2 This file is part of GNUnet.
3 Copyright (C) 2005-2017 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
16 * @file util/strings.c
17 * @brief string functions
19 * @author Christian Grothoff
26 #include "gnunet_crypto_lib.h"
27 #include "gnunet_strings_lib.h"
32 #define LOG(kind,...) GNUNET_log_from (kind, "util-strings", __VA_ARGS__)
34 #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-strings", syscall)
38 * Fill a buffer of the given size with
39 * count 0-terminated strings (given as varargs).
40 * If "buffer" is NULL, only compute the amount of
41 * space required (sum of "strlen(arg)+1").
43 * Unlike using "snprintf" with "%s", this function
44 * will add 0-terminators after each string. The
45 * #GNUNET_string_buffer_tokenize() function can be
46 * used to parse the buffer back into individual
49 * @param buffer the buffer to fill with strings, can
50 * be NULL in which case only the necessary
51 * amount of space will be calculated
52 * @param size number of bytes available in buffer
53 * @param count number of strings that follow
54 * @param ... count 0-terminated strings to copy to buffer
55 * @return number of bytes written to the buffer
56 * (or number of bytes that would have been written)
59 GNUNET_STRINGS_buffer_fill (char *buffer, size_t size, unsigned int count, ...)
70 s = va_arg (ap, const char *);
72 slen = strlen (s) + 1;
75 GNUNET_assert (needed + slen <= size);
76 GNUNET_memcpy (&buffer[needed], s, slen);
87 * Convert a peer path to a human-readable string.
89 * @param pids array of PIDs to convert to a string
90 * @param num_pids length of the @a pids array
91 * @return string representing the array of @a pids
94 GNUNET_STRINGS_pp2s (const struct GNUNET_PeerIdentity *pids,
95 unsigned int num_pids)
99 size_t plen = num_pids * 5 + 1;
102 buf = GNUNET_malloc (plen);
103 for (unsigned int i = 0;
107 off += GNUNET_snprintf (&buf[off],
110 GNUNET_i2s (&pids[i]),
111 (i == num_pids -1) ? "" : "-");
118 * Given a buffer of a given size, find "count"
119 * 0-terminated strings in the buffer and assign
120 * the count (varargs) of type "const char**" to the
121 * locations of the respective strings in the
124 * @param buffer the buffer to parse
125 * @param size size of the buffer
126 * @param count number of strings to locate
127 * @return offset of the character after the last 0-termination
128 * in the buffer, or 0 on error.
131 GNUNET_STRINGS_buffer_tokenize (const char *buffer, size_t size,
132 unsigned int count, ...)
140 va_start (ap, count);
143 r = va_arg (ap, const char **);
146 while ((needed < size) && (buffer[needed] != '\0'))
151 return 0; /* error */
154 needed++; /* skip 0-termination */
163 * Convert a given filesize into a fancy human-readable format.
165 * @param size number of bytes
166 * @return fancy representation of the size (possibly rounded) for humans
169 GNUNET_STRINGS_byte_size_fancy (unsigned long long size)
171 const char *unit = _( /* size unit */ "b");
194 ret = GNUNET_malloc (32);
195 GNUNET_snprintf (ret, 32, "%llu %s", size, unit);
201 * Unit conversion table entry for 'convert_with_table'.
203 struct ConversionTable
206 * Name of the unit (or NULL for end of table).
211 * Factor to apply for this unit.
213 unsigned long long value;
218 * Convert a string of the form "4 X 5 Y" into a numeric value
219 * by interpreting "X" and "Y" as units and then multiplying
220 * the numbers with the values associated with the respective
221 * unit from the conversion table.
223 * @param input input string to parse
224 * @param table table with the conversion of unit names to numbers
225 * @param output where to store the result
226 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
229 convert_with_table (const char *input,
230 const struct ConversionTable *table,
231 unsigned long long *output)
233 unsigned long long ret;
236 unsigned long long last;
241 in = GNUNET_strdup (input);
242 for (tok = strtok (in, " "); tok != NULL; tok = strtok (NULL, " "))
247 while ((table[i].name != NULL) && (0 != strcasecmp (table[i].name, tok)))
249 if (table[i].name != NULL)
251 last *= table[i].value;
252 break; /* next tok */
259 last = strtoull (tok, &endptr, 10);
260 if ((0 != errno) || (endptr == tok))
263 return GNUNET_SYSERR; /* expected number */
265 if ('\0' == endptr[0])
266 break; /* next tok */
268 tok = endptr; /* and re-check (handles times like "10s") */
270 } while (GNUNET_YES);
280 * Convert a given fancy human-readable size to bytes.
