93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2018 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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/**
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* Why base-58 instead of standard base-64 encoding?
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* - Don't want 0OIl characters that look the same in some fonts and
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* could be used to create visually identical looking data.
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* - A string with non-alphanumeric characters is not as easily accepted as input.
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* - E-mail usually won't line-break if there's no punctuation to break at.
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* - Double-clicking selects the whole string as one word if it's all alphanumeric.
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*/
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#ifndef BITCOIN_BASE58_H
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#define BITCOIN_BASE58_H
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#include <string>
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#include <vector>
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#include <support/allocators/zeroafterfree.h>
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/**
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* Encode a byte sequence as a base58-encoded string.
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* pbegin and pend cannot be nullptr, unless both are.
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*/
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std::string EncodeBase58(const unsigned char* pbegin, const unsigned char* pend);
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/**
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* Encode a byte vector as a base58-encoded string
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*/
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std::string EncodeBase58(const std::vector<unsigned char>& vch);
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/**
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* Decode a base58-encoded string (psz) into a byte vector (vchRet).
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* return true if decoding is successful.
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* psz cannot be nullptr.
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*/
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bool DecodeBase58(const char* psz, std::vector<unsigned char>& vchRet);
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/**
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* Decode a base58-encoded string (str) into a byte vector (vchRet).
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* return true if decoding is successful.
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*/
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bool DecodeBase58(const std::string& str, std::vector<unsigned char>& vchRet);
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/**
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* Encode a byte vector into a base58-encoded string, including checksum
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*/
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std::string EncodeBase58Check(const std::vector<unsigned char>& vchIn);
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/**
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* Decode a base58-encoded string (psz) that includes a checksum into a byte
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* vector (vchRet), return true if decoding is successful
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*/
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bool DecodeBase58Check(const char* psz, std::vector<unsigned char>& vchRet);
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/**
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* Decode a base58-encoded string (str) that includes a checksum into a byte
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* vector (vchRet), return true if decoding is successful
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*/
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bool DecodeBase58Check(const std::string& str, std::vector<unsigned char>& vchRet);
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/**
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* Base class for all base58-encoded data
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*/
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class CBase58Data
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{
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protected:
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//! the version byte(s)
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std::vector<unsigned char> vchVersion;
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//! the actually encoded data
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typedef std::vector<unsigned char, zero_after_free_allocator<unsigned char> > vector_uchar;
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vector_uchar vchData;
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CBase58Data();
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void SetData(const std::vector<unsigned char> &vchVersionIn, const void* pdata, size_t nSize);
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void SetData(const std::vector<unsigned char> &vchVersionIn, const unsigned char *pbegin, const unsigned char *pend);
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public:
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bool SetString(const char* psz, unsigned int nVersionBytes);
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bool SetString(const std::string& str, unsigned int nVersionBytes);
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std::string ToString() const;
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int CompareTo(const CBase58Data& b58) const;
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bool operator==(const CBase58Data& b58) const { return CompareTo(b58) == 0; }
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bool operator<=(const CBase58Data& b58) const { return CompareTo(b58) <= 0; }
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bool operator>=(const CBase58Data& b58) const { return CompareTo(b58) >= 0; }
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bool operator< (const CBase58Data& b58) const { return CompareTo(b58) < 0; }
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bool operator> (const CBase58Data& b58) const { return CompareTo(b58) > 0; }
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};
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#endif // BITCOIN_BASE58_H
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