gpg: New option --chunk-size.

* g10/gpg.c (opts): New option --chunk-size.
(oChunkSize): New const.
(build_list_aead_test_algo, build_list_aead_algo_name): New.
(my_strusage): List AEAD algos.
(main): Implement --chunk-size..
* g10/options.h (struct opt): Add field 'chunk_size'.
(DBG_IPC): Remove duplicated macro.
* g10/main.h (DEFAULT_AEAD_ALGO): Depend on Libgcrypt version.
* g10/misc.c (openpgp_aead_test_algo): Ditto.

* g10/cipher-aead.c: Silence if not in debug mode.
* g10/decrypt-data.c: Ditto.
--

And that new option immediatley revealed bugs in our chunking code :-(.

1 files changed, 12 insertions, 0 deletions

diff --git a/g10/misc.c b/g10/misc.c
index 36d3bdc36..8c54793ed 100644
--- a/g10/misc.c
+++ b/g10/misc.c
@@ -591,11 +591,23 @@ openpgp_cipher_algo_name (cipher_algo_t algo)
 gpg_error_t
 openpgp_aead_test_algo (aead_algo_t algo)
 {
+  /* FIXME: We currently have no easy way to test whether libgcrypt
+   * implements a mode.  The only way we can do this is to open a
+   * cipher context with that mode and close it immediately.  That is
+   * a bit costly.  So we look at the libgcrypt version and assume
+   * nothing has been patched out.  */
   switch (algo)
     {
     case AEAD_ALGO_NONE:
       break;
+
     case AEAD_ALGO_EAX:
+#if GCRYPT_VERSION_NUMBER < 0x010900
+      break;
+#else
+      return 0;
+#endif
+
     case AEAD_ALGO_OCB:
       return 0;
     }