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/* vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80: */
/*
* Copyright 2016 Red Hat, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "jose.h"
#include "../lib/hooks.h"
#include <string.h>
#define SUMMARY "Lists all supported algorithms"
typedef struct {
json_t *kinds;
} jcmd_opt_t;
static const char *prefix = "jose alg [-k KIND]\n\n" SUMMARY;
static const struct {
const char *name;
jose_hook_alg_kind_t kind;
} kinds[] = {
{ "hash", JOSE_HOOK_ALG_KIND_HASH },
{ "sign", JOSE_HOOK_ALG_KIND_SIGN },
{ "wrap", JOSE_HOOK_ALG_KIND_WRAP },
{ "encr", JOSE_HOOK_ALG_KIND_ENCR },
{ "comp", JOSE_HOOK_ALG_KIND_COMP },
{ "exch", JOSE_HOOK_ALG_KIND_EXCH },
{}
};
static jose_hook_alg_kind_t
name2kind(const char *name)
{
for (size_t i = 0; name && kinds[i].name; i++) {
if (strcmp(name, kinds[i].name) == 0)
return kinds[i].kind;
}
return JOSE_HOOK_ALG_KIND_NONE;
}
static bool
opt_set_kind(const jcmd_cfg_t *cfg, void *vopt, const char *arg)
{
json_t **all = vopt;
if (!*all)
*all = json_array();
if (strcmp(arg, "?") == 0) {
for (size_t i = 0; kinds[i].name; i++)
fprintf(stdout, "%s\n", kinds[i].name);
exit(EXIT_SUCCESS);
}
if (name2kind(arg) == JOSE_HOOK_ALG_KIND_NONE)
return false;
return json_array_append_new(*all, json_string(arg)) >= 0;
}
static const jcmd_doc_t doc_kind[] = {
{ .arg = "KIND", .doc = "Restrict algorithm list to a certain kind" },
{ .arg = "?", .doc = "List valid algorithm kinds" },
{}
};
static const jcmd_cfg_t cfgs[] = {
{
.opt = { "kind", required_argument, .val = 'k' },
.off = offsetof(jcmd_opt_t, kinds),
.set = opt_set_kind,
.doc = doc_kind
},
{}
};
static void
jcmd_opt_cleanup(jcmd_opt_t *opt)
{
json_decref(opt->kinds);
}
static int
cmp(const void *a, const void *b)
{
const char *const *aa = a;
const char *const *bb = b;
return strcasecmp(*aa, *bb);
}
static bool
filter(const jcmd_opt_t *opt, jose_hook_alg_kind_t kind)
{
size_t size = 0;
size = json_array_size(opt->kinds);
if (size == 0)
return true;
for (size_t i = 0; i < size; i++) {
if (kind == name2kind(json_string_value(json_array_get(opt->kinds, i))))
return true;
}
return false;
}
static int
jcmd_alg(int argc, char *argv[])
{
jcmd_opt_auto_t opt = {};
size_t len = 0;
if (!jcmd_opt_parse(argc, argv, cfgs, &opt, prefix))
return EXIT_FAILURE;
for (const jose_hook_alg_t *a = jose_hook_alg_list(); a; a = a->next) {
if (filter(&opt, a->kind))
len++;
}
const char *names[len];
for (const jose_hook_alg_t *a = jose_hook_alg_list(); a; a = a->next) {
if (filter(&opt, a->kind))
names[--len] = a->name;
}
qsort(names, sizeof(names) / sizeof(*names), sizeof(*names), cmp);
for (size_t i = 0; i < sizeof(names) / sizeof(*names); i++)
fprintf(stdout, "%s\n", names[i]);
return EXIT_SUCCESS;
}
JCMD_REGISTER(SUMMARY, jcmd_alg, "alg")
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