282 * @param fancy_size human readable string (i.e. 1 MB)
283 * @param size set to the size in bytes
284 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
287 GNUNET_STRINGS_fancy_size_to_bytes (const char *fancy_size,
288 unsigned long long *size)
290 static const struct ConversionTable table[] =
295 { "MiB", 1024 * 1024},
296 { "MB", 1000 * 1000},
297 { "GiB", 1024 * 1024 * 1024},
298 { "GB", 1000 * 1000 * 1000},
299 { "TiB", 1024LL * 1024LL * 1024LL * 1024LL},
300 { "TB", 1000LL * 1000LL * 1000LL * 1024LL},
301 { "PiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
302 { "PB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL},
303 { "EiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
304 { "EB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL * 1000LL},
308 return convert_with_table (fancy_size,
315 * Convert a given fancy human-readable time to our internal
318 * @param fancy_time human readable string (i.e. 1 minute)
319 * @param rtime set to the relative time
320 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
323 GNUNET_STRINGS_fancy_time_to_relative (const char *fancy_time,
324 struct GNUNET_TIME_Relative *rtime)
326 static const struct ConversionTable table[] =
330 { "s", 1000 * 1000LL },
331 { "\"", 1000 * 1000LL },
332 { "m", 60 * 1000 * 1000LL},
333 { "min", 60 * 1000 * 1000LL},
334 { "minute", 60 * 1000 * 1000LL},
335 { "minutes", 60 * 1000 * 1000LL},
336 { "'", 60 * 1000 * 1000LL},
337 { "h", 60 * 60 * 1000 * 1000LL},
338 { "hour", 60 * 60 * 1000 * 1000LL},
339 { "hours", 60 * 60 * 1000 * 1000LL},
340 { "d", 24 * 60 * 60 * 1000LL * 1000LL},
341 { "day", 24 * 60 * 60 * 1000LL * 1000LL},
342 { "days", 24 * 60 * 60 * 1000LL * 1000LL},
343 { "week", 7 * 24 * 60 * 60 * 1000LL * 1000LL},
344 { "weeks", 7 * 24 * 60 * 60 * 1000LL * 1000LL},
345 { "year", 31536000000000LL /* year */ },
346 { "years", 31536000000000LL /* year */ },
347 { "a", 31536000000000LL /* year */ },
351 unsigned long long val;
353 if (0 == strcasecmp ("forever", fancy_time))
355 *rtime = GNUNET_TIME_UNIT_FOREVER_REL;
358 ret = convert_with_table (fancy_time,
361 rtime->rel_value_us = (uint64_t) val;
367 * Convert a given fancy human-readable time to our internal
368 * representation. The human-readable time is expected to be
369 * in local time, whereas the returned value will be in UTC.
371 * @param fancy_time human readable string (i.e. %Y-%m-%d %H:%M:%S)
372 * @param atime set to the absolute time
373 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
376 GNUNET_STRINGS_fancy_time_to_absolute (const char *fancy_time,
377 struct GNUNET_TIME_Absolute *atime)
382 if (0 == strcasecmp ("end of time",
385 *atime = GNUNET_TIME_UNIT_FOREVER_ABS;
388 memset (&tv, 0, sizeof (tv));
389 if ( (NULL == strptime (fancy_time, "%a %b %d %H:%M:%S %Y", &tv)) &&
390 (NULL == strptime (fancy_time, "%c", &tv)) &&
391 (NULL == strptime (fancy_time, "%Ec", &tv)) &&
392 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M:%S", &tv)) &&
393 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M", &tv)) &&
394 (NULL == strptime (fancy_time, "%x", &tv)) &&
395 (NULL == strptime (fancy_time, "%Ex", &tv)) &&
396 (NULL == strptime (fancy_time, "%Y-%m-%d", &tv)) &&
397 (NULL == strptime (fancy_time, "%Y-%m", &tv)) &&
398 (NULL == strptime (fancy_time, "%Y", &tv)) )
399 return GNUNET_SYSERR;
401 atime->abs_value_us = (uint64_t) ((uint64_t) t * 1000LL * 1000LL);
407 * Convert the len characters long character sequence
408 * given in input that is in the given input charset
409 * to a string in given output charset.
411 * @param input input string
412 * @param len number of bytes in @a input
413 * @param input_charset character set used for @a input
414 * @param output_charset desired character set for the return value
415 * @return the converted string (0-terminated),
416 * if conversion fails, a copy of the orignal
417 * string is returned.
420 GNUNET_STRINGS_conv (const char *input,
422 const char *input_charset,
423 const char *output_charset)
427 char *encoded_string;
428 size_t u8_string_length;
429 size_t encoded_string_length;
431 u8_string = u8_conv_from_encoding (input_charset,
436 if (NULL == u8_string)
438 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_from_encoding");
441 if (0 == strcmp (output_charset, "UTF-8"))
443 ret = GNUNET_malloc (u8_string_length + 1);
444 GNUNET_memcpy (ret, u8_string, u8_string_length);
445 ret[u8_string_length] = '\0';
449 encoded_string = u8_conv_to_encoding (output_charset, iconveh_error,
450 u8_string, u8_string_length,
452 &encoded_string_length);
454 if (NULL == encoded_string)
456 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_to_encoding");
459 ret = GNUNET_malloc (encoded_string_length + 1);
460 GNUNET_memcpy (ret, encoded_string, encoded_string_length);
461 ret[encoded_string_length] = '\0';
462 free (encoded_string);
465 LOG (GNUNET_ERROR_TYPE_WARNING,
466 _("Character sets requested were `%s'->`%s'\n"),
467 "UTF-8", output_charset);
468 ret = GNUNET_malloc (len + 1);
469 GNUNET_memcpy (ret, input, len);
476 * Convert the len characters long character sequence
477 * given in input that is in the given charset
480 * @param input the input string (not necessarily 0-terminated)
481 * @param len the number of bytes in the @a input
482 * @param charset character set to convert from
483 * @return the converted string (0-terminated),
484 * if conversion fails, a copy of the orignal
485 * string is returned.
488 GNUNET_STRINGS_to_utf8 (const char *input,
492 return GNUNET_STRINGS_conv (input, len, charset, "UTF-8");
497 * Convert the len bytes-long UTF-8 string
498 * given in input to the given charset.
500 * @param input the input string (not necessarily 0-terminated)
501 * @param len the number of bytes in the @a input
502 * @param charset character set to convert to
503 * @return the converted string (0-terminated),
504 * if conversion fails, a copy of the orignal
505 * string is returned.
508 GNUNET_STRINGS_from_utf8 (const char *input,
512 return GNUNET_STRINGS_conv (input, len, "UTF-8", charset);
517 * Convert the utf-8 input string to lowercase.
518 * Output needs to be allocated appropriately.
