Heimdal GSS-API functions

Functions | Variables
Heimdal GSS-API functions

## Functions
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_add_oid_set_member (OM_uint32 *minor_status, const gss_OID member_oid, gss_OID_set *oid_set)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_wrap_iov (OM_uint32 *minor_status, gss_ctx_id_t context_handle, int conf_req_flag, gss_qop_t qop_req, int *conf_state, gss_iov_buffer_desc *iov, int iov_count)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_unwrap_iov (OM_uint32 *minor_status, gss_ctx_id_t context_handle, int *conf_state, gss_qop_t *qop_state, gss_iov_buffer_desc *iov, int iov_count)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_wrap_iov_length (OM_uint32 *minor_status, gss_ctx_id_t context_handle, int conf_req_flag, gss_qop_t qop_req, int *conf_state, gss_iov_buffer_desc *iov, int iov_count)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_release_iov_buffer (OM_uint32 *minor_status, gss_iov_buffer_desc *iov, int iov_count)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_canonicalize_name (OM_uint32 *minor_status, gss_const_name_t input_name, const gss_OID mech_type, gss_name_t *output_name)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_display_status (OM_uint32 *minor_status, OM_uint32 status_value, int status_type, const gss_OID mech_type, OM_uint32 *message_context, gss_buffer_t status_string)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_export_name (OM_uint32 *minor_status, gss_const_name_t input_name, gss_buffer_t exported_name)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_import_name (OM_uint32 *minor_status, const gss_buffer_t input_name_buffer, const gss_OID input_name_type, gss_name_t *output_name)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_init_sec_context (OM_uint32 *minor_status, gss_const_cred_id_t initiator_cred_handle, gss_ctx_id_t *context_handle, gss_const_name_t target_name, const gss_OID input_mech_type, OM_uint32 req_flags, OM_uint32 time_req, const gss_channel_bindings_t input_chan_bindings, const gss_buffer_t input_token, gss_OID *actual_mech_type, gss_buffer_t output_token, OM_uint32 *ret_flags, OM_uint32 *time_rec)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_inquire_saslname_for_mech (OM_uint32 *minor_status, const gss_OID desired_mech, gss_buffer_t sasl_mech_name, gss_buffer_t mech_name, gss_buffer_t mech_description)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_inquire_attrs_for_mech (OM_uint32 *minor_status, gss_const_OID mech, gss_OID_set *mech_attr, gss_OID_set *known_mech_attrs)
GSSAPI_LIB_FUNCTION int GSSAPI_LIB_CALL | gss_oid_equal (gss_const_OID a, gss_const_OID b)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_release_cred (OM_uint32 *minor_status, gss_cred_id_t *cred_handle)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_release_name (OM_uint32 *minor_status, gss_name_t *input_name)
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL | gss_wrap (OM_uint32 *minor_status, gss_const_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)

## Variables
gss_OID_desc GSSAPI_LIB_FUNCTION | __gss_c_attr_stream_sizes_oid_desc

## Detailed Description

## Function Documentation

## ◆ gss_add_oid_set_member()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_add_oid_set_member | ( | OM_uint32 * | minor_status,
|  | const gss_OID | member_oid,
|  | gss_OID_set * | oid_set
| ) |  |

Add a oid to the oid set, function does not make a copy of the oid, so the pointer to member_oid needs to be stable for the whole time oid_set is used.

If there is a duplicate member of the oid, the new member is not added to to the set.

Parameters

  minor_status | minor status code.
  member_oid | member to add to the oid set
  oid_set | oid set to add the member too

Returns
  a gss_error code, see gss_display_status() about printing the error code.

## ◆ gss_canonicalize_name()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_canonicalize_name | ( | OM_uint32 * | minor_status,
|  | gss_const_name_t | input_name,
|  | const gss_OID | mech_type,
|  | gss_name_t * | output_name
| ) |  |

gss_canonicalize_name takes a Internal Name (IN) and converts in into a mechanism specific Mechanism Name (MN).

The input name may multiple name, or generic name types.

