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-rw-r--r--base58.h402
1 files changed, 201 insertions, 201 deletions
diff --git a/base58.h b/base58.h
index 98b808783d..4163f290d8 100644
--- a/base58.h
+++ b/base58.h
@@ -1,201 +1,201 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Distributed under the MIT/X11 software license, see the accompanying
-// file license.txt or http://www.opensource.org/licenses/mit-license.php.
-
-
-//
-// Why base-58 instead of standard base-64 encoding?
-// - Don't want 0OIl characters that look the same in some fonts and
-// could be used to create visually identical looking account numbers.
-// - A string with non-alphanumeric characters is not as easily accepted as an account number.
-// - E-mail usually won't line-break if there's no punctuation to break at.
-// - Doubleclicking selects the whole number as one word if it's all alphanumeric.
-//
-
-
-static const char* pszBase58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
-
-
-inline string EncodeBase58(const unsigned char* pbegin, const unsigned char* pend)
-{
- CAutoBN_CTX pctx;
- CBigNum bn58 = 58;
- CBigNum bn0 = 0;
-
- // Convert big endian data to little endian
- // Extra zero at the end make sure bignum will interpret as a positive number
- vector<unsigned char> vchTmp(pend-pbegin+1, 0);
- reverse_copy(pbegin, pend, vchTmp.begin());
-
- // Convert little endian data to bignum
- CBigNum bn;
- bn.setvch(vchTmp);
-
- // Convert bignum to string
- string str;
- str.reserve((pend - pbegin) * 138 / 100 + 1);
- CBigNum dv;
- CBigNum rem;
- while (bn > bn0)
- {
- if (!BN_div(&dv, &rem, &bn, &bn58, pctx))
- throw bignum_error("EncodeBase58 : BN_div failed");
- bn = dv;
- unsigned int c = rem.getulong();
- str += pszBase58[c];
- }
-
- // Leading zeroes encoded as base58 zeros
- for (const unsigned char* p = pbegin; p < pend && *p == 0; p++)
- str += pszBase58[0];
-
- // Convert little endian string to big endian
- reverse(str.begin(), str.end());
- return str;
-}
-
-inline string EncodeBase58(const vector<unsigned char>& vch)
-{
- return EncodeBase58(&vch[0], &vch[0] + vch.size());
-}
-
-inline bool DecodeBase58(const char* psz, vector<unsigned char>& vchRet)
-{
- CAutoBN_CTX pctx;
- vchRet.clear();
- CBigNum bn58 = 58;
- CBigNum bn = 0;
- CBigNum bnChar;
- while (isspace(*psz))
- psz++;
-
- // Convert big endian string to bignum
- for (const char* p = psz; *p; p++)
- {
- const char* p1 = strchr(pszBase58, *p);
- if (p1 == NULL)
- {
- while (isspace(*p))
- p++;
- if (*p != '\0')
- return false;
- break;
- }
- bnChar.setulong(p1 - pszBase58);
- if (!BN_mul(&bn, &bn, &bn58, pctx))
- throw bignum_error("DecodeBase58 : BN_mul failed");
- bn += bnChar;
- }
-
- // Get bignum as little endian data
- vector<unsigned char> vchTmp = bn.getvch();
-
- // Trim off sign byte if present
- if (vchTmp.size() >= 2 && vchTmp.end()[-1] == 0 && vchTmp.end()[-2] >= 0x80)
- vchTmp.erase(vchTmp.end()-1);
-
- // Restore leading zeros
- int nLeadingZeros = 0;
- for (const char* p = psz; *p == pszBase58[0]; p++)
- nLeadingZeros++;
- vchRet.assign(nLeadingZeros + vchTmp.size(), 0);
-
- // Convert little endian data to big endian
- reverse_copy(vchTmp.begin(), vchTmp.end(), vchRet.end() - vchTmp.size());
- return true;
-}
-
-inline bool DecodeBase58(const string& str, vector<unsigned char>& vchRet)
-{
- return DecodeBase58(str.c_str(), vchRet);
-}
-
-
-
-
-
-inline string EncodeBase58Check(const vector<unsigned char>& vchIn)
-{
- // add 4-byte hash check to the end
- 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);
-}
-
-inline bool DecodeBase58Check(const char* psz, vector<unsigned char>& vchRet)
-{
- if (!DecodeBase58(psz, vchRet))
- return false;
- if (vchRet.size() < 4)
- {
- vchRet.clear();
- return false;
- }
- 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;
-}
-
-inline bool DecodeBase58Check(const string& str, vector<unsigned char>& vchRet)
-{
- return DecodeBase58Check(str.c_str(), vchRet);
-}
-
-
-
-
-
-
-static const unsigned char ADDRESSVERSION = 0;
-
-inline string Hash160ToAddress(uint160 hash160)
-{
- // add 1-byte version number to the front
- vector<unsigned char> vch(1, ADDRESSVERSION);
- vch.insert(vch.end(), UBEGIN(hash160), UEND(hash160));
- return EncodeBase58Check(vch);
-}
-
-inline bool AddressToHash160(const char* psz, uint160& hash160Ret)
-{
- 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);
-}
-
-inline bool AddressToHash160(const string& str, uint160& hash160Ret)
-{
- return AddressToHash160(str.c_str(), hash160Ret);
-}
-
-inline bool IsValidBitcoinAddress(const char* psz)
-{
- uint160 hash160;
- return AddressToHash160(psz, hash160);
-}
-
-inline bool IsValidBitcoinAddress(const string& str)
-{
- return IsValidBitcoinAddress(str.c_str());
-}
-
-
-
-
-inline string PubKeyToAddress(const vector<unsigned char>& vchPubKey)
-{
- return Hash160ToAddress(Hash160(vchPubKey));
-}
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+
+
+//
+// Why base-58 instead of standard base-64 encoding?
