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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 "jwk.h"
#include <string.h>
#include <unistd.h>
#define SUMMARY "Validates the permissions of a key for the specified use(s)"
typedef struct {
FILE *output;
json_t *keys;
json_t *uses;
bool req;
bool all;
bool set;
} jcmd_opt_t;
static const char *prefix =
"jose jwk use -i JWK [-a] [-r] -u OP [-o JWK [-s]]\n\n" SUMMARY;
static void
jcmd_opt_cleanup(jcmd_opt_t *opt)
{
jcmd_file_cleanup(&opt->output);
json_decrefp(&opt->keys);
json_decrefp(&opt->uses);
}
static bool
opt_set_use(const jcmd_cfg_t *cfg, void *vopt, const char *arg)
{
json_t **uses = vopt;
if (!*uses)
*uses = json_array();
return json_array_append_new(*uses, json_string(arg)) == 0;
}
static const jcmd_doc_t doc_use[] = {
{ .arg = "sign", .doc = "Validate the key for signing" },
{ .arg = "verify", .doc = "Validate the key for verifying" },
{ .arg = "encrypt", .doc = "Validate the key for encrypting" },
{ .arg = "decrypt", .doc = "Validate the key for decrypting" },
{ .arg = "wrapKey", .doc = "Validate the key for wrapping" },
{ .arg = "unwrapKey", .doc = "Validate the key for unwrapping" },
{ .arg = "deriveKey", .doc = "Validate the key for deriving keys" },
{ .arg = "deriveBits", .doc = "Validate the key for deriving bits" },
{}
};
static const jcmd_doc_t doc_all[] = {
{ .doc = "Succeeds only if all operations are allowed" },
{}
};
static const jcmd_doc_t doc_req[] = {
{ .doc = "Operations must be explicitly allowed" },
{}
};
static const jcmd_doc_t doc_output[] = {
{ .arg = "FILE", .doc = "Filter keys to FILE as JWK(Set)" },
{ .arg = "-", .doc = "Filter keys to standard output as JWK(Set)" },
{}
};
static const jcmd_cfg_t cfgs[] = {
{
.opt = { "input", required_argument, .val = 'i' },
.off = offsetof(jcmd_opt_t, keys),
.set = jcmd_opt_set_jwks,
.doc = jcmd_jwk_doc_input,
},
{
.opt = { "use", required_argument, .val = 'u' },
.off = offsetof(jcmd_opt_t, uses),
.set = opt_set_use,
.doc = doc_use,
},
{
.opt = { "all", no_argument, .val = 'a' },
.off = offsetof(jcmd_opt_t, all),
.set = jcmd_opt_set_flag,
.doc = doc_all,
},
{
.opt = { "required", no_argument, .val = 'r' },
.off = offsetof(jcmd_opt_t, req),
.set = jcmd_opt_set_flag,
.doc = doc_req,
},
{
.opt = { "output", required_argument, .val = 'o' },
.off = offsetof(jcmd_opt_t, output),
.set = jcmd_opt_set_ofile,
.doc = doc_output,
},
{
.opt = { "set", no_argument, .val = 's' },
.off = offsetof(jcmd_opt_t, set),
.doc = jcmd_jwk_doc_set,
.set = jcmd_opt_set_flag,
},
{}
};
static int
jcmd_jwk_use(int argc, char *argv[])
{
jcmd_opt_auto_t opt = {};
json_auto_t *arr = NULL;
if (!jcmd_opt_parse(argc, argv, cfgs, &opt, prefix))
return EXIT_FAILURE;
if (json_array_size(opt.uses) == 0) {
fprintf(stderr, "No uses specified!\n");
return EXIT_FAILURE;
}
if (json_array_size(opt.keys) == 0) {
fprintf(stderr, "No JWK specified!\n");
return EXIT_FAILURE;
}
arr = json_array();
if (!arr)
return EXIT_FAILURE;
for (size_t i = 0; i < json_array_size(opt.keys); i++) {
json_t *jwk = json_array_get(opt.keys, i);
bool status = false;
for (size_t j = 0; j < json_array_size(opt.uses); j++) {
const char *use = json_string_value(json_array_get(opt.uses, j));
if (opt.all)
status |= !jose_jwk_prm(NULL, jwk, opt.req, use);
else
status |= jose_jwk_prm(NULL, jwk, opt.req, use);
}
status = opt.all ? !status : status;
if (opt.output) {
if (status && json_array_append(arr, jwk) < 0)
return EXIT_FAILURE;
} else if (!status) {
return EXIT_FAILURE;
}
}
if (opt.output) {
json_auto_t *jwkset = NULL;
switch (json_array_size(arr)) {
case 0: return EXIT_FAILURE;
case 1:
if (!opt.set) {
jwkset = json_incref(json_array_get(arr, 0));
break;
}
/* fallthrough */
default:
jwkset = json_pack("{s:O}", "keys", arr);
break;
}
if (!jwkset)
return EXIT_FAILURE;
if (json_dumpf(jwkset, opt.output, JSON_COMPACT | JSON_SORT_KEYS) < 0)
return EXIT_FAILURE;
if (isatty(fileno(opt.output)))
fprintf(opt.output, "\n");
}
return EXIT_SUCCESS;
}
JCMD_REGISTER(SUMMARY, jcmd_jwk_use, "jwk", "use")
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