1 /* call-agent.c - Divert GPGSM operations to the agent
2 * Copyright (C) 2001, 2002, 2003, 2005, 2007,
3 * 2008, 2009, 2010 Free Software Foundation, Inc.
5 * This file is part of GnuPG.
7 * GnuPG is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
12 * GnuPG is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <https://www.gnu.org/licenses/>.
38 #include "keydb.h" /* fixme: Move this to import.c */
40 #include "shareddefs.h"
41 #include "passphrase.h"
44 static assuan_context_t agent_ctx = NULL;
51 const unsigned char *ciphertext;
59 const unsigned char *sexp;
71 struct import_key_parm_s
79 struct default_inq_parm_s
86 /* Print a warning if the server's version number is less than our
87 version number. Returns an error code on a connection problem. */
89 warn_version_mismatch (ctrl_t ctrl, assuan_context_t ctx,
90 const char *servername, int mode)
94 const char *myversion = strusage (13);
96 err = get_assuan_server_version (ctx, mode, &serverversion);
98 log_error (_("error getting version from '%s': %s\n"),
99 servername, gpg_strerror (err));
100 else if (compare_version_strings (serverversion, myversion) < 0)
104 warn = xtryasprintf (_("server '%s' is older than us (%s < %s)"),
105 servername, serverversion, myversion);
107 err = gpg_error_from_syserror ();
110 log_info (_("WARNING: %s\n"), warn);
111 gpgsm_status2 (ctrl, STATUS_WARNING, "server_version_mismatch 0",
116 xfree (serverversion);
121 /* Try to connect to the agent via socket or fork it off and work by
122 pipes. Handle the server's initial greeting */
124 start_agent (ctrl_t ctrl)
129 rc = 0; /* fixme: We need a context for each thread or
130 serialize the access to the agent (which is
131 suitable given that the agent is not MT. */
134 rc = start_new_gpg_agent (&agent_ctx,
135 GPG_ERR_SOURCE_DEFAULT,
137 opt.lc_ctype, opt.lc_messages,
139 opt.autostart, opt.verbose, DBG_IPC,
140 gpgsm_status2, ctrl);
142 if (!opt.autostart && gpg_err_code (rc) == GPG_ERR_NO_AGENT)
149 log_info (_("no gpg-agent running in this session\n"));
152 else if (!rc && !(rc = warn_version_mismatch (ctrl, agent_ctx,
155 /* Tell the agent that we support Pinentry notifications. No
156 error checking so that it will work also with older
158 assuan_transact (agent_ctx, "OPTION allow-pinentry-notify",
159 NULL, NULL, NULL, NULL, NULL, NULL);
161 /* Pass on the pinentry mode. */
162 if (opt.pinentry_mode)
164 char *tmp = xasprintf ("OPTION pinentry-mode=%s",
165 str_pinentry_mode (opt.pinentry_mode));
166 rc = assuan_transact (agent_ctx, tmp,
167 NULL, NULL, NULL, NULL, NULL, NULL);
170 log_error ("setting pinentry mode '%s' failed: %s\n",
171 str_pinentry_mode (opt.pinentry_mode),
177 if (!ctrl->agent_seen)
179 ctrl->agent_seen = 1;
180 audit_log_ok (ctrl->audit, AUDIT_AGENT_READY, rc);
186 /* This is the default inquiry callback. It mainly handles the
187 Pinentry notifications. */
189 default_inq_cb (void *opaque, const char *line)
192 struct default_inq_parm_s *parm = opaque;
193 ctrl_t ctrl = parm->ctrl;
195 if (has_leading_keyword (line, "PINENTRY_LAUNCHED"))
197 err = gpgsm_proxy_pinentry_notify (ctrl, line);
199 log_error (_("failed to proxy %s inquiry to client\n"),
200 "PINENTRY_LAUNCHED");
201 /* We do not pass errors to avoid breaking other code. */
203 else if ((has_leading_keyword (line, "PASSPHRASE")
204 || has_leading_keyword (line, "NEW_PASSPHRASE"))
