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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 /*
     30  *  glue routine gss_export_sec_context
     31  */
     32 
     33 #include <mechglueP.h>
     34 #include <stdio.h>
     35 #include <errno.h>
     36 #include <stdlib.h>
     37 #include <string.h>
     38 
     39 OM_uint32
     40 gss_import_sec_context(minor_status,
     41 			interprocess_token,
     42 			context_handle)
     43 
     44 OM_uint32 *		minor_status;
     45 const gss_buffer_t	interprocess_token;
     46 gss_ctx_id_t 		*context_handle;
     47 
     48 {
     49 	OM_uint32		length = 0;
     50 	OM_uint32		status;
     51 	char			*p;
     52 	gss_union_ctx_id_t	ctx;
     53 	gss_buffer_desc		token;
     54 	gss_mechanism		mech;
     55 
     56 	if (minor_status == NULL)
     57 		return (GSS_S_CALL_INACCESSIBLE_WRITE);
     58 	*minor_status = 0;
     59 
     60 	if (context_handle == NULL)
     61 		return (GSS_S_CALL_INACCESSIBLE_WRITE | GSS_S_NO_CONTEXT);
     62 	*context_handle = GSS_C_NO_CONTEXT;
     63 
     64 	if (GSS_EMPTY_BUFFER(interprocess_token))
     65 		return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_DEFECTIVE_TOKEN);
     66 
     67 	status = GSS_S_FAILURE;
     68 
     69 	ctx = (gss_union_ctx_id_t)malloc(sizeof (gss_union_ctx_id_desc));
     70 	if (!ctx)
     71 		return (GSS_S_FAILURE);
     72 
     73 	ctx->mech_type = (gss_OID) malloc(sizeof (gss_OID_desc));
     74 	if (!ctx->mech_type) {
     75 		free(ctx);
     76 		return (GSS_S_FAILURE);
     77 	}
     78 
     79 	if (interprocess_token->length >= sizeof (OM_uint32)) {
     80 		p = interprocess_token->value;
     81 		length = (OM_uint32)*p++;
     82 		length = (OM_uint32)(length << 8) + *p++;
     83 		length = (OM_uint32)(length << 8) + *p++;
     84 		length = (OM_uint32)(length << 8) + *p++;
     85 	}
     86 
     87 	if (length == 0 ||
     88 	    length > (interprocess_token->length - sizeof (OM_uint32))) {
     89 		free(ctx);
     90 		return (GSS_S_CALL_BAD_STRUCTURE | GSS_S_DEFECTIVE_TOKEN);
     91 	}
     92 
     93 	ctx->mech_type->length = length;
     94 	ctx->mech_type->elements = malloc(length);
     95 	if (!ctx->mech_type->elements) {
     96 		goto error_out;
     97 	}
     98 	(void) memcpy(ctx->mech_type->elements, p, length);
     99 	p += length;
    100 
    101 	token.length = interprocess_token->length - sizeof (OM_uint32) - length;
    102 	token.value = p;
    103 
    104 	/*
    105 	 * select the approprate underlying mechanism routine and
    106 	 * call it.
    107 	 */
    108 
    109 	mech = __gss_get_mechanism(ctx->mech_type);
    110 	if (!mech) {
    111 		status = GSS_S_BAD_MECH;
    112 		goto error_out;
    113 	}
    114 	if (!mech->gss_import_sec_context) {
    115 		status = GSS_S_UNAVAILABLE;
    116 		goto error_out;
    117 	}
    118 
    119 	status = mech->gss_import_sec_context(mech->context, minor_status,
    120 					&token, &ctx->internal_ctx_id);
    121 
    122 	if (status == GSS_S_COMPLETE) {
    123 		*context_handle = (gss_ctx_id_t)ctx;
    124 		return (GSS_S_COMPLETE);
    125 	}
    126 
    127 error_out:
    128 	if (ctx) {
    129 		if (ctx->mech_type) {
    130 			if (ctx->mech_type->elements)
    131 				free(ctx->mech_type->elements);
    132 			free(ctx->mech_type);
    133 		}
    134 		free(ctx);
    135 	}
    136 	return (status);
    137 }
    138