If the input_name if of the GSS_C_NT_USER_NAME, and the Kerberos mechanism is specified, the resulting MN type is a GSS_KRB5_NT_PRINCIPAL_NAME.

For more information about Internal names and mechanism names.

Parameters

  minor_status | minor status code.
  input_name | name to covert, unchanged by gss_canonicalize_name().
  mech_type | the type to convert Name too.
  output_name | the resulting type, release with gss_release_name(), independent of input_name.

Returns
  a gss_error code, see gss_display_status() about printing the error code.

## ◆ gss_display_status()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_display_status | ( | OM_uint32 * | minor_status,
|  | OM_uint32 | status_value,
|  | int | status_type,
|  | const gss_OID | mech_type,
|  | OM_uint32 * | message_context,
|  | gss_buffer_t | status_string
| ) |  |

Convert a GSS-API status code to text

Parameters

  minor_status | minor status code
  status_value | status value to convert
  status_type | One of: GSS_C_GSS_CODE - status_value is a GSS status code, GSS_C_MECH_CODE - status_value is a mechanism status code
  mech_type | underlying mechanism. Use GSS_C_NO_OID to obtain the system default.
  message_context | state information to extract further messages from the status_value
  status_string | the allocated text representation. Release with gss_release_buffer()

Returns
  a gss_error code.

## ◆ gss_export_name()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_export_name | ( | OM_uint32 * | minor_status,
|  | gss_const_name_t | input_name,
|  | gss_buffer_t | exported_name
| ) |  |

Convert a GGS-API name from internal form to contiguous string.

See also
  gss_import_name(), Internal names and mechanism names.

Parameters

  minor_status | minor status code
  input_name | input name in internal name form
  exported_name | output name in contiguos string form

Returns
  a gss_error code, see gss_display_status() about printing the error code.

## ◆ gss_import_name()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_import_name | ( | OM_uint32 * | minor_status,
|  | const gss_buffer_t | input_name_buffer,
|  | const gss_OID | input_name_type,
|  | gss_name_t * | output_name
| ) |  |

Convert a GGS-API name from contiguous string to internal form.

Type of name and their format:

- GSS_C_NO_OID
- GSS_C_NT_USER_NAME
- GSS_C_NT_HOSTBASED_SERVICE
- GSS_C_NT_EXPORT_NAME
- GSS_C_NT_ANONYMOUS
- GSS_KRB5_NT_PRINCIPAL_NAME

See also
  gss_export_name(), Internal names and mechanism names.

Parameters

  minor_status | minor status code
  input_name_buffer | import name buffer
  input_name_type | type of the import name buffer
  output_name | the resulting type, release with gss_release_name(), independent of input_name

Returns
  a gss_error code, see gss_display_status() about printing the error code.

## ◆ gss_init_sec_context()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_init_sec_context | ( | OM_uint32 * | minor_status,
|  | gss_const_cred_id_t | initiator_cred_handle,
|  | gss_ctx_id_t * | context_handle,
|  | gss_const_name_t | target_name,
|  | const gss_OID | input_mech_type,
|  | OM_uint32 | req_flags,
|  | OM_uint32 | time_req,
|  | const gss_channel_bindings_t | input_chan_bindings,
|  | const gss_buffer_t | input_token,
|  | gss_OID * | actual_mech_type,
|  | gss_buffer_t | output_token,
|  | OM_uint32 * | ret_flags,
|  | OM_uint32 * | time_rec
| ) |  |

As the initiator build a context with an acceptor.

Returns in the major

- GSS_S_COMPLETE - if the context if build
- GSS_S_CONTINUE_NEEDED - if the caller needs to continue another round of gss_i nit_sec_context
- error code - any other error code

