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-rw-r--r--crypto/ec/ecp_mont.c457
1 files changed, 221 insertions, 236 deletions
diff --git a/crypto/ec/ecp_mont.c b/crypto/ec/ecp_mont.c
index 3c5ec1965ac8..b2de7faea75e 100644
--- a/crypto/ec/ecp_mont.c
+++ b/crypto/ec/ecp_mont.c
@@ -10,7 +10,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
@@ -64,260 +64,245 @@
#include <openssl/err.h>
#ifdef OPENSSL_FIPS
-#include <openssl/fips.h>
+# include <openssl/fips.h>
#endif
#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_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 };
+{
+ 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_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
+ };
#ifdef OPENSSL_FIPS
- if (FIPS_mode())
- return fips_ec_gfp_mont_method();
+ if (FIPS_mode())
+ return fips_ec_gfp_mont_method();
#endif
- return &ret;
- }
-
+ 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;
- }
+{
+ 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)
- {
- if (group->field_data1 != NULL)
- {
- BN_MONT_CTX_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);
- }
-
+{
+ if (group->field_data1 != NULL) {
+ BN_MONT_CTX_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_mont_group_clear_finish(EC_GROUP *group)
- {
- if (group->field_data1 != NULL)
- {
- BN_MONT_CTX_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);
- }
-
+{
+ if (group->field_data1 != NULL) {
+ BN_MONT_CTX_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_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src)
- {
- if (dest->field_data1 != NULL)
- {
- BN_MONT_CTX_free(dest->field_data1);
- dest->field_data1 = NULL;
- }
- if (dest->field_data2 != 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;
+{
+ if (dest->field_data1 != NULL) {
+ BN_MONT_CTX_free(dest->field_data1);
+ dest->field_data1 = NULL;
+ }
+ if (dest->field_data2 != 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:
- if (dest->field_data1 != NULL)
- {
- 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;
-
- if (group->field_data1 != NULL)
- {
- BN_MONT_CTX_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_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;
- }
+ if (dest->field_data1 != NULL) {
+ 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;
+
+ if (group->field_data1 != NULL) {
+ BN_MONT_CTX_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_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:
- if (new_ctx != NULL)
- BN_CTX_free(new_ctx);
- if (mont != NULL)
- 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;
- }
+ if (new_ctx != NULL)
+ BN_CTX_free(new_ctx);
+ if (mont != NULL)
+ 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;
+}