109a3aaf3SDag-Erling Smørgrav /*
209a3aaf3SDag-Erling Smørgrav * parseutil.c - parse utilities for string and wire conversion
309a3aaf3SDag-Erling Smørgrav *
409a3aaf3SDag-Erling Smørgrav * (c) NLnet Labs, 2004-2006
509a3aaf3SDag-Erling Smørgrav *
609a3aaf3SDag-Erling Smørgrav * See the file LICENSE for the license
709a3aaf3SDag-Erling Smørgrav */
809a3aaf3SDag-Erling Smørgrav /**
909a3aaf3SDag-Erling Smørgrav * \file
1009a3aaf3SDag-Erling Smørgrav *
1109a3aaf3SDag-Erling Smørgrav * Utility functions for parsing, base32(DNS variant) and base64 encoding
1209a3aaf3SDag-Erling Smørgrav * and decoding, Hex, Time units, Escape codes.
1309a3aaf3SDag-Erling Smørgrav */
1409a3aaf3SDag-Erling Smørgrav
1509a3aaf3SDag-Erling Smørgrav #include "config.h"
1609a3aaf3SDag-Erling Smørgrav #include "sldns/parseutil.h"
1709a3aaf3SDag-Erling Smørgrav #include <sys/time.h>
1809a3aaf3SDag-Erling Smørgrav #include <time.h>
1909a3aaf3SDag-Erling Smørgrav #include <ctype.h>
2009a3aaf3SDag-Erling Smørgrav
2109a3aaf3SDag-Erling Smørgrav sldns_lookup_table *
sldns_lookup_by_name(sldns_lookup_table * table,const char * name)2209a3aaf3SDag-Erling Smørgrav sldns_lookup_by_name(sldns_lookup_table *table, const char *name)
2309a3aaf3SDag-Erling Smørgrav {
2409a3aaf3SDag-Erling Smørgrav while (table->name != NULL) {
2509a3aaf3SDag-Erling Smørgrav if (strcasecmp(name, table->name) == 0)
2609a3aaf3SDag-Erling Smørgrav return table;
2709a3aaf3SDag-Erling Smørgrav table++;
2809a3aaf3SDag-Erling Smørgrav }
2909a3aaf3SDag-Erling Smørgrav return NULL;
3009a3aaf3SDag-Erling Smørgrav }
3109a3aaf3SDag-Erling Smørgrav
3209a3aaf3SDag-Erling Smørgrav sldns_lookup_table *
sldns_lookup_by_id(sldns_lookup_table * table,int id)3309a3aaf3SDag-Erling Smørgrav sldns_lookup_by_id(sldns_lookup_table *table, int id)
3409a3aaf3SDag-Erling Smørgrav {
3509a3aaf3SDag-Erling Smørgrav while (table->name != NULL) {
3609a3aaf3SDag-Erling Smørgrav if (table->id == id)
3709a3aaf3SDag-Erling Smørgrav return table;
3809a3aaf3SDag-Erling Smørgrav table++;
3909a3aaf3SDag-Erling Smørgrav }
4009a3aaf3SDag-Erling Smørgrav return NULL;
4109a3aaf3SDag-Erling Smørgrav }
4209a3aaf3SDag-Erling Smørgrav
4309a3aaf3SDag-Erling Smørgrav /* Number of days per month (except for February in leap years). */
4409a3aaf3SDag-Erling Smørgrav static const int mdays[] = {
4509a3aaf3SDag-Erling Smørgrav 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
4609a3aaf3SDag-Erling Smørgrav };
4709a3aaf3SDag-Erling Smørgrav
4809a3aaf3SDag-Erling Smørgrav #define LDNS_MOD(x,y) (((x) % (y) < 0) ? ((x) % (y) + (y)) : ((x) % (y)))
4909a3aaf3SDag-Erling Smørgrav #define LDNS_DIV(x,y) (((x) % (y) < 0) ? ((x) / (y) - 1 ) : ((x) / (y)))
5009a3aaf3SDag-Erling Smørgrav
5109a3aaf3SDag-Erling Smørgrav static int
is_leap_year(int year)5209a3aaf3SDag-Erling Smørgrav is_leap_year(int year)
5309a3aaf3SDag-Erling Smørgrav {
5409a3aaf3SDag-Erling Smørgrav return LDNS_MOD(year, 4) == 0 && (LDNS_MOD(year, 100) != 0
5509a3aaf3SDag-Erling Smørgrav || LDNS_MOD(year, 400) == 0);
5609a3aaf3SDag-Erling Smørgrav }
5709a3aaf3SDag-Erling Smørgrav
5809a3aaf3SDag-Erling Smørgrav static int
leap_days(int y1,int y2)5909a3aaf3SDag-Erling Smørgrav leap_days(int y1, int y2)
6009a3aaf3SDag-Erling Smørgrav {
6109a3aaf3SDag-Erling Smørgrav --y1;
6209a3aaf3SDag-Erling Smørgrav --y2;
6309a3aaf3SDag-Erling Smørgrav return (LDNS_DIV(y2, 4) - LDNS_DIV(y1, 4)) -
6409a3aaf3SDag-Erling Smørgrav (LDNS_DIV(y2, 100) - LDNS_DIV(y1, 100)) +
6509a3aaf3SDag-Erling Smørgrav (LDNS_DIV(y2, 400) - LDNS_DIV(y1, 400));
6609a3aaf3SDag-Erling Smørgrav }
6709a3aaf3SDag-Erling Smørgrav
6809a3aaf3SDag-Erling Smørgrav /*
6909a3aaf3SDag-Erling Smørgrav * Code adapted from Python 2.4.1 sources (Lib/calendar.py).
7009a3aaf3SDag-Erling Smørgrav */
7109a3aaf3SDag-Erling Smørgrav time_t
sldns_mktime_from_utc(const struct tm * tm)7209a3aaf3SDag-Erling Smørgrav sldns_mktime_from_utc(const struct tm *tm)
7309a3aaf3SDag-Erling Smørgrav {
7409a3aaf3SDag-Erling Smørgrav int year = 1900 + tm->tm_year;
7509a3aaf3SDag-Erling Smørgrav time_t days = 365 * ((time_t) year - 1970) + leap_days(1970, year);
7609a3aaf3SDag-Erling Smørgrav time_t hours;
7709a3aaf3SDag-Erling Smørgrav time_t minutes;
7809a3aaf3SDag-Erling Smørgrav time_t seconds;
7909a3aaf3SDag-Erling Smørgrav int i;
8009a3aaf3SDag-Erling Smørgrav
8109a3aaf3SDag-Erling Smørgrav for (i = 0; i < tm->tm_mon; ++i) {
8209a3aaf3SDag-Erling Smørgrav days += mdays[i];
8309a3aaf3SDag-Erling Smørgrav }
8409a3aaf3SDag-Erling Smørgrav if (tm->tm_mon > 1 && is_leap_year(year)) {
8509a3aaf3SDag-Erling Smørgrav ++days;
8609a3aaf3SDag-Erling Smørgrav }
8709a3aaf3SDag-Erling Smørgrav days += tm->tm_mday - 1;
8809a3aaf3SDag-Erling Smørgrav
8909a3aaf3SDag-Erling Smørgrav hours = days * 24 + tm->tm_hour;
9009a3aaf3SDag-Erling Smørgrav minutes = hours * 60 + tm->tm_min;
9109a3aaf3SDag-Erling Smørgrav seconds = minutes * 60 + tm->tm_sec;
9209a3aaf3SDag-Erling Smørgrav
9309a3aaf3SDag-Erling Smørgrav return seconds;
9409a3aaf3SDag-Erling Smørgrav }
9509a3aaf3SDag-Erling Smørgrav
9609a3aaf3SDag-Erling Smørgrav #if SIZEOF_TIME_T <= 4
9709a3aaf3SDag-Erling Smørgrav
9809a3aaf3SDag-Erling Smørgrav static void
sldns_year_and_yday_from_days_since_epoch(int64_t days,struct tm * result)9909a3aaf3SDag-Erling Smørgrav sldns_year_and_yday_from_days_since_epoch(int64_t days, struct tm *result)
10009a3aaf3SDag-Erling Smørgrav {
10109a3aaf3SDag-Erling Smørgrav int year = 1970;
10209a3aaf3SDag-Erling Smørgrav int new_year;
10309a3aaf3SDag-Erling Smørgrav
10409a3aaf3SDag-Erling Smørgrav while (days < 0 || days >= (int64_t) (is_leap_year(year) ? 366 : 365)) {
10509a3aaf3SDag-Erling Smørgrav new_year = year + (int) LDNS_DIV(days, 365);
10609a3aaf3SDag-Erling Smørgrav days -= (new_year - year) * 365;
10709a3aaf3SDag-Erling Smørgrav days -= leap_days(year, new_year);
10809a3aaf3SDag-Erling Smørgrav year = new_year;
10909a3aaf3SDag-Erling Smørgrav }
11009a3aaf3SDag-Erling Smørgrav result->tm_year = year;
11109a3aaf3SDag-Erling Smørgrav result->tm_yday = (int) days;
11209a3aaf3SDag-Erling Smørgrav }
11309a3aaf3SDag-Erling Smørgrav
11409a3aaf3SDag-Erling Smørgrav /* Number of days per month in a leap year. */
11509a3aaf3SDag-Erling Smørgrav static const int leap_year_mdays[] = {
11609a3aaf3SDag-Erling Smørgrav 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
11709a3aaf3SDag-Erling Smørgrav };
11809a3aaf3SDag-Erling Smørgrav
11909a3aaf3SDag-Erling Smørgrav static void
sldns_mon_and_mday_from_year_and_yday(struct tm * result)12009a3aaf3SDag-Erling Smørgrav sldns_mon_and_mday_from_year_and_yday(struct tm *result)
12109a3aaf3SDag-Erling Smørgrav {
12209a3aaf3SDag-Erling Smørgrav int idays = result->tm_yday;
12309a3aaf3SDag-Erling Smørgrav const int *mon_lengths = is_leap_year(result->tm_year) ?
