X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=src%2Fkey.cpp;h=1ed4e25087db9e8786db0a40170f5aef19efe1ae;hb=128b5cec3c7f20b34a40541be2236c11fe204df6;hp=6657ffd70b328e6f47edd79722a99bedbf5ad7b6;hpb=3e59ebf3286bcd620e6ff79fa84eb9aa50a6c59e;p=novacoin.git

diff --git a/src/key.cpp b/src/key.cpp
index 6657ffd..1ed4e25 100644
--- a/src/key.cpp
+++ b/src/key.cpp
@@ -463,20 +463,17 @@ bool CPubKey::SetCompactSignature(uint256 hash, const std::vector<unsigned char>
     ECDSA_SIG *sig = ECDSA_SIG_new();
     BN_bin2bn(&vchSig[1],32,sig->r);
     BN_bin2bn(&vchSig[33],32,sig->s);
-
+    bool fSuccessful = false;
     EC_KEY* pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
     if (nV >= 31)
     {
         nV -= 4;
         EC_KEY_set_conv_form(pkey, POINT_CONVERSION_COMPRESSED);
     }
-
     do
     {
         if (ECDSA_SIG_recover_key_GFp(pkey, sig, (unsigned char*)&hash, sizeof(hash), nV - 27, 0) != 1)
             break;
-        ECDSA_SIG_free(sig);
-
         int nSize = i2o_ECPublicKey(pkey, NULL);
         if (!nSize)
             break;
@@ -485,13 +482,14 @@ bool CPubKey::SetCompactSignature(uint256 hash, const std::vector<unsigned char>
         if (i2o_ECPublicKey(pkey, &pbegin) != nSize)
             break;
         Set(vchPubKey.begin(), vchPubKey.end());
-        return IsValid();
+        fSuccessful = IsValid();
 
     } while (false);
-
     ECDSA_SIG_free(sig);
-    Invalidate();
-    return false;
+    EC_KEY_free(pkey);
+    if (!fSuccessful)
+        Invalidate();
+    return fSuccessful;
 }
 
 bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchSig) const
@@ -499,35 +497,37 @@ bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchS
     if (vchSig.empty() || !IsValid())
         return false;
 
-    const unsigned char* pbegin = &vbytes[0];
     EC_KEY *pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
-    if (!o2i_ECPublicKey(&pkey, &pbegin, size()))
-        return false; // Unable to parse public key
-
-    // New versions of OpenSSL will reject non-canonical DER signatures. de/re-serialize first.
-    unsigned char *norm_der = NULL;
     ECDSA_SIG *norm_sig = ECDSA_SIG_new();
-    const unsigned char* sigptr = &vchSig[0];
+
     assert(norm_sig);
-    if (d2i_ECDSA_SIG(&norm_sig, &sigptr, vchSig.size()) == NULL)
+    assert(pkey);
+
+    bool ret = false;
+    do
     {
-        /* As of OpenSSL 1.0.0p d2i_ECDSA_SIG frees and nulls the pointer on
-        * error. But OpenSSL's own use of this function redundantly frees the
-        * result. As ECDSA_SIG_free(NULL) is a no-op, and in the absence of a
-        * clear contract for the function behaving the same way is more
-        * conservative.
-        */
-        ECDSA_SIG_free(norm_sig);
-        return false;
-    }
-    int derlen = i2d_ECDSA_SIG(norm_sig, &norm_der);
+        int derlen;
+        uint8_t *norm_der = NULL;
+        const uint8_t* pbegin = &vbytes[0];
+        const uint8_t* sigptr = &vchSig[0];
+
+        // Trying to parse public key
+        if (!o2i_ECPublicKey(&pkey, &pbegin, size()))
+            break;
+        // New versions of OpenSSL are rejecting a non-canonical DER signatures, de/re-serialize first.
+        if (d2i_ECDSA_SIG(&norm_sig, &sigptr, vchSig.size()) == NULL)
+            break;
+        if ((derlen = i2d_ECDSA_SIG(norm_sig, &norm_der)) <= 0)
+            break;
+
+        // -1 = error, 0 = bad sig, 1 = good
+        ret = ECDSA_verify(0, (const unsigned char*)&hash, sizeof(hash), norm_der, derlen, pkey) == 1;
+        OPENSSL_free(norm_der);
+    } while(false);
+
     ECDSA_SIG_free(norm_sig);
-    if (derlen <= 0)
-        return false;
+    EC_KEY_free(pkey);
 
-    // -1 = error, 0 = bad sig, 1 = good
-    bool ret = ECDSA_verify(0, (unsigned char*)&hash, sizeof(hash), norm_der, derlen, pkey) == 1;
-    OPENSSL_free(norm_der);
     return ret;
 }