1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2014 The Bitcoin Core developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
6 #include "utilstrencodings.h"
8 #include "tinyformat.h"
17 string SanitizeString(const string& str)
20 * safeChars chosen to allow simple messages/URLs/email addresses, but avoid anything
21 * even possibly remotely dangerous like & or >
23 static string safeChars("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890 .,;_/:?@()");
25 for (std::string::size_type i = 0; i < str.size(); i++)
27 if (safeChars.find(str[i]) != std::string::npos)
28 strResult.push_back(str[i]);
33 const signed char p_util_hexdigit[256] =
34 { -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
35 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
36 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
37 0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,
38 -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
39 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
40 -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
41 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
42 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
43 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
44 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
45 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
46 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
47 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
48 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
49 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, };
51 signed char HexDigit(char c)
53 return p_util_hexdigit[(unsigned char)c];
56 bool IsHex(const string& str)
58 for(std::string::const_iterator it(str.begin()); it != str.end(); ++it)
60 if (HexDigit(*it) < 0)
63 return (str.size() > 0) && (str.size()%2 == 0);
66 vector<unsigned char> ParseHex(const char* psz)
68 // convert hex dump to vector
69 vector<unsigned char> vch;
74 signed char c = HexDigit(*psz++);
75 if (c == (signed char)-1)
77 unsigned char n = (c << 4);
79 if (c == (signed char)-1)
87 vector<unsigned char> ParseHex(const string& str)
89 return ParseHex(str.c_str());
92 string EncodeBase64(const unsigned char* pch, size_t len)
94 static const char *pbase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
97 strRet.reserve((len+2)/3*4);
100 const unsigned char *pchEnd = pch+len;
107 case 0: // we have no bits
108 strRet += pbase64[enc >> 2];
109 left = (enc & 3) << 4;
113 case 1: // we have two bits
114 strRet += pbase64[left | (enc >> 4)];
115 left = (enc & 15) << 2;
119 case 2: // we have four bits
120 strRet += pbase64[left | (enc >> 6)];
121 strRet += pbase64[enc & 63];
129 strRet += pbase64[left];
138 string EncodeBase64(const string& str)
140 return EncodeBase64((const unsigned char*)str.c_str(), str.size());
143 vector<unsigned char> DecodeBase64(const char* p, bool* pfInvalid)
145 static const int decode64_table[256] =
147 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
148 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
149 -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1,
150 -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
151 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28,
152 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
153 49, 50, 51, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
154 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
155 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
156 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
157 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
158 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
159 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
165 vector<unsigned char> vchRet;
166 vchRet.reserve(strlen(p)*3/4);
173 int dec = decode64_table[(unsigned char)*p];
174 if (dec == -1) break;
178 case 0: // we have no bits and get 6
183 case 1: // we have 6 bits and keep 4
184 vchRet.push_back((left<<2) | (dec>>4));
189 case 2: // we have 4 bits and get 6, we keep 2
190 vchRet.push_back((left<<4) | (dec>>2));
195 case 3: // we have 2 bits and get 6
196 vchRet.push_back((left<<6) | dec);
205 case 0: // 4n base64 characters processed: ok
208 case 1: // 4n+1 base64 character processed: impossible
212 case 2: // 4n+2 base64 characters processed: require '=='
213 if (left || p[0] != '=' || p[1] != '=' || decode64_table[(unsigned char)p[2]] != -1)
217 case 3: // 4n+3 base64 characters processed: require '='
218 if (left || p[0] != '=' || decode64_table[(unsigned char)p[1]] != -1)
226 string DecodeBase64(const string& str)
228 vector<unsigned char> vchRet = DecodeBase64(str.c_str());
229 return (vchRet.size() == 0) ? string() : string((const char*)&vchRet[0], vchRet.size());
232 string EncodeBase32(const unsigned char* pch, size_t len)
234 static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567";
237 strRet.reserve((len+4)/5*8);
240 const unsigned char *pchEnd = pch+len;
247 case 0: // we have no bits
