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499 lines
15 KiB
499 lines
15 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto |
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// Copyright (c) 2009-2014 The Bitcoin 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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#include "utilstrencodings.h" |
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#include "tinyformat.h" |
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#include <cstdlib> |
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#include <cstring> |
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#include <errno.h> |
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#include <limits> |
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using namespace std; |
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/** |
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* safeChars chosen to allow simple messages/URLs/email addresses, but avoid anything |
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* even possibly remotely dangerous like & or > |
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*/ |
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static string safeChars("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890 .,;_/:?@()"); |
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string SanitizeString(const string& str) |
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{ |
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string strResult; |
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for (std::string::size_type i = 0; i < str.size(); i++) |
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{ |
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if (safeChars.find(str[i]) != std::string::npos) |
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strResult.push_back(str[i]); |
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} |
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return strResult; |
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} |
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const signed char p_util_hexdigit[256] = |
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{ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1, |
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-1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, |
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-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, }; |
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signed char HexDigit(char c) |
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{ |
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return p_util_hexdigit[(unsigned char)c]; |
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} |
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bool IsHex(const string& str) |
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{ |
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for(std::string::const_iterator it(str.begin()); it != str.end(); ++it) |
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{ |
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if (HexDigit(*it) < 0) |
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return false; |
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} |
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return (str.size() > 0) && (str.size()%2 == 0); |
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} |
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vector<unsigned char> ParseHex(const char* psz) |
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{ |
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// convert hex dump to vector |
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vector<unsigned char> vch; |
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while (true) |
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{ |
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while (isspace(*psz)) |
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psz++; |
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signed char c = HexDigit(*psz++); |
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if (c == (signed char)-1) |
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break; |
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unsigned char n = (c << 4); |
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c = HexDigit(*psz++); |
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if (c == (signed char)-1) |
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break; |
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n |= c; |
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vch.push_back(n); |
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} |
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return vch; |
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} |
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vector<unsigned char> ParseHex(const string& str) |
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{ |
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return ParseHex(str.c_str()); |
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} |
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string EncodeBase64(const unsigned char* pch, size_t len) |
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{ |
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static const char *pbase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
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string strRet=""; |
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strRet.reserve((len+2)/3*4); |
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int mode=0, left=0; |
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const unsigned char *pchEnd = pch+len; |
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while (pch<pchEnd) |
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{ |
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int enc = *(pch++); |
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switch (mode) |
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{ |
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case 0: // we have no bits |
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strRet += pbase64[enc >> 2]; |
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left = (enc & 3) << 4; |
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mode = 1; |
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break; |
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case 1: // we have two bits |
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strRet += pbase64[left | (enc >> 4)]; |
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left = (enc & 15) << 2; |
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mode = 2; |
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break; |
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case 2: // we have four bits |
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strRet += pbase64[left | (enc >> 6)]; |
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strRet += pbase64[enc & 63]; |
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mode = 0; |
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break; |
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} |
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} |
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if (mode) |
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{ |
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strRet += pbase64[left]; |
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strRet += '='; |
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if (mode == 1) |
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strRet += '='; |
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} |
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return strRet; |
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} |
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string EncodeBase64(const string& str) |
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{ |
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return EncodeBase64((const unsigned char*)str.c_str(), str.size()); |
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} |
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vector<unsigned char> DecodeBase64(const char* p, bool* pfInvalid) |
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{ |
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static const int decode64_table[256] = |
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{ |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, |
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-1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, |
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29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, |
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49, 50, 51, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 |
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}; |
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if (pfInvalid) |
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*pfInvalid = false; |
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vector<unsigned char> vchRet; |
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vchRet.reserve(strlen(p)*3/4); |
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int mode = 0; |
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int left = 0; |
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while (1) |
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{ |
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int dec = decode64_table[(unsigned char)*p]; |
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if (dec == -1) break; |
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p++; |
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switch (mode) |
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{ |
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case 0: // we have no bits and get 6 |
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left = dec; |
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mode = 1; |
