Hashcat 的 oclHashcat 是一个用来破解哈希值的工具，支持 MD5 和 SHA1。
oclHashcat 是世界上最快，最先进的，基于 GPGPU 的密码恢复工具，支持 5 种独特攻击模式，超过 170 个高优化哈希算法。oclHashcat 当前支持 AMD (OpenCL) 和 Nvidia (CUDA) 图形处理器，支持 GNU/Linux 和 Windows 7/8/10 平台。
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
