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* command.c (cmd_setkeydesc): New.

Browse Source 
(register_commands): Add command SETKEYDESC.
(cmd_pksign, cmd_pkdecrypt): Use the key description.
(reset_notify): Reset the description.
* findkey.c (unprotect): Add arg DESC_TEXT.
(agent_key_from_file): Ditto.
* pksign.c (agent_pksign): Ditto.
* pkdecrypt.c (agent_pkdecrypt): Ditto. Made CIPHERTEXT an
unsigned char*.
This commit is contained in:
Werner Koch 2004-02-13 17:06:34 +00:00
parent e98b7a9b21
commit cbff0b05e5
7 changed files with 134 additions and 53 deletions
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7
NEWS
View File

@ -5,8 +5,11 @@ Noteworthy changes in version 1.9.5
Cleaned up the build system to better comply with the coding
standards.
* The --import command is now able to autodetect pkcs#12 files and
import secret and private keys from this file format.
* [gpgsm] The --import command is now able to autodetect pkcs#12
files and import secret and private keys from this file format.
* [gpgsm] The pinentry will no present a description of the key for
whom the passphrase is requests.
Noteworthy changes in version 1.9.4 (2004-01-30)

10
agent/ChangeLog
View File

@ -1,5 +1,15 @@
2004-02-13 Werner Koch <wk@gnupg.org>
* command.c (cmd_setkeydesc): New.
(register_commands): Add command SETKEYDESC.
(cmd_pksign, cmd_pkdecrypt): Use the key description.
(reset_notify): Reset the description.
* findkey.c (unprotect): Add arg DESC_TEXT.
(agent_key_from_file): Ditto.
* pksign.c (agent_pksign): Ditto.
* pkdecrypt.c (agent_pkdecrypt): Ditto. Made CIPHERTEXT an
unsigned char*.
* protect-tool.c (main): New options --no-fail-on-exist, --homedir.
(store_private_key): Use them here.

30
agent/agent.h
View File

@ -132,18 +132,20 @@ void start_command_handler (int, int);
/*-- findkey.c --*/
int agent_write_private_key (const unsigned char *grip,
const void *buffer, size_t length, int force);
gpg_error_t agent_key_from_file (CTRL ctrl, const unsigned char *grip,
gpg_error_t agent_key_from_file (ctrl_t ctrl,
const char *desc_text,
const unsigned char *grip,
unsigned char **shadow_info,
int ignore_cache, gcry_sexp_t *result);
int agent_key_available (const unsigned char *grip);
/*-- query.c --*/
int agent_askpin (CTRL ctrl,
int agent_askpin (ctrl_t ctrl,
const char *desc_text, struct pin_entry_info_s *pininfo);
int agent_get_passphrase (CTRL ctrl, char **retpass,
int agent_get_passphrase (ctrl_t ctrl, char **retpass,
const char *desc, const char *prompt,
const char *errtext);
int agent_get_confirmation (CTRL ctrl, const char *desc, const char *ok,
int agent_get_confirmation (ctrl_t ctrl, const char *desc, const char *ok,
const char *cancel);
/*-- cache.c --*/
@ -154,16 +156,18 @@ void agent_unlock_cache_entry (void **cache_id);
/*-- pksign.c --*/
int agent_pksign (CTRL ctrl, FILE *outfp, int ignore_cache);
int agent_pksign (ctrl_t ctrl, const char *desc_text,
FILE *outfp, int ignore_cache);
/*-- pkdecrypt.c --*/
int agent_pkdecrypt (CTRL ctrl, const char *ciphertext, size_t ciphertextlen,
int agent_pkdecrypt (ctrl_t ctrl, const char *desc_text,
const unsigned char *ciphertext, size_t ciphertextlen,
FILE *outfp);
/*-- genkey.c --*/
int agent_genkey (CTRL ctrl,
int agent_genkey (ctrl_t ctrl,
const char *keyparam, size_t keyparmlen, FILE *outfp);
int agent_protect_and_store (CTRL ctrl, gcry_sexp_t s_skey);
int agent_protect_and_store (ctrl_t ctrl, gcry_sexp_t s_skey);
/*-- protect.c --*/
int agent_protect (const unsigned char *plainkey, const char *passphrase,
@ -181,18 +185,20 @@ int agent_get_shadow_info (const unsigned char *shadowkey,
/*-- trustlist.c --*/
int agent_istrusted (const char *fpr);
int agent_listtrusted (void *assuan_context);
int agent_marktrusted (CTRL ctrl, const char *name, const char *fpr, int flag);
int agent_marktrusted (ctrl_t ctrl, const char *name,
const char *fpr, int flag);
/*-- divert-scd.c --*/
int divert_pksign (CTRL ctrl,
int divert_pksign (ctrl_t ctrl,
const unsigned char *digest, size_t digestlen, int algo,
const unsigned char *shadow_info, unsigned char **r_sig);
int divert_pkdecrypt (CTRL ctrl,
int divert_pkdecrypt (ctrl_t ctrl,
const unsigned char *cipher,
const unsigned char *shadow_info,
char **r_buf, size_t *r_len);
int divert_generic_cmd (CTRL ctrl, const char *cmdline, void *assuan_context);
int divert_generic_cmd (ctrl_t ctrl,
const char *cmdline, void *assuan_context);
/*-- call-scd.c --*/

