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/* #pragma ident "@(#)g_init_sec_context.c 1.20 03/10/24 SMI" */
/*
* Copyright 1996 by Sun Microsystems, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appears in all copies and
* that both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of Sun Microsystems not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. Sun Microsystems makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* glue routine for gss_init_sec_context
*/
#include "mglueP.h"
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <string.h>
static OM_uint32
val_init_sec_ctx_args(
OM_uint32 *minor_status,
gss_cred_id_t claimant_cred_handle,
gss_ctx_id_t *context_handle,
gss_name_t target_name,
gss_OID req_mech_type,
OM_uint32 req_flags,
OM_uint32 time_req,
gss_channel_bindings_t input_chan_bindings,
gss_buffer_t input_token,
gss_OID *actual_mech_type,
gss_buffer_t output_token,
OM_uint32 *ret_flags,
OM_uint32 *time_rec)
{
/* Initialize outputs. */
if (minor_status != NULL)
*minor_status = 0;
if (actual_mech_type != NULL)
*actual_mech_type = GSS_C_NO_OID;
if (output_token != GSS_C_NO_BUFFER) {
output_token->length = 0;
output_token->value = NULL;
}
/* Validate arguments. */
if (minor_status == NULL)
return (GSS_S_CALL_INACCESSIBLE_WRITE);
if (context_handle == NULL)
return (GSS_S_CALL_INACCESSIBLE_WRITE | GSS_S_NO_CONTEXT);
if (target_name == NULL)
return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_BAD_NAME);
if (output_token == NULL)
return (GSS_S_CALL_INACCESSIBLE_WRITE);
return (GSS_S_COMPLETE);
}
OM_uint32 KRB5_CALLCONV
gss_init_sec_context (minor_status,
claimant_cred_handle,
context_handle,
target_name,
req_mech_type,
req_flags,
time_req,
input_chan_bindings,
input_token,
actual_mech_type,
output_token,
ret_flags,
time_rec)
OM_uint32 * minor_status;
gss_cred_id_t claimant_cred_handle;
gss_ctx_id_t * context_handle;
gss_name_t target_name;
gss_OID req_mech_type;
OM_uint32 req_flags;
OM_uint32 time_req;
gss_channel_bindings_t input_chan_bindings;
gss_buffer_t input_token;
gss_OID * actual_mech_type;
gss_buffer_t output_token;
OM_uint32 * ret_flags;
OM_uint32 * time_rec;
{
OM_uint32 status, temp_minor_status;
gss_union_name_t union_name;
gss_union_cred_t union_cred;
gss_name_t internal_name;
gss_union_ctx_id_t union_ctx_id;
gss_OID mech_type = (gss_OID) req_mech_type;
gss_mechanism mech;
gss_cred_id_t input_cred_handle;
status = val_init_sec_ctx_args(minor_status,
claimant_cred_handle,
context_handle,
target_name,
req_mech_type,
req_flags,
time_req,
input_chan_bindings,
input_token,
actual_mech_type,
output_token,
ret_flags,
time_rec);
if (status != GSS_S_COMPLETE)
return (status);
if (req_mech_type)
mech_type = (gss_OID)req_mech_type;
union_name = (gss_union_name_t)target_name;
/*
* obtain the gss mechanism information for the requested
* mechanism. If mech_type is NULL, set it to the resultant
* mechanism
*/
mech = gssint_get_mechanism (mech_type);
if (mech == NULL)
return (GSS_S_BAD_MECH);
if (mech->gss_init_sec_context == NULL)
return (GSS_S_UNAVAILABLE);
if (mech_type == GSS_C_NULL_OID)
mech_type = &mech->mech_type;
/*
* If target_name is mechanism_specific, then it must match the
* mech_type that we're about to use. Otherwise, do an import on
* the external_name form of the target name.
*/
if (union_name->mech_type &&
g_OID_equal(union_name->mech_type, mech_type)) {
internal_name = union_name->mech_name;
} else {
if ((status = gssint_import_internal_name(minor_status, mech_type,
union_name,
&internal_name)) != GSS_S_COMPLETE)
return (status);
}
/*
* if context_handle is GSS_C_NO_CONTEXT, allocate a union context
* descriptor to hold the mech type information as well as the
* underlying mechanism context handle. Otherwise, cast the
* value of *context_handle to the union context variable.
*/
if(*context_handle == GSS_C_NO_CONTEXT) {
status = GSS_S_FAILURE;
union_ctx_id = (gss_union_ctx_id_t)
malloc(sizeof(gss_union_ctx_id_desc));
if (union_ctx_id == NULL)
goto end;
if (generic_gss_copy_oid(&temp_minor_status, mech_type,
&union_ctx_id->mech_type) != GSS_S_COMPLETE) {
free(union_ctx_id);
goto end;
}
/* copy the supplied context handle */
union_ctx_id->internal_ctx_id = GSS_C_NO_CONTEXT;
} else
union_ctx_id = *context_handle;
/*
* get the appropriate cred handle from the union cred struct.
* defaults to GSS_C_NO_CREDENTIAL if there is no cred, which will
* use the default credential.
*/
union_cred = (gss_union_cred_t) claimant_cred_handle;
input_cred_handle = gssint_get_mechanism_cred(union_cred, mech_type);
/*
* now call the approprate underlying mechanism routine
*/
status = mech->gss_init_sec_context(
minor_status,
input_cred_handle,
&union_ctx_id->internal_ctx_id,
internal_name,
mech_type,
req_flags,
time_req,
input_chan_bindings,
input_token,
actual_mech_type,
output_token,
ret_flags,
time_rec);
if (status != GSS_S_COMPLETE && status != GSS_S_CONTINUE_NEEDED) {
/*
* the spec says (the preferred) method is to delete all
* context info on the first call to init, and on all
* subsequent calls make the caller responsible for
* calling gss_delete_sec_context
*/
map_error(minor_status, mech);
if (*context_handle == GSS_C_NO_CONTEXT) {
free(union_ctx_id->mech_type->elements);
free(union_ctx_id->mech_type);
free(union_ctx_id);
}
} else if (*context_handle == GSS_C_NO_CONTEXT) {
union_ctx_id->loopback = union_ctx_id;
*context_handle = (gss_ctx_id_t)union_ctx_id;
}
end:
if (union_name->mech_name == NULL ||
union_name->mech_name != internal_name) {
(void) gssint_release_internal_name(&temp_minor_status,
mech_type, &internal_name);
}
return(status);
}
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