-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
+/* SPDX-License-Identifier: LGPL-2.1+ */
#include <ctype.h>
#include <errno.h>
#include "alloc-util.h"
#include "hexdecoct.h"
#include "macro.h"
+#include "string-util.h"
#include "util.h"
char octchar(int x) {
return r;
}
-int unhexmem(const char *p, size_t l, void **mem, size_t *len) {
- _cleanup_free_ uint8_t *r = NULL;
- uint8_t *z;
- const char *x;
+static int unhex_next(const char **p, size_t *l) {
+ int r;
- assert(mem);
- assert(len);
assert(p);
+ assert(l);
- if (l % 2 != 0)
- return -EINVAL;
+ /* Find the next non-whitespace character, and decode it. We
+ * greedily skip all preceding and all following whitespace. */
- z = r = malloc((l + 1) / 2 + 1);
- if (!r)
+ for (;;) {
+ if (*l == 0)
+ return -EPIPE;
+
+ if (!strchr(WHITESPACE, **p))
+ break;
+
+ /* Skip leading whitespace */
+ (*p)++, (*l)--;
+ }
+
+ r = unhexchar(**p);
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ (*p)++, (*l)--;
+
+ if (*l == 0 || !strchr(WHITESPACE, **p))
+ break;
+
+ /* Skip following whitespace */
+ }
+
+ return r;
+}
+
+int unhexmem(const char *p, size_t l, void **ret, size_t *ret_len) {
+ _cleanup_free_ uint8_t *buf = NULL;
+ const char *x;
+ uint8_t *z;
+
+ assert(ret);
+ assert(ret_len);
+ assert(p || l == 0);
+
+ if (l == (size_t) -1)
+ l = strlen(p);
+
+ /* Note that the calculation of memory size is an upper boundary, as we ignore whitespace while decoding */
+ buf = malloc((l + 1) / 2 + 1);
+ if (!buf)
return -ENOMEM;
- for (x = p; x < p + l; x += 2) {
+ for (x = p, z = buf;;) {
int a, b;
- a = unhexchar(x[0]);
+ a = unhex_next(&x, &l);
+ if (a == -EPIPE) /* End of string */
+ break;
if (a < 0)
return a;
- b = unhexchar(x[1]);
+ b = unhex_next(&x, &l);
if (b < 0)
return b;
*z = 0;
- *mem = r;
- r = NULL;
- *len = (l + 1) / 2;
+ *ret_len = (size_t) (z - buf);
+ *ret = TAKE_PTR(buf);
return 0;
}
const uint8_t *x;
size_t len;
+ assert(p || l == 0);
+
if (padding)
/* five input bytes makes eight output bytes, padding is added so we must round up */
len = 8 * (l + 4) / 5;
for (x = p; x < (const uint8_t*) p + (l / 5) * 5; x += 5) {
/* x[0] == XXXXXXXX; x[1] == YYYYYYYY; x[2] == ZZZZZZZZ
- x[3] == QQQQQQQQ; x[4] == WWWWWWWW */
+ * x[3] == QQQQQQQQ; x[4] == WWWWWWWW */
*(z++) = base32hexchar(x[0] >> 3); /* 000XXXXX */
*(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6); /* 000XXXYY */
*(z++) = base32hexchar((x[1] & 63) >> 1); /* 000YYYYY */
size_t len;
unsigned pad = 0;
- assert(p);
+ assert(p || l == 0);
+ assert(mem);
+ assert(_len);
+
+ if (l == (size_t) -1)
+ l = strlen(p);
/* padding ensures any base32hex input has input divisible by 8 */
if (padding && l % 8 != 0)
}
/* a group of eight input bytes needs five output bytes, in case of
- padding we need to add some extra bytes */
+ * padding we need to add some extra bytes */
len = (l / 8) * 5;
switch (l % 8) {
for (x = p; x < p + (l / 8) * 8; x += 8) {
/* a == 000XXXXX; b == 000YYYYY; c == 000ZZZZZ; d == 000WWWWW
- e == 000SSSSS; f == 000QQQQQ; g == 000VVVVV; h == 000RRRRR */
+ * e == 000SSSSS; f == 000QQQQQ; g == 000VVVVV; h == 000RRRRR */
a = unbase32hexchar(x[0]);
if (a < 0)
return -EINVAL;
*z = 0;
- *mem = r;
- r = NULL;
+ *mem = TAKE_PTR(r);
