diff options
Diffstat (limited to 'comm/third_party/libgcrypt/src/ec-context.h')
| -rw-r--r-- | comm/third_party/libgcrypt/src/ec-context.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/comm/third_party/libgcrypt/src/ec-context.h b/comm/third_party/libgcrypt/src/ec-context.h new file mode 100644 index 0000000000..d1c6480413 --- /dev/null +++ b/comm/third_party/libgcrypt/src/ec-context.h @@ -0,0 +1,106 @@ +/* ec-context.h - Private definitions for CONTEXT_TYPE_EC. + * Copyright (C) 2013 g10 Code GmbH + * + * This file is part of Libgcrypt. + * + * Libgcrypt is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser general Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * Libgcrypt is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef GCRY_EC_CONTEXT_H +#define GCRY_EC_CONTEXT_H + +/* This context is used with all our EC functions. */ +struct mpi_ec_ctx_s +{ + enum gcry_mpi_ec_models model; /* The model describing this curve. */ + + enum ecc_dialects dialect; /* The ECC dialect used with the curve. */ + + int flags; /* Public key flags (not always used). */ + + unsigned int nbits; /* Number of bits. */ + + /* Domain parameters. Note that they may not all be set and if set + the MPIs may be flaged as constant. */ + gcry_mpi_t p; /* Prime specifying the field GF(p). */ + gcry_mpi_t a; /* First coefficient of the Weierstrass equation. */ + gcry_mpi_t b; /* Second coefficient of the Weierstrass equation. */ + gcry_mpi_point_t G; /* Base point (generator). */ + gcry_mpi_t n; /* Order of G. */ + unsigned int h; /* Cofactor. */ + + /* The actual key. May not be set. */ + gcry_mpi_point_t Q; /* Public key. */ + gcry_mpi_t d; /* Private key. */ + + const char *name; /* Name of the curve. */ + + /* This structure is private to mpi/ec.c! */ + struct { + struct { + unsigned int a_is_pminus3:1; + unsigned int two_inv_p:1; + } valid; /* Flags to help setting the helper vars below. */ + + int a_is_pminus3; /* True if A = P - 3. */ + + gcry_mpi_t two_inv_p; + + mpi_barrett_t p_barrett; + + /* Scratch variables. */ + gcry_mpi_t scratch[11]; + + /* Helper for fast reduction. */ + /* int nist_nbits; /\* If this is a NIST curve, the # of bits. *\/ */ + /* gcry_mpi_t s[10]; */ + /* gcry_mpi_t c; */ + } t; + + /* Curve specific computation routines for the field. */ + void (* addm) (gcry_mpi_t w, gcry_mpi_t u, gcry_mpi_t v, mpi_ec_t ctx); + void (* subm) (gcry_mpi_t w, gcry_mpi_t u, gcry_mpi_t v, mpi_ec_t ec); + void (* mulm) (gcry_mpi_t w, gcry_mpi_t u, gcry_mpi_t v, mpi_ec_t ctx); + void (* pow2) (gcry_mpi_t w, const gcry_mpi_t b, mpi_ec_t ctx); + void (* mul2) (gcry_mpi_t w, gcry_mpi_t u, mpi_ec_t ctx); +}; + + +/*-- mpi/ec.c --*/ +void _gcry_mpi_ec_get_reset (mpi_ec_t ec); + + +/*-- cipher/ecc-curves.c --*/ +gcry_mpi_t _gcry_ecc_get_mpi (const char *name, mpi_ec_t ec, int copy); +gcry_mpi_point_t _gcry_ecc_get_point (const char *name, mpi_ec_t ec); +gpg_err_code_t _gcry_ecc_set_mpi (const char *name, + gcry_mpi_t newvalue, mpi_ec_t ec); +gpg_err_code_t _gcry_ecc_set_point (const char *name, + gcry_mpi_point_t newvalue, mpi_ec_t ec); + +/*-- cipher/ecc-misc.c --*/ +gpg_err_code_t _gcry_ecc_sec_decodepoint (gcry_mpi_t value, mpi_ec_t ec, + mpi_point_t result); +gpg_err_code_t _gcry_ecc_mont_decodepoint (gcry_mpi_t pk, mpi_ec_t ctx, + mpi_point_t result); + +/*-- cipher/ecc-eddsa.c --*/ +gpg_err_code_t _gcry_ecc_eddsa_decodepoint (gcry_mpi_t pk, mpi_ec_t ctx, + mpi_point_t result, + unsigned char **r_encpk, + unsigned int *r_encpklen); + + + +#endif /*GCRY_EC_CONTEXT_H*/ |