+++ b/olm.pc.in
@ -1,7 +1,7 @@
 prefix=@CMAKE_INSTALL_PREFIX@
 exec_prefix=${prefix}
-includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
-libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@

 Name: olm
 Description: implementation of the Double Ratchet cryptographic ratchet in C++
--- a/python/.gitlab-ci.yml
+++ b/python/.gitlab-ci.yml
@ -34,7 +34,7 @@ test:python:
  image: docker.io/python:$PYTHON_VERSIONS
  parallel:
    matrix:
-      - PYTHON_VERSIONS: [ "3.8", "3.9", "3.10", "3.11", "3.12" ]
+      - PYTHON_VERSIONS: [ "3.6", "3.7", "3.8", "3.9" ]
  script:
    - pip install tox
    - make headers
--- a/python/MANIFEST.in
+++ b/python/MANIFEST.in
@ -1,3 +1,5 @@
-include include/olm/*.h
+include include/olm/olm.h
+include include/olm/pk.h
+include include/olm/sas.h
 include Makefile
 include olm_build.py
--- a/python/Makefile
+++ b/python/Makefile
@ -20,9 +20,6 @@ include/olm/error.h: include/olm/olm.h ../include/olm/error.h

 headers: include/olm/olm.h include/olm/pk.h include/olm/sas.h include/olm/error.h

-olm-python3: headers
-	DEVELOP=$(DEVELOP) python3 setup.py build
-
 install: install-python3

 install-python3: olm-python3
--- a/python/README.md
+++ b/python/README.md
@ -15,18 +15,6 @@ found [here][6].

 The full API reference can be found [here][7].

-# Installation instructions
-
-To install from the source package, you will need:
-
- cmake (recommended) or GNU make
- a C/C++ compiler
-
-You can then run `pip install python-olm`.
-
-This should work in UNIX-like environments, including macOS, and may work in
-other environments too, but is known to not work yet in Windows.
-
 # Accounts

 Accounts create and hold the central identity of the Olm protocol, they consist of a fingerprint and identity
@ -169,5 +157,5 @@ Pickling works the same way as for peer-to-peer Olm sessions.
 [3]: https://cffi.readthedocs.io/en/latest/
 [4]: https://git.matrix.org/git/olm/about/docs/olm.rst
 [5]: https://git.matrix.org/git/olm/about/docs/megolm.rst
-[6]: https://matrix.org/docs/guides/end-to-end-encryption-implementation-guide
+[6]: https://matrix.org/docs/guides/e2e_implementation.html
 [7]: https://poljar.github.io/python-olm/html/index.html
--- a/python/make_sdist.sh
+++ b/python/make_sdist.sh
@ -1,35 +0,0 @@
-#!/bin/bash
-set -e
-
-DIR=$(mktemp -d)
-SRC=$(pwd)
-
-echo "Making headers"
-make headers
-
-cd $DIR
-
-echo "Copying python module"
-cp -a $SRC/* .
-mkdir -p libolm
-echo "Cleaning sources"
-make clean > /dev/null
-cp -a $SRC/include .
-echo "Copying libolm sources"
-for src in cmake CMakeLists.txt common.mk include lib Makefile olm.pc.in src tests; do
-    cp -a $SRC/../$src libolm
-done
-find libolm -name \*~ -delete
-find libolm -name \#\*\# -delete
-
-echo "Building"
-patch -p1 < $SRC/packaging.diff
-python3 -m build -s
-
-echo "Copying result"
-mkdir -p $SRC/dist
-cp dist/* $SRC/dist
-
-echo "Cleaning up"
-cd $SRC
-rm -rf $DIR
--- a/python/olm/version.py
+++ b/python/olm/version.py
@ -0,0 +1,9 @@
+__title__ = "python-olm"
+__description__ = ("python CFFI bindings for the olm "
+                   "cryptographic ratchet library")
+__url__ = "https://github.com/poljar/python-olm"
+__version__ = "3.2.10"
+__author__ = "Damir Jelić"
+__author_email__ = "poljar@termina.org.uk"
+__license__ = "Apache 2.0"
+__copyright__ = "Copyright 2018-2019 Damir Jelić"
--- a/python/olm/_finalize.py
+++ b/python/olm/_finalize.py
@ -23,6 +23,7 @@

 This is designed for avoiding __del__.
 """
+from __future__ import print_function

 import sys
 import traceback
--- a/python/olm/account.py
+++ b/python/olm/account.py
@ -32,6 +32,8 @@ import json
 from builtins import bytes, super
 from typing import AnyStr, Dict, Optional, Type

