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Commit Graph

231 Commits

Author SHA1 Message Date
Werner Koch
7f3ce66ec5
gpg: Remove support for PKA.
* g10/gpg.c (oPrintPKARecords): Remove.
(opts): Remove --print-pka-records.
(main): Remove "pka-lookups","pka-trust-increase" and other PKA stuff.
* g10/options.h (EXPORT_DANE_FORMAT): Remove.
(VERIFY_PKA_LOOKUPS, VERIFY_PKA_TRUST_INCREASE): Remove.
(KEYSERVER_HONOR_PKA_RECORD): Remove.
* g10/packet.h (pka_info_t): Remove.
(PKT_signature): Remove flags.pka_tried and pka_info.
* g10/parse-packet.c (register_known_notation): Remove
"pka-address@gnupg.org".
* g10/pkclist.c (check_signatures_trust): Remove PKA stuff.
* g10/call-dirmngr.c (gpg_dirmngr_get_pka): Remove.
* g10/export.c (parse_export_options): Remove "export-pka".
(do_export): Adjust for this.
(write_keyblock_to_output): Ditto.
(do_export_stream): Ditto.
(print_pka_or_dane_records): Rename to ...
(print_dane_records): this and remove two args. Remove PKA printing.
* g10/free-packet.c (free_seckey_enc, cp_pka_info): Adjust for removed
pka_info field.
* g10/getkey.c (get_pubkey_byname): Make AKL_PKA a dummy.
* g10/keyserver.c: Remove "honor-pka-record".
(keyserver_import_pka): Remove.
* g10/mainproc.c (get_pka_address): Remove.
(pka_uri_from_sig): Remove.
(check_sig_and_print): Remove code for PKA.
--

PKA (Public Key Association) was a DNS based key discovery method
which looked up fingerprint by mail addresses in the DNS.  This goes
back to the conference where DKIM was suggested to show that we
already had a better method for this available with PGP/MIME.  PKA was
was later superseded by an experimental DANE method and is today not
anymore relevant.  It is anyway doubtful whether PKA was ever widely
used.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-02-02 19:53:21 +01:00
NIIBE Yutaka
f5bc945554 gpg,ecc: Handle external representation as SOS with opaque MPI.
* g10/pkglue.h (sexp_extract_param_sos): New.
* g10/build-packet.c (sos_write): New.
(do_key, do_pubkey_enc, do_signature): Use sos_write for ECC.
* g10/export.c (cleartext_secret_key_to_openpgp): Use
sexp_extract_param_sos.
(transfer_format_to_openpgp): Use opaque MPI for ECC.
* g10/keygen.c (ecckey_from_sexp): Use sexp_extract_param_sos.
* g10/keyid.c (hash_public_key): Handle opaque MPI for SOS.
* g10/parse-packet.c (sos_read): New.
(parse_pubkeyenc,parse_signature,parse_key): Use sos_read for ECC.
* g10/pkglue.c (sexp_extract_param_sos): New.
(pk_verify): Handle opaque MPI for SOS.
(pk_encrypt): Use sexp_extract_param_sos.
* g10/seskey.c (encode_session_key): Use opaque MPI.
* g10/sign.c (do_sign): Use sexp_extract_param_sos.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-06-09 10:32:47 +09:00
Werner Koch
5c47e7825b
indent: Some typo and indentation changes for gpg.
--
2020-04-15 22:23:10 +02:00
Werner Koch
6a4443c842
gpg: Make use of the included key block in a signature.
* g10/import.c (read_key_from_file): Rename to ...
(read_key_from_file_or_buffer): this and add new parameters.  Adjust
callers.
(import_included_key_block): New.
* g10/packet.h (PKT_signature): Add field flags.key_block.
* g10/parse-packet.c (parse_signature): Set that flags.
* g10/sig-check.c (check_signature2): Add parm forced_pk and change
all callers.
* g10/mainproc.c (do_check_sig): Ditto.
(check_sig_and_print): Try the included key block if no key is
available.
--

This is is the second part to support the new Key Block subpacket.
The idea is that after having received a signed mail, it is instantly
possible to reply encrypted - without the need for any centralized
infrastructure.

There is one case where this does not work: A signed mail is received
using a specified signer ID (e.g. using gpg --sender option) and the
key block with only that user ID is thus imported.  The next time a
mail is received using the same key but with a different user ID; the
signatures checks out using the key imported the last time.  However,
the new user id is not imported.  Now when trying to reply to that
last mail, no key will be found.  We need to see whether we can update
a key in such a case.

