/*
This file is part of GNUnet.
Copyright (C) 2005-2017 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file util/strings.c
* @brief string functions
* @author Nils Durner
* @author Christian Grothoff
*/
#include "platform.h"
#if HAVE_ICONV
#include
#endif
#include "gnunet_crypto_lib.h"
#include "gnunet_strings_lib.h"
#include
#include
#include
#define LOG(kind, ...) GNUNET_log_from (kind, "util-strings", __VA_ARGS__)
#define LOG_STRERROR(kind, syscall) \
GNUNET_log_from_strerror (kind, "util-strings", syscall)
/**
* Fill a buffer of the given size with
* count 0-terminated strings (given as varargs).
* If "buffer" is NULL, only compute the amount of
* space required (sum of "strlen(arg)+1").
*
* Unlike using "snprintf" with "%s", this function
* will add 0-terminators after each string. The
* #GNUNET_string_buffer_tokenize() function can be
* used to parse the buffer back into individual
* strings.
*
* @param buffer the buffer to fill with strings, can
* be NULL in which case only the necessary
* amount of space will be calculated
* @param size number of bytes available in buffer
* @param count number of strings that follow
* @param ... count 0-terminated strings to copy to buffer
* @return number of bytes written to the buffer
* (or number of bytes that would have been written)
*/
size_t
GNUNET_STRINGS_buffer_fill (char *buffer, size_t size, unsigned int count, ...)
{
size_t needed;
size_t slen;
const char *s;
va_list ap;
needed = 0;
va_start (ap, count);
while (count > 0)
{
s = va_arg (ap, const char *);
slen = strlen (s) + 1;
if (buffer != NULL)
{
GNUNET_assert (needed + slen <= size);
GNUNET_memcpy (&buffer[needed], s, slen);
}
needed += slen;
count--;
}
va_end (ap);
return needed;
}
/**
* Convert a peer path to a human-readable string.
*
* @param pids array of PIDs to convert to a string
* @param num_pids length of the @a pids array
* @return string representing the array of @a pids
*/
char *
GNUNET_STRINGS_pp2s (const struct GNUNET_PeerIdentity *pids,
unsigned int num_pids)
{
char *buf;
size_t off;
size_t plen = num_pids * 5 + 1;
off = 0;
buf = GNUNET_malloc (plen);
for (unsigned int i = 0; i < num_pids; i++)
{
off += GNUNET_snprintf (&buf[off],
plen - off,
"%s%s",
GNUNET_i2s (&pids[i]),
(i == num_pids - 1) ? "" : "-");
}
return buf;
}
/**
* Given a buffer of a given size, find "count"
* 0-terminated strings in the buffer and assign
* the count (varargs) of type "const char**" to the
* locations of the respective strings in the
* buffer.
*
* @param buffer the buffer to parse
* @param size size of the buffer
* @param count number of strings to locate
* @return offset of the character after the last 0-termination
* in the buffer, or 0 on error.
*/
unsigned int
GNUNET_STRINGS_buffer_tokenize (const char *buffer,
size_t size,
unsigned int count,
...)
{
unsigned int start;
unsigned int needed;
const char **r;
va_list ap;
needed = 0;
va_start (ap, count);
while (count > 0)
{
r = va_arg (ap, const char **);
start = needed;
while ((needed < size) && (buffer[needed] != '\0'))
needed++;
if (needed == size)
{
va_end (ap);
return 0; /* error */
}
*r = &buffer[start];
needed++; /* skip 0-termination */
count--;
}
va_end (ap);
return needed;
}
/**
* Convert a given filesize into a fancy human-readable format.
*
* @param size number of bytes
* @return fancy representation of the size (possibly rounded) for humans
*/
char *
GNUNET_STRINGS_byte_size_fancy (unsigned long long size)
{
const char *unit = _ (/* size unit */ "b");
char *ret;
if (size > 5 * 1024)
{
size = size / 1024;
unit = "KiB";
if (size > 5 * 1024)
{
size = size / 1024;
unit = "MiB";
if (size > 5 * 1024)
{
size = size / 1024;
unit = "GiB";
if (size > 5 * 1024)
{
size = size / 1024;
unit = "TiB";
}
}
}
}
ret = GNUNET_malloc (32);
GNUNET_snprintf (ret, 32, "%llu %s", size, unit);
return ret;
}
/**
* Like strlcpy but portable. The given string @a src is copied until its null
* byte or until @a n - 1 bytes have been read. The destination buffer is
* guaranteed to be null-terminated.
*
* @param dst destination of the copy (must be @a n bytes long)
* @param src source of the copy (at most @a n - 1 bytes will be read)
* @param n the length of the string to copy, including its terminating null
* byte
* @return the length of the string that was copied, excluding the terminating
* null byte
*/
size_t
GNUNET_strlcpy (char *dst, const char *src, size_t n)
{
size_t slen;
GNUNET_assert (0 != n);
slen = strnlen (src, n - 1);
memcpy (dst, src, slen);
dst[slen] = '\0';
return slen;
}
/**
* Unit conversion table entry for 'convert_with_table'.
*/
struct ConversionTable
{
/**
* Name of the unit (or NULL for end of table).
*/
const char *name;
/**
* Factor to apply for this unit.
*/
unsigned long long value;
};
/**
* Convert a string of the form "4 X 5 Y" into a numeric value
* by interpreting "X" and "Y" as units and then multiplying
* the numbers with the values associated with the respective
* unit from the conversion table.
*
* @param input input string to parse
* @param table table with the conversion of unit names to numbers
* @param output where to store the result
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
static int
convert_with_table (const char *input,
const struct ConversionTable *table,
unsigned long long *output)
{
unsigned long long ret;
char *in;
const char *tok;
unsigned long long last;
unsigned int i;
ret = 0;
last = 0;
in = GNUNET_strdup (input);
for (tok = strtok (in, " "); tok != NULL; tok = strtok (NULL, " "))
{
do
{
i = 0;
while ((table[i].name != NULL) && (0 != strcasecmp (table[i].name, tok)))
i++;
if (table[i].name != NULL)
{
last *= table[i].value;
break; /* next tok */
}
else
{
char *endptr;
ret += last;
errno = 0;
last = strtoull (tok, &endptr, 10);
if ((0 != errno) || (endptr == tok))
{
GNUNET_free (in);
return GNUNET_SYSERR; /* expected number */
}
if ('\0' == endptr[0])
break; /* next tok */
else
tok = endptr; /* and re-check (handles times like "10s") */
}
}
while (GNUNET_YES);
}
ret += last;
*output = ret;
GNUNET_free (in);
return GNUNET_OK;
}
/**
* Convert a given fancy human-readable size to bytes.
