* include/host2net.h (buf16_to_ulong, buf16_to_uint): New.
(buf16_to_ushort, buf16_to_u16): New.
(buf32_to_size_t, buf32_to_ulong, buf32_to_uint, buf32_to_u32): New.
--
This fixes sign extension on shift problems. Hanno Böck found a case
with an invalid read due to this problem. To fix that almost all uses
of "<< 24" and "<< 8" are changed by this patch to use an inline
function from host2net.h.
(back ported from commit 2183683bd6)
Signed-off-by: Werner Koch <wk@gnupg.org>
[dkg: rebased to STABLE-BRANCH-1-4]
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
* g10/parse-packet.c (parse_trust): Always allocate a packet.
--
Reported-by: Hanno Böck <hanno@hboeck.de>
Signed-off-by: Werner Koch <wk@gnupg.org>
(back ported from commit 3997848786)
[dkg: rebased to STABLE-BRANCH-1-4]
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
* g10/parse-packet.c (MAX_KEY_PACKET_LENGTH): New.
(MAX_UID_PACKET_LENGTH): New.
(MAX_COMMENT_PACKET_LENGTH): New.
(MAX_ATTR_PACKET_LENGTH): New.
(parse_key): Limit the size of a key packet to 256k.
(parse_user_id): Use macro for the packet size limit.
(parse_attribute): Ditto.
(parse_comment): Ditto.
--
Without that it is possible to force gpg to allocate large amounts of
memory by using a bad encoded MPI. This would be an too easy DoS.
Another way to mitigate would be to change the MPI read function to
allocate memory dynamically while reading the MPI. However, that
complicates and possibly slows down the code. A too large key packet
is in any case a sign for broken data and thus gpg should not use it.
Reported-by: Hanno Böck
GnuPG-bug-id: 1823
Signed-off-by: Werner Koch <wk@gnupg.org>
(back ported from commit 382ba4b137)
[dkg: rebased to STABLE-BRANCH-1-4]
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
* g10/parse-packet.c (can_handle_critical): Check content length
before calling can_handle_critical_notation.
--
The problem was found by Jan Bee and gniibe proposed the used fix.
Thanks.
This bug can't be exploited: Only if the announced length of the
notation is 21 or 32 a memcmp against fixed strings using that length
would be done. The compared data is followed by the actual signature
and thus it is highly likely that not even read of unallocated memory
will happen. Nevertheless such a bug needs to be fixed.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (dump_sig_subpkt): Print regex subpacket
sanitized.
--
We may not use "%s" to print an arbitrary buffer. At least "%.*s"
should have been used. However, it is in general preferable to escape
control characters while printf user data.
Reported-by: Hanno Böck
Signed-off-by: Werner Koch <wk@gnupg.org>
(backported from commit 596ae9f543)
* g10/parse-packet.c (parse_attribute_subpkts): Check that the
attribute packet is large enough for the subpacket type.
--
Reported-by: Hanno Böck
Signed-off-by: Werner Koch <wk@gnupg.org>
(backported from commit 0988764397)
* g10/parse-packet.c (parse_key): Add keyid printing.
--
This is backport from GnuPG-2. Note that the --list-packets command
is for debugging only and not part iof the stable API.
Signed-off-by: Werner Koch <wk@gnupg.org>
This prevents a memory allocation attack with a very large user ID. A
very large packet length could even cause the allocation (a u32) to wrap
around to a small number. Noted by Evgeny Legerov on full-disclosure.
(build_sig_subpkt_from_sig), getkey.c (fixup_uidnode,
merge_selfsigs_main, merge_selfsigs_subkey), keygen.c
(keygen_add_key_expire): Fix meaning of key expiration and sig
expiration subpackets - zero means "never expire" according to 2440,
not "expire instantly".
cleaning from one convenient place.
* options.h, import.c (parse_import_options, clean_sigs_from_all_uids,
import_one): Reduce clean options to two: clean and minimize.
* parse-packet.c (setup_user_id): Remove. (parse_user_id,
parse_attribute): Just use xmalloc_clear instead.
parse_attribute_subpkts): Make a number of warnings verbose items.
These fire on many slightly mangled keys in the field, so the
warning is becoming burdensome.
selfsig into both the pk and sk, so that someone importing their sk (which
will get an autoconvert to the pk) won't end up with two selfsigs.
(do_generate_keypair): Call it from here.