12409a3aaf3SDag-Erling Smørgrav leap_year_mdays : mdays;
12509a3aaf3SDag-Erling Smørgrav
12609a3aaf3SDag-Erling Smørgrav result->tm_mon = 0;
12709a3aaf3SDag-Erling Smørgrav while (idays >= mon_lengths[result->tm_mon]) {
12809a3aaf3SDag-Erling Smørgrav idays -= mon_lengths[result->tm_mon++];
12909a3aaf3SDag-Erling Smørgrav }
13009a3aaf3SDag-Erling Smørgrav result->tm_mday = idays + 1;
13109a3aaf3SDag-Erling Smørgrav }
13209a3aaf3SDag-Erling Smørgrav
13309a3aaf3SDag-Erling Smørgrav static void
sldns_wday_from_year_and_yday(struct tm * result)13409a3aaf3SDag-Erling Smørgrav sldns_wday_from_year_and_yday(struct tm *result)
13509a3aaf3SDag-Erling Smørgrav {
13609a3aaf3SDag-Erling Smørgrav result->tm_wday = 4 /* 1-1-1970 was a thursday */
13709a3aaf3SDag-Erling Smørgrav + LDNS_MOD((result->tm_year - 1970), 7) * LDNS_MOD(365, 7)
13809a3aaf3SDag-Erling Smørgrav + leap_days(1970, result->tm_year)
13909a3aaf3SDag-Erling Smørgrav + result->tm_yday;
14009a3aaf3SDag-Erling Smørgrav result->tm_wday = LDNS_MOD(result->tm_wday, 7);
14109a3aaf3SDag-Erling Smørgrav if (result->tm_wday < 0) {
14209a3aaf3SDag-Erling Smørgrav result->tm_wday += 7;
14309a3aaf3SDag-Erling Smørgrav }
14409a3aaf3SDag-Erling Smørgrav }
14509a3aaf3SDag-Erling Smørgrav
14609a3aaf3SDag-Erling Smørgrav static struct tm *
sldns_gmtime64_r(int64_t clock,struct tm * result)14709a3aaf3SDag-Erling Smørgrav sldns_gmtime64_r(int64_t clock, struct tm *result)
14809a3aaf3SDag-Erling Smørgrav {
14909a3aaf3SDag-Erling Smørgrav result->tm_isdst = 0;
15009a3aaf3SDag-Erling Smørgrav result->tm_sec = (int) LDNS_MOD(clock, 60);
15109a3aaf3SDag-Erling Smørgrav clock = LDNS_DIV(clock, 60);
15209a3aaf3SDag-Erling Smørgrav result->tm_min = (int) LDNS_MOD(clock, 60);
15309a3aaf3SDag-Erling Smørgrav clock = LDNS_DIV(clock, 60);
15409a3aaf3SDag-Erling Smørgrav result->tm_hour = (int) LDNS_MOD(clock, 24);
15509a3aaf3SDag-Erling Smørgrav clock = LDNS_DIV(clock, 24);
15609a3aaf3SDag-Erling Smørgrav
15709a3aaf3SDag-Erling Smørgrav sldns_year_and_yday_from_days_since_epoch(clock, result);
15809a3aaf3SDag-Erling Smørgrav sldns_mon_and_mday_from_year_and_yday(result);
15909a3aaf3SDag-Erling Smørgrav sldns_wday_from_year_and_yday(result);
16009a3aaf3SDag-Erling Smørgrav result->tm_year -= 1900;
16109a3aaf3SDag-Erling Smørgrav
16209a3aaf3SDag-Erling Smørgrav return result;
16309a3aaf3SDag-Erling Smørgrav }
16409a3aaf3SDag-Erling Smørgrav
16509a3aaf3SDag-Erling Smørgrav #endif /* SIZEOF_TIME_T <= 4 */
16609a3aaf3SDag-Erling Smørgrav
16709a3aaf3SDag-Erling Smørgrav static int64_t
sldns_serial_arithmetics_time(int32_t time,time_t now)1688a384985SDag-Erling Smørgrav sldns_serial_arithmetics_time(int32_t time, time_t now)
16909a3aaf3SDag-Erling Smørgrav {
17025039b37SCy Schubert int32_t offset = (int32_t)((uint32_t) time - (uint32_t) now);
17109a3aaf3SDag-Erling Smørgrav return (int64_t) now + offset;
17209a3aaf3SDag-Erling Smørgrav }
17309a3aaf3SDag-Erling Smørgrav
17409a3aaf3SDag-Erling Smørgrav struct tm *
sldns_serial_arithmetics_gmtime_r(int32_t time,time_t now,struct tm * result)1758a384985SDag-Erling Smørgrav sldns_serial_arithmetics_gmtime_r(int32_t time, time_t now, struct tm *result)
17609a3aaf3SDag-Erling Smørgrav {
17709a3aaf3SDag-Erling Smørgrav #if SIZEOF_TIME_T <= 4
1788a384985SDag-Erling Smørgrav int64_t secs_since_epoch = sldns_serial_arithmetics_time(time, now);
17909a3aaf3SDag-Erling Smørgrav return sldns_gmtime64_r(secs_since_epoch, result);
18009a3aaf3SDag-Erling Smørgrav #else
1818a384985SDag-Erling Smørgrav time_t secs_since_epoch = sldns_serial_arithmetics_time(time, now);
18209a3aaf3SDag-Erling Smørgrav return gmtime_r(&secs_since_epoch, result);
18309a3aaf3SDag-Erling Smørgrav #endif
18409a3aaf3SDag-Erling Smørgrav }
18509a3aaf3SDag-Erling Smørgrav
18609a3aaf3SDag-Erling Smørgrav int
sldns_hexdigit_to_int(char ch)18709a3aaf3SDag-Erling Smørgrav sldns_hexdigit_to_int(char ch)
18809a3aaf3SDag-Erling Smørgrav {
18909a3aaf3SDag-Erling Smørgrav switch (ch) {
19009a3aaf3SDag-Erling Smørgrav case '0': return 0;
19109a3aaf3SDag-Erling Smørgrav case '1': return 1;
19209a3aaf3SDag-Erling Smørgrav case '2': return 2;
19309a3aaf3SDag-Erling Smørgrav case '3': return 3;
19409a3aaf3SDag-Erling Smørgrav case '4': return 4;
19509a3aaf3SDag-Erling Smørgrav case '5': return 5;
19609a3aaf3SDag-Erling Smørgrav case '6': return 6;
19709a3aaf3SDag-Erling Smørgrav case '7': return 7;
19809a3aaf3SDag-Erling Smørgrav case '8': return 8;
19909a3aaf3SDag-Erling Smørgrav case '9': return 9;
20009a3aaf3SDag-Erling Smørgrav case 'a': case 'A': return 10;
20109a3aaf3SDag-Erling Smørgrav case 'b': case 'B': return 11;
20209a3aaf3SDag-Erling Smørgrav case 'c': case 'C': return 12;
20309a3aaf3SDag-Erling Smørgrav case 'd': case 'D': return 13;
20409a3aaf3SDag-Erling Smørgrav case 'e': case 'E': return 14;
20509a3aaf3SDag-Erling Smørgrav case 'f': case 'F': return 15;
20609a3aaf3SDag-Erling Smørgrav default:
20709a3aaf3SDag-Erling Smørgrav return -1;
20809a3aaf3SDag-Erling Smørgrav }
20909a3aaf3SDag-Erling Smørgrav }
21009a3aaf3SDag-Erling Smørgrav
21109a3aaf3SDag-Erling Smørgrav uint32_t
sldns_str2period(const char * nptr,const char ** endptr,int * overflow)212*a39a5a69SCy Schubert sldns_str2period(const char *nptr, const char **endptr, int* overflow)
21309a3aaf3SDag-Erling Smørgrav {
21409a3aaf3SDag-Erling Smørgrav int sign = 0;
21509a3aaf3SDag-Erling Smørgrav uint32_t i = 0;
21609a3aaf3SDag-Erling Smørgrav uint32_t seconds = 0;
217*a39a5a69SCy Schubert const uint32_t maxint = 0xffffffff;
218*a39a5a69SCy Schubert *overflow = 0;
21909a3aaf3SDag-Erling Smørgrav
22009a3aaf3SDag-Erling Smørgrav for(*endptr = nptr; **endptr; (*endptr)++) {
22109a3aaf3SDag-Erling Smørgrav switch (**endptr) {
22209a3aaf3SDag-Erling Smørgrav case ' ':
