crypto/external/bsd/heimdal/dist/lib/gssapi/krb5/import_name.c

   1 /*      $NetBSD: import_name.c,v 1.1.1.2 2014/04/24 12:45:29 pettai Exp $       */
   2
   3 /*
   4  * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "gsskrb5_locl.h"
  37
  38 static OM_uint32
  39 parse_krb5_name (OM_uint32 *minor_status,
  40                  krb5_context context,
  41                  const char *name,
  42                  gss_name_t *output_name)
  43 {
  44     krb5_principal princ;
  45     krb5_error_code kerr;
  46
  47     kerr = krb5_parse_name (context, name, &princ);
  48
  49     if (kerr == 0) {
  50         *output_name = (gss_name_t)princ;
  51         return GSS_S_COMPLETE;
  52     }
  53     *minor_status = kerr;
  54
  55     if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
  56         return GSS_S_BAD_NAME;
  57
  58     return GSS_S_FAILURE;
  59 }
  60
  61 static OM_uint32
  62 import_krb5_name (OM_uint32 *minor_status,
  63                   krb5_context context,
  64                   const gss_buffer_t input_name_buffer,
  65                   gss_name_t *output_name)
  66 {
  67     OM_uint32 ret;
  68     char *tmp;
  69
  70     tmp = malloc (input_name_buffer->length + 1);
  71     if (tmp == NULL) {
  72         *minor_status = ENOMEM;
  73         return GSS_S_FAILURE;
  74     }
  75     memcpy (tmp,
  76             input_name_buffer->value,
  77             input_name_buffer->length);
  78     tmp[input_name_buffer->length] = '\0';
  79
  80     ret = parse_krb5_name(minor_status, context, tmp, output_name);
  81     free(tmp);
  82
  83     return ret;
  84 }
  85
  86 OM_uint32
  87 _gsskrb5_canon_name(OM_uint32 *minor_status, krb5_context context,
  88                     int use_dns, krb5_const_principal sourcename, gss_name_t targetname,
  89                     krb5_principal *out)
  90 {
  91     krb5_principal p = (krb5_principal)targetname;
  92     krb5_error_code ret;
  93     char *hostname = NULL, *service;
  94
  95     *minor_status = 0;
  96
  97     /* If its not a hostname */
  98     if (krb5_principal_get_type(context, p) != MAGIC_HOSTBASED_NAME_TYPE) {
  99         ret = krb5_copy_principal(context, p, out);
 100     } else if (!use_dns) {
 101         ret = krb5_copy_principal(context, p, out);
 102         if (ret)
 103             goto out;
 104         krb5_principal_set_type(context, *out, KRB5_NT_SRV_HST);
 105         if (sourcename)
 106             ret = krb5_principal_set_realm(context, *out, sourcename->realm);
 107     } else {
 108         if (p->name.name_string.len == 0)
 109             return GSS_S_BAD_NAME;
 110         else if (p->name.name_string.len > 1)
 111             hostname = p->name.name_string.val[1];
 112
 113         service = p->name.name_string.val[0];
 114
 115         ret = krb5_sname_to_principal(context,
 116                                       hostname,
 117                                       service,
 118                                       KRB5_NT_SRV_HST,
 119                                       out);
 120     }
 121
 122  out:
 123     if (ret) {
 124         *minor_status = ret;
 125         return GSS_S_FAILURE;
 126     }
 127
 128     return 0;
 129 }
 130
 131
 132 static OM_uint32
 133 import_hostbased_name (OM_uint32 *minor_status,
 134                        krb5_context context,
 135                        const gss_buffer_t input_name_buffer,
 136                        gss_name_t *output_name)
 137 {
 138     krb5_principal princ = NULL;
 139     krb5_error_code kerr;
 140     char *tmp, *p, *host = NULL;
 141
 142     tmp = malloc (input_name_buffer->length + 1);
 143     if (tmp == NULL) {
 144         *minor_status = ENOMEM;
 145         return GSS_S_FAILURE;
 146     }
 147     memcpy (tmp,
 148             input_name_buffer->value,