+from future.utils import bytes_to_native_str
+
 # pylint: disable=no-name-in-module
 from _libolm import ffi, lib  # type: ignore

@ -91,7 +93,8 @@ class Account(object):
        if ret != lib.olm_error():
            return

-        last_error = ffi.string((lib.olm_account_last_error(self._account))).decode()
+        last_error = bytes_to_native_str(
+            ffi.string((lib.olm_account_last_error(self._account))))

        raise OlmAccountError(last_error)

@ -206,7 +209,7 @@ class Account(object):
                for i in range(0, len(bytes_message)):
                    bytes_message[i] = 0

-        return ffi.unpack(out_buffer, out_length).decode()
+        return bytes_to_native_str(ffi.unpack(out_buffer, out_length))

    @property
    def max_one_time_keys(self):
--- a/python/olm/group_session.py
+++ b/python/olm/group_session.py
@ -28,6 +28,8 @@ Examples:
 from builtins import bytes, super
 from typing import AnyStr, Optional, Tuple, Type

+from future.utils import bytes_to_native_str
+
 # pylint: disable=no-name-in-module
 from _libolm import ffi, lib  # type: ignore

@ -169,9 +171,8 @@ class InboundGroupSession(object):
        if ret != lib.olm_error():
            return

-        last_error = ffi.string(
-            lib.olm_inbound_group_session_last_error(self._session)
-        ).decode()
+        last_error = bytes_to_native_str(ffi.string(
+            lib.olm_inbound_group_session_last_error(self._session)))

        raise OlmGroupSessionError(last_error)

@ -251,7 +252,7 @@ class InboundGroupSession(object):
            id_length
        )
        self._check_error(ret)
-        return ffi.unpack(id_buffer, id_length).decode()
+        return bytes_to_native_str(ffi.unpack(id_buffer, id_length))

    @property
    def first_known_index(self):
@ -289,7 +290,7 @@ class InboundGroupSession(object):
            message_index
        )
        self._check_error(ret)
-        export_str = ffi.unpack(export_buffer, export_length).decode()
+        export_str = bytes_to_native_str(ffi.unpack(export_buffer, export_length))

        # clear out copies of the key
        lib.memset(export_buffer, 0, export_length)
@ -372,9 +373,9 @@ class OutboundGroupSession(object):
        if ret != lib.olm_error():
            return

-        last_error = ffi.string(
+        last_error = bytes_to_native_str(ffi.string(
            lib.olm_outbound_group_session_last_error(self._session)
-        ).decode()
+        ))

        raise OlmGroupSessionError(last_error)

@ -482,7 +483,7 @@ class OutboundGroupSession(object):
                for i in range(0, len(byte_plaintext)):
                    byte_plaintext[i] = 0

-        return ffi.unpack(message_buffer, message_length).decode()
+        return bytes_to_native_str(ffi.unpack(message_buffer, message_length))

    @property
    def id(self):
@ -498,7 +499,7 @@ class OutboundGroupSession(object):
        )
        self._check_error(ret)

-        return ffi.unpack(id_buffer, id_length).decode()
+        return bytes_to_native_str(ffi.unpack(id_buffer, id_length))

    @property
    def message_index(self):
@ -528,4 +529,4 @@ class OutboundGroupSession(object):
        )
        self._check_error(ret)

-        return ffi.unpack(key_buffer, key_length).decode()
+        return bytes_to_native_str(ffi.unpack(key_buffer, key_length))
--- a/python/olm/pk.py
+++ b/python/olm/pk.py
@ -36,6 +36,8 @@ Examples:
 from builtins import super
 from typing import AnyStr, Type

+from future.utils import bytes_to_native_str
+
 from _libolm import ffi, lib  # type: ignore

 from ._compat import URANDOM, to_bytearray, to_unicode_str
@ -114,9 +116,8 @@ class PkEncryption(object):
        if ret != lib.olm_error():
            return

-        last_error = ffi.string(
-            lib.olm_pk_encryption_last_error(self._pk_encryption)
-        ).decode()
+        last_error = bytes_to_native_str(
+            ffi.string(lib.olm_pk_encryption_last_error(self._pk_encryption)))

        raise PkEncryptionError(last_error)