*_len = len;
return 0;
char *r, *z;
const uint8_t *x;
+ assert(p || l == 0);
+ assert(out);
+
/* three input bytes makes four output bytes, padding is added so we must round up */
z = r = malloc(4 * (l + 2) / 3 + 1);
if (!r)
return z - r;
}
-static int base64_append_width(char **prefix, int plen,
- const char *sep, int indent,
- const void *p, size_t l,
- int width) {
+static int base64_append_width(
+ char **prefix, int plen,
+ const char *sep, int indent,
+ const void *p, size_t l,
+ int width) {
_cleanup_free_ char *x = NULL;
char *t, *s;
- ssize_t slen, len, avail;
- int line, lines;
+ ssize_t len, slen, avail, line, lines;
len = base64mem(p, l, &x);
if (len <= 0)
return len;
- lines = (len + width - 1) / width;
+ lines = DIV_ROUND_UP(len, width);
- slen = sep ? strlen(sep) : 0;
- t = realloc(*prefix, plen + 1 + slen + (indent + width + 1) * lines);
+ slen = strlen_ptr(sep);
+ if (plen >= SSIZE_MAX - 1 - slen ||
+ lines > (SSIZE_MAX - plen - 1 - slen) / (indent + width + 1))
+ return -ENOMEM;
+
+ t = realloc(*prefix, (ssize_t) plen + 1 + slen + (indent + width + 1) * lines);
if (!t)
return -ENOMEM;
return 0;
}
-int base64_append(char **prefix, int plen,
- const void *p, size_t l,
- int indent, int width) {
+int base64_append(
+ char **prefix, int plen,
+ const void *p, size_t l,
+ int indent, int width) {
+
if (plen > width / 2 || plen + indent > width)
/* leave indent on the left, keep last column free */
return base64_append_width(prefix, plen, "\n", indent, p, l, width - indent - 1);
else
/* leave plen on the left, keep last column free */
- return base64_append_width(prefix, plen, NULL, plen, p, l, width - plen - 1);
-};
+ return base64_append_width(prefix, plen, " ", plen, p, l, width - plen - 1);
+}
-
-int unbase64mem(const char *p, size_t l, void **mem, size_t *_len) {
- _cleanup_free_ uint8_t *r = NULL;
- int a, b, c, d;
- uint8_t *z;
- const char *x;
- size_t len;
+static int unbase64_next(const char **p, size_t *l) {
+ int ret;
assert(p);
+ assert(l);
- /* padding ensures any base63 input has input divisible by 4 */
- if (l % 4 != 0)
- return -EINVAL;
-
- /* strip the padding */
- if (l > 0 && p[l - 1] == '=')
- l--;
- if (l > 0 && p[l - 1] == '=')
- l--;
+ /* Find the next non-whitespace character, and decode it. If we find padding, we return it as INT_MAX. We
+ * greedily skip all preceding and all following whitespace. */
- /* a group of four input bytes needs three output bytes, in case of
- padding we need to add two or three extra bytes */
- len = (l / 4) * 3 + (l % 4 ? (l % 4) - 1 : 0);
+ for (;;) {
+ if (*l == 0)
+ return -EPIPE;
- z = r = malloc(len + 1);
- if (!r)
- return -ENOMEM;
+ if (!strchr(WHITESPACE, **p))
+ break;
- for (x = p; x < p + (l / 4) * 4; x += 4) {
- /* a == 00XXXXXX; b == 00YYYYYY; c == 00ZZZZZZ; d == 00WWWWWW */
- a = unbase64char(x[0]);
- if (a < 0)
- return -EINVAL;
+ /* Skip leading whitespace */
+ (*p)++, (*l)--;
+ }
- b = unbase64char(x[1]);
- if (b < 0)
- return -EINVAL;
+ if (**p == '=')
+ ret = INT_MAX; /* return padding as INT_MAX */
+ else {
+ ret = unbase64char(**p);
+ if (ret < 0)
+ return ret;
+ }
- c = unbase64char(x[2]);
- if (c < 0)
- return -EINVAL;
+ for (;;) {
+ (*p)++, (*l)--;
