1178825Sdfr/* 2178825Sdfr * Copyright (c) 2005, PADL Software Pty Ltd. 3178825Sdfr * All rights reserved. 4178825Sdfr * 5233294Sstas * Portions Copyright (c) 2009 Apple Inc. All rights reserved. 6233294Sstas * 7178825Sdfr * Redistribution and use in source and binary forms, with or without 8178825Sdfr * modification, are permitted provided that the following conditions 9178825Sdfr * are met: 10178825Sdfr * 11178825Sdfr * 1. Redistributions of source code must retain the above copyright 12178825Sdfr * notice, this list of conditions and the following disclaimer. 13178825Sdfr * 14178825Sdfr * 2. Redistributions in binary form must reproduce the above copyright 15178825Sdfr * notice, this list of conditions and the following disclaimer in the 16178825Sdfr * documentation and/or other materials provided with the distribution. 17178825Sdfr * 18178825Sdfr * 3. Neither the name of PADL Software nor the names of its contributors 19178825Sdfr * may be used to endorse or promote products derived from this software 20178825Sdfr * without specific prior written permission. 21178825Sdfr * 22178825Sdfr * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND 23178825Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24178825Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25178825Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE 26178825Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27178825Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28178825Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29178825Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30178825Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31178825Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32178825Sdfr * SUCH DAMAGE. 33178825Sdfr */ 34178825Sdfr 35178825Sdfr#include "kcm_locl.h" 36178825Sdfr#include <pwd.h> 37178825Sdfr 38178825Sdfrkrb5_error_code 39178825Sdfrkcm_ccache_resolve_client(krb5_context context, 40178825Sdfr kcm_client *client, 41178825Sdfr kcm_operation opcode, 42178825Sdfr const char *name, 43178825Sdfr kcm_ccache *ccache) 44178825Sdfr{ 45178825Sdfr krb5_error_code ret; 46178825Sdfr 47178825Sdfr ret = kcm_ccache_resolve(context, name, ccache); 48178825Sdfr if (ret) { 49178825Sdfr kcm_log(1, "Failed to resolve cache %s: %s", 50178825Sdfr name, krb5_get_err_text(context, ret)); 51178825Sdfr return ret; 52178825Sdfr } 53178825Sdfr 54178825Sdfr ret = kcm_access(context, client, opcode, *ccache); 55178825Sdfr if (ret) { 56178825Sdfr ret = KRB5_FCC_NOFILE; /* don't disclose */ 57233294Sstas kcm_release_ccache(context, *ccache); 58178825Sdfr } 59178825Sdfr 60178825Sdfr return ret; 61178825Sdfr} 62178825Sdfr 63178825Sdfrkrb5_error_code 64178825Sdfrkcm_ccache_destroy_client(krb5_context context, 65178825Sdfr kcm_client *client, 66178825Sdfr const char *name) 67178825Sdfr{ 68178825Sdfr krb5_error_code ret; 69178825Sdfr kcm_ccache ccache; 70178825Sdfr 71178825Sdfr ret = kcm_ccache_resolve(context, name, &ccache); 72178825Sdfr if (ret) { 73178825Sdfr kcm_log(1, "Failed to resolve cache %s: %s", 74178825Sdfr name, krb5_get_err_text(context, ret)); 75178825Sdfr return ret; 76178825Sdfr } 77178825Sdfr 78178825Sdfr ret = kcm_access(context, client, KCM_OP_DESTROY, ccache); 79233294Sstas kcm_cleanup_events(context, ccache); 80233294Sstas kcm_release_ccache(context, ccache); 81233294Sstas if (ret) 82178825Sdfr return ret; 83178825Sdfr 84233294Sstas return