globus_gss_assist_get_unwrap (3)

Security Context Creation and Use.

The functions in this section are used to create security contexts and send and receive messages sent over them. They use the functions provided by Token Transport or user-supplied functions to communicate security tokens over the context, looping over continue results from the GSSAPI as needed.

OM_uint32 globus_gss_assist_accept_sec_context (OM_uint32 *minor_status, gss_ctx_id_t *context_handle, const gss_cred_id_tcred_handle, char **src_name_char, OM_uint32 *ret_flags, int *user_to_user_flag, int *token_status, gss_cred_id_t *delegated_cred_handle, int(*)(void *, void **, size_t *)gss_assist_get_token, void *gss_assist_get_context, int(*)(void *, void *, size_t)gss_assist_send_token, void *gss_assist_send_context)

Accept a Security Context. This routine accepts a GSSAPI security context and is called by the gram_gatekeeper. It isolates the GSSAPI from the rest of the gram code.

Initialize a GSSAPI security connection. Used by the server. The context_handle is returned, and there is one for each connection. This routine will take cake of the looping and token processing, using the supplied get_token and send_token routines.

Parameters:

minor_status GSSAPI return code

context_handle pointer to returned context.

cred_handle the cred handle obtained by acquire_cred.

src_name_char Pointer to char string representation of the client which contacted the server. Maybe NULL if not wanted. Should be freed when done.

ret_flags Pointer to which services are available after the connection is established. Maybe NULL if not wanted. We will also use this to pass in flags to the globus version of GSSAPI

user_to_user_flag Pointer to flag to be set if the src_name is the same as our name. (Following are particular to this assist routine)

token_status assist routine get/send token status

delegated_cred_handle pointer to be set to the credential delegated by the client if delegation occurs during the security handshake

gss_assist_get_token a get token routine

gss_assist_get_context first arg for the get token routine

gss_assist_send_token a send token routine

gss_assist_send_context first arg for the send token routine

Returns:

GSS_S_COMPLETE on success Other GSSAPI errors on failure.

OM_uint32 globus_gss_assist_accept_sec_context_async (OM_uint32 *minor_status, gss_ctx_id_t *context_handle, const gss_cred_id_tcred_handle, char **src_name_char, OM_uint32 *ret_flags, int *user_to_user_flag, void *input_buffer, size_tinput_buffer_len, void **output_bufferp, size_t *output_buffer_lenp, gss_cred_id_t *delegated_cred_handle)

Accept a Security Context Without Blocking. This is a asynchronous version of the globus_gss_assist_accept_sec_context() function. Instead of looping itself it passes in and out the read and written buffers and the calling application is responsible for doing the I/O directly.

Parameters:

minor_status GSSAPI return code

context_handle pointer to returned context.

cred_handle the cred handle obtained by acquire_cred.

src_name_char Pointer to char string representation of the client which contacted the server. Maybe NULL if not wanted. Should be freed when done.

ret_flags Pointer to which services are available after the connection is established. Maybe NULL if not wanted. We will also use this to pass in flags to the Globus version of GSSAPI

user_to_user_flag Pointer to flag to be set if the src_name is the same as our name.

input_buffer pointer to a buffer received from peer.

input_buffer_len length of the buffer input_buffer.

output_bufferp pointer to a pointer which will be filled in with a pointer to a allocated block of memory. If non-NULL the contents of this block should be written to the peer where they will be fed into the globus_gss_assist_init_sec_context_async() function.

output_buffer_lenp pointer to an integer which will be filled in with the length of the allocated output buffer pointed to by *output_bufferp.

delegated_cred_handle pointer to be set to the credential delegated by the client if delegation occurs during the security handshake

Returns:

GSS_S_COMPLETE on successful completion when this function does not need to be called again.

GSS_S_CONTINUE_NEEDED when *output_bufferp should be sent to the peer and a new input_buffer read and this function called again.

Other GSSAPI errors on failure.

OM_uint32 globus_gss_assist_export_sec_context (OM_uint32 *minor_status, gss_ctx_id_t *context_handle, int *token_status, intfdp, FILE *fperr)

Export the security context from a file

Parameters:

minor_status GSSAPI return code. This is a Globus Error code (or GLOBUS_SUCCESS) cast to a OM_uint32 pointer. If an error has occurred, the resulting error (from calling globus_error_get on this variable) needs to be freed by the caller

context_handle The context to export

token_status Errors that occurred while reading from the file

fdp the file descriptor pointing to a file containing the security context

fperr FILE * to write error messages

Returns:

the major status

OM_uint32 globus_gss_assist_get_unwrap (OM_uint32 *minor_status, const gss_ctx_id_tcontext_handle, char **data, size_t *length, int *token_status, int(*)(void *, void **, size_t *)gss_assist_get_token, void *gss_assist_get_context, FILE *fperr)

Get Unwrap. Gets a token using the specific tokenizing functions, and performs the GSS unwrap of that token

See also:

gss_unwrap

Parameters:

minor_status GSSAPI return code,

See also:

gss_unwrap

Parameters:

context_handle the context

data pointer to be set to the unwrapped application data. This must be freed by the caller.

length pointer to be set to the length of the data byte array.

token_status assist routine get/send token status

gss_assist_get_token a detokenizing routine

gss_assist_get_context first arg for above routine

fperr error stream to print to

Returns:

GSS_S_COMPLETE on sucess Other gss errors on failure.

