Merge pull request #4165

f6b7c64 Move base58.h implementation code to base58.cpp (Pieter Wuille)

Author: laanwj

src/base58.cpp

@@ -2,11 +2,18 @@
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include "base58.h"
+
+#include "hash.h"
+#include "uint256.h"
+
 #include <assert.h>
 #include <stdint.h>
 #include <string.h>
 #include <vector>
 #include <string>
+#include <boost/variant/apply_visitor.hpp>
+#include <boost/variant/static_visitor.hpp>
 
 /* All alphanumeric characters except for "0", "I", "O", and "l" */
 static const char* pszBase58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
@@ -89,3 +96,179 @@ std::string EncodeBase58(const unsigned char* pbegin, const unsigned char* pend)
         str += pszBase58[*(it++)];
     return str;
 }
+
+std::string EncodeBase58(const std::vector<unsigned char>& vch) {
+    return EncodeBase58(&vch[0], &vch[0] + vch.size());
+}
+
+bool DecodeBase58(const std::string& str, std::vector<unsigned char>& vchRet) {
+    return DecodeBase58(str.c_str(), vchRet);
+}
+
+std::string EncodeBase58Check(const std::vector<unsigned char>& vchIn) {
+    // add 4-byte hash check to the end
+    std::vector<unsigned char> vch(vchIn);
+    uint256 hash = Hash(vch.begin(), vch.end());
+    vch.insert(vch.end(), (unsigned char*)&hash, (unsigned char*)&hash + 4);
+    return EncodeBase58(vch);
+}
+
+bool DecodeBase58Check(const char* psz, std::vector<unsigned char>& vchRet) {
+    if (!DecodeBase58(psz, vchRet))
+        return false;
+    if (vchRet.size() < 4)
+    {
+        vchRet.clear();
+        return false;
+    }
+    // re-calculate the checksum, insure it matches the included 4-byte checksum
+    uint256 hash = Hash(vchRet.begin(), vchRet.end()-4);
+    if (memcmp(&hash, &vchRet.end()[-4], 4) != 0)
+    {
+        vchRet.clear();
+        return false;
+    }
+    vchRet.resize(vchRet.size()-4);
+    return true;
+}
+
+bool DecodeBase58Check(const std::string& str, std::vector<unsigned char>& vchRet) {
+    return DecodeBase58Check(str.c_str(), vchRet);
+}
+
+CBase58Data::CBase58Data() {
+    vchVersion.clear();
+    vchData.clear();
+}
+
+void CBase58Data::SetData(const std::vector<unsigned char> &vchVersionIn, const void* pdata, size_t nSize) {
+    vchVersion = vchVersionIn;
+    vchData.resize(nSize);
+    if (!vchData.empty())
+        memcpy(&vchData[0], pdata, nSize);
+}
+
+void CBase58Data::SetData(const std::vector<unsigned char> &vchVersionIn, const unsigned char *pbegin, const unsigned char *pend) {
+    SetData(vchVersionIn, (void*)pbegin, pend - pbegin);
+}
+
+bool CBase58Data::SetString(const char* psz, unsigned int nVersionBytes) {
+    std::vector<unsigned char> vchTemp;
+    DecodeBase58Check(psz, vchTemp);
+    if (vchTemp.size() < nVersionBytes) {
+        vchData.clear();
+        vchVersion.clear();
+        return false;
+    }
+    vchVersion.assign(vchTemp.begin(), vchTemp.begin() + nVersionBytes);
+    vchData.resize(vchTemp.size() - nVersionBytes);
+    if (!vchData.empty())
+        memcpy(&vchData[0], &vchTemp[nVersionBytes], vchData.size());
+    OPENSSL_cleanse(&vchTemp[0], vchData.size());
+    return true;
+}
+
+bool CBase58Data::SetString(const std::string& str) {
+    return SetString(str.c_str());
+}
+
+std::string CBase58Data::ToString() const {
+    std::vector<unsigned char> vch = vchVersion;
