* g10/parse-packet.c (enum_sig_subpkt): Check buflen before reading
the type octet. Print diagnostic.
--
If the final subpacket has only a length header evaluating to zero and
missing the type octet, a read could happen right behind the buffer.
Valgrind detected this. Fix is obvious. Note that the further
parsing of the subpacket is still okay because it always checks the
length. Note further that --list-packets uses a different code path
and already reported an error.
Reported-by: Philippe Antoine
He provided a test file copied below. Running "gpg -v --verify" on it
triggered the bug.
-----BEGIN PGP ARMORED FILE-----
Comment: Use "gpg --dearmor" for unpacking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=qYZP
-----END PGP ARMORED FILE-----
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (parse_plaintext): Fill up the allocated NAME.
--
This actually does not harm because we merely display a buffer
allocated by ourselves. However, we better tell Valgrind about it so
that we don't need to track this thing down ever again.
Test using a corrupted literal data packet:
echo cb 0a 75 ff 59 ae 90 d5 74 65 73 74 | \
undump |\
valgrind gpg --list-packets >/dev/null
Reported-by: Sebastian Schinzel
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/keyring.c (keyring_get_keyblock): Use the parser's packet count
instead of counting ourself.
* g10/packet.h (struct parse_packet_ctx_s): New field
'n_parsed_packets'.
(init_parse_packet): Initialize new field.
* g10/parse-packet.c (parse): Count packets.
--
The 'keyring' keystore depends on the number of packets for delete and
update operations. With the rework of the ring trust packets, the
trust packets were no longer properly accounted for leading to keyring
corruptions.
The 'keybox' store was not affected.
GnuPG-bug-id: 3123
GnuPG-bug-id: 3135
GnuPG-bug-id: 3144
Fixes-commit: a8895c99a7
Signed-off-by: Justus Winter <justus@g10code.com>
* g10/parse-packet.c (can_handle_critical): Add
SIGSUBPKT_REVOC_REASON.
--
Some software seems to mark that subpacket as criticial. Although gpg
has no special treatment for a revocation reasons (except for
--list-packets) we can accept a criticial marked anyway. There are no
mandatary rules specified on how to handle a revocation reason.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c: Use '#if' instead of '#ifdef' when checking
DEBUG_PARSE_PACKET. This fixes the build with '#define
DEBUG_PARSE_PACKET 0'.
Signed-off-by: Justus Winter <justus@g10code.com>
* g10/packet.h (struct parse_packet_ctx_s): Change LAST_PKT deom a
pointer to its struct.
(init_parse_packet): Adjust for LAST_PKT not being a pointer.
* g10/parse-packet.c (parse): Ditto. Free the last packet before
storing a new one in case of a deep link.
(parse_ring_trust): Adjust for LAST_PKT not being a pointer.
* g10/free-packet.c (free_packet): Ditto.
* g10/t-keydb-get-keyblock.c (do_test): Release keyblock.
--
Fixes-commit: afa8680908
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (parse_trust): Rename to ...
(parse_ring_trust): this. Change args and implement new ring trust
packet format.
(parse): Add special ring trust packet handling.
* g10/packet.h (PKT_user_id): New fields KEYUPDATE, UPDATEURL, and
KEYSRC.
(PKT_public_key): Ditto.
(RING_TRUST_SIG, RING_TRUST_KEY, RING_TRUST_UID): New consts.
(PKT_ring_trust): New.
(struct packet_struct): Remove member RING_TRUST.
(strcu parse_packet_ctx_s): Add field SKIP_META.
(init_parse_packet): Init SKIPT_META.
* g10/free-packet.c (release_public_key_parts): Free UDPATEURL.
(free_user_id): Ditto.
* g10/mainproc.c (list_node): Remove printing of non-documented "rtv"
lines.
* g10/build-packet.c (build_packet_and_meta): New.
(do_ring_trust): New.
* g10/export.c (write_keyblock_to_output): Use build_packet_and_meta
in backup mode.
(do_export_one_keyblock): Ditto.
* g10/import.c (read_block): Add arg WITH_META. Skip ring trust
packets if that ism not set.
(import): Call read_block WITH_META in restore mode.
