/* call-dirmngr.c - GPG operations to the Dirmngr.
* Copyright (C) 2011 Free Software Foundation, Inc.
+ * Copyright (C) 2015 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>
-#include <assert.h>
#ifdef HAVE_LOCALE_H
# include <locale.h>
#endif
#include "i18n.h"
#include "asshelp.h"
#include "keyserver.h"
+#include "status.h"
#include "call-dirmngr.h"
/* Parameter structure used to gather status info. */
struct ks_status_parm_s
{
+ const char *keyword; /* Look for this keyword or NULL for "SOURCE". */
char *source;
};
};
+/* Parameter structure used with the DNS_CERT command. */
+struct dns_cert_parm_s
+{
+ estream_t memfp;
+ unsigned char *fpr;
+ size_t fprlen;
+ char *url;
+};
+
+
/* Data used to associate an session with dirmngr contexts. We can't
use a simple one to one mapping because we sometimes need two
connections to the dirmngr; for example while doing a listing and
/* The active Assuan context. */
assuan_context_t ctx;
+ /* Flag set when the keyserver names have been send. */
+ int set_keyservers_done;
+
/* Flag set to true while an operation is running on CTX. */
int is_active;
};
}
+/* Print a warning if the server's version number is less than our
+ version number. Returns an error code on a connection problem. */
+static gpg_error_t
+warn_version_mismatch (assuan_context_t ctx, const char *servername)
+{
+ gpg_error_t err;
+ char *serverversion;
+ const char *myversion = strusage (13);
+
+ err = get_assuan_server_version (ctx, 0, &serverversion);
+ if (err)
+ log_error (_("error getting version from '%s': %s\n"),
+ servername, gpg_strerror (err));
+ else if (compare_version_strings (serverversion, myversion) < 0)
+ {
+ char *warn;
+
+ warn = xtryasprintf (_("server '%s' is older than us (%s < %s)"),
+ servername, serverversion, myversion);
+ if (!warn)
+ err = gpg_error_from_syserror ();
+ else
+ {
+ log_info (_("WARNING: %s\n"), warn);
+ write_status_strings (STATUS_WARNING, "server_version_mismatch 0",
+ " ", warn, NULL);
+ xfree (warn);
+ }
+ }
+ xfree (serverversion);
+ return err;
+}
+
+
/* Try to connect to the Dirmngr via a socket or spawn it if possible.
Handle the server's initial greeting and set global options. */
static gpg_error_t
*r_ctx = NULL;
err = start_new_dirmngr (&ctx,
GPG_ERR_SOURCE_DEFAULT,
- opt.homedir,
opt.dirmngr_program,
- opt.autostart, opt.verbose, DBG_ASSUAN,
+ opt.autostart, opt.verbose, DBG_IPC,
NULL /*gpg_status2*/, ctrl);
if (!opt.autostart && gpg_err_code (err) == GPG_ERR_NO_DIRMNGR)
{
log_info (_("no dirmngr running in this session\n"));
}
}
- else if (!err)
+ else if (!err && !(err = warn_version_mismatch (ctx, DIRMNGR_NAME)))
{
- keyserver_spec_t ksi;
+ char *line;
/* Tell the dirmngr that we want to collect audit event. */
/* err = assuan_transact (agent_ctx, "OPTION audit-events=1", */
/* NULL, NULL, NULL, NULL, NULL, NULL); */
-
- /* Set all configured keyservers. We clear existing keyservers
- so that any keyserver configured in GPG overrides keyservers
- possibly still configured in Dirmngr for the session (Note