+// - Don't want 0OIl characters that look the same in some fonts and
+// could be used to create visually identical looking account numbers.
+// - A string with non-alphanumeric characters is not as easily accepted as an account number.
+// - E-mail usually won't line-break if there's no punctuation to break at.
+// - Doubleclicking selects the whole number as one word if it's all alphanumeric.
+//
+
+
+static const char* pszBase58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
+
+
+inline string EncodeBase58(const unsigned char* pbegin, const unsigned char* pend)
+{
+ CAutoBN_CTX pctx;
+ CBigNum bn58 = 58;
+ CBigNum bn0 = 0;
+
+ // Convert big endian data to little endian
+ // Extra zero at the end make sure bignum will interpret as a positive number
+ vector<unsigned char> vchTmp(pend-pbegin+1, 0);
+ reverse_copy(pbegin, pend, vchTmp.begin());
+
+ // Convert little endian data to bignum
+ CBigNum bn;
+ bn.setvch(vchTmp);
+
+ // Convert bignum to string
+ string str;
+ str.reserve((pend - pbegin) * 138 / 100 + 1);
+ CBigNum dv;
+ CBigNum rem;
+ while (bn > bn0)
+ {
+ if (!BN_div(&dv, &rem, &bn, &bn58, pctx))
+ throw bignum_error("EncodeBase58 : BN_div failed");
+ bn = dv;
+ unsigned int c = rem.getulong();
+ str += pszBase58[c];
+ }
+
+ // Leading zeroes encoded as base58 zeros
+ for (const unsigned char* p = pbegin; p < pend && *p == 0; p++)
+ str += pszBase58[0];
+
+ // Convert little endian string to big endian
+ reverse(str.begin(), str.end());
+ return str;
+}
+
+inline string EncodeBase58(const vector<unsigned char>& vch)
+{
+ return EncodeBase58(&vch[0], &vch[0] + vch.size());
+}
+
+inline bool DecodeBase58(const char* psz, vector<unsigned char>& vchRet)
+{
+ CAutoBN_CTX pctx;
+ vchRet.clear();
+ CBigNum bn58 = 58;
+ CBigNum bn = 0;
+ CBigNum bnChar;
+ while (isspace(*psz))
+ psz++;
+
+ // Convert big endian string to bignum
+ for (const char* p = psz; *p; p++)
+ {
+ const char* p1 = strchr(pszBase58, *p);
+ if (p1 == NULL)
+ {
+ while (isspace(*p))
+ p++;
+ if (*p != '\0')
+ return false;
+ break;
+ }
+ bnChar.setulong(p1 - pszBase58);
+ if (!BN_mul(&bn, &bn, &bn58, pctx))
+ throw bignum_error("DecodeBase58 : BN_mul failed");
+ bn += bnChar;
+ }
+
+ // Get bignum as little endian data
+ vector<unsigned char> vchTmp = bn.getvch();
+
+ // Trim off sign byte if present
+ if (vchTmp.size() >= 2 && vchTmp.end()[-1] == 0 && vchTmp.end()[-2] >= 0x80)
+ vchTmp.erase(vchTmp.end()-1);
+
+ // Restore leading zeros
+ int nLeadingZeros = 0;
+ for (const char* p = psz; *p == pszBase58[0]; p++)
+ nLeadingZeros++;
+ vchRet.assign(nLeadingZeros + vchTmp.size(), 0);
+
+ // Convert little endian data to big endian
+ reverse_copy(vchTmp.begin(), vchTmp.end(), vchRet.end() - vchTmp.size());
+ return true;
+}
+
+inline bool DecodeBase58(const string& str, vector<unsigned char>& vchRet)
+{
+ return DecodeBase58(str.c_str(), vchRet);
+}
+
+
+
+
+
+inline string EncodeBase58Check(const vector<unsigned char>& vchIn)
+{
+ // add 4-byte hash check to the end
+ 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);
+}
+
+inline bool DecodeBase58Check(const char* psz, vector<unsigned char>& vchRet)
+{
+ if (!DecodeBase58(psz, vchRet))
+ return false;
+ if (vchRet.size() < 4)
+ {
+ vchRet.clear();
+ return false;
+ }
+ 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;
+}
+
+inline bool DecodeBase58Check(const string& str, vector<unsigned char>& vchRet)
+{
+ return DecodeBase58Check(str.c_str(), vchRet);
+}
+
+
+
+
+
+
+static const unsigned char ADDRESSVERSION = 0;
+
+inline string Hash160ToAddress(uint160 hash160)
+{
+ // add 1-byte version number to the front
+ vector<unsigned char> vch(1, ADDRESSVERSION);
+ vch.insert(vch.end(), UBEGIN(hash160), UEND(hash160));
+ return EncodeBase58Check(vch);
+}
+
+inline bool AddressToHash160(const char* psz, uint160& hash160Ret)
+{
+ 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);
+}
+
+inline bool AddressToHash160(const string& str, uint160& hash160Ret)
+{
+ return AddressToHash160(str.c_str(), hash160Ret);
+}
+
+inline bool IsValidBitcoinAddress(const char* psz)
+{
+ uint160 hash160;
+ return AddressToHash160(psz, hash160);
+}
+
+inline bool IsValidBitcoinAddress(const string& str)
+{
+ return IsValidBitcoinAddress(str.c_str());
+}
+
+
+
+
+inline string PubKeyToAddress(const vector<unsigned char>& vchPubKey)
+{
+ return Hash160ToAddress(Hash160(vchPubKey));
+}
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