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/>.
36 #include "../common/i18n.h"
37 #include "../common/asshelp.h"
38 #include "keydb.h" /* fixme: Move this to import.c */
39 #include "../common/membuf.h"
40 #include "../common/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),
175 /* In DE_VS mode under Windows we require that the JENT RNG
177 #ifdef HAVE_W32_SYSTEM
178 if (!rc && opt.compliance == CO_DE_VS)
180 if (assuan_transact (agent_ctx, "GETINFO jent_active",
181 NULL, NULL, NULL, NULL, NULL, NULL))
183 rc = gpg_error (GPG_ERR_FORBIDDEN);
184 log_error (_("%s is not compliant with %s mode\n"),
186 gnupg_compliance_option_string (opt.compliance));
187 gpgsm_status_with_error (ctrl, STATUS_ERROR,
188 "random-compliance", rc);
191 #endif /*HAVE_W32_SYSTEM*/
196 if (!ctrl->agent_seen)
198 ctrl->agent_seen = 1;
199 audit_log_ok (ctrl->audit, AUDIT_AGENT_READY, rc);
205 /* This is the default inquiry callback. It mainly handles the
206 Pinentry notifications. */
208 default_inq_cb (void *opaque, const char *line)
211 struct default_inq_parm_s *parm = opaque;
212 ctrl_t ctrl = parm->ctrl;
214 if (has_leading_keyword (line, "PINENTRY_LAUNCHED"))
216 err = gpgsm_proxy_pinentry_notify (ctrl, line);
218 log_error (_("failed to proxy %s inquiry to client\n"),
219 "PINENTRY_LAUNCHED");
220 /* We do not pass errors to avoid breaking other code. */
222 else if ((has_leading_keyword (line, "PASSPHRASE")
223 || has_leading_keyword (line, "NEW_PASSPHRASE"))
224 && opt.pinentry_mode == PINENTRY_MODE_LOOPBACK
225 && have_static_passphrase ())
227 const char *s = get_static_passphrase ();
228 err = assuan_send_data (parm->ctx, s, strlen (s));
231 log_error ("ignoring gpg-agent inquiry '%s'\n", line);
239 /* Call the agent to do a sign operation using the key identified by
240 the hex string KEYGRIP. */
242 gpgsm_agent_pksign (ctrl_t ctrl, const char *keygrip, const char *desc,
243 unsigned char *digest, size_t digestlen, int digestalgo,
244 unsigned char **r_buf, size_t *r_buflen )
247 char *p, line[ASSUAN_LINELENGTH];
250 struct default_inq_parm_s inq_parm;
253 rc = start_agent (ctrl);
256 inq_parm.ctrl = ctrl;
257 inq_parm.ctx = agent_ctx;
259 if (digestlen*2 + 50 > DIM(line))
260 return gpg_error (GPG_ERR_GENERAL);
262 rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
266 snprintf (line, DIM(line), "SIGKEY %s", keygrip);
267 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
273 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
274 rc = assuan_transact (agent_ctx, line,
275 NULL, NULL, NULL, NULL, NULL, NULL);
280 sprintf (line, "SETHASH %d ", digestalgo);
281 p = line + strlen (line);
282 for (i=0; i < digestlen ; i++, p += 2 )
283 sprintf (p, "%02X", digest[i]);
284 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
288 init_membuf (&data, 1024);
289 rc = assuan_transact (agent_ctx, "PKSIGN",
290 put_membuf_cb, &data, default_inq_cb, &inq_parm,
294 xfree (get_membuf (&data, &len));
297 *r_buf = get_membuf (&data, r_buflen);
299 if (!gcry_sexp_canon_len (*r_buf, *r_buflen, NULL, NULL))
301 xfree (*r_buf); *r_buf = NULL;
302 return gpg_error (GPG_ERR_INV_VALUE);
305 return *r_buf? 0 : out_of_core ();
309 /* Call the scdaemon to do a sign operation using the key identified by