*
* @param fancy_size human readable string (i.e. 1 MB)
* @param size set to the size in bytes
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
int
GNUNET_STRINGS_fancy_size_to_bytes (const char *fancy_size,
unsigned long long *size)
{
static const struct ConversionTable table[] =
{ { "B", 1 },
{ "KiB", 1024 },
{ "kB", 1000 },
{ "MiB", 1024 * 1024 },
{ "MB", 1000 * 1000 },
{ "GiB", 1024 * 1024 * 1024 },
{ "GB", 1000 * 1000 * 1000 },
{ "TiB", 1024LL * 1024LL * 1024LL * 1024LL },
{ "TB", 1000LL * 1000LL * 1000LL * 1024LL },
{ "PiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL },
{ "PB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL },
{ "EiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL * 1024LL },
{ "EB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL * 1000LL },
{ NULL, 0 } };
return convert_with_table (fancy_size, table, size);
}
/**
* Convert a given fancy human-readable time to our internal
* representation.
*
* @param fancy_time human readable string (i.e. 1 minute)
* @param rtime set to the relative time
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
int
GNUNET_STRINGS_fancy_time_to_relative (const char *fancy_time,
struct GNUNET_TIME_Relative *rtime)
{
static const struct ConversionTable table[] =
{ { "us", 1 },
{ "ms", 1000 },
{ "s", 1000 * 1000LL },
{ "second", 1000 * 1000LL },
{ "seconds", 1000 * 1000LL },
{ "\"", 1000 * 1000LL },
{ "m", 60 * 1000 * 1000LL },
{ "min", 60 * 1000 * 1000LL },
{ "minute", 60 * 1000 * 1000LL },
{ "minutes", 60 * 1000 * 1000LL },
{ "'", 60 * 1000 * 1000LL },
{ "h", 60 * 60 * 1000 * 1000LL },
{ "hour", 60 * 60 * 1000 * 1000LL },
{ "hours", 60 * 60 * 1000 * 1000LL },
{ "d", 24 * 60 * 60 * 1000LL * 1000LL },
{ "day", 24 * 60 * 60 * 1000LL * 1000LL },
{ "days", 24 * 60 * 60 * 1000LL * 1000LL },
{ "week", 7 * 24 * 60 * 60 * 1000LL * 1000LL },
{ "weeks", 7 * 24 * 60 * 60 * 1000LL * 1000LL },
{ "year", 31536000000000LL /* year */ },
{ "years", 31536000000000LL /* year */ },
{ "a", 31536000000000LL /* year */ },
{ NULL, 0 } };
int ret;
unsigned long long val;
if (0 == strcasecmp ("forever", fancy_time))
{
*rtime = GNUNET_TIME_UNIT_FOREVER_REL;
return GNUNET_OK;
}
ret = convert_with_table (fancy_time, table, &val);
rtime->rel_value_us = (uint64_t) val;
return ret;
}
/**
* Convert a given fancy human-readable time to our internal
* representation. The human-readable time is expected to be
* in local time, whereas the returned value will be in UTC.
*
* @param fancy_time human readable string (i.e. %Y-%m-%d %H:%M:%S)
* @param atime set to the absolute time
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
int
GNUNET_STRINGS_fancy_time_to_absolute (const char *fancy_time,
struct GNUNET_TIME_Absolute *atime)
{
struct tm tv;
time_t t;
const char *eos;
if (0 == strcasecmp ("end of time", fancy_time))
{
*atime = GNUNET_TIME_UNIT_FOREVER_ABS;
return GNUNET_OK;
}
eos = &fancy_time[strlen (fancy_time)];
memset (&tv, 0, sizeof(tv));
if ((eos != strptime (fancy_time, "%a %b %d %H:%M:%S %Y", &tv)) &&
(eos != strptime (fancy_time, "%c", &tv)) &&
(eos != strptime (fancy_time, "%Ec", &tv)) &&
(eos != strptime (fancy_time, "%Y-%m-%d %H:%M:%S", &tv)) &&
(eos != strptime (fancy_time, "%Y-%m-%d %H:%M", &tv)) &&
(eos != strptime (fancy_time, "%x", &tv)) &&
(eos != strptime (fancy_time, "%Ex", &tv)) &&
(eos != strptime (fancy_time, "%Y-%m-%d", &tv)) &&
(eos != strptime (fancy_time, "%Y-%m", &tv)) &&
(eos != strptime (fancy_time, "%Y", &tv)))
return GNUNET_SYSERR;
t = mktime (&tv);
atime->abs_value_us = (uint64_t) ((uint64_t) t * 1000LL * 1000LL);
return GNUNET_OK;
}
/**
* Convert the len characters long character sequence
* given in input that is in the given input charset
* to a string in given output charset.
*
* @param input input string
* @param len number of bytes in @a input
* @param input_charset character set used for @a input
* @param output_charset desired character set for the return value
* @return the converted string (0-terminated),
* if conversion fails, a copy of the orignal
* string is returned.
*/
char *
GNUNET_STRINGS_conv (const char *input,
size_t len,
const char *input_charset,
const char *output_charset)
{
char *ret;
uint8_t *u8_string;
char *encoded_string;
size_t u8_string_length;
size_t encoded_string_length;
u8_string = u8_conv_from_encoding (input_charset,
iconveh_error,
input,
len,
NULL,
NULL,
&u8_string_length);
if (NULL == u8_string)
{
LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_from_encoding");
goto fail;
}
if (0 == strcmp (output_charset, "UTF-8"))
{
ret = GNUNET_malloc (u8_string_length + 1);
GNUNET_memcpy (ret, u8_string, u8_string_length);
ret[u8_string_length] = '\0';
free (u8_string);
return ret;
}
encoded_string = u8_conv_to_encoding (output_charset,
iconveh_error,
u8_string,
u8_string_length,
NULL,
NULL,
&encoded_string_length);
free (u8_string);
if (NULL == encoded_string)
{
LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_to_encoding");
goto fail;
}
ret = GNUNET_malloc (encoded_string_length + 1);
GNUNET_memcpy (ret, encoded_string, encoded_string_length);
ret[encoded_string_length] = '\0';
free (encoded_string);
return ret;
fail:
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Character sets requested were `%s'->`%s'\n"),
"UTF-8",
output_charset);
ret = GNUNET_malloc (len + 1);
GNUNET_memcpy (ret, input, len);
ret[len] = '\0';
return ret;
}
/**
* Convert the len characters long character sequence
* given in input that is in the given charset
* to UTF-8.
*
* @param input the input string (not necessarily 0-terminated)
* @param len the number of bytes in the @a input
* @param charset character set to convert from
* @return the converted string (0-terminated),
* if conversion fails, a copy of the orignal
* string is returned.