 149             input_name_buffer->length);
 150     tmp[input_name_buffer->length] = '\0';
 151
 152     p = strchr (tmp, '@');
 153     if (p != NULL) {
 154         *p = '\0';
 155         host = p + 1;
 156     }
 157
 158     kerr = krb5_make_principal(context, &princ, NULL, tmp, host, NULL);
 159     free (tmp);
 160     *minor_status = kerr;
 161     if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
 162         return GSS_S_BAD_NAME;
 163     else if (kerr)
 164         return GSS_S_FAILURE;
 165
 166     krb5_principal_set_type(context, princ, MAGIC_HOSTBASED_NAME_TYPE);
 167     *output_name = (gss_name_t)princ;
 168
 169     return 0;
 170 }
 171
 172 static OM_uint32
 173 import_export_name (OM_uint32 *minor_status,
 174                     krb5_context context,
 175                     const gss_buffer_t input_name_buffer,
 176                     gss_name_t *output_name)
 177 {
 178     unsigned char *p;
 179     uint32_t length;
 180     OM_uint32 ret;
 181     char *name;
 182
 183     if (input_name_buffer->length < 10 + GSS_KRB5_MECHANISM->length)
 184         return GSS_S_BAD_NAME;
 185
 186     /* TOK, MECH_OID_LEN, DER(MECH_OID), NAME_LEN, NAME */
 187
 188     p = input_name_buffer->value;
 189
 190     if (memcmp(&p[0], "\x04\x01\x00", 3) != 0 ||
 191         p[3] != GSS_KRB5_MECHANISM->length + 2 ||
 192         p[4] != 0x06 ||
 193         p[5] != GSS_KRB5_MECHANISM->length ||
 194         memcmp(&p[6], GSS_KRB5_MECHANISM->elements,
 195                GSS_KRB5_MECHANISM->length) != 0)
 196         return GSS_S_BAD_NAME;
 197
 198     p += 6 + GSS_KRB5_MECHANISM->length;
 199
 200     length = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
 201     p += 4;
 202
 203     if (length > input_name_buffer->length - 10 - GSS_KRB5_MECHANISM->length)
 204         return GSS_S_BAD_NAME;
 205
 206     name = malloc(length + 1);
 207     if (name == NULL) {
 208         *minor_status = ENOMEM;
 209         return GSS_S_FAILURE;
 210     }
 211     memcpy(name, p, length);
 212     name[length] = '\0';
 213
 214     ret = parse_krb5_name(minor_status, context, name, output_name);
 215     free(name);
 216
 217     return ret;
 218 }
 219
 220 OM_uint32 GSSAPI_CALLCONV _gsskrb5_import_name
 221            (OM_uint32 * minor_status,
 222             const gss_buffer_t input_name_buffer,
 223             const gss_OID input_name_type,
 224             gss_name_t * output_name
 225            )
 226 {
 227     krb5_context context;
 228
 229     *minor_status = 0;
 230     *output_name = GSS_C_NO_NAME;
 231
 232     GSSAPI_KRB5_INIT (&context);
 233
 234     if (gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE) ||
 235         gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE_X))
 236         return import_hostbased_name (minor_status,
 237                                       context,
 238                                       input_name_buffer,
 239                                       output_name);
 240     else if (input_name_type == GSS_C_NO_OID
 241              || gss_oid_equal(input_name_type, GSS_C_NT_USER_NAME)
 242              || gss_oid_equal(input_name_type, GSS_KRB5_NT_PRINCIPAL_NAME))
 243         /* default printable syntax */
 244         return import_krb5_name (minor_status,
 245                                  context,
 246                                  input_name_buffer,
 247                                  output_name);
 248     else if (gss_oid_equal(input_name_type, GSS_C_NT_EXPORT_NAME)) {
 249         return import_export_name(minor_status,
 250                                   context,
 251                                   input_name_buffer,
 252                                   output_name);
 253     } else {
 254         *minor_status = 0;
 255         return GSS_S_BAD_NAMETYPE;
 256     }
 257 }