22309a3aaf3SDag-Erling Smørgrav case '\t':
22409a3aaf3SDag-Erling Smørgrav break;
22509a3aaf3SDag-Erling Smørgrav case '-':
22609a3aaf3SDag-Erling Smørgrav if(sign == 0) {
22709a3aaf3SDag-Erling Smørgrav sign = -1;
22809a3aaf3SDag-Erling Smørgrav } else {
22909a3aaf3SDag-Erling Smørgrav return seconds;
23009a3aaf3SDag-Erling Smørgrav }
23109a3aaf3SDag-Erling Smørgrav break;
23209a3aaf3SDag-Erling Smørgrav case '+':
23309a3aaf3SDag-Erling Smørgrav if(sign == 0) {
23409a3aaf3SDag-Erling Smørgrav sign = 1;
23509a3aaf3SDag-Erling Smørgrav } else {
23609a3aaf3SDag-Erling Smørgrav return seconds;
23709a3aaf3SDag-Erling Smørgrav }
23809a3aaf3SDag-Erling Smørgrav break;
23909a3aaf3SDag-Erling Smørgrav case 's':
24009a3aaf3SDag-Erling Smørgrav case 'S':
241*a39a5a69SCy Schubert if(seconds > maxint-i) {
242*a39a5a69SCy Schubert *overflow = 1;
243*a39a5a69SCy Schubert return 0;
244*a39a5a69SCy Schubert }
24509a3aaf3SDag-Erling Smørgrav seconds += i;
24609a3aaf3SDag-Erling Smørgrav i = 0;
24709a3aaf3SDag-Erling Smørgrav break;
24809a3aaf3SDag-Erling Smørgrav case 'm':
24909a3aaf3SDag-Erling Smørgrav case 'M':
250*a39a5a69SCy Schubert if(i > maxint/60 || seconds > maxint-(i*60)) {
251*a39a5a69SCy Schubert *overflow = 1;
252*a39a5a69SCy Schubert return 0;
253*a39a5a69SCy Schubert }
25409a3aaf3SDag-Erling Smørgrav seconds += i * 60;
25509a3aaf3SDag-Erling Smørgrav i = 0;
25609a3aaf3SDag-Erling Smørgrav break;
25709a3aaf3SDag-Erling Smørgrav case 'h':
25809a3aaf3SDag-Erling Smørgrav case 'H':
259*a39a5a69SCy Schubert if(i > maxint/(60*60) || seconds > maxint-(i*60*60)) {
260*a39a5a69SCy Schubert *overflow = 1;
261*a39a5a69SCy Schubert return 0;
262*a39a5a69SCy Schubert }
26309a3aaf3SDag-Erling Smørgrav seconds += i * 60 * 60;
26409a3aaf3SDag-Erling Smørgrav i = 0;
26509a3aaf3SDag-Erling Smørgrav break;
26609a3aaf3SDag-Erling Smørgrav case 'd':
26709a3aaf3SDag-Erling Smørgrav case 'D':
268*a39a5a69SCy Schubert if(i > maxint/(60*60*24) || seconds > maxint-(i*60*60*24)) {
269*a39a5a69SCy Schubert *overflow = 1;
270*a39a5a69SCy Schubert return 0;
271*a39a5a69SCy Schubert }
27209a3aaf3SDag-Erling Smørgrav seconds += i * 60 * 60 * 24;
27309a3aaf3SDag-Erling Smørgrav i = 0;
27409a3aaf3SDag-Erling Smørgrav break;
27509a3aaf3SDag-Erling Smørgrav case 'w':
27609a3aaf3SDag-Erling Smørgrav case 'W':
277*a39a5a69SCy Schubert if(i > maxint/(60*60*24*7) || seconds > maxint-(i*60*60*24*7)) {
278*a39a5a69SCy Schubert *overflow = 1;
279*a39a5a69SCy Schubert return 0;
280*a39a5a69SCy Schubert }
28109a3aaf3SDag-Erling Smørgrav seconds += i * 60 * 60 * 24 * 7;
28209a3aaf3SDag-Erling Smørgrav i = 0;
28309a3aaf3SDag-Erling Smørgrav break;
28409a3aaf3SDag-Erling Smørgrav case '0':
28509a3aaf3SDag-Erling Smørgrav case '1':
28609a3aaf3SDag-Erling Smørgrav case '2':
28709a3aaf3SDag-Erling Smørgrav case '3':
28809a3aaf3SDag-Erling Smørgrav case '4':
28909a3aaf3SDag-Erling Smørgrav case '5':
29009a3aaf3SDag-Erling Smørgrav case '6':
29109a3aaf3SDag-Erling Smørgrav case '7':
29209a3aaf3SDag-Erling Smørgrav case '8':
29309a3aaf3SDag-Erling Smørgrav case '9':
294*a39a5a69SCy Schubert if(i > maxint/10 || i*10 > maxint - (**endptr - '0')) {
295*a39a5a69SCy Schubert *overflow = 1;
296*a39a5a69SCy Schubert return 0;
297*a39a5a69SCy Schubert }
29809a3aaf3SDag-Erling Smørgrav i *= 10;
29909a3aaf3SDag-Erling Smørgrav i += (**endptr - '0');
30009a3aaf3SDag-Erling Smørgrav break;
30109a3aaf3SDag-Erling Smørgrav default:
302*a39a5a69SCy Schubert if(seconds > maxint-i) {
303*a39a5a69SCy Schubert *overflow = 1;
304*a39a5a69SCy Schubert return 0;
305*a39a5a69SCy Schubert }
30609a3aaf3SDag-Erling Smørgrav seconds += i;
30709a3aaf3SDag-Erling Smørgrav /* disregard signedness */
30809a3aaf3SDag-Erling Smørgrav return seconds;
30909a3aaf3SDag-Erling Smørgrav }
31009a3aaf3SDag-Erling Smørgrav }
311*a39a5a69SCy Schubert if(seconds > maxint-i) {
312*a39a5a69SCy Schubert *overflow = 1;
313*a39a5a69SCy Schubert return 0;
314*a39a5a69SCy Schubert }
31509a3aaf3SDag-Erling Smørgrav seconds += i;
31609a3aaf3SDag-Erling Smørgrav /* disregard signedness */
31709a3aaf3SDag-Erling Smørgrav return seconds;
31809a3aaf3SDag-Erling Smørgrav }
31909a3aaf3SDag-Erling Smørgrav
32009a3aaf3SDag-Erling Smørgrav int
sldns_parse_escape(uint8_t * ch_p,const char ** str_p)32109a3aaf3SDag-Erling Smørgrav sldns_parse_escape(uint8_t *ch_p, const char** str_p)
32209a3aaf3SDag-Erling Smørgrav {
32309a3aaf3SDag-Erling Smørgrav uint16_t val;
32409a3aaf3SDag-Erling Smørgrav
32509a3aaf3SDag-Erling Smørgrav if ((*str_p)[0] && isdigit((unsigned char)(*str_p)[0]) &&
32609a3aaf3SDag-Erling Smørgrav (*str_p)[1] && isdigit((unsigned char)(*str_p)[1]) &&
32709a3aaf3SDag-Erling Smørgrav (*str_p)[2] && isdigit((unsigned char)(*str_p)[2])) {
32809a3aaf3SDag-Erling Smørgrav
32909a3aaf3SDag-Erling Smørgrav val = (uint16_t)(((*str_p)[0] - '0') * 100 +
33009a3aaf3SDag-Erling Smørgrav ((*str_p)[1] - '0') * 10 +
33109a3aaf3SDag-Erling Smørgrav ((*str_p)[2] - '0'));
33209a3aaf3SDag-Erling Smørgrav
33309a3aaf3SDag-Erling Smørgrav if (val > 255) {
33409a3aaf3SDag-Erling Smørgrav goto error;
33509a3aaf3SDag-Erling Smørgrav }
33609a3aaf3SDag-Erling Smørgrav *ch_p = (uint8_t)val;
33709a3aaf3SDag-Erling Smørgrav *str_p += 3;
33809a3aaf3SDag-Erling Smørgrav return 1;
33909a3aaf3SDag-Erling Smørgrav
34009a3aaf3SDag-Erling Smørgrav } else if ((*str_p)[0] && !isdigit((unsigned char)(*str_p)[0])) {
34109a3aaf3SDag-Erling Smørgrav
34209a3aaf3SDag-Erling Smørgrav *ch_p = (uint8_t)*(*str_p)++;
34309a3aaf3SDag-Erling Smørgrav return 1;
34409a3aaf3SDag-Erling Smørgrav }
34509a3aaf3SDag-Erling Smørgrav error:
34609a3aaf3SDag-Erling Smørgrav *str_p = NULL;
34709a3aaf3SDag-Erling Smørgrav return 0; /* LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE */
34809a3aaf3SDag-Erling Smørgrav }