@ -165,9 +166,12 @@ class PkEncryption(object):
                    byte_plaintext[i] = 0

        message = PkMessage(
-            ffi.unpack(ephemeral_key, ephemeral_key_size).decode(),
-            ffi.unpack(mac, mac_length).decode(),
-            ffi.unpack(ciphertext, ciphertext_length).decode(),
+            bytes_to_native_str(
+                ffi.unpack(ephemeral_key, ephemeral_key_size)),
+            bytes_to_native_str(
+                ffi.unpack(mac, mac_length)),
+            bytes_to_native_str(
+                ffi.unpack(ciphertext, ciphertext_length))
        )
        return message

@ -213,19 +217,18 @@ class PkDecryption(object):
            random_buffer, random_length
        )
        self._check_error(ret)
-        self.public_key: str = ffi.unpack(
+        self.public_key = bytes_to_native_str(ffi.unpack(
            key_buffer,
            key_length
-        ).decode()
+        ))

    def _check_error(self, ret):
        # type: (int) -> None
        if ret != lib.olm_error():
            return

-        last_error = ffi.string(
-            lib.olm_pk_decryption_last_error(self._pk_decryption)
-        ).decode()
+        last_error = bytes_to_native_str(
+            ffi.string(lib.olm_pk_decryption_last_error(self._pk_decryption)))

        raise PkDecryptionError(last_error)

@ -264,7 +267,7 @@ class PkDecryption(object):

    @classmethod
    def from_pickle(cls, pickle, passphrase=""):
-        # type: (bytes, str) -> PkDecryption
+        # types: (bytes, str) -> PkDecryption
        """Restore a previously stored PkDecryption object.

        Creates a PkDecryption object from a pickled base64 string. Decrypts
@ -303,15 +306,15 @@ class PkDecryption(object):
            for i in range(0, len(byte_key)):
                byte_key[i] = 0

-        obj.public_key = ffi.unpack(
+        obj.public_key = bytes_to_native_str(ffi.unpack(
            pubkey_buffer,
            pubkey_length
-        ).decode()
+        ))

        return obj

    def decrypt(self, message, unicode_errors="replace"):
-        # type: (PkMessage, str) -> str
+        # type (PkMessage, str) -> str
        """Decrypt a previously encrypted Pk message.

        Returns the decrypted plaintext.
@ -408,14 +411,17 @@ class PkSigning(object):

        self._check_error(ret)

-        self.public_key = ffi.unpack(pubkey_buffer, pubkey_length).decode()
+        self.public_key = bytes_to_native_str(
+            ffi.unpack(pubkey_buffer, pubkey_length)
+        )

    def _check_error(self, ret):
        # type: (int) -> None
        if ret != lib.olm_error():
            return

-        last_error = ffi.string(lib.olm_pk_signing_last_error(self._pk_signing)).decode()
+        last_error = bytes_to_native_str(
+            ffi.string(lib.olm_pk_signing_last_error(self._pk_signing)))

        raise PkSigningError(last_error)

@ -450,4 +456,6 @@ class PkSigning(object):
            signature_buffer, signature_length)
        self._check_error(ret)

-        return ffi.unpack(signature_buffer, signature_length).decode()
+        return bytes_to_native_str(
+            ffi.unpack(signature_buffer, signature_length)
+        )
--- a/python/olm/py.typed
+++ b/python/olm/py.typed
--- a/python/olm/sas.py
+++ b/python/olm/sas.py
@ -34,6 +34,8 @@ from builtins import bytes
 from functools import wraps
 from typing import Optional

+from future.utils import bytes_to_native_str
+
 from _libolm import ffi, lib

 from ._compat import URANDOM, to_bytearray, to_bytes
@ -90,7 +92,8 @@ class Sas(object):
        if ret != lib.olm_error():
            return

-        last_error = ffi.string((lib.olm_sas_last_error(self._sas))).decode()
+        last_error = bytes_to_native_str(
+            ffi.string((lib.olm_sas_last_error(self._sas))))

        raise OlmSasError(last_error)

@ -112,7 +115,7 @@ class Sas(object):
            lib.olm_sas_get_pubkey(self._sas, pubkey_buffer, pubkey_length)
        )

-        return ffi.unpack(pubkey_buffer, pubkey_length).decode()
+        return bytes_to_native_str(ffi.unpack(pubkey_buffer, pubkey_length))