205 && opt.pinentry_mode == PINENTRY_MODE_LOOPBACK
206 && have_static_passphrase ())
208 const char *s = get_static_passphrase ();
209 err = assuan_send_data (parm->ctx, s, strlen (s));
212 log_error ("ignoring gpg-agent inquiry '%s'\n", line);
220 /* Call the agent to do a sign operation using the key identified by
221 the hex string KEYGRIP. */
223 gpgsm_agent_pksign (ctrl_t ctrl, const char *keygrip, const char *desc,
224 unsigned char *digest, size_t digestlen, int digestalgo,
225 unsigned char **r_buf, size_t *r_buflen )
228 char *p, line[ASSUAN_LINELENGTH];
231 struct default_inq_parm_s inq_parm;
234 rc = start_agent (ctrl);
237 inq_parm.ctx = agent_ctx;
239 if (digestlen*2 + 50 > DIM(line))
240 return gpg_error (GPG_ERR_GENERAL);
242 rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
246 snprintf (line, DIM(line), "SIGKEY %s", keygrip);
247 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
253 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
254 rc = assuan_transact (agent_ctx, line,
255 NULL, NULL, NULL, NULL, NULL, NULL);
260 sprintf (line, "SETHASH %d ", digestalgo);
261 p = line + strlen (line);
262 for (i=0; i < digestlen ; i++, p += 2 )
263 sprintf (p, "%02X", digest[i]);
264 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
268 init_membuf (&data, 1024);
269 rc = assuan_transact (agent_ctx, "PKSIGN",
270 put_membuf_cb, &data, default_inq_cb, &inq_parm,
274 xfree (get_membuf (&data, &len));
277 *r_buf = get_membuf (&data, r_buflen);
279 if (!gcry_sexp_canon_len (*r_buf, *r_buflen, NULL, NULL))
281 xfree (*r_buf); *r_buf = NULL;
282 return gpg_error (GPG_ERR_INV_VALUE);
285 return *r_buf? 0 : out_of_core ();
289 /* Call the scdaemon to do a sign operation using the key identified by
290 the hex string KEYID. */
292 gpgsm_scd_pksign (ctrl_t ctrl, const char *keyid, const char *desc,
293 unsigned char *digest, size_t digestlen, int digestalgo,
294 unsigned char **r_buf, size_t *r_buflen )
297 char *p, line[ASSUAN_LINELENGTH];
301 unsigned char *sigbuf;
303 struct default_inq_parm_s inq_parm;
311 case GCRY_MD_SHA1: hashopt = "--hash=sha1"; break;
312 case GCRY_MD_RMD160:hashopt = "--hash=rmd160"; break;
313 case GCRY_MD_MD5: hashopt = "--hash=md5"; break;
314 case GCRY_MD_SHA256:hashopt = "--hash=sha256"; break;
316 return gpg_error (GPG_ERR_DIGEST_ALGO);
319 rc = start_agent (ctrl);
322 inq_parm.ctx = agent_ctx;
324 if (digestlen*2 + 50 > DIM(line))
325 return gpg_error (GPG_ERR_GENERAL);
327 p = stpcpy (line, "SCD SETDATA " );
328 for (i=0; i < digestlen ; i++, p += 2 )
329 sprintf (p, "%02X", digest[i]);
330 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
334 init_membuf (&data, 1024);
336 snprintf (line, DIM(line), "SCD PKSIGN %s %s", hashopt, keyid);
337 rc = assuan_transact (agent_ctx, line,
338 put_membuf_cb, &data, default_inq_cb, &inq_parm,
342 xfree (get_membuf (&data, &len));
345 sigbuf = get_membuf (&data, &sigbuflen);
347 /* Create an S-expression from it which is formatted like this:
348 "(7:sig-val(3:rsa(1:sSIGBUFLEN:SIGBUF)))" Fixme: If a card ever
349 creates non-RSA keys we need to change things. */
350 *r_buflen = 21 + 11 + sigbuflen + 4;
351 p = xtrymalloc (*r_buflen);
352 *r_buf = (unsigned char*)p;
358 p = stpcpy (p, "(7:sig-val(3:rsa(1:s" );
359 sprintf (p, "%u:", (unsigned int)sigbuflen);
361 memcpy (p, sigbuf, sigbuflen);
