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/*-
* Copyright (c) 2005 Doug Rabson
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD: src/lib/libgssapi/gss_import_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
*/
#include "mech_locl.h"
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_import_sec_context(OM_uint32 *minor_status,
const gss_buffer_t interprocess_token,
gss_ctx_id_t *context_handle)
{
OM_uint32 ret = GSS_S_FAILURE, tmp_minor;
krb5_storage *sp;
gssapi_mech_interface m;
struct _gss_context *ctx = NULL;
gss_buffer_desc buf = GSS_C_EMPTY_BUFFER;
unsigned char verflags;
_gss_mg_log(10, "gss-isc called");
if (!minor_status || !context_handle) {
*minor_status = EFAULT;
return GSS_S_FAILURE;
}
*minor_status = 0;
*context_handle = GSS_C_NO_CONTEXT;
sp = krb5_storage_from_mem(interprocess_token->value,
interprocess_token->length);
if (!sp) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_PACKED);
ctx = calloc(1, sizeof(struct _gss_context));
if (!ctx) {
*minor_status = ENOMEM;
goto failure;
}
if (krb5_ret_uint8(sp, &verflags))
goto failure;
if ((verflags & EXPORT_CONTEXT_VERSION_MASK) != 0) {
_gss_mg_log(10, "gss-isc failed, token version %d not recognised",
(int)(verflags & EXPORT_CONTEXT_VERSION_MASK));
/* We don't recognise the version */
goto failure;
}
if (verflags & EXPORT_CONTEXT_FLAG_ACCUMULATING) {
uint32_t target_len;
if (krb5_ret_uint8(sp, &ctx->gc_initial))
goto failure;
if (krb5_ret_uint32(sp, &target_len))
goto failure;
ret = _gss_mg_ret_buffer(minor_status, sp, &buf);
if (ret != GSS_S_COMPLETE)
goto failure;
ctx->gc_input.value = calloc(target_len, 1);
if (ctx->gc_input.value == NULL)
goto failure;
ctx->gc_target_len = target_len;
ctx->gc_input.length = buf.length;
if (buf.value)
memcpy(ctx->gc_input.value, buf.value, buf.length);
gss_release_buffer(&tmp_minor, &buf);
}
if (verflags & EXPORT_CONTEXT_FLAG_MECH_CTX) {
gss_OID mech_oid;
ret = _gss_mg_ret_oid(minor_status, sp, &mech_oid);
if (ret != GSS_S_COMPLETE)
goto failure;
if (mech_oid == GSS_C_NO_OID) {
ret = GSS_S_BAD_MECH;
goto failure;
}
m = __gss_get_mechanism(mech_oid);
if (m == NULL) {
ret = GSS_S_DEFECTIVE_TOKEN;
goto failure;
}
ctx->gc_mech = m;
ret = _gss_mg_ret_buffer(minor_status, sp, &buf);
if (ret != GSS_S_COMPLETE)
goto failure;
if (buf.value == NULL) {
ret = GSS_S_DEFECTIVE_TOKEN;
goto failure;
}
ret = m->gm_import_sec_context(minor_status, &buf, &ctx->gc_ctx);
if (ret != GSS_S_COMPLETE) {
_gss_mg_error(m, *minor_status);
goto failure;
}
}
*context_handle = (gss_ctx_id_t) ctx;
ctx = NULL;
ret = GSS_S_COMPLETE;
failure:
free(ctx);
krb5_storage_free(sp);
_gss_secure_release_buffer(&tmp_minor, &buf);
return ret;
}
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