* agent/command-ssh.c (ssh_send_available_keys): Do not bump
key_counter for ignored keys. Also use opt.debug instead of
opt.verbose and fix a memory leak.
--
The error shown by "ssh-add -l" before this fix was:
error fetching identities: incomplete messag
Fixes-commit: 193fcc2f7a8cca5240ce50499c54f99235a87e1c
GnuPG-bug-id: 5996
* agent/command-ssh.c (SSH_OPT_CONSTRAIN_MAXSIGN): New.
(SSH_OPT_CONSTRAIN_EXTENSION): New.
(ssh_handler_add_identity): Ignore them.
(ssh_handler_extension): Take success for session-bind.
--
OpenSSH 8.9 does not gracefully allow communication with older agent
implementations. Until this new OpenSSH feature has been settled we
return a faked response.
Code has not yet been tested.
GnuPG-bug-id: 5931
* agent/command-ssh.c (start_command_handler_ssh): Use es_sysopen.
--
With new (not-yet-released) libgpg-error, gpg-agent should be able to
handle connection from Cygwin version of OpenSSH.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* agent/command-ssh.c (get_client_info): Use type gnupg_fd_t for
socket, until call of socket API.
(start_command_handler_ssh): Don't convert here.
--
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* agent/command-ssh.c (sexp_key_construct): Do not put an empty string
into an S-expression.
(stream_read_string): Do not not try to a read a zero length block.
--
Actually we could handles this different by not putting a comment tag
into the s-expression, however this requires more code and at other
places we already return "(none)" instead of an empty comment.
The second fix is more or less a cosmetic thing to get better error
messages in case the underlying read system call returns an error.
GnuPG-bug-id: 5794
* agent/command-ssh.c (ssh_handler_request_identities): Remove double
check of ERR.
* g10/getkey.c (get_pubkey_byname): Remove double use of break.
* g10/pkglue.c (pk_encrypt): Handle possible NULL-ptr access due to
failed malloc.
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/command-ssh.c (ssh_handler_request_identities): Skip unknown
curves.
--
For example when using my standard ed25519 token and testing cards
with only Brainpool support, the ssh-agent failed due to the unknown
curves seen on the card. This patches fixes this by ignoring keys
with unknown curves.
Signed-off-by: Werner Koch <wk@gnupg.org>
* common/session-env.c (session_env_list_stdenvnames): Extend to allow
return all names as one string.
* agent/command-ssh.c (SSH_REQUEST_EXTENSION): New.
(SSH_RESPONSE_EXTENSION_FAILURE): New.
(request_specs): Add handler for the extension command.
(ssh_handler_extension): New.
--
The extension mechanism is specified in
https://tools.ietf.org/html/draft-miller-ssh-agent-04
Signed-off-by: Werner Koch <wk@gnupg.org>
--
We need to use es_fopen on Windows to cope with non-ascii file names.
This is quite a large but fortunately straightforward change. At a
very few places we keep using stdio (for example due to the use of
popen).
GnuPG-bug-id: 5098
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/command.c (cmd_sethash): Add option --pss and allow for
--hash=null.
* agent/agent.h (struct server_control_s): Add digest.is_pss and
zero where needed.
* agent/pksign.c (agent_pksign_do): Allow for PSS with cards.
* scd/command.c (cmd_pksign): Add for --hash=none.
--
This is not a full implementaion of PSS but allows scdaemon card
drivers to detect already PSS formatted data.
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/call-scd.c: Factor re-usable code out to ...
* agent/call-daemon.c: new. Store infos in an array to allow for
other backend daemons.
* agent/Makefile.am (gpg_agent_SOURCES): Add new file.
* agent/agent.h: Include assuan.h.
(enum daemon_type): New.
(opt): Replace scdaemon_program by daemon_program array. Replace
scd_local by a array d_local. Change users accordingly.
--
The model I'm using for a TPM daemon is the current scdaemon. That
includes start and stop handlers plus liveness checks and an assuan
socket generator. To avoid massive code duplication (and save me a
lot of effort), I've elected to strip this code out of call-scd.c into
a generic framework which can then be reused as is by the TPM handling
daemon.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Co-authored-by: Werner Koch <wk@gnupg.org>
Modified original patch for 2.2 heavily to fit the new framework used
in master (gnupg 2.3)
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/agent.h (struct server_control_s): Add field digest.data.
