ecc: Add cofactor to domain parameters.
authorNIIBE Yutaka <gniibe@fsij.org>
Fri, 8 Aug 2014 00:35:31 +0000 (09:35 +0900)
committerNIIBE Yutaka <gniibe@fsij.org>
Fri, 8 Aug 2014 00:35:31 +0000 (09:35 +0900)
commit9933b9e5e1a3f5b1019c75f93bd265d4a1ecc270
tree4de3a379b8591f3850f12316610b0c601c2ba42a
parent4ce77b0a810d3c889c07dfb385127d90fa1ae36a
ecc: Add cofactor to domain parameters.

* src/ec-context.h (mpi_ec_ctx_s): Add cofactor 'h'.
* cipher/ecc-common.h (elliptic_curve_t): Add cofactor 'h'.
(_gcry_ecc_update_curve_param): New API adding cofactor.

* cipher/ecc-curves.c (ecc_domain_parms_t): Add cofactor 'h'.
(ecc_domain_parms_t domain_parms): Add cofactors.
(_gcry_ecc_fill_in_curve, _gcry_ecc_update_curve_param)
(_gcry_ecc_get_curve, _gcry_mpi_ec_new, _gcry_ecc_get_param_sexp)
(_gcry_ecc_get_mpi): Handle cofactor.
* cipher/ecc-eddsa.c (_gcry_ecc_eddsa_genkey): Likewise.
* cipher/ecc-misc.c (_gcry_ecc_curve_free)
(_gcry_ecc_curve_copy): Likewise.
* cipher/ecc.c (nist_generate_key, ecc_generate)
(ecc_check_secret_key, ecc_sign, ecc_verify, ecc_encrypt_raw)
(ecc_decrypt_raw, _gcry_pk_ecc_get_sexp, _gcry_pubkey_spec_ecc):
Likewise.
(compute_keygrip): Handle cofactor, but skip it for its computation.
* mpi/ec.c (ec_deinit): Likewise.
* tests/t-mpi-point.c (context_param): Likewise.
(test_curve): Add cofactors.
* tests/curves.c (sample_key_1, sample_key_2): Add cofactors.
* tests/keygrip.c (key_grips): Add cofactors.
--

We keep compatibility of compute_keygrip in cipher/ecc.c.
cipher/ecc-common.h
cipher/ecc-curves.c
cipher/ecc-eddsa.c
cipher/ecc-misc.c
cipher/ecc.c
mpi/ec.c
src/ec-context.h
tests/curves.c
tests/keygrip.c
tests/t-mpi-point.c