I try different permutation since 3 weeks now, any help will be so much appreciated. I think the problem is from the signature returned by my external tool but there is no much documentation on how to use and what signature is expected. Signtool sign /di "C:\scratch\dir" notepad.exe Encode the signature in base64 (I have tried also without encoding).Sign the hash with an external tool (RSA 1.5 - 4096 - SHA256).Information from the official ISO download page: If you would like to verify the data integrity and authenticity of your download, you can follow these steps: Download the desired product ISO file and follow the installation guidelines. Example: type in certutil hashfile Dekisoft.txt MD5 to get MD5 hash for Dekisoft.txt file. Tip: Use the tab key for windows to complete the name of the file. Tip: to insert path drag and drop the folder from windows explorer. Decode the base64 hash (I have tried also without decoding) Wind/ 20-04 / 20H1 ISO image SHA-256 Checksums. Command: type in cd followed by folder path.Signtool sign /dg "C:\scratch\dir" /fd SHA256 /f public-cert.cer notepad.exe This tutorial will show you how to add or remove Hash to the context menu of all files for all users in Windows 8 and Windows 10. Compute the hash and add the public cert: The Hash context menu allows you to quickly see the SHA1, SHA256, SHA384, SHA512, MACTripleDES, MD5, and RIPEMD160 hash value (checksum) of files.I have followed v on Custom Keys with Authenticode Signing Allows simple calculation of CRC checksums. There is no error message, but when I check the properties of the file there is the message "no signature was present in the subject", the cert is present but not the signature it seems. Calculate file and directory hashes with MD5, SHA1, SHA256, SHA384 and SHA512 protocols. Unfortunately the option /di to inject the sign hash doesn't work. Another method is to use Windows PowerShell (version 5. You may use other values after SHA, such as 1 or 256, to produce the corresponding hash, and you may substitute MD5 or other supported parameters. I try to use signtool to sign the hash of an executable file with an external tool. This command returns the SHA512 hash of file abc.exe located at the specified file path.
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