What file checksum tools are available for OpenVMS?
The undocumented (prior to V8.2) DCL command CHECKSUM is the usual means, and provides a rather simple-minded checksum suitable to detect basic file corruptions. Starting with V8.2, additional algorithms beyond the classic XOR scheme are available. One of the most common schemes beyond the CHECKSUM XOR scheme is MD5, and information and a source code example are available via the MD5 RFC. As of this writing, pre-built versions of MD5 are expected to be made available at or via the OpenVMS Freeware website ( http://www.hp.com/go/openvms/freeware/ ), and MD5 is expected to be made available on an OpenVMS Freeware release after V7.0. Also see the CHECKSUM/ALGORITHM=MD5 command on OpenVMS V8.2 and later.
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