310 the hex string KEYID. */
312 gpgsm_scd_pksign (ctrl_t ctrl, const char *keyid, const char *desc,
313 unsigned char *digest, size_t digestlen, int digestalgo,
314 unsigned char **r_buf, size_t *r_buflen )
317 char *p, line[ASSUAN_LINELENGTH];
321 unsigned char *sigbuf;
323 struct default_inq_parm_s inq_parm;
331 case GCRY_MD_SHA1: hashopt = "--hash=sha1"; break;
332 case GCRY_MD_RMD160:hashopt = "--hash=rmd160"; break;
333 case GCRY_MD_MD5: hashopt = "--hash=md5"; break;
334 case GCRY_MD_SHA256:hashopt = "--hash=sha256"; break;
336 return gpg_error (GPG_ERR_DIGEST_ALGO);
339 rc = start_agent (ctrl);
342 inq_parm.ctrl = ctrl;
343 inq_parm.ctx = agent_ctx;
345 if (digestlen*2 + 50 > DIM(line))
346 return gpg_error (GPG_ERR_GENERAL);
348 p = stpcpy (line, "SCD SETDATA " );
349 for (i=0; i < digestlen ; i++, p += 2 )
350 sprintf (p, "%02X", digest[i]);
351 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
355 init_membuf (&data, 1024);
357 snprintf (line, DIM(line), "SCD PKSIGN %s %s", hashopt, keyid);
358 rc = assuan_transact (agent_ctx, line,
359 put_membuf_cb, &data, default_inq_cb, &inq_parm,
363 xfree (get_membuf (&data, &len));
366 sigbuf = get_membuf (&data, &sigbuflen);
368 /* Create an S-expression from it which is formatted like this:
369 "(7:sig-val(3:rsa(1:sSIGBUFLEN:SIGBUF)))" Fixme: If a card ever
370 creates non-RSA keys we need to change things. */
371 *r_buflen = 21 + 11 + sigbuflen + 4;
372 p = xtrymalloc (*r_buflen);
373 *r_buf = (unsigned char*)p;
379 p = stpcpy (p, "(7:sig-val(3:rsa(1:s" );
380 sprintf (p, "%u:", (unsigned int)sigbuflen);
382 memcpy (p, sigbuf, sigbuflen);
387 assert (gcry_sexp_canon_len (*r_buf, *r_buflen, NULL, NULL));
394 /* Handle a CIPHERTEXT inquiry. Note, we only send the data,
395 assuan_transact takes care of flushing and writing the end */
397 inq_ciphertext_cb (void *opaque, const char *line)
399 struct cipher_parm_s *parm = opaque;
402 if (has_leading_keyword (line, "CIPHERTEXT"))
404 assuan_begin_confidential (parm->ctx);
405 rc = assuan_send_data (parm->ctx, parm->ciphertext, parm->ciphertextlen);
406 assuan_end_confidential (parm->ctx);
410 struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
411 rc = default_inq_cb (&inq_parm, line);
418 /* Call the agent to do a decrypt operation using the key identified by
419 the hex string KEYGRIP. */
421 gpgsm_agent_pkdecrypt (ctrl_t ctrl, const char *keygrip, const char *desc,
422 ksba_const_sexp_t ciphertext,
423 char **r_buf, size_t *r_buflen )
426 char line[ASSUAN_LINELENGTH];
428 struct cipher_parm_s cipher_parm;
430 char *p, *buf, *endp;
431 size_t ciphertextlen;
433 if (!keygrip || strlen(keygrip) != 40 || !ciphertext || !r_buf || !r_buflen)
434 return gpg_error (GPG_ERR_INV_VALUE);
437 ciphertextlen = gcry_sexp_canon_len (ciphertext, 0, NULL, NULL);
439 return gpg_error (GPG_ERR_INV_VALUE);
441 rc = start_agent (ctrl);
445 rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
449 assert ( DIM(line) >= 50 );
450 snprintf (line, DIM(line), "SETKEY %s", keygrip);
451 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
457 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
458 rc = assuan_transact (agent_ctx, line,
459 NULL, NULL, NULL, NULL, NULL, NULL);
464 init_membuf (&data, 1024);