* g10/keydb.h (KEYSRC_UNKNOWN, KEYSRC_FILE, KEYSRC_KS, KEYSRC_PREF_KS)
(KEYSRC_WKD, KEYSRC_WKD_SD, KEYSRC_DANE): New constants. They are not
yet used, though.
* g10/keydb.c (parse_keyblock_image): Allow ring trust packets.
(build_keyblock_image): Ditto. Use build_packet_and_meta.
* g10/keyring.c (keyring_get_keyblock): Remove specila treatment of
ring trust packets.
(write_keyblock): Use build_packet_and_meta. Remove special treatment
of ring trust packets and initialization of the signature caches.
--
This patch introduced the framework to store meta data for keys and
user ids in the keyrings/keyboxes. Ring trust packets are
implementation defined and have always been used in gpg to cache the
signature verification status.
Ring trust packets are only exported with the export option "backup"
and only imported with the import option "restore".
The new code uses a cleaner way to handle the ring trust packets: When
the parser reads a ring trust packet and the previously read packet
matches the type of that ring trust packet, the information is stored
in that previously read packet (signature, user id, or primary key)
and the next packet is read immediately. Thus only the parser sees
the ring trust packets. Ring trust packets are written by using the
new function build_packet_and_meta instead of build_packet. That
function writes a ring trust packet when the needed information is
available.
As a side-effect of this patch the signature status cache works again
and "gpg --check-sigs" is thus much faster.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/packet.h (struct parse_packet_ctx_s): Add fields LAST_PKT and
FREE_LAST_PKT.
(init_parse_packet): Clear them.
(deinit_parse_packet): New macro. Change all users if
init_parse_packet to also call this macro.
* g10/free-packet.c (free_packet): Add arg PARSECTX and handle shallow
packet copies in the context. Change all callers.
* g10/parse-packet.c (parse): Store certain packets in the parse
context.
--
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/packet.h (struct parse_packet_ctx_s): New.
(parse_packet_ctx_t): New type.
(init_parse_packet): New macro.
* g10/parse-packet.c (parse_packet, dbg_parse_packet): Change to take
a parse context. Change all callers to provide a context instead of
directly supplying the input stream.
(search_packet, dbg_search_packet): Ditto.
(copy_all_packets, dbg_copy_all_packets): Init an use a parse context.
(copy_some_packets, dbg_copy_some_packets): Ditto.
(skip_some_packets, dbg_skip_some_packets): Ditto.
--
We will need this change to handle ring packets inside the parser.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/keygen.c (parse_key_parameter_string): Fix handling of PART==1.
(parse_key_parameter_part): Use default key size if only "rsa", "dsa",
or "elg" is given.
--
The first change is the actual fix. The second change avoids the
error "Invalid Curve" when only "rsa" instead of RSA2048 is given.
Fixes-commit: ce29272e24
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/options.h (DBG_MPI): New.
* g10/gpg.c (set_debug): Use macro or extra parens for binary operator.
* g10/parse-packet.c (set_packet_list_mode): Use dbg macro.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (parse_signature): Sanitize the value stored in
SIGNERS_UID.
* g10/mainproc.c (issuer_fpr_string): New.
(check_sig_and_print): Print the signers' UID. Print the issuer
fingerprint in --rfc4880bis mode.
--
Signed-off-by: Werner Koch <wk@gnupg.org>
* common/openpgpdefs.h (SIGSUBPKT_ISSUER_FPR): New.
* g10/build-packet.c (build_sig_subpkt_from_sig): Add arg PKSK and
insert the issuer fpr if needed.
* g10/sign.c (write_signature_packets): Pass signing key.
(make_keysig_packet): Ditto.
(update_keysig_packet): Ditto.
* g10/parse-packet.c (dump_sig_subpkt): Print issuer fpr.
(parse_one_sig_subpkt): Detect issuer fpr.
(can_handle_critical): Add issuer fpr.
* g10/mainproc.c (check_sig_and_print): Try to get key via fingerprint.
* g10/gpgv.c (keyserver_import_fprint): New stub.
* g10/test-stubs.c (keyserver_import_fprint): New stub.
--
This support is enabled with the --rfc4880bis option and intended to
test to recently proposed issuer fpr.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/packet.h (PKT_signature): Add field 'signers_uid'.
* g10/parse-packet.c (parse_signature): Set this field.