*/
char *
GNUNET_STRINGS_to_utf8 (const char *input, size_t len, const char *charset)
{
return GNUNET_STRINGS_conv (input, len, charset, "UTF-8");
}
/**
* Convert the len bytes-long UTF-8 string
* given in input to the given charset.
*
* @param input the input string (not necessarily 0-terminated)
* @param len the number of bytes in the @a input
* @param charset character set to convert to
* @return the converted string (0-terminated),
* if conversion fails, a copy of the orignal
* string is returned.
*/
char *
GNUNET_STRINGS_from_utf8 (const char *input, size_t len, const char *charset)
{
return GNUNET_STRINGS_conv (input, len, "UTF-8", charset);
}
/**
* Convert the utf-8 input string to lowercase.
* Output needs to be allocated appropriately.
*
* @param input input string
* @param output output buffer
*/
void
GNUNET_STRINGS_utf8_tolower (const char *input, char *output)
{
uint8_t *tmp_in;
size_t len;
tmp_in = u8_tolower ((uint8_t *) input,
strlen ((char *) input),
NULL,
UNINORM_NFD,
NULL,
&len);
GNUNET_memcpy (output, tmp_in, len);
output[len] = '\0';
free (tmp_in);
}
/**
* Convert the utf-8 input string to uppercase.
* Output needs to be allocated appropriately.
*
* @param input input string
* @param output output buffer
*/
void
GNUNET_STRINGS_utf8_toupper (const char *input, char *output)
{
uint8_t *tmp_in;
size_t len;
tmp_in = u8_toupper ((uint8_t *) input,
strlen ((char *) input),
NULL,
UNINORM_NFD,
NULL,
&len);
GNUNET_memcpy (output, tmp_in, len);
output[len] = '\0';
free (tmp_in);
}
/**
* Complete filename (a la shell) from abbrevition.
* @param fil the name of the file, may contain ~/ or
* be relative to the current directory
* @returns the full file name,
* NULL is returned on error
*/
char *
GNUNET_STRINGS_filename_expand (const char *fil)
{
char *buffer;
size_t len;
char *fm;
const char *fil_ptr;
if (fil == NULL)
return NULL;
if (fil[0] == DIR_SEPARATOR)
/* absolute path, just copy */
return GNUNET_strdup (fil);
if (fil[0] == '~')
{
fm = getenv ("HOME");
if (fm == NULL)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Failed to expand `$HOME': environment variable `HOME' not set"));
return NULL;
}
fm = GNUNET_strdup (fm);
/* do not copy '~' */
fil_ptr = fil + 1;
/* skip over dir seperator to be consistent */
if (fil_ptr[0] == DIR_SEPARATOR)
fil_ptr++;
}
else
{
/* relative path */
fil_ptr = fil;
len = 512;
fm = NULL;
while (1)
{
buffer = GNUNET_malloc (len);
if (getcwd (buffer, len) != NULL)
{
fm = buffer;
break;
}
if ((errno == ERANGE) && (len < 1024 * 1024 * 4))
{
len *= 2;
GNUNET_free (buffer);
continue;
}
GNUNET_free (buffer);
break;
}
if (fm == NULL)
{
LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "getcwd");
buffer = getenv ("PWD"); /* alternative */
if (buffer != NULL)
fm = GNUNET_strdup (buffer);
}
if (fm == NULL)
fm = GNUNET_strdup ("./"); /* give up */
}
GNUNET_asprintf (&buffer,
"%s%s%s",
fm,
(fm[strlen (fm) - 1] == DIR_SEPARATOR) ? ""
: DIR_SEPARATOR_STR,
fil_ptr);
GNUNET_free (fm);
return buffer;
}
/**
* Give relative time in human-readable fancy format.
* This is one of the very few calls in the entire API that is
* NOT reentrant!
*
* @param delta time in milli seconds
* @param do_round are we allowed to round a bit?
* @return time as human-readable string
*/
const char *
GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative delta,
int do_round)
{
static char buf[128];
const char *unit = _ (/* time unit */ "µs");
uint64_t dval = delta.rel_value_us;
if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == delta.rel_value_us)
return _ ("forever");
if (0 == delta.rel_value_us)
return _ ("0 ms");
if (((GNUNET_YES == do_round) && (dval > 5 * 1000)) || (0 == (dval % 1000)))
{
dval = dval / 1000;
unit = _ (/* time unit */ "ms");
if (((GNUNET_YES == do_round) && (dval > 5 * 1000)) || (0 == (dval % 1000)))
{
dval = dval / 1000;
unit = _ (/* time unit */ "s");
if (((GNUNET_YES == do_round) && (dval > 5 * 60)) || (0 == (dval % 60)))
{
dval = dval / 60;
unit = _ (/* time unit */ "m");
if (((GNUNET_YES == do_round) && (dval > 5 * 60)) || (0 == (dval % 60)))
{
dval = dval / 60;
unit = _ (/* time unit */ "h");
if (((GNUNET_YES == do_round) && (dval > 5 * 24)) ||
(0 == (dval % 24)))
{
dval = dval / 24;
if (1 == dval)
unit = _ (/* time unit */ "day");
else
unit = _ (/* time unit */ "days");
}
}
}
}
}
GNUNET_snprintf (buf, sizeof(buf), "%llu %s", dval, unit);
return buf;
}
/**
* "asctime", except for GNUnet time. Converts a GNUnet internal
* absolute time (which is in UTC) to a string in local time.
* Note that the returned value will be overwritten if this function
* is called again.
*
* @param t the absolute time to convert
* @return timestamp in human-readable form in local time
*/
const char *
GNUNET_STRINGS_absolute_time_to_string (struct GNUNET_TIME_Absolute t)
{
static char buf[255];
time_t tt;
struct tm *tp;
if (t.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
return _ ("end of time");
tt = t.abs_value_us / 1000LL / 1000LL;
tp = localtime (&tt);
/* This is hacky, but i don't know a way to detect libc character encoding.
* Just expect utf8 from glibc these days.
* As for msvcrt, use the wide variant, which always returns utf16
* (otherwise we'd have to detect current codepage or use W32API character
* set conversion routines to convert to UTF8).
*/strftime (buf, sizeof(buf), "%a %b %d %H:%M:%S %Y", tp);
return buf;
}
/**
* "man basename"
* Returns a pointer to a part of filename (allocates nothing)!
*
* @param filename filename to extract basename from
* @return short (base) name of the file (that is, everything following the
* last directory separator in filename. If filename ends with a
* directory separator, the result will be a zero-length string.
* If filename has no directory separators, the result is filename
* itself.
*/
const char *
GNUNET_STRINGS_get_short_name (const char *filename)
{
const char *short_fn = filename;
const char *ss;
while (NULL != (ss = strstr (short_fn, DIR_SEPARATOR_STR)) && (ss[1] != '\0'))
short_fn = 1 + ss;
return short_fn;
}
/**
* Get the decoded value corresponding to a character according to Crockford
* Base32 encoding.
