1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 7 /* 8 * Copyright2001 by the Massachusetts Institute of Technology. 9 * Copyright 1993 by OpenVision Technologies, Inc. 10 * 11 * Permission to use, copy, modify, distribute, and sell this software 12 * and its documentation for any purpose is hereby granted without fee, 13 * provided that the above copyright notice appears in all copies and 14 * that both that copyright notice and this permission notice appear in 15 * supporting documentation, and that the name of OpenVision not be used 16 * in advertising or publicity pertaining to distribution of the software 17 * without specific, written prior permission. OpenVision makes no 18 * representations about the suitability of this software for any 19 * purpose. It is provided "as is" without express or implied warranty. 20 * 21 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 22 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 23 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR 24 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF 25 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 26 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 27 * PERFORMANCE OF THIS SOFTWARE. 28 */ 29 30 /* 31 * Copyright (C) 1998 by the FundsXpress, INC. 32 * 33 * All rights reserved. 34 * 35 * Export of this software from the United States of America may require 36 * a specific license from the United States Government. It is the 37 * responsibility of any person or organization contemplating export to 38 * obtain such a license before exporting. 39 * 40 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 41 * distribute this software and its documentation for any purpose and 42 * without fee is hereby granted, provided that the above copyright 43 * notice appear in all copies and that both that copyright notice and 44 * this permission notice appear in supporting documentation, and that 45 * the name of FundsXpress. not be used in advertising or publicity pertaining 46 * to distribution of the software without specific, written prior 47 * permission. FundsXpress makes no representations about the suitability of 48 * this software for any purpose. It is provided "as is" without express 49 * or implied warranty. 50 * 51 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 53 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 54 */ 55 56 /* Solaris Kerberos: order is important here. include gssapiP_krb5.h 57 * before all others, otherwise we get a LINT error from MALLOC macro 58 * being redefined in mechglueP.h */ 59 #include <gssapiP_krb5.h> 60 #include <k5-int.h> 61 62 /* Solaris Kerberos defines memory management macros in <krb5.h> */ 63 /* #include <memory.h> */ 64 65 /* 66 * $Id: util_crypt.c,v 1.11.6.3 2000/06/03 06:09:45 tlyu Exp $ 67 */ 68 69 int 70 kg_confounder_size(context, key) 71 krb5_context context; 72 krb5_keyblock *key; 73 { 74 krb5_error_code code; 75 size_t blocksize; 76 /* We special case rc4*/ 77 if (key->enctype == ENCTYPE_ARCFOUR_HMAC) 78 return 8; 79 code = krb5_c_block_size(context, key->enctype, &blocksize); 80 if (code) 81 return(-1); /* XXX */ 82 83 return(blocksize); 84 } 85 86 krb5_error_code 87 kg_make_confounder(context, key, buf) 88 krb5_context context; 89 krb5_keyblock *key; 90 unsigned char *buf; 91 { 92 krb5_error_code code; 93 size_t blocksize; 94 krb5_data lrandom; 95 96 code = krb5_c_block_size(context, key->enctype, &blocksize); 97 if (code) 98 return(code); 99 100 lrandom.length = blocksize; 101 lrandom.data = (char *) buf; 102 103 return(krb5_c_random_make_octets(context, &lrandom)); 104 } 105 106 int 107 kg_encrypt_size(context, key, n) 108 krb5_context context; 109 krb5_keyblock *key; 110 int n; 111 { 112 size_t enclen; 113 114 if (krb5_c_encrypt_length(context, key->enctype, n, &enclen) != 0) 115 return(-1); /* XXX */ 116 117 return(enclen); 118 } 119 120 krb5_error_code 121 kg_encrypt(context, key, usage, iv, in, out, length) 122 krb5_context context; 123 krb5_keyblock *key; 124 int usage; 125 krb5_pointer iv; 126 krb5_const_pointer in; 127 krb5_pointer out; 128 unsigned int length; 129 { 130 krb5_error_code code; 131 size_t blocksize; 132 krb5_data ivd, *pivd, inputd; 133 krb5_enc_data outputd; 134 135 KRB5_LOG0(KRB5_INFO, "kg_encrypt() start."); 136 137 if (iv) { 138 code = krb5_c_block_size(context, key->enctype, &blocksize); 139 if (code) 140 return(code); 141 142 ivd.length = blocksize; 143 ivd.data = MALLOC(ivd.length); 144 if (ivd.data == NULL) 145 return ENOMEM; 146 (void) memcpy(ivd.data, iv, ivd.length); 147 pivd = &ivd; 148 } else { 149 pivd = NULL; 150 } 151 152 inputd.length = length; 153 inputd.data = (char *)in; /* Solaris Kerberos */ 154 155 outputd.ciphertext.length = length; 156 outputd.ciphertext.data = out; 157 158 code = krb5_c_encrypt(context, key, usage, pivd, &inputd, &outputd); 159 if (pivd != NULL) 160 krb5_free_data_contents(context, pivd); 161 162 KRB5_LOG(KRB5_INFO, "kg_encrypt() end. code = %d", code); 163 return code; 164 } 165 166 /* length is the length of the cleartext. */ 167 168 krb5_error_code 169 kg_decrypt(context, key, usage, iv, in, out, length) 170 krb5_context context; 171 krb5_keyblock *key; 172 int usage; 173 krb5_pointer iv; 174 krb5_const_pointer in; 175 krb5_pointer out; 176 unsigned int length; 177 { 178 krb5_error_code code; 179 size_t blocksize; 180 krb5_data ivd, *pivd, outputd; 181 krb5_enc_data inputd; 182 KRB5_LOG0(KRB5_INFO, "kg_decrypt() start."); 183 184 if (iv) { 185 code = krb5_c_block_size(context, key->enctype, &blocksize); 186 if (code) 187 return(code); 188 189 ivd.length = blocksize; 190 ivd.data = MALLOC(ivd.length); 191 if (ivd.data == NULL) 192 return ENOMEM; 193 (void) memcpy(ivd.data, iv, ivd.length); 194 pivd = &ivd; 195 } else { 196 pivd = NULL; 197 } 198 199 inputd.enctype = ENCTYPE_UNKNOWN; 200 inputd.ciphertext.length = length; 201 inputd.ciphertext.data = (char *)in; /* Solaris Kerberos */ 202 203 outputd.length = length; 204 outputd.data = out; 205 206 code = krb5_c_decrypt(context, key, usage, pivd, &inputd, &outputd); 207 if (pivd != NULL) 208 krb5_free_data_contents(context, pivd); 209 210 KRB5_LOG(KRB5_INFO, "kg_decrypt() end. code = %d", code); 211 return code; 212 } 213 214 krb5_error_code 215 kg_arcfour_docrypt (krb5_context context, 216 const krb5_keyblock *longterm_key , int ms_usage, 217 const unsigned char *kd_data, size_t kd_data_len, 218 const unsigned char *input_buf, size_t input_len, 219 unsigned char *output_buf) 220 { 221 krb5_error_code code; 222 krb5_data input, output; 223 krb5_keyblock seq_enc_key, usage_key; 224 unsigned char t[4]; 225 226 KRB5_LOG0(KRB5_INFO, "kg_arcfour_docrypt() start"); 227 228 bzero(&usage_key, sizeof(krb5_keyblock)); 229 bzero(&seq_enc_key, sizeof(krb5_keyblock)); 230 231 usage_key.length = longterm_key->length; 232 usage_key.contents = MALLOC(usage_key.length); 233 usage_key.enctype = longterm_key->enctype; 234 usage_key.dk_list = NULL; 235 #ifdef _KERNEL 236 237 usage_key.kef_mt = longterm_key->kef_mt; 238 code = init_key_kef(longterm_key->kef_mt, &usage_key); 239 if (code) 240 return (code); 241 #endif /* _KERNEL */ 242 if (usage_key.contents == NULL) 243 return (ENOMEM); 244 seq_enc_key.length = longterm_key->length; 245 seq_enc_key.contents = MALLOC(seq_enc_key.length); 246 seq_enc_key.enctype = longterm_key->enctype; 247 seq_enc_key.dk_list = NULL; 248 #ifdef _KERNEL 249 seq_enc_key.kef_mt = longterm_key->kef_mt; 250 code = init_key_kef(longterm_key->kef_mt, &seq_enc_key); 251 if (code) 252 return (code); 253 #endif /* _KERNEL */ 254 if (seq_enc_key.contents == NULL) { 255 FREE ((void *) usage_key.contents, usage_key.length); 256 return (ENOMEM); 257 } 258 259 t[0] = ms_usage &0xff; 260 t[1] = (ms_usage>>8) & 0xff; 261 t[2] = (ms_usage>>16) & 0xff; 262 t[3] = (ms_usage>>24) & 0xff; 263 input.data = (void *) &t; 264 input.length = 4; 265 output.data = (void *) usage_key.contents; 266 output.length = usage_key.length; 267 #ifdef _KERNEL 268 code = krb5_hmac(context, longterm_key, &input, &output); 269 #else 270 code = krb5_hmac(context, &krb5int_hash_md5, 271 longterm_key, 1, &input, &output); 272 #endif /* _KERNEL */ 273 if (code) 274 goto cleanup_arcfour; 275 276 input.data = ( void *) kd_data; 277 input.length = kd_data_len; 278 output.data = (void *) seq_enc_key.contents; 279 #ifdef _KERNEL 280 code = krb5_hmac(context, &usage_key, &input, &output); 281 #else 282 code = krb5_hmac(context, &krb5int_hash_md5, 283 &usage_key, 1, &input, &output); 284 #endif /* _KERNEL */ 285 286 if (code) 287 goto cleanup_arcfour; 288 input.data = ( void * ) input_buf; 289 input.length = input_len; 290 output.data = (void * ) output_buf; 291 output.length = input_len; 292 293 /* 294 * Call the arcfour encryption method directly here, we cannot 295 * use the standard "krb5_c_encrypt" interface because we just 296 * want the arcfour algorithm applied and not the additional MD5-HMAC 297 * which are applied when using the standard interface. 298 */ 299 code = krb5int_enc_arcfour.encrypt(context, &seq_enc_key, 0, &input, &output); 300 301 cleanup_arcfour: 302 bzero ((void *) seq_enc_key.contents, seq_enc_key.length); 303 bzero ((void *) usage_key.contents, usage_key.length); 304 FREE ((void *) usage_key.contents, usage_key.length); 305 FREE ((void *) seq_enc_key.contents, seq_enc_key.length); 306 307 KRB5_LOG(KRB5_INFO, "kg_arcfour_docrypt() end code = %d", code); 308 return (code); 309 } 310 311