465 cipher_parm.ctrl = ctrl;
466 cipher_parm.ctx = agent_ctx;
467 cipher_parm.ciphertext = ciphertext;
468 cipher_parm.ciphertextlen = ciphertextlen;
469 rc = assuan_transact (agent_ctx, "PKDECRYPT",
470 put_membuf_cb, &data,
471 inq_ciphertext_cb, &cipher_parm, NULL, NULL);
474 xfree (get_membuf (&data, &len));
478 put_membuf (&data, "", 1); /* Make sure it is 0 terminated. */
479 buf = get_membuf (&data, &len);
481 return gpg_error (GPG_ERR_ENOMEM);
482 assert (len); /* (we forced Nul termination.) */
486 if (len < 13 || memcmp (buf, "(5:value", 8) ) /* "(5:valueN:D)\0" */
487 return gpg_error (GPG_ERR_INV_SEXP);
488 len -= 11; /* Count only the data of the second part. */
489 p = buf + 8; /* Skip leading parenthesis and the value tag. */
493 /* For compatibility with older gpg-agents handle the old style
494 incomplete S-exps. */
495 len--; /* Do not count the Nul. */
499 n = strtoul (p, &endp, 10);
500 if (!n || *endp != ':')
501 return gpg_error (GPG_ERR_INV_SEXP);
504 return gpg_error (GPG_ERR_INV_SEXP); /* Oops: Inconsistent S-Exp. */
506 memmove (buf, endp, n);
517 /* Handle a KEYPARMS inquiry. Note, we only send the data,
518 assuan_transact takes care of flushing and writing the end */
520 inq_genkey_parms (void *opaque, const char *line)
522 struct genkey_parm_s *parm = opaque;
525 if (has_leading_keyword (line, "KEYPARAM"))
527 rc = assuan_send_data (parm->ctx, parm->sexp, parm->sexplen);
531 struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
532 rc = default_inq_cb (&inq_parm, line);
540 /* Call the agent to generate a newkey */
542 gpgsm_agent_genkey (ctrl_t ctrl,
543 ksba_const_sexp_t keyparms, ksba_sexp_t *r_pubkey)
546 struct genkey_parm_s gk_parm;
552 rc = start_agent (ctrl);
556 rc = assuan_transact (agent_ctx, "RESET", NULL, NULL, NULL, NULL, NULL, NULL);
560 init_membuf (&data, 1024);
562 gk_parm.ctx = agent_ctx;
563 gk_parm.sexp = keyparms;
564 gk_parm.sexplen = gcry_sexp_canon_len (keyparms, 0, NULL, NULL);
565 if (!gk_parm.sexplen)
566 return gpg_error (GPG_ERR_INV_VALUE);
567 rc = assuan_transact (agent_ctx, "GENKEY",
568 put_membuf_cb, &data,
569 inq_genkey_parms, &gk_parm, NULL, NULL);
572 xfree (get_membuf (&data, &len));
575 buf = get_membuf (&data, &len);
577 return gpg_error (GPG_ERR_ENOMEM);
578 if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
581 return gpg_error (GPG_ERR_INV_SEXP);
588 /* Call the agent to read the public key part for a given keygrip. If
589 FROMCARD is true, the key is directly read from the current
590 smartcard. In this case HEXKEYGRIP should be the keyID
593 gpgsm_agent_readkey (ctrl_t ctrl, int fromcard, const char *hexkeygrip,
594 ksba_sexp_t *r_pubkey)
600 char line[ASSUAN_LINELENGTH];
601 struct default_inq_parm_s inq_parm;
604 rc = start_agent (ctrl);
607 inq_parm.ctrl = ctrl;
608 inq_parm.ctx = agent_ctx;
610 rc = assuan_transact (agent_ctx, "RESET",NULL, NULL, NULL, NULL, NULL, NULL);
614 snprintf (line, DIM(line), "%sREADKEY %s",
615 fromcard? "SCD ":"", hexkeygrip);
617 init_membuf (&data, 1024);
618 rc = assuan_transact (agent_ctx, line,
619 put_membuf_cb, &data,
620 default_inq_cb, &inq_parm, NULL, NULL);
623 xfree (get_membuf (&data, &len));
626 buf = get_membuf (&data, &len);
628 return gpg_error (GPG_ERR_ENOMEM);