* parse-packet.c (can_handle_critical_notation): New. Check for
particular notation tags that we will accept when critical. Currently,
that's only preferred-email-encoding@pgp.com, since we know how to handle
it (pass it through to a mail program). (can_handle_critical): Call it
from here. (parse_one_sig_subpkt): Sanity check that notations are
well-formed in that the internal lengths add up to the size of the
subpacket.
* parse-packet.c (skip_rest): Removed. Changed all callers to use
the new iobuf_skip_reset. Orginal patch by Florian Weimer.
* iobuf.c (iobuf_skip_rest): New. Orginal patch by Florian
Weimer. Added new argument PARTIAL.
continuing confusion and make room for possible changes in devel.
* parse-packet.c (parse_plaintext): Show the hex value for the literal
packet mode since it may not be printable.
* keygen.c (make_backsig): Make sure that the backsig was built
successfully before we try and use it.
* status.h, status.c (get_status_string), plaintext.c (handle_plaintext):
New status tags PLAINTEXT and PLAINTEXT_LENGTH.
backsigs.
* getkey.c (merge_selfsigs_subkey): Find 0x19 backsigs on subkey selfsigs
and verify they are valid. If DO_BACKSIGS is not defined, fake this as
always valid.
* packet.h, parse-packet.c (parse_signature): Make parse_signature
non-static so we can parse 0x19s in self-sigs.
* main.h, sig-check.c (check_backsig): Check a 0x19 signature.
(signature_check2): Give a backsig warning if there is no or a bad 0x19
with signatures from a subkey.
length mode and change all callers. (do_plaintext): Turn off partial
length encoding now that we're done writing the packet. (do_comment,
do_user_id): Try for a headerlen of 2 since that's the smallest and most
likely encoding for these packets.
* parse-packet.c (parse): Remove call to start old gpg partial length
mode.
(copy_packet, skip_packet, skip_rest, read_rest, parse_plaintext,
parse_encrypted, parse_gpg_control): Use a flag to indicate partial or
indeterminate encoding. This is the first step in some minor surgery to
remove the old gpg partial length encoding.
along with a zero length, interpret this as an actual zero length packet
and not as an indeterminate length packet. (do_comment, do_user_id): Use
it here as these packets might be naturally zero length.
* parse-packet.c (parse): Show packet type when failing due to an
indeterminate length packet.
* misc.c (parse_options): Only provide args for the true (i.e. not
"no-xxx") form of options.
* encode.c (encode_simple): Allow for 32 bytes (256 bits) of symmetrically
encrypted session key. Use --s2k-cipher-algo to choose cipher, rather
than the default cipher.
* parse-packet.c (parse_subkeyenc): Give a warning if an symmetrically
encrypted session key is seen without salt. Show in --list-packets if a
symetrically encrypted session key is present.
* pubkey-enc.c (get_it): Always show cipher-not-in-prefs warning unless
--quiet is set. Use text name of cipher in warning.
displays - one if the key is not present (to tell the user where to get
the key), the other if it is present (to tell the user where the key can
be refreshed).
* packet.h, parse-packet.c (parse_signature): Set flag if a preferred
keyserver is present.
* keylist.c (list_keyblock_print): Show keyserver url in listings with
list-option show-keyserver-url.
Provide a signing-key-is-revoked flag. Change all callers.
* status.h, status.c (get_status_string): New REVKEYSIG status tag for a
good signature from a revoked key.
* mainproc.c (do_check_sig, check_sig_and_print): Use it here.
* import.c (import_revoke_cert, merge_blocks, merge_sigs): Compare actual
signatures on import rather than using keyid or class matching. This does
not change actual behavior with a key, but does mean that all sigs are
imported whether they will be used or not.
* parse-packet.c (parse_signature): Don't give "signature packet without
xxxx" warnings for experimental pk algorithms. An experimental algorithm
may not have a notion of (for example) a keyid (i.e. PGP's x.509 stuff).
unhashed signature cache any longer.
* misc.c (pct_expando): Add two new expandos - signer's fingerprint (%g),
and signer's primary fingerprint (%p).
* Makefile.am: Include W32LIBS where appropriate.
* g10.c (main): Add --rfc2440 alias for --openpgp since in a few months,
they won't be the same thing.
* keyserver.c (parse_keyserver_uri): Accept "http" as an alias for "hkp",
since it is occasionally written that way. (keyserver_spawn): Use
ascii_isspace to avoid locale issues.
* keygen.c (ask_user_id): Make --allow-freeform-uid apply to the email
field as well as the name field, and allow mixing fields when it is set.
* options.skel: Use subkeys.pgp.net as the default keyserver.
