// This file is under GNU General Public License 3.0

// see LICENSE.txt

#include "platform.h"

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

#include <assert.h>

#include <ctype.h>

#include "pEp_internal.h"

#include "keymanagement.h"

#include "sync_fsm.h"

#include "blacklist.h"

#ifndef EMPTYSTR

#define EMPTYSTR(STR) ((STR) == NULL || (STR)[0] == '\0')

#endif

#define KEY_EXPIRE_DELTA (60 * 60 * 24 * 365)

PEP_STATUS elect_pubkey(

        PEP_SESSION session, pEp_identity * identity

    )

{

    PEP_STATUS status;

    stringlist_t *keylist = NULL;

    char *_fpr = "";

    identity->comm_type = PEP_ct_unknown;

    status = find_keys(session, identity->address, &keylist);

    assert(status != PEP_OUT_OF_MEMORY);

    if (status == PEP_OUT_OF_MEMORY)

        return PEP_OUT_OF_MEMORY;

    stringlist_t *_keylist;

    for (_keylist = keylist; _keylist && _keylist->value; _keylist = _keylist->next) {

        PEP_comm_type _comm_type_key;

        status = get_key_rating(session, _keylist->value, &_comm_type_key);

        assert(status != PEP_OUT_OF_MEMORY);

        if (status == PEP_OUT_OF_MEMORY) {

            free_stringlist(keylist);

            return PEP_OUT_OF_MEMORY;

        }

        if (_comm_type_key != PEP_ct_compromized &&

            _comm_type_key != PEP_ct_unknown)

        {

            if (identity->comm_type == PEP_ct_unknown ||

                _comm_type_key > identity->comm_type)

            {

                bool blacklisted;

                status = blacklist_is_listed(session, _keylist->value, &blacklisted);

                if (status == PEP_STATUS_OK && !blacklisted) {

                    identity->comm_type = _comm_type_key;

                    _fpr = _keylist->value;

                }

            }

        }

    }

//    if (_fpr) {

    free(identity->fpr);

    identity->fpr = strdup(_fpr);

    if (identity->fpr == NULL) {

        free_stringlist(keylist);

        return PEP_OUT_OF_MEMORY;

    }

//    }

    free_stringlist(keylist);

    return PEP_STATUS_OK;

}

PEP_STATUS _myself(PEP_SESSION session, pEp_identity * identity, bool do_keygen, bool ignore_flags);

DYNAMIC_API PEP_STATUS update_identity(

        PEP_SESSION session, pEp_identity * identity

    )

{

    pEp_identity *stored_identity = NULL;

    pEp_identity *temp_id = NULL;

    PEP_STATUS status;

    assert(session);

    assert(identity);

    assert(!EMPTYSTR(identity->address));

    if (!(session && identity && !EMPTYSTR(identity->address)))

        return ADD_TO_LOG(PEP_ILLEGAL_VALUE);

    if (_identity_me(identity)) {

        return _myself(session, identity, false, true);

    }

    int _no_user_id = EMPTYSTR(identity->user_id);

    int _did_elect_new_key = 0;

    if (_no_user_id)

    {

        status = get_identity(session, identity->address, PEP_OWN_USERID,

                &stored_identity);

        if (status == PEP_STATUS_OK) {

            free_identity(stored_identity);

            return _myself(session, identity, false, true);

        }

        free(identity->user_id);

        identity->user_id = calloc(1, strlen(identity->address) + 6);

        if (!identity->user_id)

        {

            return PEP_OUT_OF_MEMORY;

        }

        snprintf(identity->user_id, strlen(identity->address) + 6,

                 "TOFU_%s", identity->address);

    }

    status = get_identity(session,

                          identity->address,

                          identity->user_id,

                          &stored_identity);

    assert(status != PEP_OUT_OF_MEMORY);

    if (status == PEP_OUT_OF_MEMORY)

        goto exit_free;

    temp_id = identity_dup(identity);

    /* We don't take given fpr. 