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break; |
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case 1: // we have 6 bits and keep 4 |
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vchRet.push_back((left<<2) | (dec>>4)); |
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left = dec & 15; |
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mode = 2; |
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break; |
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case 2: // we have 4 bits and get 6, we keep 2 |
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vchRet.push_back((left<<4) | (dec>>2)); |
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left = dec & 3; |
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mode = 3; |
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break; |
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case 3: // we have 2 bits and get 6 |
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vchRet.push_back((left<<6) | dec); |
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mode = 0; |
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break; |
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} |
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} |
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if (pfInvalid) |
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switch (mode) |
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{ |
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case 0: // 4n base64 characters processed: ok |
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break; |
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case 1: // 4n+1 base64 character processed: impossible |
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*pfInvalid = true; |
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break; |
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case 2: // 4n+2 base64 characters processed: require '==' |
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if (left || p[0] != '=' || p[1] != '=' || decode64_table[(unsigned char)p[2]] != -1) |
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*pfInvalid = true; |
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break; |
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case 3: // 4n+3 base64 characters processed: require '=' |
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if (left || p[0] != '=' || decode64_table[(unsigned char)p[1]] != -1) |
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*pfInvalid = true; |
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break; |
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} |
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return vchRet; |
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} |
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string DecodeBase64(const string& str) |
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{ |
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vector<unsigned char> vchRet = DecodeBase64(str.c_str()); |
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return (vchRet.size() == 0) ? string() : string((const char*)&vchRet[0], vchRet.size()); |
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} |
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string EncodeBase32(const unsigned char* pch, size_t len) |
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{ |
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static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567"; |
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string strRet=""; |
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strRet.reserve((len+4)/5*8); |
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int mode=0, left=0; |
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const unsigned char *pchEnd = pch+len; |
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while (pch<pchEnd) |
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{ |
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int enc = *(pch++); |
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switch (mode) |
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{ |
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case 0: // we have no bits |
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strRet += pbase32[enc >> 3]; |
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left = (enc & 7) << 2; |
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mode = 1; |
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break; |
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case 1: // we have three bits |
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strRet += pbase32[left | (enc >> 6)]; |
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strRet += pbase32[(enc >> 1) & 31]; |
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left = (enc & 1) << 4; |
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mode = 2; |
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break; |
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case 2: // we have one bit |
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strRet += pbase32[left | (enc >> 4)]; |
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left = (enc & 15) << 1; |
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mode = 3; |
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break; |
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case 3: // we have four bits |
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strRet += pbase32[left | (enc >> 7)]; |
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strRet += pbase32[(enc >> 2) & 31]; |
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left = (enc & 3) << 3; |
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mode = 4; |
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break; |
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case 4: // we have two bits |
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strRet += pbase32[left | (enc >> 5)]; |
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strRet += pbase32[enc & 31]; |
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mode = 0; |
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} |
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} |
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static const int nPadding[5] = {0, 6, 4, 3, 1}; |
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if (mode) |
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{ |
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strRet += pbase32[left]; |
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for (int n=0; n<nPadding[mode]; n++) |
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strRet += '='; |
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} |
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return strRet; |
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} |
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string EncodeBase32(const string& str) |
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{ |
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return EncodeBase32((const unsigned char*)str.c_str(), str.size()); |
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} |
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vector<unsigned char> DecodeBase32(const char* p, bool* pfInvalid) |
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{ |
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static const int decode32_table[256] = |
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{ |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 0, 1, 2, |
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3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, |
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23, 24, 25, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 |
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}; |
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if (pfInvalid) |
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*pfInvalid = false; |
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vector<unsigned char> vchRet; |
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vchRet.reserve((strlen(p))*5/8); |
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int mode = 0; |
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int left = 0; |
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while (1) |
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{ |
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int dec = decode32_table[(unsigned char)*p]; |
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if (dec == -1) break; |
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p++; |
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switch (mode) |
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{ |
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case 0: // we have no bits and get 5 |
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left = dec; |
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mode = 1; |
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break; |
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case 1: // we have 5 bits and keep 2 |
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vchRet.push_back((left<<3) | (dec>>2)); |
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left = dec & 3; |
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mode = 2; |
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break; |
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case 2: // we have 2 bits and keep 7 |
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left = left << 5 | dec; |
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mode = 3; |
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break; |
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case 3: // we have 7 bits and keep 4 |
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vchRet.push_back((left<<1) | (dec>>4)); |
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left = dec & 15; |
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mode = 4; |
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break; |