Parameters

  minor_status | minor status code.
  initiator_cred_handle | the credential to use when building the context, if GSS_C_NO_CREDENTIAL is passed, the default credential for the mechanism will be used.
  context_handle | a pointer to a context handle, will be returned as long as there is not an error.
  target_name | the target name of acceptor, created using gss_import_name(). The name is can be of any name types the mechanism supports, check supported name types with gss_inquire_names_for_mech().
  input_mech_type | mechanism type to use, if GSS_C_NO_OID is used, Kerberos (GSS_KRB5_MECHANISM) will be tried. Other available mechanism are listed in the GSS-API mechanisms section.
  req_flags | flags using when building the context, see Context creation flags
  time_req | time requested this context should be valid in seconds, common used value is GSS_C_INDEFINITE
  input_chan_bindings | Channel bindings used, if not exepected otherwise, used GSS_C_NO_CHANNEL_BINDINGS
  input_token | input token sent from the acceptor, for the initial packet the buffer of { NULL, 0 } should be used.
  actual_mech_type | the actual mech used, MUST NOT be freed since it pointing to static memory.
  output_token | if there is an output token, regardless of complete, continue_needed, or error it should be sent to the acceptor
  ret_flags | return what flags was negotitated, caller should check if they are accetable. For example, if GSS_C_MUTUAL_FLAG was negotiated with the acceptor or not.
  time_rec | amount of time this context is valid for

Returns
  a gss_error code, see gss_display_status() about printing the error code.

## ◆ gss_inquire_attrs_for_mech()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_inquire_attrs_for_mech | ( | OM_uint32 * | minor_status,
|  | gss_const_OID | mech,
|  | gss_OID_set * | mech_attr,
|  | gss_OID_set * | known_mech_attrs
| ) |  |

List support attributes for a mech and/or all mechanisms.

Parameters

  minor_status | minor status code
  mech | given together with mech_attr will return the list of attributes for mechanism, can optionally be GSS_C_NO_OID.
  mech_attr | see mech parameter, can optionally be NULL, release with gss_release_oid_set().
  known_mech_attrs | all attributes for mechanisms supported, release with gss_release_oid_set().

## ◆ gss_inquire_saslname_for_mech()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_inquire_saslname_for_mech | ( | OM_uint32 * | minor_status,
|  | const gss_OID | desired_mech,
|  | gss_buffer_t | sasl_mech_name,
|  | gss_buffer_t | mech_name,
|  | gss_buffer_t | mech_description
| ) |  |

Returns different protocol names and description of the mechanism.

Parameters

  minor_status | minor status code
  desired_mech | mech list query
  sasl_mech_name | SASL GS2 protocol name
  mech_name | gssapi protocol name
  mech_description | description of gssapi mech

Returns
  returns GSS_S_COMPLETE or a error code.

## ◆ gss_oid_equal()

GSSAPI_LIB_FUNCTION int GSSAPI_LIB_CALL gss_oid_equal | ( | gss_const_OID | a,
|  | gss_const_OID | b
| ) |  |

Compare two GSS-API OIDs with each other.

GSS_C_NO_OID matches nothing, not even it-self.

Parameters

  a | first oid to compare
  b | second oid to compare

Returns
  non-zero when both oid are the same OID, zero when they are not the same.

## ◆ gss_release_cred()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_release_cred | ( | OM_uint32 * | minor_status,
|  | gss_cred_id_t * | cred_handle
| ) |  |

Release a credentials

Its ok to release the GSS_C_NO_CREDENTIAL/NULL credential, it will return a GSS_S_COMPLETE error code. On return cred_handle is set ot GSS_C_NO_CREDENTIAL.

Example:

gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
major = gss_release_cred(&minor, &cred);

Parameters

  minor_status | minor status return code, mech specific
  cred_handle | a pointer to the credential too release

Returns
  an gssapi error code

## ◆ gss_release_iov_buffer()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_release_iov_buffer | ( | OM_uint32 * | minor_status,
|  | gss_iov_buffer_desc * | iov,
|  | int | iov_count
| ) |  |

Free all buffer allocated by gss_wrap_iov() or gss_unwrap_iov() by looking at the GSS_IOV_BUFFER_FLAG_ALLOCATED flag.

## ◆ gss_release_name()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_release_name | ( | OM_uint32 * | minor_status,
|  | gss_name_t * | input_name
| ) |  |

Free a name

import_name can point to NULL or be NULL, or a pointer to a gss_name_t structure. If it was a pointer to gss_name_t, the pointer will be set to NULL on success and failure.

