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/**
* @file
* PGP Key Sorting
*
* @authors
* Copyright (C) 2024 Richard Russon <rich@flatcap.org>
*
* @copyright
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 2 of the License, or (at your option) any later
* version.
*
* This program 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @page crypt_sort_pgp PGP Key Sorting
*
* PGP Key Sorting
*/
#include "config.h"
#include <locale.h>
#include <stdbool.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "lib.h"
#include "pgp.h"
#include "pgplib.h"
#include "sort.h"
/**
* pgp_sort_address - Compare two keys by their addresses - Implements ::sort_t - @ingroup sort_api
*/
static int pgp_sort_address(const void *a, const void *b, void *sdata)
{
struct PgpUid const *s = *(struct PgpUid const *const *) a;
struct PgpUid const *t = *(struct PgpUid const *const *) b;
const bool sort_reverse = *(bool *) sdata;
int rc = mutt_istr_cmp(s->addr, t->addr);
if (rc != 0)
goto done;
rc = mutt_istr_cmp(pgp_fpr_or_lkeyid(s->parent), pgp_fpr_or_lkeyid(t->parent));
done:
return sort_reverse ? -rc : rc;
}
/**
* pgp_sort_date - Compare two keys by their dates - Implements ::sort_t - @ingroup sort_api
*/
static int pgp_sort_date(const void *a, const void *b, void *sdata)
{
struct PgpUid const *s = *(struct PgpUid const *const *) a;
struct PgpUid const *t = *(struct PgpUid const *const *) b;
const bool sort_reverse = *(bool *) sdata;
int rc = mutt_numeric_cmp(s->parent->gen_time, t->parent->gen_time);
if (rc != 0)
goto done;
rc = mutt_istr_cmp(s->addr, t->addr);
done:
return sort_reverse ? -rc : rc;
}
/**
* pgp_sort_keyid - Compare two keys by their IDs - Implements ::sort_t - @ingroup sort_api
*/
static int pgp_sort_keyid(const void *a, const void *b, void *sdata)
{
struct PgpUid const *s = *(struct PgpUid const *const *) a;
struct PgpUid const *t = *(struct PgpUid const *const *) b;
const bool sort_reverse = *(bool *) sdata;
int rc = mutt_istr_cmp(pgp_fpr_or_lkeyid(s->parent), pgp_fpr_or_lkeyid(t->parent));
if (rc != 0)
goto done;
rc = mutt_istr_cmp(s->addr, t->addr);
done:
return sort_reverse ? -rc : rc;
}
/**
* pgp_sort_trust - Compare two keys by their trust levels - Implements ::sort_t - @ingroup sort_api
*/
static int pgp_sort_trust(const void *a, const void *b, void *sdata)
{
struct PgpUid const *s = *(struct PgpUid const *const *) a;
struct PgpUid const *t = *(struct PgpUid const *const *) b;
const bool sort_reverse = *(bool *) sdata;
int rc = mutt_numeric_cmp(s->parent->flags & KEYFLAG_RESTRICTIONS,
t->parent->flags & KEYFLAG_RESTRICTIONS);
if (rc != 0)
goto done;
// Note: reversed
rc = mutt_numeric_cmp(t->trust, s->trust);
if (rc != 0)
goto done;
// Note: reversed
rc = mutt_numeric_cmp(t->parent->keylen, s->parent->keylen);
if (rc != 0)
goto done;
// Note: reversed
rc = mutt_numeric_cmp(t->parent->gen_time, s->parent->gen_time);
if (rc != 0)
goto done;
rc = mutt_istr_cmp(s->addr, t->addr);
if (rc != 0)
goto done;
rc = mutt_istr_cmp(pgp_fpr_or_lkeyid(s->parent), pgp_fpr_or_lkeyid(t->parent));
done:
return sort_reverse ? -rc : rc;
}
/**
* pgp_sort_keys - Sort an array of PGP keys
* @param pua Array to sort
*
* Sort PGP keys according to `$pgp_sort_keys`
*/
void pgp_sort_keys(struct PgpUidArray *pua)
{
if (!pua)
return;
sort_t fn = NULL;
short c_pgp_sort_keys = cs_subset_sort(NeoMutt->sub, "pgp_key_sort");
switch (c_pgp_sort_keys & SORT_MASK)
{
case KEY_SORT_ADDRESS:
fn = pgp_sort_address;
break;
case KEY_SORT_DATE:
fn = pgp_sort_date;
break;
case KEY_SORT_KEYID:
fn = pgp_sort_keyid;
break;
case KEY_SORT_TRUST:
default:
fn = pgp_sort_trust;
break;
}
if (ARRAY_SIZE(pua) > 1)
{
bool sort_reverse = c_pgp_sort_keys & SORT_REVERSE;
ARRAY_SORT(pua, fn, &sort_reverse);
}
}
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