kcm_ccache_destroy(context, name); 85178825Sdfr} 86178825Sdfr 87178825Sdfrkrb5_error_code 88178825Sdfrkcm_ccache_new_client(krb5_context context, 89178825Sdfr kcm_client *client, 90178825Sdfr const char *name, 91178825Sdfr kcm_ccache *ccache_p) 92178825Sdfr{ 93178825Sdfr krb5_error_code ret; 94178825Sdfr kcm_ccache ccache; 95178825Sdfr 96178825Sdfr /* We insist the ccache name starts with UID or UID: */ 97178825Sdfr if (name_constraints != 0) { 98178825Sdfr char prefix[64]; 99178825Sdfr size_t prefix_len; 100178825Sdfr int bad = 1; 101178825Sdfr 102178825Sdfr snprintf(prefix, sizeof(prefix), "%ld:", (long)client->uid); 103178825Sdfr prefix_len = strlen(prefix); 104178825Sdfr 105178825Sdfr if (strncmp(name, prefix, prefix_len) == 0) 106178825Sdfr bad = 0; 107178825Sdfr else { 108178825Sdfr prefix[prefix_len - 1] = '\0'; 109178825Sdfr if (strcmp(name, prefix) == 0) 110178825Sdfr bad = 0; 111178825Sdfr } 112178825Sdfr 113178825Sdfr /* Allow root to create badly-named ccaches */ 114178825Sdfr if (bad && !CLIENT_IS_ROOT(client)) 115178825Sdfr return KRB5_CC_BADNAME; 116178825Sdfr } 117233294Sstas 118178825Sdfr ret = kcm_ccache_resolve(context, name, &ccache); 119178825Sdfr if (ret == 0) { 120178825Sdfr if ((ccache->uid != client->uid || 121178825Sdfr ccache->gid != client->gid) && !CLIENT_IS_ROOT(client)) 122178825Sdfr return KRB5_FCC_PERM; 123178825Sdfr } else if (ret != KRB5_FCC_NOFILE && !(CLIENT_IS_ROOT(client) && ret == KRB5_FCC_PERM)) { 124178825Sdfr return ret; 125178825Sdfr } 126178825Sdfr 127178825Sdfr if (ret == KRB5_FCC_NOFILE) { 128178825Sdfr ret = kcm_ccache_new(context, name, &ccache); 129178825Sdfr if (ret) { 130178825Sdfr kcm_log(1, "Failed to initialize cache %s: %s", 131178825Sdfr name, krb5_get_err_text(context, ret)); 132178825Sdfr return ret; 133178825Sdfr } 134178825Sdfr 135178825Sdfr /* bind to current client */ 136178825Sdfr ccache->uid = client->uid; 137178825Sdfr ccache->gid = client->gid; 138233294Sstas ccache->session = client->session; 139178825Sdfr } else { 140178825Sdfr ret = kcm_zero_ccache_data(context, ccache); 141178825Sdfr if (ret) { 142178825Sdfr kcm_log(1, "Failed to empty cache %s: %s", 143178825Sdfr name, krb5_get_err_text(context, ret)); 144233294Sstas kcm_release_ccache(context, ccache); 145178825Sdfr return ret; 146178825Sdfr } 147178825Sdfr kcm_cleanup_events(context, ccache); 148178825Sdfr } 149178825Sdfr 150178825Sdfr ret = kcm_access(context, client, KCM_OP_INITIALIZE, ccache); 151178825Sdfr if (ret) { 152233294Sstas kcm_release_ccache(context, ccache); 153178825Sdfr kcm_ccache_destroy(context, name); 154178825Sdfr return ret; 155178825Sdfr } 156178825Sdfr 157233294Sstas /* 158178825Sdfr * Finally, if the user is root and the cache was created under 159178825Sdfr * another user's name, chown the cache to that user and their 160178825Sdfr * default gid. 161178825Sdfr */ 162178825Sdfr if (CLIENT_IS_ROOT(client)) { 163178825Sdfr unsigned long uid; 164178825Sdfr int matches = sscanf(name,"%ld:",&uid); 165178825Sdfr if (matches == 0) 166178825Sdfr matches = sscanf(name,"%ld",&uid); 167178825Sdfr if (matches == 1) { 168178825Sdfr struct passwd *pwd = getpwuid(uid); 169178825Sdfr if (pwd != NULL) { 170178825Sdfr gid_t gid = pwd->pw_gid; 171178825Sdfr kcm_chown(context, client, ccache, uid, gid); 172178825Sdfr } 173178825Sdfr } 174178825Sdfr } 175233294Sstas 176178825Sdfr *ccache_p = ccache; 177178825Sdfr return 0; 178178825Sdfr} 179178825Sdfr 180