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Verifying Your Downloaded File
Technical Note 1988
Last Reviewed 23-Jan-2009
Applies To
All Attachmate Products
Summary
Technical Note 1988
Last Reviewed 23-Jan-2009
Applies To
All Attachmate Products
Summary
Attachmate product files are provided with a digital signature or secure hash. This technical note describes how to verify a downloaded file is from the original publisher, complete, and unaltered.
Windows Executable Files
The digital signature of a Windows executable file (a file with an .exe extension) can be verified either during the download process or after the file has been downloaded.
During the Download Process
Follow these steps to verify the signature of an .exe file within the Microsoft Internet Explorer web browser:
- When downloading the file, click Run.
- When the download is complete, click the Publisher's name, "Attachmate Corporation."
- If the digital signature is correct, at the top of the General tab, you will see "Digital Signature Information: This digital signature is OK."
After Downloading
Follow these steps to verify the signature of a downloaded .exe file in Windows Explorer:
- Right-click the downloaded .exe file and click Properties.
- Click the Digital Signatures tab.
Note: The Digital Signatures tab may not display for any of the following reasons:
- You are using Windows XP and the file is larger than 300 MB. For more information about this issue and using alternative .NET Framework SDK utilities, see http://support.microsoft.com/kb/922225. As a workaround, verify the signature using Windows Server 2003 or Windows Vista instead (or, on Windows XP, verify the signature During the Download Process).
- The file has been corrupted or altered. Try re-downloading the file.
- The file is not digitally signed. If a hash value is displayed on the Attachmate download web site, instead use the verification process for UNIX Files.
- Select "Attachmate Corporation" or "WRQ" in the Signature list and click Details.
- After the file has been read, if the digital signature is correct, at the top of the General tab, you will see "Digital Signature Information: This digital signature is OK."
UNIX Files
Follow these steps to verify a secure hash value:
- Before you download the file, on the Attachmate download web site, note the SHA-1 hash (40 characters) or MD5 hash (32 characters) displayed above the license agreement check box.
- After downloading the file, run your UNIX sha1, sha1sum, md5, or hash command utility on the downloaded file to calculate its hash.
- Verify the hash values from steps 1 and 2 match exactly. You may want to copy and paste the hash values into a text editor for easy comparison.
If the values do not match, your download may be incomplete or corrupted; try downloading again. If the values still do not match, contact Attachmate Technical Support.
