kswitch.c
1 /* 2 * Copyright (c) 2008 - 2010 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "kuser_locl.h" 35 #include "kcc-commands.h" 36 37 #ifdef HAVE_READLINE 38 char *readline(const char *prompt); 39 #else 40 41 static char * 42 readline(const char *prompt) 43 { 44 char buf[BUFSIZ]; 45 printf ("%s", prompt); 46 fflush (stdout); 47 if(fgets(buf, sizeof(buf), stdin) == NULL) 48 return NULL; 49 buf[strcspn(buf, "\r\n")] = '\0'; 50 return strdup(buf); 51 } 52 53 #endif 54 55 /* 56 * 57 */ 58 59 int 60 kswitch(struct kswitch_options *opt, int argc, char **argv) 61 { 62 krb5_error_code ret; 63 krb5_ccache id = NULL; 64 65 if(opt->version_flag) { 66 print_version(NULL); 67 exit(0); 68 } 69 70 if (opt->cache_string && opt->principal_string) 71 krb5_errx(kcc_context, 1, 72 N_("Both --cache and --principal given, choose one", "")); 73 74 if (opt->interactive_flag) { 75 krb5_cc_cache_cursor cursor; 76 krb5_ccache *ids = NULL; 77 size_t i, len = 0; 78 char *name; 79 rtbl_t ct; 80 81 ct = rtbl_create(); 82 83 rtbl_add_column_by_id(ct, 0, "#", 0); 84 rtbl_add_column_by_id(ct, 1, "Principal", 0); 85 rtbl_set_column_affix_by_id(ct, 1, " ", ""); 86 rtbl_add_column_by_id(ct, 2, "Type", 0); 87 rtbl_set_column_affix_by_id(ct, 2, " ", ""); 88 89 ret = krb5_cc_cache_get_first(kcc_context, NULL, &cursor); 90 if (ret) 91 krb5_err(kcc_context, 1, ret, "krb5_cc_cache_get_first"); 92 93 while (krb5_cc_cache_next(kcc_context, cursor, &id) == 0) { 94 krb5_principal p; 95 char num[10]; 96 97 ret = krb5_cc_get_principal(kcc_context, id, &p); 98 if (ret) 99 continue; 100 101 ret = krb5_unparse_name(kcc_context, p, &name); 102 krb5_free_principal(kcc_context, p); 103 if (ret) 104 continue; 105 106 snprintf(num, sizeof(num), "%d", (int)(len + 1)); 107 rtbl_add_column_entry_by_id(ct, 0, num); 108 rtbl_add_column_entry_by_id(ct, 1, name); 109 rtbl_add_column_entry_by_id(ct, 2, krb5_cc_get_type(kcc_context, id)); 110 free(name); 111 112 ids = erealloc(ids, (len + 1) * sizeof(ids[0])); 113 ids[len] = id; 114 len++; 115 } 116 krb5_cc_cache_end_seq_get(kcc_context, cursor); 117 118 rtbl_format(ct, stdout); 119 rtbl_destroy(ct); 120 121 name = readline("Select number: "); 122 if (name) { 123 i = atoi(name); 124 if (i == 0) 125 krb5_errx(kcc_context, 1, "Cache number '%s' is invalid", name); 126 if (i > len) 127 krb5_errx(kcc_context, 1, "Cache number '%s' is too large", name); 128 129 id = ids[i - 1]; 130 ids[i - 1] = NULL; 131 } else 132 krb5_errx(kcc_context, 1, "No cache selected"); 133 for (i = 0; i < len; i++) 134 if (ids[i]) 135 krb5_cc_close(kcc_context, ids[i]); 136 137 } else if (opt->principal_string) { 138 krb5_principal p; 139 140 ret = krb5_parse_name(kcc_context, opt->principal_string, &p); 141 if (ret) 142 krb5_err(kcc_context, 1, ret, "krb5_parse_name: %s", 143 opt->principal_string); 144 145 ret = krb5_cc_cache_match(kcc_context, p, &id); 146 if (ret) 147 krb5_err(kcc_context, 1, ret, 148 N_("Did not find principal: %s", ""), 149 opt->principal_string); 150 151 krb5_free_principal(kcc_context, p); 152 153 } else if (opt->cache_string) { 154 const krb5_cc_ops *ops; 155 char *str, *str2 = NULL; 156 157 ops = krb5_cc_get_prefix_ops(kcc_context, opt->cache_string); 158 if (ops == NULL) { 159 ops = krb5_cc_get_prefix_ops(kcc_context, opt->type_string); 160 if (ops == NULL) 161 krb5_err(kcc_context, 1, 0, "krb5_cc_get_prefix_ops"); 162 163 asprintf(&str2, "%s:%s", ops->prefix, opt->cache_string); 164 if (str2 == NULL) 165 krb5_errx(kcc_context, 1, N_("out of memory", "")); 166 str = str2; 167 } else { 168 str = opt->cache_string; 169 } 170 171 ret = krb5_cc_resolve(kcc_context, str, &id); 172 if (ret) 173 krb5_err(kcc_context, 1, ret, "krb5_cc_resolve: %s", str); 174 175 if (str2) 176 free(str2); 177 } else { 178 krb5_errx(kcc_context, 1, "missing option for kswitch"); 179 } 180 181 ret = krb5_cc_switch(kcc_context, id); 182 if (ret) 183 krb5_err(kcc_context, 1, ret, "krb5_cc_switch"); 184 185 return 0; 186 }