Require libgcrypt 1.5

Without Libgcrypt 1.5 is was not possible to use ECC keys.  ECC is
major new feature and thus it does not make sense to allow building
with an older Libgcrypt without supporting ECC.

Also fixed a few missing prototypes.

1 files changed, 3 insertions, 14 deletions

diff --git a/g10/export.c b/g10/export.c
index 47185e301..191f68b8b 100644
--- a/g10/export.c
+++ b/g10/export.c
@@ -581,11 +581,7 @@ transfer_format_to_openpgp (gcry_sexp_t s_pgp, PKT_public_key *pk)
                              skey[0], skey[1], skey[2], skey[3], skey[4]);
       if (err)
         goto leave;
-#ifdef HAVE_GCRY_PK_GET_CURVE
       curvename = gcry_pk_get_curve (s_pubkey, 0, NULL);
-#else
-      curvename = "?";
-#endif
       gcry_sexp_release (s_pubkey);
       curveoidstr = gpg_curve_to_oid (curvename, NULL);
       if (!curveoidstr)
@@ -649,17 +645,10 @@ transfer_format_to_openpgp (gcry_sexp_t s_pgp, PKT_public_key *pk)
   if (err)
     goto leave;
 
-  /* Check that the public key parameters match.  Since Libgcrypt 1.5
-     and the gcry_pk_get_curve function, gcry_mpi_cmp handles opaque
-     MPI correctly and thus we don't need to to do the extra
-     opaqueness checks.  */
+  /* Check that the public key parameters match.  Note that since
+     Libgcrypt 1.5 gcry_mpi_cmp handles opaque MPI correctly.  */
   for (idx=0; idx < npkey; idx++)
-    if (0
-#ifndef HAVE_GCRY_PK_GET_CURVE
-        || gcry_mpi_get_flag (pk->pkey[idx], GCRYMPI_FLAG_OPAQUE)
-        || gcry_mpi_get_flag (skey[idx], GCRYMPI_FLAG_OPAQUE)
-#endif
-        || gcry_mpi_cmp (pk->pkey[idx], skey[idx]))
+    if (gcry_mpi_cmp (pk->pkey[idx], skey[idx]))
       {
         err = gpg_error (GPG_ERR_BAD_PUBKEY);
         goto leave;