GnuPG-bug-id: 4856
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-13 17:14:34 +01:00
Werner Koch
865d485180
gpg: New option --include-key-block.
* common/openpgpdefs.h (SIGSUBPKT_KEY_BLOCK): New.
* g10/gpg.c (oIncludeKeyBlock): New.
(opts): New option --include-key-block.
(main): Implement.
* g10/options.h (opt): New flag include_key_block.
* g10/parse-packet.c (dump_sig_subpkt): Support SIGSUBPKT_KEY_BLOCK.
(parse_one_sig_subpkt): Ditto.
(can_handle_critical): Ditto.
* g10/sign.c (mk_sig_subpkt_key_block): New.
(write_signature_packets): Call it for data signatures.
--

This patch adds support for a to be proposed OpenPGP ferature:

  Introduce the Key Block subpacket to align OpenPGP with CMS.

  This new subpacket may be used similar to the CertificateSet of
  CMS (RFC-5652) and thus allows to start encrypted communication
  after having received a signed message.  In practice a stripped down
  version of the key should be including having only the key material
  and the self-signatures which are really useful and shall be used by
  the recipient to reply encrypted.

  #### Key Block

  (1 octet with value 0, N octets of key data)

  This subpacket MAY be used to convey key data along with a signature
  of class 0x00, 0x01, or 0x02.  It MUST contain the key used to create
  the signature; either as the primary key or as a subkey.  The key
  SHOULD contain a primary or subkey capable of encryption and the
  entire key must be a valid OpenPGP key including at least one User ID
  packet and the corresponding self-signatures.

  Implementations MUST ignore this subpacket if the first octet does not
  have a value of zero or if the key data does not represent a valid
  transferable public key.

GnuPG-bug-id: 4856
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-13 13:34:49 +01:00
Werner Koch
3ccad75d76
gpg: Print better debug info in case of broken sig subpackets.
* g10/parse-packet.c (enum_sig_subpkt): Print a hexdump.
--

A test key for this is 02DF08F5FD356BF27F5F7B838921B5DCCD15A883 .
A key listing in verbose mode will now yield

  gpg: DBG: buffer shorter than subpacket (10/9/25);\
       dump: 19100d87e54973647cff

The error here is that the packet length is 0x19 but what follows is a
long keyid (subpacket 16) which is shorter.  The debug output might be
helpful to better analyze broken signatures.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-16 14:44:28 +01:00
Werner Koch
b966a7c142
gpg: Fix a recently introduced printf format buglet.
* g10/parse-packet.c (dump_sig_subpkt): Fix format error.

Signed-off-by: Werner Koch <wk@gnupg.org>
2019-09-27 15:57:52 +02:00
Werner Koch
209caaff66
gpg: Prepare parser for the new attestation certificates.
* common/openpgpdefs.h (SIGSUBPKT_ATTST_SIGS): New.
* g10/keydb.h (IS_ATTST_SIGS): New.
(IS_CERT): Include the new one.
* g10/sign.c (mk_notation_policy_etc): Do not put notations into
attestation key signatures.
* g10/parse-packet.c (dump_sig_subpkt): Add new arg digest_algo.
Print the attestation sigs.
(parse_one_sig_subpkt): Support SIGSUBPKT_ATTST_SIGS.
(can_handle_critical): Ditto.
(enum_sig_subpkt): Pass digest algo to dump_sig_subpkt.
--

This change allows to list the new subpacket with --list-packets.
Example output:

  :signature packet: algo 22, keyid C694723A1370EAB1
          version 4, created 1567097576, md5len 0, sigclass 0x16
          digest algo 8, begin of digest ff 0c
          hashed subpkt 2 len 4 (sig created 2019-08-29)
          hashed subpkt 37 len 32 (attst-sigs: 1
                                   A794C6E9CCFE2F34C67E07[...])
          hashed subpkt 33 len 21 (issuer fpr v4 156A3872[...])
          subpkt 16 len 8 (issuer key ID C694723A1370EAB1)
          data: [256 bits]
          data: [256 bits]

GnuPG-bug-id: 4694
Signed-off-by: Werner Koch <wk@gnupg.org>
2019-09-05 21:27:13 +02:00
Werner Koch
e1d9be730c
gpg: Rework the signature subpacket iteration function.
* g10/parse-packet.c (enum_sig_subpkt): Replace first arg by two args
so that the entire signature packet is available.  Change all callers.
(parse_sig_subpkt): Ditto.
--

This patch is a prerequisite to support the new attestation key
signatures.