       In case there's no acceptable stored fpr, it will be elected. */

    free(temp_id->fpr);

    temp_id->fpr = NULL;

    temp_id->comm_type = PEP_ct_unknown;

    if (stored_identity) {

        bool dont_use_stored_fpr = true;

        /* if we have a stored_identity fpr */

        if (!EMPTYSTR(stored_identity->fpr)) {

            bool revoked = false;

            status = key_revoked(session, stored_identity->fpr, &revoked);

            if (status != PEP_STATUS_OK || revoked)

                dont_use_stored_fpr = true;

            if (revoked) {

                // Do stuff

                status = update_trust_for_fpr(session, stored_identity->fpr, PEP_ct_key_revoked);

                // What to do on failure? FIXME

                status = replace_identities_fpr(session, stored_identity->fpr, "");

            }

            else {    

                status = blacklist_is_listed(session, stored_identity->fpr, &dont_use_stored_fpr);

                if (status != PEP_STATUS_OK)

                    dont_use_stored_fpr = true; 

            }

        }

        if (!dont_use_stored_fpr) {

            /* Check stored comm_type */

            PEP_comm_type _comm_type_key;

            status = get_key_rating(session, stored_identity->fpr, &_comm_type_key);

            assert(status != PEP_OUT_OF_MEMORY);

            if (status == PEP_OUT_OF_MEMORY) {

                goto exit_free;

            }

            if (status == PEP_KEY_NOT_FOUND){

                /* stored key was deleted from keyring. any other candidate ?*/

                status = elect_pubkey(session, temp_id);

                if (status != PEP_STATUS_OK) {

                    goto exit_free;

                } else {

                    _did_elect_new_key = 1;

                }

            } else {

                temp_id->fpr = strdup(stored_identity->fpr);

                assert(temp_id->fpr);

                if (temp_id->fpr == NULL) {

                    status = PEP_OUT_OF_MEMORY;

                    goto exit_free;

                }

                if (_comm_type_key < PEP_ct_unconfirmed_encryption) {

                    /* if key not good anymore, 

                       downgrade eventually trusted comm_type */

                    temp_id->comm_type = _comm_type_key;

                } else {

                    /* otherwise take stored comm_type as-is except if 

                       is unknown or is expired (but key not expired anymore) */

                    temp_id->comm_type = stored_identity->comm_type;

                    if (temp_id->comm_type == PEP_ct_unknown ||

                        temp_id->comm_type == PEP_ct_key_expired) {

                        temp_id->comm_type = _comm_type_key;

                    }

                }

            }

        }

        else {

            status = elect_pubkey(session, temp_id);

            if (status != PEP_STATUS_OK){

                goto exit_free;

            } else {

                _did_elect_new_key = 1;

            }

        }

        /* ok, from here on out, use temp_id */

        /* At this point, we either have a non-blacklisted fpr we can work */

        /* with, or we've got nada.                                        */

        if (EMPTYSTR(temp_id->fpr)) {

            /* nada : set comm_type accordingly */

            temp_id->comm_type = PEP_ct_key_not_found;

        }

        if (EMPTYSTR(temp_id->username)) {

            free(temp_id->username);

            temp_id->username = strdup(stored_identity->username);

            assert(temp_id->username);

            if (temp_id->username == NULL){

                status = PEP_OUT_OF_MEMORY;

                goto exit_free;

            }

        }

        if (temp_id->lang[0] == 0) {

            temp_id->lang[0] = stored_identity->lang[0];

            temp_id->lang[1] = stored_identity->lang[1];

            temp_id->lang[2] = 0;

        }

        temp_id->flags = stored_identity->flags;

    }

    else /* stored_identity == NULL */ {

        temp_id->flags = 0;

        /* We elect a pubkey */

        status = elect_pubkey(session, temp_id);

        if (status != PEP_STATUS_OK)

            goto exit_free;

        /* Work with the elected key */

        if (!EMPTYSTR(temp_id->fpr)) {

            PEP_comm_type _comm_type_key = temp_id->comm_type;

            _did_elect_new_key = 1;

            // We don't want to lose a previous trust entry!!!

            status = get_trust(session, temp_id);

            bool has_trust_status = (status == PEP_STATUS_OK);

            if (!has_trust_status)

                temp_id->comm_type = _comm_type_key;

        }

    }

    if (temp_id->fpr == NULL) {

        temp_id->fpr = strdup("");

        if (temp_id->fpr == NULL) {

            status = PEP_OUT_OF_MEMORY;

            goto exit_free;

