diff options
Diffstat (limited to 'plugins/MirOTR/Libgcrypt/cipher/ecc-common.h')
| -rw-r--r-- | plugins/MirOTR/Libgcrypt/cipher/ecc-common.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/plugins/MirOTR/Libgcrypt/cipher/ecc-common.h b/plugins/MirOTR/Libgcrypt/cipher/ecc-common.h new file mode 100644 index 0000000000..f066b4b785 --- /dev/null +++ b/plugins/MirOTR/Libgcrypt/cipher/ecc-common.h @@ -0,0 +1,142 @@ +/* ecc-common.h - Declarations of common ECC code + * 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_ECC_COMMON_H +#define GCRY_ECC_COMMON_H + + +/* Definition of a curve. */ +typedef struct +{ + enum gcry_mpi_ec_models model;/* The model descrinbing this curve. */ + enum ecc_dialects dialect; /* The dialect used with the curve. */ + 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. + or d as used by Twisted Edwards curves. */ + mpi_point_struct G; /* Base point (generator). */ + gcry_mpi_t n; /* Order of G. */ + const char *name; /* Name of the curve or NULL. */ +} elliptic_curve_t; + + +typedef struct +{ + elliptic_curve_t E; + mpi_point_struct Q; /* Q = [d]G */ +} ECC_public_key; + + +typedef struct +{ + elliptic_curve_t E; + mpi_point_struct Q; + gcry_mpi_t d; +} ECC_secret_key; + + + +/* Set the value from S into D. */ +static inline void +point_set (mpi_point_t d, mpi_point_t s) +{ + mpi_set (d->x, s->x); + mpi_set (d->y, s->y); + mpi_set (d->z, s->z); +} + +#define point_init(a) _gcry_mpi_point_init ((a)) +#define point_free(a) _gcry_mpi_point_free_parts ((a)) + + +/*-- ecc-curves.c --*/ +gpg_err_code_t _gcry_ecc_fill_in_curve (unsigned int nbits, + const char *name, + elliptic_curve_t *curve, + unsigned int *r_nbits); +gpg_err_code_t _gcry_ecc_update_curve_param (const char *name, + enum gcry_mpi_ec_models *model, + enum ecc_dialects *dialect, + gcry_mpi_t *p, gcry_mpi_t *a, + gcry_mpi_t *b, gcry_mpi_t *g, + gcry_mpi_t *n); + +const char *_gcry_ecc_get_curve (gcry_sexp_t keyparms, + int iterator, + unsigned int *r_nbits); +gcry_sexp_t _gcry_ecc_get_param_sexp (const char *name); + +/*-- ecc-misc.c --*/ +void _gcry_ecc_curve_free (elliptic_curve_t *E); +elliptic_curve_t _gcry_ecc_curve_copy (elliptic_curve_t E); +const char *_gcry_ecc_model2str (enum gcry_mpi_ec_models model); +const char *_gcry_ecc_dialect2str (enum ecc_dialects dialect); +gcry_mpi_t _gcry_ecc_ec2os (gcry_mpi_t x, gcry_mpi_t y, gcry_mpi_t p); +gcry_err_code_t _gcry_ecc_os2ec (mpi_point_t result, gcry_mpi_t value); + +mpi_point_t _gcry_ecc_compute_public (mpi_point_t Q, mpi_ec_t ec, + mpi_point_t G, gcry_mpi_t d); + +/*-- ecc.c --*/ + +/*-- ecc-ecdsa.c --*/ +gpg_err_code_t _gcry_ecc_ecdsa_sign (gcry_mpi_t input, ECC_secret_key *skey, + gcry_mpi_t r, gcry_mpi_t s, + int flags, int hashalgo); +gpg_err_code_t _gcry_ecc_ecdsa_verify (gcry_mpi_t input, ECC_public_key *pkey, + gcry_mpi_t r, gcry_mpi_t s); + +/*-- ecc-eddsa.c --*/ +gpg_err_code_t _gcry_ecc_eddsa_recover_x (gcry_mpi_t x, gcry_mpi_t y, int sign, + mpi_ec_t ec); +gpg_err_code_t _gcry_ecc_eddsa_encodepoint (mpi_point_t point, mpi_ec_t ctx, + gcry_mpi_t x, gcry_mpi_t y, + int with_prefix, + unsigned char **r_buffer, + unsigned int *r_buflen); +gpg_err_code_t _gcry_ecc_eddsa_ensure_compact (gcry_mpi_t value, + unsigned int nbits); +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); +gpg_err_code_t _gcry_ecc_eddsa_compute_h_d (unsigned char **r_digest, + gcry_mpi_t d, mpi_ec_t ec); + +gpg_err_code_t _gcry_ecc_eddsa_genkey (ECC_secret_key *sk, + elliptic_curve_t *E, + mpi_ec_t ctx, + gcry_random_level_t random_level); +gpg_err_code_t _gcry_ecc_eddsa_sign (gcry_mpi_t input, + ECC_secret_key *sk, + gcry_mpi_t r_r, gcry_mpi_t s, + int hashalgo, gcry_mpi_t pk); +gpg_err_code_t _gcry_ecc_eddsa_verify (gcry_mpi_t input, + ECC_public_key *pk, + gcry_mpi_t r, gcry_mpi_t s, + int hashalgo, gcry_mpi_t pkmpi); + +/*-- ecc-gost.c --*/ +gpg_err_code_t _gcry_ecc_gost_sign (gcry_mpi_t input, ECC_secret_key *skey, + gcry_mpi_t r, gcry_mpi_t s); +gpg_err_code_t _gcry_ecc_gost_verify (gcry_mpi_t input, ECC_public_key *pkey, + gcry_mpi_t r, gcry_mpi_t s); + + +#endif /*GCRY_ECC_COMMON_H*/ |