*
* @param a a character
* @return corresponding numeric value
*/
static unsigned int
getValue__ (unsigned char a)
{
unsigned int dec;
switch (a)
{
case 'O':
case 'o':
a = '0';
break;
case 'i':
case 'I':
case 'l':
case 'L':
a = '1';
break;
/* also consider U to be V */
case 'u':
case 'U':
a = 'V';
break;
default:
break;
}
if ((a >= '0') && (a <= '9'))
return a - '0';
if ((a >= 'a') && (a <= 'z'))
a = toupper (a);
/* return (a - 'a' + 10); */
dec = 0;
if ((a >= 'A') && (a <= 'Z'))
{
if ('I' < a)
dec++;
if ('L' < a)
dec++;
if ('O' < a)
dec++;
if ('U' < a)
dec++;
return(a - 'A' + 10 - dec);
}
return -1;
}
/**
* Convert binary data to ASCII encoding using Crockford Base32 encoding.
* Returns a pointer to the byte after the last byte in the string, that
* is where the 0-terminator was placed if there was room.
*
* @param data data to encode
* @param size size of data (in bytes)
* @param out buffer to fill
* @param out_size size of the buffer. Must be large enough to hold
* (size * 8 + 4) / 5 bytes
* @return pointer to the next byte in @a out or NULL on error.
*/
char *
GNUNET_STRINGS_data_to_string (const void *data,
size_t size,
char *out,
size_t out_size)
{
/**
* 32 characters for encoding
*/
static char *encTable__ = "0123456789ABCDEFGHJKMNPQRSTVWXYZ";
unsigned int wpos;
unsigned int rpos;
unsigned int bits;
unsigned int vbit;
const unsigned char *udata;
udata = data;
if (out_size < (size * 8 + 4) / 5)
{
GNUNET_break (0);
return NULL;
}
vbit = 0;
wpos = 0;
rpos = 0;
bits = 0;
while ((rpos < size) || (vbit > 0))
{
if ((rpos < size) && (vbit < 5))
{
bits = (bits << 8) | udata[rpos++]; /* eat 8 more bits */
vbit += 8;
}
if (vbit < 5)
{
bits <<= (5 - vbit); /* zero-padding */
GNUNET_assert (vbit == ((size * 8) % 5));
vbit = 5;
}
if (wpos >= out_size)
{
GNUNET_break (0);
return NULL;
}
out[wpos++] = encTable__[(bits >> (vbit - 5)) & 31];
vbit -= 5;
}
GNUNET_assert (0 == vbit);
if (wpos < out_size)
out[wpos] = '\0';
return &out[wpos];
}
/**
* Return the base32crockford encoding of the given buffer.
*
* The returned string will be freshly allocated, and must be free'd
* with GNUNET_free().
*
* @param buffer with data
* @param size size of the buffer
* @return freshly allocated, null-terminated string
*/
char *
GNUNET_STRINGS_data_to_string_alloc (const void *buf, size_t size)
{
char *str_buf;
size_t len = size * 8;
char *end;
if (len % 5 > 0)
len += 5 - len % 5;
len /= 5;
str_buf = GNUNET_malloc (len + 1);
end = GNUNET_STRINGS_data_to_string (buf, size, str_buf, len);
if (NULL == end)
{
GNUNET_free (str_buf);
return NULL;
}
*end = '\0';
return str_buf;
}
/**
* Convert Crockford Base32hex encoding back to data.
* @a out_size must match exactly the size of the data before it was encoded.
*
* @param enc the encoding
* @param enclen number of characters in @a enc (without 0-terminator, which can be missing)
* @param out location where to store the decoded data
* @param out_size size of the output buffer @a out
* @return #GNUNET_OK on success, #GNUNET_SYSERR if result has the wrong encoding
*/
int
GNUNET_STRINGS_string_to_data (const char *enc,
size_t enclen,
void *out,
size_t out_size)
{
unsigned int rpos;
unsigned int wpos;
unsigned int bits;
unsigned int vbit;
int ret;
int shift;
unsigned char *uout;
unsigned int encoded_len = out_size * 8;
if (0 == enclen)
{
if (0 == out_size)
return GNUNET_OK;
return GNUNET_SYSERR;
}
uout = out;
wpos = out_size;
rpos = enclen;
if ((encoded_len % 5) > 0)
{
vbit = encoded_len % 5; /* padding! */
shift = 5 - vbit;
bits = (ret = getValue__ (enc[--rpos])) >> shift;
}
else
{
vbit = 5;
shift = 0;
bits = (ret = getValue__ (enc[--rpos]));
}
if ((encoded_len + shift) / 5 != enclen)
return GNUNET_SYSERR;
if (-1 == ret)
return GNUNET_SYSERR;
while (wpos > 0)
{
if (0 == rpos)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
bits = ((ret = getValue__ (enc[--rpos])) << vbit) | bits;
if (-1 == ret)
return GNUNET_SYSERR;
vbit += 5;
if (vbit >= 8)
{
uout[--wpos] = (unsigned char) bits;
bits >>= 8;
vbit -= 8;
}
}
if ((0 != rpos) || (0 != vbit))
return GNUNET_SYSERR;
return GNUNET_OK;
}
/**
* Parse a path that might be an URI.
*
* @param path path to parse. Must be NULL-terminated.
* @param scheme_part a pointer to 'char *' where a pointer to a string that
* represents the URI scheme will be stored. Can be NULL. The string is
* allocated by the function, and should be freed by GNUNET_free() when
* it is no longer needed.
* @param path_part a pointer to 'const char *' where a pointer to the path
* part of the URI will be stored. Can be NULL. Points to the same block
* of memory as 'path', and thus must not be freed. Might point to '\0',
* if path part is zero-length.
* @return GNUNET_YES if it's an URI, GNUNET_NO otherwise. If 'path' is not
* an URI, '* scheme_part' and '*path_part' will remain unchanged
* (if they weren't NULL).
