* g10/build-packet.c (gpg_mpi_write): Strip leading zeroes.
--
This used not to work with opaque MPI as returned by Libgcrypt from
ECC operations. This patch fixes this.
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 91b826a38880fd8a989318585eb502582636ddd8 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>
* g10/build-packet.c (write_fake_data): Take care of a NULL stored as
opaque MPI.
--
Reported-by: Hanno Böck <hanno@hboeck.de>
Test data:
gpg2 --no-default-keyring --keyring FILE --export
With this unpacked data for FILE:
-----BEGIN PGP ARMORED FILE-----
Version: GnuPG v2
Comment: Use "gpg --dearmor" for unpacking
mI0EGRkZGRkZGRkZGRkZGRkBGRkZGRkZGRkZGRkZGQAZGRkZGRkZGRkZGRkZGRkZ
GRkZInzgDbpa/9gQ4wq9////f3Vy81CkyVq3HQaqgZLZOeqPjM7XgGh5hJvAkpec
9wAAAgDHe0FVFbkppJZXP+gFs6z3gobS0qUFeyTtxs+wAgAD
=JDFT
-----END PGP ARMORED FILE-----
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/build-packet.c (do_key): Remove support for building v3 keys.
* g10/parse-packet.c (read_protected_v3_mpi): Remove.
(parse_key): Remove support for v3-keys. Add dedicated warnings for
v3-key packets.
* g10/keyid.c (hash_public_key): Remove v3-key support.
(keyid_from_pk): Ditto.
(fingerprint_from_pk): Ditto.
* g10/options.h (opt): Remove fields force_v3_sigs and force_v4_certs.
* g10/gpg.c (cmd_and_opt_values): Remove oForceV3Sigs, oNoForceV3Sigs,
oForceV4Certs, oNoForceV4Certs.
(opts): Turn --force-v3-sigs, --no-force-v3-sigs, --force-v4-certs,
--no-force-v4-certs int dummy options.
(main): Remove setting of the force_v3_sigs force_v4_certs flags.
* g10/revoke.c (gen_revoke, create_revocation): Always create v4 certs.
* g10/sign.c (hash_uid): Remove support for v3-signatures
(hash_sigversion_to_magic): Ditto.
(only_old_style): Remove this v3-key function.
(write_signature_packets): Remove support for creating v3-signatures.
(sign_file): Ditto.
(sign_symencrypt_file): Ditto.
(clearsign_file): Ditto. Remove code to emit no Hash armor line if
only v3-keys are used.
(make_keysig_packet): Remove arg SIGVERSION and force using
v4-signatures. Change all callers to not pass a value for this arg.
Remove all v3-key related code.
(update_keysig_packet): Remove v3-signature support.
* g10/keyedit.c (sign_uids): Always create v4-signatures.
* g10/textfilter.c (copy_clearsig_text): Remove arg pgp2mode and
change caller.
--
v3 keys are deprecated for about 15 years and due the severe
weaknesses of MD5 it does not make any sense to keep code around to
use these old and broken keys. Users who need to decrypt old messages
should use gpg 1.4 and best re-encrypt them to modern standards.
verification of old (i.e. PGP2) created signatures is thus also not
anymore possible but such signatures have no values anyway - MD5 is
just too broken.
We have also kept support for v3 signatures until now. With the
removal of support for v3 keys it is questionable whether it makes any
sense to keep support for v3-signatures. What we do now is to keep
support for verification of v3-signatures but we force the use of
v4-signatures. The latter makes the --pgp6 and --pgp7 switch a bit
obsolete because those PGP versions require v3-signatures for
messages. These versions of PGP are also really old and not anymore
maintained so they have not received any bug fixes and should not be
used anyway.
Signed-off-by: Werner Koch <wk@gnupg.org>
* common/sexputil.c (get_pk_algo_from_canon_sexp): Change to return a
string.
* g10/keygen.c (check_keygrip): Adjust for change.
* sm/certreqgen-ui.c (check_keygrip): Likewise.
* agent/pksign.c (do_encode_dsa): Remove bogus map_pk_openpgp_to_gcry.
* g10/misc.c (map_pk_openpgp_to_gcry): Remove.
(openpgp_pk_test_algo): Change to a wrapper for openpgp_pk_test_algo2.
(openpgp_pk_test_algo2): Rewrite.
(openpgp_pk_algo_usage, pubkey_nbits): Add support for EdDSA.
(openpgp_pk_algo_name): Rewrite to remove need for gcry calls.
(pubkey_get_npkey, pubkey_get_nskey): Ditto.
(pubkey_get_nsig, pubkey_get_nenc): Ditto.
* g10/keygen.c(do_create_from_keygrip): Support EdDSA.
(common_gen, gen_ecc, ask_keysize, generate_keypair): Ditto.
* g10/build-packet.c (do_key): Ditto.
* g10/export.c (transfer_format_to_openpgp): Ditto.
* g10/getkey.c (cache_public_key): Ditto.
* g10/import.c (transfer_secret_keys): Ditto.
* g10/keylist.c (list_keyblock_print, list_keyblock_colon): Ditto.
* g10/mainproc.c (proc_pubkey_enc): Ditto.
* g10/parse-packet.c (parse_key): Ditto,
* g10/sign.c (hash_for, sign_file, make_keysig_packet): Ditto.
* g10/keyserver.c (print_keyrec): Use openpgp_pk_algo_name.
* g10/pkglue.c (pk_verify, pk_encrypt, pk_check_secret_key): Use only
OpenPGP algo ids and support EdDSA.