    @property
    def other_key_set(self):
@ -205,41 +208,7 @@ class Sas(object):
                mac_length
            )
        )
-        return ffi.unpack(mac_buffer, mac_length).decode()
-
-    def calculate_mac_fixed_base64(self, message, extra_info):
-        # type: (str, str) -> str
-        """Generate a message authentication code based on the shared secret.
-
-        This function uses a fixed base64 encoding that is compatible with
-        other base64 implementations.
-
-        Args:
-            message (str): The message to produce the authentication code for.
-            extra_info (str): Extra information to mix in when generating the
-                MAC
-
-        Raises OlmSasError on failure.
-
-        """
-        byte_message = to_bytes(message)
-        byte_info = to_bytes(extra_info)
-
-        mac_length = lib.olm_sas_mac_length(self._sas)
-        mac_buffer = ffi.new("char[]", mac_length)
-
-        self._check_error(
-            lib.olm_sas_calculate_mac_fixed_base64(
-                self._sas,
-                ffi.from_buffer(byte_message),
-                len(byte_message),
-                ffi.from_buffer(byte_info),
-                len(byte_info),
-                mac_buffer,
-                mac_length
-            )
-        )
-        return ffi.unpack(mac_buffer, mac_length).decode()
+        return bytes_to_native_str(ffi.unpack(mac_buffer, mac_length))

    def calculate_mac_long_kdf(self, message, extra_info):
        # type: (str, str) -> str
@ -273,4 +242,4 @@ class Sas(object):
                mac_length
            )
        )
-        return ffi.unpack(mac_buffer, mac_length).decode()
+        return bytes_to_native_str(ffi.unpack(mac_buffer, mac_length))
--- a/python/olm/session.py
+++ b/python/olm/session.py
@ -35,6 +35,8 @@ Examples:
 from builtins import bytes, super
 from typing import AnyStr, Optional, Type

+from future.utils import bytes_to_native_str
+
 # pylint: disable=no-name-in-module
 from _libolm import ffi, lib  # type: ignore

@ -144,7 +146,8 @@ class Session(object):
        if ret != lib.olm_error():
            return

-        last_error = ffi.string(lib.olm_session_last_error(self._session)).decode()
+        last_error = bytes_to_native_str(
+            ffi.string(lib.olm_session_last_error(self._session)))

        raise OlmSessionError(last_error)

@ -257,16 +260,16 @@ class Session(object):

        if message_type == lib.OLM_MESSAGE_TYPE_PRE_KEY:
            return OlmPreKeyMessage(
-                ffi.unpack(
+                bytes_to_native_str(ffi.unpack(
                    ciphertext_buffer,
                    ciphertext_length
-                ).decode())
+                )))
        elif message_type == lib.OLM_MESSAGE_TYPE_MESSAGE:
            return OlmMessage(
-                ffi.unpack(
+                bytes_to_native_str(ffi.unpack(
                    ciphertext_buffer,
                    ciphertext_length
-                ).decode())
+                )))
        else:  # pragma: no cover
            raise ValueError("Unknown message type")

@ -337,7 +340,7 @@ class Session(object):
        self._check_error(
            lib.olm_session_id(self._session, id_buffer, id_length)
        )
-        return ffi.unpack(id_buffer, id_length).decode()
+        return bytes_to_native_str(ffi.unpack(id_buffer, id_length))

    def matches(self, message, identity_key=None):
        # type: (OlmPreKeyMessage, Optional[AnyStr]) -> bool
@ -404,7 +407,7 @@ class Session(object):
        lib.olm_session_describe(
            self._session, describe_buffer, buffer_length
        )
-        return ffi.string(describe_buffer).decode()
+        return bytes_to_native_str(ffi.string(describe_buffer))


 class InboundSession(Session):
--- a/python/olm/utility.py
+++ b/python/olm/utility.py
@ -33,6 +33,8 @@ Examples:
 # pylint: disable=redefined-builtin,unused-import
 from typing import AnyStr, Type

+from future.utils import bytes_to_native_str
+
 # pylint: disable=no-name-in-module
 from _libolm import ffi, lib  # type: ignore

@ -121,7 +123,7 @@ class _Utility(object):

        cls._check_error(ret, OlmHashError)

-        return ffi.unpack(hash, hash_length).decode()
+        return bytes_to_native_str(ffi.unpack(hash, hash_length))


 def ed25519_verify(key, message, signature):
--- a/python/olm_build.py
+++ b/python/olm_build.py
@ -15,6 +15,8 @@
 # CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+from __future__ import unicode_literals
+
 import os
 import subprocess

