lib/krb5/mit_glue.c

   1 /*
   2  * Copyright (c) 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 "krb5_locl.h"
  35 RCSID("$Id$");
  36
  37 /*
  38  * Glue for MIT API
  39  */
  40
  41 krb5_error_code KRB5_LIB_FUNCTION
  42 krb5_c_make_checksum(krb5_context context,
  43                      krb5_cksumtype cksumtype,
  44                      const krb5_keyblock *key,
  45                      krb5_keyusage usage,
  46                      const krb5_data *input,
  47                      krb5_checksum *cksum)
  48 {
  49     krb5_error_code ret;
  50     krb5_crypto crypto;
  51
  52     ret = krb5_crypto_init(context, key, 0, &crypto);
  53     if (ret)
  54         return ret;
  55
  56     ret = krb5_create_checksum(context, crypto,  usage, cksumtype,
  57                                input->data, input->length, cksum);
  58     krb5_crypto_destroy(context, crypto);
  59
  60     return ret ;
  61 }
  62
  63 krb5_error_code KRB5_LIB_FUNCTION
  64 krb5_c_verify_checksum(krb5_context context, const krb5_keyblock *key,
  65                        krb5_keyusage usage, const krb5_data *data,
  66                        const krb5_checksum *cksum, krb5_boolean *valid)
  67 {
  68     krb5_error_code ret;
  69     krb5_checksum data_cksum;
  70
  71     *valid = 0;
  72
  73     ret = krb5_c_make_checksum(context, cksum->cksumtype,
  74                                key, usage, data, &data_cksum);
  75     if (ret)
  76         return ret;
  77
  78     if (data_cksum.cksumtype == cksum->cksumtype
  79         && data_cksum.checksum.length == cksum->checksum.length
  80         && memcmp(data_cksum.checksum.data, cksum->checksum.data, cksum->checksum.length) == 0)
  81         *valid = 1;
  82
  83     krb5_free_checksum_contents(context, &data_cksum);
  84
  85     return 0;
  86 }
  87
  88 krb5_error_code KRB5_LIB_FUNCTION
  89 krb5_c_get_checksum(krb5_context context, const krb5_checksum *cksum,
  90                     krb5_cksumtype *type, krb5_data **data)
  91 {
  92     krb5_error_code ret;
  93
  94     if (type)
  95         *type = cksum->cksumtype;
  96     if (data) {
  97         *data = malloc(sizeof(**data));
  98         if (*data == NULL)
  99             return ENOMEM;
 100
 101         ret = der_copy_octet_string(&cksum->checksum, *data);
 102         if (ret) {
 103             free(*data);
 104             *data = NULL;
 105             return ret;
 106         }
 107     }
 108     return 0;
 109 }
 110
 111 krb5_error_code KRB5_LIB_FUNCTION
 112 krb5_c_set_checksum(krb5_context context, krb5_checksum *cksum,
 113                     krb5_cksumtype type, const krb5_data *data)
 114 {
 115     cksum->cksumtype = type;
 116     return der_copy_octet_string(data, &cksum->checksum);
 117 }
 118
 119 void KRB5_LIB_FUNCTION
 120 krb5_free_checksum (krb5_context context, krb5_checksum *cksum)
 121 {
 122     krb5_checksum_free(context, cksum);
 123     free(cksum);
 124 }
 125
 126 void KRB5_LIB_FUNCTION
 127 krb5_free_checksum_contents(krb5_context context, krb5_checksum *cksum)
 128 {
 129     krb5_checksum_free(context, cksum);
 130     memset(cksum, 0, sizeof(*cksum));
 131 }
 132
 133 void KRB5_LIB_FUNCTION
 134 krb5_checksum_free(krb5_context context, krb5_checksum *cksum)
 135 {
 136     free_Checksum(cksum);
 137 }
 138
 139 krb5_boolean KRB5_LIB_FUNCTION
 140 krb5_c_valid_enctype (krb5_enctype etype)
 141 {
 142     return krb5_enctype_valid(NULL, etype);
 143 }
 144
