700 lines
16 KiB
C
700 lines
16 KiB
C
/*
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* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 Apple Inc. All rights reserved.
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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
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* are met:
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*
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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typedef struct krb5_dcache{
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krb5_ccache fcache;
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char *dir;
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char *name;
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} krb5_dcache;
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#define DCACHE(X) ((krb5_dcache*)(X)->data.data)
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#define D2FCACHE(X) ((X)->fcache)
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static krb5_error_code KRB5_CALLCONV dcc_close(krb5_context, krb5_ccache);
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static krb5_error_code KRB5_CALLCONV dcc_get_default_name(krb5_context, char **);
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static char *
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primary_create(krb5_dcache *dc)
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{
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char *primary = NULL;
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asprintf(&primary, "%s/primary", dc->dir);
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if (primary == NULL)
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return NULL;
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return primary;
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}
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static int
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is_filename_cacheish(const char *name)
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{
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return strncmp(name, "tkt", 3) == 0;
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}
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static krb5_error_code
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set_default_cache(krb5_context context, krb5_dcache *dc, const char *residual)
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{
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char *path = NULL, *primary = NULL;
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krb5_error_code ret;
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struct iovec iov[2];
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size_t len;
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int fd = -1;
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if (!is_filename_cacheish(residual)) {
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krb5_set_error_message(context, KRB5_CC_FORMAT,
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"name %s is not a cache (doesn't start with tkt)", residual);
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return KRB5_CC_FORMAT;
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}
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asprintf(&path, "%s/primary-XXXXXX", dc->dir);
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if (path == NULL)
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return krb5_enomem(context);
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fd = mkstemp(path);
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if (fd < 0) {
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ret = errno;
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goto out;
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}
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rk_cloexec(fd);
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#ifndef _WIN32
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if (fchmod(fd, S_IRUSR | S_IWUSR) < 0) {
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ret = errno;
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goto out;
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}
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#endif
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len = strlen(residual);
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iov[0].iov_base = rk_UNCONST(residual);
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iov[0].iov_len = len;
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iov[1].iov_base = "\n";
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iov[1].iov_len = 1;
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if (writev(fd, iov, sizeof(iov)/sizeof(iov[0])) != len + 1) {
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ret = errno;
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goto out;
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}
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primary = primary_create(dc);
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if (primary == NULL) {
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ret = krb5_enomem(context);
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goto out;
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}
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if (rename(path, primary) < 0) {
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ret = errno;
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goto out;
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}
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close(fd);
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fd = -1;
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ret = 0;
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out:
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if (fd >= 0) {
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(void)unlink(path);
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close(fd);
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}
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if (path)
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free(path);
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if (primary)
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free(primary);
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return ret;
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}
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static krb5_error_code
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get_default_cache(krb5_context context, krb5_dcache *dc, char **residual)
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{
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krb5_error_code ret;
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char buf[MAXPATHLEN];
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char *primary;
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FILE *f;
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*residual = NULL;
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primary = primary_create(dc);
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if (primary == NULL)
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return krb5_enomem(context);
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f = fopen(primary, "r");
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if (f == NULL) {
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if (errno == ENOENT) {
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free(primary);
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*residual = strdup("tkt");
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if (*residual == NULL)
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return krb5_enomem(context);
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return 0;
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}
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ret = errno;
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krb5_set_error_message(context, ret, "failed to open %s", primary);
