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

GSS_WRAP(3)							Programmer's Manual						       GSS_WRAP(3)

NAME
gss_wrap, gss_seal -- Attach a cryptographic MIC and optionally encrypt a message
SYNOPSIS
#include <gssapi/gssapi.h> OM_uint32 gss_wrap(OM_uint32 *minor_status, const gss_ctx_id_t context_handle, int conf_req_flag, gss_qop_t qop_req, const gss_buffer_t input_message_buffer, int *conf_state, gss_buffer_t output_message_buffer); OM_uint32 gss_seal(OM_uint32 *minor_status, gss_ctx_id_t context_handle, int conf_req_flag, gss_qop_t qop_req, gss_buffer_t input_message_buffer, int *conf_state, gss_buffer_t output_message_buffer);
DESCRIPTION
Attaches a cryptographic MIC and optionally encrypts the specified input_message. The output_message contains both the MIC and the message. The qop_req parameter allows a choice between several cryptographic algorithms, if supported by the chosen mechanism. Since some application-level protocols may wish to use tokens emitted by gss_wrap() to provide "secure framing", implementations must support the wrapping of zero-length messages. The gss_seal() routine is an obsolete variant of gss_wrap(). It is provided for backwards compatibility with applications using the GSS-API V1 interface. A distinct entrypoint (as opposed to #define) is provided, both to allow GSS-API V1 applications to link and to retain the slight parameter type differences between the obsolete versions of this routine and its current form.
PARAMETERS
minor_status Mechanism specific status code. context_handle Identifies the context on which the message will be sent. conf_req_flag Non-zero Both confidentiality and integrity services are requested. Zero Only integrity service is requested. qop_req Specifies required quality of protection. A mechanism-specific default may be requested by setting qop_req to GSS_C_QOP_DEFAULT. If an unsupported protection strength is requested, gss_wrap() will return a major_status of GSS_S_BAD_QOP. input_message_buffer Message to be protected. conf_state Non-zero Confidentiality, data origin authentication and integrity services have been applied. Zero Integrity and data origin services only has been applied. output_message_buffer Buffer to receive protected message. Storage associated with this buffer must be freed by the application after use with a call to gss_release_buffer(3).
RETURN VALUES
GSS_S_COMPLETE Successful completion. GSS_S_CONTEXT_EXPIRED The context has already expired GSS_S_NO_CONTEXT The context_handle parameter did not identify a valid context. GSS_S_BAD_QOP The specified QOP is not supported by the mechanism.
SEE ALSO
gss_release_buffer(3), gss_unwrap(3)
STANDARDS
RFC 2743 Generic Security Service Application Program Interface Version 2, Update 1 RFC 2744 Generic Security Service API Version 2 : C-bindings
HISTORY
The gss_wrap function first appeared in FreeBSD 7.0.
AUTHORS
John Wray, Iris Associates
COPYRIGHT
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.
BSD
January 26, 2010 BSD