 145 krb5_boolean KRB5_LIB_FUNCTION
 146 krb5_c_valid_cksumtype(krb5_cksumtype ctype)
 147 {
 148     return krb5_cksumtype_valid(NULL, ctype);
 149 }
 150
 151 krb5_boolean KRB5_LIB_FUNCTION
 152 krb5_c_is_coll_proof_cksum(krb5_cksumtype ctype)
 153 {
 154     return krb5_checksum_is_collision_proof(NULL, ctype);
 155 }
 156
 157 krb5_boolean KRB5_LIB_FUNCTION
 158 krb5_c_is_keyed_cksum(krb5_cksumtype ctype)
 159 {
 160     return krb5_checksum_is_keyed(NULL, ctype);
 161 }
 162
 163 krb5_error_code KRB5_LIB_FUNCTION
 164 krb5_copy_checksum (krb5_context context,
 165                     const krb5_checksum *old,
 166                     krb5_checksum **new)
 167 {
 168     *new = malloc(sizeof(**new));
 169     if (*new == NULL)
 170         return ENOMEM;
 171     return copy_Checksum(old, *new);
 172 }
 173
 174 krb5_error_code KRB5_LIB_FUNCTION
 175 krb5_c_checksum_length (krb5_context context, krb5_cksumtype cksumtype,
 176                         size_t *length)
 177 {
 178     return krb5_checksumsize(context, cksumtype, length);
 179 }
 180
 181 krb5_error_code KRB5_LIB_FUNCTION
 182 krb5_c_block_size(krb5_context context,
 183                   krb5_enctype enctype,
 184                   size_t *blocksize)
 185 {
 186     krb5_error_code ret;
 187     krb5_crypto crypto;
 188     krb5_keyblock key;
 189
 190     ret = krb5_generate_random_keyblock(context, enctype, &key);
 191     if (ret)
 192         return ret;
 193
 194     ret = krb5_crypto_init(context, &key, 0, &crypto);
 195     krb5_free_keyblock_contents(context, &key);
 196     if (ret)
 197         return ret;
 198     ret = krb5_crypto_getblocksize(context, crypto, blocksize);
 199     krb5_crypto_destroy(context, crypto);
 200
 201     return ret;
 202 }
 203
 204 krb5_error_code KRB5_LIB_FUNCTION
 205 krb5_c_decrypt(krb5_context context,
 206                const krb5_keyblock key,
 207                krb5_keyusage usage,
 208                const krb5_data *ivec,
 209                krb5_enc_data *input,
 210                krb5_data *output)
 211 {
 212     krb5_error_code ret;
 213     krb5_crypto crypto;
 214
 215     ret = krb5_crypto_init(context, &key, input->enctype, &crypto);
 216     if (ret)
 217         return ret;
 218
 219     if (ivec) {
 220         size_t blocksize;
 221
 222         ret = krb5_crypto_getblocksize(context, crypto, &blocksize);
 223         if (ret) {
 224         krb5_crypto_destroy(context, crypto);
 225         return ret;
 226         }
 227
 228         if (blocksize > ivec->length) {
 229             krb5_crypto_destroy(context, crypto);
 230             return KRB5_BAD_MSIZE;
 231         }
 232     }
 233
 234     ret = krb5_decrypt_ivec(context, crypto, usage,
 235                             input->ciphertext.data, input->ciphertext.length,
 236                             output,
 237                             ivec ? ivec->data : NULL);
 238
 239     krb5_crypto_destroy(context, crypto);
 240
 241     return ret ;
 242 }
 243
 244 krb5_error_code KRB5_LIB_FUNCTION
 245 krb5_c_encrypt(krb5_context context,
 246                const krb5_keyblock *key,
 247                krb5_keyusage usage,
 248                const krb5_data *ivec,
 249                const krb5_data *input,
 250                krb5_enc_data *output)
 251 {
 252     krb5_error_code ret;
 253     krb5_crypto crypto;
 254
 255     ret = krb5_crypto_init(context, key, 0, &crypto);
 256     if (ret)
 257         return ret;