34909a3aaf3SDag-Erling Smørgrav
35009a3aaf3SDag-Erling Smørgrav /** parse one character, with escape codes */
35109a3aaf3SDag-Erling Smørgrav int
sldns_parse_char(uint8_t * ch_p,const char ** str_p)35209a3aaf3SDag-Erling Smørgrav sldns_parse_char(uint8_t *ch_p, const char** str_p)
35309a3aaf3SDag-Erling Smørgrav {
35409a3aaf3SDag-Erling Smørgrav switch (**str_p) {
35509a3aaf3SDag-Erling Smørgrav
35609a3aaf3SDag-Erling Smørgrav case '\0': return 0;
35709a3aaf3SDag-Erling Smørgrav
35809a3aaf3SDag-Erling Smørgrav case '\\': *str_p += 1;
35909a3aaf3SDag-Erling Smørgrav return sldns_parse_escape(ch_p, str_p);
36009a3aaf3SDag-Erling Smørgrav
36109a3aaf3SDag-Erling Smørgrav default: *ch_p = (uint8_t)*(*str_p)++;
36209a3aaf3SDag-Erling Smørgrav return 1;
36309a3aaf3SDag-Erling Smørgrav }
36409a3aaf3SDag-Erling Smørgrav }
36509a3aaf3SDag-Erling Smørgrav
sldns_b32_ntop_calculate_size(size_t src_data_length)36609a3aaf3SDag-Erling Smørgrav size_t sldns_b32_ntop_calculate_size(size_t src_data_length)
36709a3aaf3SDag-Erling Smørgrav {
36809a3aaf3SDag-Erling Smørgrav return src_data_length == 0 ? 0 : ((src_data_length - 1) / 5 + 1) * 8;
36909a3aaf3SDag-Erling Smørgrav }
37009a3aaf3SDag-Erling Smørgrav
sldns_b32_ntop_calculate_size_no_padding(size_t src_data_length)37109a3aaf3SDag-Erling Smørgrav size_t sldns_b32_ntop_calculate_size_no_padding(size_t src_data_length)
37209a3aaf3SDag-Erling Smørgrav {
37309a3aaf3SDag-Erling Smørgrav return ((src_data_length + 3) * 8 / 5) - 4;
37409a3aaf3SDag-Erling Smørgrav }
37509a3aaf3SDag-Erling Smørgrav
37609a3aaf3SDag-Erling Smørgrav static int
sldns_b32_ntop_base(const uint8_t * src,size_t src_sz,char * dst,size_t dst_sz,int extended_hex,int add_padding)37709a3aaf3SDag-Erling Smørgrav sldns_b32_ntop_base(const uint8_t* src, size_t src_sz, char* dst, size_t dst_sz,
37809a3aaf3SDag-Erling Smørgrav int extended_hex, int add_padding)
37909a3aaf3SDag-Erling Smørgrav {
38009a3aaf3SDag-Erling Smørgrav size_t ret_sz;
38109a3aaf3SDag-Erling Smørgrav const char* b32 = extended_hex ? "0123456789abcdefghijklmnopqrstuv"
38209a3aaf3SDag-Erling Smørgrav : "abcdefghijklmnopqrstuvwxyz234567";
38309a3aaf3SDag-Erling Smørgrav
38409a3aaf3SDag-Erling Smørgrav size_t c = 0; /* c is used to carry partial base32 character over
38509a3aaf3SDag-Erling Smørgrav * byte boundaries for sizes with a remainder.
38609a3aaf3SDag-Erling Smørgrav * (i.e. src_sz % 5 != 0)
38709a3aaf3SDag-Erling Smørgrav */
38809a3aaf3SDag-Erling Smørgrav
38909a3aaf3SDag-Erling Smørgrav ret_sz = add_padding ? sldns_b32_ntop_calculate_size(src_sz)
39009a3aaf3SDag-Erling Smørgrav : sldns_b32_ntop_calculate_size_no_padding(src_sz);
39109a3aaf3SDag-Erling Smørgrav
39209a3aaf3SDag-Erling Smørgrav /* Do we have enough space? */
39309a3aaf3SDag-Erling Smørgrav if (dst_sz < ret_sz + 1)
39409a3aaf3SDag-Erling Smørgrav return -1;
39509a3aaf3SDag-Erling Smørgrav
39609a3aaf3SDag-Erling Smørgrav /* We know the size; terminate the string */
39709a3aaf3SDag-Erling Smørgrav dst[ret_sz] = '\0';
39809a3aaf3SDag-Erling Smørgrav
39909a3aaf3SDag-Erling Smørgrav /* First process all chunks of five */
40009a3aaf3SDag-Erling Smørgrav while (src_sz >= 5) {
40109a3aaf3SDag-Erling Smørgrav /* 00000... ........ ........ ........ ........ */
40209a3aaf3SDag-Erling Smørgrav dst[0] = b32[(src[0] ) >> 3];
40309a3aaf3SDag-Erling Smørgrav
40409a3aaf3SDag-Erling Smørgrav /* .....111 11...... ........ ........ ........ */
40509a3aaf3SDag-Erling Smørgrav dst[1] = b32[(src[0] & 0x07) << 2 | src[1] >> 6];
40609a3aaf3SDag-Erling Smørgrav
40709a3aaf3SDag-Erling Smørgrav /* ........ ..22222. ........ ........ ........ */
40809a3aaf3SDag-Erling Smørgrav dst[2] = b32[(src[1] & 0x3e) >> 1];
40909a3aaf3SDag-Erling Smørgrav
41009a3aaf3SDag-Erling Smørgrav /* ........ .......3 3333.... ........ ........ */
41109a3aaf3SDag-Erling Smørgrav dst[3] = b32[(src[1] & 0x01) << 4 | src[2] >> 4];
41209a3aaf3SDag-Erling Smørgrav
41309a3aaf3SDag-Erling Smørgrav /* ........ ........ ....4444 4....... ........ */
41409a3aaf3SDag-Erling Smørgrav dst[4] = b32[(src[2] & 0x0f) << 1 | src[3] >> 7];
41509a3aaf3SDag-Erling Smørgrav
41609a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ .55555.. ........ */
41709a3aaf3SDag-Erling Smørgrav dst[5] = b32[(src[3] & 0x7c) >> 2];
41809a3aaf3SDag-Erling Smørgrav
41909a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ ......66 666..... */
42009a3aaf3SDag-Erling Smørgrav dst[6] = b32[(src[3] & 0x03) << 3 | src[4] >> 5];
42109a3aaf3SDag-Erling Smørgrav
42209a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ ........ ...77777 */
42309a3aaf3SDag-Erling Smørgrav dst[7] = b32[(src[4] & 0x1f) ];
42409a3aaf3SDag-Erling Smørgrav
42509a3aaf3SDag-Erling Smørgrav src_sz -= 5;
42609a3aaf3SDag-Erling Smørgrav src += 5;
42709a3aaf3SDag-Erling Smørgrav dst += 8;
42809a3aaf3SDag-Erling Smørgrav }
42909a3aaf3SDag-Erling Smørgrav /* Process what remains */
43009a3aaf3SDag-Erling Smørgrav switch (src_sz) {
43109a3aaf3SDag-Erling Smørgrav case 4: /* ........ ........ ........ ......66 666..... */
43209a3aaf3SDag-Erling Smørgrav dst[6] = b32[(src[3] & 0x03) << 3];
43309a3aaf3SDag-Erling Smørgrav
43409a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ .55555.. ........ */
43509a3aaf3SDag-Erling Smørgrav dst[5] = b32[(src[3] & 0x7c) >> 2];
43609a3aaf3SDag-Erling Smørgrav
43709a3aaf3SDag-Erling Smørgrav /* ........ ........ ....4444 4....... ........ */
43809a3aaf3SDag-Erling Smørgrav c = src[3] >> 7 ;
439971980c3SDag-Erling Smørgrav /* fallthrough */
44009a3aaf3SDag-Erling Smørgrav case 3: dst[4] = b32[(src[2] & 0x0f) << 1 | c];
44109a3aaf3SDag-Erling Smørgrav
44209a3aaf3SDag-Erling Smørgrav /* ........ .......3 3333.... ........ ........ */
44309a3aaf3SDag-Erling Smørgrav c = src[2] >> 4 ;
444971980c3SDag-Erling Smørgrav /* fallthrough */
