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/*
This file is part of GNUnet.
Copyright (C) 2016 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @author Martin Schanzenbach
*
* @file
* reclaim service; implements identity and personal data sharing
* for GNUnet
*
* @defgroup reclaim service
* @{
*/
#ifndef GNUNET_RECLAIM_SERVICE_H
#define GNUNET_RECLAIM_SERVICE_H
#ifdef __cplusplus
extern "C" {
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
#endif
#include "gnunet_reclaim_lib.h"
#include "gnunet_util_lib.h"
/**
* Version number of the re:claimID API.
*/
#define GNUNET_RECLAIM_VERSION 0x00000001
/**
* Opaque handle to access the service.
*/
struct GNUNET_RECLAIM_Handle;
/**
* Opaque handle for an operation at the re:claimID service.
*/
struct GNUNET_RECLAIM_Operation;
/**
* The authorization ticket. This ticket is meant to be transferred
* out of band to a relying party.
* The contents of a ticket must be protected and should be treated as a
* shared secret between user and relying party.
*/
struct GNUNET_RECLAIM_Ticket
{
/**
* The ticket issuer (= the user)
*/
struct GNUNET_CRYPTO_EcdsaPublicKey identity;
/**
* The ticket audience (= relying party)
*/
struct GNUNET_CRYPTO_EcdsaPublicKey audience;
/**
* The ticket random identifier
*/
struct GNUNET_RECLAIM_Identifier rnd;
};
/**
* Method called when a token has been issued.
* On success returns a ticket that can be given to a relying party
* in order for it retrive identity attributes
*
* @param cls closure
* @param ticket the ticket
*/
typedef void (*GNUNET_RECLAIM_TicketCallback) (
void *cls, const struct GNUNET_RECLAIM_Ticket *ticket);
/**
* Continuation called to notify client about result of the
* operation.
*
* @param cls The callback closure
* @param success #GNUNET_SYSERR on failure
* @param emsg NULL on success, otherwise an error message
*/
typedef void (*GNUNET_RECLAIM_ContinuationWithStatus) (void *cls,
int32_t success,
const char *emsg);
/**
* Callback used to notify the client of attribute results.
*
* @param cls The callback closure
* @param identity The identity authoritative over the attributes
* @param attr The attribute
* @param attestation The attestation for the attribute (may be NULL)
*/
typedef void (*GNUNET_RECLAIM_AttributeResult) (
void *cls, const struct GNUNET_CRYPTO_EcdsaPublicKey *identity,
const struct GNUNET_RECLAIM_Attribute *attr);
/**
* Callback used to notify the client of attribute results.
*
* @param cls The callback closure
* @param identity The identity authoritative over the attributes
* @param attr The attribute
* @param attestation The attestation for the attribute (may be NULL)
*/
typedef void (*GNUNET_RECLAIM_AttributeTicketResult) (
void *cls, const struct GNUNET_CRYPTO_EcdsaPublicKey *identity,
const struct GNUNET_RECLAIM_Attribute *attr,
const struct GNUNET_RECLAIM_Attestation *attestation);
/**
* Callback used to notify the client of attestation results.
*
* @param cls The callback closure
* @param identity The identity authoritative over the attributes
* @param attestation The attestation
* @param attributes the parsed attributes
*/
typedef void (*GNUNET_RECLAIM_AttestationResult) (
void *cls, const struct GNUNET_CRYPTO_EcdsaPublicKey *identity,
const struct GNUNET_RECLAIM_Attestation *attestation,
const struct GNUNET_RECLAIM_AttributeList *attributes);
/**
* Connect to the re:claimID service.
*
* @param cfg Configuration to contact the re:claimID service.
* @return handle to communicate with the service
*/
struct GNUNET_RECLAIM_Handle *
GNUNET_RECLAIM_connect (const struct GNUNET_CONFIGURATION_Handle *cfg);
/**
* Store an attribute. If the attribute is already present,
* it is replaced with the new attribute.
*
* @param h handle to the reclaim service
* @param pkey Private key of the identity to add an attribute to
* @param attr The attribute
* @param exp_interval The relative expiration interval for the attribute
* @param cont Continuation to call when done
* @param cont_cls Closure for @a cont
* @return handle Used to to abort the request
*/
struct GNUNET_RECLAIM_Operation *
GNUNET_RECLAIM_attribute_store (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *pkey,
const struct GNUNET_RECLAIM_Attribute *attr,
const struct GNUNET_TIME_Relative *exp_interval,
GNUNET_RECLAIM_ContinuationWithStatus cont, void *cont_cls);
/**
* Store an attestation. If the attestation is already present,
* it is replaced with the new attestation.