366 assert (gcry_sexp_canon_len (*r_buf, *r_buflen, NULL, NULL));
373 /* Handle a CIPHERTEXT inquiry. Note, we only send the data,
374 assuan_transact takes care of flushing and writing the end */
376 inq_ciphertext_cb (void *opaque, const char *line)
378 struct cipher_parm_s *parm = opaque;
381 if (has_leading_keyword (line, "CIPHERTEXT"))
383 assuan_begin_confidential (parm->ctx);
384 rc = assuan_send_data (parm->ctx, parm->ciphertext, parm->ciphertextlen);
385 assuan_end_confidential (parm->ctx);
389 struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
390 rc = default_inq_cb (&inq_parm, line);
397 /* Call the agent to do a decrypt operation using the key identified by
398 the hex string KEYGRIP. */
400 gpgsm_agent_pkdecrypt (ctrl_t ctrl, const char *keygrip, const char *desc,
401 ksba_const_sexp_t ciphertext,
402 char **r_buf, size_t *r_buflen )
405 char line[ASSUAN_LINELENGTH];
407 struct cipher_parm_s cipher_parm;
409 char *p, *buf, *endp;
410 size_t ciphertextlen;
412 if (!keygrip || strlen(keygrip) != 40 || !ciphertext || !r_buf || !r_buflen)
413 return gpg_error (GPG_ERR_INV_VALUE);
416 ciphertextlen = gcry_sexp_canon_len (ciphertext, 0, NULL, NULL);
418 return gpg_error (GPG_ERR_INV_VALUE);
420 rc = start_agent (ctrl);
424 rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
428 assert ( DIM(line) >= 50 );
429 snprintf (line, DIM(line), "SETKEY %s", keygrip);
430 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
436 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
437 rc = assuan_transact (agent_ctx, line,
438 NULL, NULL, NULL, NULL, NULL, NULL);
443 init_membuf (&data, 1024);
444 cipher_parm.ctrl = ctrl;
445 cipher_parm.ctx = agent_ctx;
446 cipher_parm.ciphertext = ciphertext;
447 cipher_parm.ciphertextlen = ciphertextlen;
448 rc = assuan_transact (agent_ctx, "PKDECRYPT",
449 put_membuf_cb, &data,
450 inq_ciphertext_cb, &cipher_parm, NULL, NULL);
453 xfree (get_membuf (&data, &len));
457 put_membuf (&data, "", 1); /* Make sure it is 0 terminated. */
458 buf = get_membuf (&data, &len);
460 return gpg_error (GPG_ERR_ENOMEM);
461 assert (len); /* (we forced Nul termination.) */
465 if (len < 13 || memcmp (buf, "(5:value", 8) ) /* "(5:valueN:D)\0" */
466 return gpg_error (GPG_ERR_INV_SEXP);
467 len -= 11; /* Count only the data of the second part. */
468 p = buf + 8; /* Skip leading parenthesis and the value tag. */
472 /* For compatibility with older gpg-agents handle the old style
473 incomplete S-exps. */
474 len--; /* Do not count the Nul. */
478 n = strtoul (p, &endp, 10);
479 if (!n || *endp != ':')
480 return gpg_error (GPG_ERR_INV_SEXP);
483 return gpg_error (GPG_ERR_INV_SEXP); /* Oops: Inconsistent S-Exp. */
485 memmove (buf, endp, n);
496 /* Handle a KEYPARMS inquiry. Note, we only send the data,
497 assuan_transact takes care of flushing and writing the end */
499 inq_genkey_parms (void *opaque, const char *line)
501 struct genkey_parm_s *parm = opaque;
504 if (has_leading_keyword (line, "KEYPARAM"))
506 rc = assuan_send_data (parm->ctx, parm->sexp, parm->sexplen);
510 struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
511 rc = default_inq_cb (&inq_parm, line);
519 /* Call the agent to generate a newkey */
521 gpgsm_agent_genkey (ctrl_t ctrl,
522 ksba_const_sexp_t keyparms, ksba_sexp_t *r_pubkey)
525 struct genkey_parm_s gk_parm;
531 rc = start_agent (ctrl);
