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serval-dna/str.c
Jeremy Lakeman 1e70bcaac6 Clean up some more warnings
2016-11-21 10:34:12 +10:30

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/*
Serval string primitives
Copyright (C) 2012-2015 Serval Project Inc.
Copyright (C) 2016 Flinders University
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#define __SERVAL_DNA__STR_INLINE
#include "str.h"
#include "strbuf_helpers.h"
#include <sodium.h>
#include <stdio.h> // for NULL
#include <string.h> // for strlen(), strncmp() etc.
#include <ctype.h>
#include <assert.h>
#include <limits.h> // for UINT8_MAX
const char hexdigit_upper[16] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
const char hexdigit_lower[16] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
char *tohex(char *dstHex, size_t dstStrLen, const unsigned char *srcBinary)
{
char *p;
size_t i;
for (p = dstHex, i = 0; i < dstStrLen; ++i)
*p++ = (i & 1) ? hexdigit_upper[*srcBinary++ & 0xf] : hexdigit_upper[*srcBinary >> 4];
*p = '\0';
return dstHex;
}
size_t fromhex(unsigned char *dstBinary, const char *srcHex, size_t nbinary)
{
if (strn_fromhex(dstBinary, nbinary, srcHex, NULL) == nbinary)
return nbinary;
return -1;
}
int fromhexstr(unsigned char *dstBinary, size_t nbinary, const char *srcHex)
{
const char *p;
if (strn_fromhex(dstBinary, nbinary, srcHex, &p) == nbinary && *p == '\0')
return 0;
return -1;
}
int fromhexstrn(unsigned char *dstBinary, size_t nbinary, const char *srcHex, size_t nHex, const char **afterHex)
{
if (nbinary *2 == nHex && strn_fromhex(dstBinary, nbinary, srcHex, afterHex) == nbinary)
return 0;
return -1;
}
size_t strn_fromhex(unsigned char *dstBinary, ssize_t dstsiz, const char *srcHex, const char **afterHex)
{
unsigned char *dstorig = dstBinary;
unsigned char *dstend = dstBinary + dstsiz;
while (dstsiz == -1 || dstBinary < dstend) {
int high = hexvalue(srcHex[0]);
if (high == -1)
break;
int low = hexvalue(srcHex[1]);
if (low == -1)
break;
if (dstorig != NULL)
*dstBinary = (high << 4) + low;
++dstBinary;
srcHex += 2;
}
if (afterHex)
*afterHex = srcHex;
return dstBinary - dstorig;
}
#define _B64 _SERVAL_CTYPE_0_BASE64
#define _B64U _SERVAL_CTYPE_0_BASE64URL
uint8_t _serval_ctype_0[UINT8_MAX] = {
['A'] = _B64 | _B64U | 0,
['B'] = _B64 | _B64U | 1,
['C'] = _B64 | _B64U | 2,
['D'] = _B64 | _B64U | 3,
['E'] = _B64 | _B64U | 4,
['F'] = _B64 | _B64U | 5,
['G'] = _B64 | _B64U | 6,
['H'] = _B64 | _B64U | 7,
['I'] = _B64 | _B64U | 8,
['J'] = _B64 | _B64U | 9,
['K'] = _B64 | _B64U | 10,
['L'] = _B64 | _B64U | 11,
['M'] = _B64 | _B64U | 12,
['N'] = _B64 | _B64U | 13,
['O'] = _B64 | _B64U | 14,
['P'] = _B64 | _B64U | 15,
['Q'] = _B64 | _B64U | 16,
['R'] = _B64 | _B64U | 17,