629 if (!gcry_sexp_canon_len (buf, len, NULL, NULL))
632 return gpg_error (GPG_ERR_INV_SEXP);
640 /* Take the serial number from LINE and return it verbatim in a newly
641 allocated string. We make sure that only hex characters are
644 store_serialno (const char *line)
649 for (s=line; hexdigitp (s); s++)
651 p = xtrymalloc (s + 1 - line);
654 memcpy (p, line, s-line);
661 /* Callback for the gpgsm_agent_serialno function. */
663 scd_serialno_status_cb (void *opaque, const char *line)
665 char **r_serialno = opaque;
666 const char *keyword = line;
669 for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
671 while (spacep (line))
674 if (keywordlen == 8 && !memcmp (keyword, "SERIALNO", keywordlen))
677 *r_serialno = store_serialno (line);
684 /* Call the agent to read the serial number of the current card. */
686 gpgsm_agent_scd_serialno (ctrl_t ctrl, char **r_serialno)
689 char *serialno = NULL;
690 struct default_inq_parm_s inq_parm;
693 rc = start_agent (ctrl);
696 inq_parm.ctrl = ctrl;
697 inq_parm.ctx = agent_ctx;
699 rc = assuan_transact (agent_ctx, "SCD SERIALNO",
701 default_inq_cb, &inq_parm,
702 scd_serialno_status_cb, &serialno);
703 if (!rc && !serialno)
704 rc = gpg_error (GPG_ERR_INTERNAL);
710 *r_serialno = serialno;
716 /* Callback for the gpgsm_agent_serialno function. */
718 scd_keypairinfo_status_cb (void *opaque, const char *line)
720 strlist_t *listaddr = opaque;
721 const char *keyword = line;
726 for (keywordlen=0; *line && !spacep (line); line++, keywordlen++)
728 while (spacep (line))
731 if (keywordlen == 11 && !memcmp (keyword, "KEYPAIRINFO", keywordlen))
733 sl = append_to_strlist (listaddr, line);
735 /* Make sure that we only have two tokes so that future
736 extensions of the format won't change the format expected by
738 while (*p && !spacep (p))
744 while (*p && !spacep (p))
754 /* Call the agent to read the keypairinfo lines of the current card.
755 The list is returned as a string made up of the keygrip, a space
758 gpgsm_agent_scd_keypairinfo (ctrl_t ctrl, strlist_t *r_list)
761 strlist_t list = NULL;
762 struct default_inq_parm_s inq_parm;
765 rc = start_agent (ctrl);
768 inq_parm.ctrl = ctrl;
769 inq_parm.ctx = agent_ctx;
771 rc = assuan_transact (agent_ctx, "SCD LEARN --force",
773 default_inq_cb, &inq_parm,
774 scd_keypairinfo_status_cb, &list);
776 rc = gpg_error (GPG_ERR_NO_DATA);
789 istrusted_status_cb (void *opaque, const char *line)
791 struct rootca_flags_s *flags = opaque;
794 if ((s = has_leading_keyword (line, "TRUSTLISTFLAG")))
797 if (has_leading_keyword (line, "relax"))
799 else if (has_leading_keyword (line, "cm"))
800 flags->chain_model = 1;
807 /* Ask the agent whether the certificate is in the list of trusted
808 keys. The certificate is either specified by the CERT object or by
809 the fingerprint HEXFPR. ROOTCA_FLAGS is guaranteed to be cleared
812 gpgsm_agent_istrusted (ctrl_t ctrl, ksba_cert_t cert, const char *hexfpr,
813 struct rootca_flags_s *rootca_flags)
816 char line[ASSUAN_LINELENGTH];
818 memset (rootca_flags, 0, sizeof *rootca_flags);
821 return gpg_error (GPG_ERR_INV_ARG);
823 rc = start_agent (ctrl);
829 snprintf (line, DIM(line), "ISTRUSTED %s", hexfpr);
835 fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