520 * @param input input string
521 * @param output output buffer
524 GNUNET_STRINGS_utf8_tolower (const char *input,
530 tmp_in = u8_tolower ((uint8_t*)input, strlen ((char *) input),
531 NULL, UNINORM_NFD, NULL, &len);
532 GNUNET_memcpy(output, tmp_in, len);
539 * Convert the utf-8 input string to uppercase.
540 * Output needs to be allocated appropriately.
542 * @param input input string
543 * @param output output buffer
546 GNUNET_STRINGS_utf8_toupper(const char *input,
552 tmp_in = u8_toupper ((uint8_t*)input, strlen ((char *) input),
553 NULL, UNINORM_NFD, NULL, &len);
554 GNUNET_memcpy (output, tmp_in, len);
561 * Complete filename (a la shell) from abbrevition.
562 * @param fil the name of the file, may contain ~/ or
563 * be relative to the current directory
564 * @returns the full file name,
565 * NULL is returned on error
568 GNUNET_STRINGS_filename_expand (const char *fil)
584 if (fil[0] == DIR_SEPARATOR)
585 /* absolute path, just copy */
586 return GNUNET_strdup (fil);
589 fm = getenv ("HOME");
592 LOG (GNUNET_ERROR_TYPE_WARNING,
593 _("Failed to expand `$HOME': environment variable `HOME' not set"));
596 fm = GNUNET_strdup (fm);
597 /* do not copy '~' */
600 /* skip over dir seperator to be consistent */
601 if (fil_ptr[0] == DIR_SEPARATOR)
612 buffer = GNUNET_malloc (len);
613 if (getcwd (buffer, len) != NULL)
618 if ((errno == ERANGE) && (len < 1024 * 1024 * 4))
621 GNUNET_free (buffer);
624 GNUNET_free (buffer);
629 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
631 buffer = getenv ("PWD"); /* alternative */
633 fm = GNUNET_strdup (buffer);
636 fm = GNUNET_strdup ("./"); /* give up */
638 GNUNET_asprintf (&buffer,
641 (fm[strlen (fm) - 1] ==
642 DIR_SEPARATOR) ? "" : DIR_SEPARATOR_STR, fil_ptr);
646 fn = GNUNET_malloc (MAX_PATH + 1);
648 if ((lRet = plibc_conv_to_win_path (fil, fn)) != ERROR_SUCCESS)
650 SetErrnoFromWinError (lRet);
651 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
652 "plibc_conv_to_win_path");
655 /* is the path relative? */
656 if ( (0 != strncmp (fn + 1, ":\\", 2)) &&
657 (0 != strncmp (fn, "\\\\", 2)) )
659 char szCurDir[MAX_PATH + 1];
661 lRet = GetCurrentDirectory (MAX_PATH + 1,
663 if (lRet + strlen (fn) + 1 > (MAX_PATH + 1))
665 SetErrnoFromWinError (ERROR_BUFFER_OVERFLOW);
666 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING,
667 "GetCurrentDirectory");
670 GNUNET_asprintf (&buffer,
684 * Give relative time in human-readable fancy format.
685 * This is one of the very few calls in the entire API that is
688 * @param delta time in milli seconds
689 * @param do_round are we allowed to round a bit?
690 * @return time as human-readable string
693 GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative delta,
696 static char buf[128];
697 const char *unit = _( /* time unit */ "µs");
698 uint64_t dval = delta.rel_value_us;
700 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == delta.rel_value_us)
702 if (0 == delta.rel_value_us)
704 if ( ( (GNUNET_YES == do_round) &&
705 (dval > 5 * 1000) ) ||
706 (0 == (dval % 1000) ))
709 unit = _( /* time unit */ "ms");
710 if ( ( (GNUNET_YES == do_round) &&
711 (dval > 5 * 1000) ) ||
712 (0 == (dval % 1000) ))
715 unit = _( /* time unit */ "s");
716 if ( ( (GNUNET_YES == do_round) &&
718 (0 == (dval % 60) ) )
721 unit = _( /* time unit */ "m");
722 if ( ( (GNUNET_YES == do_round) &&
727 unit = _( /* time unit */ "h");
728 if ( ( (GNUNET_YES == do_round) &&
734 unit = _( /* time unit */ "day");
736 unit = _( /* time unit */ "days");
742 GNUNET_snprintf (buf, sizeof (buf),
743 "%llu %s", dval, unit);
749 * "asctime", except for GNUnet time. Converts a GNUnet internal
750 * absolute time (which is in UTC) to a string in local time.
751 * Note that the returned value will be overwritten if this function
754 * @param t the absolute time to convert
755 * @return timestamp in human-readable form in local time
758 GNUNET_STRINGS_absolute_time_to_string (struct GNUNET_TIME_Absolute t)
760 static char buf[255];
764 if (t.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
765 return _("end of time");
766 tt = t.abs_value_us / 1000LL / 1000LL;
767 tp = localtime (&tt);
768 /* This is hacky, but i don't know a way to detect libc character encoding.
769 * Just expect utf8 from glibc these days.
770 * As for msvcrt, use the wide variant, which always returns utf16
771 * (otherwise we'd have to detect current codepage or use W32API character
772 * set conversion routines to convert to UTF8).
775 strftime (buf, sizeof (buf), "%a %b %d %H:%M:%S %Y", tp);
778 static wchar_t wbuf[255];
782 wcsftime (wbuf, sizeof (wbuf) / sizeof (wchar_t),
783 L"%a %b %d %H:%M:%S %Y", tp);
785 ssize = sizeof (buf);
786 conved = u16_to_u8 (wbuf, sizeof (wbuf) / sizeof (wchar_t),
787 (uint8_t *) buf, &ssize);
788 if (conved != (uint8_t *) buf)
790 strncpy (buf, (char *) conved, sizeof (buf));
802 * Returns a pointer to a part of filename (allocates nothing)!