        }

    }

    status = PEP_STATUS_OK;

    if (temp_id->comm_type != PEP_ct_unknown && !EMPTYSTR(temp_id->user_id)) {

        if (EMPTYSTR(temp_id->username)) { // mitigate

            free(temp_id->username);

            temp_id->username = strdup("anonymous");

            assert(temp_id->username);

            if (temp_id->username == NULL){

                status = PEP_OUT_OF_MEMORY;

                goto exit_free;

            }

        }

        // Identity doesn't get stored if call was just about checking existing

        // user by address (i.e. no user id given but already stored)

        if (!(_no_user_id && stored_identity) || _did_elect_new_key)

        {

            status = set_identity(session, temp_id);

            assert(status == PEP_STATUS_OK);

            if (status != PEP_STATUS_OK) {

                goto exit_free;

            }

        }

    }

    if (temp_id->comm_type != PEP_ct_compromized &&

            temp_id->comm_type < PEP_ct_strong_but_unconfirmed)

        if (session->examine_identity)

            session->examine_identity(temp_id, session->examine_management);

    /* ok, we got to the end. So we can assign the output identity */

    free(identity->address);

    identity->address = strdup(temp_id->address);

    free(identity->fpr);

    identity->fpr = strdup(temp_id->fpr);

    free(identity->user_id);

    identity->user_id = strdup(temp_id->user_id);

    free(identity->username);

    identity->username = strdup(temp_id->username ? temp_id->username : "anonymous");

    identity->comm_type = temp_id->comm_type;

    identity->lang[0] = temp_id->lang[0];

    identity->lang[1] = temp_id->lang[1];

    identity->lang[2] = 0;

    identity->flags = temp_id->flags;

exit_free :

    free_identity(stored_identity);

    free_identity(temp_id);

    return ADD_TO_LOG(status);

}

PEP_STATUS elect_ownkey(

        PEP_SESSION session, pEp_identity * identity

    )

{

    PEP_STATUS status;

    stringlist_t *keylist = NULL;

    free(identity->fpr);

    identity->fpr = NULL;

    status = find_private_keys(session, identity->address, &keylist);

    assert(status != PEP_OUT_OF_MEMORY);

    if (status == PEP_OUT_OF_MEMORY)

        return PEP_OUT_OF_MEMORY;

    if (keylist != NULL && keylist->value != NULL)

    {

        char *_fpr = NULL;

        identity->comm_type = PEP_ct_unknown;

        stringlist_t *_keylist;

        for (_keylist = keylist; _keylist && _keylist->value; _keylist = _keylist->next) {

            bool is_own = false;

            status = own_key_is_listed(session, _keylist->value, &is_own);

            assert(status == PEP_STATUS_OK);

            if (status != PEP_STATUS_OK) {

                free_stringlist(keylist);

                return status;

            }

            if (is_own)

            {

                PEP_comm_type _comm_type_key;

                status = get_key_rating(session, _keylist->value, &_comm_type_key);

                assert(status != PEP_OUT_OF_MEMORY);

                if (status == PEP_OUT_OF_MEMORY) {

                    free_stringlist(keylist);

                    return PEP_OUT_OF_MEMORY;

                }

                if (_comm_type_key != PEP_ct_compromized &&

                    _comm_type_key != PEP_ct_unknown)

                {

                    if (identity->comm_type == PEP_ct_unknown ||

                        _comm_type_key > identity->comm_type)

                    {

                        identity->comm_type = _comm_type_key;

                        _fpr = _keylist->value;

                    }

                }

            }

        }

        if (_fpr)

        {

            identity->fpr = strdup(_fpr);

            assert(identity->fpr);

            if (identity->fpr == NULL)

            {

                free_stringlist(keylist);

                return PEP_OUT_OF_MEMORY;

            }

        }

        free_stringlist(keylist);

    }

    return PEP_STATUS_OK;

}

PEP_STATUS _has_usable_priv_key(PEP_SESSION session, char* fpr,

                                bool* is_usable) {

    bool dont_use_fpr = true;

