(gss_ctx_id_t, read) Identifies the context on
which the message arrived.
const gss_buffer_t input_message_buffer
(buffer, opaque, read) Protected message.
(buffer, opaque, modify) Buffer to receive
unwrapped message. Storage associated with this buffer must be
freed by the application after use use with a call to
int * conf_state
(boolean, modify, optional) Non-zero - Confidentiality
and integrity protection were used. Zero - Integrity service only
was used. Specify NULL if not required.
gss_qop_t * qop_state
(gss_qop_t, modify, optional) Quality of protection
provided. Specify NULL if not required.
Converts a message previously protected by gss_wrap back to a
usable form, verifying the embedded MIC. The conf_state parameter
indicates whether the message was encrypted; the qop_state
parameter indicates the strength of protection that was used to
provide the confidentiality and integrity services.
Since some application-level protocols may wish to use tokens
emitted by gss_wrap() to provide "secure framing", implementations
must support the wrapping and unwrapping of zero-length messages.
`GSS_S_COMPLETE`: Successful completion.
`GSS_S_DEFECTIVE_TOKEN`: The token failed consistency checks.
`GSS_S_BAD_SIG`: The MIC was incorrect.
`GSS_S_DUPLICATE_TOKEN`: The token was valid, and contained a
correct MIC for the message, but it had already been processed.
`GSS_S_OLD_TOKEN`: The token was valid, and contained a correct MIC
for the message, but it is too old to check for duplication.
`GSS_S_UNSEQ_TOKEN`: The token was valid, and contained a correct
MIC for the message, but has been verified out of sequence; a later
token has already been received.
`GSS_S_GAP_TOKEN`: The token was valid, and contained a correct MIC
for the message, but has been verified out of sequence; an earlier
expected token has not yet been received.
`GSS_S_CONTEXT_EXPIRED`: The context has already expired.
`GSS_S_NO_CONTEXT`: The context_handle parameter did not identify a