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gpg: Add pinentry-mode feature.

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* g10/gpg.c: Include shareddefs.h.
(main): Add option --pinentry-mode.
* g10/options.h (struct opt): Add field pinentry_mode.
* g10/passphrase.c: Include shareddefs.h.
(have_static_passphrase): Take care of loopback pinentry_mode.
(read_passphrase_from_fd): Ditto.
(get_static_passphrase): New.
(passphrase_to_dek_ext): Factor some code out to ...
(emit_status_need_passphrase): new.
* g10/call-agent.c (start_agent): Send the pinentry mode.
(default_inq_cb): Take care of the PASSPHRASE inquiry.  Return a
proper error code.
(agent_pksign): Add args keyid, mainkeyid and pubkey_algo.
(agent_pkdecrypt): Ditto.
* g10/pubkey-enc.c (get_it): Pass new args.
* g10/sign.c (do_sign): Pass new args.

* g10/call-agent.c (struct default_inq_parm_s): New.  Change all
similar structs to reference this one.  Change all users and inquire
callback to use this struct, instead of NULL or some undefined but not
used structs.  This change will help to eventually get rid of global
variables.
--

This new features allows to use gpg without a Pinentry.  As a
prerequisite the agent must be configured to allow the loopback
pinentry mode (option --allow-loopback-pinentry).  For example

  gpg2 --pinentry-mode=loopback FILE.gpg

may be used to decrypt FILE.gpg while entering the passphrase on the
tty.  If batch is used, --passphrase et al. may be used, if
--command-fd is used, the passphrase may be provided by another
process.  Note that there are no try-again prompts in case of a bad
passphrase.
This commit is contained in:
Werner Koch 2013-02-07 20:37:58 +01:00
parent 84de484bc3
commit 21feecd48f
10 changed files with 301 additions and 81 deletions
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3
g10/keydb.h
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@ -181,6 +181,7 @@ unsigned char encode_s2k_iterations (int iterations);
assuan_context_t agent_open (int try, const char *orig_codeset);
void agent_close (assuan_context_t ctx);
int have_static_passphrase(void);
const char *get_static_passphrase (void);
void set_passphrase_from_string(const char *pass);
void read_passphrase_from_fd( int fd );
void passphrase_clear_cache ( u32 *keyid, const char *cacheid, int algo );
@ -196,6 +197,8 @@ void set_next_passphrase( const char *s );
char *get_last_passphrase(void);
void next_to_last_passphrase(void);
void emit_status_need_passphrase (u32 *keyid, u32 *mainkeyid, int pubkey_algo);
char *gpg_format_keydesc (PKT_public_key *pk, int mode, int escaped);