* g10/ecdh.c (pk_ecdh_decrypt): Allocate just the right size of memory
for the session key, simplifying the decrypt process.
--
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/ecdh.c (derive_kek): Use GCRY_KDF_ONESTEP_KDF.
--
This change is not yet enabled. We will be able to use the code when
we update NEED_LIBGCRYPT_VERSION to 1.11.0. Before the update, gpg
compiled with libgcrypt 1.11.0 can't work with older libgcrypt
runtime.
GnuPG-bug-id: 5964
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Now, it's only for
encrytion.
(pk_ecdh_decrypt): Use prepare_ecdh_with_shared_point and move decrypt
code path in original pk_ecdh_encrypt_with_shared_point here.
* g10/pkglue.h (pk_ecdh_encrypt_with_shared_point): Change API.
* g10/pkglue.c (pk_encrypt): Follow the change.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/ecdh.c (build_kdf_params): New.
(pk_ecdh_encrypt_with_shared_point): Use build_kdf_params, and check
things before extract_secret_x.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/ecdh.c (kek_params_table): Use CIPHER_ALGO_AES192 for
ECC strength 384, according to RFC-6637.
--
Reported-by: Trevor Bentley
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* common/logging.c: Do not build any code if we can use the gpgrt_log
functions.
(log_logv_with_prefix): Rename to log_logv_prefix and change order of
args so that this function matches its printf like counterpart
gpgrt_logv_prefix. Change all callers.
(log_debug_with_string): Rename to log_debug_string. Change all
callers.
(log_printhex): Move first arg to end so that this function matches
its printf like counterpart gpgrt_log_printhex. Change all callers.
* common/logging.h: Divert to gpgrt/libgpg-error if we can use the
gpgrt_log functions.
(bug_at): Add inline versions if we can use the gpgrt_log functions.
* configure.ac (GPGRT_ENABLE_LOG_MACROS): Add to AH_BOTTOM.
(mycflags): Add -Wno-format-zero-length.
--
This patch enables the use of the log function from libgpgrt (aka
libgpg-error). Instead of checking a version number, we enable them
depending on macros set by recent gpg-error versions. Eventually the
whole divert stuff can be removed.
The -Wno-format-zero-length is required because log_printhex can be
called with an empty format string. Note that this is fully specified
standard C behaviour.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Returns error when
it's short. Clarify the format. Handle other prefixes correctly.
--
With the scdaemon's change, there is no case NBYTES < SECRET_X_SIZE.
This fixes the break of ECDH with X25519.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Improve handling of
ECDH shared point format.
--
This handles the case where the result comes from scdaemon.
Signed-off-by: Arnaud Fontaine <arnaud.fontaine at ssi.gouv.fr>
* agent/cvt-openpgp.c (get_keygrip): Handle Curve25519.
(convert_secret_key, convert_transfer_key): Ditto.
* common/openpgp-oid.c (oidtable): Add Curve25519.
(oid_crv25519, openpgp_oid_is_crv25519): New.
* common/util.h (openpgp_oid_is_crv25519): New.
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Handle the case
with Montgomery curve which uses x-only coordinate.
* g10/keygen.c (gen_ecc): Handle Curve25519.
(ask_curve): Change the API and second arg is to return subkey algo.
(generate_keypair, generate_subkeypair): Follow chage of ask_curve.
* g10/keyid.c (keygrip_from_pk): Handle Curve25519.
* g10/pkglue.c (pk_encrypt): Handle Curve25519.
* g10/pubkey-enc.c (get_it): Handle the case with Montgomery curve.
* scd/app-openpgp.c (ECC_FLAG_DJB_TWEAK): New.
(send_key_attr): Work with general ECC, Ed25519, and Curve25519.
(get_public_key): Likewise.
(ecc_writekey): Handle flag_djb_tweak.
--
When libgcrypt has Curve25519, GnuPG now supports Curve25519.
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Fix order of args.
--
That bug has been here since the beginning. The entire function needs
a review or be be moved to Libgcrypt.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/misc.c (map_cipher_openpgp_to_gcry): Use explicit mapping and
use enums for the arg and return value.
(map_cipher_gcry_to_openpgp): Ditto.
(openpgp_cipher_blocklen): Use constant macros.
(openpgp_cipher_test_algo): Use mapping function and prepare to
disable algorithms.
(openpgp_cipher_algo_name): Do not use Libgcrypt.
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Replace
CGRY_CIPHER_* by CIPHER_ALGO_*.
* common/openpgpdefs.h (cipher_algo_t): Remove unused
CIPHER_ALGO_DUMMY.
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>
Import and export of secret keys does now work. Encryption has been
fixed to be compatible with the sample messages.
This version tests for new Libgcrypt function and thus needs to be
build with a new Libgcrypt installed.
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.
