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/*
* Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <ctype.h>
#include <string.h>
#include "got_reference.h"
#include "got_lib_lockfile.h"
#ifndef nitems
#define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
#endif
int
got_ref_name_is_valid(const char *name)
{
const char *s, *seg;
const char forbidden[] = { ' ', '~', '^', ':', '?', '*', '[' , '\\' };
const char *forbidden_seq[] = { "//", "..", "@{" };
const char *lfs = GOT_LOCKFILE_SUFFIX;
const size_t lfs_len = sizeof(GOT_LOCKFILE_SUFFIX) - 1;
size_t i;
if (name[0] == '@' && name[1] == '\0')
return 0;
s = name;
seg = s;
if (seg[0] == '\0' || seg[0] == '.' || seg[0] == '/')
return 0;
while (*s) {
for (i = 0; i < nitems(forbidden); i++) {
if (*s == forbidden[i])
return 0;
}
for (i = 0; i < nitems(forbidden_seq); i++) {
if (s[0] == forbidden_seq[i][0] &&
s[1] == forbidden_seq[i][1])
return 0;
}
if (iscntrl((unsigned char)s[0]))
return 0;
if (s[0] == '.' && s[1] == '\0')
return 0;
if (*s == '/') {
const char *nextseg = s + 1;
if (nextseg[0] == '\0' || nextseg[0] == '.' ||
nextseg[0] == '/')
return 0;
if (seg <= s - lfs_len &&
strncmp(s - lfs_len, lfs, lfs_len) == 0)
return 0;
seg = nextseg;
}
s++;
}
if (seg <= s - lfs_len &&
strncmp(s - lfs_len, lfs, lfs_len) == 0)
return 0;
return 1;
}
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