Signed-off-by: Werner Koch <wk@gnupg.org>
2019-09-05 20:38:23 +02:00
Werner Koch
d7aca1bef6
gpg: Silence some warning messages during -Kv.
* g10/options.h (glo_ctrl): Add flag silence_parse_warnings.
* g10/keylist.c (list_all): Set that during secret key listsings.
* g10/parse-packet.c (unknown_pubkey_warning): If new flag is set do
 not print info message normally emitted inh verbose mode.
(can_handle_critical_notation, enum_sig_subpkt): Ditto.
(parse_signature, parse_key, parse_attribute_subpkts): Ditto.
--

Those messages are annoying because they might be emitted due to
parsing public keys which are latter not shows because the secret part
is missing.  No functional regressions are expected because --verbose
should not change anything.

Note that this suppression is only done if no arguments are given to
the command; that is if a listing of the entire keyring is requested.
Thus to see the earnings anyway, a listing of a single or group of
keys can be requested.

GnuPG-bug-id: 4627
Signed-off-by: Werner Koch <wk@gnupg.org>
2019-08-23 12:50:41 +02:00
Werner Koch
156788a43c
gpg: Do not allow creation of user ids larger than our parser allows.
* g10/parse-packet.c: Move max packet lengths constants to ...
* g10/packet.h: ... here.
* g10/build-packet.c (do_user_id): Return an error if too data is too
large.
* g10/keygen.c (write_uid): Return an error for too large data.
--

This can lead to keyring corruption becuase we expect that our parser
is abale to parse packts created by us.  Test case is

  gpg --batch --passphrase 'abc' -v  \
      --quick-gen-key $(yes 'a'| head -4000|tr -d '\n')

GnuPG-bug-id: 4532
Signed-off-by: Werner Koch <wk@gnupg.org>
2019-05-21 16:25:56 +02:00
Werner Koch
bd6ecbb8f8
gpg: Use just the addrspec from the Signer's UID.
* g10/parse-packet.c (parse_signature): Take only rthe addrspec from a
Signer's UID subpacket.
--

This is to address a problem in the currentr OpenKeychain which put
the entire UID into the subpacket.  For example our Tofu code can only
use the addrspec and not the entire UID.

Reported-by: Wiktor Kwapisiewicz <wiktor@metacode.biz>
Signed-off-by: Werner Koch <wk@gnupg.org>
2019-05-03 10:54:31 +02:00
Werner Koch
01c87d4ce2
gpg: Implement v5 keys and v5 signatures.
* g10/build-packet.c (gpg_mpi_write): New optional arg
R_NWRITTEN.  Allow NULL for OUT.  Change all callers.
(do_key): Support v5 keys.
(build_sig_subpkt_from_sig): Support 32 byte fingerprints.
* g10/parse-packet.c (parse_signature): First try to set the keyid
from the issuer fingerprint.
(parse_key): Support v5 keys.
(create_gpg_control): Better make sure to always allocate the static
size of the struct in case future compilers print warnings.
* g10/keyid.c (hash_public_key): Add v5 support.
(keyid_from_pk): Ditto.
(keyid_from_fingerprint): Ditto.
(fingerprint_from_pk): Ditto.
* g10/keygen.c (KEYGEN_FLAG_CREATE_V5_KEY): New.
(pVERSION, pSUBVERSION): New.
(add_feature_v5): New.
(keygen_upd_std_prefs): Call it.
(do_create_from_keygrip): Add arg keygen_flags and support the v5
flag.
(common_gen): Support the v5 flag.
(parse_key_parameter_part): New flags v4 and v5.
(parse_key_parameter_string): Add args for version and subversion.
(read_parameter_file): New keywords "Key-Version" and
"Subkey-Version".
(quickgen_set_para): Add arg 'version'.
(quick_generate_keypair, generate_keypair): Support version parms.
(do_generate_keypair): Support v5 key flag.
(generate_subkeypair): Ditto.
(generate_card_subkeypair): Preparse for keyflags.
(gen_card_key): Ditto.
* g10/sig-check.c (check_signature2): Add args extrahash and
extrahashlen.
(check_signature_end): Ditto.
(check_signature_end_simple): Ditto.  Use them.
* g10/mainproc.c (proc_plaintext): Put extra hash infor into the
control packet.
(do_check_sig): Add args extrahas and extrahashlen and pass them on.
(issuer_fpr_raw): Support 32 byte fingerprint.
(check_sig_and_print): get extra hash data and pass it on.
--

Note that this is only basic support and requires more fine
tuning/fixing.

