On Sun, 20 Jun 2021 18:22:53 +0000, ?????? ?????? via Gnupg-users wrote:- >12021/04/10 05:36.72 ?????, Matthew Richardson via Gnupg-users ><gnupg-users@gnupg.org> ??????: >> Is there any way in GnuPG to detach (or extract) a signature from a signed >> object? For example, a signed object is created with:- >> >> >gpg --armor --output signedfile.asc --sign inputfile.txt >> >> where what is wanted is a detached signature which would verify against >> inputfile.txt. >> >> This feature is in PGP 2:- >> >> >pgp -sa inputfile.txt -o signedfile.asc >> >pgp -b signedfile.asc -o verified.txt >> >> which also produces verified.pgp as the detached signature. The feature is >> described (briefly) in the PGP 2 documentation thus:- >> >> >To detach a signature certificate from a signed message: >> > pgp -b ciphertextfile >> >> The reason for asking is that I operate a service [1], which currently used >> PGP 2, and which would benefit from more recent crypto, but which also uses >> "pgp -b" extensively. >> >> Best wishes, >> Matthew >> [1] http://www.itconsult.co.uk/stamper.htm > >I believe you're looking for the -sb option, which creates a detached >signature.
Unless I have misunderstood (and please correct me if I have), "-sb" SIGNS producing a detached signature, whereas I am wanting to detach an EXISTING signature from an already signed object. Best wishes, Matthew _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
