From 40dbee86f3043aff8a8c2055521e270318e33068 Mon Sep 17 00:00:00 2001
From: Justus Winter <justus@g10code.com>
Date: Tue, 24 Nov 2015 18:39:30 +0100
Subject: tools: Add encryption and decryption support to gpgtar.

* tools/Makefile.am: Amend CFLAGS and LDADD.
* tools/gpgtar-create.c (gpgtar_create): Add encrypt flag and encrypt
stream if requested.
* tools/gpgtar-extract.c (gpgtar_extract): Likewise for decryption.
* tools/gpgtar-list.c (gpgtar_list): Likewise.
* tools/gpgtar.c (main): Initialize npth and assuan.  Parse recipient
and local user, and note which flags are currently ignored.  Adapt
calls to gpgtar_list and friends.
(tar_and_encrypt): Drop stub function and prototype.
(decrypt_and_untar): Likewise.
(decrypt_and_list): Likewise.
* tools/gpgtar.h (gpgtar_{create,extract,list}): Add encryption or
decryption argument.

Signed-off-by: Justus Winter <justus@g10code.com>
---
 tools/gpgtar-create.c | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

(limited to 'tools/gpgtar-create.c')

diff --git a/tools/gpgtar-create.c b/tools/gpgtar-create.c
index fad6d57ae..59b88bfb9 100644
--- a/tools/gpgtar-create.c
+++ b/tools/gpgtar-create.c
@@ -36,6 +36,7 @@
 #include <assert.h>
 
 #include "i18n.h"
+#include "../common/call-gpg.h"
 #include "../common/sysutils.h"
 #include "gpgtar.h"
 
@@ -740,13 +741,14 @@ write_eof_mark (estream_t stream)
    INPATTERN is NULL take the pattern as null terminated strings from
    stdin.  */
 void
-gpgtar_create (char **inpattern)
+gpgtar_create (char **inpattern, int encrypt)
 {
   gpg_error_t err = 0;
   struct scanctrl_s scanctrl_buffer;
   scanctrl_t scanctrl = &scanctrl_buffer;
   tar_header_t hdr, *start_tail;
   estream_t outstream = NULL;
+  estream_t cipher_stream = NULL;
   int eof_seen = 0;
 
   if (!inpattern)
@@ -863,6 +865,17 @@ gpgtar_create (char **inpattern)
   if (outstream == es_stdout)
     es_set_binary (es_stdout);
 
+  if (encrypt)
+    {
+      cipher_stream = outstream;
+      outstream = es_fopenmem (0, "rwb");
+      if (! outstream)
+        {
+          err = gpg_error_from_syserror ();
+          goto leave;
+        }
+    }
+
   for (hdr = scanctrl->flist; hdr; hdr = hdr->next)
     {
       err = write_file (outstream, hdr);
@@ -870,6 +883,22 @@ gpgtar_create (char **inpattern)
         goto leave;
     }
   err = write_eof_mark (outstream);
+  if (err)
+    goto leave;
+
+  if (encrypt)
+    {
+      err = es_fseek (outstream, 0, SEEK_SET);
+      if (err)
+        goto leave;
+
+      err = gpg_encrypt_stream (NULL, NULL,
+                                outstream,
+                                opt.recipients,
+                                cipher_stream);
+      if (err)
+        goto leave;
+    }
 
  leave:
   if (!err)
@@ -879,6 +908,11 @@ gpgtar_create (char **inpattern)
       else
         err = es_fflush (outstream);
       outstream = NULL;
+      if (cipher_stream != es_stdout)
+        err = es_fclose (cipher_stream);
+      else
+        err = es_fflush (cipher_stream);
+      cipher_stream = NULL;
     }
   if (err)
     {
@@ -886,6 +920,8 @@ gpgtar_create (char **inpattern)
                  es_fname_get (outstream), gpg_strerror (err));
       if (outstream && outstream != es_stdout)
         es_fclose (outstream);
+      if (cipher_stream && cipher_stream != es_stdout)
+        es_fclose (cipher_stream);
       if (opt.outfile)
         gnupg_remove (opt.outfile);
     }
-- 
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