*
* @param h handle to the re:claimID service
* @param pkey private key of the identity
* @param attr the attestation value
* @param exp_interval the relative expiration interval for the attestation
* @param cont continuation to call when done
* @param cont_cls closure for @a cont
* @return handle to abort the request
*/
struct GNUNET_RECLAIM_Operation *
GNUNET_RECLAIM_attestation_store (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *pkey,
const struct GNUNET_RECLAIM_Attestation *attestation,
const struct GNUNET_TIME_Relative *exp_interval,
GNUNET_RECLAIM_ContinuationWithStatus cont,
void *cont_cls);
/**
* Delete an attribute. Tickets used to share this attribute are updated
* accordingly.
*
* @param h handle to the re:claimID service
* @param pkey Private key of the identity to add an attribute to
* @param attr The attribute
* @param cont Continuation to call when done
* @param cont_cls Closure for @a cont
* @return handle Used to to abort the request
*/
struct GNUNET_RECLAIM_Operation *
GNUNET_RECLAIM_attribute_delete (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *pkey,
const struct GNUNET_RECLAIM_Attribute *attr,
GNUNET_RECLAIM_ContinuationWithStatus cont, void *cont_cls);
/**
* Delete an attestation. Tickets used to share this attestation are updated
* accordingly.
*
* @param h handle to the re:claimID service
* @param pkey Private key of the identity to add an attribute to
* @param attr The attestation
* @param cont Continuation to call when done
* @param cont_cls Closure for @a cont
* @return handle Used to to abort the request
*/
struct GNUNET_RECLAIM_Operation *
GNUNET_RECLAIM_attestation_delete (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *pkey,
const struct GNUNET_RECLAIM_Attestation *attr,
GNUNET_RECLAIM_ContinuationWithStatus cont,
void *cont_cls);
/**
* List all attributes for a local identity.
* This MUST lock the `struct GNUNET_RECLAIM_Handle`
* for any other calls than #GNUNET_RECLAIM_get_attributes_next() and
* #GNUNET_RECLAIM_get_attributes_stop. @a proc will be called once
* immediately, and then again after
* #GNUNET_RECLAIM_get_attributes_next() is invoked.
*
* On error (disconnect), @a error_cb will be invoked.
* On normal completion, @a finish_cb proc will be
* invoked.
*
* @param h Handle to the re:claimID service
* @param identity Identity to iterate over
* @param error_cb Function to call on error (i.e. disconnect),
* the handle is afterwards invalid
* @param error_cb_cls Closure for @a error_cb
* @param proc Function to call on each attribute
* @param proc_cls Closure for @a proc
* @param finish_cb Function to call on completion
* the handle is afterwards invalid
* @param finish_cb_cls Closure for @a finish_cb
* @return an iterator Handle to use for iteration
*/
struct GNUNET_RECLAIM_AttributeIterator *
GNUNET_RECLAIM_get_attributes_start (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *identity,
GNUNET_SCHEDULER_TaskCallback error_cb, void *error_cb_cls,
GNUNET_RECLAIM_AttributeResult proc, void *proc_cls,
GNUNET_SCHEDULER_TaskCallback finish_cb, void *finish_cb_cls);
/**
* Calls the record processor specified in #GNUNET_RECLAIM_get_attributes_start
* for the next record.
*
* @param it The iterator
*/
void
GNUNET_RECLAIM_get_attributes_next (
struct GNUNET_RECLAIM_AttributeIterator *it);
/**
* Stops iteration and releases the handle for further calls. Must
* be called on any iteration that has not yet completed prior to calling
* #GNUNET_RECLAIM_disconnect.
*
* @param it the iterator
*/
void
GNUNET_RECLAIM_get_attributes_stop (
struct GNUNET_RECLAIM_AttributeIterator *it);
/**
* List all attestations for a local identity.
* This MUST lock the `struct GNUNET_RECLAIM_Handle`
* for any other calls than #GNUNET_RECLAIM_get_attestations_next() and
* #GNUNET_RECLAIM_get_attestations_stop. @a proc will be called once
* immediately, and then again after
* #GNUNET_RECLAIM_get_attestations_next() is invoked.
*
* On error (disconnect), @a error_cb will be invoked.
* On normal completion, @a finish_cb proc will be
* invoked.
*
* @param h Handle to the re:claimID service
* @param identity Identity to iterate over
* @param error_cb Function to call on error (i.e. disconnect),
* the handle is afterwards invalid
* @param error_cb_cls Closure for @a error_cb
* @param proc Function to call on each attestation
* @param proc_cls Closure for @a proc
* @param finish_cb Function to call on completion
* the handle is afterwards invalid
* @param finish_cb_cls Closure for @a finish_cb
* @return an iterator Handle to use for iteration
*/
struct GNUNET_RECLAIM_AttestationIterator *
GNUNET_RECLAIM_get_attestations_start (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *identity,
GNUNET_SCHEDULER_TaskCallback error_cb,
void *error_cb_cls,
GNUNET_RECLAIM_AttestationResult proc,
void *proc_cls,
GNUNET_SCHEDULER_TaskCallback finish_cb,
void *finish_cb_cls);
/**
* Calls the record processor specified in #GNUNET_RECLAIM_get_attestation_start
* for the next record.