['S'] = _B64 | _B64U | 18,
['T'] = _B64 | _B64U | 19,
['U'] = _B64 | _B64U | 20,
['V'] = _B64 | _B64U | 21,
['W'] = _B64 | _B64U | 22,
['X'] = _B64 | _B64U | 23,
['Y'] = _B64 | _B64U | 24,
['Z'] = _B64 | _B64U | 25,
['a'] = _B64 | _B64U | 26,
['b'] = _B64 | _B64U | 27,
['c'] = _B64 | _B64U | 28,
['d'] = _B64 | _B64U | 29,
['e'] = _B64 | _B64U | 30,
['f'] = _B64 | _B64U | 31,
['g'] = _B64 | _B64U | 32,
['h'] = _B64 | _B64U | 33,
['i'] = _B64 | _B64U | 34,
['j'] = _B64 | _B64U | 35,
['k'] = _B64 | _B64U | 36,
['l'] = _B64 | _B64U | 37,
['m'] = _B64 | _B64U | 38,
['n'] = _B64 | _B64U | 39,
['o'] = _B64 | _B64U | 40,
['p'] = _B64 | _B64U | 41,
['q'] = _B64 | _B64U | 42,
['r'] = _B64 | _B64U | 43,
['s'] = _B64 | _B64U | 44,
['t'] = _B64 | _B64U | 45,
['u'] = _B64 | _B64U | 46,
['v'] = _B64 | _B64U | 47,
['w'] = _B64 | _B64U | 48,
['x'] = _B64 | _B64U | 49,
['y'] = _B64 | _B64U | 50,
['z'] = _B64 | _B64U | 51,
['0'] = _B64 | _B64U | 52,
['1'] = _B64 | _B64U | 53,
['2'] = _B64 | _B64U | 54,
['3'] = _B64 | _B64U | 55,
['4'] = _B64 | _B64U | 56,
['5'] = _B64 | _B64U | 57,
['6'] = _B64 | _B64U | 58,
['7'] = _B64 | _B64U | 59,
['8'] = _B64 | _B64U | 60,
['9'] = _B64 | _B64U | 61,
['+'] = _B64 | 62,
['/'] = _B64 | 63,
['-'] = _B64U | 62,
['_'] = _B64U | 63,
};
#define _SEP _SERVAL_CTYPE_1_HTTP_SEPARATOR
#define _URI_SCHEME _SERVAL_CTYPE_1_URI_SCHEME
#define _URI_UNRES _SERVAL_CTYPE_1_URI_UNRESERVED
#define _URI_RES _SERVAL_CTYPE_1_URI_RESERVED
uint8_t _serval_ctype_1[UINT8_MAX] = {
['A'] = _URI_SCHEME | _URI_UNRES | 0xA,
['B'] = _URI_SCHEME | _URI_UNRES | 0xB,
['C'] = _URI_SCHEME | _URI_UNRES | 0xC,
['D'] = _URI_SCHEME | _URI_UNRES | 0xD,
['E'] = _URI_SCHEME | _URI_UNRES | 0xE,
['F'] = _URI_SCHEME | _URI_UNRES | 0xF,
['G'] = _URI_SCHEME | _URI_UNRES,
['H'] = _URI_SCHEME | _URI_UNRES,
['I'] = _URI_SCHEME | _URI_UNRES,
['J'] = _URI_SCHEME | _URI_UNRES,
['K'] = _URI_SCHEME | _URI_UNRES,
['L'] = _URI_SCHEME | _URI_UNRES,
['M'] = _URI_SCHEME | _URI_UNRES,
['N'] = _URI_SCHEME | _URI_UNRES,
['O'] = _URI_SCHEME | _URI_UNRES,
['P'] = _URI_SCHEME | _URI_UNRES,
['Q'] = _URI_SCHEME | _URI_UNRES,
['R'] = _URI_SCHEME | _URI_UNRES,
['S'] = _URI_SCHEME | _URI_UNRES,
['T'] = _URI_SCHEME | _URI_UNRES,
['U'] = _URI_SCHEME | _URI_UNRES,
['V'] = _URI_SCHEME | _URI_UNRES,
['W'] = _URI_SCHEME | _URI_UNRES,
['X'] = _URI_SCHEME | _URI_UNRES,
['Y'] = _URI_SCHEME | _URI_UNRES,
['Z'] = _URI_SCHEME | _URI_UNRES,
['a'] = _URI_SCHEME | _URI_UNRES | 0xa,
['b'] = _URI_SCHEME | _URI_UNRES | 0xb,
['c'] = _URI_SCHEME | _URI_UNRES | 0xc,
['d'] = _URI_SCHEME | _URI_UNRES | 0xd,
['e'] = _URI_SCHEME | _URI_UNRES | 0xe,
['f'] = _URI_SCHEME | _URI_UNRES | 0xf,
['g'] = _URI_SCHEME | _URI_UNRES,
['h'] = _URI_SCHEME | _URI_UNRES,
