1 files changed, 134 insertions, 0 deletions
diff --git a/trust/frob-cert.c b/trust/frob-cert.c
new file mode 100644
index 0000000..c1bc45c
--- /dev/null
+++ b/trust/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], NULL, &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;
+}