Add ecdsa_sign_recoverable to the ctime tests

Author: elichai

src/valgrind_ctime_test.c

@@ -12,6 +12,10 @@
 # include "include/secp256k1_ecdh.h"
 #endif
 
+#if ENABLE_MODULE_RECOVERY
+# include "include/secp256k1_recovery.h"
+#endif
+
 int main(void) {
     secp256k1_context* ctx;
     secp256k1_ecdsa_signature signature;
@@ -24,6 +28,10 @@ int main(void) {
     unsigned char key[32];
     unsigned char sig[74];
     unsigned char spubkey[33];
+#if ENABLE_MODULE_RECOVERY
+    secp256k1_ecdsa_recoverable_signature recoverable_signature;
+    int recid;
+#endif
 
     if (!RUNNING_ON_VALGRIND) {
         fprintf(stderr, "This test can only usefully be run inside valgrind.\n");
@@ -67,6 +75,17 @@ int main(void) {
     CHECK(ret == 1);
 #endif
 
+#if ENABLE_MODULE_RECOVERY
+    /* Test signing a recoverable signature. */
+    VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
+    ret = secp256k1_ecdsa_sign_recoverable(ctx, &recoverable_signature, msg, key, NULL, NULL);
+    VALGRIND_MAKE_MEM_DEFINED(&recoverable_signature, sizeof(recoverable_signature));
+    VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
+    CHECK(ret);
+    CHECK(secp256k1_ecdsa_recoverable_signature_serialize_compact(ctx, sig, &recid, &recoverable_signature));
+    CHECK(recid >= 0 && recid <= 3);
+#endif
+
     VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
     ret = secp256k1_ec_seckey_verify(ctx, key);
     VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));