Parameters

  minor_status | minor status code
  input_name | name to free

Returns
  a gss_error code, see gss_display_status() about printing the error code.

## ◆ gss_unwrap_iov()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_unwrap_iov | ( | OM_uint32 * | minor_status,
|  | gss_ctx_id_t | context_handle,
|  | int * | conf_state,
|  | gss_qop_t * | qop_state,
|  | gss_iov_buffer_desc * | iov,
|  | int | iov_count
| ) |  |

Decrypt or verifies the signature on the data.

## ◆ gss_wrap()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_wrap | ( | OM_uint32 * | minor_status,
|  | gss_const_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
| ) |  |

Wrap a message using either confidentiality (encryption + signature) or sealing (signature).

Parameters

  minor_status | minor status code.
  context_handle | context handle.
  conf_req_flag | if non zero, confidentiality is requestd.
  qop_req | type of protection needed, in most cases it GSS_C_QOP_DEFAULT should be passed in.
  input_message_buffer | messages to wrap
  conf_state | returns non zero if confidentiality was honoured.
  output_message_buffer | the resulting buffer, release with gss_release_buffer().

## ◆ gss_wrap_iov()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_wrap_iov | ( | OM_uint32 * | minor_status,
|  | gss_ctx_id_t | context_handle,
|  | int | conf_req_flag,
|  | gss_qop_t | qop_req,
|  | int * | conf_state,
|  | gss_iov_buffer_desc * | iov,
|  | int | iov_count
| ) |  |

Encrypts or sign the data.

This is a more complicated version of gss_wrap(), it allows the caller to use AEAD data (signed header/trailer) and allow greater controll over where the encrypted data is placed.

The maximum packet size is gss_context_stream_sizes.max_msg_size.

The caller needs provide the folloing buffers when using in conf_req_flag=1 mode:

- HEADER (of size gss_context_stream_sizes.header) { DATA or SIGN_ONLY } (optional, zero or more) PADDING (of size gss_context_stream_sizes.blocksize, if zero padding is zero, can be omitted) TRAILER (of size gss_context_stream_sizes.trailer)
- on DCE-RPC mode, the caller can skip PADDING and TRAILER if the DATA elements is padded to a block bountry and header is of at least size gss_context_stream_sizes.header + gss_context_stream_sizes.trailer.

HEADER, PADDING, TRAILER will be shrunken to the size required to transmit any of them too large.

To generate gss_wrap() compatible packets, use: HEADER | DATA | PADDING | TRAILER

When used in conf_req_flag=0,

- HEADER (of size gss_context_stream_sizes.header) { DATA or SIGN_ONLY } (optional, zero or more) PADDING (of size gss_context_stream_sizes.blocksize, if zero padding is zero, can be omitted) TRAILER (of size gss_context_stream_sizes.trailer)

The input sizes of HEADER, PADDING and TRAILER can be fetched using gss_wrap_iov_length() or gss_context_query_attributes().

## ◆ gss_wrap_iov_length()

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL gss_wrap_iov_length | ( | OM_uint32 * | minor_status,
|  | gss_ctx_id_t | context_handle,
|  | int | conf_req_flag,
|  | gss_qop_t | qop_req,
|  | int * | conf_state,
|  | gss_iov_buffer_desc * | iov,
|  | int | iov_count
| ) |  |

Update the length fields in iov buffer for the types:

- GSS_IOV_BUFFER_TYPE_HEADER
- GSS_IOV_BUFFER_TYPE_PADDING
- GSS_IOV_BUFFER_TYPE_TRAILER

Consider using gss_context_query_attributes() to fetch the data instead.

## Variable Documentation

## ◆ __gss_c_attr_stream_sizes_oid_desc

gss_OID_desc GSSAPI_LIB_FUNCTION __gss_c_attr_stream_sizes_oid_desc

Initial value:
=
{10, rk_UNCONST("\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x03")}

Query the context for parameters.

SSPI equivalent if this function is QueryContextAttributes.

- GSS_C_ATTR_STREAM_SIZES data is a gss_context_stream_sizes.