Signed-off-by: Werner Koch <wk@gnupg.org>
2019-03-14 11:26:54 +01:00
Werner Koch
c6e2ee0207
gpg: Prepare revocation keys for use with v5 keys.
* g10/packet.h (struct revocation_key): Add field 'fprlen'.
* g10/parse-packet.c (parse_revkeys): Set fprlen and allow for v5
keys.  Also fix reading of unitialized data at place where
MAX_FINGERPRINT_LEN is used.
* g10/revoke.c (gen_desig_revoke): Allow for v5 keys and use fprlen.
Do an explicit compare to avoid reading unitialized data.
* g10/sig-check.c (check_revocation_keys): Use the fprlen.
* g10/getkey.c (merge_selfsigs_main): Do an explicit copy to avoid
reading unitialized data.
* g10/import.c (revocation_present): Use fprlen.
* g10/keyedit.c (show_key_with_all_names): Use fprlen.
(menu_addrevoker): Use fprlen.  Allow for v5 keys.
* g10/keygen.c (keygen_add_revkey): Use fprlen.
(parse_revocation_key): Allow for v5 keys.
* g10/keyid.c (keyid_from_fingerprint): Allow for v5 keys.  Print a
better error message in case of bogus fingerprints.
* g10/keylist.c (print_revokers): Use fprlen.
--

The reading of uninitialized data is harmless but we better fix it to
make valgrind happy.  More serious was that we always passed
MAX_FINGERPRINT_LEN but we will need to support 20 and 32 octet
fingerprints and MAX_FINGERPRINT_LEN would be too large for a v4.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-12-04 15:43:19 +01:00
Daniel Kahn Gillmor
54eb375ff1 all: fix spelling and typos
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
2018-10-24 15:56:18 -04:00
Werner Koch
64a1e86fc0
gpg: Unfinished support for v5 signatures.
* g10/parse-packet.c (parse_signature): Allow for v5 signatures.
* g10/sig-check.c (check_signature_end_simple): Support the 64bit v5
byte count.
* g10/sign.c (hash_sigversion_to_magic): Ditto.
(write_signature_packets): Request v5 sig for v5 keys.  Remove useless
condition.
(make_keysig_packet): Request v5 sig for v5 keys.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-10-24 16:18:27 +02:00
Werner Koch
3da835713f
gpg: New option --known-notation.
* g10/gpg.c (oKnownNotation): New const.
(opts): Add option --known-notation.
(main): Set option.
* g10/parse-packet.c (known_notations_list): New local var.
(register_known_notation): New.
(can_handle_critical_notation): Rewrite to handle the new feature.
Also print the name of unknown notations in verbose mode.
--

GnuPG-bug-id: 4060
Signed-off-by: Werner Koch <wk@gnupg.org>
2018-08-29 09:36:09 +02:00
NIIBE Yutaka
1b309d9f61 g10: Fix undefined behavior when EOF in parsing packet for S2K.
* g10/parse-packet.c (parse_symkeyenc): Use iobuf_get_noeof.
(parse_key): Likewise.

--

When EOF comes at parsing s2k.count, it is possible the value will
be (unsigned long)-1.  Then, the result of S2K_DECODE_COUNT will be
undefined.  This patch fixes undefined behavior.

Reported-by: Philippe Antoine
GnuPG-bug-id: 4093
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2018-08-10 15:29:06 +09:00
Werner Koch
d4dc4245bf
Merge branch 'STABLE-BRANCH-2-2' into master 2018-03-27 08:48:00 +02:00
Werner Koch
34ec012561
doc: Typo fix in comment.
--
2018-03-21 19:45:31 +01:00
Werner Koch
983f7b2acb
gpg: Fix out-of-bound read in subpacket enumeration
* 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>
2018-03-21 19:43:33 +01:00
Werner Koch
8305739fe8
gpg: Fix packet length checking in symkeyenc parser.
* g10/parse-packet.c (parse_symkeyenc): Move error printing to the
end.  Add additional check to cope for the 0je extra bytes needed for
AEAD.
--