804 * @param filename filename to extract basename from
805 * @return short (base) name of the file (that is, everything following the
806 * last directory separator in filename. If filename ends with a
807 * directory separator, the result will be a zero-length string.
808 * If filename has no directory separators, the result is filename
812 GNUNET_STRINGS_get_short_name (const char *filename)
814 const char *short_fn = filename;
817 while (NULL != (ss = strstr (short_fn, DIR_SEPARATOR_STR))
825 * Get the decoded value corresponding to a character according to Crockford
828 * @param a a character
829 * @return corresponding numeric value
832 getValue__ (unsigned char a)
848 /* also consider U to be V */
856 if ((a >= '0') && (a <= '9'))
858 if ((a >= 'a') && (a <= 'z'))
860 /* return (a - 'a' + 10); */
862 if ((a >= 'A') && (a <= 'Z'))
872 return (a - 'A' + 10 - dec);
879 * Convert binary data to ASCII encoding using Crockford Base32 encoding.
880 * Returns a pointer to the byte after the last byte in the string, that
881 * is where the 0-terminator was placed if there was room.
883 * @param data data to encode
884 * @param size size of data (in bytes)
885 * @param out buffer to fill
886 * @param out_size size of the buffer. Must be large enough to hold
887 * (size * 8 + 4) / 5 bytes
888 * @return pointer to the next byte in @a out or NULL on error.
891 GNUNET_STRINGS_data_to_string (const void *data,
897 * 32 characters for encoding
899 static char *encTable__ = "0123456789ABCDEFGHJKMNPQRSTVWXYZ";
904 const unsigned char *udata;
907 if (out_size < (size * 8 + 4) / 5)
916 while ((rpos < size) || (vbit > 0))
918 if ((rpos < size) && (vbit < 5))
920 bits = (bits << 8) | udata[rpos++]; /* eat 8 more bits */
925 bits <<= (5 - vbit); /* zero-padding */
926 GNUNET_assert (vbit == ((size * 8) % 5));
929 if (wpos >= out_size)
934 out[wpos++] = encTable__[(bits >> (vbit - 5)) & 31];
937 GNUNET_assert (0 == vbit);
945 * Return the base32crockford encoding of the given buffer.
947 * The returned string will be freshly allocated, and must be free'd
948 * with GNUNET_free().
950 * @param buffer with data
951 * @param size size of the buffer
952 * @return freshly allocated, null-terminated string
955 GNUNET_STRINGS_data_to_string_alloc (const void *buf,
959 size_t len = size * 8;
965 str_buf = GNUNET_malloc (len + 1);
966 end = GNUNET_STRINGS_data_to_string (buf, size, str_buf, len);
969 GNUNET_free (str_buf);
978 * Convert Crockford Base32hex encoding back to data.
979 * @a out_size must match exactly the size of the data before it was encoded.
981 * @param enc the encoding
982 * @param enclen number of characters in @a enc (without 0-terminator, which can be missing)
983 * @param out location where to store the decoded data
984 * @param out_size size of the output buffer @a out
985 * @return #GNUNET_OK on success, #GNUNET_SYSERR if result has the wrong encoding
988 GNUNET_STRINGS_string_to_data (const char *enc, size_t enclen,
989 void *out, size_t out_size)
998 unsigned int encoded_len = out_size * 8;
1004 return GNUNET_SYSERR;
1009 if ((encoded_len % 5) > 0)
1011 vbit = encoded_len % 5; /* padding! */
1013 bits = (ret = getValue__ (enc[--rpos])) >> shift;
1019 bits = (ret = getValue__ (enc[--rpos]));
1021 if ((encoded_len + shift) / 5 != enclen)
1022 return GNUNET_SYSERR;
1024 return GNUNET_SYSERR;
1030 return GNUNET_SYSERR;
1032 bits = ((ret = getValue__ (enc[--rpos])) << vbit) | bits;
1034 return GNUNET_SYSERR;
1038 uout[--wpos] = (unsigned char) bits;
1045 return GNUNET_SYSERR;
1051 * Parse a path that might be an URI.
1053 * @param path path to parse. Must be NULL-terminated.
1054 * @param scheme_part a pointer to 'char *' where a pointer to a string that
1055 * represents the URI scheme will be stored. Can be NULL. The string is
1056 * allocated by the function, and should be freed by GNUNET_free() when
1057 * it is no longer needed.
1058 * @param path_part a pointer to 'const char *' where a pointer to the path
1059 * part of the URI will be stored. Can be NULL. Points to the same block
1060 * of memory as 'path', and thus must not be freed. Might point to '\0',
1061 * if path part is zero-length.
1062 * @return GNUNET_YES if it's an URI, GNUNET_NO otherwise. If 'path' is not
1063 * an URI, '* scheme_part' and '*path_part' will remain unchanged
1064 * (if they weren't NULL).
1067 GNUNET_STRINGS_parse_uri (const char *path,
1069 const char **path_part)
1075 const char *post_scheme_part = NULL;
1076 len = strlen (path);
1077 for (end = 0, i = 0; !end && i < len; i++)
1082 if ( (path[i] == ':') && (i > 0) )
1087 if (!((path[i] >= 'A' && path[i] <= 'Z') || (path[i] >= 'a' && path[i] <= 'z')
1088 || (path[i] >= '0' && path[i] <= '9') || path[i] == '+' || path[i] == '-'
1089 || (path[i] == '.')))