535 rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
539 init_membuf (&data, 1024);
541 gk_parm.ctx = agent_ctx;
542 gk_parm.sexp = keyparms;
543 gk_parm.sexplen = gcry_sexp_canon_len (keyparms, 0, NULL, NULL);
544 if (!gk_parm.sexplen)
545 return gpg_error (GPG_ERR_INV_VALUE);
546 rc = assuan_transact (agent_ctx, "GENKEY",
547 put_membuf_cb, &data,
548 inq_genkey_parms, &gk_parm, NULL, NULL);
551 xfree (get_membuf (&data, &len));
554 buf = get_membuf (&data, &len);
556 return gpg_error (GPG_ERR_ENOMEM);
557 if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
560 return gpg_error (GPG_ERR_INV_SEXP);
567 /* Call the agent to read the public key part for a given keygrip. If
568 FROMCARD is true, the key is directly read from the current
569 smartcard. In this case HEXKEYGRIP should be the keyID
572 gpgsm_agent_readkey (ctrl_t ctrl, int fromcard, const char *hexkeygrip,
573 ksba_sexp_t *r_pubkey)
579 char line[ASSUAN_LINELENGTH];
580 struct default_inq_parm_s inq_parm;
583 rc = start_agent (ctrl);
586 inq_parm.ctx = agent_ctx;
588 rc = assuan_transact (agent_ctx, "RESET",NULL, NULL, NULL, NULL, NULL, NULL);
592 snprintf (line, DIM(line), "%sREADKEY %s",
593 fromcard? "SCD ":"", hexkeygrip);
595 init_membuf (&data, 1024);
596 rc = assuan_transact (agent_ctx, line,
597 put_membuf_cb, &data,
598 default_inq_cb, &inq_parm, NULL, NULL);
601 xfree (get_membuf (&data, &len));
604 buf = get_membuf (&data, &len);
606 return gpg_error (GPG_ERR_ENOMEM);
607 if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
610 return gpg_error (GPG_ERR_INV_SEXP);
618 /* Take the serial number from LINE and return it verbatim in a newly
619 allocated string. We make sure that only hex characters are
622 store_serialno (const char *line)
627 for (s=line; hexdigitp (s); s++)
629 p = xtrymalloc (s + 1 - line);
632 memcpy (p, line, s-line);
639 /* Callback for the gpgsm_agent_serialno function. */
641 scd_serialno_status_cb (void *opaque, const char *line)
643 char **r_serialno = opaque;
644 const char *keyword = line;
647 for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
649 while (spacep (line))
652 if (keywordlen == 8 && !memcmp (keyword, "SERIALNO", keywordlen))
655 *r_serialno = store_serialno (line);
662 /* Call the agent to read the serial number of the current card. */
664 gpgsm_agent_scd_serialno (ctrl_t ctrl, char **r_serialno)
667 char *serialno = NULL;
668 struct default_inq_parm_s inq_parm;
671 rc = start_agent (ctrl);
674 inq_parm.ctrl = ctrl;
675 inq_parm.ctx = agent_ctx;
677 rc = assuan_transact (agent_ctx, "SCD SERIALNO",
679 default_inq_cb, &inq_parm,
680 scd_serialno_status_cb, &serialno);
681 if (!rc && !serialno)
682 rc = gpg_error (GPG_ERR_INTERNAL);
688 *r_serialno = serialno;
694 /* Callback for the gpgsm_agent_serialno function. */
696 scd_keypairinfo_status_cb (void *opaque, const char *line)
698 strlist_t *listaddr = opaque;
699 const char *keyword = line;
704 for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
706 while (spacep (line))
709 if (keywordlen == 11 && !memcmp (keyword, "KEYPAIRINFO", keywordlen))
711 sl = append_to_strlist (listaddr, line);
713 /* Make sure that we only have two tokes so that future
714 extensions of the format won't change the format expected by
716 while (*p && !spacep (p))
722 while (*p && !spacep (p))
732 /* Call the agent to read the keypairinfo lines of the current card.