* trustdb.c (validate_one_keyblock): Certifications on revoked or expired
uids do not count in the web of trust.
* signal.c (init_one_signal, pause_on_sigusr, do_block): Only use
sigprocmask() if we have sigset_t, and only use sigaction() if we have
struct sigaction. This is for Forte c89 on Solaris which seems to define
only the function call half of the two pairs by default.
(pause_on_sigusr): Typo. (do_block): If we can't use sigprocmask() and
sigset_t, try to get the number of signals from NSIG as well as MAXSIG,
and if we can't, fail with an explanation.
* signal.c, tdbio.c: Comment out the transaction code. It was not used in
this version, and was causing some build problems on quasi-posix platforms
(Solaris and Forte c89).
* keylist.c (list_keyblock_colon): Don't include validity values when
listing secret keys since they can be incorrect and/or misleading. This
is a temporary kludge, and will be handled properly in 1.9/2.0.
* mainproc.c (check_sig_and_print): Only show the "key available from"
preferred keyserver line if the key is not currently present.
* keyedit.c (sign_uids): Do not sign expired uids without --expert (same
behavior as revoked uids). Do not allow signing a user ID without a
self-signature. --expert overrides. Add additional prompt to the
signature level question. (menu_expire): When changing expiration dates,
don't replace selfsigs on revoked uids since this would effectively
unrevoke them. There is also no point in replacing expired selfsigs.
This is bug #181
* g10.c (add_notation_data): Make sure that only ascii is passed to
iscntrl. Noted by Christian Biere.
* getkey.c (classify_user_id2): Replaced isspace by spacep
* keygen.c (ask_user_id): Ditto. (get_parameter_algo): Ditto.
* keyedit.c (keyedit_menu): Ditto.
* tdbdump.c (import_ownertrust): Ditto. s/isxdigit/hexdigitp/.
* revoke.c (ask_revocation_reason):
* keyserver.c (keyserver_spawn): Dito.
they at least handle subkeys correctly.
* options.h, g10.c (main), main.h, keylist.c (show_keyserver_url),
mainproc.c (check_sig_and_print), parse-packet.c (dump_sig_subpkt,
parse_one_sig_subpkt, can_handle_critical): Add read-only support for
preferred keyserver subpackets. They're basically policy URLs with a
different name. Add a verify-option "show-preferred-keyserver" to turn
them on and off (on by default, as per stable branch).
* g10.c (main): Add "--set-notation" as alias to "--notation-data" this is
to make things consistent with --set-policy-url meaning both sigs and
certs.
getkey.c, keydb.c, openfile.c, plaintext.c, status.c, gpgv.c, keygen.c,
options.h, sig-check.c, tdbio.h, encode.c, mainproc.c, parse-packet.c,
signal.c, textfilter.c: Edit all preprocessor instructions to remove
whitespace before the '#'. This is not required by C89, but there are some
compilers out there that don't like it.
is_disabled to cache_disabled_value, which now takes a pk and not just the
keyid. This is for speed since there is no need to re-fetch a key when we
already have that key handy. Cache the result of the check so we don't
need to hit the trustdb more than once.
* getkey.c (skip_disabled): New function to get a pk and call is_disabled
on it. (key_byname): Use it here.
* packet.h, getkey.c (skip_disabled), keylist.c (print_capabilities): New
"pk_is_disabled" macro to retrieve the cached disabled value if available,
and fill it in via cache_disabled_value if not available.
* trustdb.c (get_validity): Cache the disabled value since we have it
handy and it might be useful later.
* parse-packet.c (parse_key): Clear disabled flag when parsing a new key.
Just in case someone forgets to clear the whole key.
* getkey.c (merge_selfsigs_main): Add an "if all else fails" path for
setting a single user ID primary when there are multiple set primaries all
at the same second, or no primaries set and the most recent user IDs are
at the same second, or no signed user IDs at all. This is arbitrary, but
deterministic.
* exec.h, photoid.h: Add copyright message.
* keylist.c (list_keyblock_print): Don't dump attribs for
revoked/expired/etc uids for non-colon key listings. This is for
consistency with --show-photos.
* main.h, keylist.c (dump_attribs), mainproc.c (check_sig_and_print): Dump
attribs if --attrib-fd is set when verifying signatures.
* g10.c (main): New --gnupg option to disable the various --openpgp,
--pgpX, etc. options. This is the same as --no-XXXX for those options.
* revoke.c (ask_revocation_reason): Clear old reason if user elects to
repeat question. This is bug 153.
* keyedit.c (sign_uids): Show keyid of the key making the signature.
