- It is now more portable and may be used outside of GnuPG
- vfat file systems are now supported.
- The use of link(2) is more robust.
- Wrote extensive documentation.
Since 2009-12-08 gpg was not able to find email addresses indicated
by a leading '<'. This happened when I merged the user id
classification code of gpgsm and gpg.
To better cope with round robin pooled A records like keys.gnupg.net
we need to keep some information on unresponsive hosts etc. What we
do now is to resolve the hostnames, remember them and select a random
one. If a host is dead it will be marked and a different one
selected. This is intended to solve the problem of long timeouts due
to unresponsive hosts.
The code is not yet finished but selection works.
The basic network code from http.c is used for finger. This keeps the
network related code at one place and we are able to use the somewhat
matured code form http.c. Unfortunately I had to enhance the http
code for more robustness and probably introduced new bugs.
Test this code using
gpg --fetch-key finger:wk@g10code.com
(I might be the last user of finger ;-)
We better do this once and for all instead of cluttering all future
commits with diffs of trailing white spaces. In the majority of cases
blank or single lines are affected and thus this change won't disturb
a git blame too much. For future commits the pre-commit scripts
checks that this won't happen again.
DECRYPTION_INFO <mdc_method> <sym_algo>
Print information about the symmetric encryption algorithm and
the MDC method. This will be emitted even if the decryption
fails.
Wrote the ChangeLog 2011-01-13 entry for Andrey's orginal work modulo
the cleanups I did in the last week. Adjusted my own ChangeLog
entries to be consistent with that entry.
Nuked quite some trailing spaces; again sorry for that, I will better
take care of not saving them in the future. "git diff -b" is useful
to read the actual changes ;-).
The ECC-INTEGRATION-2-1 branch can be closed now.
Import and export of secret keys does now work. Encryption has been
fixed to be compatible with the sample messages.
This version tests for new Libgcrypt function and thus needs to be
build with a new Libgcrypt installed.
Changed order of some conditional to make to put the special case into
the true branch. Indentation changes. Minor other changes to make the
ECC code more similar to the rest of our code.
It builds but many sefltests still fail. Need to fix that before
using it with an ECDH enabled libgcrypt.
[/]
2011-01-21 Werner Koch <wk@g10code.com>
* configure.ac: Need Libgcrypt 1.4.6 due to AESWRAP.
(HAVE_GCRY_PK_ECDH): Add new test.
[agent/]
2011-01-21 Werner Koch <wk@g10code.com>
* cvt-openpgp.c (GCRY_PK_ECDH) [!HAVE_GCRY_PK_ECDH]: New.
[include/]
2011-01-21 Werner Koch <wk@g10code.com>
* cipher.h (GCRY_PK_USAGE_CERT): Remove compatibility macros
because we now require libgcrypt 1.4.6.
(GCRY_PK_ECDH): Add replacement.
The following works:
gpg2 --gen-key (ECC)
gpg2 --list-keys
gpg2 --list-packets ~/.gnupg/pubring.gpg
gpg2 --list-packets <private key from http://sites.google.com/site/brainhub/pgpecckeys>
ECDH doesn't work yet as the code must be re-written to adjust for gpg-agent refactoring.
2010-04-20 Marcus Brinkmann <marcus@g10code.de>
* logging.c (do_log_ignore_arg): New helper function.
(log_string): Use it to remove ugly volatile hack that causes gcc
warning.
(log_flush): Likewise.
* sysutils.c (gnupg_unsetenv) [!HAVE_W32CE_SYSTEM]: Return something.
(gnupg_setenv) [!HAVE_W32CE_SYSTEM]: Likewise.
* pka.c (get_pka_info): Solve strict aliasing rule violation.
* t-exechelp.c (test_close_all_fds): Use dummy variables to
silence gcc warning.
kbx/
2010-04-20 Marcus Brinkmann <marcus@g10code.de>
* keybox-update.c [!HAVE_DOSISH_SYSTEM]: Include
../common/sysutils.h even then to silence gcc warning about
missing declaration of gnupg_remove.
tools/
2010-04-20 Marcus Brinkmann <marcus@g10code.de>
* gpgconf-comp.c (option_check_validity): Use dummy variables to
silence gcc warning.
* asshelp.c (start_new_gpg_agent) [HAVE_W32_SYSTEM]: Add missing
argument in assuan_socket_connect invocation.