114
agent/command.c
View File

@ -1,5 +1,5 @@
/* command.c - gpg-agent command handler
* Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
* Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -50,6 +50,8 @@ struct server_local_s {
ASSUAN_CONTEXT assuan_ctx;
int message_fd;
int use_cache_for_signing;
char *keydesc; /* Allocated description fro the next key
operation. */
};
@ -59,11 +61,14 @@ struct server_local_s {
static void
reset_notify (ASSUAN_CONTEXT ctx)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
memset (ctrl->keygrip, 0, 20);
ctrl->have_keygrip = 0;
ctrl->digest.valuelen = 0;
xfree (ctrl->server_local->keydesc);
ctrl->server_local->keydesc = NULL;
}
@ -78,6 +83,18 @@ has_option (const char *line, const char *name)
return (s && (s == line || spacep (s-1)) && (!s[n] || spacep (s+n)));
}
/* Replace all '+' by a blank. */
static void
plus_to_blank (char *s)
{
for (; *s; s++)
{
if (*s == '+')
*s = ' ';
}
}
/* Parse a hex string. Return an Assuan error code or 0 on success and the
length of the parsed string in LEN. */
static int
@ -179,7 +196,7 @@ cmd_listtrusted (ASSUAN_CONTEXT ctx, char *line)
static int
cmd_marktrusted (ASSUAN_CONTEXT ctx, char *line)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc, n, i;
char *p;
char fpr[41];
@ -245,7 +262,7 @@ static int
cmd_sigkey (ASSUAN_CONTEXT ctx, char *line)
{
int rc;
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
rc = parse_keygrip (ctx, line, ctrl->keygrip);
if (rc)
@ -255,6 +272,50 @@ cmd_sigkey (ASSUAN_CONTEXT ctx, char *line)
}
/* SETKEYDESC plus_percent_escaped_string:
Set a description to be used for the next PKSIGN or PKDECRYPT
operation if this operation requires the entry of a passphrase. If
this command is not used a default text will be used. Note, that
this description implictly selects the label used for the entry
box; if the string contains the string PIN (which in general will
not be translated), "PIN" is used, other wiese the translation of
'passphrase" is used. The description string should not contain
blanks unless they are percent or '+' escaped.
The descrition is only valid for the next PKSIGN or PKDECRYPT
operation.
*/
static int
cmd_setkeydesc (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
char *desc, *p;
for (p=line; *p == ' '; p++)
;
desc = p;
p = strchr (desc, ' ');
if (p)
*p = 0; /* We ignore any garbage; we might late use it for other args. */
if (!desc || !*desc)
return set_error (Parameter_Error, "no description given");
/* Note, that we only need to replace the + characters and should
leave the other escaping in place because the escaped string is
send verbatim to the pinentry which does the unescaping (but not
the + replacing) */
plus_to_blank (desc);
xfree (ctrl->server_local->keydesc);
ctrl->server_local->keydesc = xtrystrdup (desc);
if (!ctrl->server_local->keydesc)
return map_to_assuan_status (gpg_error_from_errno (errno));
return 0;
}
/* SETHASH <algonumber> <hexstring>
The client can use this command to tell the server about the data
@ -265,7 +326,7 @@ cmd_sethash (ASSUAN_CONTEXT ctx, char *line)
int rc;
size_t n;
char *p;
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
unsigned char *buf;
char *endp;
int algo;
@ -307,16 +368,19 @@ cmd_pksign (ASSUAN_CONTEXT ctx, char *line)
{
int rc;
int ignore_cache = 0;
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
if (opt.ignore_cache_for_signing)
ignore_cache = 1;
else if (!ctrl->server_local->use_cache_for_signing)
ignore_cache = 1;
rc = agent_pksign (ctrl, assuan_get_data_fp (ctx), ignore_cache);