+    vch.insert(vch.end(), vchData.begin(), vchData.end());
+    return EncodeBase58Check(vch);
+}
+
+int CBase58Data::CompareTo(const CBase58Data& b58) const {
+    if (vchVersion < b58.vchVersion) return -1;
+    if (vchVersion > b58.vchVersion) return  1;
+    if (vchData < b58.vchData)   return -1;
+    if (vchData > b58.vchData)   return  1;
+    return 0;
+}
+
+namespace {
+    class CBitcoinAddressVisitor : public boost::static_visitor<bool> {
+    private:
+        CBitcoinAddress *addr;
+    public:
+        CBitcoinAddressVisitor(CBitcoinAddress *addrIn) : addr(addrIn) { }
+
+        bool operator()(const CKeyID &id) const { return addr->Set(id); }
+        bool operator()(const CScriptID &id) const { return addr->Set(id); }
+        bool operator()(const CNoDestination &no) const { return false; }
+    };
+};
+
+bool CBitcoinAddress::Set(const CKeyID &id) {
+    SetData(Params().Base58Prefix(CChainParams::PUBKEY_ADDRESS), &id, 20);
+    return true;
+}
+
+bool CBitcoinAddress::Set(const CScriptID &id) {
+    SetData(Params().Base58Prefix(CChainParams::SCRIPT_ADDRESS), &id, 20);
+    return true;
+}
+
+bool CBitcoinAddress::Set(const CTxDestination &dest) {
+    return boost::apply_visitor(CBitcoinAddressVisitor(this), dest);
+}
+
+bool CBitcoinAddress::IsValid() const {
+    bool fCorrectSize = vchData.size() == 20;
+    bool fKnownVersion = vchVersion == Params().Base58Prefix(CChainParams::PUBKEY_ADDRESS) ||
+                         vchVersion == Params().Base58Prefix(CChainParams::SCRIPT_ADDRESS);
+    return fCorrectSize && fKnownVersion;
+}
+
+CTxDestination CBitcoinAddress::Get() const {
+    if (!IsValid())
+        return CNoDestination();
+    uint160 id;
+    memcpy(&id, &vchData[0], 20);
+    if (vchVersion == Params().Base58Prefix(CChainParams::PUBKEY_ADDRESS))
+        return CKeyID(id);
+    else if (vchVersion == Params().Base58Prefix(CChainParams::SCRIPT_ADDRESS))
+        return CScriptID(id);
+    else
+        return CNoDestination();
+}
+
+bool CBitcoinAddress::GetKeyID(CKeyID &keyID) const {
+    if (!IsValid() || vchVersion != Params().Base58Prefix(CChainParams::PUBKEY_ADDRESS))
+        return false;
+    uint160 id;
+    memcpy(&id, &vchData[0], 20);
+    keyID = CKeyID(id);
+    return true;
+}
+
+bool CBitcoinAddress::IsScript() const {
+    return IsValid() && vchVersion == Params().Base58Prefix(CChainParams::SCRIPT_ADDRESS);
+}
+
+void CBitcoinSecret::SetKey(const CKey& vchSecret) {
+    assert(vchSecret.IsValid());
+    SetData(Params().Base58Prefix(CChainParams::SECRET_KEY), vchSecret.begin(), vchSecret.size());
+    if (vchSecret.IsCompressed())
+        vchData.push_back(1);
+}
+
+CKey CBitcoinSecret::GetKey() {
+    CKey ret;
+    ret.Set(&vchData[0], &vchData[32], vchData.size() > 32 && vchData[32] == 1);
+    return ret;
+}
+
+bool CBitcoinSecret::IsValid() const {
+    bool fExpectedFormat = vchData.size() == 32 || (vchData.size() == 33 && vchData[32] == 1);
+    bool fCorrectVersion = vchVersion == Params().Base58Prefix(CChainParams::SECRET_KEY);
+    return fExpectedFormat && fCorrectVersion;
+}
+
+bool CBitcoinSecret::SetString(const char* pszSecret) {
+    return CBase58Data::SetString(pszSecret) && IsValid();
+}
+
+bool CBitcoinSecret::SetString(const std::string& strSecret) {
+    return SetString(strSecret.c_str());
+}