Browse free open source C Libraries and projects below. Use the toggles on the left to filter open source C Libraries by OS, license, language, programming language, and project status.

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  • 1
    *NOTE* Migrated to http://github.com/cracklib/cracklib Next generation version of libCrack password checking library. As of Oct 2008 (reflected in 2.8.15 code release), licensed under LGPL.
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    Downloads: 2,440 This Week
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  • 2
    Open source DKIM library, MTA filter implementation and associated tools.
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    Downloads: 302 This Week
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  • 3

    libpwmd

    API for Password Manager Daemon (pwmd)

    Libpwmd provides an API for connecting to pwmd. It allows for your application to easily store and retrieve data from a pwmd server. It does all the work of setting up the socket and socket IO. Fetching element content can be done in as little as 4 function calls: pwmd_new(), pwmd_connect(), pwmd_open() and pwmd_command().
    Downloads: 60 This Week
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  • 4

    Seccomp Library

    High level interface to the Linux Kernel's seccomp filter

    NOTE: the libseccomp project has moved to https://github.com/seccomp/libseccomp The libseccomp library provides an easy to use, platform independent, interface to the Linux Kernel's syscall filtering mechanism: seccomp. The libseccomp API is designed to abstract away the underlying BPF based syscall filter language and present a more conventional function-call based filtering interface that should be familiar to, and easily adopted by application developers.
    Downloads: 6 This Week
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  • 5
    BBSGen is an improved Blum-Blum-Shub pseudorandom number generator. It consists of a C library (libbbsgen) and command-line tool (bbsgen). BBSGen can be used in applications and command-line as secure, unpredictable and strong PRNG.
    Downloads: 0 This Week
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  • 6
    The subject of this project is development of the Intrusion Detection System (IDS) with Artificial Neural Network (ANN). This model will allow the implementation of a system capable to analyze and to identify possible intrusions, based on the method of an
    Downloads: 0 This Week
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  • 7
    Clam AntiVirus Client Library provides a simple API to the ClamAV daemon. ClamAVC does not require ClamAV to be installed. ClamAVC communicates with clamd using clamd's documented protocol using either TCP or a local Unix domain socket.
    Downloads: 0 This Week
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  • 8
    Dunst

    Dunst

    Lightweight and customizable notification daemon

    Dunst is a lightweight replacement for the notification daemons provided by most desktop environments. It’s very customizable, isn’t dependent on any toolkits, and therefore fits into those window manager-centric setups we all love to customize to perfection. Customize fonts, icons, timeouts, and more. Are you unhappy with the default shortcuts and colors? No worries, you can change these all with a simple configuration file tweak. Change the look or behavior of notifications matching a specified pattern. You could use this to change the color of message notifications from your favorite jabber buddies, or to prevent important work email notifications from disappearing until you manually dismiss them. Specify the monitor that notifications should display on, or have them appear on the monitor with keyboard or mouse focus. Catch an unread notification disappearing from the corner of your eye? Just tap a keyboard shortcut to replay the last notification.
    Downloads: 0 This Week
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  • 9
    EaseFilterCPPExample

    EaseFilterCPPExample

    EaseFilter SDK CPP Example

    A C++ file security filter driver example implemented with EaseFilter File Security Filter Driver SDK. EaseFilter Comprehensive File Security SDK is a set of file system filter driver software development kit which includes file monitor filter driver, file access control filter driver, transparent file encryption filter driver, process filter driver and registry filter driver. In a single solution, EaseFilter Comprehensive File Security SDK encompasses file security, digital rights management, encryption, file monitoring, file auditing, file tracking, data loss prevention, process monitoring and protection, and system configuration protection. EaseFilter file system filter driver is a kernel-mode component that runs as part of the Windows executive above the file system. The EaseFilter file system filter driver can intercept requests targeted at a file system or another file system filter driver.
    Downloads: 0 This Week
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  • 10
    FolderLockerExample

    FolderLockerExample

    EaseFilter Folder Locker Example

    EaseFilter Folder Locker is a Windows file and folder protection solution built on the EaseFilter File Control, Encryption and Process Filter Driver SDK. It lets you lock, hide, and restrict access to files and folders in real time to prevent unauthorized access or modification. With the folder locker you can prevent your protected files being read,written,deleted, renamed, copied out of the protected folder, allow you to authorize or deny the file access to specific user or process, also allow you to hide the files or automatically encrypt/decrypt the files
    Downloads: 0 This Week
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  • 11

    Kevux Firewall

    Provide basic firewall program for Kevux using FLL.