    PEP_STATUS status = blacklist_is_listed(session, fpr, &dont_use_fpr);

    if (status == PEP_STATUS_OK && !dont_use_fpr) {

        // Make sure there is a *private* key associated with this fpr

        bool has_private = false;

        status = contains_priv_key(session, fpr, &has_private);

        if (status == PEP_STATUS_OK)

            dont_use_fpr = !has_private;

    }

    *is_usable = !dont_use_fpr;

    return ADD_TO_LOG(status);

}

PEP_STATUS _myself(PEP_SESSION session, pEp_identity * identity, bool do_keygen, bool ignore_flags)

{

    pEp_identity *stored_identity = NULL;

    PEP_STATUS status;

    assert(session);

    assert(identity);

    assert(!EMPTYSTR(identity->address));

    assert(EMPTYSTR(identity->user_id) ||

           strcmp(identity->user_id, PEP_OWN_USERID) == 0);

    if (!(session && identity && !EMPTYSTR(identity->address) &&

            (EMPTYSTR(identity->user_id) ||

            strcmp(identity->user_id, PEP_OWN_USERID) == 0)))

        return ADD_TO_LOG(PEP_ILLEGAL_VALUE);

    identity->comm_type = PEP_ct_pEp;

    if(ignore_flags)

        identity->flags = 0;

    if (EMPTYSTR(identity->user_id))

    {

        free(identity->user_id);

        identity->user_id = strdup(PEP_OWN_USERID);

        assert(identity->user_id);

        if (identity->user_id == NULL)

            return PEP_OUT_OF_MEMORY;

    }

    if (EMPTYSTR(identity->username))

    {

        free(identity->username);

        identity->username = strdup("anonymous");

        assert(identity->username);

        if (identity->username == NULL)

            return PEP_OUT_OF_MEMORY;

    }

    DEBUG_LOG("myself", "debug", identity->address);

    status = get_identity(session,

                          identity->address,

                          identity->user_id,

                          &stored_identity);

    assert(status != PEP_OUT_OF_MEMORY);

    if (status == PEP_OUT_OF_MEMORY)

        return PEP_OUT_OF_MEMORY;

    bool dont_use_stored_fpr = true;

    bool dont_use_input_fpr = true;

    if (stored_identity)

    {

        if (EMPTYSTR(identity->fpr)) {

            bool has_private = false;

            status = _has_usable_priv_key(session, stored_identity->fpr, &has_private); 

            // N.B. has_private is never true if the returned status is not PEP_STATUS_OK

            if (has_private) {

                identity->fpr = strdup(stored_identity->fpr);

                assert(identity->fpr);

                if (identity->fpr == NULL)

                {

                    return PEP_OUT_OF_MEMORY;

                }

                dont_use_stored_fpr = false;

            }

        }

        identity->flags = (identity->flags & 255) | stored_identity->flags;

        free_identity(stored_identity);

    }

    if (dont_use_stored_fpr && !EMPTYSTR(identity->fpr))

    {

        // App must have a good reason to give fpr, such as explicit

        // import of private key, or similar.

        // Take given fpr as-is.

        // BUT:

        // First check to see if it's blacklisted or private part is missing?

        bool has_private = false;

        status = _has_usable_priv_key(session, identity->fpr, &has_private); 

        // N.B. has_private is never true if the returned status is not PEP_STATUS_OK

        if (has_private) {

            dont_use_input_fpr = false;

        }

    }

    // Ok, we failed to get keys either way, so let's elect one.

    if (dont_use_input_fpr && dont_use_stored_fpr)

    {

        status = elect_ownkey(session, identity);

        assert(status == PEP_STATUS_OK);

        if (status != PEP_STATUS_OK) {

            return ADD_TO_LOG(status);

        }

        bool has_private = false;

        if (identity->fpr) {

            // ok, we elected something.

            // elect_ownkey only returns private keys, so we don't check again.