733 The list is returned as a string made up of the keygrip, a space
736 gpgsm_agent_scd_keypairinfo (ctrl_t ctrl, strlist_t *r_list)
739 strlist_t list = NULL;
740 struct default_inq_parm_s inq_parm;
743 rc = start_agent (ctrl);
746 inq_parm.ctrl = ctrl;
747 inq_parm.ctx = agent_ctx;
749 rc = assuan_transact (agent_ctx, "SCD LEARN --force",
751 default_inq_cb, &inq_parm,
752 scd_keypairinfo_status_cb, &list);
754 rc = gpg_error (GPG_ERR_NO_DATA);
767 istrusted_status_cb (void *opaque, const char *line)
769 struct rootca_flags_s *flags = opaque;
772 if ((s = has_leading_keyword (line, "TRUSTLISTFLAG")))
775 if (has_leading_keyword (line, "relax"))
777 else if (has_leading_keyword (line, "cm"))
778 flags->chain_model = 1;
785 /* Ask the agent whether the certificate is in the list of trusted
786 keys. The certificate is either specified by the CERT object or by
787 the fingerprint HEXFPR. ROOTCA_FLAGS is guaranteed to be cleared
790 gpgsm_agent_istrusted (ctrl_t ctrl, ksba_cert_t cert, const char *hexfpr,
791 struct rootca_flags_s *rootca_flags)
794 char line[ASSUAN_LINELENGTH];
796 memset (rootca_flags, 0, sizeof *rootca_flags);
799 return gpg_error (GPG_ERR_INV_ARG);
801 rc = start_agent (ctrl);
807 snprintf (line, DIM(line), "ISTRUSTED %s", hexfpr);
813 fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
816 log_error ("error getting the fingerprint\n");
817 return gpg_error (GPG_ERR_GENERAL);
820 snprintf (line, DIM(line), "ISTRUSTED %s", fpr);
824 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL,
825 istrusted_status_cb, rootca_flags);
827 rootca_flags->valid = 1;
831 /* Ask the agent to mark CERT as a trusted Root-CA one */
833 gpgsm_agent_marktrusted (ctrl_t ctrl, ksba_cert_t cert)
836 char *fpr, *dn, *dnfmt;
837 char line[ASSUAN_LINELENGTH];
838 struct default_inq_parm_s inq_parm;
840 rc = start_agent (ctrl);
843 inq_parm.ctrl = ctrl;
844 inq_parm.ctx = agent_ctx;
846 fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
849 log_error ("error getting the fingerprint\n");
850 return gpg_error (GPG_ERR_GENERAL);
853 dn = ksba_cert_get_issuer (cert, 0);
857 return gpg_error (GPG_ERR_GENERAL);
859 dnfmt = gpgsm_format_name2 (dn, 0);
862 return gpg_error_from_syserror ();
863 snprintf (line, DIM(line), "MARKTRUSTED %s S %s", fpr, dnfmt);
867 rc = assuan_transact (agent_ctx, line, NULL, NULL,
868 default_inq_cb, &inq_parm, NULL, NULL);
874 /* Ask the agent whether the a corresponding secret key is available
875 for the given keygrip */
877 gpgsm_agent_havekey (ctrl_t ctrl, const char *hexkeygrip)
880 char line[ASSUAN_LINELENGTH];
882 rc = start_agent (ctrl);