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case 4: // we have 4 bits, and keep 1 |
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vchRet.push_back((left<<4) | (dec>>1)); |
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left = dec & 1; |
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mode = 5; |
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break; |
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case 5: // we have 1 bit, and keep 6 |
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left = left << 5 | dec; |
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mode = 6; |
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break; |
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case 6: // we have 6 bits, and keep 3 |
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vchRet.push_back((left<<2) | (dec>>3)); |
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left = dec & 7; |
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mode = 7; |
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break; |
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case 7: // we have 3 bits, and keep 0 |
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vchRet.push_back((left<<5) | dec); |
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mode = 0; |
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break; |
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} |
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} |
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if (pfInvalid) |
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switch (mode) |
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{ |
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case 0: // 8n base32 characters processed: ok |
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break; |
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case 1: // 8n+1 base32 characters processed: impossible |
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case 3: // +3 |
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case 6: // +6 |
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*pfInvalid = true; |
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break; |
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case 2: // 8n+2 base32 characters processed: require '======' |
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if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || p[3] != '=' || p[4] != '=' || p[5] != '=' || decode32_table[(unsigned char)p[6]] != -1) |
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*pfInvalid = true; |
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break; |
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case 4: // 8n+4 base32 characters processed: require '====' |
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if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || p[3] != '=' || decode32_table[(unsigned char)p[4]] != -1) |
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*pfInvalid = true; |
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break; |
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case 5: // 8n+5 base32 characters processed: require '===' |
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if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || decode32_table[(unsigned char)p[3]] != -1) |
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*pfInvalid = true; |
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break; |
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case 7: // 8n+7 base32 characters processed: require '=' |
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if (left || p[0] != '=' || decode32_table[(unsigned char)p[1]] != -1) |
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*pfInvalid = true; |
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break; |
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} |
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return vchRet; |
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} |
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string DecodeBase32(const string& str) |
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{ |
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vector<unsigned char> vchRet = DecodeBase32(str.c_str()); |
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return (vchRet.size() == 0) ? string() : string((const char*)&vchRet[0], vchRet.size()); |
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} |
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bool ParseInt32(const std::string& str, int32_t *out) |
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{ |
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char *endp = NULL; |
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errno = 0; // strtol will not set errno if valid |
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long int n = strtol(str.c_str(), &endp, 10); |
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if(out) *out = (int)n; |
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// Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow |
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// we still have to check that the returned value is within the range of an *int32_t*. On 64-bit |
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// platforms the size of these types may be different. |
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return endp && *endp == 0 && !errno && |
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n >= std::numeric_limits<int32_t>::min() && |
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n <= std::numeric_limits<int32_t>::max(); |
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} |
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std::string FormatParagraph(const std::string in, size_t width, size_t indent) |
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{ |
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std::stringstream out; |
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size_t col = 0; |
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size_t ptr = 0; |
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while(ptr < in.size()) |
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{ |
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// Find beginning of next word |
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ptr = in.find_first_not_of(' ', ptr); |
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if (ptr == std::string::npos) |
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break; |
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// Find end of next word |
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size_t endword = in.find_first_of(' ', ptr); |
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if (endword == std::string::npos) |
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endword = in.size(); |
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// Add newline and indentation if this wraps over the allowed width |
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if (col > 0) |
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{ |
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if ((col + endword - ptr) > width) |
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{ |
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out << '\n'; |
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for(size_t i=0; i<indent; ++i) |
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out << ' '; |
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col = 0; |
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} else |
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out << ' '; |
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} |
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// Append word |
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out << in.substr(ptr, endword - ptr); |
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col += endword - ptr; |
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ptr = endword; |
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} |
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return out.str(); |
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} |
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std::string i64tostr(int64_t n) |
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{ |
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return strprintf("%d", n); |
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} |
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std::string itostr(int n) |
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{ |
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return strprintf("%d", n); |
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} |
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int64_t atoi64(const char* psz) |
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{ |
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#ifdef _MSC_VER |
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return _atoi64(psz); |
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#else |
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return strtoll(psz, NULL, 10); |
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#endif |
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} |
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int64_t atoi64(const std::string& str) |
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{ |
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#ifdef _MSC_VER |
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return _atoi64(str.c_str()); |
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#else |
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return strtoll(str.c_str(), NULL, 10); |
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#endif |
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} |
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int atoi(const std::string& str) |
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{ |
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return atoi(str.c_str()); |
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}
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