lib/gssapi/krb5/import_name.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 "gsskrb5_locl.h"
  35
  36 static OM_uint32
  37 parse_krb5_name (OM_uint32 *minor_status,
  38                  krb5_context context,
  39                  const char *name,
  40                  gss_name_t *output_name)
  41 {
  42     krb5_principal princ;
  43     krb5_error_code kerr;
  44
  45     kerr = krb5_parse_name (context, name, &princ);
  46
  47     if (kerr == 0) {
  48         *output_name = (gss_name_t)princ;
  49         return GSS_S_COMPLETE;
  50     }
  51     *minor_status = kerr;
  52
  53     if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
  54         return GSS_S_BAD_NAME;
  55
  56     return GSS_S_FAILURE;
  57 }
  58
  59 static OM_uint32
  60 import_krb5_name (OM_uint32 *minor_status,
  61                   krb5_context context,
  62                   const gss_buffer_t input_name_buffer,
  63                   gss_name_t *output_name)
  64 {
  65     OM_uint32 ret;
  66     char *tmp;
  67
  68     tmp = malloc (input_name_buffer->length + 1);
  69     if (tmp == NULL) {
  70         *minor_status = ENOMEM;
  71         return GSS_S_FAILURE;
  72     }
  73     memcpy (tmp,
  74             input_name_buffer->value,
  75             input_name_buffer->length);
  76     tmp[input_name_buffer->length] = '\0';
  77
  78     ret = parse_krb5_name(minor_status, context, tmp, output_name);
  79     free(tmp);
  80
  81     return ret;
  82 }
  83
  84 OM_uint32
  85 _gsskrb5_canon_name(OM_uint32 *minor_status, krb5_context context,
  86                     int use_dns, gss_name_t name, krb5_principal *out)
  87 {
  88     krb5_principal p = (krb5_principal)name;
  89     krb5_error_code ret;
  90     char *hostname = NULL, *service;
  91
  92     *minor_status = 0;
  93
  94     /* If its not a hostname */
  95     if (krb5_principal_get_type(context, p) != MAGIC_HOSTBASED_NAME_TYPE) {
  96         ret = krb5_copy_principal(context, p, out);
  97     } else if (!use_dns) {
  98         ret = krb5_copy_principal(context, p, out);
  99         if (ret == 0)
 100             krb5_principal_set_type(context, *out, KRB5_NT_SRV_HST);
 101     } else {
 102         if (p->name.name_string.len == 0)
 103             return GSS_S_BAD_NAME;
 104         else if (p->name.name_string.len > 1)
 105             hostname = p->name.name_string.val[1];
 106
 107         service = p->name.name_string.val[0];
 108
 109         ret = krb5_sname_to_principal(context,
 110                                       hostname,
 111                                       service,
 112                                       KRB5_NT_SRV_HST,
 113                                       out);
 114     }
 115
 116     if (ret) {
 117         *minor_status = ret;
 118         return GSS_S_FAILURE;
 119     }
 120
 121     return 0;
 122 }
 123
 124
 125 static OM_uint32
 126 import_hostbased_name (OM_uint32 *minor_status,
 127                        krb5_context context,
 128                        const gss_buffer_t input_name_buffer,
 129                        gss_name_t *output_name)
 130 {
 131     krb5_principal princ = NULL;
 132     krb5_error_code kerr;
 133     char *tmp, *p, *host = NULL;
 134
 135     tmp = malloc (input_name_buffer->length + 1);
 136     if (tmp == NULL) {
 137         *minor_status = ENOMEM;
 138         return GSS_S_FAILURE;
 139     }
 140     memcpy (tmp,
 141             input_name_buffer->value,
 142             input_name_buffer->length);
 143     tmp[input_name_buffer->length] = '\0';
 144
 145     p = strchr (tmp, '@');
 146     if (p != NULL) {
 147         *p = '\0';
 148         host = p + 1;
 149     }
 150
 151     kerr = krb5_make_principal(context, &princ, NULL, tmp, host, NULL);
 152     free (tmp);
 153     *minor_status = kerr;
 154     if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED)
 155         return GSS_S_BAD_NAME;
 156     else if (kerr)
 157         return GSS_S_FAILURE;
 158
 159     krb5_principal_set_type(context, princ, MAGIC_HOSTBASED_NAME_TYPE);
 160     *output_name = (gss_name_t)princ;
 161
 162     return 0;
 163 }
 164
 165 static OM_uint32
 166 import_export_name (OM_uint32 *minor_status,
 167                     krb5_context context,
 168                     const gss_buffer_t input_name_buffer,
 169                     gss_name_t *output_name)
 170 {
 171     unsigned char *p;
 172     uint32_t length;
 173     OM_uint32 ret;
 174     char *name;
 175
 176     if (input_name_buffer->length < 10 + GSS_KRB5_MECHANISM->length)
 177         return GSS_S_BAD_NAME;
 178
 179     /* TOK, MECH_OID_LEN, DER(MECH_OID), NAME_LEN, NAME */
 180
 181     p = input_name_buffer->value;
 182
 183     if (memcmp(&p[0], "\x04\x01\x00", 3) != 0 ||
 184         p[3] != GSS_KRB5_MECHANISM->length + 2 ||
 185         p[4] != 0x06 ||
 186         p[5] != GSS_KRB5_MECHANISM->length ||
 187         memcmp(&p[6], GSS_KRB5_MECHANISM->elements,
 188                GSS_KRB5_MECHANISM->length) != 0)
 189         return GSS_S_BAD_NAME;
 190
 191     p += 6 + GSS_KRB5_MECHANISM->length;
 192
 193     length = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3];
 194     p += 4;
 195
 196     if (length > input_name_buffer->length - 10 - GSS_KRB5_MECHANISM->length)
 197         return GSS_S_BAD_NAME;
 198
 199     name = malloc(length + 1);
 200     if (name == NULL) {
 201         *minor_status = ENOMEM;
 202         return GSS_S_FAILURE;
 203     }
 204     memcpy(name, p, length);
 205     name[length] = '\0';
 206
 207     ret = parse_krb5_name(minor_status, context, name, output_name);
 208     free(name);
 209
 210     return ret;
 211 }
 212
 213 OM_uint32 _gsskrb5_import_name
 214            (OM_uint32 * minor_status,
 215             const gss_buffer_t input_name_buffer,
 216             const gss_OID input_name_type,
 217             gss_name_t * output_name
 218            )
 219 {
 220     krb5_context context;
 221
 222     *minor_status = 0;
 223     *output_name = GSS_C_NO_NAME;
 224
 225     GSSAPI_KRB5_INIT (&context);
 226
 227     if (gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE) ||
 228         gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE_X))
 229         return import_hostbased_name (minor_status,
 230                                       context,
 231                                       input_name_buffer,
 232                                       output_name);
 233     else if (gss_oid_equal(input_name_type, GSS_C_NO_OID)
 234              || gss_oid_equal(input_name_type, GSS_C_NT_USER_NAME)
 235              || gss_oid_equal(input_name_type, GSS_KRB5_NT_PRINCIPAL_NAME))
 236         /* default printable syntax */
 237         return import_krb5_name (minor_status,
 238                                  context,
 239                                  input_name_buffer,
 240                                  output_name);
 241     else if (gss_oid_equal(input_name_type, GSS_C_NT_EXPORT_NAME)) {
 242         return import_export_name(minor_status,
 243                                   context,
 244                                   input_name_buffer,
 245                                   output_name);
 246     } else {
 247         *minor_status = 0;
 248         return GSS_S_BAD_NAMETYPE;
 249     }
 250 }