 258
 259     if (ivec) {
 260         size_t blocksize;
 261
 262         ret = krb5_crypto_getblocksize(context, crypto, &blocksize);
 263         if (ret) {
 264             krb5_crypto_destroy(context, crypto);
 265             return ret;
 266         }
 267
 268         if (blocksize > ivec->length) {
 269             krb5_crypto_destroy(context, crypto);
 270             return KRB5_BAD_MSIZE;
 271         }
 272     }
 273
 274     ret = krb5_encrypt_ivec(context, crypto, usage,
 275                             input->data, input->length,
 276                             &output->ciphertext,
 277                             ivec ? ivec->data : NULL);
 278     output->kvno = 0;
 279     krb5_crypto_getenctype(context, crypto, &output->enctype);
 280
 281     krb5_crypto_destroy(context, crypto);
 282
 283     return ret ;
 284 }
 285
 286 krb5_error_code KRB5_LIB_FUNCTION
 287 krb5_c_encrypt_length(krb5_context context,
 288                       krb5_enctype enctype,
 289                       size_t inputlen,
 290                       size_t *length)
 291 {
 292     krb5_error_code ret;
 293     krb5_crypto crypto;
 294     krb5_keyblock key;
 295
 296     ret = krb5_generate_random_keyblock(context, enctype, &key);
 297     if (ret)
 298         return ret;
 299
 300     ret = krb5_crypto_init(context, &key, 0, &crypto);
 301     krb5_free_keyblock_contents(context, &key);
 302     if (ret)
 303         return ret;
 304
 305     *length = krb5_get_wrapped_length(context, crypto, inputlen);
 306     krb5_crypto_destroy(context, crypto);
 307
 308     return 0;
 309 }
 310
 311 krb5_error_code KRB5_LIB_FUNCTION
 312 krb5_c_enctype_compare(krb5_context context,
 313                        krb5_enctype e1,
 314                        krb5_enctype e2,
 315                        krb5_boolean *similar)
 316 {
 317     *similar = krb5_enctypes_compatible_keys(context, e1, e2);
 318     return 0;
 319 }
 320
 321 krb5_error_code KRB5_LIB_FUNCTION
 322 krb5_c_make_random_key(krb5_context context,
 323                        krb5_enctype enctype,
 324                        krb5_keyblock *random_key)
 325 {
 326     return krb5_generate_random_keyblock(context, enctype, random_key);
 327 }
 328
 329 krb5_error_code KRB5_LIB_FUNCTION
 330 krb5_c_keylengths(krb5_context context,
 331                   krb5_enctype enctype,
 332                   size_t *ilen,
 333                   size_t *keylen)
 334 {
 335     krb5_error_code ret;
 336
 337     ret = krb5_enctype_keybits(context, enctype, ilen);
 338     if (ret)
 339         return ret;
 340     *ilen = (*ilen + 7) / 8;
 341     return krb5_enctype_keysize(context, enctype, keylen);
 342 }
 343
 344 krb5_error_code KRB5_LIB_FUNCTION
 345 krb5_c_prf_length(krb5_context context,
 346                   krb5_enctype type,
 347                   size_t *length)
 348 {
 349     return krb5_crypto_prf_length(context, type, length);
 350 }
 351
 352 krb5_error_code KRB5_LIB_FUNCTION
 353 krb5_c_prf(krb5_context context,
 354            const krb5_keyblock *key,
 355            const krb5_data *input,
 356            krb5_data *output)
 357 {
 358     krb5_crypto crypto;
 359     krb5_error_code ret;
 360
 361     ret = krb5_crypto_init(context, key, 0, &crypto);
 362     if (ret)
 363         return ret;
 364
 365     ret = krb5_crypto_prf(context, crypto, input, output);
 366     krb5_crypto_destroy(context, crypto);
 367
 368     return ret;
 369 }