95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/*
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* Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "gsskrb5_locl.h"
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OM_uint32 GSSAPI_CALLCONV _gsskrb5_unwrap
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(OM_uint32 * minor_status,
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gss_const_ctx_id_t context_handle,
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const gss_buffer_t input_message_buffer,
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gss_buffer_t output_message_buffer,
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int * conf_state,
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gss_qop_t * qop_state
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)
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{
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krb5_keyblock *key;
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krb5_context context;
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OM_uint32 ret;
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gsskrb5_ctx ctx = rk_UNCONST(context_handle);
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output_message_buffer->value = NULL;
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output_message_buffer->length = 0;
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if (qop_state != NULL)
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*qop_state = GSS_C_QOP_DEFAULT;
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GSSAPI_KRB5_INIT (&context);
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if (ctx->more_flags & IS_CFX)
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return _gssapi_unwrap_cfx (minor_status, ctx, context,
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input_message_buffer, output_message_buffer,
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conf_state, qop_state);
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HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
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ret = _gsskrb5i_get_token_key(ctx, context, &key);
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HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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*minor_status = 0;
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switch (key->keytype) {
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case KRB5_ENCTYPE_DES_CBC_CRC :
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case KRB5_ENCTYPE_DES_CBC_MD4 :
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case KRB5_ENCTYPE_DES_CBC_MD5 :
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ret = GSS_S_FAILURE;
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break;
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case KRB5_ENCTYPE_DES3_CBC_MD5 :
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case KRB5_ENCTYPE_DES3_CBC_SHA1 :
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ret = GSS_S_FAILURE;
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break;
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case KRB5_ENCTYPE_ARCFOUR_HMAC_MD5:
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case KRB5_ENCTYPE_ARCFOUR_HMAC_MD5_56:
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ret = _gssapi_unwrap_arcfour (minor_status, ctx, context,
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input_message_buffer, output_message_buffer,
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conf_state, qop_state, key);
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break;
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default :
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abort();
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break;
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}
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krb5_free_keyblock (context, key);
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return ret;
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}
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