* iobuf.c (iobuf_open_fd_or_name): Fix type of FD in function
declaration.
2009-11-05 Marcus Brinkmann <marcus@g10code.de>
* call-pinentry.c (start_pinentry): Call assuan_pipe_connect, not
assuan_pipe_connect_ext.
* command.c (start_command_handler): Change
assuan_init_socket_server_ext into assuan_init_socket_server.
* call-scd.c (start_scd): Update use of assuan_socket_connect and
assuan_pipe_connect.
* gpg-agent.c (check_own_socket_thread, check_for_running_agent):
Update use of assuan_socket_connect.
common/
2009-11-05 Marcus Brinkmann <marcus@g10code.de>
* asshelp.c (start_new_gpg_agent): Update use of
assuan_socket_connect and assuan_pipe_connect.
scd/
2009-11-05 Marcus Brinkmann <marcus@g10code.de>
* command.c (scd_command_handler): Call assuan_init_socket_server,
not assuan_init_socket_server_ext.
sm/
2009-11-05 Marcus Brinkmann <marcus@g10code.de>
* call-dirmngr.c (start_dirmngr_ext): Update use of
assuan_pipe_connect and assuan_socket_connect.
tools/
2009-11-05 Marcus Brinkmann <marcus@g10code.de>
* gpg-connect-agent.c (start_agent): Update use of
assuan_socket_connect and assuan_pipe_connect.
2009-11-02 Marcus Brinkmann <marcus@g10code.de>
* command.c (reset_notify): Take LINE arg and return error.
(register_commands): Use assuan_handler_t type.
common/
2009-11-02 Marcus Brinkmann <marcus@g10code.de>
* get-passphrase.c (default_inq_cb, membuf_data_cb): Change return
type to gpg_error_t.
g10/
2009-11-02 Marcus Brinkmann <marcus@g10code.de>
* server.c (reset_notify, input_notify, output_notify): Update to
new assuan interface.
(register_commands): Use assuan_handler_t.
scd/
2009-11-02 Marcus Brinkmann <marcus@g10code.de>
* command.c (reset_notify): Take LINE arg and return error.
(register_commands): Use assuan_handler_t type.
sm/
2009-11-02 Marcus Brinkmann <marcus@g10code.de>
* server.c (reset_notify, input_notify, output_notify): Update to
new assuan interface.
(register_commands): Use assuan_handler_t.
* call-agent.c (membuf_data_cb, default_inq_cb)
(inq_ciphertext_cb, scd_serialno_status_cb)
(scd_keypairinfo_status_cb, istrusted_status_cb)
(learn_status_cb, learn_cb, keyinfo_status_cb): Return gpg_error_t.
* configure.ac (NEED_LIBASSUAN_API, NEED_LIBASSUAN_VERSION):
Update to new API (2, 1.1.0).
agent/
2009-09-23 Marcus Brinkmann <marcus@g10code.de>
* gpg-agent.c (parse_rereadable_options): Don't set global assuan
log file (there ain't one anymore).
(main): Update to new API.
(check_own_socket_pid_cb): Return gpg_error_t instead of int.
(check_own_socket_thread, check_for_running_agent): Create assuan
context before connecting to server.
* command.c: Include "scdaemon.h" before <assuan.h> because of
GPG_ERR_SOURCE_DEFAULT check.
(write_and_clear_outbuf): Use gpg_error_t instead of
assuan_error_t.
(cmd_geteventcounter, cmd_istrusted, cmd_listtrusted)
(cmd_marktrusted, cmd_havekey, cmd_sigkey, cmd_setkeydesc)
(cmd_sethash, cmd_pksign, cmd_pkdecrypt, cmd_genkey, cmd_readkey)
(cmd_keyinfo, cmd_get_passphrase, cmd_clear_passphrase)
(cmd_get_confirmation, cmd_learn, cmd_passwd)
(cmd_preset_passphrase, cmd_scd, cmd_getval, cmd_putval)
(cmd_updatestartuptty, cmd_killagent, cmd_reloadagent)
(cmd_getinfo, option_handler): Return gpg_error_t instead of int.
(post_cmd_notify): Change type of ERR to gpg_error_t from int.
(io_monitor): Add hook argument. Use symbols for constants.