*/
int
GNUNET_STRINGS_parse_uri (const char *path,
char **scheme_part,
const char **path_part)
{
size_t len;
size_t i;
int end;
int pp_state = 0;
const char *post_scheme_part = NULL;
len = strlen (path);
for (end = 0, i = 0; ! end && i < len; i++)
{
switch (pp_state)
{
case 0:
if ((path[i] == ':') && (i > 0))
{
pp_state += 1;
continue;
}
if (! (((path[i] >= 'A') && (path[i] <= 'Z') ) ||
((path[i] >= 'a') && (path[i] <= 'z') ) ||
((path[i] >= '0') && (path[i] <= '9') ) || (path[i] == '+') ||
(path[i] == '-') || (path[i] == '.')))
end = 1;
break;
case 1:
case 2:
if (path[i] == '/')
{
pp_state += 1;
continue;
}
end = 1;
break;
case 3:
post_scheme_part = &path[i];
end = 1;
break;
default:
end = 1;
}
}
if (post_scheme_part == NULL)
return GNUNET_NO;
if (scheme_part)
{
*scheme_part = GNUNET_malloc (post_scheme_part - path + 1);
GNUNET_memcpy (*scheme_part, path, post_scheme_part - path);
(*scheme_part)[post_scheme_part - path] = '\0';
}
if (path_part)
*path_part = post_scheme_part;
return GNUNET_YES;
}
/**
* Check whether @a filename is absolute or not, and if it's an URI
*
* @param filename filename to check
* @param can_be_uri #GNUNET_YES to check for being URI, #GNUNET_NO - to
* assume it's not URI
* @param r_is_uri a pointer to an int that is set to #GNUNET_YES if @a filename
* is URI and to #GNUNET_NO otherwise. Can be NULL. If @a can_be_uri is
* not #GNUNET_YES, `* r_is_uri` is set to #GNUNET_NO.
* @param r_uri_scheme a pointer to a char * that is set to a pointer to URI scheme.
* The string is allocated by the function, and should be freed with
* GNUNET_free(). Can be NULL.
* @return #GNUNET_YES if @a filename is absolute, #GNUNET_NO otherwise.
*/
int
GNUNET_STRINGS_path_is_absolute (const char *filename,
int can_be_uri,
int *r_is_uri,
char **r_uri_scheme)
{
const char *post_scheme_path;
int is_uri;
char *uri;
/* consider POSIX paths to be absolute too, even on W32,
* as plibc expansion will fix them for us.
*/
if (filename[0] == '/')
return GNUNET_YES;
if (can_be_uri)
{
is_uri = GNUNET_STRINGS_parse_uri (filename, &uri, &post_scheme_path);
if (r_is_uri)
*r_is_uri = is_uri;
if (is_uri)
{
if (r_uri_scheme)
*r_uri_scheme = uri;
else
GNUNET_free_non_null (uri);
return GNUNET_STRINGS_path_is_absolute (post_scheme_path,
GNUNET_NO,
NULL,
NULL);
}
}
else
{
if (r_is_uri)
*r_is_uri = GNUNET_NO;
}
return GNUNET_NO;
}
/**
* Perform @a checks on @a filename.
*
* @param filename file to check
* @param checks checks to perform
* @return #GNUNET_YES if all checks pass, #GNUNET_NO if at least one of them
* fails, #GNUNET_SYSERR when a check can't be performed
*/
int
GNUNET_STRINGS_check_filename (const char *filename,
enum GNUNET_STRINGS_FilenameCheck checks)
{
struct stat st;
if ((NULL == filename) || (filename[0] == '\0'))
return GNUNET_SYSERR;
if (0 != (checks & GNUNET_STRINGS_CHECK_IS_ABSOLUTE))
if (! GNUNET_STRINGS_path_is_absolute (filename, GNUNET_NO, NULL, NULL))
return GNUNET_NO;
if (0 != (checks
& (GNUNET_STRINGS_CHECK_EXISTS | GNUNET_STRINGS_CHECK_IS_DIRECTORY
| GNUNET_STRINGS_CHECK_IS_LINK)))
{
if (0 != stat (filename, &st))
{
if (0 != (checks & GNUNET_STRINGS_CHECK_EXISTS))
return GNUNET_NO;
else
return GNUNET_SYSERR;
}
}
if (0 != (checks & GNUNET_STRINGS_CHECK_IS_DIRECTORY))
if (! S_ISDIR (st.st_mode))
return GNUNET_NO;
if (0 != (checks & GNUNET_STRINGS_CHECK_IS_LINK))
if (! S_ISLNK (st.st_mode))
return GNUNET_NO;
return GNUNET_YES;
}
/**
* Tries to convert @a zt_addr string to an IPv6 address.
* The string is expected to have the format "[ABCD::01]:80".
*
* @param zt_addr 0-terminated string. May be mangled by the function.
* @param addrlen length of @a zt_addr (not counting 0-terminator).
* @param r_buf a buffer to fill. Initially gets filled with zeroes,
* then its sin6_port, sin6_family and sin6_addr are set appropriately.
* @return #GNUNET_OK if conversion succeded.
* #GNUNET_SYSERR otherwise, in which
* case the contents of @a r_buf are undefined.
*/
int
GNUNET_STRINGS_to_address_ipv6 (const char *zt_addr,
uint16_t addrlen,
struct sockaddr_in6 *r_buf)
{
char zbuf[addrlen + 1];
int ret;
char *port_colon;
unsigned int port;
char dummy[2];
if (addrlen < 6)
return GNUNET_SYSERR;
GNUNET_memcpy (zbuf, zt_addr, addrlen);
if ('[' != zbuf[0])
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("IPv6 address did not start with `['\n"));
return GNUNET_SYSERR;
}
zbuf[addrlen] = '\0';
port_colon = strrchr (zbuf, ':');
if (NULL == port_colon)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("IPv6 address did contain ':' to separate port number\n"));
return GNUNET_SYSERR;
}
if (']' != *(port_colon - 1))
{
GNUNET_log (
GNUNET_ERROR_TYPE_WARNING,
_ ("IPv6 address did contain ']' before ':' to separate port number\n"));
return GNUNET_SYSERR;
}
ret = sscanf (port_colon, ":%u%1s", &port, dummy);
if ((1 != ret) || (port > 65535))
{
GNUNET_log (
GNUNET_ERROR_TYPE_WARNING,
_ ("IPv6 address did contain a valid port number after the last ':'\n"));
return GNUNET_SYSERR;
}
*(port_colon - 1) = '\0';
memset (r_buf, 0, sizeof(struct sockaddr_in6));
ret = inet_pton (AF_INET6, &zbuf[1], &r_buf->sin6_addr);
if (ret <= 0)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid IPv6 address `%s': %s\n"),
&zbuf[1],
strerror (errno));
return GNUNET_SYSERR;
}
r_buf->sin6_port = htons (port);
r_buf->sin6_family = AF_INET6;
#if HAVE_SOCKADDR_IN_SIN_LEN
r_buf->sin6_len = (u_char) sizeof(struct sockaddr_in6);
#endif
return GNUNET_OK;
}
/**
* Tries to convert 'zt_addr' string to an IPv4 address.
* The string is expected to have the format "1.2.3.4:80".
*
* @param zt_addr 0-terminated string. May be mangled by the function.
* @param addrlen length of @a zt_addr (not counting 0-terminator).
* @param r_buf a buffer to fill.
