scalar_add_b32

Hbomba89 · Jan 23, 2017 · 660c20d · 660c20d
1 parent a18b9c7
commit 660c20d
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Showing 2 changed files with 13 additions and 0 deletions.
diff --git a/ec_pubkey_fast.c b/ec_pubkey_fast.c
@@ -392,6 +392,17 @@ int secp256k1_ec_pubkey_batch_create(unsigned int num, unsigned char (*pub)[65],
   return 0;
 }
 
+int secp256k1_scalar_add_b32(void * out, void * a, void *b) {
+  secp256k1_scalar_t tmp_a, tmp_b;
+
+  secp256k1_scalar_set_b32(&tmp_a, a, NULL);
+  secp256k1_scalar_set_b32(&tmp_b, b, NULL);
+  secp256k1_scalar_add(&tmp_a, &tmp_a, &tmp_b);
+  secp256k1_scalar_get_b32(out, &tmp_a);
+
+  return 0;
+}
+
 inline static void _priv_add(unsigned char *priv, unsigned char add, int p) {
   priv[p] += add;
   if (priv[p] < add) {

diff --git a/ec_pubkey_fast.h b/ec_pubkey_fast.h
@@ -8,6 +8,8 @@ int secp256k1_ec_pubkey_create_precomp(unsigned char *, int *, const unsigned ch
 int secp256k1_ec_pubkey_incr_init(unsigned char *, unsigned int);
 int secp256k1_ec_pubkey_incr(unsigned char *, int *, unsigned char *);
 
+int secp256k1_scalar_add_b32(void *, void *, void *);
+
 void priv_add_uint8(unsigned char *, unsigned char);
 void priv_add_uint32(unsigned char *, unsigned int);