Hi, I want to sign binary data in OpenPGP Message Format. I want sign it by two or more keys. According to http://tools.ietf.org/html/rfc4880#section-5.4 it seems it is possible. (A one-octet number holding a flag showing whether the signature is nested. A zero value indicates that the next packet is another One-Pass Signature packet that describes another signature to be applied to the same message data.)
I'd like to use gpg from command-line to sign an input file by two keys. I tried to sign it by: gpg2.exe --quiet --yes --force-v3-sigs -z 0 -u "test1 (test1) < te...@test1.org>" -o %1.signed --sign %1 gpg2.exe --quiet --yes --force-v3-sigs -z 0 -u "test2 (test2) < te...@test2.org>" -o %1.signed2 --sign %1.signed But the second signature signed the first one also with the first signature. I need to sign it in way were I can verify signature of signed data by both keys (the last octet of One-Pass Signature Packets (Tag 4) packet should be equal to zero). Any help how to achieve from pgp command line is welcome. Thanks. Pavol Misik
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