rc = agent_pksign (ctrl, ctrl->server_local->keydesc,
assuan_get_data_fp (ctx), ignore_cache);
if (rc)
log_error ("command pksign failed: %s\n", gpg_strerror (rc));
xfree (ctrl->server_local->keydesc);
ctrl->server_local->keydesc = NULL;
return map_to_assuan_status (rc);
}
@ -328,7 +392,7 @@ static int
cmd_pkdecrypt (ASSUAN_CONTEXT ctx, char *line)
{
int rc;
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
unsigned char *value;
size_t valuelen;
@ -338,10 +402,13 @@ cmd_pkdecrypt (ASSUAN_CONTEXT ctx, char *line)
if (rc)
return rc;
rc = agent_pkdecrypt (ctrl, value, valuelen, assuan_get_data_fp (ctx));
rc = agent_pkdecrypt (ctrl, ctrl->server_local->keydesc,
value, valuelen, assuan_get_data_fp (ctx));
xfree (value);
if (rc)
log_error ("command pkdecrypt failed: %s\n", gpg_strerror (rc));
xfree (ctrl->server_local->keydesc);
ctrl->server_local->keydesc = NULL;
return map_to_assuan_status (rc);
}
@ -363,7 +430,7 @@ cmd_pkdecrypt (ASSUAN_CONTEXT ctx, char *line)
static int
cmd_genkey (ASSUAN_CONTEXT ctx, char *line)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
unsigned char *value;
size_t valuelen;
@ -381,16 +448,6 @@ cmd_genkey (ASSUAN_CONTEXT ctx, char *line)
}
static void
plus_to_blank (char *s)
{
for (; *s; s++)
{
if (*s == '+')
*s = ' ';
}
}
/* GET_PASSPHRASE <cache_id> [<error_message> <prompt> <description>]
This function is usually used to ask for a passphrase to be used
@ -405,7 +462,7 @@ plus_to_blank (char *s)
static int
cmd_get_passphrase (ASSUAN_CONTEXT ctx, char *line)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
const char *pw;
char *response;
@ -530,15 +587,15 @@ cmd_clear_passphrase (ASSUAN_CONTEXT ctx, char *line)
command uses a syntax which helps clients to use the agent with
minimum effort. The agent either returns with an error or with a
OK. Note, that the length of DESCRIPTION is implicitly limited by
the maximum length of a command. DESCRIPTION should not conmtain
ant spaces, those must be encoded either percent escaped or simply
the maximum length of a command. DESCRIPTION should not contain
any spaces, those must be encoded either percent escaped or simply
as '+'.
*/
static int
cmd_get_confirmation (ASSUAN_CONTEXT ctx, char *line)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
char *desc = NULL;
char *p;
@ -596,7 +653,7 @@ cmd_learn (ASSUAN_CONTEXT ctx, char *line)
static int
cmd_passwd (ASSUAN_CONTEXT ctx, char *line)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
unsigned char grip[20];
gcry_sexp_t s_skey = NULL;
@ -607,7 +664,7 @@ cmd_passwd (ASSUAN_CONTEXT ctx, char *line)
return rc; /* we can't jump to leave because this is already an
Assuan error code. */
rc = agent_key_from_file (ctrl, grip, &shadow_info, 1, &s_skey);
rc = agent_key_from_file (ctrl, NULL, grip, &shadow_info, 1, &s_skey);
if (rc)
;
else if (!s_skey)
@ -633,7 +690,7 @@ cmd_passwd (ASSUAN_CONTEXT ctx, char *line)
static int
cmd_scd (ASSUAN_CONTEXT ctx, char *line)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
rc = divert_generic_cmd (ctrl, line, ctx);
@ -646,7 +703,7 @@ cmd_scd (ASSUAN_CONTEXT ctx, char *line)
static int
option_handler (ASSUAN_CONTEXT ctx, const char *key, const char *value)
{
CTRL ctrl = assuan_get_pointer (ctx);
ctrl_t ctrl = assuan_get_pointer (ctx);
if (!strcmp (key, "display"))
{
@ -715,6 +772,7 @@ register_commands (ASSUAN_CONTEXT ctx)
{ "HAVEKEY", cmd_havekey },
{ "SIGKEY", cmd_sigkey },
{ "SETKEY", cmd_sigkey },
{ "SETKEYDESC", cmd_setkeydesc },
{ "SETHASH", cmd_sethash },
{ "PKSIGN", cmd_pksign },
{ "PKDECRYPT", cmd_pkdecrypt },

