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common: Refactor the call-gpg code.

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* common/call-gpg.c (gpg_{en,de}crypt_blob): Move most of the code
into two new functions, _gpg_encrypt and _gpg_decrypt.

Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2015-11-24 14:58:31 +01:00
parent ba1a5cc17d
commit cb18d80230
1 changed files with 79 additions and 46 deletions
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119
common/call-gpg.c
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@ -321,11 +321,11 @@ start_reader (int fd, membuf_t *mb, npth_t *r_thread, gpg_error_t *err_addr)
*/
gpg_error_t
gpg_encrypt_blob (ctrl_t ctrl, const char *gpg_program,
static gpg_error_t
_gpg_encrypt (ctrl_t ctrl, const char *gpg_program,
const void *plain, size_t plainlen,
strlist_t keys,
void **r_ciph, size_t *r_ciphlen)
membuf_t *reader_mb)
{
gpg_error_t err;
assuan_context_t ctx = NULL;
@ -334,17 +334,10 @@ gpg_encrypt_blob (ctrl_t ctrl, const char *gpg_program,
npth_t writer_thread = (npth_t)0;
npth_t reader_thread = (npth_t)0;
gpg_error_t writer_err, reader_err;
membuf_t reader_mb;
char line[ASSUAN_LINELENGTH];
strlist_t sl;
int ret;
*r_ciph = NULL;
*r_ciphlen = 0;
/* Init the memory buffer to receive the encrypted stuff. */
init_membuf (&reader_mb, 4096);
/* Create two pipes. */
err = gnupg_create_outbound_pipe (outbound_fds);
if (!err)
@ -371,7 +364,7 @@ gpg_encrypt_blob (ctrl_t ctrl, const char *gpg_program,
/* Start a reader thread to eat from the OUTPUT command of the
server. */
err = start_reader (inbound_fds[0], &reader_mb,
err = start_reader (inbound_fds[0], reader_mb,
&reader_thread, &reader_err);
if (err)
return err;
@ -431,16 +424,6 @@ gpg_encrypt_blob (ctrl_t ctrl, const char *gpg_program,
goto leave;
}
/* Return the data. */
*r_ciph = get_membuf (&reader_mb, r_ciphlen);
if (!*r_ciph)
{
err = gpg_error_from_syserror ();
log_error ("error while storing the data in the reader thread: %s\n",
gpg_strerror (err));
goto leave;
}
leave:
/* FIXME: Not valid, as npth_t is an opaque type. */
if (reader_thread)
@ -456,20 +439,54 @@ gpg_encrypt_blob (ctrl_t ctrl, const char *gpg_program,
if (inbound_fds[1] != -1)
close (inbound_fds[1]);
release_gpg (ctx);
xfree (get_membuf (&reader_mb, NULL));
return err;
}
gpg_error_t
gpg_encrypt_blob (ctrl_t ctrl, const char *gpg_program,
const void *plain, size_t plainlen,
strlist_t keys,
void **r_ciph, size_t *r_ciphlen)
{
gpg_error_t err;
membuf_t reader_mb;
*r_ciph = NULL;
*r_ciphlen = 0;
/* Init the memory buffer to receive the encrypted stuff. */
init_membuf (&reader_mb, 4096);
err = _gpg_encrypt (ctrl, gpg_program,
plain, plainlen,
keys,
&reader_mb);
if (! err)
{
/* Return the data. */
*r_ciph = get_membuf (&reader_mb, r_ciphlen);
if (!*r_ciph)
{
err = gpg_error_from_syserror ();
log_error ("error while storing the data in the reader thread: %s\n",
gpg_strerror (err));
}
}
xfree (get_membuf (&reader_mb, NULL));
return err;
}
/* Call GPG to decrypt a block of data.
*/
gpg_error_t
gpg_decrypt_blob (ctrl_t ctrl, const char *gpg_program,
static gpg_error_t
_gpg_decrypt (ctrl_t ctrl, const char *gpg_program,
const void *ciph, size_t ciphlen,
void **r_plain, size_t *r_plainlen)
membuf_t *reader_mb)
{
gpg_error_t err;
assuan_context_t ctx = NULL;
@ -478,15 +495,8 @@ gpg_decrypt_blob (ctrl_t ctrl, const char *gpg_program,
npth_t writer_thread = (npth_t)0;
npth_t reader_thread = (npth_t)0;
gpg_error_t writer_err, reader_err;
membuf_t reader_mb;
int ret;
*r_plain = NULL;
*r_plainlen = 0;
/* Init the memory buffer to receive the encrypted stuff. */
init_membuf_secure (&reader_mb, 1024);
/* Create two pipes. */
err = gnupg_create_outbound_pipe (outbound_fds);
if (!err)
@ -513,7 +523,7 @@ gpg_decrypt_blob (ctrl_t ctrl, const char *gpg_program,
/* Start a reader thread to eat from the OUTPUT command of the
server. */
err = start_reader (inbound_fds[0], &reader_mb,
err = start_reader (inbound_fds[0], reader_mb,
&reader_thread, &reader_err);
if (err)
return err;
@ -560,16 +570,6 @@ gpg_decrypt_blob (ctrl_t ctrl, const char *gpg_program,
goto leave;
}
/* Return the data. */
*r_plain = get_membuf (&reader_mb, r_plainlen);
if (!*r_plain)
{
err = gpg_error_from_syserror ();
log_error ("error while storing the data in the reader thread: %s\n",
gpg_strerror (err));
goto leave;
}
leave:
if (reader_thread)
npth_detach (reader_thread);
@ -584,6 +584,39 @@ gpg_decrypt_blob (ctrl_t ctrl, const char *gpg_program,
if (inbound_fds[1] != -1)
close (inbound_fds[1]);
release_gpg (ctx);
return err;
}
gpg_error_t
gpg_decrypt_blob (ctrl_t ctrl, const char *gpg_program,
const void *ciph, size_t ciphlen,
void **r_plain, size_t *r_plainlen)
{
gpg_error_t err;
membuf_t reader_mb;
*r_plain = NULL;
*r_plainlen = 0;
/* Init the memory buffer to receive the encrypted stuff. */
init_membuf_secure (&reader_mb, 1024);
err = _gpg_decrypt (ctrl, gpg_program,
ciph, ciphlen,
&reader_mb);
if (! err)
{
/* Return the data. */
*r_plain = get_membuf (&reader_mb, r_plainlen);
if (!*r_plain)
{
err = gpg_error_from_syserror ();
log_error ("error while storing the data in the reader thread: %s\n",
gpg_strerror (err));
}
}
xfree (get_membuf (&reader_mb, NULL));
return err;
}