Fixes-commit: 9aab9167bc
GnuPG-bug-id: 3780
2018-02-06 17:37:27 +01:00
Werner Koch
9aab9167bc
gpg: Implement AEAD for SKESK packets.
* g10/packet.h (PKT_symkey_enc): Add field aead_algo.
* g10/build-packet.c (do_symkey_enc): Support version 5 packets.
* g10/parse-packet.c (parse_symkeyenc): Ditto.
* g10/encrypt.c (encrypt_symmetric): Force using a random session
key in AEAD mode.
(encrypt_seskey): Add and support arg aead_algo.
(write_symkey_enc): Ditto.
(encrypt_simple): Adjust accordingly.
(encrypt_filter): Ditto.
* g10/gpgcompose.c (sk_esk): For now call encrypt_seskey without AEAD
support.
* g10/mainproc.c (symkey_decrypt_seskey): Support AEAD.  Nver call BUG
but return an error.
(proc_symkey_enc): Call symkey_decrypt_seskey in a bug compatible way.

* g10/import.c (check_prefs): Check AEAD preferences.
* g10/keyedit.c (show_prefs): Print AEAD preferences.
--

For easier debugging this patch also changes some diagnostics to also
print the encryption mode with the cipher algorithm.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-01-23 12:07:57 +01:00
Werner Koch
3f4ca85cb0
gpg: First take on PKT_ENCRYPTED_AEAD.
* common/openpgpdefs.h (PKT_ENCRYPTED_AEAD): New const.
* g10/dek.h (DEK): Increase size of use_aead to 4 bits.
* g10/filter.h (cipher_filter_context_t):  Add new fields for AEAD.
* g10/packet.h (PKT_encrypted): Add fields aead_algo, cipher_algo, and
chunkbyte.
* g10/build-packet.c (do_encrypted_aead): New.
(build_packet): Call it.
* g10/parse-packet.c (dump_sig_subpkt): Handle SIGSUBPKT_PREF_AEAD.
(parse_one_sig_subpkt, can_handle_critical): Ditto.
(parse_encrypted): Clear new PKT_ENCRYPTED fields.
(parse_encrypted_aead): New.
(parse): Call it.
* g10/gpg.c (main): Take care of --rfc4880bis option when checking
compliance.
* g10/cipher-aead.c: Replace the stub by real code.
* g10/decrypt-data.c (decode_filter_ctx_t): Add fields for use with
AEAD.
(aead_set_nonce): New.
(aead_set_ad): New.
(decrypt_data): Support AEAD.
(aead_underflow): New.
(aead_decode_filter): New.
* g10/encrypt.c (use_aead): Make that new fucntion work.
(encrypt_simple): Use default_aead_algo() instead of EAX.
* g10/mainproc.c (proc_encrypted): Support AEAD.
(do_proc_packets): Support PKT_ENCRYPTED_AEAD.
--

This code has seen only a very few manual tests.  Encrypting always
uses a 64k chunks and decryption has not been tested with larger
chunks.  Those small chunks make debugging much faster.

Tests can be done using:

  gpg --rfc4880bis --pinentry-mode=loopback --passphrase abc \
      --force-aead --aead-algo ocb --s2k-mode 0 --cipher AES \
      -v -z 0 --status-fd 2 -c <INFILE >OUTFILE

and

  gpg --rfc4880bis --pinentry-mode=loopback --passphrase=abc \
      --status-fd 2 -v -d <INFILE >OUTFILE

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-01-21 16:30:53 +01:00
Werner Koch
4cf3cc6e3d
gpg: Do not read from uninitialized memory with --list-packets.
* 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>
2017-11-26 18:33:49 +01:00
Werner Koch
fa1155e89e
gpg: New option --key-origin.
* g10/keydb.h (KEYORG_): Rename to KEYORG_.
* g10/packet.h (PKT_user_id): Rename field keysrc to keyorg.  Adjust
users.
(PKT_public_key): Ditto.
(PKT_ring_trust): Ditto.
* g10/options.h (struct opt): Add field key_origin.
* g10/getkey.c (parse_key_origin): New.
* g10/gpg.c (oKeyOrigin): New.
(opts): Add "keys-origin".
(main): Set option.