    The Kevux Firewall program is one of the oldest Featureless Linux Library (FLL) programs. This project now exists outside of the FLL as its own distinct project and repository.
    Downloads: 0 This Week
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  • 12
    LibHideIP - An IP-hiding library

    LibHideIP - An IP-hiding library

    A library for hiding the local IP address from applications.

    LibHideIP is a library that on-the-fly (by preloading) prevents programs from knowing your IP address. This makes them unable to know and reveal your location, thus helping keep the user's privacy. There is NO NEED to rebuild your software, because LibHideIP is a pre-loadable library, meaning you just need to RUN the software with LibHideIP loaded. LibHideIP is also a development library. See the project homepage https://libhideip.sourceforge.io and the project Wiki in the menu above.
    Downloads: 0 This Week
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  • 13
    LibNetBlock - A Network Blocking Library

    LibNetBlock - A Network Blocking Library

    A library for blocking access to network on-the-fly

    LibNetBlock is a library that on-the-fly (by preloading) prevents a program under its control to use the network, to help to keep the user's privacy, prevent data leakage and virus spreading. You can think of LibNetBlock as a simple layer-7 (L7) firewall that simply blocks the network access for the program it controls. There is NO NEED to rebuild your software, because LibNetBlock is a pre-loadable library, meaning you just need to RUN the software with LibNetBlock loaded. LibNetBlock is also a development library. See the project homepage https://libnetblock.sourceforge.io and the project Wiki in the menu above.
    Downloads: 0 This Week
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  • 14
    LibSecRm - Secure Removal Library

    LibSecRm - Secure Removal Library

    A library for secure deleting data on-the-fly

    LibSecRm (LIBrary for SECure ReMoval) is a set of replacements for these standard C functions which cause data removing from files. The data is first securely wiped on-the-fly, to protect the user's privacy, then the original functions are called. There is NO NEED to rebuild your software, because LibSecRm is a pre-loadable library, meaning you just need to RUN the software with LibSecRm loaded. LibSecRm is also a development library. The following wiping methods are supported: Gutmann-like, random, Schneier, DoD. See the project homepage https://libsecrm.sourceforge.io and the project Wiki in the menu above. To wipe data that was left on the drive by using "normal" delete operations, you can take a look at WipeFreeSpace (https://wipefreespace.sourceforge.io), which wipes the space used by files marked as deleted (and other things, too).
    Downloads: 0 This Week
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  • 15
    OnAccessFileEncryption

    OnAccessFileEncryption

    EaseFilter OnAcess File Encryption SDK

    Transparent file encryption performs real-time I/O encryption and decryption of the files in any block data with 16 bytes. The encryption uses a 256 bits symmetric key to encrypt or decrypt the data with AES encryption algorithm. Auto file encryption protects data "at rest", meaning the transparent data and files encryption. It provides the ability to comply with policies which can be applied by users, processes and file type. This allows only authorized users and processes to access the encrypted files, unauthorized users and processes can’t access the encrypted files. The Auto FileCrypt Tool was developed with EaseFilter Encryption Filter Driver(EEFD) SDK, a file level encryption filter driver. Run the auto file encryption service with administrator permission, add the managed folders as encryption folder, when the files were added to the managed folder, the files will be encrypted automatically, when files were read, the data will be decrypted in memory automatically.
    Downloads: 0 This Week
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  • 16
    ActiveX OCX to encrypt files with a very fast implementation of AES 256 bits and standard RC4, for news and improvements visit http://rspencdll.sourceforge.net/
    Downloads: 0 This Week
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  • 17
    RegistryFilterExample

