Require Libgcrypt 1.9

* configure.ac: Require at least Libgcrypt 1.9.0.  Remove all
GCRYPT_VERSION_NUMBER dependent code.
--

Only Libgcrypt 1.9 implements EAX which is a mandatory algorithm in
RFC4880bis.

Signed-off-by: Werner Koch <wk@gnupg.org>

agent/command.c

@@ -3530,7 +3530,6 @@ cmd_getinfo (assuan_context_t ctx, char *line)
     }
   else if (!strcmp (line, "jent_active"))
     {
-#if GCRYPT_VERSION_NUMBER >= 0x010800
       char *buf;
       const char *fields[5];
 
@@ -3542,9 +3541,6 @@ cmd_getinfo (assuan_context_t ctx, char *line)
       else
         rc = gpg_error (GPG_ERR_FALSE);
       gcry_free (buf);
-#else
-      rc = gpg_error (GPG_ERR_FALSE);
-#endif
     }
   else if (!strcmp (line, "s2k_count_cal"))
     {

agent/gpg-agent.c

@@ -1007,9 +1007,7 @@ thread_init_once (void)
    * has already been initialized but at that point nPth was not
    * initialized and thus Libgcrypt could not set its system call
    * clamp.  */
-#if GCRYPT_VERSION_NUMBER >= 0x010800 /* 1.8.0 */
   gcry_control (GCRYCTL_REINIT_SYSCALL_CLAMP, 0, 0);
-#endif
 }
 
 
@@ -1817,23 +1815,6 @@ agent_libgcrypt_progress_cb (void *data, const char *what, int printchar,
       break;
   if (dispatch && dispatch->cb)
     dispatch->cb (dispatch->ctrl, what, printchar, current, total);
-
-  /* Libgcrypt < 1.8 does not know about nPth and thus when it reads
-   * from /dev/random this will block the process.  To mitigate this
-   * problem we yield the thread when Libgcrypt tells us that it needs
-   * more entropy.  This way other threads have chance to run.  */
-#if GCRYPT_VERSION_NUMBER < 0x010800 /* 1.8.0 */
-  if (what && !strcmp (what, "need_entropy"))
-    {
-#if GPGRT_VERSION_NUMBER < 0x011900 /* 1.25 */
-      /* In older gpg-error versions gpgrt_yield is buggy for use with
-       * nPth and thus we need to resort to a sleep call.  */
-      npth_usleep (1000); /* 1ms */
-#else
-      gpgrt_yield ();
-#endif
-    }
-#endif
 }
 
 

agent/pksign.c

@@ -513,12 +513,6 @@ agent_pksign_do (ctrl_t ctrl, const char *cache_nonce,
       if (err)
         goto leave;
 
-      if (algo == GCRY_PK_RSA && GCRYPT_VERSION_NUMBER < 0x010700)
-        {
-          /* It's RSA and Libgcrypt < 1.7 */
-          check_signature = 1;
-        }
-
       if (DBG_CRYPTO)
         {
           gcry_log_debugsxp ("skey", s_skey);