- d = unbase64char(x[3]);
- if (d < 0)
- return -EINVAL;
+ if (*l == 0)
+ break;
+ if (!strchr(WHITESPACE, **p))
+ break;
- *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
- *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
- *(z++) = (uint8_t) c << 6 | (uint8_t) d; /* ZZWWWWWW */
+ /* Skip following whitespace */
}
- switch (l % 4) {
- case 3:
- a = unbase64char(x[0]);
+ return ret;
+}
+
+int unbase64mem(const char *p, size_t l, void **ret, size_t *ret_size) {
+ _cleanup_free_ uint8_t *buf = NULL;
+ const char *x;
+ uint8_t *z;
+ size_t len;
+
+ assert(p || l == 0);
+ assert(ret);
+ assert(ret_size);
+
+ if (l == (size_t) -1)
+ l = strlen(p);
+
+ /* A group of four input bytes needs three output bytes, in case of padding we need to add two or three extra
+ * bytes. Note that this calculation is an upper boundary, as we ignore whitespace while decoding */
+ len = (l / 4) * 3 + (l % 4 != 0 ? (l % 4) - 1 : 0);
+
+ buf = malloc(len + 1);
+ if (!buf)
+ return -ENOMEM;
+
+ for (x = p, z = buf;;) {
+ int a, b, c, d; /* a == 00XXXXXX; b == 00YYYYYY; c == 00ZZZZZZ; d == 00WWWWWW */
+
+ a = unbase64_next(&x, &l);
+ if (a == -EPIPE) /* End of string */
+ break;
if (a < 0)
+ return a;
+ if (a == INT_MAX) /* Padding is not allowed at the beginning of a 4ch block */
return -EINVAL;
- b = unbase64char(x[1]);
+ b = unbase64_next(&x, &l);
if (b < 0)
+ return b;
+ if (b == INT_MAX) /* Padding is not allowed at the second character of a 4ch block either */
return -EINVAL;
- c = unbase64char(x[2]);
+ c = unbase64_next(&x, &l);
if (c < 0)
- return -EINVAL;
+ return c;
- /* c == 00ZZZZ00 */
- if (c & 3)
- return -EINVAL;
+ d = unbase64_next(&x, &l);
+ if (d < 0)
+ return d;
- *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
- *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
+ if (c == INT_MAX) { /* Padding at the third character */
- break;
- case 2:
- a = unbase64char(x[0]);
- if (a < 0)
- return -EINVAL;
+ if (d != INT_MAX) /* If the third character is padding, the fourth must be too */
+ return -EINVAL;
- b = unbase64char(x[1]);
- if (b < 0)
- return -EINVAL;
+ /* b == 00YY0000 */
+ if (b & 15)
+ return -EINVAL;
- /* b == 00YY0000 */
- if (b & 15)
- return -EINVAL;
+ if (l > 0) /* Trailing rubbish? */
+ return -ENAMETOOLONG;
- *(z++) = (uint8_t) a << 2 | (uint8_t) (b >> 4); /* XXXXXXYY */
+ *(z++) = (uint8_t) a << 2 | (uint8_t) (b >> 4); /* XXXXXXYY */
+ break;
+ }
- break;
- case 0:
+ if (d == INT_MAX) {
+ /* c == 00ZZZZ00 */
+ if (c & 3)
+ return -EINVAL;
- break;
- default:
- return -EINVAL;
+ if (l > 0) /* Trailing rubbish? */
+ return -ENAMETOOLONG;
+
+ *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
+ *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
+ break;
+ }
+
+ *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
+ *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
+ *(z++) = (uint8_t) c << 6 | (uint8_t) d; /* ZZWWWWWW */
}
*z = 0;
- *mem = r;
- r = NULL;
- *_len = len;
+ *ret_size = (size_t) (z - buf);
+ *ret = TAKE_PTR(buf);
return 0;
}
const uint8_t *b = p;
unsigned n = 0;
- assert(s == 0 || b);
+ assert(b || s == 0);
+
+ if (!f)
+ f = stdout;
while (s > 0) {
size_t i;
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