string2key.c
1 /* 2 * Copyright (c) 1997-2003 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 "headers.h" 35 #include <getarg.h> 36 37 int version5; 38 int version4; 39 int afs; 40 char *principal; 41 char *cell; 42 char *password; 43 const char *keytype_str = "des3-cbc-sha1"; 44 int version; 45 int help; 46 47 struct getargs args[] = { 48 { "version5", '5', arg_flag, &version5, "Output Kerberos v5 string-to-key", 49 NULL }, 50 { "version4", '4', arg_flag, &version4, "Output Kerberos v4 string-to-key", 51 NULL }, 52 { "afs", 'a', arg_flag, &afs, "Output AFS string-to-key", NULL }, 53 { "cell", 'c', arg_string, &cell, "AFS cell to use", "cell" }, 54 { "password", 'w', arg_string, &password, "Password to use", "password" }, 55 { "principal",'p', arg_string, &principal, "Kerberos v5 principal to use", "principal" }, 56 { "keytype", 'k', arg_string, rk_UNCONST(&keytype_str), "Keytype", NULL }, 57 { "version", 0, arg_flag, &version, "print version", NULL }, 58 { "help", 0, arg_flag, &help, NULL, NULL } 59 }; 60 61 int num_args = sizeof(args) / sizeof(args[0]); 62 63 static void 64 usage(int status) 65 { 66 arg_printusage (args, num_args, NULL, "password"); 67 exit(status); 68 } 69 70 static void 71 tokey(krb5_context context, 72 krb5_enctype enctype, 73 const char *pw, 74 krb5_salt salt, 75 const char *label) 76 { 77 krb5_error_code ret; 78 size_t i; 79 krb5_keyblock key; 80 char *e; 81 82 ret = krb5_string_to_key_salt(context, enctype, pw, salt, &key); 83 if (ret) 84 krb5_err(context, 1, ret, "krb5_string_to_key_salt"); 85 ret = krb5_enctype_to_string(context, enctype, &e); 86 if (ret) 87 krb5_err(context, 1, ret, "krb5_enctype_to_string"); 88 printf(label, e); 89 printf(": "); 90 for(i = 0; i < key.keyvalue.length; i++) 91 printf("%02x", ((unsigned char*)key.keyvalue.data)[i]); 92 printf("\n"); 93 krb5_free_keyblock_contents(context, &key); 94 free(e); 95 } 96 97 int 98 main(int argc, char **argv) 99 { 100 krb5_context context; 101 krb5_principal princ; 102 krb5_salt salt; 103 int optidx; 104 char buf[1024]; 105 krb5_enctype etype; 106 krb5_error_code ret; 107 108 optidx = krb5_program_setup(&context, argc, argv, args, num_args, NULL); 109 110 if(help) 111 usage(0); 112 113 if(version){ 114 print_version (NULL); 115 return 0; 116 } 117 118 argc -= optidx; 119 argv += optidx; 120 121 if (argc > 1) 122 usage(1); 123 124 if(!version5 && !version4 && !afs) 125 version5 = 1; 126 127 ret = krb5_string_to_enctype(context, keytype_str, &etype); 128 if(ret) 129 krb5_err(context, 1, ret, "krb5_string_to_enctype"); 130 131 if((etype != ETYPE_DES_CBC_CRC && 132 etype != ETYPE_DES_CBC_MD4 && 133 etype != ETYPE_DES_CBC_MD5) && 134 (afs || version4)) { 135 if(!version5) { 136 etype = ETYPE_DES_CBC_CRC; 137 } else { 138 krb5_errx(context, 1, 139 "DES is the only valid keytype for AFS and Kerberos 4"); 140 } 141 } 142 143 if(version5 && principal == NULL){ 144 printf("Kerberos v5 principal: "); 145 if(fgets(buf, sizeof(buf), stdin) == NULL) 146 return 1; 147 buf[strcspn(buf, "\r\n")] = '\0'; 148 principal = estrdup(buf); 149 } 150 if(afs && cell == NULL){ 151 printf("AFS cell: "); 152 if(fgets(buf, sizeof(buf), stdin) == NULL) 153 return 1; 154 buf[strcspn(buf, "\r\n")] = '\0'; 155 cell = estrdup(buf); 156 } 157 if(argv[0]) 158 password = argv[0]; 159 if(password == NULL){ 160 if(UI_UTIL_read_pw_string(buf, sizeof(buf), "Password: ", 0)) 161 return 1; 162 password = buf; 163 } 164 165 if(version5){ 166 krb5_parse_name(context, principal, &princ); 167 krb5_get_pw_salt(context, princ, &salt); 168 tokey(context, etype, password, salt, "Kerberos 5 (%s)"); 169 krb5_free_salt(context, salt); 170 } 171 if(version4){ 172 salt.salttype = KRB5_PW_SALT; 173 salt.saltvalue.length = 0; 174 salt.saltvalue.data = NULL; 175 tokey(context, ETYPE_DES_CBC_MD5, password, salt, "Kerberos 4"); 176 } 177 if(afs){ 178 salt.salttype = KRB5_AFS3_SALT; 179 salt.saltvalue.length = strlen(cell); 180 salt.saltvalue.data = cell; 181 tokey(context, ETYPE_DES_CBC_MD5, password, salt, "AFS"); 182 } 183 return 0; 184 }