838 log_error ("error getting the fingerprint\n");
839 return gpg_error (GPG_ERR_GENERAL);
842 snprintf (line, DIM(line), "ISTRUSTED %s", fpr);
846 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL,
847 istrusted_status_cb, rootca_flags);
849 rootca_flags->valid = 1;
853 /* Ask the agent to mark CERT as a trusted Root-CA one */
855 gpgsm_agent_marktrusted (ctrl_t ctrl, ksba_cert_t cert)
858 char *fpr, *dn, *dnfmt;
859 char line[ASSUAN_LINELENGTH];
860 struct default_inq_parm_s inq_parm;
862 rc = start_agent (ctrl);
865 inq_parm.ctrl = ctrl;
866 inq_parm.ctx = agent_ctx;
868 fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
871 log_error ("error getting the fingerprint\n");
872 return gpg_error (GPG_ERR_GENERAL);
875 dn = ksba_cert_get_issuer (cert, 0);
879 return gpg_error (GPG_ERR_GENERAL);
881 dnfmt = gpgsm_format_name2 (dn, 0);
884 return gpg_error_from_syserror ();
885 snprintf (line, DIM(line), "MARKTRUSTED %s S %s", fpr, dnfmt);
889 rc = assuan_transact (agent_ctx, line, NULL, NULL,
890 default_inq_cb, &inq_parm, NULL, NULL);
896 /* Ask the agent whether the a corresponding secret key is available
897 for the given keygrip */
899 gpgsm_agent_havekey (ctrl_t ctrl, const char *hexkeygrip)
902 char line[ASSUAN_LINELENGTH];
904 rc = start_agent (ctrl);
908 if (!hexkeygrip || strlen (hexkeygrip) != 40)
909 return gpg_error (GPG_ERR_INV_VALUE);
911 snprintf (line, DIM(line), "HAVEKEY %s", hexkeygrip);
913 rc = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL, NULL, NULL);
919 learn_status_cb (void *opaque, const char *line)
921 struct learn_parm_s *parm = opaque;
924 /* Pass progress data to the caller. */
925 if ((s = has_leading_keyword (line, "PROGRESS")))
930 if (gpgsm_status (parm->ctrl, STATUS_PROGRESS, line))
931 return gpg_error (GPG_ERR_ASS_CANCELED);
938 learn_cb (void *opaque, const void *buffer, size_t length)
940 struct learn_parm_s *parm = opaque;
951 put_membuf (parm->data, buffer, length);
954 /* END encountered - process what we have */
955 buf = get_membuf (parm->data, &len);
958 parm->error = gpg_error (GPG_ERR_ENOMEM);
962 if (gpgsm_status (parm->ctrl, STATUS_PROGRESS, "learncard C 0 0"))
963 return gpg_error (GPG_ERR_ASS_CANCELED);
965 /* FIXME: this should go into import.c */
966 rc = ksba_cert_new (&cert);
972 rc = ksba_cert_init_from_mem (cert, buf, len);
975 log_error ("failed to parse a certificate: %s\n", gpg_strerror (rc));
976 ksba_cert_release (cert);
981 /* We do not store a certifciate with missing issuers as ephemeral
982 because we can assume that the --learn-card command has been used
984 rc = gpgsm_basic_cert_check (parm->ctrl, cert);
985 if (rc && gpg_err_code (rc) != GPG_ERR_MISSING_CERT
986 && gpg_err_code (rc) != GPG_ERR_MISSING_ISSUER_CERT)
987 log_error ("invalid certificate: %s\n", gpg_strerror (rc));
992 if (!keydb_store_cert (parm->ctrl, cert, 0, &existed))
994 if (opt.verbose > 1 && existed)
995 log_info ("certificate already in DB\n");
996 else if (opt.verbose && !existed)
997 log_info ("certificate imported\n");
1001 ksba_cert_release (cert);
1002 init_membuf (parm->data, 4096);
1006 /* Call the agent to learn about a smartcard */
1008 gpgsm_agent_learn (ctrl_t ctrl)
1011 struct learn_parm_s learn_parm;
1015 rc = start_agent (ctrl);
