Verify a signed file with openssl console

zvivered · 08-24-2019, 05:43 AM

Hello,

I have a binary file signed offline by another system.
The file is copied as it to my system.
Now I have to verify that it is signed.
How can I do it using: openssl verify ...

Thank you,
Zvika

zvivered · 08-24-2019, 06:03 AM

Hello,

I found the following procedure:

Sign file
openssl rsautl -sign -in helloworld.txt -inkey key.pem -out siged.bin

Reconstruct original file
openssl rsautl -verify -in signed.bin -inkey key.pem > unsigned.txt

Thank you,
Zvika