2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include "alloc-util.h"
26 #include "hexdecoct.h"
34 int unoctchar(char c) {
36 if (c >= '0' && c <= '7')
43 return '0' + (x % 10);
46 int undecchar(char c) {
48 if (c >= '0' && c <= '9')
55 static const char table[16] = "0123456789abcdef";
60 int unhexchar(char c) {
62 if (c >= '0' && c <= '9')
65 if (c >= 'a' && c <= 'f')
68 if (c >= 'A' && c <= 'F')
74 char *hexmem(const void *p, size_t l) {
78 z = r = malloc(l * 2 + 1);
82 for (x = p; x < (const uint8_t*) p + l; x++) {
83 *(z++) = hexchar(*x >> 4);
84 *(z++) = hexchar(*x & 15);
91 int unhexmem(const char *p, size_t l, void **mem, size_t *len) {
92 _cleanup_free_ uint8_t *r = NULL;
100 z = r = malloc((l + 1) / 2 + 1);
104 for (x = p; x < p + l; x += 2) {
110 else if (x+1 < p + l) {
117 *(z++) = (uint8_t) a << 4 | (uint8_t) b;
129 /* https://tools.ietf.org/html/rfc4648#section-6
130 * Notice that base32hex differs from base32 in the alphabet it uses.
131 * The distinction is that the base32hex representation preserves the
132 * order of the underlying data when compared as bytestrings, this is
133 * useful when representing NSEC3 hashes, as one can then verify the
134 * order of hashes directly from their representation. */
135 char base32hexchar(int x) {
136 static const char table[32] = "0123456789"
137 "ABCDEFGHIJKLMNOPQRSTUV";
139 return table[x & 31];
142 int unbase32hexchar(char c) {
145 if (c >= '0' && c <= '9')
148 offset = '9' - '0' + 1;
150 if (c >= 'A' && c <= 'V')
151 return c - 'A' + offset;
156 char *base32hexmem(const void *p, size_t l, bool padding) {
162 /* five input bytes makes eight output bytes, padding is added so we must round up */
163 len = 8 * (l + 4) / 5;
165 /* same, but round down as there is no padding */
184 z = r = malloc(len + 1);
188 for (x = p; x < (const uint8_t*) p + (l / 5) * 5; x += 5) {
189 /* x[0] == XXXXXXXX; x[1] == YYYYYYYY; x[2] == ZZZZZZZZ
190 x[3] == QQQQQQQQ; x[4] == WWWWWWWW */
191 *(z++) = base32hexchar(x[0] >> 3); /* 000XXXXX */
192 *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6); /* 000XXXYY */
193 *(z++) = base32hexchar((x[1] & 63) >> 1); /* 000YYYYY */
194 *(z++) = base32hexchar((x[1] & 1) << 4 | x[2] >> 4); /* 000YZZZZ */
195 *(z++) = base32hexchar((x[2] & 15) << 1 | x[3] >> 7); /* 000ZZZZQ */
196 *(z++) = base32hexchar((x[3] & 127) >> 2); /* 000QQQQQ */
197 *(z++) = base32hexchar((x[3] & 3) << 3 | x[4] >> 5); /* 000QQWWW */
198 *(z++) = base32hexchar((x[4] & 31)); /* 000WWWWW */
203 *(z++) = base32hexchar(x[0] >> 3); /* 000XXXXX */
204 *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6); /* 000XXXYY */
205 *(z++) = base32hexchar((x[1] & 63) >> 1); /* 000YYYYY */
206 *(z++) = base32hexchar((x[1] & 1) << 4 | x[2] >> 4); /* 000YZZZZ */
207 *(z++) = base32hexchar((x[2] & 15) << 1 | x[3] >> 7); /* 000ZZZZQ */
208 *(z++) = base32hexchar((x[3] & 127) >> 2); /* 000QQQQQ */
209 *(z++) = base32hexchar((x[3] & 3) << 3); /* 000QQ000 */
216 *(z++) = base32hexchar(x[0] >> 3); /* 000XXXXX */
217 *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6); /* 000XXXYY */
218 *(z++) = base32hexchar((x[1] & 63) >> 1); /* 000YYYYY */
219 *(z++) = base32hexchar((x[1] & 1) << 4 | x[2] >> 4); /* 000YZZZZ */
220 *(z++) = base32hexchar((x[2] & 15) << 1); /* 000ZZZZ0 */
230 *(z++) = base32hexchar(x[0] >> 3); /* 000XXXXX */