['i'] = _URI_SCHEME | _URI_UNRES,
['j'] = _URI_SCHEME | _URI_UNRES,
['k'] = _URI_SCHEME | _URI_UNRES,
['l'] = _URI_SCHEME | _URI_UNRES,
['m'] = _URI_SCHEME | _URI_UNRES,
['n'] = _URI_SCHEME | _URI_UNRES,
['o'] = _URI_SCHEME | _URI_UNRES,
['p'] = _URI_SCHEME | _URI_UNRES,
['q'] = _URI_SCHEME | _URI_UNRES,
['r'] = _URI_SCHEME | _URI_UNRES,
['s'] = _URI_SCHEME | _URI_UNRES,
['t'] = _URI_SCHEME | _URI_UNRES,
['u'] = _URI_SCHEME | _URI_UNRES,
['v'] = _URI_SCHEME | _URI_UNRES,
['w'] = _URI_SCHEME | _URI_UNRES,
['x'] = _URI_SCHEME | _URI_UNRES,
['y'] = _URI_SCHEME | _URI_UNRES,
['z'] = _URI_SCHEME | _URI_UNRES,
['0'] = _URI_SCHEME | _URI_UNRES | 0,
['1'] = _URI_SCHEME | _URI_UNRES | 1,
['2'] = _URI_SCHEME | _URI_UNRES | 2,
['3'] = _URI_SCHEME | _URI_UNRES | 3,
['4'] = _URI_SCHEME | _URI_UNRES | 4,
['5'] = _URI_SCHEME | _URI_UNRES | 5,
['6'] = _URI_SCHEME | _URI_UNRES | 6,
['7'] = _URI_SCHEME | _URI_UNRES | 7,
['8'] = _URI_SCHEME | _URI_UNRES | 8,
['9'] = _URI_SCHEME | _URI_UNRES | 9,
['\t'] = _SEP,
[' '] = _SEP,
['_'] = _URI_UNRES,
['='] = _SEP | _URI_RES,
['<'] = _SEP,
['>'] = _SEP,
[';'] = _SEP | _URI_RES,
[':'] = _SEP | _URI_RES,
['\\'] = _SEP,
['\''] = _URI_RES,
['"'] = _SEP,
['/'] = _SEP | _URI_RES,
['['] = _SEP | _URI_RES,
[']'] = _SEP | _URI_RES,
['{'] = _SEP,
['}'] = _SEP,
['('] = _SEP | _URI_RES,
[')'] = _SEP | _URI_RES,
[','] = _SEP | _URI_RES,
['.'] = _URI_SCHEME | _URI_UNRES,
['?'] = _SEP | _URI_RES,
['!'] = _URI_RES,
['+'] = _URI_SCHEME | _URI_RES,
['-'] = _URI_SCHEME | _URI_UNRES,
['*'] = _URI_RES,
['$'] = _URI_RES,
['&'] = _URI_RES,
['#'] = _URI_RES,
['@'] = _SEP | _URI_RES,
['~'] = _URI_UNRES,
};
#define _BND _SERVAL_CTYPE_2_MULTIPART_BOUNDARY
uint8_t _serval_ctype_2[UINT8_MAX] = {
['A'] = _BND,
['B'] = _BND,
['C'] = _BND,
['D'] = _BND,
['E'] = _BND,
['F'] = _BND,
['G'] = _BND,
['H'] = _BND,
['I'] = _BND,
['J'] = _BND,
['K'] = _BND,
['L'] = _BND,
['M'] = _BND,
['N'] = _BND,
['O'] = _BND,
['P'] = _BND,
['Q'] = _BND,
['R'] = _BND,
['S'] = _BND,
['T'] = _BND,
['U'] = _BND,
['V'] = _BND,
['W'] = _BND,
['X'] = _BND,
['Y'] = _BND,
['Z'] = _BND,
['a'] = _BND,
['b'] = _BND,
['c'] = _BND,
['d'] = _BND,
['e'] = _BND,
['f'] = _BND,
['g'] = _BND,
['h'] = _BND,
['i'] = _BND,
['j'] = _BND,
['k'] = _BND,
['l'] = _BND,
['m'] = _BND,
['n'] = _BND,
['o'] = _BND,
['p'] = _BND,
['q'] = _BND,
['r'] = _BND,
['s'] = _BND,
['t'] = _BND,
['u'] = _BND,
['v'] = _BND,
['w'] = _BND,
['x'] = _BND,
['y'] = _BND,
['z'] = _BND,
['0'] = _BND,
['1'] = _BND,
['2'] = _BND,
['3'] = _BND,
['4'] = _BND,
['5'] = _BND,
['6'] = _BND,
['7'] = _BND,
['8'] = _BND,
['9'] = _BND,
['+'] = _BND,
['/'] = _BND,
['='] = _BND,
['-'] = _BND,
['.'] = _BND,
[':'] = _BND,
['_'] = _BND,
['('] = _BND,
[')'] = _BND,
[','] = _BND,
['?'] = _BND,