248 strRet += pbase32[enc >> 3];
249 left = (enc & 7) << 2;
253 case 1: // we have three bits
254 strRet += pbase32[left | (enc >> 6)];
255 strRet += pbase32[(enc >> 1) & 31];
256 left = (enc & 1) << 4;
260 case 2: // we have one bit
261 strRet += pbase32[left | (enc >> 4)];
262 left = (enc & 15) << 1;
266 case 3: // we have four bits
267 strRet += pbase32[left | (enc >> 7)];
268 strRet += pbase32[(enc >> 2) & 31];
269 left = (enc & 3) << 3;
273 case 4: // we have two bits
274 strRet += pbase32[left | (enc >> 5)];
275 strRet += pbase32[enc & 31];
280 static const int nPadding[5] = {0, 6, 4, 3, 1};
283 strRet += pbase32[left];
284 for (int n=0; n<nPadding[mode]; n++)
291 string EncodeBase32(const string& str)
293 return EncodeBase32((const unsigned char*)str.c_str(), str.size());
296 vector<unsigned char> DecodeBase32(const char* p, bool* pfInvalid)
298 static const int decode32_table[256] =
300 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
301 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
302 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, -1, -1, -1, -1,
303 -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
304 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 0, 1, 2,
305 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
306 23, 24, 25, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
307 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
308 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
309 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
310 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
311 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
312 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
318 vector<unsigned char> vchRet;
319 vchRet.reserve((strlen(p))*5/8);
326 int dec = decode32_table[(unsigned char)*p];
327 if (dec == -1) break;
331 case 0: // we have no bits and get 5
336 case 1: // we have 5 bits and keep 2
337 vchRet.push_back((left<<3) | (dec>>2));
342 case 2: // we have 2 bits and keep 7
343 left = left << 5 | dec;
347 case 3: // we have 7 bits and keep 4
348 vchRet.push_back((left<<1) | (dec>>4));
353 case 4: // we have 4 bits, and keep 1
354 vchRet.push_back((left<<4) | (dec>>1));
359 case 5: // we have 1 bit, and keep 6
360 left = left << 5 | dec;
364 case 6: // we have 6 bits, and keep 3
365 vchRet.push_back((left<<2) | (dec>>3));
370 case 7: // we have 3 bits, and keep 0
371 vchRet.push_back((left<<5) | dec);
380 case 0: // 8n base32 characters processed: ok
383 case 1: // 8n+1 base32 characters processed: impossible
389 case 2: // 8n+2 base32 characters processed: require '======'
390 if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || p[3] != '=' || p[4] != '=' || p[5] != '=' || decode32_table[(unsigned char)p[6]] != -1)
394 case 4: // 8n+4 base32 characters processed: require '===='
395 if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || p[3] != '=' || decode32_table[(unsigned char)p[4]] != -1)
399 case 5: // 8n+5 base32 characters processed: require '==='
400 if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || decode32_table[(unsigned char)p[3]] != -1)
404 case 7: // 8n+7 base32 characters processed: require '='
405 if (left || p[0] != '=' || decode32_table[(unsigned char)p[1]] != -1)
413 string DecodeBase32(const string& str)
415 vector<unsigned char> vchRet = DecodeBase32(str.c_str());
416 return (vchRet.size() == 0) ? string() : string((const char*)&vchRet[0], vchRet.size());
419 bool ParseInt32(const std::string& str, int32_t *out)
422 errno = 0; // strtol will not set errno if valid
423 long int n = strtol(str.c_str(), &endp, 10);
424 if(out) *out = (int)n;
425 // Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow
426 // we still have to check that the returned value is within the range of an *int32_t*. On 64-bit
427 // platforms the size of these types may be different.
428 return endp && *endp == 0 && !errno &&
429 n >= std::numeric_limits<int32_t>::min() &&
430 n <= std::numeric_limits<int32_t>::max();
433 std::string FormatParagraph(const std::string in, size_t width, size_t indent)
435 std::stringstream out;
438 while(ptr < in.size())
440 // Find beginning of next word
441 ptr = in.find_first_not_of(' ', ptr);
442 if (ptr == std::string::npos)
444 // Find end of next word
445 size_t endword = in.find_first_of(' ', ptr);
446 if (endword == std::string::npos)
448 // Add newline and indentation if this wraps over the allowed width
451 if ((col + endword - ptr) > width)
454 for(size_t i=0; i<indent; ++i)
461 out << in.substr(ptr, endword - ptr);
462 col += endword - ptr + 1;
468 std::string i64tostr(int64_t n)
470 return strprintf("%d", n);
473 std::string itostr(int n)
475 return strprintf("%d", n);
478 int64_t atoi64(const char* psz)
483 return strtoll(psz, NULL, 10);
487 int64_t atoi64(const std::string& str)
490 return _atoi64(str.c_str());
492 return strtoll(str.c_str(), NULL, 10);
496 int atoi(const std::string& str)
498 return atoi(str.c_str());