- that the keyserver list of a session in Dirmngr survives a
- RESET. */
- for (ksi = opt.keyserver; !err && ksi; ksi = ksi->next)
+ if (opt.keyserver_options.http_proxy)
{
- char *line;
-
- line = xtryasprintf ("KEYSERVER%s %s",
- ksi == opt.keyserver? " --clear":"", ksi->uri);
+ line = xtryasprintf ("OPTION http-proxy=%s",
+ opt.keyserver_options.http_proxy);
if (!line)
err = gpg_error_from_syserror ();
else
{
- err = assuan_transact (ctx, line,
- NULL, NULL, NULL, NULL, NULL, NULL);
+ err = assuan_transact (ctx, line, NULL, NULL, NULL,
+ NULL, NULL, NULL);
xfree (line);
}
}
+
+ if (err)
+ ;
+ else if ((opt.keyserver_options.options & KEYSERVER_HONOR_KEYSERVER_URL))
+ {
+ /* Tell the dirmngr that this possibly privacy invading
+ option is in use. If Dirmngr is running in Tor mode, it
+ will return an error. */
+ err = assuan_transact (ctx, "OPTION honor-keyserver-url-used",
+ NULL, NULL, NULL, NULL, NULL, NULL);
+ if (gpg_err_code (err) == GPG_ERR_FORBIDDEN)
+ log_error (_("keyserver option \"honor-keyserver-url\""
+ " may not be used in Tor mode\n"));
+ else if (gpg_err_code (err) == GPG_ERR_UNKNOWN_OPTION)
+ err = 0; /* Old dirmngr versions do not support this option. */
+ }
}
if (err)
if (dml)
{
/* Found an inactive local session - return that. */
- assert (!dml->is_active);
+ log_assert (!dml->is_active);
+
+ /* But first do the per session init if not yet done. */
+ if (!dml->set_keyservers_done)
+ {
+ keyserver_spec_t ksi;
+
+ /* Set all configured keyservers. We clear existing
+ keyservers so that any keyserver configured in GPG
+ overrides keyservers possibly still configured in Dirmngr
+ for the session (Note that the keyserver list of a
+ session in Dirmngr survives a RESET. */
+ for (ksi = opt.keyserver; ksi; ksi = ksi->next)
+ {
+ char *line;
+
+ line = xtryasprintf
+ ("KEYSERVER%s %s",
+ ksi == opt.keyserver? " --clear":"", ksi->uri);
+ if (!line)
+ err = gpg_error_from_syserror ();
+ else
+ {
+ err = assuan_transact (dml->ctx, line, NULL, NULL, NULL,
+ NULL, NULL, NULL);
+ xfree (line);
+ }
+
+ if (err)
+ return err;
+ }
+
+ dml->set_keyservers_done = 1;
+ }
+
dml->is_active = 1;
+
*r_ctx = dml->ctx;
return 0;
}
xfree (dml);
return err;
}
+
/* To be on the nPth thread safe site we need to add it to a
list; this is far easier than to have a lock for this
function. It should not happen anyway but the code is free
}
+/* Clear the set_keyservers_done flag on context CTX. */
+static void
+clear_context_flags (ctrl_t ctrl, assuan_context_t ctx)
+{
+ dirmngr_local_t dml;
+
+ if (!ctx)
+ return;
+
+ for (dml = ctrl->dirmngr_local; dml; dml = dml->next)
+ {
+ if (dml->ctx == ctx)
+ {
+ if (!dml->is_active)
+ log_fatal ("clear_context_flags on inactive dirmngr ctx %p\n", ctx);
+ dml->set_keyservers_done = 0;
+ return;
+ }
+ }
+ log_fatal ("clear_context_flags on unknown dirmngr ctx %p\n", ctx);
+}
+
+
\f
-/* Status callback for ks_get and ks_search. */
+/* Status callback for ks_list, ks_get and ks_search. */
static gpg_error_t
ks_status_cb (void *opaque, const char *line)
{
