1 files changed, 57 insertions, 0 deletions
diff --git a/src/md5.c b/src/md5.c
new file mode 100644
index 0000000..daa3f6b
--- /dev/null
+++ b/src/md5.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "md5/global.h"
+#include "md5/md5.h"
+
+#include "base64.h"
+#include "md5.h"
+#include "error.h"
+
+#undef MD5_SHOW_ERRORS
+
+
+/* md5_digest_file - Calculate MD5 digest of a file.
+ *
+ * Args:
+ *     path - Path of file to hash.
+ *
+ * Returns:
+ *     string containing the digest on success, "" on failure
+ */
+char *md5_digest_file(const char *path) {
+	unsigned char    c[MD5_DIGEST_LENGTH];
+	FILE            *fp;
+	int              bytes;
+	unsigned char    data[1024 * 64];
+	static char      digest[MD5_DIGEST_LENGTH * 2 + 1];
+	MD5_CTX          context;
+
+	fp = fopen(path, "rb");
+	if (fp == NULL) {
+#ifdef MD5_SHOW_ERRORS
+		error("md5_digest_file: unable to open %s for reading: %s",
+			  path,
+			  strerror(errno));
+#endif /* MD5_SHOW_ERRORS */
+		return NULL;
+	}
+
+	MD5Init(&context);
+	while ((bytes = fread(data, 1, sizeof(data), fp)) != 0)
+		MD5Update(&context, data, bytes);
+	MD5Final(c, &context);
+
+	fclose(fp);
+
+	snprintf(digest, sizeof(digest),
+			 "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
+			 c[0], c[1], c[2], c[3], c[4],
+			 c[5], c[6], c[7], c[8], c[9],
+			 c[10], c[11], c[12], c[13], c[14],
+			 c[15]);
+
+	return digest;
+}