44509a3aaf3SDag-Erling Smørgrav case 2: dst[3] = b32[(src[1] & 0x01) << 4 | c];
44609a3aaf3SDag-Erling Smørgrav
44709a3aaf3SDag-Erling Smørgrav /* ........ ..22222. ........ ........ ........ */
44809a3aaf3SDag-Erling Smørgrav dst[2] = b32[(src[1] & 0x3e) >> 1];
44909a3aaf3SDag-Erling Smørgrav
45009a3aaf3SDag-Erling Smørgrav /* .....111 11...... ........ ........ ........ */
45109a3aaf3SDag-Erling Smørgrav c = src[1] >> 6 ;
452971980c3SDag-Erling Smørgrav /* fallthrough */
45309a3aaf3SDag-Erling Smørgrav case 1: dst[1] = b32[(src[0] & 0x07) << 2 | c];
45409a3aaf3SDag-Erling Smørgrav
45509a3aaf3SDag-Erling Smørgrav /* 00000... ........ ........ ........ ........ */
45609a3aaf3SDag-Erling Smørgrav dst[0] = b32[ src[0] >> 3];
45709a3aaf3SDag-Erling Smørgrav }
45809a3aaf3SDag-Erling Smørgrav /* Add padding */
45909a3aaf3SDag-Erling Smørgrav if (add_padding) {
46009a3aaf3SDag-Erling Smørgrav switch (src_sz) {
46109a3aaf3SDag-Erling Smørgrav case 1: dst[2] = '=';
46209a3aaf3SDag-Erling Smørgrav dst[3] = '=';
463971980c3SDag-Erling Smørgrav /* fallthrough */
46409a3aaf3SDag-Erling Smørgrav case 2: dst[4] = '=';
465971980c3SDag-Erling Smørgrav /* fallthrough */
46609a3aaf3SDag-Erling Smørgrav case 3: dst[5] = '=';
46709a3aaf3SDag-Erling Smørgrav dst[6] = '=';
468971980c3SDag-Erling Smørgrav /* fallthrough */
46909a3aaf3SDag-Erling Smørgrav case 4: dst[7] = '=';
47009a3aaf3SDag-Erling Smørgrav }
47109a3aaf3SDag-Erling Smørgrav }
47209a3aaf3SDag-Erling Smørgrav return (int)ret_sz;
47309a3aaf3SDag-Erling Smørgrav }
47409a3aaf3SDag-Erling Smørgrav
47509a3aaf3SDag-Erling Smørgrav int
sldns_b32_ntop(const uint8_t * src,size_t src_sz,char * dst,size_t dst_sz)47609a3aaf3SDag-Erling Smørgrav sldns_b32_ntop(const uint8_t* src, size_t src_sz, char* dst, size_t dst_sz)
47709a3aaf3SDag-Erling Smørgrav {
47809a3aaf3SDag-Erling Smørgrav return sldns_b32_ntop_base(src, src_sz, dst, dst_sz, 0, 1);
47909a3aaf3SDag-Erling Smørgrav }
48009a3aaf3SDag-Erling Smørgrav
48109a3aaf3SDag-Erling Smørgrav int
sldns_b32_ntop_extended_hex(const uint8_t * src,size_t src_sz,char * dst,size_t dst_sz)48209a3aaf3SDag-Erling Smørgrav sldns_b32_ntop_extended_hex(const uint8_t* src, size_t src_sz,
48309a3aaf3SDag-Erling Smørgrav char* dst, size_t dst_sz)
48409a3aaf3SDag-Erling Smørgrav {
48509a3aaf3SDag-Erling Smørgrav return sldns_b32_ntop_base(src, src_sz, dst, dst_sz, 1, 1);
48609a3aaf3SDag-Erling Smørgrav }
48709a3aaf3SDag-Erling Smørgrav
sldns_b32_pton_calculate_size(size_t src_text_length)48809a3aaf3SDag-Erling Smørgrav size_t sldns_b32_pton_calculate_size(size_t src_text_length)
48909a3aaf3SDag-Erling Smørgrav {
49009a3aaf3SDag-Erling Smørgrav return src_text_length * 5 / 8;
49109a3aaf3SDag-Erling Smørgrav }
49209a3aaf3SDag-Erling Smørgrav
49309a3aaf3SDag-Erling Smørgrav static int
sldns_b32_pton_base(const char * src,size_t src_sz,uint8_t * dst,size_t dst_sz,int extended_hex,int check_padding)49409a3aaf3SDag-Erling Smørgrav sldns_b32_pton_base(const char* src, size_t src_sz, uint8_t* dst, size_t dst_sz,
49509a3aaf3SDag-Erling Smørgrav int extended_hex, int check_padding)
49609a3aaf3SDag-Erling Smørgrav {
49709a3aaf3SDag-Erling Smørgrav size_t i = 0;
49809a3aaf3SDag-Erling Smørgrav char ch = '\0';
49909a3aaf3SDag-Erling Smørgrav uint8_t buf[8];
50009a3aaf3SDag-Erling Smørgrav uint8_t* start = dst;
50109a3aaf3SDag-Erling Smørgrav
50209a3aaf3SDag-Erling Smørgrav while (src_sz) {
50309a3aaf3SDag-Erling Smørgrav /* Collect 8 characters in buf (if possible) */
50409a3aaf3SDag-Erling Smørgrav for (i = 0; i < 8; i++) {
50509a3aaf3SDag-Erling Smørgrav
50609a3aaf3SDag-Erling Smørgrav do {
50709a3aaf3SDag-Erling Smørgrav ch = *src++;
50809a3aaf3SDag-Erling Smørgrav --src_sz;
50909a3aaf3SDag-Erling Smørgrav
51009a3aaf3SDag-Erling Smørgrav } while (isspace((unsigned char)ch) && src_sz > 0);
51109a3aaf3SDag-Erling Smørgrav
51209a3aaf3SDag-Erling Smørgrav if (ch == '=' || ch == '\0')
51309a3aaf3SDag-Erling Smørgrav break;
51409a3aaf3SDag-Erling Smørgrav
51509a3aaf3SDag-Erling Smørgrav else if (extended_hex)
51609a3aaf3SDag-Erling Smørgrav
51709a3aaf3SDag-Erling Smørgrav if (ch >= '0' && ch <= '9')
51809a3aaf3SDag-Erling Smørgrav buf[i] = (uint8_t)ch - '0';
51909a3aaf3SDag-Erling Smørgrav else if (ch >= 'a' && ch <= 'v')
52009a3aaf3SDag-Erling Smørgrav buf[i] = (uint8_t)ch - 'a' + 10;
52109a3aaf3SDag-Erling Smørgrav else if (ch >= 'A' && ch <= 'V')
52209a3aaf3SDag-Erling Smørgrav buf[i] = (uint8_t)ch - 'A' + 10;
52309a3aaf3SDag-Erling Smørgrav else
52409a3aaf3SDag-Erling Smørgrav return -1;
52509a3aaf3SDag-Erling Smørgrav
52609a3aaf3SDag-Erling Smørgrav else if (ch >= 'a' && ch <= 'z')
52709a3aaf3SDag-Erling Smørgrav buf[i] = (uint8_t)ch - 'a';
52809a3aaf3SDag-Erling Smørgrav else if (ch >= 'A' && ch <= 'Z')
52909a3aaf3SDag-Erling Smørgrav buf[i] = (uint8_t)ch - 'A';
53009a3aaf3SDag-Erling Smørgrav else if (ch >= '2' && ch <= '7')
53109a3aaf3SDag-Erling Smørgrav buf[i] = (uint8_t)ch - '2' + 26;
53209a3aaf3SDag-Erling Smørgrav else
53309a3aaf3SDag-Erling Smørgrav return -1;
53409a3aaf3SDag-Erling Smørgrav }
53509a3aaf3SDag-Erling Smørgrav /* Less that 8 characters. We're done. */
53609a3aaf3SDag-Erling Smørgrav if (i < 8)
53709a3aaf3SDag-Erling Smørgrav break;
53809a3aaf3SDag-Erling Smørgrav
53909a3aaf3SDag-Erling Smørgrav /* Enough space available at the destination? */
54009a3aaf3SDag-Erling Smørgrav if (dst_sz < 5)
54109a3aaf3SDag-Erling Smørgrav return -1;
54209a3aaf3SDag-Erling Smørgrav
54309a3aaf3SDag-Erling Smørgrav /* 00000... ........ ........ ........ ........ */
54409a3aaf3SDag-Erling Smørgrav /* .....111 11...... ........ ........ ........ */
54509a3aaf3SDag-Erling Smørgrav dst[0] = buf[0] << 3 | buf[1] >> 2;
54609a3aaf3SDag-Erling Smørgrav
54709a3aaf3SDag-Erling Smørgrav /* .....111 11...... ........ ........ ........ */