231 *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6); /* 000XXXYY */
232 *(z++) = base32hexchar((x[1] & 63) >> 1); /* 000YYYYY */
233 *(z++) = base32hexchar((x[1] & 1) << 4); /* 000Y0000 */
244 *(z++) = base32hexchar(x[0] >> 3); /* 000XXXXX */
245 *(z++) = base32hexchar((x[0] & 7) << 2); /* 000XXX00 */
262 int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *_len) {
263 _cleanup_free_ uint8_t *r = NULL;
264 int a, b, c, d, e, f, g, h;
272 /* padding ensures any base32hex input has input divisible by 8 */
273 if (padding && l % 8 != 0)
277 /* strip the padding */
278 while (l > 0 && p[l - 1] == '=' && pad < 7) {
284 /* a group of eight input bytes needs five output bytes, in case of
285 padding we need to add some extra bytes */
307 z = r = malloc(len + 1);
311 for (x = p; x < p + (l / 8) * 8; x += 8) {
312 /* a == 000XXXXX; b == 000YYYYY; c == 000ZZZZZ; d == 000WWWWW
313 e == 000SSSSS; f == 000QQQQQ; g == 000VVVVV; h == 000RRRRR */
314 a = unbase32hexchar(x[0]);
318 b = unbase32hexchar(x[1]);
322 c = unbase32hexchar(x[2]);
326 d = unbase32hexchar(x[3]);
330 e = unbase32hexchar(x[4]);
334 f = unbase32hexchar(x[5]);
338 g = unbase32hexchar(x[6]);
342 h = unbase32hexchar(x[7]);
346 *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2; /* XXXXXYYY */
347 *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
348 *(z++) = (uint8_t) d << 4 | (uint8_t) e >> 1; /* WWWWSSSS */
349 *(z++) = (uint8_t) e << 7 | (uint8_t) f << 2 | (uint8_t) g >> 3; /* SQQQQQVV */
350 *(z++) = (uint8_t) g << 5 | (uint8_t) h; /* VVVRRRRR */
355 a = unbase32hexchar(x[0]);
359 b = unbase32hexchar(x[1]);
363 c = unbase32hexchar(x[2]);
367 d = unbase32hexchar(x[3]);
371 e = unbase32hexchar(x[4]);
375 f = unbase32hexchar(x[5]);
379 g = unbase32hexchar(x[6]);
387 *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2; /* XXXXXYYY */
388 *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
389 *(z++) = (uint8_t) d << 4 | (uint8_t) e >> 1; /* WWWWSSSS */
390 *(z++) = (uint8_t) e << 7 | (uint8_t) f << 2 | (uint8_t) g >> 3; /* SQQQQQVV */
394 a = unbase32hexchar(x[0]);
398 b = unbase32hexchar(x[1]);
402 c = unbase32hexchar(x[2]);
406 d = unbase32hexchar(x[3]);
410 e = unbase32hexchar(x[4]);
418 *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2; /* XXXXXYYY */
419 *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
420 *(z++) = (uint8_t) d << 4 | (uint8_t) e >> 1; /* WWWWSSSS */
424 a = unbase32hexchar(x[0]);
428 b = unbase32hexchar(x[1]);
432 c = unbase32hexchar(x[2]);
436 d = unbase32hexchar(x[3]);
444 *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2; /* XXXXXYYY */
445 *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
449 a = unbase32hexchar(x[0]);
453 b = unbase32hexchar(x[1]);
461 *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2; /* XXXXXYYY */
479 /* https://tools.ietf.org/html/rfc4648#section-4 */
480 char base64char(int x) {
481 static const char table[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
482 "abcdefghijklmnopqrstuvwxyz"
484 return table[x & 63];
487 int unbase64char(char c) {
490 if (c >= 'A' && c <= 'Z')
493 offset = 'Z' - 'A' + 1;
495 if (c >= 'a' && c <= 'z')
496 return c - 'a' + offset;
498 offset += 'z' - 'a' + 1;
500 if (c >= '0' && c <= '9')
501 return c - '0' + offset;
503 offset += '9' - '0' + 1;
516 ssize_t base64mem(const void *p, size_t l, char **out) {
