diff options
author | Bodo Möller <bodo@openssl.org> | 2001-03-11 17:43:07 +0000 |
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committer | Bodo Möller <bodo@openssl.org> | 2001-03-11 17:43:07 +0000 |
commit | 5b054c69552b39c9bbcd3c4275cf168c4f462a3a (patch) | |
tree | fdfb53f4291469b136ed362935ed92c869f8e44e /crypto/ec | |
parent | 10654d3a745a314e9961e62bc25f4a9fbb4a15b3 (diff) |
EC_METHOD based on bn_mont2 (not used in the library)
Diffstat (limited to 'crypto/ec')
-rw-r--r-- | crypto/ec/ecp_mont2.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/crypto/ec/ecp_mont2.c b/crypto/ec/ecp_mont2.c new file mode 100644 index 0000000000..75727287e0 --- /dev/null +++ b/crypto/ec/ecp_mont2.c @@ -0,0 +1,283 @@ +/* unused */ +/* crypto/ec/ecp_mont2.c */ +/* ==================================================================== + * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#define NDEBUG + +#include <openssl/err.h> + +#include "ec_lcl.h" + +#include "../bn/bn_mont2.c" + +int ec_GFp_mont2_group_init(EC_GROUP *); +int ec_GFp_mont2_group_set_curve_GFp(EC_GROUP *, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *); +void ec_GFp_mont2_group_finish(EC_GROUP *); +void ec_GFp_mont2_group_clear_finish(EC_GROUP *); +/* int ec_GFp_mont2_group_copy(EC_GROUP *, const EC_GROUP *); */ +int ec_GFp_mont2_field_mul(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *); +int ec_GFp_mont2_field_sqr(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *); +int ec_GFp_mont2_field_encode(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *); +int ec_GFp_mont2_field_decode(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *); +int ec_GFp_mont2_field_set_to_one(const EC_GROUP *, BIGNUM *r, BN_CTX *); + +const EC_METHOD *EC_GFp_mont2_method(void) + { + static const EC_METHOD ret = { + ec_GFp_mont2_group_init, + ec_GFp_mont2_group_finish, + ec_GFp_mont2_group_clear_finish, + 0 /* ec_GFp_mont2_group_copy */, + ec_GFp_mont2_group_set_curve_GFp, + ec_GFp_simple_group_get_curve_GFp, + ec_GFp_simple_group_set_generator, + ec_GFp_simple_group_get0_generator, + ec_GFp_simple_group_get_order, + ec_GFp_simple_group_get_cofactor, + 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_GFp, + ec_GFp_simple_point_get_affine_coordinates_GFp, + ec_GFp_simple_set_compressed_coordinates_GFp, + ec_GFp_simple_point2oct, + ec_GFp_simple_oct2point, + 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, + ec_GFp_mont2_field_mul, + ec_GFp_mont2_field_sqr, + ec_GFp_mont2_field_encode, + ec_GFp_mont2_field_decode, + ec_GFp_mont2_field_set_to_one }; + + return &ret; + } + + +int ec_GFp_mont2_group_init(EC_GROUP *group) + { + int ok; + + ok = ec_GFp_simple_group_init(group); + group->field_data1 = NULL; + group->field_data2 = NULL; + return ok; + } + + +int ec_GFp_mont2_group_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx) + { + BN_CTX *new_ctx = NULL; + BN_MONTGOMERY *mont = NULL; + BIGNUM *one = NULL; + int ret = 0; + + if (group->field_data1 != NULL) + { + BN_mont_clear_free(group->field_data1); + group->field_data1 = NULL; + } + if (group->field_data2 != 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_new(); + if (mont == NULL) goto err; + if (!BN_mont_set(p, mont, ctx)) + { + ECerr(EC_F_GFP_MONT2_GROUP_SET_CURVE_GFP, ERR_R_BN_LIB); + goto err; + } + one = BN_new(); + if (one == NULL) goto err; + if (!BN_one(one)) goto err; + if (!BN_to_mont(one, mont, ctx)) goto err; + + group->field_data1 = mont; + mont = NULL; + group->field_data2 = one; + one = NULL; + + ret = ec_GFp_simple_group_set_curve_GFp(group, p, a, b, ctx); + + if (!ret) + { + BN_mont_clear_free(group->field_data1); + group->field_data1 = NULL; + BN_free(group->field_data2); + group->field_data2 = NULL; + } + + err: + if (new_ctx != NULL) + BN_CTX_free(new_ctx); + if (mont != NULL) + BN_mont_clear_free(mont); + return ret; + } + + +void ec_GFp_mont2_group_finish(EC_GROUP *group) + { + if (group->field_data1 != NULL) + { + BN_mont_clear_free(group->field_data1); + group->field_data1 = NULL; + } + if (group->field_data2 != NULL) + { + BN_free(group->field_data2); + group->field_data2 = NULL; + } + ec_GFp_simple_group_finish(group); + } + + +void ec_GFp_mont2_group_clear_finish(EC_GROUP *group) + { + if (group->field_data1 != NULL) + { + BN_mont_clear_free(group->field_data1); + group->field_data1 = NULL; + } + if (group->field_data2 != NULL) + { + BN_clear_free(group->field_data2); + group->field_data2 = NULL; + } + ec_GFp_simple_group_clear_finish(group); + } + + +int ec_GFp_mont2_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_MONT2_FIELD_MUL, EC_R_NOT_INITIALIZED); + return 0; + } + + return BN_mont_mod_mul(r, a, b, group->field_data1, ctx); + } + + +int ec_GFp_mont2_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) + { + if (group->field_data1 == NULL) + { + ECerr(EC_F_EC_GFP_MONT2_FIELD_SQR, EC_R_NOT_INITIALIZED); + return 0; + } + + return BN_mont_mod_mul(r, a, a, group->field_data1, ctx); + } + + +int ec_GFp_mont2_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) + { + if (group->field_data1 == NULL) + { + ECerr(EC_F_EC_GFP_MONT2_FIELD_ENCODE, EC_R_NOT_INITIALIZED); + return 0; + } + + if (!BN_copy(r, a)) return 0; + return BN_to_mont(r, (BN_MONTGOMERY *)group->field_data1, ctx); + } + + +int ec_GFp_mont2_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx) + { + if (group->field_data1 == NULL) + { + ECerr(EC_F_EC_GFP_MONT2_FIELD_DECODE, EC_R_NOT_INITIALIZED); + return 0; + } + + if (!BN_copy(r, a)) return 0; + return BN_mont_red(r, (BN_MONTGOMERY *)group->field_data1); + } + + +int ec_GFp_mont2_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx) + { + if (group->field_data2 == NULL) + { + ECerr(EC_F_EC_GFP_MONT2_FIELD_DECODE, EC_R_NOT_INITIALIZED); + return 0; + } + + if (!BN_copy(r, group->field_data2)) return 0; + return 1; + } |