(register_commands): Change return type of HANDLER to gpg_error_t.
(start_command_handler): Allocate assuan context before starting
server.
* call-pinentry.c: Include "scdaemon.h" before <assuan.h> because
of GPG_ERR_SOURCE_DEFAULT check.
(unlock_pinentry): Call assuan_release instead of
assuan_disconnect.
(getinfo_pid_cb, getpin_cb): Return gpg_error_t instead of int.
(start_pinentry): Allocate assuan context before connecting to
server.
* call-scd.c (membuf_data_cb, learn_status_cb, get_serialno_cb)
(membuf_data_cb, inq_needpin, card_getattr_cb, pass_status_thru)
(pass_data_thru): Change return type to gpg_error_t.
(start_scd): Allocate assuan context before connecting to server.
common/
2009-09-23 Marcus Brinkmann <marcus@g10code.de>
* asshelp.c (start_new_gpg_agent): Allocate assuan context before
starting server.
g10/
2009-09-23 Marcus Brinkmann <marcus@g10code.de>
* call-agent.c: Include "scdaemon.h" before <assuan.h> because of
GPG_ERR_SOURCE_DEFAULT check.
(learn_status_cb, dummy_data_cb, get_serialno_cb, default_inq_cb)
(learn_status_cb, inq_writecert_parms, inq_writekey_parms)
(scd_genkey_cb, membuf_data_cb): Return gpg_error_t instead of
int.
* gpg.c: Include "scdaemon.h" before <assuan.h> because of
GPG_ERR_SOURCE_DEFAULT check.
(main): Update to new Assuan API.
* server.c: Include "scdaemon.h" before <assuan.h> because of
GPG_ERR_SOURCE_DEFAULT check.
(option_handler, cmd_recipient, cmd_signer, cmd_encrypt)
(cmd_decrypt, cmd_verify, cmd_sign, cmd_import, cmd_export)
(cmd_delkeys, cmd_message, do_listkeys, cmd_listkeys)
(cmd_listsecretkeys, cmd_genkey, cmd_getinfo): Return gpg_error_t
instead of int.
(register_commands): Allocate assuan context before starting
server.
(gpg_server): Allocate assuan_context before starting server.
scd/
2009-09-23 Marcus Brinkmann <marcus@g10code.de>
* command.c: Include "scdaemon.h" before <assuan.h> because of
GPG_ERR_SOURCE_DEFAULT check.
(option_handler, open_card, cmd_serialno, cmd_lean, cmd_readcert)
(cmd_readkey, cmd_setdata, cmd_pksign, cmd_pkauth, cmd_pkdecrypt)
(cmd_getattr, cmd_setattr, cmd_writecert, cmd_writekey)
(cmd_genkey, cmd_random, cmd_passwd, cmd_checkpin, cmd_lock)
(cmd_unlock, cmd_getinfo, cmd_restart, cmd_disconnect, cmd_apdu)
(cmd_killscd): Return gpg_error_t instead of int.
(scd_command_handler): Allocate assuan context before starting server.
* scdaemon.c (main): Update to new Assuan API.
sm/
2009-09-23 Marcus Brinkmann <marcus@g10code.de>
* gpgsm.c (main): Update to new assuan API.
* server.c: Include "gpgsm.h" before <assuan.h> due to check for
GPG_ERR_SOURCE_DEFAULT and assuan.h now including gpg-error.h.
(option_handler, cmd_recipient, cmd_signer, cmd_encrypt)
(cmd_decrypt, cmd_verify, cmd_sign, cmd_import, cmd_export)
(cmd_delkeys, cmd_message, cmd_listkeys, cmd_dumpkeys)
(cmd_listsecretkeys, cmd_dumpsecretkeys, cmd_genkey)
(cmd_getauditlog, cmd_getinfo): Return gpg_error_t instead of int.
(register_commands): Same for member HANDLER in table.
(gpgsm_server): Allocate assuan context before starting server.
* sm/call-dirmngr.c:
* call-dirmngr.c (prepare_dirmngr): Check for CTX and error before
setting LDAPSERVER.
(start_dirmngr_ext): Allocate assuan context before starting
server.
