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/* Copyright 2010 Justin Erenkrantz and Greg Stein
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef AUTH_KERB_H
#define AUTH_KERB_H
#include <apr.h>
#include <apr_pools.h>
#if defined(SERF_HAVE_SSPI)
#define SERF_HAVE_KERB
#define SERF_USE_SSPI
#elif defined(SERF_HAVE_GSSAPI)
#define SERF_HAVE_KERB
#define SERF_USE_GSSAPI
#endif
#ifdef SERF_HAVE_KERB
#ifdef __cplusplus
extern "C" {
#endif
typedef struct serf__kerb_context_t serf__kerb_context_t;
typedef struct serf__kerb_buffer_t {
apr_size_t length;
void *value;
} serf__kerb_buffer_t;
/* Create outbound security context.
*
* All temporary allocations will be performed in SCRATCH_POOL, while security
* context will be allocated in result_pool and will be destroyed automatically
* on RESULT_POOL cleanup.
*
*/
apr_status_t
serf__kerb_create_sec_context(serf__kerb_context_t **ctx_p,
apr_pool_t *scratch_pool,
apr_pool_t *result_pool);
/* Initialize outbound security context.
*
* The function is used to build a security context between the client
* application and a remote peer.
*
* CTX is pointer to existing context created using
* serf__kerb_create_sec_context() function.
*
* SERVICE is name of Kerberos service name. Usually 'HTTP'. HOSTNAME is
* canonical name of destination server. Caller should resolve server's alias
* to canonical name.
*
* INPUT_BUF is pointer structure describing input token if any. Should be
* zero length on first call.
*
* OUTPUT_BUF will be populated with pointer to output data that should send
* to destination server. This buffer will be automatically freed on
* RESULT_POOL cleanup.
*
* All temporary allocations will be performed in SCRATCH_POOL.
*
* Return value:
* - APR_EAGAIN The client must send the output token to the server and wait
* for a return token.
*
* - APR_SUCCESS The security context was successfully initialized. There is no
* need for another serf__kerb_init_sec_context call. If the function returns
* an output token, that is, if the OUTPUT_BUF is of nonzero length, that
* token must be sent to the server.
*
* Other returns values indicates error.
*/
apr_status_t
serf__kerb_init_sec_context(serf__kerb_context_t *ctx,
const char *service,
const char *hostname,
serf__kerb_buffer_t *input_buf,
serf__kerb_buffer_t *output_buf,
apr_pool_t *scratch_pool,
apr_pool_t *result_pool
);
/*
* Reset a previously created security context so we can start with a new one.
*
* This is triggered when the server requires per-request authentication,
* where each request requires a new security context.
*/
apr_status_t
serf__kerb_reset_sec_context(serf__kerb_context_t *ctx);
#ifdef __cplusplus
}
#endif
#endif /* SERF_HAVE_KERB */
#endif /* !AUTH_KERB_H */
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