X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=src%2Fbase58.h;h=d92054da042004c8009d182718e9b0e9e0d36ad0;hb=b2de28c74040595fa3fe5353ea063a8c3874f6b1;hp=c2729d477018bf9a0e441abc0580d60f7657abc9;hpb=18cf214528d14692941311be154214cab1772ed5;p=novacoin.git

diff --git a/src/base58.h b/src/base58.h
index c2729d4..d92054d 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -1,6 +1,7 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2011 The Bitcoin Developers
 // Distributed under the MIT/X11 software license, see the accompanying
-// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 
 //
@@ -20,7 +21,7 @@
 
 static const char* pszBase58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
 
-
+// Encode a byte sequence as a base58-encoded string
 inline std::string EncodeBase58(const unsigned char* pbegin, const unsigned char* pend)
 {
     CAutoBN_CTX pctx;
@@ -61,11 +62,14 @@ inline std::string EncodeBase58(const unsigned char* pbegin, const unsigned char
     return str;
 }
 
+// Encode a byte vector as a base58-encoded string
 inline std::string EncodeBase58(const std::vector<unsigned char>& vch)
 {
     return EncodeBase58(&vch[0], &vch[0] + vch.size());
 }
 
+// Decode a base58-encoded string psz into byte vector vchRet
+// returns true if decoding is succesful
 inline bool DecodeBase58(const char* psz, std::vector<unsigned char>& vchRet)
 {
     CAutoBN_CTX pctx;
@@ -112,6 +116,8 @@ inline bool DecodeBase58(const char* psz, std::vector<unsigned char>& vchRet)
     return true;
 }
 
+// Decode a base58-encoded string str into byte vector vchRet
+// returns true if decoding is succesful
 inline bool DecodeBase58(const std::string& str, std::vector<unsigned char>& vchRet)
 {
     return DecodeBase58(str.c_str(), vchRet);
@@ -120,7 +126,7 @@ inline bool DecodeBase58(const std::string& str, std::vector<unsigned char>& vch
 
 
 
-
+// Encode a byte vector to a base58-encoded string, including checksum
 inline std::string EncodeBase58Check(const std::vector<unsigned char>& vchIn)
 {
     // add 4-byte hash check to the end
@@ -130,6 +136,8 @@ inline std::string EncodeBase58Check(const std::vector<unsigned char>& vchIn)
     return EncodeBase58(vch);
 }
 
+// Decode a base58-encoded string psz that includes a checksum, into byte vector vchRet
+// returns true if decoding is succesful
 inline bool DecodeBase58Check(const char* psz, std::vector<unsigned char>& vchRet)
 {
     if (!DecodeBase58(psz, vchRet))
@@ -149,6 +157,8 @@ inline bool DecodeBase58Check(const char* psz, std::vector<unsigned char>& vchRe
     return true;
 }
 
+// Decode a base58-encoded string str that includes a checksum, into byte vector vchRet
+// returns true if decoding is succesful
 inline bool DecodeBase58Check(const std::string& str, std::vector<unsigned char>& vchRet)
 {
     return DecodeBase58Check(str.c_str(), vchRet);
@@ -158,53 +168,156 @@ inline bool DecodeBase58Check(const std::string& str, std::vector<unsigned char>
 
 
 
+// Base class for all base58-encoded data
+class CBase58Data
+{
+protected:
+    // the version byte
+    unsigned char nVersion;
 
-#define ADDRESSVERSION   ((unsigned char)(fTestNet ? 111 : 0))
+    // the actually encoded data
+    std::vector<unsigned char> vchData;
 
-inline std::string Hash160ToAddress(uint160 hash160)
-{
-    // add 1-byte version number to the front
-    std::vector<unsigned char> vch(1, ADDRESSVERSION);
-    vch.insert(vch.end(), UBEGIN(hash160), UEND(hash160));
-    return EncodeBase58Check(vch);
-}
+    CBase58Data()
+    {
+        nVersion = 0;
+        vchData.clear();
+    }
 
-inline bool AddressToHash160(const char* psz, uint160& hash160Ret)
-{
-    std::vector<unsigned char> vch;
-    if (!DecodeBase58Check(psz, vch))
-        return false;
-    if (vch.empty())
-        return false;
-    unsigned char nVersion = vch[0];
-    if (vch.size() != sizeof(hash160Ret) + 1)
-        return false;
-    memcpy(&hash160Ret, &vch[1], sizeof(hash160Ret));
-    return (nVersion <= ADDRESSVERSION);
-}
+    ~CBase58Data()
+    {
+        // zero the memory, as it may contain sensitive data
+        if (!vchData.empty())
+            memset(&vchData[0], 0, vchData.size());
+    }
 
