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/* vim: set tabstop=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80: */
/*
* Copyright 2017 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 "b64.h"
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#define SUMMARY "Decodes URL-safe Base64 data to binary"
static const char *prefix = "jose b64 dec -i B64 [-O BIN]\n\n" SUMMARY;
static const jcmd_doc_t doc_input[] = {
{ .arg = "FILE", .doc="Read Base64 (URL-safe) data from FILE" },
{ .arg = "-", .doc="Read Base64 (URL-safe) data from standard input" },
{}
};
static const jcmd_doc_t doc_output[] = {
{ .arg = "FILE", .doc="Write binary data to FILE" },
{ .arg = "-", .doc="Write binary data to standard output" },
{}
};
static const jcmd_cfg_t cfgs[] = {
{
.opt = { "base64", required_argument, .val = 'i' },
.off = offsetof(jcmd_b64_opt_t, input),
.set = jcmd_opt_set_ifile,
.doc = doc_input,
},
{
.opt = { "binary", required_argument, .val = 'O' },
.off = offsetof(jcmd_b64_opt_t, output),
.set = jcmd_opt_set_ofile,
.doc = doc_output,
.def = "-",
},
{}
};
static int
jcmd_b64_dec(int argc, char *argv[])
{
jcmd_b64_opt_auto_t opt = {};
jose_io_auto_t *b64 = NULL;
jose_io_auto_t *out = NULL;
if (!jcmd_opt_parse(argc, argv, cfgs, &opt, prefix))
return EXIT_FAILURE;
if (!opt.input) {
fprintf(stderr, "Input not specified!\n");
return EXIT_FAILURE;
}
out = jose_io_file(NULL, opt.output);
if (!out)
return EXIT_FAILURE;
b64 = jose_b64_dec_io(out);
if (!b64)
return EXIT_FAILURE;
for (int c = fgetc(opt.input); c != EOF; c = fgetc(opt.input)) {
uint8_t b = c;
if (isspace(c))
continue;
if (!b64->feed(b64, &b, sizeof(b)))
return EXIT_FAILURE;
}
if (!b64->done(b64))
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
JCMD_REGISTER(SUMMARY, jcmd_b64_dec, "b64", "dec")
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