Signed-off-by: Werner Koch <wk@gnupg.org>
2017-07-13 18:29:01 +02:00
Justus Winter
22739433e9
gpg: Properly account for ring trust packets.
* 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>
2017-05-08 14:33:11 +02:00
NIIBE Yutaka
256e861bce g10: Fix parse_ring_trust.
* g10/parse-packet.c (parse_ring_trust): Fix condition.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2017-04-17 09:33:19 +09:00
Werner Koch
3f6d949011
gpg: Handle critical marked 'Reason for Revocation'.
* 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>
2017-04-03 08:51:52 +02:00
Justus Winter
5e89144cbc
gpg: Consistent use of preprocessor conditionals.
* 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>
2017-03-30 16:13:45 +02:00
Werner Koch
7bf24e8146
gpg: Fix actual leak and possible leaks in the packet parser.
* 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>
2017-03-30 16:01:52 +02:00
Werner Koch
a8895c99a7
gpg: Revamp reading and writing of ring trust packets.
* 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>
2017-03-30 09:07:02 +02:00
Werner Koch
afa8680908
gpg: Extend free_packet to handle a packet parser context.
* 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>
2017-03-29 12:08:31 +02:00
Werner Koch
0526c99164
gpg: Change parse_packet to take a context.
* 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>
2017-03-29 10:06:29 +02:00
NIIBE Yutaka
70aca95d68 Remove -I option to common.
* dirmngr/Makefile.am (AM_CPPFLAGS): Remove -I$(top_srcdir)/common.
* g10/Makefile.am (AM_CPPFLAGS): Ditto.
* g13/Makefile.am (AM_CPPFLAGS): Ditto.
* kbx/Makefile.am (AM_CPPFLAGS): Ditto.
* scd/Makefile.am (AM_CPPFLAGS): Ditto.
* sm/Makefile.am (AM_CPPFLAGS): Ditto.
* tools/Makefile.am (AM_CPPFLAGS): Ditto.
* Throughout: Follow the change.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2017-03-07 20:25:54 +09:00
Werner Koch
522e6f798d
gpg: Fix algo string parsing of --quick-addkey.
* 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>
2016-12-12 10:13:06 +01:00
Neal H. Walfield
522f74f7e3 Improve some comments. 2016-11-29 14:56:00 +01:00
Werner Koch
4d7dc432b5
Change all http://www.gnu.org in license notices to https://
--
2016-11-05 12:02:19 +01:00
Werner Koch
5d43d28aa3
gpg: Put extra parens around bit tests.
* 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>
2016-10-07 07:54:38 +02:00
Justus Winter
6b626824c8 g10: Fix testing for debug flag.
* g10/parse-packet.c (set_packet_list_mode): Fix testing for debug
flag.

Signed-off-by: Justus Winter <justus@g10code.com>
2016-10-06 14:17:55 +02:00
Werner Koch
ed5c1b0b8a
gpg: Print the signer's UID during verification.
* 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>
2016-08-10 19:53:53 +02:00
NIIBE Yutaka
52f65281f9 g10: Fix --list-packets.
* g10/gpg.c (main): Call set_packet_list_mode after assignment of
opt.list_packets.
* g10/mainproc.c (do_proc_packets): Don't stop processing with
--list-packets as the comment says.
* g10/options.h (list_packets): Fix the comment.
* g10/parse-packet.c: Fix the condition for opt.list_packets.

--

Debian-bug-id: 828109
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2016-06-28 15:56:48 +09:00
Werner Koch
955baf0436
gpg: Add experimental support for an issuer fpr.
* 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>
2016-06-20 23:59:18 +02:00
Werner Koch
5ddccf4fc6
doc: Consistently use 'keyserver'.
--
GnuPG-bug-id: 2383

Signed-off-by: Werner Koch <wk@gnupg.org>
2016-06-14 09:06:44 +02:00
Werner Koch
08c82b1b55
gpg: Try Signer's User ID sub-packet with --auto-key-retrieve.
* 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>
2016-06-13 10:40:34 +02:00
Werner Koch
64bfeafa52
gpg: Remove all assert.h and s/assert/log_assert/.
Signed-off-by: Werner Koch <wk@gnupg.org>
2016-04-29 11:05:24 +02:00
Neal H. Walfield
b7b4a1bdd9 gpg: Improve documentation and comments related to OpenPGP packets.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
2016-02-25 21:08:56 +01:00
Neal H. Walfield
903466e124 common: More accurately name function.
* common/iobuf.c (iobuf_set_partial_block_mode): Rename from this...
(iobuf_set_partial_body_length_mode): ... to this.  Update callers.

--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
2016-02-23 20:49:47 +01:00
Werner Koch
85cc7449fb
gpg: Avoid using an uninitialized SALT on premature EOF.
* 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>
2016-01-06 08:48:44 +01:00
Werner Koch
09accc0e3d
gpg: Silence warnings found by static analyzer.
* 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>
2016-01-06 08:45:01 +01:00