X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fec%2Fecp_mont.c;h=b2de7faea75e9d9a71b065b678abe7087181cd24;hb=dd045d17e711d5988eaac983eadf75e0ea04842d;hp=5db65ae41979ef0bc2329b922fedb1c37b82c57c;hpb=1d5bd6cf71b1e4aedda0264905a9ddc64d8c1d76;p=oweals%2Fopenssl.git

diff --git a/crypto/ec/ecp_mont.c b/crypto/ec/ecp_mont.c
index 5db65ae419..b2de7faea7 100644
--- a/crypto/ec/ecp_mont.c
+++ b/crypto/ec/ecp_mont.c
@@ -1,4 +1,7 @@
 /* crypto/ec/ecp_mont.c */
+/*
+ * Originally written by Bodo Moeller for the OpenSSL project.
+ */
 /* ====================================================================
  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
  *
@@ -7,7 +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
@@ -52,85 +55,254 @@
  * Hudson (tjh@cryptsoft.com).
  *
  */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * Portions of this software developed by SUN MICROSYSTEMS, INC.,
+ * and contributed to the OpenSSL project.
+ */
 
-#include "ec_lcl.h"
+#include <openssl/err.h>
 
+#ifdef OPENSSL_FIPS
+# include <openssl/fips.h>
+#endif
+
+#include "ec_lcl.h"
 
 const EC_METHOD *EC_GFp_mont_method(void)
-	{
-	static const EC_METHOD ret = {
-		ec_GFp_mont_group_init,
-		ec_GFp_mont_group_set_curve_GFp,
-		ec_GFp_mont_group_finish,
-		ec_GFp_mont_group_clear_finish,
-		ec_GFp_mont_group_copy,
-		ec_GFp_simple_group_set_generator,
-		/* TODO: 'set' and 'get' functions for EC_GROUPs */
-		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_mont_field_mul,
-		ec_GFp_mont_field_sqr,
-		ec_GFp_mont_field_encode,
-		ec_GFp_mont_field_decode };
-
-	return &ret;
-	}
+{
+    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();
+#endif
+
+    return &ret;
+}
 
 int ec_GFp_mont_group_init(EC_GROUP *group)
-	{
-	int 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);
+}
+
+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);
+}
+
+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;
+
+ 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;
 
-	ok = ec_GFp_simple_group_init(group);
-	group->field_data = NULL;
-	return ok;
-	}
+    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;
+    }
 
-int ec_GFp_mont_group_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
-/* TODO */
+    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;
 
-void ec_GFp_mont_group_finish(EC_GROUP *group);
-/* TODO */
+    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;
+    }
 
-void ec_GFp_mont_group_clear_finish(EC_GROUP *group);
-/* TODO */
+ 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;
+    }
 
-int ec_GFp_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src);
-/* TODO */
+    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;
+    }
 
-int ec_GFp_mont_field_mul(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
-/* TODO */
+    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;
+    }
 
-int ec_GFp_mont_field_sqr(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
-/* TODO */
+    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;
+    }
 
-int ec_GFp_mont_field_encode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
-/* TODO */
+    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;
+    }
 
-int ec_GFp_mont_field_decode(const EC_GROUP *group, BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
-/* TODO */
+    if (!BN_copy(r, group->field_data2))
+        return 0;
+    return 1;
+}