struct ks_status_parm_s *parm = opaque;
gpg_error_t err = 0;
- const char *s;
+ const char *s, *s2;
+ const char *warn;
- if ((s = has_leading_keyword (line, "SOURCE")))
+ if ((s = has_leading_keyword (line, parm->keyword? parm->keyword : "SOURCE")))
{
if (!parm->source)
{
err = gpg_error_from_syserror ();
}
}
+ else if ((s = has_leading_keyword (line, "WARNING")))
+ {
+ if ((s2 = has_leading_keyword (s, "tor_not_running")))
+ warn = _("Tor is not running");
+ else if ((s2 = has_leading_keyword (s, "tor_config_problem")))
+ warn = _("Tor is not properly configured");
+ else
+ warn = NULL;
+
+ if (warn)
+ {
+ log_info (_("WARNING: %s\n"), warn);
+ if (s2)
+ {
+ while (*s2 && !spacep (s2))
+ s2++;
+ while (*s2 && spacep (s2))
+ s2++;
+ if (*s2)
+ print_further_info ("%s", s2);
+ }
+ }
+ }
return err;
}
\f
+/* Run the "KEYSERVER" command to return the name of the used
+ keyserver at R_KEYSERVER. */
+gpg_error_t
+gpg_dirmngr_ks_list (ctrl_t ctrl, char **r_keyserver)
+{
+ gpg_error_t err;
+ assuan_context_t ctx;
+ struct ks_status_parm_s stparm;
+
+ memset (&stparm, 0, sizeof stparm);
+ stparm.keyword = "KEYSERVER";
+ if (r_keyserver)
+ *r_keyserver = NULL;
+
+ err = open_context (ctrl, &ctx);
+ if (err)
+ return err;
+
+ err = assuan_transact (ctx, "KEYSERVER", NULL, NULL,
+ NULL, NULL, ks_status_cb, &stparm);
+ if (err)
+ goto leave;
+ if (!stparm.source)
+ {
+ err = gpg_error (GPG_ERR_NO_KEYSERVER);
+ goto leave;
+ }
+
+ if (r_keyserver)
+ *r_keyserver = stparm.source;
+ else
+ xfree (stparm.source);
+ stparm.source = NULL;
+
+ leave:
+ xfree (stparm.source);
+ close_context (ctrl, ctx);
+ return err;
+}
+
+
+\f
/* Data callback for the KS_SEARCH command. */
static gpg_error_t
ks_search_data_cb (void *opaque, const void *data, size_t datalen)
don't need to escape the patterns before sending them to the
server.
+ If QUICK is set the dirmngr is advised to use a shorter timeout.
+
If R_SOURCE is not NULL the source of the data is stored as a
malloced string there. If a source is not known NULL is stored.
are able to ask for (1000-10-1)/(2+8+1) = 90 keys at once. */
gpg_error_t
gpg_dirmngr_ks_get (ctrl_t ctrl, char **pattern,
+ keyserver_spec_t override_keyserver, int quick,
estream_t *r_fp, char **r_source)
{
gpg_error_t err;
if (err)
return err;
+ /* If we have an override keyserver we first indicate that the next
+ user of the context needs to again setup the global keyservers and
+ them we send the override keyserver. */
+ if (override_keyserver)
+ {
+ clear_context_flags (ctrl, ctx);
+ line = xtryasprintf ("KEYSERVER --clear %s", override_keyserver->uri);
+ if (!line)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ err = assuan_transact (ctx, line, NULL, NULL, NULL,
+ NULL, NULL, NULL);
+ if (err)
+ goto leave;
+
+ xfree (line);
+ line = NULL;
+ }
+
/* Lump all patterns into one string. */
init_membuf (&mb, 1024);
- put_membuf_str (&mb, "KS_GET --");
+ put_membuf_str (&mb, quick? "KS_GET --quick --" : "KS_GET --");
for (idx=0; pattern[idx]; idx++)
{
put_membuf (&mb, " ", 1); /* Append Delimiter. */