* agent/gpg-agent.c (agent_deinit_default_ctrl): Free that field.
* agent/command.c (reset_notify): Ditto.
(start_command_handler): ditto.
(cmd_sethash): Add new option --inquire.
* agent/call-scd.c (agent_card_pksign): For now return an error if
inquire mode was used.
* agent/command-ssh.c (ssh_handler_sign_request): Make sure
digest.data is cleared.
* agent/divert-scd.c (divert_pksign): Implement inquire mode.
* agent/pksign.c (agent_pksign_do): Ditto.
--
This is required to support EdDSA according to RFC8410.
GnuPG-bug-id: 4888
No functional changes, just fixing minor spelling issues.
---
Most of these were identified from the command line by running:
codespell \
--ignore-words-list fpr,stati,keyserver,keyservers,asign,cas,iff,ifset \
--skip '*.po,ChangeLog*,help.*.txt,*.jpg,*.eps,*.pdf,*.png,*.gpg,*.asc' \
doc g13 g10 kbx agent artwork scd tests tools am common dirmngr sm \
NEWS README README.maint TODO
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
* agent/call-scd.c (agent_card_serialno): Allow NULL for R_SERIAL.
(struct readkey_status_parm_s): New.
(readkey_status_cb): New.
(agent_card_readkey): Add optional arg R_KEYREF and change all
callers.
* agent/findkey.c (key_parms_from_sexp): Allow also a "public-key".
* agent/divert-scd.c (ask_for_card): Allow for SHADOW_INFO being NULL.
* agent/pksign.c (agent_pksign_do): Fallback to sign with an on-card
if there is no stub key yet. Create the stub key. Also fixed a
misnaming between s_pkey and s_skey.
--
This change allows to create OpenPGP keys directly from a card without
first making sure that a stub key exists. It is also the less
surprising behaviour.
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/command-ssh.c (card_key_available): Supply KEYINFO argument.
Call agent_card_readkey by KEYGRIP of KEYINFO.
Don't use $AUTHKEYID, but IDSTR of KEYINFO.
(ssh_handler_request_identities): Follow the change of
card_key_available.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* agent/command-ssh.c (ssh_key_to_protected_buffer): Update
the length by the second call of gcry_sexp_sprint.
--
GnuPG-bug-id: 4502
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* agent/findkey.c (write_extended_private_key): Add args serialno and
keyref. Write a Token line if that does not yet exist.
(agent_write_private_key): Add args serialno and keyref and change all
callers.
(agent_write_shadow_key): Skip leading spaces.
* agent/keyformat.txt: Improve extended key format docs.
--
Noet that the extended key forma is the defaqult in 2.3. This patch
is a first step to better handle tokens which carray the same key.
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/command-ssh.c (struct ssh_key_type_spec): Add field
alt_curve_name.
(ssh_key_types): Add some alternate curve names.
(ssh_identifier_from_curve_name): Lookup also bey alternative names
and return the canonical name.
(ssh_key_to_blob): Simplify the ECDSA case by using gcry_pk_get_curve
instead of the explicit mapping.
(ssh_receive_key): Likewise. Use ssh_identifier_from_curve_name to
validate the curve name. Remove the reverse mapping because since
GnuPG-2.2 Libgcrypt 1.7 is required.
(ssh_handler_request_identities): Log an error message.
--
This change will make it easier to support other curves, in particular
those from tokens. Libgcrypt has a large list of alias names which we
now use to to make the mapping more flexible.
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/command-ssh.c (get_client_info): Turn client_uid into an int.
Fix setting of it in case of a failed getsocketopt.
* agent/command.c (start_command_handler): Fix setting of the pid and
uid for Windows.
--
Fixes-commit: 28aa6890588cc108639951bb4bef03ac17743046
which obviously was only added to master.
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/command-ssh.c (ssh_handler_sign_request): if a flag is passed
during an signature request that we do not know how to apply, return
GPG_ERR_UNKNOWN_OPTION.
--
https://tools.ietf.org/html/draft-miller-ssh-agent-02#section-4.5 says:
If the agent does not support the requested flags, or is otherwise
unable or unwilling to generate the signature (e.g. because it
doesn't have the specified key, or the user refused confirmation of a
constrained key), it must reply with a SSH_AGENT_FAILURE message.
