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FreeBSD 11.0 - man page for gss_export_sec_context (freebsd section 3)

GSS_EXPORT_SEC_CONTEXT(3)					Programmer's Manual					 GSS_EXPORT_SEC_CONTEXT(3)

gss_export_sec_context -- Transfer a security context to another process
#include <gssapi/gssapi.h> OM_uint32 gss_export_sec_context(OM_uint32 *minor_status, gss_ctx_id_t *context_handle, gss_buffer_t interprocess_token);
Provided to support the sharing of work between multiple processes. This routine will typically be used by the context-acceptor, in an application where a single process receives incoming connection requests and accepts security contexts over them, then passes the established context to one or more other processes for message exchange. gss_export_sec_context() deactivates the security context for the calling process and creates an interprocess token which, when passed to gss_import_sec_context() in another process, will re-activate the context in the second process. Only a single instantiation of a given context may be active at any one time; a subsequent attempt by a context exporter to access the exported security context will fail. The implementation may constrain the set of processes by which the interprocess token may be imported, either as a function of local security policy, or as a result of implementation decisions. For example, some implementations may constrain contexts to be passed only between pro- cesses that run under the same account, or which are part of the same process group. The interprocess token may contain security-sensitive information (for example cryptographic keys). While mechanisms are encouraged to either avoid placing such sensitive information within interprocess tokens, or to encrypt the token before returning it to the application, in a typical object-library GSS-API implementation this may not be possible. Thus the application must take care to protect the interprocess token, and ensure that any process to which the token is transferred is trustworthy. If creation of the interprocess token is successful, the implementation shall deallocate all process-wide resources associated with the secu- rity context, and set the context_handle to GSS_C_NO_CONTEXT. In the event of an error that makes it impossible to complete the export of the security context, the implementation must not return an interprocess token, and should strive to leave the security context referenced by the context_handle parameter untouched. If this is impossible, it is permissible for the implementation to delete the security context, pro- viding it also sets the context_handle parameter to GSS_C_NO_CONTEXT.
minor_status Mechanism specific status code. context_handle Context handle identifying the context to transfer. interprocess_token Token to be transferred to target process. Storage associated with this token must be freed by the application after use with a call to gss_release_buffer().
GSS_S_COMPLETE Successful completion GSS_S_CONTEXT_EXPIRED The context has expired GSS_S_NO_CONTEXT The context was invalid GSS_S_UNAVAILABLE The operation is not supported
gss_import_sec_context(3), gss_release_buffer(3)
RFC 2743 Generic Security Service Application Program Interface Version 2, Update 1 RFC 2744 Generic Security Service API Version 2 : C-bindings
The gss_export_sec_context function first appeared in FreeBSD 7.0.
John Wray, Iris Associates
Copyright (C) The Internet Society (2000). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, pro- vided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organiza- tions, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
January 26, 2010 BSD

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