1102 post_scheme_part = &path[i];
1109 if (post_scheme_part == NULL)
1113 *scheme_part = GNUNET_malloc (post_scheme_part - path + 1);
1114 GNUNET_memcpy (*scheme_part, path, post_scheme_part - path);
1115 (*scheme_part)[post_scheme_part - path] = '\0';
1118 *path_part = post_scheme_part;
1124 * Check whether @a filename is absolute or not, and if it's an URI
1126 * @param filename filename to check
1127 * @param can_be_uri #GNUNET_YES to check for being URI, #GNUNET_NO - to
1128 * assume it's not URI
1129 * @param r_is_uri a pointer to an int that is set to #GNUNET_YES if @a filename
1130 * is URI and to #GNUNET_NO otherwise. Can be NULL. If @a can_be_uri is
1131 * not #GNUNET_YES, `* r_is_uri` is set to #GNUNET_NO.
1132 * @param r_uri_scheme a pointer to a char * that is set to a pointer to URI scheme.
1133 * The string is allocated by the function, and should be freed with
1134 * GNUNET_free(). Can be NULL.
1135 * @return #GNUNET_YES if @a filename is absolute, #GNUNET_NO otherwise.
1138 GNUNET_STRINGS_path_is_absolute (const char *filename,
1141 char **r_uri_scheme)
1146 const char *post_scheme_path;
1149 /* consider POSIX paths to be absolute too, even on W32,
1150 * as plibc expansion will fix them for us.
1152 if (filename[0] == '/')
1156 is_uri = GNUNET_STRINGS_parse_uri (filename, &uri, &post_scheme_path);
1162 *r_uri_scheme = uri;
1164 GNUNET_free_non_null (uri);
1166 len = strlen(post_scheme_path);
1167 /* Special check for file:///c:/blah
1168 * We want to parse 'c:/', not '/c:/'
1170 if (post_scheme_path[0] == '/' && len >= 3 && post_scheme_path[2] == ':')
1171 post_scheme_path = &post_scheme_path[1];
1173 return GNUNET_STRINGS_path_is_absolute (post_scheme_path, GNUNET_NO, NULL, NULL);
1179 *r_is_uri = GNUNET_NO;
1182 len = strlen (filename);
1184 ((filename[0] >= 'A' && filename[0] <= 'Z')
1185 || (filename[0] >= 'a' && filename[0] <= 'z'))
1186 && filename[1] == ':' && (filename[2] == '/' || filename[2] == '\\'))
1193 #define _IFMT 0170000 /* type of file */
1194 #define _IFLNK 0120000 /* symbolic link */
1195 #define S_ISLNK(m) (((m)&_IFMT) == _IFLNK)
1200 * Perform @a checks on @a filename.
1202 * @param filename file to check
1203 * @param checks checks to perform
1204 * @return #GNUNET_YES if all checks pass, #GNUNET_NO if at least one of them
1205 * fails, #GNUNET_SYSERR when a check can't be performed
1208 GNUNET_STRINGS_check_filename (const char *filename,
1209 enum GNUNET_STRINGS_FilenameCheck checks)
1212 if ( (NULL == filename) || (filename[0] == '\0') )
1213 return GNUNET_SYSERR;
1214 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_ABSOLUTE))
1215 if (!GNUNET_STRINGS_path_is_absolute (filename, GNUNET_NO, NULL, NULL))
1217 if (0 != (checks & (GNUNET_STRINGS_CHECK_EXISTS
1218 | GNUNET_STRINGS_CHECK_IS_DIRECTORY
1219 | GNUNET_STRINGS_CHECK_IS_LINK)))
1221 if (0 != STAT (filename, &st))
1223 if (0 != (checks & GNUNET_STRINGS_CHECK_EXISTS))
1226 return GNUNET_SYSERR;
1229 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_DIRECTORY))
1230 if (!S_ISDIR (st.st_mode))
1232 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_LINK))
1233 if (!S_ISLNK (st.st_mode))
1240 * Tries to convert @a zt_addr string to an IPv6 address.
1241 * The string is expected to have the format "[ABCD::01]:80".
1243 * @param zt_addr 0-terminated string. May be mangled by the function.
1244 * @param addrlen length of @a zt_addr (not counting 0-terminator).
1245 * @param r_buf a buffer to fill. Initially gets filled with zeroes,
1246 * then its sin6_port, sin6_family and sin6_addr are set appropriately.
1247 * @return #GNUNET_OK if conversion succeded.
1248 * #GNUNET_SYSERR otherwise, in which
1249 * case the contents of @a r_buf are undefined.
1252 GNUNET_STRINGS_to_address_ipv6 (const char *zt_addr,
1254 struct sockaddr_in6 *r_buf)
1256 char zbuf[addrlen + 1];
1262 return GNUNET_SYSERR;
1263 GNUNET_memcpy (zbuf, zt_addr, addrlen);
1266 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1267 _("IPv6 address did not start with `['\n"));
1268 return GNUNET_SYSERR;
1270 zbuf[addrlen] = '\0';
1271 port_colon = strrchr (zbuf, ':');
1272 if (NULL == port_colon)
1274 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1275 _("IPv6 address did contain ':' to separate port number\n"));
1276 return GNUNET_SYSERR;
1278 if (']' != *(port_colon - 1))
1280 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1281 _("IPv6 address did contain ']' before ':' to separate port number\n"));
1282 return GNUNET_SYSERR;
1284 ret = SSCANF (port_colon, ":%u", &port);
1285 if ( (1 != ret) || (port > 65535) )
1287 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1288 _("IPv6 address did contain a valid port number after the last ':'\n"));
1289 return GNUNET_SYSERR;
1291 *(port_colon-1) = '\0';
1292 memset (r_buf, 0, sizeof (struct sockaddr_in6));
1293 ret = inet_pton (AF_INET6, &zbuf[1], &r_buf->sin6_addr);
1296 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1297 _("Invalid IPv6 address `%s': %s\n"),
1300 return GNUNET_SYSERR;
1302 r_buf->sin6_port = htons (port);
1303 r_buf->sin6_family = AF_INET6;
1304 #if HAVE_SOCKADDR_IN_SIN_LEN
1305 r_buf->sin6_len = (u_char) sizeof (struct sockaddr_in6);
1312 * Tries to convert 'zt_addr' string to an IPv4 address.
