diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/ec/ecp_mont.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/ec/ecp_mont.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/ec/ecp_mont.c b/openssl-1.1.0h/crypto/ec/ecp_mont.c new file mode 100644 index 0000000..994cc1d --- /dev/null +++ b/openssl-1.1.0h/crypto/ec/ecp_mont.c @@ -0,0 +1,242 @@ +/* + * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * Portions of this software developed by SUN MICROSYSTEMS, INC., + * and contributed to the OpenSSL project. + */ + +#include <openssl/err.h> + +#include "ec_lcl.h" + +const EC_METHOD *EC_GFp_mont_method(void) +{ + static const EC_METHOD ret = { + EC_FLAGS_DEFAULT_OCT, + NID_X9_62_prime_field, + ec_GFp_mont_group_init, + ec_GFp_mont_group_finish, + ec_GFp_mont_group_clear_finish, + ec_GFp_mont_group_copy, + ec_GFp_mont_group_set_curve, + ec_GFp_simple_group_get_curve, + ec_GFp_simple_group_get_degree, + ec_group_simple_order_bits, + ec_GFp_simple_group_check_discriminant, + ec_GFp_simple_point_init, + ec_GFp_simple_point_finish, + ec_GFp_simple_point_clear_finish, + ec_GFp_simple_point_copy, + ec_GFp_simple_point_set_to_infinity, + ec_GFp_simple_set_Jprojective_coordinates_GFp, + ec_GFp_simple_get_Jprojective_coordinates_GFp, + ec_GFp_simple_point_set_affine_coordinates, + ec_GFp_simple_point_get_affine_coordinates, + 0, 0, 0, + ec_GFp_simple_add, + ec_GFp_simple_dbl, + ec_GFp_simple_invert, + ec_GFp_simple_is_at_infinity, + ec_GFp_simple_is_on_curve, + ec_GFp_simple_cmp, + ec_GFp_simple_make_affine, + ec_GFp_simple_points_make_affine, + 0 /* mul */ , + 0 /* precompute_mult */ , + 0 /* have_precompute_mult */ , + ec_GFp_mont_field_mul, + ec_GFp_mont_field_sqr, + 0 /* field_div */ , + ec_GFp_mont_field_encode, + ec_GFp_mont_field_decode, + ec_GFp_mont_field_set_to_one, + ec_key_simple_priv2oct, + ec_key_simple_oct2priv, + 0, /* set private */ + ec_key_simple_generate_key, + ec_key_simple_check_key, + ec_key_simple_generate_public_key, + 0, /* keycopy */ + 0, /* keyfinish */ + ecdh_simple_compute_key + }; + + return &ret; +} + +int ec_GFp_mont_group_init(EC_GROUP *group) +{ + int ok; + + ok = ec_GFp_simple_group_init(group); + group->field_data1 = NULL; + group->field_data2 = NULL; + return ok; +} + +void ec_GFp_mont_group_finish(EC_GROUP *group) +{ + BN_MONT_CTX_free(group->field_data1); + group->field_data1 = NULL; + BN_free(group->field_data2); + group->field_data2 = NULL; + ec_GFp_simple_group_finish(group); +} + +void ec_GFp_mont_group_clear_finish(EC_GROUP *group) +{ + BN_MONT_CTX_free(group->field_data1); + group->field_data1 = NULL; + BN_clear_free(group->field_data2); + group->field_data2 = NULL; + ec_GFp_simple_group_clear_finish(group); +} + +int ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src) +{ + BN_MONT_CTX_free(dest->field_data1); + dest->field_data1 = NULL; + BN_clear_free(dest->field_data2); + dest->field_data2 = NULL; + + if (!ec_GFp_simple_group_copy(dest, src)) + return 0; + + if (src->field_data1 != NULL) { + dest->field_data1 = BN_MONT_CTX_new(); + if (dest->field_data1 == NULL) + return 0; + if (!BN_MONT_CTX_copy(dest->field_data1, src->field_data1)) + goto err; + } + if (src->field_data2 != NULL) { + dest->field_data2 = BN_dup(src->field_data2); + if (dest->field_data2 == NULL) + goto err; + } + + return 1; + + err: + BN_MONT_CTX_free(dest->field_data1); + dest->field_data1 = NULL; + return 0; +} + +int ec_GFp_mont_group_set_curve(EC_GROUP *group, const BIGNUM *p, + const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) +{ + BN_CTX *new_ctx = NULL; + BN_MONT_CTX *mont = NULL; + BIGNUM *one = NULL; + int ret = 0; + + BN_MONT_CTX_free(group->field_data1); + group->field_data1 = NULL; + BN_free(group->field_data2); + group->field_data2 = NULL; + + if (ctx == NULL) { + ctx = new_ctx = BN_CTX_new(); + if (ctx == NULL) + return 0; + } + + mont = BN_MONT_CTX_new(); + if (mont == NULL) + goto err; + if (!BN_MONT_CTX_set(mont, p, ctx)) { + ECerr(EC_F_EC_GFP_MONT_GROUP_SET_CURVE, ERR_R_BN_LIB); + goto err; + } + one = BN_new(); + if (one == NULL) + goto err; + if (!BN_to_montgomery(one, BN_value_one(), mont, ctx)) + goto err; + + group->field_data1 = mont; + mont = NULL; + group->field_data2 = one; + one = NULL; + + ret = ec_GFp_simple_group_set_curve(group, p, a, b, ctx); + + if (!ret) { + BN_MONT_CTX_free(group->field_data1); + group->field_data1 = NULL; + BN_free(group->field_data2); + group->field_data2 = NULL; + } + + err: + BN_free(one); + BN_CTX_free(new_ctx); + BN_MONT_CTX_free(mont); + return ret; +} + +int ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, + const BIGNUM *b, BN_CTX *ctx) +{ + if (group->field_data1 == NULL) { + ECerr(EC_F_EC_GFP_MONT_FIELD_MUL, EC_R_NOT_INITIALIZED); + return 0; + } + + return BN_mod_mul_montgomery(r, a, b, group->field_data1, ctx); +} + +int ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, + BN_CTX *ctx) +{ + if (group->field_data1 == NULL) { + ECerr(EC_F_EC_GFP_MONT_FIELD_SQR, EC_R_NOT_INITIALIZED); + return 0; + } + + return BN_mod_mul_montgomery(r, a, a, group->field_data1, ctx); +} + +int ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, + const BIGNUM *a, BN_CTX *ctx) +{ + if (group->field_data1 == NULL) { + ECerr(EC_F_EC_GFP_MONT_FIELD_ENCODE, EC_R_NOT_INITIALIZED); + return 0; + } + + return BN_to_montgomery(r, a, (BN_MONT_CTX *)group->field_data1, ctx); +} + +int ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, + const BIGNUM *a, BN_CTX *ctx) +{ + if (group->field_data1 == NULL) { + ECerr(EC_F_EC_GFP_MONT_FIELD_DECODE, EC_R_NOT_INITIALIZED); + return 0; + } + + return BN_from_montgomery(r, a, group->field_data1, ctx); +} + +int ec_GFp_mont_field_set_to_one(const EC_GROUP *group, BIGNUM *r, + BN_CTX *ctx) +{ + if (group->field_data2 == NULL) { + ECerr(EC_F_EC_GFP_MONT_FIELD_SET_TO_ONE, EC_R_NOT_INITIALIZED); + return 0; + } + + if (!BN_copy(r, group->field_data2)) + return 0; + return 1; +} |