@ -26,6 +28,7 @@ PATH = os.path.dirname(__file__)
 DEVELOP = os.environ.get("DEVELOP")

 compile_args = ["-I../include"]
+link_args = ["-L../build"]

 if DEVELOP and DEVELOP.lower() in ["yes", "true", "1"]:
    link_args.append('-Wl,-rpath=../build')
@ -43,10 +46,8 @@ ffibuilder.set_source(
        #include <olm/sas.h>
    """,
    libraries=["olm"],
-    library_dirs=[os.path.join("..", "build")],
    extra_compile_args=compile_args,
-    source_extension=".cpp", # we need to link the C++ standard library, so use a C++ extension
-)
+    extra_link_args=link_args)

 with open(os.path.join(PATH, "include/olm/error.h")) as f:
    ffibuilder.cdef(f.read(), override=True)
--- a/python/packaging.diff
+++ b/python/packaging.diff
@ -1,56 +0,0 @@
--- a/MANIFEST.in
-+++ b/MANIFEST.in
-@@ -1,3 +1,8 @@
- include include/olm/*.h
-include Makefile
- include olm_build.py
-+include libolm/*
-+include libolm/cmake/*
-+include libolm/include/olm/*
-+recursive-include libolm/lib *
-+include libolm/src/*
-+recursive-include libolm/tests *
--- a/olm_build.py
-+++ b/olm_build.py
-@@ -25,12 +25,29 @@
- 
- DEVELOP = os.environ.get("DEVELOP")
- 
-compile_args = ["-I../include"]
-+compile_args = ["-Ilibolm/include"]
- 
- if DEVELOP and DEVELOP.lower() in ["yes", "true", "1"]:
-     link_args.append('-Wl,-rpath=../build')
- 
-headers_build = subprocess.Popen("make headers", shell=True)
-headers_build.wait()
-+# Try to build with cmake first, fall back to GNU make
-+try:
-+    subprocess.run(
-+        ["cmake", ".", "-Bbuild", "-DBUILD_SHARED_LIBS=NO"],
-+        cwd="libolm", check=True,
-+    )
-+    subprocess.run(
-+        ["cmake", "--build", "build"],
-+        cwd="libolm", check=True,
-+    )
-+except FileNotFoundError:
-+    try:
-+        # try "gmake" first because some systems have a non-GNU make
-+        # installed as "make"
-+        subprocess.run(["gmake", "static"], cwd="libolm", check=True)
-+    except FileNotFoundError:
-+        # some systems have GNU make installed without the leading "g"
-+        # so give that a try (though this may fail if it isn't GNU make)
-+        subprocess.run(["make", "static"], cwd="libolm", check=True)
- 
- ffibuilder.set_source(
-@@ -43,7 +60,7 @@
-         #include <olm/sas.h>
-     """,
-     libraries=["olm"],
-    library_dirs=[os.path.join("..", "build")],
-+    library_dirs=[os.path.join("libolm", "build")],
-     extra_compile_args=compile_args,
-     source_extension=".cpp", # we need to link the C++ standard library, so use a C++ extension
- )
--- a/python/pyproject.toml
+++ b/python/pyproject.toml
@ -1,22 +0,0 @@
-[build-system]
-requires = ["setuptools", "cffi>=1.0.0"]
-build-backend = "setuptools.build_meta"
-
-[project]
-name = "python-olm"
-version = "3.2.16"
-description = "python CFFI bindings for the olm cryptographic ratchet library"
-authors = [{name = "Damir Jelić", email = "poljar@termina.org.uk"}]
-license = {text = "Apache-2.0"}
-readme = "README.md"
-classifiers = [
-    "License :: OSI Approved :: Apache Software License",
-    "Topic :: Communications",
-]
-dependencies = ["cffi>=1.0.0"]
-
-[project.urls]
-homepage = "https://gitlab.matrix.org/matrix-org/olm/-/tree/master/python"
-
-[tool.setuptools]
-packages = [ "olm" ]
--- a/python/requirements.txt
+++ b/python/requirements.txt
@ -1,2 +1,3 @@
+future
 cffi
 typing
--- a/python/setup.cfg
+++ b/python/setup.cfg
@ -3,3 +3,6 @@ testpaths = tests
 flake8-ignore =
    olm/*.py F401
    tests/*.py W503
+
+[coverage:run]
+omit=olm/__version__.py
--- a/python/setup.py
+++ b/python/setup.py
@ -1,6 +1,31 @@
 # -*- coding: utf-8 -*-
+
+import os
+from codecs import open
+
 from setuptools import setup