1313 * The string is expected to have the format "1.2.3.4:80".
1315 * @param zt_addr 0-terminated string. May be mangled by the function.
1316 * @param addrlen length of @a zt_addr (not counting 0-terminator).
1317 * @param r_buf a buffer to fill.
1318 * @return #GNUNET_OK if conversion succeded.
1319 * #GNUNET_SYSERR otherwise, in which case
1320 * the contents of @a r_buf are undefined.
1323 GNUNET_STRINGS_to_address_ipv4 (const char *zt_addr,
1325 struct sockaddr_in *r_buf)
1327 unsigned int temps[4];
1332 return GNUNET_SYSERR;
1333 cnt = SSCANF (zt_addr,
1341 return GNUNET_SYSERR;
1342 for (cnt = 0; cnt < 4; cnt++)
1343 if (temps[cnt] > 0xFF)
1344 return GNUNET_SYSERR;
1346 return GNUNET_SYSERR;
1347 r_buf->sin_family = AF_INET;
1348 r_buf->sin_port = htons (port);
1349 r_buf->sin_addr.s_addr = htonl ((temps[0] << 24) + (temps[1] << 16) +
1350 (temps[2] << 8) + temps[3]);
1351 #if HAVE_SOCKADDR_IN_SIN_LEN
1352 r_buf->sin_len = (u_char) sizeof (struct sockaddr_in);
1359 * Tries to convert @a addr string to an IP (v4 or v6) address.
1360 * Will automatically decide whether to treat 'addr' as v4 or v6 address.
1362 * @param addr a string, may not be 0-terminated.
1363 * @param addrlen number of bytes in @a addr (if addr is 0-terminated,
1364 * 0-terminator should not be counted towards addrlen).
1365 * @param r_buf a buffer to fill.
1366 * @return #GNUNET_OK if conversion succeded. #GNUNET_SYSERR otherwise, in which
1367 * case the contents of @a r_buf are undefined.
1370 GNUNET_STRINGS_to_address_ip (const char *addr,
1372 struct sockaddr_storage *r_buf)
1375 return GNUNET_STRINGS_to_address_ipv6 (addr,
1377 (struct sockaddr_in6 *) r_buf);
1378 return GNUNET_STRINGS_to_address_ipv4 (addr,
1380 (struct sockaddr_in *) r_buf);
1385 * Parse an address given as a string into a
1386 * `struct sockaddr`.
1388 * @param addr the address
1389 * @param[out] af set to the parsed address family (i.e. AF_INET)
1390 * @param[out] sa set to the parsed address
1391 * @return 0 on error, otherwise number of bytes in @a sa
1394 GNUNET_STRINGS_parse_socket_addr (const char *addr,
1396 struct sockaddr **sa)
1398 char *cp = GNUNET_strdup (addr);
1404 *sa = GNUNET_malloc (sizeof (struct sockaddr_in6));
1406 GNUNET_STRINGS_to_address_ipv6 (cp,
1408 (struct sockaddr_in6 *) *sa))
1417 return sizeof (struct sockaddr_in6);
1422 *sa = GNUNET_malloc (sizeof (struct sockaddr_in));
1424 GNUNET_STRINGS_to_address_ipv4 (cp,
1426 (struct sockaddr_in *) *sa))
1435 return sizeof (struct sockaddr_in);
1441 * Makes a copy of argv that consists of a single memory chunk that can be
1442 * freed with a single call to GNUNET_free();
1444 static char *const *
1445 _make_continuous_arg_copy (int argc,
1448 size_t argvsize = 0;
1452 for (i = 0; i < argc; i++)
1453 argvsize += strlen (argv[i]) + 1 + sizeof (char *);
1454 new_argv = GNUNET_malloc (argvsize + sizeof (char *));
1455 p = (char *) &new_argv[argc + 1];
1456 for (i = 0; i < argc; i++)
1459 strcpy (p, argv[i]);
1460 p += strlen (argv[i]) + 1;
1462 new_argv[argc] = NULL;
1463 return (char *const *) new_argv;
1468 * Returns utf-8 encoded arguments.
1469 * Does nothing (returns a copy of argc and argv) on any platform
1471 * Returned argv has u8argv[u8argc] == NULL.
1472 * Returned argv is a single memory block, and can be freed with a single
1473 * GNUNET_free() call.
1475 * @param argc argc (as given by main())
1476 * @param argv argv (as given by main())
1477 * @param u8argc a location to store new argc in (though it's th same as argc)
1478 * @param u8argv a location to store new argv in
1479 * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
1482 GNUNET_STRINGS_get_utf8_args (int argc,
1485 char *const **u8argv)
1492 char **split_u8argv;
1494 wcmd = GetCommandLineW ();
1496 return GNUNET_SYSERR;
1497 wargv = CommandLineToArgvW (wcmd, &wargc);
1499 return GNUNET_SYSERR;
1501 split_u8argv = GNUNET_malloc (argc * sizeof (char *));
1503 for (i = 0; i < wargc; i++)
1506 /* Hopefully it will allocate us NUL-terminated strings... */
1507 split_u8argv[i] = (char *) u16_to_u8 (wargv[i], wcslen (wargv[i]) + 1, NULL, &strl);
1508 if (NULL == split_u8argv[i])
1511 for (j = 0; j < i; j++)
1512 free (split_u8argv[j]);
1513 GNUNET_free (split_u8argv);
1515 return GNUNET_SYSERR;
1519 *u8argv = _make_continuous_arg_copy (wargc, split_u8argv);
1522 for (i = 0; i < wargc; i++)
1523 free (split_u8argv[i]);
1524 free (split_u8argv);
1527 char *const *new_argv = (char *const *) _make_continuous_arg_copy (argc, argv);
1536 * Parse the given port policy. The format is
1537 * "[!]SPORT[-DPORT]".