886 if (!hexkeygrip || strlen (hexkeygrip) != 40)
887 return gpg_error (GPG_ERR_INV_VALUE);
889 snprintf (line, DIM(line), "HAVEKEY %s", hexkeygrip);
891 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
897 learn_status_cb (void *opaque, const char *line)
899 struct learn_parm_s *parm = opaque;
902 /* Pass progress data to the caller. */
903 if ((s = has_leading_keyword (line, "PROGRESS")))
908 if (gpgsm_status (parm->ctrl, STATUS_PROGRESS, line))
909 return gpg_error (GPG_ERR_ASS_CANCELED);
916 learn_cb (void *opaque, const void *buffer, size_t length)
918 struct learn_parm_s *parm = opaque;
929 put_membuf (parm->data, buffer, length);
932 /* END encountered - process what we have */
933 buf = get_membuf (parm->data, &len);
936 parm->error = gpg_error (GPG_ERR_ENOMEM);
940 if (gpgsm_status (parm->ctrl, STATUS_PROGRESS, "learncard C 0 0"))
941 return gpg_error (GPG_ERR_ASS_CANCELED);
943 /* FIXME: this should go into import.c */
944 rc = ksba_cert_new (&cert);
950 rc = ksba_cert_init_from_mem (cert, buf, len);
953 log_error ("failed to parse a certificate: %s\n", gpg_strerror (rc));
954 ksba_cert_release (cert);
959 /* We do not store a certifciate with missing issuers as ephemeral
960 because we can assume that the --learn-card command has been used
962 rc = gpgsm_basic_cert_check (parm->ctrl, cert);
963 if (rc && gpg_err_code (rc) != GPG_ERR_MISSING_CERT
964 && gpg_err_code (rc) != GPG_ERR_MISSING_ISSUER_CERT)
965 log_error ("invalid certificate: %s\n", gpg_strerror (rc));
970 if (!keydb_store_cert (parm->ctrl, cert, 0, &existed))
972 if (opt.verbose > 1 && existed)
973 log_info ("certificate already in DB\n");
974 else if (opt.verbose && !existed)
975 log_info ("certificate imported\n");
979 ksba_cert_release (cert);
980 init_membuf (parm->data, 4096);
984 /* Call the agent to learn about a smartcard */
986 gpgsm_agent_learn (ctrl_t ctrl)
989 struct learn_parm_s learn_parm;
993 rc = start_agent (ctrl);
997 rc = warn_version_mismatch (ctrl, agent_ctx, SCDAEMON_NAME, 2);
1001 init_membuf (&data, 4096);
1002 learn_parm.error = 0;
1003 learn_parm.ctrl = ctrl;
1004 learn_parm.ctx = agent_ctx;
1005 learn_parm.data = &data;
1006 rc = assuan_transact (agent_ctx, "LEARN --send",
1007 learn_cb, &learn_parm,
1009 learn_status_cb, &learn_parm);
1010 xfree (get_membuf (&data, &len));
1013 return learn_parm.error;
1017 /* Ask the agent to change the passphrase of the key identified by
1018 HEXKEYGRIP. If DESC is not NULL, display instead of the default
1019 description message. */
1021 gpgsm_agent_passwd (ctrl_t ctrl, const char *hexkeygrip, const char *desc)