+here = os.path.abspath(os.path.dirname(__file__))
+
+about = {}
+with open(os.path.join(here, "olm", "__version__.py"), "r", "utf-8") as f:
+    exec(f.read(), about)
+
 setup(
-    cffi_modules=["olm_build.py:ffibuilder"]
+    name=about["__title__"],
+    version=about["__version__"],
+    description=about["__description__"],
+    author=about["__author__"],
+    author_email=about["__author_email__"],
+    url=about["__url__"],
+    license=about["__license__"],
+    packages=["olm"],
+    setup_requires=["cffi>=1.0.0"],
+    cffi_modules=["olm_build.py:ffibuilder"],
+    install_requires=[
+        "cffi>=1.0.0",
+        "future",
+        "typing;python_version<'3.5'"
+    ],
+    zip_safe=False
 )
--- a/python/tests/utils_test.py
+++ b/python/tests/utils_test.py
@ -1,6 +1,8 @@
 import base64
 import hashlib

+from future.utils import bytes_to_native_str
+
 from olm import sha256
 from olm._compat import to_bytes

@ -17,7 +19,7 @@ class TestClass(object):
            hashlib.sha256(to_bytes(input1)).digest()
        )

-        hashlib_hash = hashlib_hash[:-1].decode()
+        hashlib_hash = bytes_to_native_str(hashlib_hash[:-1])

        assert first_hash != second_hash
        assert hashlib_hash == first_hash
--- a/python/tox.ini
+++ b/python/tox.ini
@ -6,7 +6,7 @@ envlist = py27,py36,pypy,{py2,py3}-cov,coverage
 deps = -rrequirements.txt
       -rtest-requirements.txt

-passenv = TOXENV,CI,TRAVIS,TRAVIS_*
+passenv = TOXENV CI TRAVIS TRAVIS_*
 commands = pytest --benchmark-disable
 usedevelop = True

--- a/src/session.cpp
+++ b/src/session.cpp
@ -437,7 +437,7 @@ void olm::Session::describe(char *describe_buffer, size_t buflen) {

    size = snprintf(
        describe_buffer, remaining,
-        "sender chain index: %lu ", ratchet.sender_chain[0].chain_key.index
+        "sender chain index: %d ", ratchet.sender_chain[0].chain_key.index
    );
    CHECK_SIZE_AND_ADVANCE;

@ -447,7 +447,7 @@ void olm::Session::describe(char *describe_buffer, size_t buflen) {
    for (size_t i = 0; i < ratchet.receiver_chains.size(); ++i) {
        size = snprintf(
            describe_buffer, remaining,
-            " %lu", ratchet.receiver_chains[i].chain_key.index
+            " %d", ratchet.receiver_chains[i].chain_key.index
        );
        CHECK_SIZE_AND_ADVANCE;
    }
@ -458,7 +458,7 @@ void olm::Session::describe(char *describe_buffer, size_t buflen) {
    for (size_t i = 0; i < ratchet.skipped_message_keys.size(); ++i) {
        size = snprintf(
            describe_buffer, remaining,
-            " %lu", ratchet.skipped_message_keys[i].message_key.index
+            " %d", ratchet.skipped_message_keys[i].message_key.index
        );
        CHECK_SIZE_AND_ADVANCE;
    }
--- a/tests/include/doctest.h
+++ b/tests/include/doctest.h
@ -4498,7 +4498,7 @@ namespace {
            sigaltstack(&sigStack, &oldSigStack);
            struct sigaction sa = {};
            sa.sa_handler       = handleSignal; // NOLINT
-            sa.sa_flags         = SS_ONSTACK;
+            sa.sa_flags         = SA_ONSTACK;
            for(std::size_t i = 0; i < DOCTEST_COUNTOF(signalDefs); ++i) {
                sigaction(signalDefs[i].id, &sa, &oldSigActions[i]);
            }
--- a/xcode/OLMKit/OLMAccount.h
+++ b/xcode/OLMKit/OLMAccount.h
@ -35,27 +35,14 @@
 /** Public parts of the unpublished one time keys for the account */
 - (NSDictionary*) oneTimeKeys;

-/**
- * Deprecated use unPublishedFallbackKey
- */
+/** Public part of the unpublished fallback key for the account */
 - (NSDictionary*) fallbackKey;

