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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>
This commit is contained in:
Justus Winter 2015-11-24 18:39:30 +01:00
parent 03bf88f32c
commit 40dbee86f3
6 changed files with 118 additions and 56 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/Makefile.am
View File

@ -142,9 +142,9 @@ gpgtar_SOURCES = \
gpgtar-extract.c \
gpgtar-list.c \
no-libgcrypt.c
gpgtar_CFLAGS = $(GPG_ERROR_CFLAGS) $(PTH_CFLAGS)
#gpgtar_LDADD = $(commonpth_libs) $(PTH_LIBS) $(GPG_ERROR_LIBS)
gpgtar_LDADD = $(common_libs) $(GPG_ERROR_LIBS) \
gpgtar_CFLAGS = $(GPG_ERROR_CFLAGS) $(NPTH_CFLAGS) $(LIBASSUAN_CFLAGS)
gpgtar_LDADD = $(libcommonpth) $(GPG_ERROR_LIBS) \
$(NPTH_LIBS) $(LIBASSUAN_LIBS) \
$(LIBINTL) $(NETLIBS) $(LIBICONV) $(W32SOCKLIBS)

38
tools/gpgtar-create.c
View File

@ -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);
}

24
tools/gpgtar-extract.c
View File

@ -28,6 +28,7 @@
#include <assert.h>
#include "i18n.h"
#include "../common/call-gpg.h"
#include "../common/sysutils.h"
#include "gpgtar.h"
@ -265,10 +266,11 @@ create_directory (const char *dirprefix)
void
gpgtar_extract (const char *filename)
gpgtar_extract (const char *filename, int decrypt)
{
gpg_error_t err;
estream_t stream;
estream_t cipher_stream = NULL;
tar_header_t header = NULL;
const char *dirprefix = NULL;
char *dirname = NULL;
@ -292,6 +294,24 @@ gpgtar_extract (const char *filename)
if (stream == es_stdin)
es_set_binary (es_stdin);
if (decrypt)
{
cipher_stream = stream;
stream = es_fopenmem (0, "rwb");
if (! stream)
{
err = gpg_error_from_syserror ();
goto leave;
}
err = gpg_decrypt_stream (NULL, NULL, cipher_stream, stream);
if (err)
goto leave;
err = es_fseek (stream, 0, SEEK_SET);
if (err)
goto leave;
}
if (filename)
{
dirprefix = strrchr (filename, '/');
@ -340,5 +360,7 @@ gpgtar_extract (const char *filename)
xfree (dirname);
if (stream != es_stdin)
es_fclose (stream);
if (stream != cipher_stream)
es_fclose (cipher_stream);
return;
}

24
tools/gpgtar-list.c
View File

@ -26,6 +26,7 @@
#include "i18n.h"
#include "gpgtar.h"
#include "../common/call-gpg.h"
@ -267,10 +268,11 @@ print_header (tar_header_t header, estream_t out)
/* List the tarball FILENAME or, if FILENAME is NULL, the tarball read
from stdin. */
void
gpgtar_list (const char *filename)
gpgtar_list (const char *filename, int decrypt)
{
gpg_error_t err;
estream_t stream;
estream_t cipher_stream = NULL;
tar_header_t header;
if (filename)
@ -292,6 +294,24 @@ gpgtar_list (const char *filename)
if (stream == es_stdin)
es_set_binary (es_stdin);
if (decrypt)
{
cipher_stream = stream;
stream = es_fopenmem (0, "rwb");
if (! stream)
{
err = gpg_error_from_syserror ();
goto leave;
}
err = gpg_decrypt_stream (NULL, NULL, cipher_stream, stream);
if (err)
goto leave;
err = es_fseek (stream, 0, SEEK_SET);
if (err)
goto leave;
}
for (;;)
{
header = read_header (stream);
@ -311,6 +331,8 @@ gpgtar_list (const char *filename)
xfree (header);
if (stream != es_stdin)
es_fclose (stream);
if (stream != cipher_stream)
es_fclose (cipher_stream);
return;
}