54809a3aaf3SDag-Erling Smørgrav /* ........ ..22222. ........ ........ ........ */
54909a3aaf3SDag-Erling Smørgrav /* ........ .......3 3333.... ........ ........ */
55009a3aaf3SDag-Erling Smørgrav dst[1] = buf[1] << 6 | buf[2] << 1 | buf[3] >> 4;
55109a3aaf3SDag-Erling Smørgrav
55209a3aaf3SDag-Erling Smørgrav /* ........ .......3 3333.... ........ ........ */
55309a3aaf3SDag-Erling Smørgrav /* ........ ........ ....4444 4....... ........ */
55409a3aaf3SDag-Erling Smørgrav dst[2] = buf[3] << 4 | buf[4] >> 1;
55509a3aaf3SDag-Erling Smørgrav
55609a3aaf3SDag-Erling Smørgrav /* ........ ........ ....4444 4....... ........ */
55709a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ .55555.. ........ */
55809a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ ......66 666..... */
55909a3aaf3SDag-Erling Smørgrav dst[3] = buf[4] << 7 | buf[5] << 2 | buf[6] >> 3;
56009a3aaf3SDag-Erling Smørgrav
56109a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ ......66 666..... */
56209a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ ........ ...77777 */
56309a3aaf3SDag-Erling Smørgrav dst[4] = buf[6] << 5 | buf[7];
56409a3aaf3SDag-Erling Smørgrav
56509a3aaf3SDag-Erling Smørgrav dst += 5;
56609a3aaf3SDag-Erling Smørgrav dst_sz -= 5;
56709a3aaf3SDag-Erling Smørgrav }
56809a3aaf3SDag-Erling Smørgrav /* Not ending on a eight byte boundary? */
56909a3aaf3SDag-Erling Smørgrav if (i > 0 && i < 8) {
57009a3aaf3SDag-Erling Smørgrav
57109a3aaf3SDag-Erling Smørgrav /* Enough space available at the destination? */
57209a3aaf3SDag-Erling Smørgrav if (dst_sz < (i + 1) / 2)
57309a3aaf3SDag-Erling Smørgrav return -1;
57409a3aaf3SDag-Erling Smørgrav
57509a3aaf3SDag-Erling Smørgrav switch (i) {
57609a3aaf3SDag-Erling Smørgrav case 7: /* ........ ........ ........ ......66 666..... */
57709a3aaf3SDag-Erling Smørgrav /* ........ ........ ........ .55555.. ........ */
57809a3aaf3SDag-Erling Smørgrav /* ........ ........ ....4444 4....... ........ */
57909a3aaf3SDag-Erling Smørgrav dst[3] = buf[4] << 7 | buf[5] << 2 | buf[6] >> 3;
580971980c3SDag-Erling Smørgrav /* fallthrough */
58109a3aaf3SDag-Erling Smørgrav
58209a3aaf3SDag-Erling Smørgrav case 5: /* ........ ........ ....4444 4....... ........ */
58309a3aaf3SDag-Erling Smørgrav /* ........ .......3 3333.... ........ ........ */
58409a3aaf3SDag-Erling Smørgrav dst[2] = buf[3] << 4 | buf[4] >> 1;
585971980c3SDag-Erling Smørgrav /* fallthrough */
58609a3aaf3SDag-Erling Smørgrav
58709a3aaf3SDag-Erling Smørgrav case 4: /* ........ .......3 3333.... ........ ........ */
58809a3aaf3SDag-Erling Smørgrav /* ........ ..22222. ........ ........ ........ */
58909a3aaf3SDag-Erling Smørgrav /* .....111 11...... ........ ........ ........ */
59009a3aaf3SDag-Erling Smørgrav dst[1] = buf[1] << 6 | buf[2] << 1 | buf[3] >> 4;
591971980c3SDag-Erling Smørgrav /* fallthrough */
59209a3aaf3SDag-Erling Smørgrav
59309a3aaf3SDag-Erling Smørgrav case 2: /* .....111 11...... ........ ........ ........ */
59409a3aaf3SDag-Erling Smørgrav /* 00000... ........ ........ ........ ........ */
59509a3aaf3SDag-Erling Smørgrav dst[0] = buf[0] << 3 | buf[1] >> 2;
59609a3aaf3SDag-Erling Smørgrav
59709a3aaf3SDag-Erling Smørgrav break;
59809a3aaf3SDag-Erling Smørgrav
59909a3aaf3SDag-Erling Smørgrav default:
60009a3aaf3SDag-Erling Smørgrav return -1;
60109a3aaf3SDag-Erling Smørgrav }
60209a3aaf3SDag-Erling Smørgrav dst += (i + 1) / 2;
60309a3aaf3SDag-Erling Smørgrav
60409a3aaf3SDag-Erling Smørgrav if (check_padding) {
60509a3aaf3SDag-Erling Smørgrav /* Check remaining padding characters */
60609a3aaf3SDag-Erling Smørgrav if (ch != '=')
60709a3aaf3SDag-Erling Smørgrav return -1;
60809a3aaf3SDag-Erling Smørgrav
60909a3aaf3SDag-Erling Smørgrav /* One down, 8 - i - 1 more to come... */
61009a3aaf3SDag-Erling Smørgrav for (i = 8 - i - 1; i > 0; i--) {
61109a3aaf3SDag-Erling Smørgrav
61209a3aaf3SDag-Erling Smørgrav do {
61309a3aaf3SDag-Erling Smørgrav if (src_sz == 0)
61409a3aaf3SDag-Erling Smørgrav return -1;
61509a3aaf3SDag-Erling Smørgrav ch = *src++;
61609a3aaf3SDag-Erling Smørgrav src_sz--;
61709a3aaf3SDag-Erling Smørgrav
61809a3aaf3SDag-Erling Smørgrav } while (isspace((unsigned char)ch));
61909a3aaf3SDag-Erling Smørgrav
62009a3aaf3SDag-Erling Smørgrav if (ch != '=')
62109a3aaf3SDag-Erling Smørgrav return -1;
62209a3aaf3SDag-Erling Smørgrav }
62309a3aaf3SDag-Erling Smørgrav }
62409a3aaf3SDag-Erling Smørgrav }
62509a3aaf3SDag-Erling Smørgrav return dst - start;
62609a3aaf3SDag-Erling Smørgrav }
62709a3aaf3SDag-Erling Smørgrav
62809a3aaf3SDag-Erling Smørgrav int
sldns_b32_pton(const char * src,size_t src_sz,uint8_t * dst,size_t dst_sz)62909a3aaf3SDag-Erling Smørgrav sldns_b32_pton(const char* src, size_t src_sz, uint8_t* dst, size_t dst_sz)
63009a3aaf3SDag-Erling Smørgrav {
63109a3aaf3SDag-Erling Smørgrav return sldns_b32_pton_base(src, src_sz, dst, dst_sz, 0, 1);
63209a3aaf3SDag-Erling Smørgrav }
63309a3aaf3SDag-Erling Smørgrav
63409a3aaf3SDag-Erling Smørgrav int
sldns_b32_pton_extended_hex(const char * src,size_t src_sz,uint8_t * dst,size_t dst_sz)63509a3aaf3SDag-Erling Smørgrav sldns_b32_pton_extended_hex(const char* src, size_t src_sz,
63609a3aaf3SDag-Erling Smørgrav uint8_t* dst, size_t dst_sz)
63709a3aaf3SDag-Erling Smørgrav {
63809a3aaf3SDag-Erling Smørgrav return sldns_b32_pton_base(src, src_sz, dst, dst_sz, 1, 1);
63909a3aaf3SDag-Erling Smørgrav }
64009a3aaf3SDag-Erling Smørgrav
sldns_b64_ntop_calculate_size(size_t srcsize)64109a3aaf3SDag-Erling Smørgrav size_t sldns_b64_ntop_calculate_size(size_t srcsize)
64209a3aaf3SDag-Erling Smørgrav {
64309a3aaf3SDag-Erling Smørgrav return ((((srcsize + 2) / 3) * 4) + 1);
64409a3aaf3SDag-Erling Smørgrav }
64509a3aaf3SDag-Erling Smørgrav
64609a3aaf3SDag-Erling Smørgrav /* RFC 1521, section 5.2.