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free(primary);
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return ret;
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}
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if (fgets(buf, sizeof(buf), f) == NULL) {
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ret = ferror(f);
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fclose(f);
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krb5_set_error_message(context, ret, "read file %s", primary);
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free(primary);
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return ret;
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}
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fclose(f);
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buf[strcspn(buf, "\r\n")] = '\0';
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if (!is_filename_cacheish(buf)) {
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krb5_set_error_message(context, KRB5_CC_FORMAT,
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"name in %s is not a cache (doesn't start with tkt)", primary);
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free(primary);
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return KRB5_CC_FORMAT;
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}
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free(primary);
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*residual = strdup(buf);
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if (*residual == NULL)
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return krb5_enomem(context);
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return 0;
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}
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static const char* KRB5_CALLCONV
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dcc_get_name(krb5_context context,
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krb5_ccache id)
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{
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krb5_dcache *dc = DCACHE(id);
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return dc->name;
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}
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static krb5_error_code
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verify_directory(krb5_context context, const char *path)
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{
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struct stat sb;
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if (stat(path, &sb) != 0) {
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if (errno == ENOENT) {
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/* XXX should use mkdirx_np() */
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if (rk_mkdir(path, S_IRWXU) == 0)
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return 0;
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krb5_set_error_message(context, ENOENT,
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N_("DIR directory %s doesn't exists", ""), path);
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return ENOENT;
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} else {
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int ret = errno;
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krb5_set_error_message(context, ret,
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N_("DIR directory %s is bad: %s", ""), path, strerror(ret));
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return errno;
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}
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}
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if (!S_ISDIR(sb.st_mode)) {
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krb5_set_error_message(context, KRB5_CC_BADNAME,
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N_("DIR directory %s is not a directory", ""), path);
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return KRB5_CC_BADNAME;
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}
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return 0;
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}
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static void
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dcc_release(krb5_context context, krb5_dcache *dc)
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{
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if (dc->fcache)
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krb5_cc_close(context, dc->fcache);
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if (dc->dir)
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free(dc->dir);
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if (dc->name)
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free(dc->name);
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memset(dc, 0, sizeof(*dc));
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free(dc);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_resolve(krb5_context context, krb5_ccache *id, const char *res)
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{
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char *filename = NULL;
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krb5_error_code ret;
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krb5_dcache *dc;
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const char *p;
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p = res;
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do {
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p = strstr(p, "..");
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if (p && (p == res || ISPATHSEP(p[-1])) && (ISPATHSEP(p[2]) || p[2] == '\0')) {
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krb5_set_error_message(context, KRB5_CC_FORMAT,
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N_("Path contains a .. component", ""));
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return KRB5_CC_FORMAT;
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}
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if (p)
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p += 3;
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} while (p);
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dc = calloc(1, sizeof(*dc));
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if (dc == NULL) {
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krb5_set_error_message(context, KRB5_CC_NOMEM,
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N_("malloc: out of memory", ""));
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return KRB5_CC_NOMEM;
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}
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/* check for explicit component */
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if (res[0] == ':') {
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char *q;
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dc->dir = strdup(&res[1]);
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#ifdef _WIN32
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q = strrchr(dc->dir, '\\');
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if (q == NULL)
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#endif
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q = strrchr(dc->dir, '/');
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if (q) {
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*q++ = '\0';
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} else {
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krb5_set_error_message(context, KRB5_CC_FORMAT, N_("Cache not an absolute path: %s", ""), dc->dir);
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dcc_release(context, dc);
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return KRB5_CC_FORMAT;
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}
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if (!is_filename_cacheish(q)) {
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krb5_set_error_message(context, KRB5_CC_FORMAT,