[' '] = _BND,
};
/* Does this whole buffer contain the same value? */
int is_all_matching(const unsigned char *ptr, size_t len, unsigned char value)
{
while (len--)
if (*ptr++ != value)
return 0;
return 1;
}
char *str_toupper_inplace(char *str)
{
register char *s;
for (s = str; *s; ++s)
*s = toupper(*s);
return str;
}
char *str_tolower_inplace(char *str)
{
register char *s;
for (s = str; *s; ++s)
*s = tolower(*s);
return str;
}
const char *strnchr(const char *s, size_t n, char c)
{
for (; n; --n, ++s) {
if (*s == c)
return s;
if (!*s)
break;
}
return NULL;
}
int str_startswith(const char *str, const char *substring, const char **afterp)
{
while (*substring && *substring == *str)
++substring, ++str;
if (*substring)
return 0;
if (afterp)
*afterp = str;
return 1;
}
int strn_startswith(const char *str, ssize_t len, const char *substring, const char **afterp)
{
// if len == -1 then str must be nul terminated
while (len && *substring && *substring == *str)
--len, ++substring, ++str;
if (*substring)
return 0;
if (afterp)
*afterp = str;
return 1;
}
int strcase_startswith(const char *str, const char *substring, const char **afterp)
{
while (*substring && *str && toupper(*substring) == toupper(*str))
++substring, ++str;
if (*substring)
return 0;
if (afterp)
*afterp = str;
return 1;
}
int strncase_startswith(const char *str, size_t len, const char *substring, const char **afterp)
{
while (len && *substring && toupper(*substring) == toupper(*str))
--len, ++substring, ++str;
if (*substring)
return 0;
if (afterp)
*afterp = str;
return 1;
}
int strn_str_cmp(const char *str1, size_t len1, const char *str2)
{
int r = strncmp(str1, str2, len1);
if (r)
return r;
size_t len2 = strlen(str2);
return len1 < len2 ? -1 : len1 > len2 ? 1 : 0;
}
int strn_str_casecmp(const char *str1, size_t len1, const char *str2)
{
int r = strncasecmp(str1, str2, len1);
if (r)
return r;
size_t len2 = strlen(str2);
return len1 < len2 ? -1 : len1 > len2 ? 1 : 0;
}
int parse_argv(char *cmdline, char delim, char **argv, int max_argv)
{
int argc=0;
if (*cmdline && argc<max_argv){
argv[argc++]=cmdline;
}
// TODO quoted argument handling?
while(*cmdline){
if (*cmdline==delim){
*cmdline=0;
if (cmdline[1] && argc<max_argv)
argv[argc++]=cmdline+1;
}
cmdline++;
}
return argc;
}
/* Like strstr() but doesn't depend on null termination */
char *str_str(char *haystack, const char *needle, size_t haystack_len)
{
size_t needle_len = strlen(needle);
if (needle_len == 0)
return haystack;
if (haystack_len >= needle_len) {
for (; *haystack && haystack_len >= needle_len; ++haystack, --haystack_len)
if (strncmp(haystack, needle, needle_len) == 0)
return haystack;
}
return NULL;
}
/* Compute the length of the string produced by sprintf(fmt, ...).
