behavior of gcrypt depending on input data: "conflicting use"

[Christof Schulze]

Hello Werner,

thank you very much, after replacing the line the code works.

Christof

Am Dienstag 20 Januar 2009 09:38:43 schrieb Werner Koch:
> Hi,
>
> Instead of:
>
>   error = gcry_mpi_scan (&mpival, GCRYMPI_FMT_USG,
>                          digest, hash_len, &nscanned );
>   assert ( error == 0 );
>   printf ( "nscanned: %lu\n", nscanned );
>
>   rc = gcry_sexp_build ( sign_parms, &errof,
>                          "(data (flags pkcs1) (hash %s %m))",
>                          HASH_NAME, mpival );
>   assert ( rc == 0 );
>   gcry_mpi_release ( mpival );
>
> you should better do:
>
>   rc = gcry_sexp_build (sign_parms, NULL,
>                         "(data (flags pkcs1)(hash %s %b))",
>                         HASH_NAME, (int)hash_len, digest);
>
>
> I have not looked at the actual problem with %m.  If you want to figure
> that out, you need to check the MPI and the resulting S-expression, for
> example by inserting
>
>  gcry_mpi_dump (mpival); putc (.'\n', stderr);
>  gcry_sexp_dump (*sign_parms)
>
>
>
> Shalom-Salam,
>
>    Werner
>
>
>
> p.s.  In general it is better to insert the actual code into the message
> so that it is possible to answer even without an online connection.

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