Add a custom prompt for the CSR generation.

Add a new percent escape fucntion.

common/t-percent.c

@@ -0,0 +1,97 @@
+/* t-percent.c - Module test for percent.c
+ *	Copyright (C) 2008 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "util.h"
+
+#define pass()  do { ; } while(0)
+#define fail(a)  do { fprintf (stderr, "%s:%d: test %d failed\n",\
+                               __FILE__,__LINE__, (a));          \
+                     exit (1);                                   \
+                   } while(0)
+
+static void
+test_percent_plus_escape (void)
+{
+  static struct {
+    const char *string;
+    const char *expect;
+  } tbl[] = {
+    { 
+      "",
+      "" 
+    }, { 
+      "a",
+      "a",
+    }, { 
+      " ",
+      "+",
+    }, { 
+      "  ",
+      "++"
+    }, { 
+      "+ +",
+      "%2B+%2B"
+    }, { 
+      "\" \"",
+      "%22+%22"
+    }, { 
+      "%22",
+      "%2522"
+    }, { 
+      "%% ",
+      "%25%25+"
+    }, { 
+      "\n ABC\t",
+      "%0A+ABC%09"
+    }, { NULL, NULL }
+  };
+  char *buf;
+  int i;
+  
+  for (i=0; tbl[i].string; i++)
+    {
+      buf = percent_plus_escape (tbl[i].string);
+      if (!buf)
+        {
+          fprintf (stderr, "out of core: %s\n", strerror (errno));
+          exit (2);
+        }
+      if (strcmp (buf, tbl[i].expect))
+        fail (i);
+      xfree (buf);
+    }
+}
+
+
+int
+main (int argc, char **argv)
+{
+  (void)argc;
+  (void)argv;
+  
+  test_percent_plus_escape ();
+
+  return 0;
+}
+