1539 * @param port_policy string to parse
1540 * @param pp policy to fill in
1541 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the
1542 * @a port_policy is malformed
1545 parse_port_policy (const char *port_policy,
1546 struct GNUNET_STRINGS_PortPolicy *pp)
1556 pp->negate_portrange = GNUNET_YES;
1559 if (2 == sscanf (pos,
1568 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1569 _("Port not in range\n"));
1570 return GNUNET_SYSERR;
1572 pp->start_port = (uint16_t) s;
1573 pp->end_port = (uint16_t) e;
1576 if (1 == sscanf (pos,
1584 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1585 _("Port not in range\n"));
1586 return GNUNET_SYSERR;
1589 pp->start_port = (uint16_t) s;
1590 pp->end_port = (uint16_t) s;
1593 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1594 _("Malformed port policy `%s'\n"),
1596 return GNUNET_SYSERR;
1601 * Parse an IPv4 network policy. The argument specifies a list of
1602 * subnets. The format is
1603 * <tt>(network[/netmask][:SPORT[-DPORT]];)*</tt> (no whitespace, must
1604 * be terminated with a semicolon). The network must be given in
1605 * dotted-decimal notation. The netmask can be given in CIDR notation
1606 * (/16) or in dotted-decimal (/255.255.0.0).
1608 * @param routeListX a string specifying the IPv4 subnets
1609 * @return the converted list, terminated with all zeros;
1610 * NULL if the synatx is flawed
1612 struct GNUNET_STRINGS_IPv4NetworkPolicy *
1613 GNUNET_STRINGS_parse_ipv4_policy (const char *routeListX)
1621 unsigned int temps[8];
1623 struct GNUNET_STRINGS_IPv4NetworkPolicy *result;
1628 if (NULL == routeListX)
1630 len = strlen (routeListX);
1633 routeList = GNUNET_strdup (routeListX);
1635 for (i = 0; i < len; i++)
1636 if (routeList[i] == ';')
1638 result = GNUNET_malloc (sizeof (struct GNUNET_STRINGS_IPv4NetworkPolicy) * (count + 1));
1643 for (colon = pos; ':' != routeList[colon]; colon++)
1644 if ( (';' == routeList[colon]) ||
1645 ('\0' == routeList[colon]) )
1647 for (end = colon; ';' != routeList[end]; end++)
1648 if ('\0' == routeList[end])
1650 if ('\0' == routeList[end])
1652 routeList[end] = '\0';
1653 if (':' == routeList[colon])
1655 routeList[colon] = '\0';
1656 if (GNUNET_OK != parse_port_policy (&routeList[colon + 1],
1661 SSCANF (&routeList[pos],
1662 "%u.%u.%u.%u/%u.%u.%u.%u",
1673 for (j = 0; j < 8; j++)
1674 if (temps[j] > 0xFF)
1676 LOG (GNUNET_ERROR_TYPE_WARNING,
1677 _("Invalid format for IP: `%s'\n"),
1679 GNUNET_free (result);
1680 GNUNET_free (routeList);
1683 result[i].network.s_addr =
1684 htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
1686 result[i].netmask.s_addr =
1687 htonl ((temps[4] << 24) + (temps[5] << 16) + (temps[6] << 8) +
1693 /* try second notation */
1695 SSCANF (&routeList[pos],
1704 for (j = 0; j < 4; j++)
1705 if (temps[j] > 0xFF)
1707 LOG (GNUNET_ERROR_TYPE_WARNING,
1708 _("Invalid format for IP: `%s'\n"),
1710 GNUNET_free (result);
1711 GNUNET_free (routeList);
1714 result[i].network.s_addr =
1715 htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
1717 if ((slash <= 32) && (slash >= 0))
1719 result[i].netmask.s_addr = 0;
1722 result[i].netmask.s_addr =
1723 (result[i].netmask.s_addr >> 1) + 0x80000000;
1726 result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
1733 LOG (GNUNET_ERROR_TYPE_WARNING,
1734 _("Invalid network notation ('/%d' is not legal in IPv4 CIDR)."),
1736 GNUNET_free (result);
1737 GNUNET_free (routeList);
1738 return NULL; /* error */
1741 /* try third notation */
1744 SSCANF (&routeList[pos],
1752 for (j = 0; j < 4; j++)
1753 if (temps[j] > 0xFF)
1755 LOG (GNUNET_ERROR_TYPE_WARNING,
1756 _("Invalid format for IP: `%s'\n"),
1758 GNUNET_free (result);
1759 GNUNET_free (routeList);
1762 result[i].network.s_addr =
1763 htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
1765 result[i].netmask.s_addr = 0;
1768 result[i].netmask.s_addr = (result[i].netmask.s_addr >> 1) + 0x80000000;
1771 result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
1776 LOG (GNUNET_ERROR_TYPE_WARNING,
1777 _("Invalid format for IP: `%s'\n"),
1779 GNUNET_free (result);
1780 GNUNET_free (routeList);
1781 return NULL; /* error */
1783 if (pos < strlen (routeList))
1785 LOG (GNUNET_ERROR_TYPE_WARNING,
1786 _("Invalid format: `%s'\n"),
1788 GNUNET_free (result);
1789 GNUNET_free (routeList);
1790 return NULL; /* oops */
1792 GNUNET_free (routeList);
1793 return result; /* ok */
1798 * Parse an IPv6 network policy. The argument specifies a list of
1799 * subnets. The format is <tt>(network[/netmask[:SPORT[-DPORT]]];)*</tt>
1800 * (no whitespace, must be terminated with a semicolon). The network
1801 * must be given in colon-hex notation. The netmask must be given in
1802 * CIDR notation (/16) or can be omitted to specify a single host.