* @return #GNUNET_OK if conversion succeded.
* #GNUNET_SYSERR otherwise, in which case
* the contents of @a r_buf are undefined.
*/
int
GNUNET_STRINGS_to_address_ipv4 (const char *zt_addr,
uint16_t addrlen,
struct sockaddr_in *r_buf)
{
unsigned int temps[4];
unsigned int port;
unsigned int cnt;
char dummy[2];
if (addrlen < 9)
return GNUNET_SYSERR;
cnt = sscanf (zt_addr,
"%u.%u.%u.%u:%u%1s",
&temps[0],
&temps[1],
&temps[2],
&temps[3],
&port,
dummy);
if (5 != cnt)
return GNUNET_SYSERR;
for (cnt = 0; cnt < 4; cnt++)
if (temps[cnt] > 0xFF)
return GNUNET_SYSERR;
if (port > 65535)
return GNUNET_SYSERR;
r_buf->sin_family = AF_INET;
r_buf->sin_port = htons (port);
r_buf->sin_addr.s_addr =
htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) + temps[3]);
#if HAVE_SOCKADDR_IN_SIN_LEN
r_buf->sin_len = (u_char) sizeof(struct sockaddr_in);
#endif
return GNUNET_OK;
}
/**
* Tries to convert @a addr string to an IP (v4 or v6) address.
* Will automatically decide whether to treat 'addr' as v4 or v6 address.
*
* @param addr a string, may not be 0-terminated.
* @param addrlen number of bytes in @a addr (if addr is 0-terminated,
* 0-terminator should not be counted towards addrlen).
* @param r_buf a buffer to fill.
* @return #GNUNET_OK if conversion succeded. #GNUNET_SYSERR otherwise, in which
* case the contents of @a r_buf are undefined.
*/
int
GNUNET_STRINGS_to_address_ip (const char *addr,
uint16_t addrlen,
struct sockaddr_storage *r_buf)
{
if (addr[0] == '[')
return GNUNET_STRINGS_to_address_ipv6 (addr,
addrlen,
(struct sockaddr_in6 *) r_buf);
return GNUNET_STRINGS_to_address_ipv4 (addr,
addrlen,
(struct sockaddr_in *) r_buf);
}
/**
* Parse an address given as a string into a
* `struct sockaddr`.
*
* @param addr the address
* @param[out] af set to the parsed address family (i.e. AF_INET)
* @param[out] sa set to the parsed address
* @return 0 on error, otherwise number of bytes in @a sa
*/
size_t
GNUNET_STRINGS_parse_socket_addr (const char *addr,
uint8_t *af,
struct sockaddr **sa)
{
char *cp = GNUNET_strdup (addr);
*af = AF_UNSPEC;
if ('[' == *addr)
{
/* IPv6 */
*sa = GNUNET_malloc (sizeof(struct sockaddr_in6));
if (GNUNET_OK !=
GNUNET_STRINGS_to_address_ipv6 (cp,
strlen (cp),
(struct sockaddr_in6 *) *sa))
{
GNUNET_free (*sa);
*sa = NULL;
GNUNET_free (cp);
return 0;
}
*af = AF_INET6;
GNUNET_free (cp);
return sizeof(struct sockaddr_in6);
}
else
{
/* IPv4 */
*sa = GNUNET_malloc (sizeof(struct sockaddr_in));
if (GNUNET_OK !=
GNUNET_STRINGS_to_address_ipv4 (cp,
strlen (cp),
(struct sockaddr_in *) *sa))
{
GNUNET_free (*sa);
*sa = NULL;
GNUNET_free (cp);
return 0;
}
*af = AF_INET;
GNUNET_free (cp);
return sizeof(struct sockaddr_in);
}
}
/**
* Makes a copy of argv that consists of a single memory chunk that can be
* freed with a single call to GNUNET_free();
*/
static char *const *
_make_continuous_arg_copy (int argc, char *const *argv)
{
size_t argvsize = 0;
int i;
char **new_argv;
char *p;
for (i = 0; i < argc; i++)
argvsize += strlen (argv[i]) + 1 + sizeof(char *);
new_argv = GNUNET_malloc (argvsize + sizeof(char *));
p = (char *) &new_argv[argc + 1];
for (i = 0; i < argc; i++)
{
new_argv[i] = p;
strcpy (p, argv[i]);
p += strlen (argv[i]) + 1;
}
new_argv[argc] = NULL;
return (char *const *) new_argv;
}
/**
* Returns utf-8 encoded arguments.
* Does nothing (returns a copy of argc and argv) on any platform
* other than W32.
* Returned argv has u8argv[u8argc] == NULL.
* Returned argv is a single memory block, and can be freed with a single
* GNUNET_free() call.
*
* @param argc argc (as given by main())
* @param argv argv (as given by main())
* @param u8argc a location to store new argc in (though it's th same as argc)
* @param u8argv a location to store new argv in
* @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
*/
int
GNUNET_STRINGS_get_utf8_args (int argc,
char *const *argv,
int *u8argc,
char *const **u8argv)
{
char *const *new_argv =
(char *const *) _make_continuous_arg_copy (argc, argv);
*u8argv = new_argv;
*u8argc = argc;
return GNUNET_OK;
}
/**
* Parse the given port policy. The format is
* "[!]SPORT[-DPORT]".
*
* @param port_policy string to parse
* @param pp policy to fill in
* @return #GNUNET_OK on success, #GNUNET_SYSERR if the
* @a port_policy is malformed
*/
static int
parse_port_policy (const char *port_policy,
struct GNUNET_STRINGS_PortPolicy *pp)
{
const char *pos;
int s;
int e;
char eol[2];
pos = port_policy;
if ('!' == *pos)
{
pp->negate_portrange = GNUNET_YES;
pos++;
}
if (2 == sscanf (pos, "%u-%u%1s", &s, &e, eol))
{
if ((0 == s) || (s > 0xFFFF) || (e < s) || (e > 0xFFFF))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _ ("Port not in range\n"));
return GNUNET_SYSERR;
}
pp->start_port = (uint16_t) s;
pp->end_port = (uint16_t) e;
return GNUNET_OK;
}
if (1 == sscanf (pos, "%u%1s", &s, eol))
{
if ((0 == s) || (s > 0xFFFF))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING, _ ("Port not in range\n"));
return GNUNET_SYSERR;
}
pp->start_port = (uint16_t) s;
pp->end_port = (uint16_t) s;
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Malformed port policy `%s'\n"),
port_policy);
return GNUNET_SYSERR;
}
/**
* Parse an IPv4 network policy. The argument specifies a list of
* subnets. The format is
* (network[/netmask][:SPORT[-DPORT]];)* (no whitespace, must
* be terminated with a semicolon). The network must be given in
* dotted-decimal notation. The netmask can be given in CIDR notation
* (/16) or in dotted-decimal (/255.255.0.0).
