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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
System Security Guide
The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX OS system and developers who want to create a QNX OS resource manager free from vulnerabilities.
The devcrypto service
The devcrypto service is a legacy system driver interface and is mainly provided for backwards compatibility.
The devcrypto plugin API (devcrypto_plugin.h)
The devcrypto plugin API allows you to create a software backend to the devcrypto service, which provides access to cryptographic accelerators.
devcrypto_algorithm_op_uninit
Uninitialize an algorithm

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
- Quickstart Guide
- System Architecture
  The System Architecture guide accompanies the QNX OS and is intended for both application developers and end-users.
- OS Components & Operations
- Graphics
- Programming
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX OS system and developers who want to create a QNX OS resource manager free from vulnerabilities.
  - Security Matrix
    The following table describes security problems and cyberattacks and the QNX OS security features that can mitigate them.
  - Security Features Overview
  - Security Features for Developers
  - Security Features for System Integrators
  - Security Policies
  - Fortified System Functions
  - QNX Cryptography Library
    The QNX cryptography library (qcrypto library) is a generic cryptographic shim layer that provides a consistent API to the various cryptographic primitives offered by third-party libraries.
  - The devcrypto service
    The devcrypto service is a legacy system driver interface and is mainly provided for backwards compatibility.
    - The devcrypto plugin API (devcrypto_plugin.h)
      The devcrypto plugin API allows you to create a software backend to the devcrypto service, which provides access to cryptographic accelerators.
      - Definitions in devcrypto_plugin.h
        Preprocessor macro definitions for the devcrypto_plugin.h header file in the devcr library
      - devcrypto_aead_cipher_op_decrypt
        Decrypt data using the specified AEAD cipher algorithm state
      - devcrypto_aead_cipher_op_encrypt
        Encrypt data using the specified AEAD cipher algorithm state
      - devcrypto_aead_cipher_op_init
        Initialize an AEAD cipher algorithm state
      - devcrypto_aead_cipher_ops_t
        AEAD cipher algorithm functions
      - devcrypto_aead_cipher_params_t
        AEAD cipher algorithm parameters
      - devcrypto_aead_cipher_t
        AEAD cipher algorithm object
      - devcrypto_algorithm_op_init
        Initialize an algorithm
      - devcrypto_algorithm_op_uninit
        Uninitialize an algorithm
      - devcrypto_algorithm_t
        Algorithm object
      - devcrypto_algorithm_type_t
        Algorithm types
      - devcrypto_cipher_op_decrypt
        Decrypt data using the specified cipher algorithm state
      - devcrypto_cipher_op_encrypt
        Encrypt data using the specified cipher algorithm state
      - devcrypto_cipher_op_init
        Initialize a cipher algorithm state
      - devcrypto_cipher_ops_t
        Cipher algorithm functions
      - devcrypto_cipher_params_t
        Cipher algorithm parameters
      - devcrypto_cipher_t
        Cipher algorithm object
      - devcrypto_digest_op_copy
        Copy a digest algorithm state
      - devcrypto_digest_op_final
        Finalize a digest algorithm state
      - devcrypto_digest_op_init
        Initialize a digest algorithm state
      - devcrypto_digest_op_update
        Update a digest algorithm state
      - devcrypto_digest_ops_t
        Digest algorithm functions
      - devcrypto_digest_params_t
        Digest algorithm parameters
      - devcrypto_digest_t
        Digest algorithm object
      - devcrypto_mac_op_final
        Finalize a MAC algorithm state
      - devcrypto_mac_op_init
        Initialize a MAC algorithm state
      - devcrypto_mac_op_update
        Update a MAC algorithm state
      - devcrypto_mac_ops_t
        MAC algorithm functions
      - devcrypto_mac_params_t
        MAC algorithm parameters
      - devcrypto_mac_t
        MAC algorithm object
      - devcrypto_plugin_op_init
        Initialize a plugin
      - devcrypto_plugin_op_uninit
        Uninitialize a plugin
      - devcrypto_plugin_ops_t
        Plugin global functions
      - devcrypto_plugin_register_algorithm()
        Register an algorithm
      - devcrypto_state_ctx_t
        Algorithm state context
    - Example devcrypto plugin: openssl_digest.c
      This example illustrates how to implement a devcrypto plugin.
    - The devcrypto I/O command API (cryptodev.h)
      The devcrypto API that provides I/O command structures.
  - Pathtrust
    The pathtrust feature prevents processes from executing untrusted code. If a process is compromised, pathtrust mitigates the threat of the system being further compromised by an attacker using chained-together exploits.
  - PAM
    Systems that need authentication can use pluggable authentication module (PAM), a configurable standard library.
  - Using mkqnximage to Display Security Features
- Utilities & Libraries
- Migrating to QNX OS 8.0
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX OS in the Amazon cloud environment.
QNX Toolkit for Visual Studio Code
This User's Guide describes the QNX^® Toolkit for Visual Studio Code. The guide introduces you to the QNX Toolkit by explaining the QNX development environment and how to build, run, and debug your QNX^® Operating System (OS) applications and systems.
QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

devcrypto_algorithm_op_uninit

QNX SDP8.0QNX OS System Security GuideAPIConfiguration

Uninitialize an algorithm

Synopsis:

#include <dev/crypto/devcrypto_plugin.h>

typedef void(* devcrypto_algorithm_op_uninit)(devcrypto_state_ctx_t *sctx);

Arguments:

sctx: The state context.

Library:

devcr

Description:

This function signals that the user has released the algorithm object and the plugin can clean up the resources associated with it.

Page updated: March 05, 2025