* g10/free-packet.c (free_seckey_enc): Free field.
(copy_signature): Copy field.
* g10/mainproc.c (akl_has_wkd_method): New.
(check_sig_and_print): Extend NEWSIG status. If WKD is enabled try to
locate a missing key via the signature's Signer's User ID sub-packet.
Do this right before trying a keyserver lookup.
--
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (parse_key): Check for premature end of salt.
--
This has no security implications because an arbitrary salt could have
also been inset by an attacker.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/keyedit.c (change_passphrase): Remove useless init of ANY.
(keyedit_quick_adduid): Remove useless setting of ERR.
* g10/parse-packet.c (parse_key): Remove PKTLEN from condition because
it has been checked before the loop.
(parse_plaintext): Remove useless init of PKTLEN.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (parse): Use an int to compare to -1. Use
buf32_to_ulong.
--
Regression-due-to: 0add91ae1c
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/packet.h (PKT_signature): Change revkey's type from a struct
revocation_key ** to a struct revocation_key *. Update users.
--
revkey was a pointer into the raw data. But, C doesn't guarantee that
there is no padding. Thus, we copy the data.
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* g10/parse-packet.c (parse): We don't handle copying packets with a
partial body length to an output stream. If this occurs, log an error
and abort.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* g10/parse-packet.c (dbg_copy_all_packets): Check that OUT is not
NULL.
(copy_all_packets): Likewise.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* g10/parse-packet.c (parse_signature): Make sure PKTLEN doesn't
underflow. Be more careful that a read doesn't read more data than
PKTLEN says is available.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* g10/packet.h: Add documentation for functions defined in
parse-packet.c.
* g10/parse-packet.c: Improve comments for many functions.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* g10/packet.h (enum_sig_subpkt): Remove argument RET_N. Update
callers.
* g10/parse-packet.c (enum_sig_subpkt): Remove argument RET_N.
--
Remove the RET_N argument, because it is unused and because it is
meaningless: it's not clear whether it is an offset into SIG->HASHED
or SIG->UNHASHED.
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* g10/parse-packet.c (mpi_read): Improve documentation. Correctly
handle an EOF. On overflow, correctly return the number of bytes read
from the pipeline.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* common/openpgp-oid.c (openpgp_oid_to_curve): Add CANON argument.
* common/util.h: Update.
* g10/import.c (transfer_secret_keys): Follow the change.
* g10/keyid.c (pubkey_string): Likewise.
* g10/keylist.c (list_keyblock_print, list_keyblock_colon): Likewise.
* parse-packet.c (parse_key): Likewise.
* scd/app-openpgp.c (send_key_attr, get_public_key): Likewise.
--
Change the function so that caller can select canonical name of curve
or name for printing. Suggested by wk.
* g10/parse-packet.c (parse): Make the description more accurate when
listing packets: old format packets don't support partial lengths,
only indeterminate lengths (RFC 4880, Section 4.2).
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/parse-packet.c (parse_gpg_control): Replace puts by es_fputs to
LISTFP.
--
Reported-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
This was an oversight from the conversion to estream or a separate
listing stream.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (parse_key): Check PKTLEN before calling mpi_read
et al.
--
Due to the missing length checks PKTLEN may turn negative. Because
PKTLEN is an unsigned int the malloc in read_rest would try to malloc
a too large number and terminate the process with "error reading rest
of packet: Cannot allocate memory".
Reported-by: Hanno Böck.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/parse-packet.c (set_packet_list_mode): Set mpi_print_mode.
* g10/misc.c (mpi_print): Do not print an extra leading zero.
--
This was in older versions possible using "--debug 4" but that was
disabled in 2.1 due to a conflict using this values also for
Libgcrypt. Now the values are dumped either with --debug 4 or using
--list-packets along with --verbose.
Because OpenPGP only uses unsigned integers an extra leading zero will
not be printed anymore.
Signed-off-by: Werner Koch <wk@gnupg.org>
* common/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.
--
Commit 91b826a388 was not enough to
avoid all sign extension on shift problems. Hanno Böck found a case
with an invalid read due to this problem. To fix that once and for
all almost all uses of "<< 24" and "<< 8" are changed by this patch to
use an inline function from host2net.h.
Signed-off-by: Werner Koch <wk@gnupg.org>
