1 files changed, 13 insertions, 5 deletions
diff --git a/src/field.h b/src/field.h
index c7feead900..0cdf0fb479 100644
--- a/src/field.h
+++ b/src/field.h
@@ -33,7 +33,10 @@
 #endif
 
 typedef struct {
+#ifndef USE_NUM_NONE
     secp256k1_num_t p;
+#endif
+    secp256k1_fe_t order;
 } secp256k1_fe_consts_t;
 
 static const secp256k1_fe_consts_t *secp256k1_fe_consts = NULL;
@@ -59,8 +62,11 @@ static int secp256k1_fe_is_odd(const secp256k1_fe_t *a);
 /** Compare two field elements. Requires both inputs to be normalized */
 static int secp256k1_fe_equal(const secp256k1_fe_t *a, const secp256k1_fe_t *b);
 
-/** Set a field element equal to 32-byte big endian value. Resulting field element is normalized. */
-static void secp256k1_fe_set_b32(secp256k1_fe_t *r, const unsigned char *a);
+/** Compare two field elements. Requires both inputs to be normalized */
+static int secp256k1_fe_cmp_var(const secp256k1_fe_t *a, const secp256k1_fe_t *b);
+
+/** Set a field element equal to 32-byte big endian value. If succesful, the resulting field element is normalized. */
+static int secp256k1_fe_set_b32(secp256k1_fe_t *r, const unsigned char *a);
 
 /** Convert a field element to a 32-byte big endian value. Requires the input to be normalized */
 static void secp256k1_fe_get_b32(unsigned char *r, const secp256k1_fe_t *a);
@@ -78,7 +84,7 @@ static void secp256k1_fe_add(secp256k1_fe_t *r, const secp256k1_fe_t *a);
 
 /** Sets a field element to be the product of two others. Requires the inputs' magnitudes to be at most 8.
  *  The output magnitude is 1 (but not guaranteed to be normalized). */
-static void secp256k1_fe_mul(secp256k1_fe_t *r, const secp256k1_fe_t *a, const secp256k1_fe_t *b);
+static void secp256k1_fe_mul(secp256k1_fe_t *r, const secp256k1_fe_t *a, const secp256k1_fe_t * SECP256K1_RESTRICT b);
 
 /** Sets a field element to be the square of another. Requires the input's magnitude to be at most 8.
  *  The output magnitude is 1 (but not guaranteed to be normalized). */
@@ -104,11 +110,13 @@ static void secp256k1_fe_inv_all(size_t len, secp256k1_fe_t r[len], const secp25
 /** Potentially faster version of secp256k1_fe_inv_all, without constant-time guarantee. */
 static void secp256k1_fe_inv_all_var(size_t len, secp256k1_fe_t r[len], const secp256k1_fe_t a[len]);
 
-
 /** Convert a field element to a hexadecimal string. */
 static void secp256k1_fe_get_hex(char *r, int *rlen, const secp256k1_fe_t *a);
 
 /** Convert a hexadecimal string to a field element. */
-static void secp256k1_fe_set_hex(secp256k1_fe_t *r, const char *a, int alen);
+static int secp256k1_fe_set_hex(secp256k1_fe_t *r, const char *a, int alen);
+
+/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. */
+static void secp256k1_fe_cmov(secp256k1_fe_t *r, const secp256k1_fe_t *a, int flag);
 
 #endif