(inq_certificate, isvalid_status_cb, lookup_cb, lookup_status_cb)
(run_command_cb, run_command_inq_cb, run_command_status_cb):
Return gpg_error_t instead of int.
tools/
2009-09-23 Marcus Brinkmann <marcus@g10code.de>
* gpg-connect-agent.c (getinfo_pid_cb, read_and_print_response)
(main): Update to new Assuan API.
sufficient to turn the feature on. (http_open): From here.
(http_document): And here.
* gpgkeys_hkp.c (srv_replace): New function to transform a SRV
hostname to a real hostname. (main): Call it from here for the
HAVE_LIBCURL case (without libcurl is handled via the curl-shim).
* curl-shim.h, curl-shim.c (curl_easy_setopt, curl_easy_perform): Add
a CURLOPT_SRVTAG_GPG_HACK (passed through the the http engine).
* sysutils.h (translate_table_init, translate_table_lookup): New
prototypes.
* sysutils.c: Include <ctype.h>.
(FD_TRANSLATE_MAX): New macro.
(fd_translate, fd_translate_len): New static variables.
(translate_table_init, translate_table_lookup): New functions.
(translate_sys2libc_fd_int): Translate file descriptor.
* iobuf.c (check_special_filename): Translate handle values from
special filenames.
* http.c (do_parse_uri): Remove the hkp port 11371 detection. We
implement hkp in the keyserver handler, and the support here makes it
appear like a bad hkp request actually succeeded.
g10/
* passphrase.c (passphrase_get): Set the cancel flag on all error
from the agent. Fixes a bug reported by Tom Duerbusch.
sm/
* gpgsm.c (main): Let --gen-key print a more informative error
message.
* protect-tool.c (get_passphrase): New arg OPT_CHECK.
(get_new_passphrase): Enable OTP_CHECK on the first call.
* command.c (cmd_get_passphrase): Implement option --check.
* gpg-agent.c (MIN_PASSPHRASE_LEN): New
(parse_rereadable_options): New option --min-passphrase-len.
* genkey.c (check_passphrase_constraints): New.
(agent_genkey, agent_protect_and_store): Call new function. Fix
memory leak.
* call-pinentry.c (agent_askpin): Allow translation of the displayed
error message.
(agent_popup_message_start): Remove arg CANCEL_BTN.
(popup_message_thread): Use --one-button option.
* command.c (cmd_passwd): Now that we don't distinguish between
assuan and regular error codes we can jump to the end on error.
common/
* simple-pwquery.c (simple_pwquery): New arg OPT_CHECK.
char * vs. unsigned char * warnings. The GNU coding standards used to
say that these mismatches are okay and better than a bunch of casts.
Obviously this has changed now.
* gpg-agent.c: New option --write-env-file.
* gpg-agent.c (handle_connections): Make sure that the signals we
are handling are not blocked.Block signals while creating new
threads.
* estream.c: Use HAVE_CONFIG_H and not USE_CONFIG_H!
(es_func_fd_read, es_func_fd_write): Protect against EINTR.
* gpg-agent.texi (Agent UPDATESTARTUPTTY): New.
* scdaemon.c (handle_connections): Make sure that the signals we
are handling are not blocked.Block signals while creating new
threads.
(handle_connections): Include the file descriptor into the name of
the thread.
* dynload.h: s/__inline__/inline/.
* tlv.c [GNUPG_MAJOR_VERSION==1]: Define constants instead of
including a gnupg 1.4 header.
* watchgnupg.c: Make sure that PF_LCOAL and AF_LOCAL are defines.
Noted by Ray Link.
sm/
* call-dirmngr.c (inq_certificate): Add new inquire SENDCERT_SKI.
* certlist.c (gpgsm_find_cert): Add new arg KEYID and implement
this filter. Changed all callers.
* certchain.c (find_up_search_by_keyid): New helper.
(find_up): Also try using the AKI.keyIdentifier.
(find_up_external): Ditto.
%0A may pass through.
* agent.h (server_control_s): New field USE_AUTH_CALL.
* call-scd.c (agent_card_pksign): Make use of it.
* command-ssh.c (data_sign): Set the flag.
(ssh_send_key_public): New arg OVERRIDE_COMMENT.
(card_key_available): Add new arg CARDSN.
(ssh_handler_request_identities): Use the card s/n as comment.
(sexp_key_extract): Use GCRYMPI_FMT_STD.
(data_sign): Ditto.
* learncard.c (make_shadow_info): Moved to ..