OM_uint32 globus_gss_assist_import_sec_context (OM_uint32 *minor_status, gss_ctx_id_t *context_handle, int *token_status, intfdp, FILE *fperr)

Import the security context from a file

Parameters:

minor_status GSSAPI return code. This is a Globus Error code (or GLOBUS_SUCCESS) cast to a OM_uint32 pointer. If an error has occurred, the resulting error (from calling globus_error_get on this variable) needs to be freed by the caller

context_handle The imported context

token_status Errors that occurred while reading from the file

fdp the file descriptor pointing to a file containing the security context

fperr FILE * to write error messages

Returns:

the major status

OM_uint32 globus_gss_assist_init_sec_context (OM_uint32 *minor_status, const gss_cred_id_tcred_handle, gss_ctx_id_t *context_handle, char *target_name_char, OM_uint32req_flags, OM_uint32 *ret_flags, int *token_status, int(*)(void *, void **, size_t *)gss_assist_get_token, void *gss_assist_get_context, int(*)(void *, void *, size_t)gss_assist_send_token, void *gss_assist_send_context)

Initialize a GSSAPI security connection. Used by the client. The context_handle is returned, and there is one for each connection. This routine will take cake of the looping and token processing, using the supplied get_token and send_token routines.

Parameters:

minor_status GSSAPI return code. The new minor_status is a globus_result_t cast to an OM_uint32. If the call was successful, the minor status is equivalent to GLOBUS_SUCCESS. Otherwise, it is a globus error object ID that can be passed to globus_error_get to get the error object. The error object needs to be freed with globus_object_free.

cred_handle the cred handle obtained by acquire_cred.

context_handle pointer to returned context.

target_name_char char string representation of the server to be contacted.

req_flags request flags, such as GSS_C_DELEG_FLAG for delegation and the GSS_C_MUTUAL_FLAG for mutual authentication.

ret_flags Pointer to which services are available after the connection is established. Maybe NULL if not wanted.

The following are particular to this assist routine:

Parameters:

token_status the assist routine's get/send token status

gss_assist_get_token function pointer for getting the token

gss_assist_get_context first argument passed to the gss_assist_get_token function

gss_assist_send_token function pointer for setting the token

gss_assist_send_context first argument passed to the gss_assist_set_token function pointer

Returns:

The major status

OM_uint32 globus_gss_assist_init_sec_context_async (OM_uint32 *minor_status, const gss_cred_id_tcred_handle, gss_ctx_id_t *context_handle, char *target_name_char, OM_uint32req_flags, OM_uint32 *ret_flags, void *input_buffer, size_tinput_buffer_len, void **output_bufferp, size_t *output_buffer_lenp)

This is a asynchronous version of the globus_gss_assist_init_sec_context() function. Instead of looping itself it passes in and out the read and written buffers and the calling application is responsible for doing the I/O directly.

Parameters:

minor_status GSSAPI return code. The new minor status is a globus_result_t cast to a OM_uint32. If an error occurred (GSS_ERROR(major_status)) the minor_status is a globus error object id. The error object can be obtained via globus_error_get and should be destroyed with globus_object_free when no longer needed. If no error occurred, the minor status is equal to GLOBUS_SUCCESS.

cred_handle the cred handle obtained by acquire_cred.

context_handle pointer to returned context.

target_name_char char string representation of the server to be contacted.

req_flags request flags, such as GSS_C_DELEG_FLAG for delegation and the GSS_C_MUTUAL_FLAG for mutual authentication.

ret_flags Pointer to which services are available after the connection is established. Maybe NULL if not wanted.

input_buffer pointer to a buffer received from peer. Should be NULL on first call.

input_buffer_len length of the buffer input_buffer. Should be zero on first call.

output_bufferp pointer to a pointer which will be filled in with a pointer to a allocated block of memory. If non-NULL the contents of this block should be written to the peer where they will be fed into the gss_assist_init_sec_context_async() function.

output_buffer_lenp pointer to an integer which will be filled in with the length of the allocated output buffer pointed to by *output_bufferp.

Returns:

GSS_S_COMPLETE on successful completion when this function does not need to be called again.

GSS_S_CONTINUE_NEEDED when *output_bufferp should be sent to the peer and a new input_buffer read and this function called again.

Other gss errors on failure.

OM_uint32 globus_gss_assist_will_handle_restrictions (OM_uint32 *minor_status, gss_ctx_id_t *context_handle)

Sets the context to handle restrictions

Parameters:

minor_status the resulting minor status from setting the context handle

context_handle the context handle to set the minor status of

Returns:

the major status from setting the context

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