-/**
- Public part of the unpublished fallback key for the account, if present and unublished.
- */
- (NSDictionary*) unpublishedFallbackKey;
-
 - (BOOL) removeOneTimeKeysForSession:(OLMSession*)session;

 /** Marks the current set of one time keys as being published. */
 - (void) markOneTimeKeysAsPublished;

-/** Forget about the old fallback key.
- * This should be called once you are reasonably certain that you will not
- * receive any more messages that use the old fallback key
- */
- (void) forgetFallbackKey;
-
 /** The largest number of one time keys this account can store. */
 - (NSUInteger) maxOneTimeKeys;

--- a/xcode/OLMKit/OLMAccount.m
+++ b/xcode/OLMKit/OLMAccount.m
@ -179,33 +179,6 @@
    return keyDictionary;
 }

- (NSDictionary *) unpublishedFallbackKey {
-    size_t fallbackKeyLength = olm_account_unpublished_fallback_key_length(_account);
-    uint8_t *fallbackKeyBytes = malloc(fallbackKeyLength);
-    if (!fallbackKeyBytes) {
-        return nil;
-    }
-    
-    size_t result = olm_account_unpublished_fallback_key(_account, fallbackKeyBytes, fallbackKeyLength);
-    if (result == olm_error()) {
-        const char *error = olm_account_last_error(_account);
-        NSLog(@"error getting unpublished fallback key: %s", error);
-        free(fallbackKeyBytes);
-        return nil;
-    }
-    NSData *fallbackKeyData = [NSData dataWithBytesNoCopy:fallbackKeyBytes length:fallbackKeyLength freeWhenDone:YES];
-    NSError *error = nil;
-    NSDictionary *keyDictionary = [NSJSONSerialization JSONObjectWithData:fallbackKeyData options:0 error:&error];
-    if (error) {
-        NSLog(@"Could not decode JSON for unpublished fallback: %@", error.localizedDescription);
-    }
-    return keyDictionary;
-}
-
- (void) forgetFallbackKey {
-    olm_account_forget_old_fallback_key(self.account);
-}
-
 - (void) generateFallbackKey {
    size_t randomLength = olm_account_generate_fallback_key_random_length(_account);
    NSMutableData *random = [OLMUtility randomBytesOfLength:randomLength];
--- a/xcode/OLMKit/OLMSAS.h
+++ b/xcode/OLMKit/OLMSAS.h
@ -54,17 +54,6 @@ NS_ASSUME_NONNULL_BEGIN
 */
 - (NSString *)calculateMac:(NSString*)input info:(NSString*)info error:(NSError* _Nullable *)error;

-/**
- Generate a message authentication code (MAC) based on the shared secret.
- This version is compatible with other base64 implementations.
-
- @param input the message to produce the authentication code for.
- @param info extra information to mix in when generating the MAC, as per the Matrix spec.
- @param error the error if any.
- @return the MAC.
- */
- (NSString *)calculateMacFixedBase64:(NSString*)input info:(NSString*)info error:(NSError* _Nullable *)error;
-
 /**
 Generate a message authentication code (MAC) based on the shared secret.
 For compatibility with an old version of olm.js.
--- a/xcode/OLMKit/OLMSAS.m
+++ b/xcode/OLMKit/OLMSAS.m
@ -137,40 +137,6 @@
    return mac;
 }

- (NSString *)calculateMacFixedBase64:(NSString *)input info:(NSString *)info error:(NSError *__autoreleasing  _Nullable *)error {
-    NSMutableData *inputData = [input dataUsingEncoding:NSUTF8StringEncoding].mutableCopy;
-    NSData *infoData = [info dataUsingEncoding:NSUTF8StringEncoding];
-
-    size_t macLength = olm_sas_mac_length(olmSAS);
-    NSMutableData *macData = [NSMutableData dataWithLength:macLength];
-    if (!macData) {
-        return nil;
-    }
-
-    size_t result = olm_sas_calculate_mac_fixed_base64(olmSAS,
-                                                       inputData.mutableBytes, inputData.length,
-                                                       infoData.bytes, infoData.length,
-                                                       macData.mutableBytes, macLength);
-    if (result == olm_error()) {
-        const char *olm_error = olm_sas_last_error(olmSAS);
-        NSLog(@"[OLMSAS] calculateMac: olm_sas_calculate_mac error: %s", olm_error);
-
-        NSString *errorString = [NSString stringWithUTF8String:olm_error];
-        if (error && olm_error && errorString) {
-            *error = [NSError errorWithDomain:OLMErrorDomain
-                                         code:0
-                                     userInfo:@{
-                                                NSLocalizedDescriptionKey: errorString,
-                                                NSLocalizedFailureReasonErrorKey: [NSString stringWithFormat:@"olm_sas_calculate_mac error: %@", errorString]
-                                                }];
-        }
-        return nil;
-    }
-
-    NSString *mac = [[NSString alloc] initWithData:macData encoding:NSUTF8StringEncoding];
-    return mac;
-}
-
 - (NSString *)calculateMacLongKdf:(NSString *)input info:(NSString *)info error:(NSError *__autoreleasing  _Nullable *)error {
    NSMutableData *inputData = [input dataUsingEncoding:NSUTF8StringEncoding].mutableCopy;
    NSData *infoData = [info dataUsingEncoding:NSUTF8StringEncoding];
--- a/xcode/OLMKitTests/OLMKitTests.m
+++ b/xcode/OLMKitTests/OLMKitTests.m
@ -36,27 +36,7 @@ limitations under the License.
    OLMAccount *bob = [[OLMAccount alloc] initNewAccount];
    [bob generateFallbackKey];
    
