1 files changed, 23 insertions, 0 deletions
diff --git a/src/challenge.h b/src/challenge.h
new file mode 100644
index 0000000..4863782
--- /dev/null
+++ b/src/challenge.h
@@ -0,0 +1,23 @@
+#ifndef CHALLENGE_H
+#define CHALLENGE_H 1
+
+#include <stdint.h>
+
+/** challenge_t: This structure contains the pseudo-random challenge used for
+ * authentication.
+ */
+typedef struct challenge_t {
+	/** tv_sec as returned by gettimeofday */
+	uint32_t sec;
+	/** tv_usec as returned by gettimeofday + random value */
+	uint32_t usec_rnd;
+	/** random values */
+	uint32_t random[6];
+} __attribute__ ((packed)) challenge_t;
+
+
+challenge_t* generate_challenge(void);
+void generate_response(challenge_t *challenge);
+int validate_challenge(challenge_t *local, challenge_t *remote);
+
+#endif