* protect.c (make_shadow_info): .. here. Return NULL on malloc
failure. Made global.
* agent.h: Add prototype.
* xasprintf.c (xtryasprintf): New.
* app-openpgp.c (get_public_key): Make sure not to return negative
numbers.
(do_sign): Allow passing of indata with algorithm prefix.
(do_auth): Allow OPENPGP.3 as an alternative ID.
* app.c (app_getattr): Return just the S/N but not the timestamp.
* no-libgcrypt.c (gcry_strdup): New.
select returns with -1.
* tools.texi (gpg-connect-agent): New.
* app-openpgp.c (get_one_do): Never try to get a non cacheable
object from the cache.
(get_one_do): Add new arg to return an error code. Changed all
callers.
(do_getattr): Let it return a proper error code.
* app.c (select_application): Return an error code and the
application context in an new arg.
* command.c (open_card): Adjusted for that. Don't use the
fallback if no card is present. Return an error if the card has
been removed without a reset.
(do_reset, cmd_serialno): Clear that error flag.
(TEST_CARD_REMOVAL): New. Use it with all command handlers.
* scdaemon.c (ticker_thread): Termintate if a shutdown is pending.
* apdu.c: Added some PCSC error codes.
(pcsc_error_to_sw): New.
(reset_pcsc_reader, pcsc_get_status, pcsc_send_apdu)
(open_pcsc_reader): Do proper error code mapping.
* gpg-connect-agent.c: New.
* Makefile.am: Add it.
1.9.
* agent.h (agent_exit): Add JNLIB_GCC_A_NR to indicate that this
function won't return.
* gpg-agent.c (check_for_running_agent): Initialize pid to a
default value if not needed.
* command-ssh.c: Removed stdint.h. s/byte_t/unsigned char/,
s/uint32/u32/ becuase that is what we have always used in GnuPG.
(ssh_request_specs): Moved to top of file.
(ssh_key_types): Ditto.
(make_cstring): Ditto.
(data_sign): Don't use a variable for the passphrase prompt, make
it translatable.
(ssh_request_process):
* findkey.c (modify_description): Renamed arguments for clarity,
polished documentation. Make comment a C-string. Fixed case of
DESCRIPTION being just "%".
(agent_key_from_file): Make sure comment string to a C-string.
* gpg-agent.c (create_socket_name): Cleanup the implemntation, use
DIMof, agent_exit, removed superflous args and return the
allocated string as value. Documented. Changed callers.
(create_server_socket): Cleanups similar to above. Changed callers.
(cleanup_do): Renamed to ..
(remove_socket): .. this. Changed caller.
(handle_connections): The signals are to be handled in the select
and not in the accept. Test all FDs after returning from a
select. Remove the event tests from the accept calls. The select
already assured that the accept won't block.
* Makefile.am (gpg_preset_passphrase_LDADD): Reorder libs so that
pwquery may use stuff from jnlib. Conditionally add -lwsock2
(gpg_protect_tool_LDADD): Ditto.
* preset-passphrase.c (main): Use default_homedir().
(main) [W32]: Initialize sockets.
* simple-pwquery.c (agent_open) [W32]: Implement for W32.
(readline) [W32]: Use recv instead of read.
(writen) [W32]: Use send instead of write.
(my_stpcpy): Define a stpcpy replacement so that this file
continues to be self-contained.
(agent_send_all_options) [W32]: Don't call ttyname.
* gnupg-badge-openpgp.eps, gnupg-badge-openpgp.jpg: New
* gnupg.texi: Add a logo.
* sysnotes.texi: New.
* gpgsm.c (main): Use default_homedir().
(main) [W32]: Default to disabled CRL checks.
* gpgconf-comp.c (get_config_pathname) [DOSISH]: Detect absolute
pathnames with a drive letter.
directories default to c:/gnupg. Require libassuan 0.6.9.
* gpg-agent.c (main) [W32]: Now that Mutexes work we can remove
the pth_init kludge.
(main): Add new options --[no-]use-standard-socket.
(check_for_running_agent): Check whether it is running on the
standard socket.
* sysutils.h [W32]: Define sleep.
* util.h: Add prototype for mkdtemp.
* call-agent.c (start_agent): Before starting a pipe server start
to connect to a server on the standard socket. Use PATHSEP
* call-dirmngr.c (start_dirmngr): Use PATHSEP.
