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author | NIIBE Yutaka <gniibe@fsij.org> | 2014-08-08 09:35:31 +0900 |
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committer | NIIBE Yutaka <gniibe@fsij.org> | 2014-08-08 09:35:31 +0900 |
commit | 9933b9e5e1a3f5b1019c75f93bd265d4a1ecc270 (patch) | |
tree | 4de3a379b8591f3850f12316610b0c601c2ba42a /cipher/ecc-common.h | |
parent | 4ce77b0a810d3c889c07dfb385127d90fa1ae36a (diff) | |
download | libgcrypt-9933b9e5e1a3f5b1019c75f93bd265d4a1ecc270.tar.gz |
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.
Diffstat (limited to 'cipher/ecc-common.h')
-rw-r--r-- | cipher/ecc-common.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/cipher/ecc-common.h b/cipher/ecc-common.h index f066b4b7..83bf20d3 100644 --- a/cipher/ecc-common.h +++ b/cipher/ecc-common.h @@ -32,6 +32,7 @@ typedef struct or d as used by Twisted Edwards curves. */ mpi_point_struct G; /* Base point (generator). */ gcry_mpi_t n; /* Order of G. */ + gcry_mpi_t h; /* Cofactor. */ const char *name; /* Name of the curve or NULL. */ } elliptic_curve_t; @@ -75,7 +76,7 @@ gpg_err_code_t _gcry_ecc_update_curve_param (const char *name, enum ecc_dialects *dialect, gcry_mpi_t *p, gcry_mpi_t *a, gcry_mpi_t *b, gcry_mpi_t *g, - gcry_mpi_t *n); + gcry_mpi_t *n, gcry_mpi_t *h); const char *_gcry_ecc_get_curve (gcry_sexp_t keyparms, int iterator, |