-inline bool AddressToHash160(const std::string& str, uint160& hash160Ret)
-{
-    return AddressToHash160(str.c_str(), hash160Ret);
-}
+    void SetData(int nVersionIn, const void* pdata, size_t nSize)
+    {
+        nVersion = nVersionIn;
+        vchData.resize(nSize);
+        if (!vchData.empty())
+            memcpy(&vchData[0], pdata, nSize);
+    }
 
-inline bool IsValidBitcoinAddress(const char* psz)
-{
-    uint160 hash160;
-    return AddressToHash160(psz, hash160);
-}
+    void SetData(int nVersionIn, const unsigned char *pbegin, const unsigned char *pend)
+    {
+        SetData(nVersionIn, (void*)pbegin, pend - pbegin);
+    }
 
-inline bool IsValidBitcoinAddress(const std::string& str)
-{
-    return IsValidBitcoinAddress(str.c_str());
-}
+public:
+    bool SetString(const char* psz)
+    {
+        std::vector<unsigned char> vchTemp;
+        DecodeBase58Check(psz, vchTemp);
+        if (vchTemp.empty())
+        {
+            vchData.clear();
+            nVersion = 0;
+            return false;
+        }
+        nVersion = vchTemp[0];
+        vchData.resize(vchTemp.size() - 1);
+        if (!vchData.empty())
+            memcpy(&vchData[0], &vchTemp[1], vchData.size());
+        memset(&vchTemp[0], 0, vchTemp.size());
+        return true;
+    }
 
+    bool SetString(const std::string& str)
+    {
+        return SetString(str.c_str());
+    }
 
+    std::string ToString() const
+    {
+        std::vector<unsigned char> vch(1, nVersion);
+        vch.insert(vch.end(), vchData.begin(), vchData.end());
+        return EncodeBase58Check(vch);
+    }
 
+    int CompareTo(const CBase58Data& b58) const
+    {
+        if (nVersion < b58.nVersion) return -1;
+        if (nVersion > b58.nVersion) return  1;
+        if (vchData < b58.vchData)   return -1;
+        if (vchData > b58.vchData)   return  1;
+        return 0;
+    }
 
-inline std::string PubKeyToAddress(const std::vector<unsigned char>& vchPubKey)
+    bool operator==(const CBase58Data& b58) const { return CompareTo(b58) == 0; }
+    bool operator<=(const CBase58Data& b58) const { return CompareTo(b58) <= 0; }
+    bool operator>=(const CBase58Data& b58) const { return CompareTo(b58) >= 0; }
+    bool operator< (const CBase58Data& b58) const { return CompareTo(b58) <  0; }
+    bool operator> (const CBase58Data& b58) const { return CompareTo(b58) >  0; }
+};
+
+// base58-encoded bitcoin addresses
+// Addresses have version 0 or 111 (testnet)
+// The data vector contains RIPEMD160(SHA256(pubkey)), where pubkey is the serialized public key
+class CBitcoinAddress : public CBase58Data
 {
-    return Hash160ToAddress(Hash160(vchPubKey));
-}
+public:
+    bool SetHash160(const uint160& hash160)
+    {
+        SetData(fTestNet ? 111 : 0, &hash160, 20);
+        return true;
+    }
+
+    bool SetPubKey(const std::vector<unsigned char>& vchPubKey)
+    {
+        return SetHash160(Hash160(vchPubKey));
+    }
+
+    bool IsValid() const
+    {
+        unsigned int nExpectedSize = 20;
+        bool fExpectTestNet = false;
+        switch(nVersion)
+        {
+            case 0:
+                break;
+
+            case 111:
+                fExpectTestNet = true;
+                break;
+
+            default:
+                return false;
+        }
+        return fExpectTestNet == fTestNet && vchData.size() == nExpectedSize;
+    }
+
+    CBitcoinAddress()
+    {
+    }
+
+    CBitcoinAddress(uint160 hash160In)
+    {
+        SetHash160(hash160In);
+    }
+
+    CBitcoinAddress(const std::vector<unsigned char>& vchPubKey)
+    {
+        SetPubKey(vchPubKey);
+    }
+
+    CBitcoinAddress(const std::string& strAddress)
+    {
+        SetString(strAddress);
+    }
+
+    CBitcoinAddress(const char* pszAddress)
+    {
+        SetString(pszAddress);
+    }
+
+    uint160 GetHash160() const
+    {
+        assert(vchData.size() == 20);
+        uint160 hash160;
+        memcpy(&hash160, &vchData[0], 20);
+        return hash160;
+    }
+};
 
 #endif