How you can see from the below image from Gosign interface, somehow we made the timestamp on the signature rather than the file itself, therefore we cannot proceed with the requested task. Is there any way you can think of in order to extract this timestamp from the signature, and attach it to the .p7m file, in order to obtain a .TSD/.M7M file? I'm not finding a way to extract its .TSR and .TST, no matter which program I tried.
Dike Interface showing what I need
As alternative, I'm trying to backdate a self-signed certificate with OpenSSL, I ended up with a .TSR file but I don't know how to attach it to the .P7M witouth the Gosign premium plan, and also, it looks the .TSR file I generated does not include any valid timestamp and certificate. The .TSR was being generated like this: tsa.key -> tsa.csr -> tsa.crt + tsaroot.key -> tsaroot.crt = tsa.crt -> tsa.p12 -> file.key.pem + file.crt.pem Then, file.key.pem + file.crt.pem + file_hash.tsq = file.TSR
I can't use online third party timestamp services because it should be a backdate timestamp, Thanks for any help or indication
