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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 QNX Neutrino 7.1.
System Security Guide
The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
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.
QNX cryptography library reference
qcrypto_keys.h
QNX cryptography library key handling API.
qcrypto_key_is_private()
Check if a key is private

QNX Momentics IDE User's Guide
This User's Guide describes version 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics 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 QNX Neutrino 7.1.
- Quickstart Guide
- OS Components & Operations
- Audio & Graphics API
- Multimedia
- Networking Middleware
- Programming
- Sensor Framework
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
  - Security Matrix
    The following table describes security problems and cyberattacks and the QNX Neutrino 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.
    - Configuration file
      The qcrypto library configuration file allows the system integrator to define which cryptography providers are supported and available to the system.
    - Adding cryptographic primitives
      The libqcrypto_pluginS.a plugin library and qcrypto/qcrypto_plugin.h header file allow you to create a custom plugin to use with the qcrypto library.
    - Supported primitives
      The qcrypto library provides a consistent API to cryptographic primitives offered by third-party libraries.
    - QNX cryptography library reference
      - qcrypto.h
        QNX cryptography library API.
      - qcrypto_dyn.h
        QNX cryptography library dynamic API.
      - qcrypto_error.h
        QNX cryptography library error handling API.
      - qcrypto_keys.h
        QNX cryptography library key handling API.
        qcrypto_ec_curve_t
        Supported ECC curves
        qcrypto_ec_key_type_t
        EC key types
        qcrypto_key_args_t
        Public or private key arguments
        qcrypto_key_format_t
        Key encoding formats
        qcrypto_key_from_file()
        Load a symmetric key from a file
        qcrypto_key_from_mem()
        Load a symmetric key from memory
        qcrypto_key_generate()
        Generate a symmetric key
        qcrypto_key_is_private()
        Check if a key is private
        qcrypto_key_is_public()
        Check if a key is public
        qcrypto_key_is_symmetric()
        Check if a key is symmetric
        qcrypto_key_to_file()
        Save a symmetric key to a file
        qcrypto_key_to_mem()
        Save a symmetric key to memory
        qcrypto_keygen_request()
        Request a key from the QNX cryptography library
        qcrypto_keygen_supported()
        Query whether the specified key generation algorithm is supported
        qcrypto_keypair_generate()
        Generate a PKI key
        qcrypto_keypair_init()
        Initialize PKI key generation using the specified arguments
        qcrypto_keypair_init_from_file()
        Initialize PKI key generation using parameters in a file
        qcrypto_keypair_init_from_mem()
        Initialize PKI key generation using parameters in memory
        qcrypto_privkey_from_file()
        Load a private key from a file
        qcrypto_privkey_from_mem()
        Load a private key from memory
        qcrypto_privkey_to_file()
        Save a private key to a file
        qcrypto_privkey_to_mem()
        Save a private key to memory
        qcrypto_pubkey_from_file()
        Load a public key from a file
        qcrypto_pubkey_from_mem()
        Load a public key from memory
        qcrypto_pubkey_from_privkey()
        Extract a public key
        qcrypto_pubkey_to_file()
        Save a public key to a file
        qcrypto_pubkey_to_mem()
        Save a public key to memory
        qcrypto_release_key()
        Release a key
      - qcrypto_plugin.h
        QNX cryptography library plugin API.
  - The devcrypto service
    The devcrypto service is a legacy system driver interface and is mainly provided for backwards compatibility.
  - 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
QNX Hypervisor
The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
QNX Advanced Virtualization Frameworks User's Guide
This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

qcrypto_key_is_private()

Check if a key is private

Synopsis:

#include <qcrypto/qcrypto_keys.h>

int qcrypto_key_is_private(qcrypto_key_t *key)

Arguments:

key: The key handle.

Library:

libqcrypto

Returns:

1 if the key is private or 0 otherwise.

Page updated: March 12, 2026