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N_("Name %s is not a cache (doesn't start with tkt)", ""), q);
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dcc_release(context, dc);
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return KRB5_CC_FORMAT;
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}
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ret = verify_directory(context, dc->dir);
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if (ret) {
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dcc_release(context, dc);
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return ret;
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}
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dc->name = strdup(res);
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if (dc->name == NULL) {
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dcc_release(context, dc);
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return krb5_enomem(context);
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}
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} else {
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char *residual;
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size_t len;
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dc->dir = strdup(res);
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if (dc->dir == NULL) {
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dcc_release(context, dc);
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return krb5_enomem(context);
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}
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len = strlen(dc->dir);
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if (ISPATHSEP(dc->dir[len - 1]))
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dc->dir[len - 1] = '\0';
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ret = verify_directory(context, dc->dir);
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if (ret) {
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dcc_release(context, dc);
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return ret;
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}
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ret = get_default_cache(context, dc, &residual);
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if (ret) {
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dcc_release(context, dc);
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return ret;
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}
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asprintf(&dc->name, ":%s/%s", dc->dir, residual);
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free(residual);
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if (dc->name == NULL) {
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dcc_release(context, dc);
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return krb5_enomem(context);
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}
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}
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asprintf(&filename, "FILE%s", dc->name);
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if (filename == NULL) {
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dcc_release(context, dc);
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return krb5_enomem(context);
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}
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ret = krb5_cc_resolve(context, filename, &dc->fcache);
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free(filename);
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if (ret) {
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dcc_release(context, dc);
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return ret;
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}
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(*id)->data.data = dc;
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(*id)->data.length = sizeof(*dc);
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return 0;
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}
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static char *
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copy_default_dcc_cache(krb5_context context)
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{
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const char *defname;
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krb5_error_code ret;
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char *name = NULL;
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size_t len;
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len = strlen(krb5_dcc_ops.prefix);
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defname = krb5_cc_default_name(context);
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if (defname == NULL ||
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strncmp(defname, krb5_dcc_ops.prefix, len) != 0 ||
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defname[len] != ':')
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{
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ret = dcc_get_default_name(context, &name);
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if (ret)
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return NULL;
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return name;
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} else {
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return strdup(&defname[len + 1]);
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}
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_gen_new(krb5_context context, krb5_ccache *id)
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{
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krb5_error_code ret;
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char *name = NULL;
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krb5_dcache *dc;
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int fd;
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size_t len;
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name = copy_default_dcc_cache(context);
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if (name == NULL) {
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krb5_set_error_message(context, KRB5_CC_FORMAT,
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N_("Can't generate DIR caches unless its the default type", ""));
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return KRB5_CC_FORMAT;
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}
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len = strlen(krb5_dcc_ops.prefix);
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if (strncmp(name, krb5_dcc_ops.prefix, len) == 0 && name[len] == ':')
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++len;
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else
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len = 0;
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ret = dcc_resolve(context, id, name + len);
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free(name);
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name = NULL;
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if (ret)
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return ret;
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dc = DCACHE((*id));
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asprintf(&name, ":%s/tktXXXXXX", dc->dir);
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if (name == NULL) {
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dcc_close(context, *id);
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return krb5_enomem(context);
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}
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fd = mkstemp(&name[1]);
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if (fd < 0) {
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dcc_close(context, *id);
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return krb5_enomem(context);
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}
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close(fd);
