diff options
Diffstat (limited to 'crypto/heimdal/lib/gssapi/krb5/encapsulate.c')
| -rw-r--r-- | crypto/heimdal/lib/gssapi/krb5/encapsulate.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/gssapi/krb5/encapsulate.c b/crypto/heimdal/lib/gssapi/krb5/encapsulate.c new file mode 100644 index 0000000..58dcb5c --- /dev/null +++ b/crypto/heimdal/lib/gssapi/krb5/encapsulate.c @@ -0,0 +1,155 @@ +/* + * 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 "krb5/gsskrb5_locl.h" + +RCSID("$Id: encapsulate.c 18459 2006-10-14 10:12:16Z lha $"); + +void +_gssapi_encap_length (size_t data_len, + size_t *len, + size_t *total_len, + const gss_OID mech) +{ + size_t len_len; + + *len = 1 + 1 + mech->length + data_len; + + len_len = der_length_len(*len); + + *total_len = 1 + len_len + *len; +} + +void +_gsskrb5_encap_length (size_t data_len, + size_t *len, + size_t *total_len, + const gss_OID mech) +{ + _gssapi_encap_length(data_len + 2, len, total_len, mech); +} + +void * +_gsskrb5_make_header (void *ptr, + size_t len, + const void *type, + const gss_OID mech) +{ + u_char *p = ptr; + p = _gssapi_make_mech_header(p, len, mech); + memcpy (p, type, 2); + p += 2; + return p; +} + +void * +_gssapi_make_mech_header(void *ptr, + size_t len, + const gss_OID mech) +{ + u_char *p = ptr; + int e; + size_t len_len, foo; + + *p++ = 0x60; + len_len = der_length_len(len); + e = der_put_length (p + len_len - 1, len_len, len, &foo); + if(e || foo != len_len) + abort (); + p += len_len; + *p++ = 0x06; + *p++ = mech->length; + memcpy (p, mech->elements, mech->length); + p += mech->length; + return p; +} + +/* + * Give it a krb5_data and it will encapsulate with extra GSS-API wrappings. + */ + +OM_uint32 +_gssapi_encapsulate( + OM_uint32 *minor_status, + const krb5_data *in_data, + gss_buffer_t output_token, + const gss_OID mech +) +{ + size_t len, outer_len; + void *p; + + _gssapi_encap_length (in_data->length, &len, &outer_len, mech); + + output_token->length = outer_len; + output_token->value = malloc (outer_len); + if (output_token->value == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + + p = _gssapi_make_mech_header (output_token->value, len, mech); + memcpy (p, in_data->data, in_data->length); + return GSS_S_COMPLETE; +} + +/* + * Give it a krb5_data and it will encapsulate with extra GSS-API krb5 + * wrappings. + */ + +OM_uint32 +_gsskrb5_encapsulate( + OM_uint32 *minor_status, + const krb5_data *in_data, + gss_buffer_t output_token, + const void *type, + const gss_OID mech +) +{ + size_t len, outer_len; + u_char *p; + + _gsskrb5_encap_length (in_data->length, &len, &outer_len, mech); + + output_token->length = outer_len; + output_token->value = malloc (outer_len); + if (output_token->value == NULL) { + *minor_status = ENOMEM; + return GSS_S_FAILURE; + } + + p = _gsskrb5_make_header (output_token->value, len, type, mech); + memcpy (p, in_data->data, in_data->length); + return GSS_S_COMPLETE; +} |
