Hashcat 的 oclHashcat 是一個用來破解哈希值的工具，支持 MD5 和 SHA1。

oclHashcat 是世界上最快，最先進的，基于 GPGPU 的密碼恢復工具，支持 5 種獨特攻擊模式，超過 170 個高優化哈希算法。oclHashcat 當前支持 AMD (OpenCL) 和 Nvidia (CUDA) 圖形處理器，支持? GNU/Linux 和 Windows 7/8/10 平臺。

特性：

• Worlds fastest md5crypt, phpass, mscash2 and WPA / WPA2 cracker
• Worlds first and only GPGPU based rule engine
• Free
• Multi-GPU (up to 128 gpus)
• Multi-Hash (up to 15 million hashes)
• Multi-OS (Linux & Windows native binaries)
• Multi-Platform (OpenCL & CUDA support)
• Multi-Algo (see below)
• Low resource utilization, you can still watch movies or play games while cracking
• Focuses highly iterated modern hashes
• Focuses single dictionary based attacks
• Supports mask attack
• Supports distributed cracking
• Supports pause / resume while cracking
• Supports reading words from file
• Supports reading words from stdin
• Supports hex-salt
• Supports hex-charset
• Integrated thermal watchdog
• 30+ Algorithms implemented with performance in mind