1019 rc = warn_version_mismatch (ctrl, agent_ctx, SCDAEMON_NAME, 2);
1023 init_membuf (&data, 4096);
1024 learn_parm.error = 0;
1025 learn_parm.ctrl = ctrl;
1026 learn_parm.ctx = agent_ctx;
1027 learn_parm.data = &data;
1028 rc = assuan_transact (agent_ctx, "LEARN --send",
1029 learn_cb, &learn_parm,
1031 learn_status_cb, &learn_parm);
1032 xfree (get_membuf (&data, &len));
1035 return learn_parm.error;
1039 /* Ask the agent to change the passphrase of the key identified by
1040 HEXKEYGRIP. If DESC is not NULL, display instead of the default
1041 description message. */
1043 gpgsm_agent_passwd (ctrl_t ctrl, const char *hexkeygrip, const char *desc)
1046 char line[ASSUAN_LINELENGTH];
1047 struct default_inq_parm_s inq_parm;
1049 rc = start_agent (ctrl);
1052 inq_parm.ctrl = ctrl;
1053 inq_parm.ctx = agent_ctx;
1055 if (!hexkeygrip || strlen (hexkeygrip) != 40)
1056 return gpg_error (GPG_ERR_INV_VALUE);
1060 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
1061 rc = assuan_transact (agent_ctx, line,
1062 NULL, NULL, NULL, NULL, NULL, NULL);
1067 snprintf (line, DIM(line), "PASSWD %s", hexkeygrip);
1069 rc = assuan_transact (agent_ctx, line, NULL, NULL,
1070 default_inq_cb, &inq_parm, NULL, NULL);
1076 /* Ask the agent to pop up a confirmation dialog with the text DESC
1077 and an okay and cancel button. */
1079 gpgsm_agent_get_confirmation (ctrl_t ctrl, const char *desc)
1082 char line[ASSUAN_LINELENGTH];
1083 struct default_inq_parm_s inq_parm;
1085 rc = start_agent (ctrl);
1088 inq_parm.ctrl = ctrl;
1089 inq_parm.ctx = agent_ctx;
1091 snprintf (line, DIM(line), "GET_CONFIRMATION %s", desc);
1093 rc = assuan_transact (agent_ctx, line, NULL, NULL,
1094 default_inq_cb, &inq_parm, NULL, NULL);
1100 /* Return 0 if the agent is alive. This is useful to make sure that
1101 an agent has been started. */
1103 gpgsm_agent_send_nop (ctrl_t ctrl)
1107 rc = start_agent (ctrl);
1109 rc = assuan_transact (agent_ctx, "NOP",
1110 NULL, NULL, NULL, NULL, NULL, NULL);
1117 keyinfo_status_cb (void *opaque, const char *line)
1119 char **serialno = opaque;
1122 if ((s = has_leading_keyword (line, "KEYINFO")) && !*serialno)
1124 s = strchr (s, ' ');
1125 if (s && s[1] == 'T' && s[2] == ' ' && s[3])
1128 s2 = strchr (s, ' ');
1131 *serialno = xtrymalloc ((s2 - s)+1);
1134 memcpy (*serialno, s, s2 - s);
1135 (*serialno)[s2 - s] = 0;
1143 /* Return the serial number for a secret key. If the returned serial
1144 number is NULL, the key is not stored on a smartcard. Caller needs
1145 to free R_SERIALNO. */
1147 gpgsm_agent_keyinfo (ctrl_t ctrl, const char *hexkeygrip, char **r_serialno)
1150 char line[ASSUAN_LINELENGTH];
1151 char *serialno = NULL;
1155 err = start_agent (ctrl);
1159 if (!hexkeygrip || strlen (hexkeygrip) != 40)
1160 return gpg_error (GPG_ERR_INV_VALUE);
1162 snprintf (line, DIM(line), "KEYINFO %s", hexkeygrip);
1164 err = assuan_transact (agent_ctx, line, NULL, NULL, NULL, NULL,
1165 keyinfo_status_cb, &serialno);
1166 if (!err && serialno)
1168 /* Sanity check for bad characters. */
1169 if (strpbrk (serialno, ":\n\r"))
1170 err = GPG_ERR_INV_VALUE;
1175 *r_serialno = serialno;
1181 /* Ask for the passphrase (this is used for pkcs#12 import/export. On
1182 success the caller needs to free the string stored at R_PASSPHRASE.
