Initial import

1 files changed, 86 insertions, 0 deletions

diff --git a/cache_from_tree.c b/cache_from_tree.c
new file mode 100644
index 0000000..92a2210
--- /dev/null
+++ b/cache_from_tree.c
@@ -0,0 +1,86 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2022 Cameron Katri.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CAMERON KATRI 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 CAMERON KATRI 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.
+ */
+
+#include <ftw.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "trustcache.h"
+#include "machoparse/cdhash.h"
+
+static struct trust_cache cache = {};
+
+int
+tccallback(const char *path, const struct stat *sb, int typeflag, struct FTW *ftw)
+{
+	if (!S_ISREG(sb->st_mode))
+		return 0;
+
+	struct cdhashes c = {};
+	c.count = 0;
+	find_cdhash(path, sb, &c);
+
+	if (c.count == 0)
+		return 0;
+
+	for (int i = 0; i < c.count; i++) {
+		if (cache.version == 0) {
+			if ((cache.hashes = realloc(cache.hashes, sizeof(trust_cache_hash0) * (cache.num_entries + 1))) == NULL)
+				exit(1);
+			memcpy(cache.hashes[cache.num_entries], c.h[i].cdhash, CS_CDHASH_LEN);
+		} else if (cache.version == 1) {
+			if ((cache.entries = realloc(cache.entries, sizeof(struct trust_cache_entry1) * (cache.num_entries + 1))) == NULL)
+				exit(1);
+			cache.entries[cache.num_entries].hash_type = c.h[i].hash_type;
+			cache.entries[cache.num_entries].flags = 0;
+			memcpy(cache.entries[cache.num_entries].cdhash, c.h[i].cdhash, CS_CDHASH_LEN);
+		}
+		cache.num_entries++;
+	}
+
+	free(c.h);
+
+	return 0;
+}
+
+struct trust_cache
+cache_from_tree(const char *path, uint32_t version)
+{
+	struct trust_cache ret = {};
+	cache.version = version;
+	cache.num_entries = 0;
+	ret.version = version;
+
+	if (nftw(path, tccallback, 20, 0) == -1) {
+		perror("nftw");
+		return ret;
+	}
+
+	ret.num_entries = cache.num_entries;
+	ret.hashes = cache.hashes;
+	return ret;
+}