secp256k1_schnorrsig_sign: initialize zNData to NULL

Bit-Wasp · Aug 26, 2019 · f3cdcda · f3cdcda
1 parent e57439d
commit f3cdcda
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/secp256k1/secp256k1.c b/secp256k1/secp256k1.c
@@ -2033,7 +2033,7 @@ PHP_FUNCTION(secp256k1_schnorrsig_parse)
  * Create an ECDSA signature. */
 PHP_FUNCTION (secp256k1_schnorrsig_sign)
 {
- zval *zCtx, *zSig, *zNData;
+ zval *zCtx, *zSig, *zNData = NULL;
  secp256k1_context *ctx;
  secp256k1_schnorrsig *newsig;
  zend_string *msg32, *seckey;
@@ -2069,7 +2069,11 @@ PHP_FUNCTION (secp256k1_schnorrsig_sign)
  noncefp = php_secp256k1_nonce_function_callback;
  calldata.fci = &fci;
  calldata.fcc = &fcc;
- calldata.data = zNData;
+ if (zNData == NULL) {
+ calldata.data = NULL;
+ } else {
+ calldata.data = zNData;
+ }
  ndata = (void *) &calldata;
  } else {
  noncefp = secp256k1_nonce_function_bipschnorr;