            // Check to see if it's blacklisted

            bool listed;

            status = blacklist_is_listed(session, identity->fpr, &listed); 

            if (status == PEP_STATUS_OK)

                has_private = !listed;

        }

        if (has_private) {

            dont_use_input_fpr = false;

        }

        else { // OK, we've tried everything. Time to generate new keys.

            free(identity->fpr); // It can stay in this state (unallocated) because we'll generate a new key 

            identity->fpr = NULL;

        }

    }

    bool revoked = false;

    char *r_fpr = NULL;

    if (!EMPTYSTR(identity->fpr))

    {

        status = key_revoked(session, identity->fpr, &revoked);

        if (status != PEP_STATUS_OK) 

        {

            return ADD_TO_LOG(status);

        }

    }

    bool new_key_generated = false;

    if (EMPTYSTR(identity->fpr) || revoked)

    {

        if(!do_keygen){

            return ADD_TO_LOG(PEP_GET_KEY_FAILED);

        }

        if(revoked)

        {

            r_fpr = identity->fpr;

            identity->fpr = NULL;

        }

        DEBUG_LOG("generating key pair", "debug", identity->address);

        status = generate_keypair(session, identity);

        assert(status != PEP_OUT_OF_MEMORY);

        if (status != PEP_STATUS_OK) {

            char buf[11];

            snprintf(buf, 11, "%d", status);

            DEBUG_LOG("generating key pair failed", "debug", buf);

            if(revoked && r_fpr)

                free(r_fpr);

            return ADD_TO_LOG(status);

        }

        new_key_generated = true;

        if(revoked)

        {

            status = set_revoked(session, r_fpr,

                                 identity->fpr, time(NULL));

            free(r_fpr);

            if (status != PEP_STATUS_OK) {

                return ADD_TO_LOG(status);

            }

        }

    }

    else

    {

        bool expired;

        status = key_expired(session, identity->fpr, 

                             time(NULL) + (7*24*3600), // In a week

                             &expired);

        assert(status == PEP_STATUS_OK);

        if (status != PEP_STATUS_OK) {

            return ADD_TO_LOG(status);

        }

        if (status == PEP_STATUS_OK && expired) {

            timestamp *ts = new_timestamp(time(NULL) + KEY_EXPIRE_DELTA);

            renew_key(session, identity->fpr, ts);

            free_timestamp(ts);

        }

    }

    if (!identity->username)

        identity->username = strdup("");

    status = set_identity(session, identity);

    assert(status == PEP_STATUS_OK);

    if (status != PEP_STATUS_OK) {

        return status;

    }

    if(new_key_generated)

    {

        // if a state machine for keysync is in place, inject notify

        status = inject_DeviceState_event(session, KeyGen, NULL, NULL);

        if (status == PEP_OUT_OF_MEMORY){

            return PEP_OUT_OF_MEMORY;

        }

    }

    return ADD_TO_LOG(PEP_STATUS_OK);

}

DYNAMIC_API PEP_STATUS myself(PEP_SESSION session, pEp_identity * identity)

{

    return ADD_TO_LOG(_myself(session, identity, true, false));

}

DYNAMIC_API PEP_STATUS register_examine_function(

        PEP_SESSION session, 

        examine_identity_t examine_identity,

        void *management

    )

{

    assert(session);

    if (!session)

        return PEP_ILLEGAL_VALUE;

    session->examine_management = management;

    session->examine_identity = examine_identity;

    return PEP_STATUS_OK;

}

DYNAMIC_API PEP_STATUS do_keymanagement(

        retrieve_next_identity_t retrieve_next_identity,

        void *management

    )

{

    PEP_SESSION session;

    pEp_identity *identity;

    PEP_STATUS status;

    assert(retrieve_next_identity);

    assert(management);

    if (!retrieve_next_identity || !management)

        return PEP_ILLEGAL_VALUE;

    status = init(&session);

    assert(status == PEP_STATUS_OK);

    if (status != PEP_STATUS_OK)

        return status;

    log_event(session, "keymanagement thread started", "pEp engine", NULL, NULL);

    while ((identity = retrieve_next_identity(management))) 

    {

        assert(identity->address);

        if(identity->address)

        {

            DEBUG_LOG("do_keymanagement", "retrieve_next_identity", identity->address);

            if (_identity_me(identity)) {

                status = myself(session, identity);

            } else {

                status = recv_key(session, identity->address);

            }

            assert(status != PEP_OUT_OF_MEMORY);

            if(status == PEP_OUT_OF_MEMORY)

                return PEP_OUT_OF_MEMORY;

        }

        free_identity(identity);