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
GnuPG-bug-id: 3880
* agent/command-ssh.c: repoint documentation reference.
--
Damien Miller is now documenting the ssh-agent protocol via the IETF.
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
* agent/cache.c (agent_put_cache): Add arg 'ctrl' and change all
callers to pass it.
(agent_get_cache): Ditto.
* agent/cache.c (struct cache_items_s): Add field 'restricted'.
(housekeeping): Adjust debug output.
(agent_flush_cache): Ditto.
(agent_put_cache): Ditto. Take RESTRICTED into account.
(agent_get_cache): Ditto.
--
If requests are coming from different sources they should not share the
same cache. This way we make sure that a Pinentry pops up for a
remote request to a key we have already used locally.
GnuPG-bug-id: 3858
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/command-ssh.c (get_client_info): Use LOCAL_PEERCRED.
--
LOCAL_PEERUID was wrong (while there is LOCAL_PEERUUID).
For FreeBSD and macOS, we can use LOCAL_PEERCRED to get uid.
GnuPG-bug-id: 3757
Fixes-commit: 28aa6890588cc108639951bb4bef03ac17743046
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* configure.ac: Check ucred.h as well as sys/ucred.h.
* agent/command-ssh.c: Add inclusion of ucred.h.
--
It was T2981, adding ucred.h for Solaris. We also need sys/ucred.h
for FreeBSD and macOS.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* agent/agent.h (server_control_s): Add field 'client_uid'.
* agent/call-pinentry.c (start_pinentry): Add uid field to assuan
option "owner" sent to pinentry.
* agent/command-ssh.c (peer_info_s): New static struct.
(get_client_pid): Rename to...
(get_client_info): Here, and extract uid in addition to pid.
(start_command_handler_ssh): Use get_client_info() instead of
get_client_pid().
* agent/command.c (start_command_handler): Try assuan_get_peercred,
and only fall back to assuan_get_pid when assuan_get_peercred fails.
--
This also requires an update to pinentry to handle the new uid field.
Distributing the uid as well as the pid makes it harder for a
different user on the same machine to take advantage of any race
conditions between when a requesting process might ask for something
that needs pinentry, and when pinentry gets around to inspecting the
state of that process.
We put the uid before the nodename because the uid is guaranteed to be
a integer (represented in decimal), which makes it much simpler to
parse past than the potentially arbitrarily structured nodename.
Use a / instead of whitespace to delimit pid/uid at Werner's request.
If we were willing to depend on the nodename being
whitespace-delimited (as the current, unreleased pinentry code does),
then we could add the uid after the nodename. But since no released
pinentry depends on this option anyway, i think we should make the
more conservative, easily-parseable choice and put the user ID first.
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
* agent/command-ssh.c (ssh_key_to_protected_buffer): If the empty
passphrase is supplied, do not protect the key.
GnuPG-bug-id: 2856
Signed-off-by: Justus Winter <justus@g10code.com>
* agent/agent.h (opt): New field 'ssh_fingerprint_digest'.
* agent/command-ssh.c (data_sign, ssh_identity_register): Honor the
option for strings used to communicate with the user.
* agent/findkey.c (agent_modify_description): Likewise.
* agent/gpg-agent.c (cmd_and_opt_values): New value.
(opts): New option '--ssh-fingerprint-digest'.
(parse_rereadable_options): Set the default to MD5 for now.
(main): Handle the new option.
* doc/gpg-agent.texi: Document the new option.
--
OpenSSH has transitioned from using MD5 to compute key fingerprints to
SHA256. This patch makes the digest used when communicating key
fingerprints to the user (e.g. in pinentry dialogs) configurable.
For now this patch conservatively defaults to MD5.
GnuPG-bug-id: 2106
Signed-off-by: Justus Winter <justus@g10code.com>
* agent/command-ssh.c (add_control_entry): Hand in the key, write both
the MD5- and the SHA256-based fingerprint to the 'sshcontrol' file
when adding ssh keys.
(ssh_identity_register): Adapt callsite.
GnuPG-bug-id: 2106
Signed-off-by: Justus Winter <justus@g10code.com>