*
* @param routeListX a string specifying the IPv4 subnets
* @return the converted list, terminated with all zeros;
* NULL if the synatx is flawed
*/
struct GNUNET_STRINGS_IPv4NetworkPolicy *
GNUNET_STRINGS_parse_ipv4_policy (const char *routeListX)
{
unsigned int count;
unsigned int i;
unsigned int j;
unsigned int len;
int cnt;
unsigned int pos;
unsigned int temps[8];
int slash;
struct GNUNET_STRINGS_IPv4NetworkPolicy *result;
int colon;
int end;
char *routeList;
char dummy[2];
if (NULL == routeListX)
return NULL;
len = strlen (routeListX);
if (0 == len)
return NULL;
routeList = GNUNET_strdup (routeListX);
count = 0;
for (i = 0; i < len; i++)
if (routeList[i] == ';')
count++;
result = GNUNET_malloc (sizeof(struct GNUNET_STRINGS_IPv4NetworkPolicy)
* (count + 1));
i = 0;
pos = 0;
while (i < count)
{
for (colon = pos; ':' != routeList[colon]; colon++)
if ((';' == routeList[colon]) || ('\0' == routeList[colon]))
break;
for (end = colon; ';' != routeList[end]; end++)
if ('\0' == routeList[end])
break;
if ('\0' == routeList[end])
break;
routeList[end] = '\0';
if (':' == routeList[colon])
{
routeList[colon] = '\0';
if (GNUNET_OK != parse_port_policy (&routeList[colon + 1], &result[i].pp))
break;
}
cnt = sscanf (&routeList[pos],
"%u.%u.%u.%u/%u.%u.%u.%u%1s",
&temps[0],
&temps[1],
&temps[2],
&temps[3],
&temps[4],
&temps[5],
&temps[6],
&temps[7],
dummy);
if (8 == cnt)
{
for (j = 0; j < 8; j++)
if (temps[j] > 0xFF)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid format for IP: `%s'\n"),
&routeList[pos]);
GNUNET_free (result);
GNUNET_free (routeList);
return NULL;
}
result[i].network.s_addr = htonl ((temps[0] << 24) + (temps[1] << 16)
+ (temps[2] << 8) + temps[3]);
result[i].netmask.s_addr = htonl ((temps[4] << 24) + (temps[5] << 16)
+ (temps[6] << 8) + temps[7]);
pos = end + 1;
i++;
continue;
}
/* try second notation */
cnt = sscanf (&routeList[pos],
"%u.%u.%u.%u/%u%1s",
&temps[0],
&temps[1],
&temps[2],
&temps[3],
&slash,
dummy);
if (5 == cnt)
{
for (j = 0; j < 4; j++)
if (temps[j] > 0xFF)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid format for IP: `%s'\n"),
&routeList[pos]);
GNUNET_free (result);
GNUNET_free (routeList);
return NULL;
}
result[i].network.s_addr = htonl ((temps[0] << 24) + (temps[1] << 16)
+ (temps[2] << 8) + temps[3]);
if ((slash <= 32) && (slash >= 0))
{
result[i].netmask.s_addr = 0;
while (slash > 0)
{
result[i].netmask.s_addr =
(result[i].netmask.s_addr >> 1) + 0x80000000;
slash--;
}
result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
pos = end + 1;
i++;
continue;
}
else
{
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid network notation ('/%d' is not legal in IPv4 CIDR)."),
slash);
GNUNET_free (result);
GNUNET_free (routeList);
return NULL; /* error */
}
}
/* try third notation */
slash = 32;
cnt = sscanf (&routeList[pos],
"%u.%u.%u.%u%1s",
&temps[0],
&temps[1],
&temps[2],
&temps[3],
dummy);
if (4 == cnt)
{
for (j = 0; j < 4; j++)
if (temps[j] > 0xFF)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid format for IP: `%s'\n"),
&routeList[pos]);
GNUNET_free (result);
GNUNET_free (routeList);
return NULL;
}
result[i].network.s_addr = htonl ((temps[0] << 24) + (temps[1] << 16)
+ (temps[2] << 8) + temps[3]);
result[i].netmask.s_addr = 0;
while (slash > 0)
{
result[i].netmask.s_addr = (result[i].netmask.s_addr >> 1) + 0x80000000;
slash--;
}
result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
pos = end + 1;
i++;
continue;
}
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid format for IP: `%s'\n"),
&routeList[pos]);
GNUNET_free (result);
GNUNET_free (routeList);
return NULL; /* error */
}
if (pos < strlen (routeList))
{
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid format: `%s'\n"),
&routeListX[pos]);
GNUNET_free (result);
GNUNET_free (routeList);
return NULL; /* oops */
}
GNUNET_free (routeList);
return result; /* ok */
}
/**
* Parse an IPv6 network policy. The argument specifies a list of
* subnets. The format is (network[/netmask[:SPORT[-DPORT]]];)*
* (no whitespace, must be terminated with a semicolon). The network
* must be given in colon-hex notation. The netmask must be given in
* CIDR notation (/16) or can be omitted to specify a single host.
* Note that the netmask is mandatory if ports are specified.