1024 char line[ASSUAN_LINELENGTH];
1025 struct default_inq_parm_s inq_parm;
1027 rc = start_agent (ctrl);
1030 inq_parm.ctrl = ctrl;
1031 inq_parm.ctx = agent_ctx;
1033 if (!hexkeygrip || strlen (hexkeygrip) != 40)
1034 return gpg_error (GPG_ERR_INV_VALUE);
1038 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
1039 rc = assuan_transact (agent_ctx, line,
1040 NULL, NULL, NULL, NULL, NULL, NULL);
1045 snprintf (line, DIM(line), "PASSWD %s", hexkeygrip);
1047 rc = assuan_transact (agent_ctx, line, NULL, NULL,
1048 default_inq_cb, &inq_parm, NULL, NULL);
1054 /* Ask the agent to pop up a confirmation dialog with the text DESC
1055 and an okay and cancel button. */
1057 gpgsm_agent_get_confirmation (ctrl_t ctrl, const char *desc)
1060 char line[ASSUAN_LINELENGTH];
1061 struct default_inq_parm_s inq_parm;
1063 rc = start_agent (ctrl);
1066 inq_parm.ctrl = ctrl;
1067 inq_parm.ctx = agent_ctx;
1069 snprintf (line, DIM(line), "GET_CONFIRMATION %s", desc);
1071 rc = assuan_transact (agent_ctx, line, NULL, NULL,
1072 default_inq_cb, &inq_parm, NULL, NULL);
1078 /* Return 0 if the agent is alive. This is useful to make sure that
1079 an agent has been started. */
1081 gpgsm_agent_send_nop (ctrl_t ctrl)
1085 rc = start_agent (ctrl);
1087 rc = assuan_transact (agent_ctx, "NOP",
1088 NULL, NULL, NULL, NULL, NULL, NULL);
1095 keyinfo_status_cb (void *opaque, const char *line)
1097 char **serialno = opaque;
1100 if ((s = has_leading_keyword (line, "KEYINFO")) && !*serialno)
1102 s = strchr (s, ' ');
1103 if (s && s[1] == 'T' && s[2] == ' ' && s[3])
1106 s2 = strchr (s, ' ');
1109 *serialno = xtrymalloc ((s2 - s)+1);
1112 memcpy (*serialno, s, s2 - s);
1113 (*serialno)[s2 - s] = 0;
1121 /* Return the serial number for a secret key. If the returned serial
1122 number is NULL, the key is not stored on a smartcard. Caller needs
1123 to free R_SERIALNO. */
1125 gpgsm_agent_keyinfo (ctrl_t ctrl, const char *hexkeygrip, char **r_serialno)
1128 char line[ASSUAN_LINELENGTH];
1129 char *serialno = NULL;
1133 err = start_agent (ctrl);
1137 if (!hexkeygrip || strlen (hexkeygrip) != 40)
1138 return gpg_error (GPG_ERR_INV_VALUE);
1140 snprintf (line, DIM(line), "KEYINFO %s", hexkeygrip);
1142 err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL,
1143 keyinfo_status_cb, &serialno);
1144 if (!err && serialno)
1146 /* Sanity check for bad characters. */
1147 if (strpbrk (serialno, ":\n\r"))
1148 err = GPG_ERR_INV_VALUE;
1153 *r_serialno = serialno;
1159 /* Ask for the passphrase (this is used for pkcs#12 import/export. On
1160 success the caller needs to free the string stored at R_PASSPHRASE.
