Fix null pointer in ec wrapper

src/ripple/crypto/impl/ECDSA.cpp

@@ -71,7 +71,7 @@ static bool ECDSAVerify (uint256 const& hash, std::uint8_t const* sig, size_t si
 
 static bool ECDSAVerify (uint256 const& hash, Blob const& sig, const openssl::ec_key& key)
 {
-    return ECDSAVerify (hash, sig.data(), sig.size(), (EC_KEY*) key.get());
+    return key.valid() && ECDSAVerify (hash, sig.data(), sig.size(), (EC_KEY*) key.get());
 }
 
 bool ECDSAVerify (uint256 const& hash,

src/ripple/crypto/impl/ECDSAKey.cpp

@@ -55,33 +55,34 @@ ec_key ECDSAPrivateKey (uint256 const& serialized)
     }
 
     EC_KEY* key = new_initialized_EC_KEY();
+    ec_key::pointer_t ptr = nullptr;
 
     const bool ok = EC_KEY_set_private_key (key, bn);
 
     BN_clear_free (bn);
 
-    if (! ok)
-    {
+    if (ok)
+        ptr = (ec_key::pointer_t) key;
+    else
         EC_KEY_free (key);
-    }
 
-    return ec_key::acquire ((ec_key::pointer_t) key);
+    return ec_key(ptr);
 }
 
 ec_key ECDSAPublicKey (std::uint8_t const* data, std::size_t size)
 {
     EC_KEY* key = new_initialized_EC_KEY();
+    ec_key::pointer_t ptr = nullptr;
 
     if (o2i_ECPublicKey (&key, &data, size) != nullptr)
     {
         EC_KEY_set_conv_form (key, POINT_CONVERSION_COMPRESSED);
+        ptr = (ec_key::pointer_t) key;
     }
     else
-    {
         EC_KEY_free (key);
-    }
 
-    return ec_key::acquire ((ec_key::pointer_t) key);
+    return ec_key(ptr);
 }
 
 ec_key ECDSAPublicKey (Blob const& serialized)

src/ripple/crypto/impl/ec_key.cpp

@@ -34,8 +34,6 @@ static inline EC_KEY* get_EC_KEY (const ec_key& that)
     return (EC_KEY*) that.get();
 }
 
-const ec_key ec_key::invalid = ec_key::acquire (nullptr);
-
 ec_key::ec_key (const ec_key& that)
 {
     if (that.ptr == nullptr)

src/ripple/crypto/impl/ec_key.h

@@ -31,32 +31,28 @@ class ec_key
 public:
     using pointer_t = struct opaque_EC_KEY*;
 
-private:
-    pointer_t ptr;
-
-    void destroy();
+    ec_key () : ptr(nullptr)
+    {
+    }
 
     ec_key (pointer_t raw) : ptr(raw)
     {
     }
 
-public:
-    static const ec_key invalid;
-
-    static ec_key acquire (pointer_t raw)  { return ec_key (raw); }
-
-    //ec_key() : ptr() {}
-
-    ec_key            (const ec_key&);
-    ec_key& operator= (const ec_key&) = delete;
-
     ~ec_key()
     {
         destroy();
     }
 
+    bool valid() const 
+    {
+        return ptr != nullptr;
+    }
+
     pointer_t get() const  { return ptr; }
 
+    ec_key            (const ec_key&);
+
     pointer_t release()
     {
         pointer_t released = ptr;
@@ -66,7 +62,12 @@ public:
         return released;
     }
 
-    bool valid() const  { return ptr != nullptr; }
+private:
+    pointer_t ptr;
+
+    void destroy();
+
+    ec_key& operator= (const ec_key&) = delete;
 };
 
 } // openssl

src/ripple/crypto/impl/openssl.cpp

@@ -133,7 +133,7 @@ static ec_key ec_key_new_secp256k1_compressed()
 
     EC_KEY_set_conv_form (key, POINT_CONVERSION_COMPRESSED);
 
-    return ec_key::acquire ((ec_key::pointer_t) key);
+    return ec_key((ec_key::pointer_t) key);
 }
 
 void serialize_ec_point (ec_point const& point, std::uint8_t* ptr)