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Diffstat (limited to 'trust/tests/frob-cert.c')
-rw-r--r-- | trust/tests/frob-cert.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/trust/tests/frob-cert.c b/trust/tests/frob-cert.c new file mode 100644 index 0000000..71018bd --- /dev/null +++ b/trust/tests/frob-cert.c @@ -0,0 +1,134 @@ +/* + * Copyright (c) 2012 Red Hat Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above + * copyright notice, this list of conditions and the + * following disclaimer. + * * Redistributions in binary form must reproduce the + * above copyright notice, this list of conditions and + * the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * * The names of contributors to this software may not be + * used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF + * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * Author: Stef Walter <stefw@gnome.org> + */ + +#include "config.h" +#include "compat.h" + +#include <libtasn1.h> + +#include <sys/stat.h> +#include <sys/types.h> + +#include <assert.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "pkix.asn.h" + +#define err_if_fail(ret, msg) \ + do { if ((ret) != ASN1_SUCCESS) { \ + fprintf (stderr, "%s: %s\n", msg, asn1_strerror (ret)); \ + exit (1); \ + } } while (0) + +static ssize_t +tlv_length (const unsigned char *data, + size_t length) +{ + unsigned char cls; + int counter = 0; + int cb, len; + unsigned long tag; + + if (asn1_get_tag_der (data, length, &cls, &cb, &tag) == ASN1_SUCCESS) { + counter += cb; + len = asn1_get_length_der (data + cb, length - cb, &cb); + counter += cb; + if (len >= 0) { + len += counter; + if (length >= len) + return len; + } + } + + return -1; +} + +int +main (int argc, + char *argv[]) +{ + char message[ASN1_MAX_ERROR_DESCRIPTION_SIZE] = { 0, }; + node_asn *definitions = NULL; + node_asn *cert = NULL; + p11_mmap *map; + void *data; + size_t size; + int start, end; + ssize_t len; + int ret; + + if (argc != 4) { + fprintf (stderr, "usage: frob-cert struct field filename\n"); + return 2; + } + + ret = asn1_array2tree (pkix_asn1_tab, &definitions, message); + if (ret != ASN1_SUCCESS) { + fprintf (stderr, "definitions: %s\n", message); + return 1; + } + + ret = asn1_create_element (definitions, argv[1], &cert); + err_if_fail (ret, "Certificate"); + + map = p11_mmap_open (argv[3], &data, &size); + if (map == NULL) { + fprintf (stderr, "couldn't open file: %s\n", argv[3]); + return 1; + } + + ret = asn1_der_decoding (&cert, data, size, message); + err_if_fail (ret, message); + + ret = asn1_der_decoding_startEnd (cert, data, size, argv[2], &start, &end); + err_if_fail (ret, "asn1_der_decoding_startEnd"); + + len = tlv_length ((unsigned char *)data + start, size - start); + assert (len >= 0); + + fprintf (stderr, "%lu %d %d %ld\n", (unsigned long)size, start, end, (long)len); + fwrite ((unsigned char *)data + start, 1, len, stdout); + fflush (stdout); + + p11_mmap_close (map); + + asn1_delete_structure (&cert); + asn1_delete_structure (&definitions); + + return 0; +} |