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free(dc->name);
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dc->name = name;
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_initialize(krb5_context context,
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krb5_ccache id,
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krb5_principal primary_principal)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_initialize(context, D2FCACHE(dc), primary_principal);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_close(krb5_context context,
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krb5_ccache id)
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{
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dcc_release(context, DCACHE(id));
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_destroy(krb5_context context,
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krb5_ccache id)
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{
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krb5_dcache *dc = DCACHE(id);
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krb5_ccache fcache = D2FCACHE(dc);
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dc->fcache = NULL;
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return krb5_cc_destroy(context, fcache);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_store_cred(krb5_context context,
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krb5_ccache id,
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krb5_creds *creds)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_store_cred(context, D2FCACHE(dc), creds);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_get_principal(krb5_context context,
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krb5_ccache id,
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krb5_principal *principal)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_get_principal(context, D2FCACHE(dc), principal);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_get_first (krb5_context context,
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krb5_ccache id,
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krb5_cc_cursor *cursor)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_start_seq_get(context, D2FCACHE(dc), cursor);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_get_next (krb5_context context,
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krb5_ccache id,
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krb5_cc_cursor *cursor,
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krb5_creds *creds)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_next_cred(context, D2FCACHE(dc), cursor, creds);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_end_get (krb5_context context,
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krb5_ccache id,
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krb5_cc_cursor *cursor)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_end_seq_get(context, D2FCACHE(dc), cursor);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_remove_cred(krb5_context context,
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krb5_ccache id,
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krb5_flags which,
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krb5_creds *cred)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_remove_cred(context, D2FCACHE(dc), which, cred);
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}
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static krb5_error_code KRB5_CALLCONV
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dcc_set_flags(krb5_context context,
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krb5_ccache id,
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krb5_flags flags)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_set_flags(context, D2FCACHE(dc), flags);
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}
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static int KRB5_CALLCONV
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dcc_get_version(krb5_context context,
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krb5_ccache id)
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{
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krb5_dcache *dc = DCACHE(id);
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return krb5_cc_get_version(context, D2FCACHE(dc));
|
|
}
|
|
|
|
struct dcache_iter {
|
|
int first;
|
|
krb5_dcache *dc;
|
|
};
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_get_cache_first(krb5_context context, krb5_cc_cursor *cursor)
|
|
{
|
|
struct dcache_iter *iter;
|
|
krb5_error_code ret;
|
|
char *name;
|
|
|
|
*cursor = NULL;
|
|
iter = calloc(1, sizeof(*iter));
|
|
if (iter == NULL)
|
|
return krb5_enomem(context);
|
|
iter->first = 1;
|
|
|
|
name = copy_default_dcc_cache(context);
|
|
if (name == NULL) {
|
|
free(iter);
|
|
krb5_set_error_message(context, KRB5_CC_FORMAT,
|
|
N_("Can't generate DIR caches unless its the default type", ""));
|
|
return KRB5_CC_FORMAT;
|
|
}
|
|
|
|
ret = dcc_resolve(context, NULL, name);
|
|
free(name);
|
|
if (ret) {
|
|
free(iter);
|
|
return ret;
|
|
}
|
|
|
|
/* XXX We need to opendir() here */
|
|
|
|
*cursor = iter;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_get_cache_next(krb5_context context, krb5_cc_cursor cursor, krb5_ccache *id)
|
|
{
|
|
struct dcache_iter *iter = cursor;
|
|
|
|
if (iter == NULL)
|
|
return krb5_einval(context, 2);
|
|
|
|
if (!iter->first) {
|
|
krb5_clear_error_message(context);
|
|
return KRB5_CC_END;
|
|
}
|
|
|
|
/* XXX We need to readdir() here */
|
|
iter->first = 0;
|
|
|
|
return KRB5_CC_END;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_end_cache_get(krb5_context context, krb5_cc_cursor cursor)
|
|
{
|
|
struct dcache_iter *iter = cursor;
|
|
|
|
if (iter == NULL)
|
|
return krb5_einval(context, 2);
|
|
|
|
/* XXX We need to closedir() here */
|
|
if (iter->dc)
|
|
dcc_release(context, iter->dc);
|
|
free(iter);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_move(krb5_context context, krb5_ccache from, krb5_ccache to)
|
|
{
|
|
krb5_dcache *dcfrom = DCACHE(from);
|
|
krb5_dcache *dcto = DCACHE(to);
|
|
return krb5_cc_move(context, D2FCACHE(dcfrom), D2FCACHE(dcto));
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_get_default_name(krb5_context context, char **str)
|
|
{
|
|
return _krb5_expand_default_cc_name(context,
|
|
KRB5_DEFAULT_CCNAME_DIR,
|
|
str);
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_set_default(krb5_context context, krb5_ccache id)
|
|
{
|
|
krb5_dcache *dc = DCACHE(id);
|
|
const char *name;
|
|
|
|
name = krb5_cc_get_name(context, D2FCACHE(dc));
|
|
if (name == NULL)
|
|
return ENOENT;
|
|
|
|
return set_default_cache(context, dc, name);
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_lastchange(krb5_context context, krb5_ccache id, krb5_timestamp *mtime)
|
|
{
|
|
krb5_dcache *dc = DCACHE(id);
|
|
return krb5_cc_last_change_time(context, D2FCACHE(dc), mtime);
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_set_kdc_offset(krb5_context context, krb5_ccache id, krb5_deltat kdc_offset)
|
|
{
|
|
krb5_dcache *dc = DCACHE(id);
|
|
return krb5_cc_set_kdc_offset(context, D2FCACHE(dc), kdc_offset);
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
dcc_get_kdc_offset(krb5_context context, krb5_ccache id, krb5_deltat *kdc_offset)
|
|
{
|
|
krb5_dcache *dc = DCACHE(id);
|
|
return krb5_cc_get_kdc_offset(context, D2FCACHE(dc), kdc_offset);
|
|
}
|
|
|
|
|
|
/**
|
|
* Variable containing the DIR based credential cache implemention.
|
|
*
|
|
* @ingroup krb5_ccache
|
|
*/
|
|
|
|
KRB5_LIB_VARIABLE const krb5_cc_ops krb5_dcc_ops = {
|
|
KRB5_CC_OPS_VERSION,
|
|
"DIR",
|
|
dcc_get_name,
|
|
dcc_resolve,
|
|
dcc_gen_new,
|
|
dcc_initialize,
|
|
dcc_destroy,
|
|
dcc_close,
|
|
dcc_store_cred,
|
|
NULL, /* dcc_retrieve */
|
|
dcc_get_principal,
|
|
dcc_get_first,
|
|
dcc_get_next,
|
|
dcc_end_get,
|
|
dcc_remove_cred,
|
|
dcc_set_flags,
|
|
dcc_get_version,
|
|
dcc_get_cache_first,
|
|
dcc_get_cache_next,
|
|
dcc_end_cache_get,
|
|
dcc_move,
|
|
dcc_get_default_name,
|
|
dcc_set_default,
|
|
dcc_lastchange,
|
|
dcc_set_kdc_offset,
|
|
dcc_get_kdc_offset
|
|
};
|