security-and-privacy/gnupg
security-and-privacy/gnupg
1
0
Fork 0
mirror of git://git.gnupg.org/gnupg.git synced 2025-07-02 22:46:30 +02:00
Code Activity

Implement unattended OpenPGP secret key import.

Browse source 
* agent/command.c (cmd_import_key): Add option --unattended.
* agent/cvt-openpgp.c (convert_transfer_key): New.
(do_unprotect): Factor some code out to ...
(prepare_unprotect): new function.
(convert_from_openpgp): Factor all code out to ...
(convert_from_openpgp_main): this.  Add arg 'passphrase'.  Implement
openpgp-native protection modes.
(convert_from_openpgp_native): New.
* agent/t-protect.c (convert_from_openpgp_native): New dummy fucntion
* agent/protect-tool.c (convert_from_openpgp_native): Ditto.
* agent/protect.c (agent_unprotect): Add arg CTRL.  Adjust all
callers.  Support openpgp-native protection.
* g10/call-agent.c (agent_import_key): Add arg 'unattended'.
* g10/import.c (transfer_secret_keys): Use unattended in batch mode.
--

With the gpg-agent taking care of the secret keys, the user needs to
migrate existing keys from secring.gpg to the agent.  This and also
the standard import of secret keys required the user to unprotect the
secret keys first, so that gpg-agent was able to re-protected them
using its own scheme.  With many secret keys this is quite some
usability hurdle.  In particular if a passphrase is not instantly
available.

To make this migration smoother, this patch implements an unattended
key import/migration which delays the conversion to the gpg-agent
format until the key is actually used.  For example:

   gpg2 --batch --import mysecretkey.gpg

works without any user interaction due to the use of --batch.  Now if
a key is used (e.g. "gpg2 -su USERID_FROM_MYSECRETKEY foo"), gpg-agent
has to ask for the passphrase anyway, converts the key from the
openpgp format to the internal format, signs, re-encrypts the key and
tries to store it in the gpg-agent format to the disk.  The next time,
the internal format of the key is used.

This patch has only been tested with the old demo keys, more tests
with other protection formats and no protection are needed.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2013-05-22 09:50:12 +01:00
parent cb6a64bb78
commit 7777e68d04
13 changed files with 475 additions and 171 deletions
Download patch file Download diff file Expand all files Collapse all files

5
g10/call-agent.c
View file

@ -1998,7 +1998,7 @@ inq_import_key_parms (void *opaque, const char *line)
/* Call the agent to import a key into the agent. */
gpg_error_t
agent_import_key (ctrl_t ctrl, const char *desc, char **cache_nonce_addr,
const void *key, size_t keylen)
const void *key, size_t keylen, int unattended)
{
gpg_error_t err;
struct import_key_parm_s parm;
@ -2028,7 +2028,8 @@ agent_import_key (ctrl_t ctrl, const char *desc, char **cache_nonce_addr,
parm.key = key;
parm.keylen = keylen;
snprintf (line, sizeof line, "IMPORT_KEY%s%s",
snprintf (line, sizeof line, "IMPORT_KEY%s%s%s",
unattended? " --unattended":"",
cache_nonce_addr && *cache_nonce_addr? " ":"",
cache_nonce_addr && *cache_nonce_addr? *cache_nonce_addr:"");
cn_parm.cache_nonce_addr = cache_nonce_addr;

2
g10/call-agent.h
View file

@ -177,7 +177,7 @@ gpg_error_t agent_keywrap_key (ctrl_t ctrl, int forexport,
/* Send a key to the agent. */
gpg_error_t agent_import_key (ctrl_t ctrl, const char *desc,
char **cache_nonce_addr,
const void *key, size_t keylen);
const void *key, size_t keylen, int unattended);
/* Receive a key from the agent. */
gpg_error_t agent_export_key (ctrl_t ctrl, const char *keygrip,

2
g10/import.c
View file

@ -1432,7 +1432,7 @@ transfer_secret_keys (ctrl_t ctrl, struct stats_s *stats, kbnode_t sec_keyblock)
{
char *desc = gpg_format_keydesc (pk, 1, 1);
err = agent_import_key (ctrl, desc, &cache_nonce,
wrappedkey, wrappedkeylen);
wrappedkey, wrappedkeylen, opt.batch);
xfree (desc);
}
if (!err)