1161 On error NULL will be stored at R_PASSPHRASE and an appropriate
1162 error code returned. If REPEAT is true the agent tries to get a
1163 new passphrase (i.e. asks the user to confirm it). */
1165 gpgsm_agent_ask_passphrase (ctrl_t ctrl, const char *desc_msg, int repeat,
1166 char **r_passphrase)
1169 char line[ASSUAN_LINELENGTH];
1172 struct default_inq_parm_s inq_parm;
1174 *r_passphrase = NULL;
1176 err = start_agent (ctrl);
1179 inq_parm.ctrl = ctrl;
1180 inq_parm.ctx = agent_ctx;
1182 if (desc_msg && *desc_msg && !(arg4 = percent_plus_escape (desc_msg)))
1183 return gpg_error_from_syserror ();
1185 snprintf (line, DIM(line), "GET_PASSPHRASE --data%s -- X X X %s",
1186 repeat? " --repeat=1 --check --qualitybar":"",
1190 init_membuf_secure (&data, 64);
1191 err = assuan_transact (agent_ctx, line,
1192 put_membuf_cb, &data,
1193 default_inq_cb, &inq_parm, NULL, NULL);
1196 xfree (get_membuf (&data, NULL));
1199 put_membuf (&data, "", 1);
1200 *r_passphrase = get_membuf (&data, NULL);
1202 err = gpg_error_from_syserror ();
1209 /* Retrieve a key encryption key from the agent. With FOREXPORT true
1210 the key shall be use for export, with false for import. On success
1211 the new key is stored at R_KEY and its length at R_KEKLEN. */
1213 gpgsm_agent_keywrap_key (ctrl_t ctrl, int forexport,
1214 void **r_kek, size_t *r_keklen)
1220 char line[ASSUAN_LINELENGTH];
1221 struct default_inq_parm_s inq_parm;
1224 err = start_agent (ctrl);
1227 inq_parm.ctrl = ctrl;
1228 inq_parm.ctx = agent_ctx;
1230 snprintf (line, DIM(line), "KEYWRAP_KEY %s",
1231 forexport? "--export":"--import");
1233 init_membuf_secure (&data, 64);
1234 err = assuan_transact (agent_ctx, line,
1235 put_membuf_cb, &data,
1236 default_inq_cb, &inq_parm, NULL, NULL);
1239 xfree (get_membuf (&data, &len));
1242 buf = get_membuf (&data, &len);
1244 return gpg_error_from_syserror ();
1253 /* Handle the inquiry for an IMPORT_KEY command. */
1255 inq_import_key_parms (void *opaque, const char *line)
1257 struct import_key_parm_s *parm = opaque;
1260 if (has_leading_keyword (line, "KEYDATA"))
1262 assuan_begin_confidential (parm->ctx);
1263 err = assuan_send_data (parm->ctx, parm->key, parm->keylen);
1264 assuan_end_confidential (parm->ctx);
1268 struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
1269 err = default_inq_cb (&inq_parm, line);
1276 /* Call the agent to import a key into the agent. */
1278 gpgsm_agent_import_key (ctrl_t ctrl, const void *key, size_t keylen)
1281 struct import_key_parm_s parm;
1283 err = start_agent (ctrl);
1288 parm.ctx = agent_ctx;
1290 parm.keylen = keylen;
1292 err = assuan_transact (agent_ctx, "IMPORT_KEY",
1293 NULL, NULL, inq_import_key_parms, &parm, NULL, NULL);
1299 /* Receive a secret key from the agent. KEYGRIP is the hexified
1300 keygrip, DESC a prompt to be displayed with the agent's passphrase
1301 question (needs to be plus+percent escaped). On success the key is
1302 stored as a canonical S-expression at R_RESULT and R_RESULTLEN. */
1304 gpgsm_agent_export_key (ctrl_t ctrl, const char *keygrip, const char *desc,
1305 unsigned char **r_result, size_t *r_resultlen)
1311 char line[ASSUAN_LINELENGTH];
1312 struct default_inq_parm_s inq_parm;
1316 err = start_agent (ctrl);
1319 inq_parm.ctrl = ctrl;
1320 inq_parm.ctx = agent_ctx;
1324 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
1325 err = assuan_transact (agent_ctx, line,
1326 NULL, NULL, NULL, NULL, NULL, NULL);
1331 snprintf (line, DIM(line), "EXPORT_KEY %s", keygrip);
1333 init_membuf_secure (&data, 1024);
1334 err = assuan_transact (agent_ctx, line,
1335 put_membuf_cb, &data,
1336 default_inq_cb, &inq_parm, NULL, NULL);
1339 xfree (get_membuf (&data, &len));
1342 buf = get_membuf (&data, &len);
1344 return gpg_error_from_syserror ();