Specify ECDSA constant sizes as constants

[VerusCoin.git] / src / key.h

diff --git a/src/key.h b/src/key.h
index 0bb05482c9ceb7b41ded3ba599c03de4f0108b28..292769098b98e46c0400155fe328e4606fbc8150 100644 (file)
--- a/src/key.h
+++ b/src/key.h
@@ -1,34 +1,35 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
+// Copyright (c) 2009-2014 The Bitcoin Core developers
+// Copyright (c) 2017 The Zcash developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_KEY_H
 #define BITCOIN_KEY_H
 
-#include "allocators.h"
+#include "pubkey.h"
 #include "serialize.h"
+#include "support/allocators/secure.h"
 #include "uint256.h"
 
 #include <stdexcept>
 #include <vector>
 
-struct CExtPubKey;
-class CPubKey;
 
 /** 
  * secp256k1:
- * const unsigned int PRIVATE_KEY_SIZE = 279;
- * const unsigned int PUBLIC_KEY_SIZE  = 65;
- * const unsigned int SIGNATURE_SIZE   = 72;
- *
+ */
+const unsigned int PRIVATE_KEY_SIZE            = 279;
+const unsigned int COMPRESSED_PRIVATE_KEY_SIZE = 214;
+/**
  * see www.keylength.com
  * script supports up to 75 for single byte push
  */
 
 /**
  * secure_allocator is defined in allocators.h
- * CPrivKey is a serialized private key, with all parameters included (279 bytes)
+ * CPrivKey is a serialized private key, with all parameters included
+ * (PRIVATE_KEY_SIZE bytes)
  */
 typedef std::vector<unsigned char, secure_allocator<unsigned char> > CPrivKey;
 
@@ -121,8 +122,11 @@ public:
      */
     CPubKey GetPubKey() const;
 
-    //! Create a DER-serialized signature.
-    bool Sign(const uint256& hash, std::vector<unsigned char>& vchSig) const;
+    /**
+     * Create a DER-serialized signature.
+     * The test_case parameter tweaks the deterministic nonce.
+     */
+    bool Sign(const uint256& hash, std::vector<unsigned char>& vchSig, uint32_t test_case = 0) const;
 
     /**
      * Create a compact signature (65 bytes), which allows reconstructing the used public key.
@@ -134,7 +138,13 @@ public:
     bool SignCompact(const uint256& hash, std::vector<unsigned char>& vchSig) const;
 
     //! Derive BIP32 child key.
-    bool Derive(CKey& keyChild, unsigned char ccChild[32], unsigned int nChild, const unsigned char cc[32]) const;
+    bool Derive(CKey& keyChild, ChainCode &ccChild, unsigned int nChild, const ChainCode& cc) const;
+
+    /**
+     * Verify thoroughly whether a private key and a public key match.
+     * This is done using a different mechanism than just regenerating it.
+     */
+    bool VerifyPubKey(const CPubKey& vchPubKey) const;
 
     //! Load private key and check that public key matches.
     bool Load(CPrivKey& privkey, CPubKey& vchPubKey, bool fSkipCheck);
@@ -147,13 +157,13 @@ struct CExtKey {
     unsigned char nDepth;
     unsigned char vchFingerprint[4];
     unsigned int nChild;
-    unsigned char vchChainCode[32];
+    ChainCode chaincode;
     CKey key;
 
     friend bool operator==(const CExtKey& a, const CExtKey& b)
     {
         return a.nDepth == b.nDepth && memcmp(&a.vchFingerprint[0], &b.vchFingerprint[0], 4) == 0 && a.nChild == b.nChild &&
-               memcmp(&a.vchChainCode[0], &b.vchChainCode[0], 32) == 0 && a.key == b.key;
+               a.chaincode == b.chaincode && a.key == b.key;
     }
 
     void Encode(unsigned char code[74]) const;
@@ -163,7 +173,13 @@ struct CExtKey {
     void SetMaster(const unsigned char* seed, unsigned int nSeedLen);
 };
 
-/** Check that required EC support is available at runtime */
+/** Initialize the elliptic curve support. May not be called twice without calling ECC_Stop first. */
+void ECC_Start(void);
+
+/** Deinitialize the elliptic curve support. No-op if ECC_Start wasn't called first. */
+void ECC_Stop(void);
+
+/** Check that required EC support is available at runtime. */
 bool ECC_InitSanityCheck(void);
 
 #endif // BITCOIN_KEY_H