    }

    log_event(session, "keymanagement thread shutdown", "pEp engine", NULL, NULL);

    release(session);

    return PEP_STATUS_OK;

}

DYNAMIC_API PEP_STATUS key_mistrusted(

        PEP_SESSION session,

        pEp_identity *ident

    )

{

    PEP_STATUS status = PEP_STATUS_OK;

    assert(session);

    assert(ident);

    assert(!EMPTYSTR(ident->fpr));

    if (!(session && ident && ident->fpr))

        return PEP_ILLEGAL_VALUE;

    if (_identity_me(ident))

    {

        revoke_key(session, ident->fpr, NULL);

        myself(session, ident);

    }

    else

    {

        // for undo

        if (session->cached_mistrusted)

            free(session->cached_mistrusted);

        session->cached_mistrusted = identity_dup(ident);

        status = mark_as_compromized(session, ident->fpr);

    }

    return status;

}

DYNAMIC_API PEP_STATUS undo_last_mistrust(PEP_SESSION session) {

    assert(session);

    if (!session)

        return PEP_ILLEGAL_VALUE;

    PEP_STATUS status = PEP_STATUS_OK;

    pEp_identity* cached_ident = session->cached_mistrusted;

    if (!cached_ident)

        status = PEP_CANNOT_FIND_IDENTITY;

    else {

        status = set_identity(session, cached_ident);            

        free_identity(session->cached_mistrusted);

    }

    session->cached_mistrusted = NULL;

    return status;

}

DYNAMIC_API PEP_STATUS key_reset_trust(

        PEP_SESSION session,

        pEp_identity *ident

    )

{

    PEP_STATUS status = PEP_STATUS_OK;

    assert(session);

    assert(ident);

    assert(!_identity_me(ident));

    assert(!EMPTYSTR(ident->fpr));

    assert(!EMPTYSTR(ident->address));

    assert(!EMPTYSTR(ident->user_id));

    if (!(session && ident && !_identity_me(ident) && ident->fpr && ident->address &&

            ident->user_id))

        return PEP_ILLEGAL_VALUE;

    status = update_identity(session, ident);

    if (status != PEP_STATUS_OK)

        return status;

    if (ident->comm_type == PEP_ct_mistrusted)

        ident->comm_type = PEP_ct_unknown;

    else

        ident->comm_type &= ~PEP_ct_confirmed;

    status = set_identity(session, ident);

    if (status != PEP_STATUS_OK)

        return status;

    if (ident->comm_type == PEP_ct_unknown)

        status = update_identity(session, ident);

    return status;

}

DYNAMIC_API PEP_STATUS trust_personal_key(

        PEP_SESSION session,

        pEp_identity *ident

    )

{

    PEP_STATUS status = PEP_STATUS_OK;

    assert(session);

    assert(ident);

    assert(!EMPTYSTR(ident->address));

    assert(!EMPTYSTR(ident->user_id));

    assert(!EMPTYSTR(ident->fpr));

    if (!ident || EMPTYSTR(ident->address) || EMPTYSTR(ident->user_id) ||

            EMPTYSTR(ident->fpr))

        return PEP_ILLEGAL_VALUE;

    status = update_identity(session, ident);

    if (status != PEP_STATUS_OK)

        return status;

    if (ident->comm_type > PEP_ct_strong_but_unconfirmed) {

        ident->comm_type |= PEP_ct_confirmed;

        status = set_identity(session, ident);

    }

    else {

        // MISSING: S/MIME has to be handled depending on trusted CAs

        status = PEP_CANNOT_SET_TRUST;

    }

    return status;

}

DYNAMIC_API PEP_STATUS own_key_is_listed(

        PEP_SESSION session,

        const char *fpr,

        bool *listed

    )

{

    PEP_STATUS status = PEP_STATUS_OK;

    int count;

    assert(session && fpr && fpr[0] && listed);

    if (!(session && fpr && fpr[0] && listed))

        return PEP_ILLEGAL_VALUE;

    *listed = false;

    sqlite3_reset(session->own_key_is_listed);

    sqlite3_bind_text(session->own_key_is_listed, 1, fpr, -1, SQLITE_STATIC);

    int result;

    result = sqlite3_step(session->own_key_is_listed);

    switch (result) {

        case SQLITE_ROW:

            count = sqlite3_column_int(session->own_key_is_listed, 0);

