mirror of
https://github.com/Yubico/yubico-pam.git
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86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
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/*
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* Copyright (c) 2011 Yubico AB.
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* Copyright (c) 2011 Tollef Fog Heen <tfheen@err.no>
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* All rights reserved.
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*
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* Author : Fredrik Thulin <fredrik@yubico.com>
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* Author : Tollef Fog Heen <tfheen@err.no>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include "util.h"
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/* Fill buf with len bytes of random data */
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static int generate_random(char *buf, int len)
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{
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FILE *u;
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int i, res;
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u = fopen("/dev/urandom", "r");
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if (!u) {
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return -1;
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}
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res = fread(buf, 1, (size_t) len, u);
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fclose(u);
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return (res != len);
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}
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int
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get_user_cfgfile_path(const char *common_path, const char *filename, const char *username, char **fn)
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{
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/* Getting file from user home directory, i.e. ~/.yubico/challenge, or
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* from a system wide directory.
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*
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* Format is hex(challenge):hex(response):slot num
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*/
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struct passwd *p;
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char *userfile;
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if (common_path != NULL) {
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if (asprintf (&userfile, "%s/%s", common_path, filename) >= 0)
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*fn = userfile;
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return (userfile >= 0);
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}
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/* No common path provided. Construct path to user's ~/.yubico/filename */
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p = getpwnam (username);
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if (!p)
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return 0;
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if (asprintf (&userfile, "%s/.yubico/%s", p->pw_dir, filename) >= 0)
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*fn = userfile;
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return (userfile >= 0);
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}
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