-    [self _testAliceAndBob:bob withBobKeys:bob.unpublishedFallbackKey];
-
-}
-
- (void)testMarkAsPublishedFallbackKey {
-    OLMAccount *bob = [[OLMAccount alloc] initNewAccount];
-    [bob generateFallbackKey];
-    
-    
-    NSDictionary *unpublished = bob.unpublishedFallbackKey;
-    __block NSString *bobKeyValue = ((NSDictionary *) unpublished[@"curve25519"]).allValues.lastObject;
-    
-    XCTAssertNotNil(bobKeyValue);
-    
-    [bob markOneTimeKeysAsPublished];
-    
-    NSDictionary *unpublishedAfter = bob.unpublishedFallbackKey;
-    
-    __block NSString *bobKeyValueAfter = ((NSDictionary *) unpublishedAfter[@"curve25519"]).allValues.lastObject;
-    
-    XCTAssertNil(bobKeyValueAfter);
+    [self _testAliceAndBob:bob withBobKeys:bob.fallbackKey];
 }

 - (void)_testAliceAndBob:(OLMAccount *)bob withBobKeys:(NSDictionary *)bobKeys {
@ -109,7 +89,7 @@ limitations under the License.
    OLMAccount *bob = [[OLMAccount alloc] initNewAccount];
    [bob generateFallbackKey];
    
-    [self _testBackAndForthWithBob:bob andBobKeys:bob.unpublishedFallbackKey];
+    [self _testBackAndForthWithBob:bob andBobKeys:bob.fallbackKey];
 }

 - (void)_testBackAndForthWithBob:(OLMAccount *)bob andBobKeys:(NSDictionary *)bobKeys {
@ -160,7 +140,7 @@ limitations under the License.
    [bob generateFallbackKey];
    NSDictionary *bobIdKeys = bob.identityKeys;
    NSDictionary *bobOneTimeKeys = bob.oneTimeKeys;
-    NSDictionary *bobFallbackKey = bob.unpublishedFallbackKey;
+    NSDictionary *bobFallbackKey = bob.fallbackKey;
    
    NSError *error;
    NSData *bobData = [NSKeyedArchiver archivedDataWithRootObject:bob requiringSecureCoding:NO error:&error];
@ -171,7 +151,7 @@ limitations under the License.
    
    NSDictionary *bobIdKeys2 = bob2.identityKeys;
    NSDictionary *bobOneTimeKeys2 = bob2.oneTimeKeys;
-    NSDictionary *bobFallbackKey2 = bob2.unpublishedFallbackKey;
+    NSDictionary *bobFallbackKey2 = bob2.fallbackKey;
    
    XCTAssertEqualObjects(bobIdKeys, bobIdKeys2);
    XCTAssertEqualObjects(bobOneTimeKeys, bobOneTimeKeys2);
@ -189,7 +169,7 @@ limitations under the License.
    OLMAccount *bob = [[OLMAccount alloc] initNewAccount];
    [bob generateFallbackKey];
    
-    [self _testSessionSerializationWithBob:bob bobKeys:bob.unpublishedFallbackKey];
+    [self _testSessionSerializationWithBob:bob bobKeys:bob.fallbackKey];
 }

 - (void)_testSessionSerializationWithBob:(OLMAccount *)bob bobKeys:(NSDictionary *)bobKeys {