@author Andrew Bettison <andrew@servalproject.com>
*/
size_t sprintf_len(const char *fmt, ...)
{
strbuf b = strbuf_local(NULL, 0);
va_list ap;
va_start(ap, fmt);
strbuf_vsprintf(b, fmt, ap);
va_end(ap);
return strbuf_count(b);
}
/* Format a buffer of data as a printable representation, eg: "Abc\x0b\n\0", for display
in log messages.
@author Andrew Bettison <andrew@servalproject.com>
*/
char *toprint(char *dstStr, ssize_t dstBufSiz, const char *srcBuf, size_t srcBytes, const char quotes[2])
{
strbuf b = strbuf_local(dstStr, dstBufSiz);
strbuf_toprint_quoted_len(b, quotes, srcBuf, srcBytes);
return dstStr;
}
/* Compute the length of the string produced by toprint().
@author Andrew Bettison <andrew@servalproject.com>
*/
size_t toprint_len(const char *srcBuf, size_t srcBytes, const char quotes[2])
{
return strbuf_count(strbuf_toprint_quoted_len(strbuf_local(NULL, 0), quotes, srcBuf, srcBytes));
}
/* Format a null-terminated string as a printable representation, eg: `Abc\x0b\n`, for display
in log messages. If the given string pointer is NULL, return the string "NULL" without quotes.
@author Andrew Bettison <andrew@servalproject.com>
*/
char *toprint_str(char *dstStr, ssize_t dstBufSiz, const char *srcStr, const char quotes[2])
{
strbuf b = strbuf_local(dstStr, dstBufSiz);
if (srcStr)
strbuf_toprint_quoted(b, quotes, srcStr);
else
strbuf_puts(b, "NULL");
return dstStr;
}
/* Compute the length of the string produced by toprint_str(), excluding the terminating nul.
@author Andrew Bettison <andrew@servalproject.com>
*/
size_t toprint_str_len(const char *srcStr, const char quotes[2])
{
return srcStr ? strbuf_count(strbuf_toprint_quoted(strbuf_local(NULL, 0), quotes, srcStr)) : 4;
}
size_t strn_fromprint(char *dst, size_t dstsiz, const char *src, size_t srclen, char endquote, const char **afterp)
{
char *const odst = dst;
char *const edst = dst + dstsiz;
const char *const esrc = srclen ? src + srclen : NULL;
while ((src < esrc || !esrc) && *src && *src != endquote && dst < edst) {
switch (*src) {
case '\\':
++src;
unsigned char d;
switch (*src) {
case '\0': d = '\\'; break;
case '0': d = '\0'; ++src; break;
case 'n': d = '\n'; ++src; break;
case 'r': d = '\r'; ++src; break;
case 't': d = '\t'; ++src; break;
case 'x':
if (isxdigit(src[1]) && isxdigit(src[2])) {
++src;
fromhex(&d, src, 1);
src += 2;
break;
}
// fall through
default:
d = *src++;
break;
}
*dst++ = d;
break;
default:
*dst++ = *src++;
break;
}
}
if (afterp)
*afterp = src;
return dst - odst;
}
void str_digest_passphrase(unsigned char *dstBinary, size_t dstsiz, const char *passphrase)
{
strn_digest_passphrase(dstBinary, dstsiz, passphrase, strlen(passphrase));
}
void strn_digest_passphrase(unsigned char *dstBinary, size_t dstsiz, const char *passphrase, size_t passlen)
{
assert(dstsiz <= SERVAL_PASSPHRASE_DIGEST_MAX_BINARY);
crypto_hash_sha512_state context;
static const char salt1[] = "Sago pudding";
static const char salt2[] = "Rhubarb pie";
crypto_hash_sha512_init(&context);
crypto_hash_sha512_update(&context, (unsigned char *)salt1, sizeof salt1 - 1);
crypto_hash_sha512_update(&context, (unsigned char *)passphrase, passlen);
crypto_hash_sha512_update(&context, (unsigned char *)salt2, sizeof salt2 - 1);
unsigned char hash[crypto_hash_sha512_BYTES];
crypto_hash_sha512_final(&context, hash);
bcopy(hash, dstBinary, dstsiz);
}
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