520 /* three input bytes makes four output bytes, padding is added so we must round up */
521 z = r = malloc(4 * (l + 2) / 3 + 1);
525 for (x = p; x < (const uint8_t*) p + (l / 3) * 3; x += 3) {
526 /* x[0] == XXXXXXXX; x[1] == YYYYYYYY; x[2] == ZZZZZZZZ */
527 *(z++) = base64char(x[0] >> 2); /* 00XXXXXX */
528 *(z++) = base64char((x[0] & 3) << 4 | x[1] >> 4); /* 00XXYYYY */
529 *(z++) = base64char((x[1] & 15) << 2 | x[2] >> 6); /* 00YYYYZZ */
530 *(z++) = base64char(x[2] & 63); /* 00ZZZZZZ */
535 *(z++) = base64char(x[0] >> 2); /* 00XXXXXX */
536 *(z++) = base64char((x[0] & 3) << 4 | x[1] >> 4); /* 00XXYYYY */
537 *(z++) = base64char((x[1] & 15) << 2); /* 00YYYY00 */
542 *(z++) = base64char(x[0] >> 2); /* 00XXXXXX */
543 *(z++) = base64char((x[0] & 3) << 4); /* 00XX0000 */
555 static int base64_append_width(char **prefix, int plen,
556 const char *sep, int indent,
557 const void *p, size_t l,
560 _cleanup_free_ char *x = NULL;
562 ssize_t slen, len, avail;
565 len = base64mem(p, l, &x);
569 lines = (len + width - 1) / width;
571 slen = sep ? strlen(sep) : 0;
572 t = realloc(*prefix, plen + 1 + slen + (indent + width + 1) * lines);
576 memcpy_safe(t + plen, sep, slen);
578 for (line = 0, s = t + plen + slen, avail = len; line < lines; line++) {
579 int act = MIN(width, avail);
581 if (line > 0 || sep) {
582 memset(s, ' ', indent);
586 memcpy(s, x + width * line, act);
588 *(s++) = line < lines - 1 ? '\n' : '\0';
597 int base64_append(char **prefix, int plen,
598 const void *p, size_t l,
599 int indent, int width) {
600 if (plen > width / 2 || plen + indent > width)
601 /* leave indent on the left, keep last column free */
602 return base64_append_width(prefix, plen, "\n", indent, p, l, width - indent - 1);
604 /* leave plen on the left, keep last column free */
605 return base64_append_width(prefix, plen, NULL, plen, p, l, width - plen - 1);
609 int unbase64mem(const char *p, size_t l, void **mem, size_t *_len) {
610 _cleanup_free_ uint8_t *r = NULL;
618 /* padding ensures any base63 input has input divisible by 4 */
622 /* strip the padding */
623 if (l > 0 && p[l - 1] == '=')
625 if (l > 0 && p[l - 1] == '=')
628 /* a group of four input bytes needs three output bytes, in case of
629 padding we need to add two or three extra bytes */
630 len = (l / 4) * 3 + (l % 4 ? (l % 4) - 1 : 0);
632 z = r = malloc(len + 1);
636 for (x = p; x < p + (l / 4) * 4; x += 4) {
637 /* a == 00XXXXXX; b == 00YYYYYY; c == 00ZZZZZZ; d == 00WWWWWW */
638 a = unbase64char(x[0]);
642 b = unbase64char(x[1]);
646 c = unbase64char(x[2]);
650 d = unbase64char(x[3]);
654 *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
655 *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
656 *(z++) = (uint8_t) c << 6 | (uint8_t) d; /* ZZWWWWWW */
661 a = unbase64char(x[0]);
665 b = unbase64char(x[1]);
669 c = unbase64char(x[2]);
677 *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
678 *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
682 a = unbase64char(x[0]);
686 b = unbase64char(x[1]);
694 *(z++) = (uint8_t) a << 2 | (uint8_t) (b >> 4); /* XXXXXXYY */
713 void hexdump(FILE *f, const void *p, size_t s) {
714 const uint8_t *b = p;
722 fprintf(f, "%04x ", n);
724 for (i = 0; i < 16; i++) {
729 fprintf(f, "%02x ", b[i]);
737 for (i = 0; i < 16; i++) {
742 fputc(isprint(b[i]) ? (char) b[i] : '.', f);