    RegistryFilterExample

    Registry Filter Driver SDK

    The EaseFilter Registry Filter Driver SDK is a powerful, kernel-mode development toolkit designed to help developers monitor, control, and protect Windows registry operations in real time. It enables the development of robust security, compliance, and system integrity solutions by intercepting and managing registry access before it reaches the Windows registry subsystem. The SDK allows your application to receive notifications before any registry operation is processed by the Windows Configuration Manager. By registering a RegistryCallback routine, your application can detect: Registry key creation, deletion, renaming Registry value changes Query operations
    Downloads: 0 This Week
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  • 18
    SSM Library

    SSM Library

    Safe Strings and Memory buffers library for C

    The problems of the unsafe C string functions such as the infamous strcpy() and strcat() are well-known, causing buffer overflows and leading to multiple security vulnerabilities. The SSM library is a safe and reliable alternative the old C string library.
    Downloads: 0 This Week
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  • 19
    SecureSandbox

    SecureSandbox

    EaseFilter Secure Sandbox Example

    EaseFilter Secure Sandbox was developed by a set of file system filter driver software development kit which includes file access control filter driver, transparent file encryption filter driver and process filter driver. The EaseFilter Secure Sandbox encompasses file security, file encryption, file monitoring, data loss prevention and process monitoring and protection. EaseFilter file system filter driver is a kernel-mode component that runs as part of the Windows executive above the file system. The EaseFilter file system filter driver can intercept requests targeted at a file system or another file system filter driver. By intercepting the request before it reaches its intended target, the filter driver can extend or replace functionality provided by the original target of the request. The EaseFilter file system filter driver can log, observe, modify, or even prevent the I/O operations for one or more file systems or file system volumes.
    Downloads: 0 This Week
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  • 20
    SecureShareExample

    SecureShareExample

    EaseFilter File Secure Sharing Example

    EaseFilter DRM Secure File Sharing example was implemented with the Transparent File Encryption and Control Filter Driver SDK. The shared file was encrypted with a unique 256-bits key, store the file access policies in a central server, share the encrypted files with fully control. You can grant, revoke or expire the file access at any time, even after the file has been shared. Digital Rights Management (DRM) enforces how files can be viewed, copied, printed, shared, or modified. Instead of granting blanket access, DRM attaches enforceable usage policies to content. With EaseFilter DRM, you can: Restrict access to authorized users, devices, and applications only. Block forwarding, uploading to unauthorized cloud services, or syncing to personal drives. Apply time-based access (expiration dates) and geo/device restrictions. Maintain tamper-evident audit trails for compliance and forensics.
    Downloads: 0 This Week
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  • 21
    A kind of encryption named "simple stream encrypt". The length of plaintext segment or the length of key is not limited, but must greater than zero. The lengths of every plaintext segment in a process don't require equivalency.
    Downloads: 0 This Week
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  • 22
    Libkpass is a from-scratch C implementation of reading and writing KeePass 1.x format password databases. Please check github for future updates.
    Downloads: 0 This Week
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  • 23
    mini-filter-driver-framework

    mini-filter-driver-framework

    A mini filter driver development framework for you

    EaseFilter File System Filter Driver Framework is a set of file system filter driver software development kit which includes file monitor filter driver, file access control filter driver, transparent file encryption filter driver, process filter driver and registry filter driver. The File Security Solution with the EaseFilter Comprehensive File Security SDK encompasses file security, digital rights management, encryption, file monitoring, file auditing, file tracking, data loss prevention, process monitoring and protection, and system configuration protection. EaseFilter file system filter driver is a kernel-mode component that runs as part of the Windows executive above the file system. The EaseFilter file system filter driver can intercept requests targeted at a file system or another file system filter driver. By intercepting the request before it reaches its intended target, the filter driver can extend or replace functionality provided by the original target of the request.
    Downloads: 0 This Week
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  • 24
    php-clamav
    PHP ClamAV - ClamAV Interface for PHP5 Scripts PHP-ClamAV is a PHP5 extension that allows to incorporate virus scanning features on your PHP5 scripts. It uses the Clam AV API for virus scanning.
    Downloads: 0 This Week
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