1183 On error NULL will be stored at R_PASSPHRASE and an appropriate
1184 error code returned. If REPEAT is true the agent tries to get a
1185 new passphrase (i.e. asks the user to confirm it). */
1187 gpgsm_agent_ask_passphrase (ctrl_t ctrl, const char *desc_msg, int repeat,
1188 char **r_passphrase)
1191 char line[ASSUAN_LINELENGTH];
1194 struct default_inq_parm_s inq_parm;
1196 *r_passphrase = NULL;
1198 err = start_agent (ctrl);
1201 inq_parm.ctrl = ctrl;
1202 inq_parm.ctx = agent_ctx;
1204 if (desc_msg && *desc_msg && !(arg4 = percent_plus_escape (desc_msg)))
1205 return gpg_error_from_syserror ();
1207 snprintf (line, DIM(line), "GET_PASSPHRASE --data%s -- X X X %s",
1208 repeat? " --repeat=1 --check --qualitybar":"",
1212 init_membuf_secure (&data, 64);
1213 err = assuan_transact (agent_ctx, line,
1214 put_membuf_cb, &data,
1215 default_inq_cb, &inq_parm, NULL, NULL);
1218 xfree (get_membuf (&data, NULL));
1221 put_membuf (&data, "", 1);
1222 *r_passphrase = get_membuf (&data, NULL);
1224 err = gpg_error_from_syserror ();
1231 /* Retrieve a key encryption key from the agent. With FOREXPORT true
1232 the key shall be use for export, with false for import. On success
1233 the new key is stored at R_KEY and its length at R_KEKLEN. */
1235 gpgsm_agent_keywrap_key (ctrl_t ctrl, int forexport,
1236 void **r_kek, size_t *r_keklen)
1242 char line[ASSUAN_LINELENGTH];
1243 struct default_inq_parm_s inq_parm;
1246 err = start_agent (ctrl);
1249 inq_parm.ctrl = ctrl;
1250 inq_parm.ctx = agent_ctx;
1252 snprintf (line, DIM(line), "KEYWRAP_KEY %s",
1253 forexport? "--export":"--import");
1255 init_membuf_secure (&data, 64);
1256 err = assuan_transact (agent_ctx, line,
1257 put_membuf_cb, &data,
1258 default_inq_cb, &inq_parm, NULL, NULL);
1261 xfree (get_membuf (&data, &len));
1264 buf = get_membuf (&data, &len);
1266 return gpg_error_from_syserror ();
1275 /* Handle the inquiry for an IMPORT_KEY command. */
1277 inq_import_key_parms (void *opaque, const char *line)
1279 struct import_key_parm_s *parm = opaque;
1282 if (has_leading_keyword (line, "KEYDATA"))
1284 assuan_begin_confidential (parm->ctx);
1285 err = assuan_send_data (parm->ctx, parm->key, parm->keylen);
1286 assuan_end_confidential (parm->ctx);
1290 struct default_inq_parm_s inq_parm = { parm->ctrl, parm->ctx };
1291 err = default_inq_cb (&inq_parm, line);
1298 /* Call the agent to import a key into the agent. */
1300 gpgsm_agent_import_key (ctrl_t ctrl, const void *key, size_t keylen)
1303 struct import_key_parm_s parm;
1305 err = start_agent (ctrl);
1310 parm.ctx = agent_ctx;
1312 parm.keylen = keylen;
1314 err = assuan_transact (agent_ctx, "IMPORT_KEY",
1315 NULL, NULL, inq_import_key_parms, &parm, NULL, NULL);
1321 /* Receive a secret key from the agent. KEYGRIP is the hexified
1322 keygrip, DESC a prompt to be displayed with the agent's passphrase
1323 question (needs to be plus+percent escaped). On success the key is
1324 stored as a canonical S-expression at R_RESULT and R_RESULTLEN. */
1326 gpgsm_agent_export_key (ctrl_t ctrl, const char *keygrip, const char *desc,
1327 unsigned char **r_result, size_t *r_resultlen)
1333 char line[ASSUAN_LINELENGTH];
1334 struct default_inq_parm_s inq_parm;
1338 err = start_agent (ctrl);
1341 inq_parm.ctrl = ctrl;
1342 inq_parm.ctx = agent_ctx;
1346 snprintf (line, DIM(line), "SETKEYDESC %s", desc);
1347 err = assuan_transact (agent_ctx, line,
1348 NULL, NULL, NULL, NULL, NULL, NULL);
1353 snprintf (line, DIM(line), "EXPORT_KEY %s", keygrip);
1355 init_membuf_secure (&data, 1024);
1356 err = assuan_transact (agent_ctx, line,
1357 put_membuf_cb, &data,
1358 default_inq_cb, &inq_parm, NULL, NULL);
1361 xfree (get_membuf (&data, &len));
1364 buf = get_membuf (&data, &len);
1366 return gpg_error_from_syserror ();