diff options
Diffstat (limited to 'source4/heimdal/lib/gssapi/import_name.c')
| -rw-r--r-- | source4/heimdal/lib/gssapi/import_name.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/source4/heimdal/lib/gssapi/import_name.c b/source4/heimdal/lib/gssapi/import_name.c new file mode 100644 index 0000000000..423e757146 --- /dev/null +++ b/source4/heimdal/lib/gssapi/import_name.c @@ -0,0 +1,229 @@ +/* + * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "gssapi_locl.h" + +RCSID("$Id: import_name.c,v 1.13 2003/03/16 17:33:31 lha Exp $"); + +static OM_uint32 +parse_krb5_name (OM_uint32 *minor_status, + const char *name, + gss_name_t *output_name) +{ + krb5_error_code kerr; + + kerr = krb5_parse_name (gssapi_krb5_context, name, output_name); + + if (kerr == 0) + return GSS_S_COMPLETE; + else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED) { + gssapi_krb5_set_error_string (); + *minor_status = kerr; + return GSS_S_BAD_NAME; + } else { + gssapi_krb5_set_error_string (); + *minor_status = kerr; + return GSS_S_FAILURE; + } +} + +static OM_uint32 +import_krb5_name (OM_uint32 *minor_status, + const gss_buffer_t input_name_buffer, + gss_name_t *output_name) +{ + OM_uint32 ret; + char *tmp; + + tmp = malloc (input_name_buffer->length + 1); + if (tmp == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + memcpy (tmp, + input_name_buffer->value, + input_name_buffer->length); + tmp[input_name_buffer->length] = '\0'; + + ret = parse_krb5_name(minor_status, tmp, output_name); + free(tmp); + + return ret; +} + +static OM_uint32 +import_hostbased_name (OM_uint32 *minor_status, + const gss_buffer_t input_name_buffer, + gss_name_t *output_name) +{ + krb5_error_code kerr; + char *tmp; + char *p; + char *host; + char local_hostname[MAXHOSTNAMELEN]; + + *output_name = NULL; + + tmp = malloc (input_name_buffer->length + 1); + if (tmp == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + memcpy (tmp, + input_name_buffer->value, + input_name_buffer->length); + tmp[input_name_buffer->length] = '\0'; + + p = strchr (tmp, '@'); + if (p != NULL) { + *p = '\0'; + host = p + 1; + } else { + if (gethostname(local_hostname, sizeof(local_hostname)) < 0) { + *minor_status = errno; + free (tmp); + return GSS_S_FAILURE; + } + host = local_hostname; + } + + kerr = krb5_sname_to_principal (gssapi_krb5_context, + host, + tmp, + KRB5_NT_SRV_HST, + output_name); + free (tmp); + *minor_status = kerr; + if (kerr == 0) + return GSS_S_COMPLETE; + else if (kerr == KRB5_PARSE_ILLCHAR || kerr == KRB5_PARSE_MALFORMED) { + gssapi_krb5_set_error_string (); + *minor_status = kerr; + return GSS_S_BAD_NAME; + } else { + gssapi_krb5_set_error_string (); + *minor_status = kerr; + return GSS_S_FAILURE; + } +} + +static OM_uint32 +import_export_name (OM_uint32 *minor_status, + const gss_buffer_t input_name_buffer, + gss_name_t *output_name) +{ + unsigned char *p; + uint32_t length; + OM_uint32 ret; + char *name; + + if (input_name_buffer->length < 10 + GSS_KRB5_MECHANISM->length) + return GSS_S_BAD_NAME; + + /* TOK, MECH_OID_LEN, DER(MECH_OID), NAME_LEN, NAME */ + + p = input_name_buffer->value; + + if (memcmp(&p[0], "\x04\x01\x00", 3) != 0 || + p[3] != GSS_KRB5_MECHANISM->length + 2 || + p[4] != 0x06 || + p[5] != GSS_KRB5_MECHANISM->length || + memcmp(&p[6], GSS_KRB5_MECHANISM->elements, + GSS_KRB5_MECHANISM->length) != 0) + return GSS_S_BAD_NAME; + + p += 6 + GSS_KRB5_MECHANISM->length; + + length = p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]; + p += 4; + + if (length > input_name_buffer->length - 10 - GSS_KRB5_MECHANISM->length) + return GSS_S_BAD_NAME; + + name = malloc(length + 1); + if (name == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + memcpy(name, p, length); + name[length] = '\0'; + + ret = parse_krb5_name(minor_status, name, output_name); + free(name); + + return ret; +} + +int +gss_oid_equal(const gss_OID a, const gss_OID b) +{ + if (a == b) + return 1; + else if (a == GSS_C_NO_OID || b == GSS_C_NO_OID || a->length != b->length) + return 0; + else + return memcmp(a->elements, b->elements, a->length) == 0; +} + +OM_uint32 gss_import_name + (OM_uint32 * minor_status, + const gss_buffer_t input_name_buffer, + const gss_OID input_name_type, + gss_name_t * output_name + ) +{ + GSSAPI_KRB5_INIT (); + + *minor_status = 0; + *output_name = GSS_C_NO_NAME; + + if (gss_oid_equal(input_name_type, GSS_C_NT_HOSTBASED_SERVICE)) + return import_hostbased_name (minor_status, + input_name_buffer, + output_name); + else if (gss_oid_equal(input_name_type, GSS_C_NO_OID) + || gss_oid_equal(input_name_type, GSS_C_NT_USER_NAME) + || gss_oid_equal(input_name_type, GSS_KRB5_NT_PRINCIPAL_NAME)) + /* default printable syntax */ + return import_krb5_name (minor_status, + input_name_buffer, + output_name); + else if (gss_oid_equal(input_name_type, GSS_C_NT_EXPORT_NAME)) { + return import_export_name(minor_status, + input_name_buffer, + output_name); + } else { + *minor_status = 0; + return GSS_S_BAD_NAMETYPE; + } +} |