\f
+static void
+record_output (estream_t output,
+ pkttype_t type,
+ const char *validity,
+ /* The public key length or -1. */
+ int pub_key_length,
+ /* The public key algo or -1. */
+ int pub_key_algo,
+ /* 2 ulongs or NULL. */
+ const u32 *keyid,
+ /* The creation / expiration date or 0. */
+ u32 creation_date,
+ u32 expiration_date,
+ const char *userid)
+{
+ const char *type_str = NULL;
+ char *pub_key_length_str = NULL;
+ char *pub_key_algo_str = NULL;
+ char *keyid_str = NULL;
+ char *creation_date_str = NULL;
+ char *expiration_date_str = NULL;
+ char *userid_escaped = NULL;
+
+ switch (type)
+ {
+ case PKT_PUBLIC_KEY:
+ type_str = "pub";
+ break;
+ case PKT_PUBLIC_SUBKEY:
+ type_str = "sub";
+ break;
+ case PKT_USER_ID:
+ type_str = "uid";
+ break;
+ case PKT_SIGNATURE:
+ type_str = "sig";
+ break;
+ default:
+ log_assert (! "Unhandled type.");
+ }
+
+ if (pub_key_length > 0)
+ pub_key_length_str = xasprintf ("%d", pub_key_length);
+
+ if (pub_key_algo != -1)
+ pub_key_algo_str = xasprintf ("%d", pub_key_algo);
+
+ if (keyid)
+ keyid_str = xasprintf ("%08lX%08lX", (ulong) keyid[0], (ulong) keyid[1]);
+
+ if (creation_date)
+ creation_date_str = xstrdup (colon_strtime (creation_date));
+
+ if (expiration_date)
+ expiration_date_str = xstrdup (colon_strtime (expiration_date));
+
+ /* Quote ':', '%', and any 8-bit characters. */
+ if (userid)
+ {
+ int r;
+ int w = 0;
+
+ int len = strlen (userid);
+ /* A 100k character limit on the uid should be way more than
+ enough. */
+ if (len > 100 * 1024)
+ len = 100 * 1024;
+
+ /* The minimum amount of space that we need. */
+ userid_escaped = xmalloc (len * 3 + 1);
+
+ for (r = 0; r < len; r++)
+ {
+ if (userid[r] == ':' || userid[r]== '%' || (userid[r] & 0x80))
+ {
+ sprintf (&userid_escaped[w], "%%%02X", (byte) userid[r]);
+ w += 3;
+ }
+ else
+ userid_escaped[w ++] = userid[r];
+ }
+ userid_escaped[w] = '\0';
+ }
+
+ es_fprintf (output, "%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n",
+ type_str,
+ validity ?: "",
+ pub_key_length_str ?: "",
+ pub_key_algo_str ?: "",
+ keyid_str ?: "",
+ creation_date_str ?: "",
+ expiration_date_str ?: "",
+ "" /* Certificate S/N */,
+ "" /* Ownertrust. */,
+ userid_escaped ?: "",
+ "" /* Signature class. */,
+ "" /* Key capabilities. */,
+ "" /* Issuer certificate fingerprint. */,
+ "" /* Flag field. */,
+ "" /* S/N of a token. */,
+ "" /* Hash algo. */,
+ "" /* Curve name. */);
+
+ xfree (userid_escaped);
+ xfree (expiration_date_str);
+ xfree (creation_date_str);
+ xfree (keyid_str);
+ xfree (pub_key_algo_str);
+ xfree (pub_key_length_str);
+}
+
/* Handle the KS_PUT inquiries. */
static gpg_error_t
ks_put_inq_cb (void *opaque, const char *line)
if (!fp)
err = gpg_error_from_syserror ();
+ /* Note: the output format for the INFO block follows the colon
+ format as described in doc/DETAILS. We don't actually reuse
+ the functionality from g10/keylist.c to produce the output,
+ because we don't need all of it and some of it is quite
+ expensive to generate.