* g10/pubkey-enc.c (get_it): Use only OpenPGP algo ids.
* g10/seskey.c (encode_md_value): Ditto.
--
This patch separates Libgcrypt and OpenPGP public key algorithms ids
and in most cases completely removes the Libgcrypt ones. This is
useful because for Libgcrypt we specify the algorithm in the
S-expressions and the public key ids are not anymore needed.
This patch also adds some support for PUBKEY_ALGO_EDDSA which will
eventually be used instead of merging EdDSA with ECDSA. As of now an
experimental algorithm id is used but the plan is to write an I-D so
that we can get a new id from the IETF. Note that EdDSA (Ed25519)
does not yet work and that more changes are required.
The ECC support is still broken right now. Needs to be fixed.
Signed-off-by: Werner Koch <wk@gnupg.org>
* agent/findkey.c (key_parms_from_sexp): Add algo name "ecc".
(agent_is_dsa_key): Ditto.
(agent_is_eddsa_key): New. Not finished, though.
* agent/pksign.c (do_encode_eddsa): New.
(agent_pksign_do): Use gcry_log_debug functions.
* agent/protect.c (agent_protect): Parse a flags parameter.
* g10/keygen.c (gpg_curve_to_oid): Move to ...
* common/openpgp-oid.c (openpgp_curve_to_oid): here and rename.
(oid_ed25519): New.
(openpgp_oid_is_ed25519): New.
(openpgp_oid_to_curve): New.
* common/t-openpgp-oid.c (test_openpgp_oid_is_ed25519): New.
* g10/build-packet.c (gpg_mpi_write): Write the length header also for
opaque MPIs.
(gpg_mpi_write_nohdr): New.
(do_key): Use gpg_mpi_write_nohdr depending on algorithm.
(do_pubkey_enc): Ditto.
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Use
gpg_mpi_write_nohdr.
* g10/export.c (transfer_format_to_openpgp):
* g10/keygen.c (ecckey_from_sexp): Return the error.
(gen_ecc): Repalce arg NBITS by CURVE.
(read_parameter_file): Add keywords "Key-Curve" and "Subkey-Curve".
(ask_curve): New.
(generate_keypair, generate_subkeypair): Use ask_curve.
(do_generate_keypair): Also pass curve name.
* g10/keylist.c (list_keyblock_print, list_keyblock_colon): Print
curve name.
* g10/parse-packet.c (mpi_read): Remove workaround for
Libcgrypt < 1.5.
(parse_key): Fix ECC case. Print the curve name.
* g10/pkglue.c (mpi_from_sexp): Rename to get_mpi_from_sexp.
(pk_verify, pk_check_secret_key): Add special case for Ed25519.
* g10/seskey.c (encode_md_value): Ditto.
* g10/sign.c (do_sign, hash_for, sign_file): Ditto.
--
Be warned that this code is subject to further changes and that the
format will very likely change before a release. There are also known
bugs and missing code.
Signed-off-by: Werner Koch <wk@gnupg.org>
Quite some changes were needed but in the end we have less code than
before. Instead of trying to do everything with MPIs and pass them
back and forth between Libgcrypt and GnuPG, we know use the
S-expression based interface and make heavy use of our opaque MPI
feature.
Encryption, decryption, signing and verification work with
self-generared keys.
Import and export does not yet work; thus it was not possible to check
the test keys at https://sites.google.com/site/brainhub/pgpecckeys .
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.
* keygen.c (gen_card_key): Obviously we should use the creation
date received from SCDAEMON, so that the fingerprints will match.
* sign.c (do_sign): Pass the serialno to the sign code.
* keyid.c (serialno_and_fpr_from_sk): New.
to libgcrypt functions, using shared error codes from libgpg-error,
replacing the old functions we used to have in ../util by those in
../jnlib and ../common, renaming the malloc functions and a couple of
types. Note, that not all changes are listed below becuause they are
too similar and done at far too many places. As of today the code
builds using the current libgcrypt from CVS but it is very unlikely
that it actually works.
* misc.c (checksum_u16_nobug): Removed.
(checksum_u16): Removed the bug emulation.
(checksum_mpi): Ditto.
(checksum_mpi_counted_nbits): Removed and replaced all calls
with checksum_mpi.
* parse-packet.c (read_protected_v3_mpi): New.
(parse_key): Use it here to store it as an opaque MPI.
* seckey-cert.c (do_check): Changed the v3 unprotection to the new
why to store these keys.
(protect_secret_key): Likewise.
* build-packet.c (do_secret_key): And changed the writing.
* encode.c (encode_simple,encode_crypt): Use new style CTB for
compressssed packets when using MDC. We need to do this so that
concatenated messages are properly decrypted. Old style
compression assumes that it is the last packet; given that we
can't determine the length in advance, the uncompressor does not
know where to start. Actually we should use the new CTB always
but this would break PGP 2 compatibility.
* parse-packet.c (parse): Special treatment for new style CTB
compressed packets.
* build-packet.c (do_mdc): Removed. Was not used.
(do_encrypted_mdc): Count the version number and the MDC packet.
g10.c (main): add new --export-options option. Current flags are
"include-non-rfc", "include-local-sigs", "include-attributes", and
"include-sensitive-revkeys".
* options.h, hkp.c (hkp_export), keyserver.c (parse_keyserver_options,
keyserver_spawn): try passing unknown keyserver options to export options,
and if successful, use them when doing a keyserver --send-key.
* build-packet.c (build_sig_subpkt): We do not generate
SIGSUBPKT_PRIV_VERIFY_CACHE anymore.