64709a3aaf3SDag-Erling Smørgrav *
64809a3aaf3SDag-Erling Smørgrav * The encoding process represents 24-bit groups of input bits as output
64909a3aaf3SDag-Erling Smørgrav * strings of 4 encoded characters. Proceeding from left to right, a
65009a3aaf3SDag-Erling Smørgrav * 24-bit input group is formed by concatenating 3 8-bit input groups.
65109a3aaf3SDag-Erling Smørgrav * These 24 bits are then treated as 4 concatenated 6-bit groups, each
65209a3aaf3SDag-Erling Smørgrav * of which is translated into a single digit in the base64 alphabet.
65309a3aaf3SDag-Erling Smørgrav *
65409a3aaf3SDag-Erling Smørgrav * This routine does not insert spaces or linebreaks after 76 characters.
65509a3aaf3SDag-Erling Smørgrav */
sldns_b64_ntop_base(uint8_t const * src,size_t srclength,char * target,size_t targsize,int base64url,int padding)656c0caa2e2SCy Schubert static int sldns_b64_ntop_base(uint8_t const *src, size_t srclength,
657c0caa2e2SCy Schubert char *target, size_t targsize, int base64url, int padding)
65809a3aaf3SDag-Erling Smørgrav {
659c0caa2e2SCy Schubert char* b64;
66009a3aaf3SDag-Erling Smørgrav const char pad64 = '=';
66109a3aaf3SDag-Erling Smørgrav size_t i = 0, o = 0;
662c0caa2e2SCy Schubert if(base64url)
663c0caa2e2SCy Schubert b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123"
664c0caa2e2SCy Schubert "456789-_";
665c0caa2e2SCy Schubert else
666c0caa2e2SCy Schubert b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123"
667c0caa2e2SCy Schubert "456789+/";
66809a3aaf3SDag-Erling Smørgrav if(targsize < sldns_b64_ntop_calculate_size(srclength))
66909a3aaf3SDag-Erling Smørgrav return -1;
67009a3aaf3SDag-Erling Smørgrav /* whole chunks: xxxxxxyy yyyyzzzz zzwwwwww */
67109a3aaf3SDag-Erling Smørgrav while(i+3 <= srclength) {
67209a3aaf3SDag-Erling Smørgrav if(o+4 > targsize) return -1;
67309a3aaf3SDag-Erling Smørgrav target[o] = b64[src[i] >> 2];
67409a3aaf3SDag-Erling Smørgrav target[o+1] = b64[ ((src[i]&0x03)<<4) | (src[i+1]>>4) ];
67509a3aaf3SDag-Erling Smørgrav target[o+2] = b64[ ((src[i+1]&0x0f)<<2) | (src[i+2]>>6) ];
67609a3aaf3SDag-Erling Smørgrav target[o+3] = b64[ (src[i+2]&0x3f) ];
67709a3aaf3SDag-Erling Smørgrav i += 3;
67809a3aaf3SDag-Erling Smørgrav o += 4;
67909a3aaf3SDag-Erling Smørgrav }
68009a3aaf3SDag-Erling Smørgrav /* remainder */
68109a3aaf3SDag-Erling Smørgrav switch(srclength - i) {
68209a3aaf3SDag-Erling Smørgrav case 2:
68309a3aaf3SDag-Erling Smørgrav /* two at end, converted into A B C = */
68409a3aaf3SDag-Erling Smørgrav target[o] = b64[src[i] >> 2];
68509a3aaf3SDag-Erling Smørgrav target[o+1] = b64[ ((src[i]&0x03)<<4) | (src[i+1]>>4) ];
68609a3aaf3SDag-Erling Smørgrav target[o+2] = b64[ ((src[i+1]&0x0f)<<2) ];
687c0caa2e2SCy Schubert if(padding) {
68809a3aaf3SDag-Erling Smørgrav target[o+3] = pad64;
689e2d15004SDag-Erling Smørgrav /* i += 2; */
69009a3aaf3SDag-Erling Smørgrav o += 4;
691c0caa2e2SCy Schubert } else {
692c0caa2e2SCy Schubert o += 3;
693c0caa2e2SCy Schubert }
69409a3aaf3SDag-Erling Smørgrav break;
69509a3aaf3SDag-Erling Smørgrav case 1:
69609a3aaf3SDag-Erling Smørgrav /* one at end, converted into A B = = */
69709a3aaf3SDag-Erling Smørgrav target[o] = b64[src[i] >> 2];
69809a3aaf3SDag-Erling Smørgrav target[o+1] = b64[ ((src[i]&0x03)<<4) ];
699c0caa2e2SCy Schubert if(padding) {
70009a3aaf3SDag-Erling Smørgrav target[o+2] = pad64;
70109a3aaf3SDag-Erling Smørgrav target[o+3] = pad64;
702e2d15004SDag-Erling Smørgrav /* i += 1; */
70309a3aaf3SDag-Erling Smørgrav o += 4;
704c0caa2e2SCy Schubert } else {
705c0caa2e2SCy Schubert o += 2;
706c0caa2e2SCy Schubert }
70709a3aaf3SDag-Erling Smørgrav break;
70809a3aaf3SDag-Erling Smørgrav case 0:
70909a3aaf3SDag-Erling Smørgrav default:
71009a3aaf3SDag-Erling Smørgrav /* nothing */
71109a3aaf3SDag-Erling Smørgrav break;
71209a3aaf3SDag-Erling Smørgrav }
71309a3aaf3SDag-Erling Smørgrav /* assert: i == srclength */
71409a3aaf3SDag-Erling Smørgrav if(o+1 > targsize) return -1;
71509a3aaf3SDag-Erling Smørgrav target[o] = 0;
71609a3aaf3SDag-Erling Smørgrav return (int)o;
71709a3aaf3SDag-Erling Smørgrav }
71809a3aaf3SDag-Erling Smørgrav
sldns_b64_ntop(uint8_t const * src,size_t srclength,char * target,size_t targsize)719c0caa2e2SCy Schubert int sldns_b64_ntop(uint8_t const *src, size_t srclength, char *target,
720c0caa2e2SCy Schubert size_t targsize)
721c0caa2e2SCy Schubert {
722c0caa2e2SCy Schubert return sldns_b64_ntop_base(src, srclength, target, targsize,
723c0caa2e2SCy Schubert 0 /* no base64url */, 1 /* padding */);
724c0caa2e2SCy Schubert }
725c0caa2e2SCy Schubert
sldns_b64url_ntop(uint8_t const * src,size_t srclength,char * target,size_t targsize)726c0caa2e2SCy Schubert int sldns_b64url_ntop(uint8_t const *src, size_t srclength, char *target,
727c0caa2e2SCy Schubert size_t targsize)
728c0caa2e2SCy Schubert {
729c0caa2e2SCy Schubert return sldns_b64_ntop_base(src, srclength, target, targsize,
730c0caa2e2SCy Schubert 1 /* base64url */, 0 /* no padding */);
731c0caa2e2SCy Schubert }
732c0caa2e2SCy Schubert
sldns_b64_pton_calculate_size(size_t srcsize)73309a3aaf3SDag-Erling Smørgrav size_t sldns_b64_pton_calculate_size(size_t srcsize)
73409a3aaf3SDag-Erling Smørgrav {
73509a3aaf3SDag-Erling Smørgrav return (((((srcsize + 3) / 4) * 3)) + 1);
73609a3aaf3SDag-Erling Smørgrav }
73709a3aaf3SDag-Erling Smørgrav
738c0caa2e2SCy Schubert /* padding not required if srcsize is set */
sldns_b64_pton_base(char const * src,size_t srcsize,uint8_t * target,size_t targsize,int base64url)739c0caa2e2SCy Schubert static int sldns_b64_pton_base(char const *src, size_t srcsize, uint8_t *target,