+
+ The fields are (the starred fields are the ones we need):
+
+ * Field 1 - Type of record
+ * Field 2 - Validity
+ * Field 3 - Key length
+ * Field 4 - Public key algorithm
+ * Field 5 - KeyID
+ * Field 6 - Creation date
+ * Field 7 - Expiration date
+ Field 8 - Certificate S/N, UID hash, trust signature info
+ Field 9 - Ownertrust
+ * Field 10 - User-ID
+ Field 11 - Signature class
+ Field 12 - Key capabilities
+ Field 13 - Issuer certificate fingerprint or other info
+ Field 14 - Flag field
+ Field 15 - S/N of a token
+ Field 16 - Hash algorithm
+ Field 17 - Curve name
+ */
for (node = parm->keyblock; !err && node; node=node->next)
{
- switch(node->pkt->pkttype)
+ switch (node->pkt->pkttype)
{
case PKT_PUBLIC_KEY:
case PKT_PUBLIC_SUBKEY:
{
PKT_public_key *pk = node->pkt->pkt.public_key;
+ char validity[3];
+ int i;
+
+ i = 0;
+ if (pk->flags.revoked)
+ validity[i ++] = 'r';
+ if (pk->has_expired)
+ validity[i ++] = 'e';
+ validity[i] = '\0';
+
keyid_from_pk (pk, NULL);
- es_fprintf (fp, "%s:%08lX%08lX:%u:%u:%u:%u:%s%s:\n",
- node->pkt->pkttype==PKT_PUBLIC_KEY? "pub" : "sub",
- (ulong)pk->keyid[0], (ulong)pk->keyid[1],
- pk->pubkey_algo,
- nbits_from_pk (pk),
- pk->timestamp,
- pk->expiredate,
- pk->flags.revoked? "r":"",
- pk->has_expired? "e":"");
+ record_output (fp, node->pkt->pkttype, validity,
+ nbits_from_pk (pk), pk->pubkey_algo,
+ pk->keyid, pk->timestamp, pk->expiredate,
+ NULL);
}
break;
case PKT_USER_ID:
{
PKT_user_id *uid = node->pkt->pkt.user_id;
- int r;
if (!uid->attrib_data)
{
- es_fprintf (fp, "uid:");
-
- /* Quote ':', '%', and any 8-bit characters. */
- for (r=0; r < uid->len; r++)
- {
- if (uid->name[r] == ':'
- || uid->name[r]== '%'
- || (uid->name[r]&0x80))
- es_fprintf (fp, "%%%02X", (byte)uid->name[r]);
- else
- es_putc (uid->name[r], fp);
- }
-
- es_fprintf (fp, ":%u:%u:%s%s:\n",
- uid->created,uid->expiredate,
- uid->is_revoked? "r":"",
- uid->is_expired? "e":"");
+ char validity[3];
+ int i;
+
+ i = 0;
+ if (uid->is_revoked)
+ validity[i ++] = 'r';
+ if (uid->is_expired)
+ validity[i ++] = 'e';
+ validity[i] = '\0';
+
+ record_output (fp, node->pkt->pkttype, validity,
+ -1, -1, NULL,
+ uid->created, uid->expiredate,
+ uid->name);
}
}
break;
PKT_signature *sig = node->pkt->pkt.signature;
if (IS_UID_SIG (sig))
- {
- es_fprintf (fp, "sig:%08lX%08lX:%X:%u:%u:\n",
- (ulong)sig->keyid[0],(ulong)sig->keyid[1],
- sig->sig_class, sig->timestamp,
- sig->expiredate);
- }
+ record_output (fp, node->pkt->pkttype, NULL,
+ -1, -1, sig->keyid,
+ sig->timestamp, sig->expiredate, NULL);
}
break;
close_context (ctrl, ctx);
return err;
}
+
+
+\f
+/* Data callback for the DNS_CERT and WKD_GET commands. */
+static gpg_error_t
+dns_cert_data_cb (void *opaque, const void *data, size_t datalen)
+{
+ struct dns_cert_parm_s *parm = opaque;
+ gpg_error_t err = 0;
+ size_t nwritten;
+
+ if (!data)
+ return 0; /* Ignore END commands. */
+ if (!parm->memfp)
+ return 0; /* Data is not required. */
+
