Remove some unneeded code

[openssl.git] / crypto / ec / ecp_nistp224.c

diff --git a/crypto/ec/ecp_nistp224.c b/crypto/ec/ecp_nistp224.c
index 0eea2e005d0996a0420b33c9834028b3545fd826..9a9b8a445ea89b984ae19c837577634d73a73770 100644 (file)
--- a/crypto/ec/ecp_nistp224.c
+++ b/crypto/ec/ecp_nistp224.c
@@ -1,6 +1,12 @@
 /*
- * Written by Emilia Kasper (Google) for the OpenSSL project.
+ * Copyright 2010-2017 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 2011 Google Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -44,7 +50,6 @@ typedef __uint128_t uint128_t;  /* nonstandard; implemented by gcc on 64-bit
 
 typedef uint8_t u8;
 typedef uint64_t u64;
-typedef int64_t s64;
 
 /******************************************************************************/
 /*-
@@ -73,7 +78,7 @@ typedef limb felem[4];
 typedef widelimb widefelem[7];
 
 /*
- * Field element represented as a byte arrary. 28*8 = 224 bits is also the
+ * Field element represented as a byte array. 28*8 = 224 bits is also the
  * group order size for the elliptic curve, and we also use this type for
  * scalars for point multiplication.
  */
@@ -230,7 +235,8 @@ static const felem gmul[2][16][3] = {
 /* Precomputation for the group generator. */
 struct nistp224_pre_comp_st {
     felem g_pre_comp[2][16][3];
-    int references;
+    CRYPTO_REF_COUNT references;
+    CRYPTO_RWLOCK *lock;
 };
 
 const EC_METHOD *EC_GFp_nistp224_method(void)
@@ -330,7 +336,7 @@ static int BN_to_felem(felem out, const BIGNUM *bn)
     /* BN_bn2bin eats leading zeroes */
     memset(b_out, 0, sizeof(b_out));
     num_bytes = BN_num_bytes(bn);
-    if (num_bytes > sizeof b_out) {
+    if (num_bytes > sizeof(b_out)) {
         ECerr(EC_F_BN_TO_FELEM, EC_R_BIGNUM_OUT_OF_RANGE);
         return 0;
     }
@@ -349,8 +355,8 @@ static BIGNUM *felem_to_BN(BIGNUM *out, const felem in)
 {
     felem_bytearray b_in, b_out;
     felem_to_bin28(b_in, in);
-    flip_endian(b_out, b_in, sizeof b_out);
-    return BN_bin2bn(b_out, sizeof b_out, out);
+    flip_endian(b_out, b_in, sizeof(b_out));
+    return BN_bin2bn(b_out, sizeof(b_out), out);
 }
 
 /******************************************************************************/
@@ -693,7 +699,7 @@ static limb felem_is_zero(const felem in)
     return (zero | two224m96p1 | two225m97p2);
 }
 
-static limb felem_is_zero_int(const felem in)
+static int felem_is_zero_int(const void *in)
 {
     return (int)(felem_is_zero(in) & ((limb) 1));
 }
@@ -1216,22 +1222,40 @@ static NISTP224_PRE_COMP *nistp224_pre_comp_new()
         ECerr(EC_F_NISTP224_PRE_COMP_NEW, ERR_R_MALLOC_FAILURE);
         return ret;
     }
+
     ret->references = 1;
+
+    ret->lock = CRYPTO_THREAD_lock_new();
+    if (ret->lock == NULL) {
+        ECerr(EC_F_NISTP224_PRE_COMP_NEW, ERR_R_MALLOC_FAILURE);
+        OPENSSL_free(ret);
+        return NULL;
+    }
     return ret;
 }
 
 NISTP224_PRE_COMP *EC_nistp224_pre_comp_dup(NISTP224_PRE_COMP *p)
 {
+    int i;
     if (p != NULL)
-        CRYPTO_add(&p->references, 1, CRYPTO_LOCK_EC_PRE_COMP);
+        CRYPTO_UP_REF(&p->references, &i, p->lock);
     return p;
 }
 
 void EC_nistp224_pre_comp_free(NISTP224_PRE_COMP *p)
 {
-    if (p == NULL
-        || CRYPTO_add(&p->references, -1, CRYPTO_LOCK_EC_PRE_COMP) > 0)
+    int i;
+
+    if (p == NULL)
         return;
+
+    CRYPTO_DOWN_REF(&p->references, &i, p->lock);
+    REF_PRINT_COUNT("EC_nistp224", x);
+    if (i > 0)
+        return;
+    REF_ASSERT_ISNT(i < 0);
+
+    CRYPTO_THREAD_lock_free(p->lock);
     OPENSSL_free(p);
 }
 
@@ -1260,9 +1284,10 @@ int ec_GFp_nistp224_group_set_curve(EC_GROUP *group, const BIGNUM *p,
         if ((ctx = new_ctx = BN_CTX_new()) == NULL)
             return 0;
     BN_CTX_start(ctx);
-    if (((curve_p = BN_CTX_get(ctx)) == NULL) ||
-        ((curve_a = BN_CTX_get(ctx)) == NULL) ||
-        ((curve_b = BN_CTX_get(ctx)) == NULL))
+    curve_p = BN_CTX_get(ctx);
+    curve_a = BN_CTX_get(ctx);
+    curve_b = BN_CTX_get(ctx);
+    if (curve_b == NULL)
         goto err;
     BN_bin2bn(nistp224_curve_params[0], sizeof(felem_bytearray), curve_p);
     BN_bin2bn(nistp224_curve_params[1], sizeof(felem_bytearray), curve_a);
@@ -1340,7 +1365,6 @@ static void make_points_affine(size_t num, felem points[ /* num */ ][3],
                                              sizeof(felem),
                                              tmp_felems,
                                              (void (*)(void *))felem_one,
-                                             (int (*)(const void *))
                                              felem_is_zero_int,
                                              (void (*)(void *, const void *))
                                              felem_assign,
@@ -1392,10 +1416,11 @@ int ec_GFp_nistp224_points_mul(const EC_GROUP *group, EC_POINT *r,
         if ((ctx = new_ctx = BN_CTX_new()) == NULL)
             return 0;
     BN_CTX_start(ctx);
-    if (((x = BN_CTX_get(ctx)) == NULL) ||
-        ((y = BN_CTX_get(ctx)) == NULL) ||
-        ((z = BN_CTX_get(ctx)) == NULL) ||
-        ((tmp_scalar = BN_CTX_get(ctx)) == NULL))
+    x = BN_CTX_get(ctx);
+    y = BN_CTX_get(ctx);
+    z = BN_CTX_get(ctx);
+    tmp_scalar = BN_CTX_get(ctx);
+    if (tmp_scalar == NULL)
         goto err;
 
     if (scalar != NULL) {
@@ -1575,7 +1600,9 @@ int ec_GFp_nistp224_precompute_mult(EC_GROUP *group, BN_CTX *ctx)
         if ((ctx = new_ctx = BN_CTX_new()) == NULL)
             return 0;
     BN_CTX_start(ctx);
-    if (((x = BN_CTX_get(ctx)) == NULL) || ((y = BN_CTX_get(ctx)) == NULL))
+    x = BN_CTX_get(ctx);
+    y = BN_CTX_get(ctx);
+    if (y == NULL)
         goto err;
     /* get the generator */
     if (group->generator == NULL)