            *listed = count > 0;

            status = PEP_STATUS_OK;

            break;

        default:

            status = PEP_UNKNOWN_ERROR;

    }

    sqlite3_reset(session->own_key_is_listed);

    return status;

}

PEP_STATUS _own_identities_retrieve(

        PEP_SESSION session,

        identity_list **own_identities,

        identity_flags_t excluded_flags

      )

{

    PEP_STATUS status = PEP_STATUS_OK;

    assert(session && own_identities);

    if (!(session && own_identities))

        return PEP_ILLEGAL_VALUE;

    *own_identities = NULL;

    identity_list *_own_identities = new_identity_list(NULL);

    if (_own_identities == NULL)

        goto enomem;

    sqlite3_reset(session->own_identities_retrieve);

    int result;

    // address, fpr, username, user_id, comm_type, lang, flags

    const char *address = NULL;

    const char *fpr = NULL;

    const char *username = NULL;

    const char *user_id = NULL;

    PEP_comm_type comm_type = PEP_ct_unknown;

    const char *lang = NULL;

    unsigned int flags = 0;

    identity_list *_bl = _own_identities;

    do {

        sqlite3_bind_int(session->own_identities_retrieve, 1, excluded_flags);

        result = sqlite3_step(session->own_identities_retrieve);

        switch (result) {

            case SQLITE_ROW:

                address = (const char *)

                    sqlite3_column_text(session->own_identities_retrieve, 0);

                fpr = (const char *)

                    sqlite3_column_text(session->own_identities_retrieve, 1);

                user_id = PEP_OWN_USERID;

                username = (const char *)

                    sqlite3_column_text(session->own_identities_retrieve, 2);

                comm_type = PEP_ct_pEp;

                lang = (const char *)

                    sqlite3_column_text(session->own_identities_retrieve, 3);

                flags = (unsigned int)

                    sqlite3_column_int(session->own_identities_retrieve, 4);

                pEp_identity *ident = new_identity(address, fpr, user_id, username);

                if (!ident)

                    goto enomem;

                ident->comm_type = comm_type;

                if (lang && lang[0]) {

                    ident->lang[0] = lang[0];

                    ident->lang[1] = lang[1];

                    ident->lang[2] = 0;

                }

                ident->flags = flags;

                _bl = identity_list_add(_bl, ident);

                if (_bl == NULL) {

                    free_identity(ident);

                    goto enomem;

                }

                break;

            case SQLITE_DONE:

                break;

            default:

                status = PEP_UNKNOWN_ERROR;

                result = SQLITE_DONE;

        }

    } while (result != SQLITE_DONE);

    sqlite3_reset(session->own_identities_retrieve);

    if (status == PEP_STATUS_OK)

        *own_identities = _own_identities;

    else

        free_identity_list(_own_identities);

    goto the_end;

enomem:

    free_identity_list(_own_identities);

    status = PEP_OUT_OF_MEMORY;

the_end:

    return status;

}

DYNAMIC_API PEP_STATUS own_identities_retrieve(

        PEP_SESSION session,

        identity_list **own_identities

      )

{

    return _own_identities_retrieve(session, own_identities, 0);

}

PEP_STATUS _own_keys_retrieve(

        PEP_SESSION session,

        stringlist_t **keylist,

        identity_flags_t excluded_flags

      )

{

    PEP_STATUS status = PEP_STATUS_OK;

    assert(session && keylist);

    if (!(session && keylist))

        return PEP_ILLEGAL_VALUE;

    *keylist = NULL;

    stringlist_t *_keylist = NULL;

    sqlite3_reset(session->own_keys_retrieve);

    int result;

    char *fpr = NULL;

    stringlist_t *_bl = _keylist;

    do {

        sqlite3_bind_int(session->own_keys_retrieve, 1, excluded_flags);

        result = sqlite3_step(session->own_keys_retrieve);

        switch (result) {

            case SQLITE_ROW:

                fpr = strdup((const char *) sqlite3_column_text(session->own_keys_retrieve, 0));

                if(fpr == NULL)

                    goto enomem;