+ if (es_write (parm->memfp, data, datalen, &nwritten))
+ err = gpg_error_from_syserror ();
+
+ return err;
+}
+
+
+/* Status callback for the DNS_CERT command. */
+static gpg_error_t
+dns_cert_status_cb (void *opaque, const char *line)
+{
+ struct dns_cert_parm_s *parm = opaque;
+ gpg_error_t err = 0;
+ const char *s;
+ size_t nbytes;
+
+ if ((s = has_leading_keyword (line, "FPR")))
+ {
+ char *buf;
+
+ if (!(buf = xtrystrdup (s)))
+ err = gpg_error_from_syserror ();
+ else if (parm->fpr)
+ err = gpg_error (GPG_ERR_DUP_KEY);
+ else if (!hex2str (buf, buf, strlen (buf)+1, &nbytes))
+ err = gpg_error_from_syserror ();
+ else if (nbytes < 20)
+ err = gpg_error (GPG_ERR_TOO_SHORT);
+ else
+ {
+ parm->fpr = xtrymalloc (nbytes);
+ if (!parm->fpr)
+ err = gpg_error_from_syserror ();
+ else
+ memcpy (parm->fpr, buf, (parm->fprlen = nbytes));
+ }
+ xfree (buf);
+ }
+ else if ((s = has_leading_keyword (line, "URL")) && *s)
+ {
+ if (parm->url)
+ err = gpg_error (GPG_ERR_DUP_KEY);
+ else if (!(parm->url = xtrystrdup (s)))
+ err = gpg_error_from_syserror ();
+ }
+
+ return err;
+}
+
+/* Ask the dirmngr for a DNS CERT record. Depending on the found
+ subtypes different return values are set:
+
+ - For a PGP subtype a new estream with that key will be returned at
+ R_KEY and the other return parameters are set to NULL/0.
+
+ - For an IPGP subtype the fingerprint is stored as a malloced block
+ at (R_FPR,R_FPRLEN). If an URL is available it is stored as a
+ malloced string at R_URL; NULL is stored if there is no URL.
+
+ If CERTTYPE is DNS_CERTTYPE_ANY this function returns the first
+ CERT record found with a supported type; it is expected that only
+ one CERT record is used. If CERTTYPE is one of the supported
+ certtypes, only records with this certtype are considered and the
+ first one found is returned. All R_* args are optional.
+
+ If CERTTYPE is NULL the DANE method is used to fetch the key.
+ */
+gpg_error_t
+gpg_dirmngr_dns_cert (ctrl_t ctrl, const char *name, const char *certtype,
+ estream_t *r_key,
+ unsigned char **r_fpr, size_t *r_fprlen,
+ char **r_url)
+{
+ gpg_error_t err;
+ assuan_context_t ctx;
+ struct dns_cert_parm_s parm;
+ char *line = NULL;
+
+ memset (&parm, 0, sizeof parm);
+ if (r_key)
+ *r_key = NULL;
+ if (r_fpr)
+ *r_fpr = NULL;
+ if (r_fprlen)
+ *r_fprlen = 0;
+ if (r_url)
+ *r_url = NULL;
+
+ err = open_context (ctrl, &ctx);
+ if (err)
+ return err;
+
+ line = es_bsprintf ("DNS_CERT %s %s", certtype? certtype : "--dane", name);
+ if (!line)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ if (strlen (line) + 2 >= ASSUAN_LINELENGTH)
+ {
+ err = gpg_error (GPG_ERR_TOO_LARGE);
+ goto leave;
+ }
+
+ parm.memfp = es_fopenmem (0, "rwb");
+ if (!parm.memfp)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ err = assuan_transact (ctx, line, dns_cert_data_cb, &parm,
+ NULL, NULL, dns_cert_status_cb, &parm);
+ if (err)
+ goto leave;
+
+ if (r_key)
+ {
+ es_rewind (parm.memfp);
+ *r_key = parm.memfp;
