Re: Digital Signature Verification
On Fri, 8 Apr 2022 14:07, Vishal Rana said: > But my received signed image is some unreadable "--detach-sign" file . > How I am able to make a received signed image to * gcry_sexp_t *please > suggest*.* See gnupg/g10/parse-packet.c and gnupg/g10/pkglue.c and please do yourself a favor and start with a simpler project than implementing OpenPGP. Salam-Shalom, Werner -- The pioneers of a warless world are the youth that refuse military service. - A. Einstein signature.asc Description: PGP signature ___ Gnupg-users mailing list Gnupg-users@gnupg.org https://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Digital Signature Verification
Hi Team, Verify API in libgcrypt is expecting all arguments in * gcry_sexp_t *data type. gcry_error_t *gcry_pk_verify (**gcry_sexp_t* sig*, **gcry_sexp_t *data*, **gcry_sexp_t *pkey*) .* But my received signed image is some unreadable "--detach-sign" file . How I am able to make a received signed image to * gcry_sexp_t *please suggest*.* *Regards,* *Vishal Rana* Regards, Vishal Rana On Fri, Apr 8, 2022 at 1:05 PM Vishal Rana wrote: > Hi Team, > > Thank you Shalom, above suggestion is working. > But Digital signature verify is still not working. > > > I am signing image using *gnupg* from server side using "--detach-sign" > and getting *"image.sig*" file. > > Which I am trying to verify on another machine using libgcrypt. On the > verification side I am having "image.bin",image.sig, "PublicKey". > I am applying a hashing func on "image.bin" at the verification side to > get MsgDigest_of_RxMsg. > I am passing arguments to _gcry_pk_verify ( "Rx_image.sig", > MsgDigest_of_RxMsg , Public_key). > > Please suggest it to me if I am missing any step. Like any conversion or > decoding is required for "image.sig" before passing it to _gcry_pk_verify > (). > > > Regards, > Vishal Rana. > > > > > > > On Thu, Apr 7, 2022 at 7:44 PM Werner Koch wrote: > >> On Thu, 7 Apr 2022 15:26, Vishal Rana said: >> >> > Please suggest to me how to proceed. >> >> Most GnuPG tools feature a debug option >> >> --debug mpi >> --debug crypto >> >> which shows you lots of debug info. For example the raw RSA parameters. >> Use "--debug help" to see all debug classes. But always remember that >> these are debug options and the output is not a stable API in any way. >> >> >> Shalom-Salam, >> >>Werner >> >> >> -- >> The pioneers of a warless world are the youth that >> refuse military service. - A. Einstein >> > > > -- > > > > > *Thanks & Regards,Vishal RanaMobile :09422123401* > -- *Thanks & Regards,Vishal RanaMobile :09422123401* ___ Gnupg-users mailing list Gnupg-users@gnupg.org https://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Digital Signature Verification
Hi Team, Thank you Shalom, above suggestion is working. But Digital signature verify is still not working. > I am signing image using *gnupg* from server side using "--detach-sign" and getting *"image.sig*" file. > Which I am trying to verify on another machine using libgcrypt. On the verification side I am having "image.bin",image.sig, "PublicKey". I am applying a hashing func on "image.bin" at the verification side to get MsgDigest_of_RxMsg. I am passing arguments to _gcry_pk_verify ( "Rx_image.sig", MsgDigest_of_RxMsg , Public_key). Please suggest it to me if I am missing any step. Like any conversion or decoding is required for "image.sig" before passing it to _gcry_pk_verify (). Regards, Vishal Rana. On Thu, Apr 7, 2022 at 7:44 PM Werner Koch wrote: > On Thu, 7 Apr 2022 15:26, Vishal Rana said: > > > Please suggest to me how to proceed. > > Most GnuPG tools feature a debug option > > --debug mpi > --debug crypto > > which shows you lots of debug info. For example the raw RSA parameters. > Use "--debug help" to see all debug classes. But always remember that > these are debug options and the output is not a stable API in any way. > > > Shalom-Salam, > >Werner > > > -- > The pioneers of a warless world are the youth that > refuse military service. - A. Einstein > -- *Thanks & Regards,Vishal RanaMobile :09422123401* ___ Gnupg-users mailing list Gnupg-users@gnupg.org https://lists.gnupg.org/mailman/listinfo/gnupg-users
