VMware provides Cryptographic hashes on product download pages as a way for you to confirm the integrity of the files you download. The md5sum and sha1 hash algorithms take a file as input and produce as output a message digest of the input, which is a highly unique fingerprint.

The SHA hash functions are a set of cryptographic hash functions designed by the National Security Agency (NSA) and published by the NIST as a U.S. Federal Information Processing Standard. SHA stands for Secure Hash Algorithm.

VMware provides either a sha-1 hash, an MD5 message digest, or both for software downloads. This enables you to verify that your downloaded files are unaltered from the original.

To confirm file integrity, use an sha-1 and/or a MD5 utility on your computer to calculate your own hash for files downloaded from the VMware web site.

If your calculated hash matches the message digest we provide, you are assured that the file was downloaded intact.

sha-1 and MD5 utilities are available for Windows and Linux and Mac. Most Linux installations provide a sha1sum command for sha-1 hashes and a md5sum command for calculating MD5 message digests.

The File Checksum Integrity Verifier (FCIV) can be used on Windows based products to verify both MD5 and sha-1 values. Please see http://support.microsoft.com/kb/841290 for details on FCIV.

Mac OS X: How to Verify a SHA-1 Digest http://support.apple.com/kb/HT1652

Instructions on checking an MD5 checksum on a Mac:

  • In Finder, browse to /Applications/Utilities.
  • Double-click on the Terminal icon. A Terminal window will appear.
  • In the Terminal window, type: "openssl md5" (md5 followed by a space).
  • Drag the downloaded file from the Finder into the Terminal window.
  • Click in the Terminal window, press the Return key, and compare the checksum displayed to the screen to the one on VMware's download page.

Instructions on checking an sha-1 checksum on a Mac:

  • In Finder, browse to /Applications/Utilities.
  • Double-click on the Terminal icon. A Terminal window will appear.
  • In the Terminal window, type: "openssl sha1 " (sha1 followed by a space).
  • Drag the downloaded file from the Finder into the Terminal window.
  • Click in the Terminal window, press the Return key, and compare the checksum displayed to the screen to the one on VMware's download page.