+ parm.memfp = NULL;
+ }
+
+ if (r_fpr && parm.fpr)
+ {
+ *r_fpr = parm.fpr;
+ parm.fpr = NULL;
+ }
+ if (r_fprlen)
+ *r_fprlen = parm.fprlen;
+
+ if (r_url && parm.url)
+ {
+ *r_url = parm.url;
+ parm.url = NULL;
+ }
+
+ leave:
+ xfree (parm.fpr);
+ xfree (parm.url);
+ es_fclose (parm.memfp);
+ xfree (line);
+ close_context (ctrl, ctx);
+ return err;
+}
+
+
+/* Ask the dirmngr for PKA info. On success the retrieved fingerprint
+ is returned in a malloced buffer at R_FPR and its length is stored
+ at R_FPRLEN. If an URL is available it is stored as a malloced
+ string at R_URL. On error all return values are set to NULL/0. */
+gpg_error_t
+gpg_dirmngr_get_pka (ctrl_t ctrl, const char *userid,
+ unsigned char **r_fpr, size_t *r_fprlen,
+ char **r_url)
+{
+ gpg_error_t err;
+ assuan_context_t ctx;
+ struct dns_cert_parm_s parm;
+ char *line = NULL;
+
+ memset (&parm, 0, sizeof parm);
+ if (r_fpr)
+ *r_fpr = NULL;
+ if (r_fprlen)
+ *r_fprlen = 0;
+ if (r_url)
+ *r_url = NULL;
+
+ err = open_context (ctrl, &ctx);
+ if (err)
+ return err;
+
+ line = es_bsprintf ("DNS_CERT --pka -- %s", userid);
+ if (!line)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ if (strlen (line) + 2 >= ASSUAN_LINELENGTH)
+ {
+ err = gpg_error (GPG_ERR_TOO_LARGE);
+ goto leave;
+ }
+
+ err = assuan_transact (ctx, line, dns_cert_data_cb, &parm,
+ NULL, NULL, dns_cert_status_cb, &parm);
+ if (err)
+ goto leave;
+
+ if (r_fpr && parm.fpr)
+ {
+ *r_fpr = parm.fpr;
+ parm.fpr = NULL;
+ }
+ if (r_fprlen)
+ *r_fprlen = parm.fprlen;
+
+ if (r_url && parm.url)
+ {
+ *r_url = parm.url;
+ parm.url = NULL;
+ }
+
+ leave:
+ xfree (parm.fpr);
+ xfree (parm.url);
+ xfree (line);
+ close_context (ctrl, ctx);
+ return err;
+}
+
+
+\f
+/* Ask the dirmngr to retrieve a key via the Web Key Directory
+ * protocol. If QUICK is set the dirmngr is advised to use a shorter
+ * timeout. On success a new estream with the key is stored at R_KEY.
+ */
+gpg_error_t
+gpg_dirmngr_wkd_get (ctrl_t ctrl, const char *name, int quick, estream_t *r_key)
+{
+ gpg_error_t err;
+ assuan_context_t ctx;
+ struct dns_cert_parm_s parm;
+ char *line = NULL;
+
+ memset (&parm, 0, sizeof parm);
+
+ err = open_context (ctrl, &ctx);
+ if (err)
+ return err;
+
+ line = es_bsprintf ("WKD_GET%s -- %s", quick?" --quick":"", name);
+ if (!line)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ if (strlen (line) + 2 >= ASSUAN_LINELENGTH)
+ {
+ err = gpg_error (GPG_ERR_TOO_LARGE);
+ goto leave;
+ }
+
+ parm.memfp = es_fopenmem (0, "rwb");
+ if (!parm.memfp)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ err = assuan_transact (ctx, line, dns_cert_data_cb, &parm,
+ NULL, NULL, NULL, &parm);
+ if (err)
+ goto leave;
+
+ if (r_key)
+ {
+ es_rewind (parm.memfp);
+ *r_key = parm.memfp;
+ parm.memfp = NULL;
+ }
+
+ leave:
+ xfree (parm.fpr);
+ xfree (parm.url);
+ es_fclose (parm.memfp);
+ xfree (line);
+ close_context (ctrl, ctx);
+ return err;
+}
projects / platform / upstream / gpg2.git / blobdiff