740c0caa2e2SCy Schubert size_t targsize, int base64url)
74109a3aaf3SDag-Erling Smørgrav {
74209a3aaf3SDag-Erling Smørgrav const uint8_t pad64 = 64; /* is 64th in the b64 array */
74309a3aaf3SDag-Erling Smørgrav const char* s = src;
74409a3aaf3SDag-Erling Smørgrav uint8_t in[4];
74509a3aaf3SDag-Erling Smørgrav size_t o = 0, incount = 0;
746c0caa2e2SCy Schubert int check_padding = (srcsize) ? 0 : 1;
74709a3aaf3SDag-Erling Smørgrav
748c0caa2e2SCy Schubert while(*s && (check_padding || srcsize)) {
74909a3aaf3SDag-Erling Smørgrav /* skip any character that is not base64 */
75009a3aaf3SDag-Erling Smørgrav /* conceptually we do:
75109a3aaf3SDag-Erling Smørgrav const char* b64 = pad'=' is appended to array
75209a3aaf3SDag-Erling Smørgrav "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
75309a3aaf3SDag-Erling Smørgrav const char* d = strchr(b64, *s++);
75409a3aaf3SDag-Erling Smørgrav and use d-b64;
75509a3aaf3SDag-Erling Smørgrav */
75609a3aaf3SDag-Erling Smørgrav char d = *s++;
757c0caa2e2SCy Schubert srcsize--;
75809a3aaf3SDag-Erling Smørgrav if(d <= 'Z' && d >= 'A')
75909a3aaf3SDag-Erling Smørgrav d -= 'A';
76009a3aaf3SDag-Erling Smørgrav else if(d <= 'z' && d >= 'a')
76109a3aaf3SDag-Erling Smørgrav d = d - 'a' + 26;
76209a3aaf3SDag-Erling Smørgrav else if(d <= '9' && d >= '0')
76309a3aaf3SDag-Erling Smørgrav d = d - '0' + 52;
764c0caa2e2SCy Schubert else if(!base64url && d == '+')
76509a3aaf3SDag-Erling Smørgrav d = 62;
766c0caa2e2SCy Schubert else if(base64url && d == '-')
767c0caa2e2SCy Schubert d = 62;
768c0caa2e2SCy Schubert else if(!base64url && d == '/')
76909a3aaf3SDag-Erling Smørgrav d = 63;
770c0caa2e2SCy Schubert else if(base64url && d == '_')
771c0caa2e2SCy Schubert d = 63;
772c0caa2e2SCy Schubert else if(d == '=') {
773c0caa2e2SCy Schubert if(!check_padding)
77409a3aaf3SDag-Erling Smørgrav continue;
775c0caa2e2SCy Schubert d = 64;
776c0caa2e2SCy Schubert } else continue;
777c0caa2e2SCy Schubert
778c0caa2e2SCy Schubert in[incount++] = (uint8_t)d;
779c0caa2e2SCy Schubert /* work on block of 4, unless padding is not used and there are
780c0caa2e2SCy Schubert * less than 4 chars left */
781c0caa2e2SCy Schubert if(incount != 4 && (check_padding || srcsize))
782c0caa2e2SCy Schubert continue;
783c0caa2e2SCy Schubert assert(!check_padding || incount==4);
78409a3aaf3SDag-Erling Smørgrav /* process whole block of 4 characters into 3 output bytes */
785c0caa2e2SCy Schubert if((incount == 2 ||
786c0caa2e2SCy Schubert (incount == 4 && in[3] == pad64 && in[2] == pad64))) { /* A B = = */
78709a3aaf3SDag-Erling Smørgrav if(o+1 > targsize)
78809a3aaf3SDag-Erling Smørgrav return -1;
78909a3aaf3SDag-Erling Smørgrav target[o] = (in[0]<<2) | ((in[1]&0x30)>>4);
79009a3aaf3SDag-Erling Smørgrav o += 1;
79109a3aaf3SDag-Erling Smørgrav break; /* we are done */
792c0caa2e2SCy Schubert } else if(incount == 3 ||
793c0caa2e2SCy Schubert (incount == 4 && in[3] == pad64)) { /* A B C = */
79409a3aaf3SDag-Erling Smørgrav if(o+2 > targsize)
79509a3aaf3SDag-Erling Smørgrav return -1;
79609a3aaf3SDag-Erling Smørgrav target[o] = (in[0]<<2) | ((in[1]&0x30)>>4);
79709a3aaf3SDag-Erling Smørgrav target[o+1]= ((in[1]&0x0f)<<4) | ((in[2]&0x3c)>>2);
79809a3aaf3SDag-Erling Smørgrav o += 2;
79909a3aaf3SDag-Erling Smørgrav break; /* we are done */
80009a3aaf3SDag-Erling Smørgrav } else {
801c0caa2e2SCy Schubert if(incount != 4 || o+3 > targsize)
80209a3aaf3SDag-Erling Smørgrav return -1;
80309a3aaf3SDag-Erling Smørgrav /* write xxxxxxyy yyyyzzzz zzwwwwww */
80409a3aaf3SDag-Erling Smørgrav target[o] = (in[0]<<2) | ((in[1]&0x30)>>4);
80509a3aaf3SDag-Erling Smørgrav target[o+1]= ((in[1]&0x0f)<<4) | ((in[2]&0x3c)>>2);
80609a3aaf3SDag-Erling Smørgrav target[o+2]= ((in[2]&0x03)<<6) | in[3];
80709a3aaf3SDag-Erling Smørgrav o += 3;
80809a3aaf3SDag-Erling Smørgrav }
80909a3aaf3SDag-Erling Smørgrav incount = 0;
81009a3aaf3SDag-Erling Smørgrav }
81109a3aaf3SDag-Erling Smørgrav return (int)o;
81209a3aaf3SDag-Erling Smørgrav }
813c0caa2e2SCy Schubert
sldns_b64_pton(char const * src,uint8_t * target,size_t targsize)814c0caa2e2SCy Schubert int sldns_b64_pton(char const *src, uint8_t *target, size_t targsize)
815c0caa2e2SCy Schubert {
816c0caa2e2SCy Schubert return sldns_b64_pton_base(src, 0, target, targsize, 0);
817c0caa2e2SCy Schubert }
818c0caa2e2SCy Schubert
sldns_b64url_pton(char const * src,size_t srcsize,uint8_t * target,size_t targsize)819c0caa2e2SCy Schubert int sldns_b64url_pton(char const *src, size_t srcsize, uint8_t *target,
820c0caa2e2SCy Schubert size_t targsize)
821c0caa2e2SCy Schubert {
822c0caa2e2SCy Schubert if(!srcsize) {
823c0caa2e2SCy Schubert return 0;
824c0caa2e2SCy Schubert }
825c0caa2e2SCy Schubert return sldns_b64_pton_base(src, srcsize, target, targsize, 1);
826c0caa2e2SCy Schubert }
8275469a995SCy Schubert
sldns_b64_contains_nonurl(char const * src,size_t srcsize)8285469a995SCy Schubert int sldns_b64_contains_nonurl(char const *src, size_t srcsize)
8295469a995SCy Schubert {
8305469a995SCy Schubert const char* s = src;
8315469a995SCy Schubert while(*s && srcsize) {
8325469a995SCy Schubert char d = *s++;
8335469a995SCy Schubert srcsize--;
8345469a995SCy Schubert /* the '+' and the '/' and padding '=' is not allowed in b64
8355469a995SCy Schubert * url encoding */
8365469a995SCy Schubert if(d == '+' || d == '/' || d == '=') {
8375469a995SCy Schubert return 1;
8385469a995SCy Schubert }
8395469a995SCy Schubert }
8405469a995SCy Schubert return 0;
8415469a995SCy Schubert }
842