72
tools/gpgtar.c
View File

@ -27,7 +27,9 @@
gpg. So here we go. */
#include <config.h>
#include <assuan.h>
#include <errno.h>
#include <npth.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -99,13 +101,6 @@ static ARGPARSE_OPTS opts[] = {
};
static void tar_and_encrypt (char **inpattern);
static void decrypt_and_untar (const char *fname);
static void decrypt_and_list (const char *fname);
/* Print usage information and and provide strings for help. */
static const char *
@ -156,6 +151,7 @@ set_cmd (enum cmd_and_opt_values *ret_cmd, enum cmd_and_opt_values new_cmd)
*ret_cmd = cmd;
}
ASSUAN_SYSTEM_NPTH_IMPL;
/* gpgtar main. */
@ -179,6 +175,11 @@ main (int argc, char **argv)
/* Make sure that our subsystems are ready. */
i18n_init();
init_common_subsystems (&argc, &argv);
npth_init ();
assuan_set_assuan_log_prefix (log_get_prefix (NULL));
assuan_set_gpg_err_source (GPG_ERR_SOURCE_DEFAULT);
assuan_set_system_hooks (ASSUAN_SYSTEM_NPTH);
assuan_sock_init ();
/* Parse the command line. */
pargs.argc = &argc;
@ -203,7 +204,17 @@ main (int argc, char **argv)
set_cmd (&cmd, pargs.r_opt);
break;
case oRecipient:
add_to_strlist (&opt.recipients, pargs.r.ret_str);
break;
case oUser:
log_info ("note: ignoring option --user\n");
opt.user = pargs.r.ret_str;
break;
case oSymmetric:
log_info ("note: ignoring option --symmetric\n");
set_cmd (&cmd, aEncrypt);
opt.symmetric = 1;
break;
@ -237,6 +248,10 @@ main (int argc, char **argv)
log_info (_("NOTE: '%s' is not considered an option\n"), argv[i]);
}
if (opt.verbose > 1)
opt.debug_level = 1024;
setup_libassuan_logging (&opt.debug_level);
switch (cmd)
{
case aList:
@ -247,10 +262,7 @@ main (int argc, char **argv)
log_info ("note: ignoring option --set-filename\n");
if (files_from)
log_info ("note: ignoring option --files-from\n");
if (skip_crypto)
gpgtar_list (fname);
else
decrypt_and_list (fname);
gpgtar_list (fname, !skip_crypto);
break;
case aEncrypt:
@ -259,10 +271,7 @@ main (int argc, char **argv)
usage (1);
if (opt.filename)
log_info ("note: ignoring option --set-filename\n");
if (skip_crypto)
gpgtar_create (null_names? NULL :argv);
else
tar_and_encrypt (null_names? NULL : argv);
gpgtar_create (null_names? NULL :argv, !skip_crypto);
break;
case aDecrypt:
@ -273,10 +282,7 @@ main (int argc, char **argv)
if (files_from)
log_info ("note: ignoring option --files-from\n");
fname = argc ? *argv : NULL;
if (skip_crypto)
gpgtar_extract (fname);
else
decrypt_and_untar (fname);
gpgtar_extract (fname, !skip_crypto);
break;
default:
@ -378,31 +384,3 @@ openpgp_message_p (estream_t fp)
return 0;
}
#endif
static void
tar_and_encrypt (char **inpattern)
{
(void)inpattern;
log_error ("tar_and_encrypt has not yet been implemented\n");
}
static void
decrypt_and_untar (const char *fname)
{
(void)fname;
log_error ("decrypt_and_untar has not yet been implemented\n");
}
static void
decrypt_and_list (const char *fname)
{
(void)fname;
log_error ("decrypt_and_list has not yet been implemented\n");
}

10
tools/gpgtar.h
View File

@ -21,13 +21,17 @@
#define GPGTAR_H
#include "../common/util.h"
#include "../common/strlist.h"
/* We keep all global options in the structure OPT. */
struct
{
int verbose;
unsigned int debug_level;
int quiet;
const char *outfile;
strlist_t recipients;
const char *user;
int symmetric;
const char *filename;
} opt;
@ -111,13 +115,13 @@ gpg_error_t read_record (estream_t stream, void *record);
gpg_error_t write_record (estream_t stream, const void *record);
/*-- gpgtar-create.c --*/
void gpgtar_create (char **inpattern);
void gpgtar_create (char **inpattern, int encrypt);
/*-- gpgtar-extract.c --*/
void gpgtar_extract (const char *filename);
void gpgtar_extract (const char *filename, int decrypt);
/*-- gpgtar-list.c --*/
void gpgtar_list (const char *filename);
void gpgtar_list (const char *filename, int decrypt);
tar_header_t gpgtar_read_header (estream_t stream);
void gpgtar_print_header (tar_header_t header, estream_t out);