1803 * Note that the netmask is mandatory if ports are specified.
1805 * @param routeListX a string specifying the policy
1806 * @return the converted list, 0-terminated, NULL if the synatx is flawed
1808 struct GNUNET_STRINGS_IPv6NetworkPolicy *
1809 GNUNET_STRINGS_parse_ipv6_policy (const char *routeListX)
1819 struct GNUNET_STRINGS_IPv6NetworkPolicy *result;
1825 if (NULL == routeListX)
1827 len = strlen (routeListX);
1830 routeList = GNUNET_strdup (routeListX);
1832 for (i = 0; i < len; i++)
1833 if (';' == routeList[i])
1835 if (';' != routeList[len - 1])
1837 LOG (GNUNET_ERROR_TYPE_WARNING,
1838 _("Invalid network notation (does not end with ';': `%s')\n"),
1840 GNUNET_free (routeList);
1844 result = GNUNET_malloc (sizeof (struct GNUNET_STRINGS_IPv6NetworkPolicy) * (count + 1));
1850 while (';' != routeList[pos])
1853 while ((slash >= start) && (routeList[slash] != '/'))
1858 memset (&result[i].netmask,
1860 sizeof (struct in6_addr));
1865 routeList[pos] = '\0';
1866 for (colon = pos; ':' != routeList[colon]; colon--)
1867 if ('/' == routeList[colon])
1869 if (':' == routeList[colon])
1871 routeList[colon] = '\0';
1872 if (GNUNET_OK != parse_port_policy (&routeList[colon + 1],
1875 GNUNET_free (result);
1876 GNUNET_free (routeList);
1880 ret = inet_pton (AF_INET6, &routeList[slash + 1], &result[i].netmask);
1884 if ((1 != SSCANF (&routeList[slash + 1], "%u", &bits)) || (bits > 128))
1887 LOG (GNUNET_ERROR_TYPE_WARNING,
1888 _("Wrong format `%s' for netmask\n"),
1889 &routeList[slash + 1]);
1893 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "inet_pton");
1895 GNUNET_free (result);
1896 GNUNET_free (routeList);
1902 result[i].netmask.s6_addr[off++] = 0xFF;
1907 result[i].netmask.s6_addr[off] =
1908 (result[i].netmask.s6_addr[off] >> 1) + 0x80;
1913 routeList[slash] = '\0';
1914 ret = inet_pton (AF_INET6, &routeList[start], &result[i].network);
1918 LOG (GNUNET_ERROR_TYPE_WARNING,
1919 _("Wrong format `%s' for network\n"),
1920 &routeList[slash + 1]);
1922 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR,
1924 GNUNET_free (result);
1925 GNUNET_free (routeList);
1931 GNUNET_free (routeList);
1937 /** ******************** Base64 encoding ***********/
1939 #define FILLCHAR '='
1941 "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "abcdefghijklmnopqrstuvwxyz" "0123456789+/";
1945 * Encode into Base64.
1947 * @param data the data to encode
1948 * @param len the length of the input
1949 * @param output where to write the output (*output should be NULL,
1951 * @return the size of the output
1954 GNUNET_STRINGS_base64_encode (const char *data,
1964 opt = GNUNET_malloc (2 + (len * 4 / 3) + 8);
1966 for (i = 0; i < len; ++i)
1968 c = (data[i] >> 2) & 0x3f;
1969 opt[ret++] = cvt[(int) c];
1970 c = (data[i] << 4) & 0x3f;
1972 c |= (data[i] >> 4) & 0x0f;
1973 opt[ret++] = cvt[(int) c];
1976 c = (data[i] << 2) & 0x3f;
1978 c |= (data[i] >> 6) & 0x03;
1979 opt[ret++] = cvt[(int) c];
1984 opt[ret++] = FILLCHAR;
1989 opt[ret++] = cvt[(int) c];
1993 opt[ret++] = FILLCHAR;
1996 opt[ret++] = FILLCHAR;
2000 #define cvtfind(a)( (((a) >= 'A')&&((a) <= 'Z'))? (a)-'A'\
2001 :(((a)>='a')&&((a)<='z')) ? (a)-'a'+26\
2002 :(((a)>='0')&&((a)<='9')) ? (a)-'0'+52\
2004 :((a) == '/') ? 63 : -1)
2008 * Decode from Base64.
2010 * @param data the data to encode
2011 * @param len the length of the input
2012 * @param output where to write the output (*output should be NULL,
2014 * @return the size of the output
2017 GNUNET_STRINGS_base64_decode (const char *data,
2018 size_t len, char **output)
2025 #define CHECK_CRLF while (data[i] == '\r' || data[i] == '\n') {\
2026 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK, "ignoring CR/LF\n"); \
2028 if (i >= len) goto END; \
2031 *output = GNUNET_malloc ((len * 3 / 4) + 8);
2032 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2033 "base64_decode decoding len=%d\n",
2035 for (i = 0; i < len; ++i)
2038 if (FILLCHAR == data[i])
2040 c = (char) cvtfind (data[i]);
2043 c1 = (char) cvtfind (data[i]);
2044 c = (c << 2) | ((c1 >> 4) & 0x3);
2045 (*output)[ret++] = c;
2052 c = (char) cvtfind (c);
2053 c1 = ((c1 << 4) & 0xf0) | ((c >> 2) & 0xf);
2054 (*output)[ret++] = c1;
2063 c1 = (char) cvtfind (c1);
2064 c = ((c << 6) & 0xc0) | c1;
2065 (*output)[ret++] = c;
2076 /* end of strings.c */