add instance file attribute with md5 hash checks

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/md5.h b/md5.h
new file mode 100644
index 0000000..2b9081e
--- /dev/null
+++ b/md5.h
@@ -0,0 +1,21 @@
+#ifndef __PROCD_MD5_H
+#define __PROCD_MD5_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+typedef struct md5_ctx {
+	uint32_t A;
+	uint32_t B;
+	uint32_t C;
+	uint32_t D;
+	uint64_t total;
+	uint32_t buflen;
+	char buffer[128];
+} md5_ctx_t;
+
+void md5_begin(md5_ctx_t *ctx);
+void md5_hash(const void *data, size_t length, md5_ctx_t *ctx);
+void md5_end(void *resbuf, md5_ctx_t *ctx);
+
+#endif