16
agent/findkey.c
View File

@ -1,5 +1,5 @@
/* findkey.c - locate the secret key
* Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
* Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -138,9 +138,10 @@ try_unprotect_cb (struct pin_entry_info_s *pi)
/* Unprotect the canconical encoded S-expression key in KEYBUF. GRIP
should be the hex encoded keygrip of that key to be used with the
caching mechanism. */
caching mechanism. DESC_TEXT may be set to override the default
description used for the pinentry. */
static int
unprotect (CTRL ctrl,
unprotect (CTRL ctrl, const char *desc_text,
unsigned char **keybuf, const unsigned char *grip, int ignore_cache)
{
struct pin_entry_info_s *pi;
@ -184,7 +185,7 @@ unprotect (CTRL ctrl,
arg.unprotected_key = NULL;
pi->check_cb_arg = &arg;
rc = agent_askpin (ctrl, NULL, pi);
rc = agent_askpin (ctrl, desc_text, pi);
if (!rc)
{
assert (arg.unprotected_key);
@ -203,9 +204,10 @@ unprotect (CTRL ctrl,
diverted to a token; SHADOW_INFO will point then to an allocated
S-Expression with the shadow_info part from the file. With
IGNORE_CACHE passed as true the passphrase is not taken from the
cache.*/
cache. DESC_TEXT may be set to present a custom description for the
pinentry. */
gpg_error_t
agent_key_from_file (CTRL ctrl,
agent_key_from_file (CTRL ctrl, const char *desc_text,
const unsigned char *grip, unsigned char **shadow_info,
int ignore_cache, gcry_sexp_t *result)
{
@ -286,7 +288,7 @@ agent_key_from_file (CTRL ctrl,
case PRIVATE_KEY_CLEAR:
break; /* no unprotection needed */
case PRIVATE_KEY_PROTECTED:
rc = unprotect (ctrl, &buf, grip, ignore_cache);
rc = unprotect (ctrl, desc_text, &buf, grip, ignore_cache);
if (rc)
log_error ("failed to unprotect the secret key: %s\n",
gpg_strerror (rc));

6
agent/pkdecrypt.c
View File

@ -35,7 +35,8 @@
Try to get the key from CTRL and write the decoded stuff back to
OUTFP. */
int
agent_pkdecrypt (CTRL ctrl, const char *ciphertext, size_t ciphertextlen,
agent_pkdecrypt (CTRL ctrl, const char *desc_text,
const unsigned char *ciphertext, size_t ciphertextlen,
FILE *outfp)
{
gcry_sexp_t s_skey = NULL, s_cipher = NULL, s_plain = NULL;
@ -64,7 +65,8 @@ agent_pkdecrypt (CTRL ctrl, const char *ciphertext, size_t ciphertextlen,
log_printhex ("keygrip:", ctrl->keygrip, 20);
log_printhex ("cipher: ", ciphertext, ciphertextlen);
}
rc = agent_key_from_file (ctrl, ctrl->keygrip, &shadow_info, 0, &s_skey);
rc = agent_key_from_file (ctrl, desc_text,
ctrl->keygrip, &shadow_info, 0, &s_skey);
if (rc)
{
log_error ("failed to read the secret key\n");

4
agent/pksign.c
View File

@ -70,7 +70,7 @@ do_encode_md (const byte * md, size_t mdlen, int algo, gcry_sexp_t * r_hash)
/* SIGN whatever information we have accumulated in CTRL and write it
back to OUTFP. */
int
agent_pksign (CTRL ctrl, FILE *outfp, int ignore_cache)
agent_pksign (CTRL ctrl, const char *desc_text, FILE *outfp, int ignore_cache)
{
gcry_sexp_t s_skey = NULL, s_hash = NULL, s_sig = NULL;
unsigned char *shadow_info = NULL;
@ -81,7 +81,7 @@ agent_pksign (CTRL ctrl, FILE *outfp, int ignore_cache)
if (!ctrl->have_keygrip)
return gpg_error (GPG_ERR_NO_SECKEY);
rc = agent_key_from_file (ctrl, ctrl->keygrip,
rc = agent_key_from_file (ctrl, desc_text, ctrl->keygrip,
&shadow_info, ignore_cache, &s_skey);
if (rc)
{