*
* @param routeListX a string specifying the policy
* @return the converted list, 0-terminated, NULL if the synatx is flawed
*/
struct GNUNET_STRINGS_IPv6NetworkPolicy *
GNUNET_STRINGS_parse_ipv6_policy (const char *routeListX)
{
unsigned int count;
unsigned int i;
unsigned int len;
unsigned int pos;
int start;
int slash;
int ret;
char *routeList;
struct GNUNET_STRINGS_IPv6NetworkPolicy *result;
unsigned int bits;
unsigned int off;
int save;
int colon;
char dummy[2];
if (NULL == routeListX)
return NULL;
len = strlen (routeListX);
if (0 == len)
return NULL;
routeList = GNUNET_strdup (routeListX);
count = 0;
for (i = 0; i < len; i++)
if (';' == routeList[i])
count++;
if (';' != routeList[len - 1])
{
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid network notation (does not end with ';': `%s')\n"),
routeList);
GNUNET_free (routeList);
return NULL;
}
result = GNUNET_malloc (sizeof(struct GNUNET_STRINGS_IPv6NetworkPolicy)
* (count + 1));
i = 0;
pos = 0;
while (i < count)
{
start = pos;
while (';' != routeList[pos])
pos++;
slash = pos;
while ((slash >= start) && (routeList[slash] != '/'))
slash--;
if (slash < start)
{
memset (&result[i].netmask, 0xFF, sizeof(struct in6_addr));
slash = pos;
}
else
{
routeList[pos] = '\0';
for (colon = pos; ':' != routeList[colon]; colon--)
if ('/' == routeList[colon])
break;
if (':' == routeList[colon])
{
routeList[colon] = '\0';
if (GNUNET_OK !=
parse_port_policy (&routeList[colon + 1], &result[i].pp))
{
GNUNET_free (result);
GNUNET_free (routeList);
return NULL;
}
}
ret = inet_pton (AF_INET6, &routeList[slash + 1], &result[i].netmask);
if (ret <= 0)
{
save = errno;
if ((1 != sscanf (&routeList[slash + 1], "%u%1s", &bits, dummy)) ||
(bits > 128))
{
if (0 == ret)
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Wrong format `%s' for netmask\n"),
&routeList[slash + 1]);
else
{
errno = save;
LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "inet_pton");
}
GNUNET_free (result);
GNUNET_free (routeList);
return NULL;
}
off = 0;
while (bits > 8)
{
result[i].netmask.s6_addr[off++] = 0xFF;
bits -= 8;
}
while (bits > 0)
{
result[i].netmask.s6_addr[off] =
(result[i].netmask.s6_addr[off] >> 1) + 0x80;
bits--;
}
}
}
routeList[slash] = '\0';
ret = inet_pton (AF_INET6, &routeList[start], &result[i].network);
if (ret <= 0)
{
if (0 == ret)
LOG (GNUNET_ERROR_TYPE_WARNING,
_ ("Wrong format `%s' for network\n"),
&routeList[slash + 1]);
else
LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "inet_pton");
GNUNET_free (result);
GNUNET_free (routeList);
return NULL;
}
pos++;
i++;
}
GNUNET_free (routeList);
return result;
}
/** ******************** Base64 encoding ***********/
#define FILLCHAR '='
static char *cvt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";
/**
* Encode into Base64.
*
* @param in the data to encode
* @param len the length of the input
* @param output where to write the output (*output should be NULL,
* is allocated)
* @return the size of the output
*/
size_t
GNUNET_STRINGS_base64_encode (const void *in, size_t len, char **output)
{
const char *data = in;
size_t ret;
char *opt;
ret = 0;
opt = GNUNET_malloc (2 + (len * 4 / 3) + 8);
for (size_t i = 0; i < len; ++i)
{
char c;
c = (data[i] >> 2) & 0x3f;
opt[ret++] = cvt[(int) c];
c = (data[i] << 4) & 0x3f;
if (++i < len)
c |= (data[i] >> 4) & 0x0f;
opt[ret++] = cvt[(int) c];
if (i < len)
{
c = (data[i] << 2) & 0x3f;
if (++i < len)
c |= (data[i] >> 6) & 0x03;
opt[ret++] = cvt[(int) c];
}
else
{
++i;
opt[ret++] = FILLCHAR;
}
if (i < len)
{
c = data[i] & 0x3f;
opt[ret++] = cvt[(int) c];
}
else
{
opt[ret++] = FILLCHAR;
}
}
*output = opt;
return ret;
}
/**
* Encode into Base64url. RFC7515
*
* @param in the data to encode
* @param len the length of the input
* @param output where to write the output (*output should be NULL,
* is allocated)
* @return the size of the output
*/
size_t
GNUNET_STRINGS_base64url_encode (const void *in, size_t len, char **output)
{
char *enc;
size_t pos;
GNUNET_STRINGS_base64_encode (in, len, output);
enc = *output;
/* Replace with correct characters for base64url */
pos = 0;
while ('\0' != enc[pos])
{
if ('+' == enc[pos])
enc[pos] = '-';
if ('/' == enc[pos])
enc[pos] = '_';
if ('=' == enc[pos])
{
enc[pos] = '\0';
break;
}
pos++;
}
return strlen (enc);
}
#define cvtfind(a) \
((((a) >= 'A') && ((a) <= 'Z')) \
? (a) - 'A' \
: (((a) >= 'a') && ((a) <= 'z')) \
? (a) - 'a' + 26 \
: (((a) >= '0') && ((a) <= '9')) \
? (a) - '0' + 52 \
: ((a) == '+') ? 62 : ((a) == '/') ? 63 : -1)
/**
* Decode from Base64.
*
* @param data the data to encode
* @param len the length of the input
* @param output where to write the output (*output should be NULL,
* is allocated)
* @return the size of the output
*/
size_t
GNUNET_STRINGS_base64_decode (const char *data, size_t len, void **out)
{
char *output;
size_t ret = 0;
#define CHECK_CRLF \
while (data[i] == '\r' || data[i] == '\n') \
{ \
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK, \
"ignoring CR/LF\n"); \
i++; \
if (i >= len) \
goto END; \
}
output = GNUNET_malloc ((len * 3 / 4) + 8);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"base64_decode decoding len=%d\n",
(int) len);
for (size_t i = 0; i < len; ++i)
{
char c;
char c1;
CHECK_CRLF;
if (FILLCHAR == data[i])
break;
c = (char) cvtfind (data[i]);
++i;
CHECK_CRLF;
c1 = (char) cvtfind (data[i]);
c = (c << 2) | ((c1 >> 4) & 0x3);
output[ret++] = c;
if (++i < len)
{
CHECK_CRLF;
c = data[i];
if (FILLCHAR == c)
break;
c = (char) cvtfind (c);
c1 = ((c1 << 4) & 0xf0) | ((c >> 2) & 0xf);
output[ret++] = c1;
}
if (++i < len)
{
CHECK_CRLF;
c1 = data[i];
if (FILLCHAR == c1)
break;
c1 = (char) cvtfind (c1);
c = ((c << 6) & 0xc0) | c1;
output[ret++] = c;
}
}
END:
*out = output;
return ret;
}
/**
* Decode from Base64url. RFC7515
*
* @param data the data to decode
* @param len the length of the input
* @param output where to write the output (*output should be NULL,
* is allocated)
* @return the size of the output
*/
size_t
GNUNET_STRINGS_base64url_decode (const char *data, size_t len, void **out)
{
char *s;
int padding;
size_t ret;
/* make enough space for padding */
s = GNUNET_malloc (len + 3);
memcpy (s, data, len);
for (int i = 0; i < strlen (s); i++)
{
if (s[i] == '-')
s[i] = '+';
if (s[i] == '_')
s[i] = '/';
}
padding = len % 4;
switch (padding) // Pad with trailing '='s
{
case 0:
break; // No pad chars in this case
case 2:
memcpy (&s[len],
"==",
2);
len += 2;
break; // Two pad chars
case 3:
s[len] = '=';
len++;
break; // One pad char
default:
GNUNET_assert (0);
break;
}
ret = GNUNET_STRINGS_base64_decode (s, len, out);
GNUNET_free (s);
return ret;
}
/* end of strings.c */