* import.c: Include unistd.h for dup and close.
now use the identical implementation from ../common/membuf.c.
* pksign.c (agent_pksign): Changed arg OUTFP to OUTBUF and use
membuf functions to return the value.
* pkdecrypt.c (agent_pkdecrypt): Ditto.
* genkey.c (agent_genkey): Ditto.
* command.c (cmd_pksign, cmd_pkdecrypt, cmd_genkey): Replaced
assuan_get_data_fp() by a the membuf scheme.
(clear_outbuf, write_and_clear_outbuf): New.
* membuf.c (put_membuf): Wipe out buffer after a failed realloc.
* stringhelp.c (w32_strerror) [W32]: New.
* w32-pth.c, w32-pth.h: Added real code written by Timo Schulz.
Not finished, though.
* gpgconf-comp.c <ignore-ocsp-service-url>: Fixed typo.
* w32-pth.c, w32-pth.h: New.
* Makefile.am (gpgsm_LDADD): Put libassuan before jnlib because
under W32 we need the w32 pth code from jnlib.
* misc.c (setup_pinentry_env) [W32]: Disabled.
* gpgsm.c (run_protect_tool) [_WIN32]: Disabled.
* import.c (popen_protect_tool): Simplified by making use of
gnupg_spawn_process.
(parse_p12): Likewise, using gnupg_wait_process.
* export.c (popen_protect_tool): Ditto.
(export_p12): Ditto.
(enable_core_dumps): New.
* gpgsm.texi (Esoteric Options): Add --debug-allow-core-dump.
* gpgsm.c: New option --debug-allow-core-dump.
* gpgsm.h (opt): Add member CONFIG_FILENAME.
* gpgsm.c (main): Use it here instead of the local var.
* server.c (gpgsm_server): Print some additional information with
the hello in verbose mode.
(export_p12_file): Read a certificate from STDIN and pass it to
p12_build. Detect a keygrip and construct the filename in that
case. Unprotcet a key if needed. Print error messages for key
formats we can't handle.
(release_passphrase): New.
(get_passphrase): New arg PROMPTNO. Return the allocated
string. Changed all callers.
* minip12.c: Revamped the build part.
(p12_build): New args CERT and CERTLEN.
* simple-pwquery.c (agent_open): Don't mangle INFOSTR.
* export.c (export_p12, popen_protect_tool)
(gpgsm_p12_export): New.
* gpgsm.c (main): New command --export-secret-key-p12.
* Makefile.am (libcommon_a_SOURCES): Add xasprintf.c.
* miscellaneous.c (xasprintf): Moved to ...
* xasprintf (xasprintf): ... here. New file.
This allows to use xasprintf without sucking in gpg-error.
* vasprintf.c (vasprintf) [va_copy]: Use va_copy.
[!va_copy && __va_copy]: Use __va_copy.
[!va_copy && !__va_copy]: Only now fall back to using memcpy.
* call-scd.c: Seirialized all scdaeom access when using Pth.
* cache.c: Made the cache Pth-thread-safe.
(agent_unlock_cache_entry): New.
* findkey.c (unprotect): Unlock the returned cache value.
* command.c (cmd_get_passphrase): Ditto.
* gpg-agent.c (main): Register pth_read/write with Assuan.
handle certs-only messages.
* maperror.c (map_gcry_err): Add libgcrypt's new S-expression errors.
(map_ksba_err): Add a few mappings.
* configure.ac: We now require libgcrypt 1.1.7 and libksba 0.4.2.
(gpgsm_validate_path): And call it from here.
* gpgsm.c (main): New options --policy-file,
--disable-policy-checks and --enable-policy-checks.
* gpgsm.h (opt): Added policy_file, no_policy_checks.
name identifies a certificate unambiguously.
(gpgsm_find_cert): Ditto.
* server.c (cmd_listkeys): Check that the data stream is available.
(cmd_listsecretkeys): Ditto.
(has_option): New.
(cmd_sign): Fix ambiguousity in option recognition.
* gpgsm.c (main): Enable --logger-fd.
* encrypt.c (gpgsm_encrypt): Increased buffer size for better
performance.
* call-agent.c (gpgsm_agent_pksign): Check the S-Exp received from
the agent.
* keylist.c (list_cert_colon): Filter out control characters.