*
* @param it the iterator
*/
void
GNUNET_RECLAIM_get_attestations_next (struct GNUNET_RECLAIM_AttestationIterator *ait);
/**
* Stops iteration and releases the handle for further calls. Must
* be called on any iteration that has not yet completed prior to calling
* #GNUNET_RECLAIM_disconnect.
*
* @param it the iterator
*/
void
GNUNET_RECLAIM_get_attestations_stop (struct GNUNET_RECLAIM_AttestationIterator *ait);
/**
* Issues a ticket to a relying party. The identity may use
* GNUNET_RECLAIM_ticket_consume to consume the ticket
* and retrieve the attributes specified in the attribute list.
*
* @param h the identity provider to use
* @param iss the issuing identity (= the user)
* @param rp the subject of the ticket (= the relying party)
* @param attrs the attributes that the relying party is given access to
* @param cb the callback
* @param cb_cls the callback closure
* @return handle to abort the operation
*/
struct GNUNET_RECLAIM_Operation *
GNUNET_RECLAIM_ticket_issue (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *iss,
const struct GNUNET_CRYPTO_EcdsaPublicKey *rp,
const struct GNUNET_RECLAIM_AttributeList *attrs,
GNUNET_RECLAIM_TicketCallback cb, void *cb_cls);
/**
* Revoked an issued ticket. The relying party will be unable to retrieve
* attributes. Other issued tickets remain unaffected.
* This includes tickets issued to other relying parties as well as to
* other tickets issued to the audience specified in this ticket.
*
* @param h the identity provider to use
* @param identity the issuing identity
* @param ticket the ticket to revoke
* @param cb the callback
* @param cb_cls the callback closure
* @return handle to abort the operation
*/
struct GNUNET_RECLAIM_Operation *
GNUNET_RECLAIM_ticket_revoke (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *identity,
const struct GNUNET_RECLAIM_Ticket *ticket,
GNUNET_RECLAIM_ContinuationWithStatus cb, void *cb_cls);
/**
* Consumes an issued ticket. The ticket is used to retrieve identity
* information from the issuer
*
* @param h the identity provider to use
* @param identity the identity that is the subject of the issued ticket (the
* relying party)
* @param ticket the issued ticket to consume
* @param cb the callback to call
* @param cb_cls the callback closure
* @return handle to abort the operation
*/
struct GNUNET_RECLAIM_Operation *
GNUNET_RECLAIM_ticket_consume (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *identity,
const struct GNUNET_RECLAIM_Ticket *ticket,
GNUNET_RECLAIM_AttributeTicketResult cb, void *cb_cls);
/**
* Lists all tickets that have been issued to remote
* identites (relying parties)
*
* @param h the identity provider to use
* @param identity the issuing identity
* @param error_cb function to call on error (i.e. disconnect),
* the handle is afterwards invalid
* @param error_cb_cls closure for @a error_cb
* @param proc function to call on each ticket; it
* will be called repeatedly with a value (if available)
* @param proc_cls closure for @a proc
* @param finish_cb function to call on completion
* the handle is afterwards invalid
* @param finish_cb_cls closure for @a finish_cb
* @return an iterator handle to use for iteration
*/
struct GNUNET_RECLAIM_TicketIterator *
GNUNET_RECLAIM_ticket_iteration_start (
struct GNUNET_RECLAIM_Handle *h,
const struct GNUNET_CRYPTO_EcdsaPrivateKey *identity,
GNUNET_SCHEDULER_TaskCallback error_cb, void *error_cb_cls,
GNUNET_RECLAIM_TicketCallback proc, void *proc_cls,
GNUNET_SCHEDULER_TaskCallback finish_cb, void *finish_cb_cls);
/**
* Calls the ticket processor specified in
* #GNUNET_RECLAIM_ticket_iteration_start for the next record.
*
* @param it the iterator
*/
void
GNUNET_RECLAIM_ticket_iteration_next (struct GNUNET_RECLAIM_TicketIterator *it);
/**
* Stops iteration and releases the handle for further calls. Must
* be called on any iteration that has not yet completed prior to calling
* #GNUNET_RECLAIM_disconnect.
*
* @param it the iterator
*/
void
GNUNET_RECLAIM_ticket_iteration_stop (struct GNUNET_RECLAIM_TicketIterator *it);
/**
* Disconnect from identity provider service.
*
* @param h identity provider service to disconnect
*/
void
GNUNET_RECLAIM_disconnect (struct GNUNET_RECLAIM_Handle *h);
/**
* Cancel an identity provider operation. Note that the operation MAY still
* be executed; this merely cancels the continuation; if the request
* was already transmitted, the service may still choose to complete
* the operation.
*
* @param op operation to cancel
*/
void
GNUNET_RECLAIM_cancel (struct GNUNET_RECLAIM_Operation *op);
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
/* ifndef GNUNET_RECLAIM_SERVICE_H */
#endif
/** @} */ /* end of group reclaim */
/* end of gnunet_reclaim_service.h */
|