mirror of
https://github.com/freebsd/freebsd-src
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143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*-
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* Copyright (c) 2018, Juniper Networks, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#define NEED_BRSSL_H
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#include <libsecureboot.h>
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#include <brssl.h>
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#include "decode.h"
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/**
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* @brief decode ascii armor
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*
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* once we get rid of the trailing checksum
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* we can treat as PEM.
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*
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* @sa rfc4880:6.2
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*/
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unsigned char *
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dearmor(char *pem, size_t nbytes, size_t *len)
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{
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#ifdef USE_BEARSSL
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pem_object *po;
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size_t npo;
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#else
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BIO *bp;
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char *name = NULL;
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char *header = NULL;
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#endif
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unsigned char *data = NULL;
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char *cp;
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char *ep;
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/* we need to remove the Armor tail */
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if ((cp = strstr((char *)pem, "\n=")) &&
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(ep = strstr(cp, "\n---"))) {
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memmove(cp, ep, nbytes - (size_t)(ep - pem));
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nbytes -= (size_t)(ep - cp);
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pem[nbytes] = '\0';
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}
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#ifdef USE_BEARSSL
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/* we also need to remove any headers */
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if ((cp = strstr((char *)pem, "---\n")) &&
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(ep = strstr(cp, "\n\n"))) {
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cp += 4;
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ep += 2;
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memmove(cp, ep, nbytes - (size_t)(ep - pem));
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nbytes -= (size_t)(ep - cp);
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pem[nbytes] = '\0';
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}
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if ((po = decode_pem(pem, nbytes, &npo))) {
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data = po->data;
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*len = po->data_len;
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}
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#else
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if ((bp = BIO_new_mem_buf(pem, (int)nbytes))) {
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long llen = (long)nbytes;
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if (!PEM_read_bio(bp, &name, &header, &data, &llen))
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data = NULL;
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BIO_free(bp);
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*len = (size_t)llen;
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}
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#endif
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return (data);
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}
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#ifdef MAIN_DEARMOR
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#include <unistd.h>
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#include <fcntl.h>
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#include <err.h>
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/*
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* Mostly a unit test.
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*/
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int
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main(int argc, char *argv[])
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{
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const char *infile, *outfile;
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unsigned char *data;
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size_t n, x;
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int fd;
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int o;
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infile = outfile = NULL;
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while ((o = getopt(argc, argv, "i:o:")) != -1) {
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switch (o) {
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case 'i':
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infile = optarg;
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break;
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case 'o':
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outfile = optarg;
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break;
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default:
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errx(1, "unknown option: -%c", o);
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}
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}
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if (!infile)
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errx(1, "need -i infile");
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if (outfile) {
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if ((fd = open(outfile, O_WRONLY|O_CREAT|O_TRUNC)) < 0)
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err(1, "cannot open %s", outfile);
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} else {
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fd = 1; /* stdout */
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}
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data = read_file(infile, &n);
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if (!(data[0] & OPENPGP_TAG_ISTAG))
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data = dearmor(data, n, &n);
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for (x = 0; x < n; ) {
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o = write(fd, &data[x], (n - x));
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if (o < 0)
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err(1, "cannot write");
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x += o;
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}
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if (fd != 1)
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close(fd);
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free(data);
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return (0);
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}
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#endif
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