2 files changed, 29 insertions, 0 deletions
diff --git a/util_lib/include/ip_checksum.h b/util_lib/include/ip_checksum.h
new file mode 100644
index 0000000..5559fa4
--- /dev/null
+++ b/util_lib/include/ip_checksum.h
@@ -0,0 +1,8 @@
+#ifndef IP_CHECKSUM_H
+#define IP_CHECKSUM_H
+
+unsigned long compute_ip_checksum(void *addr, unsigned long length);
+unsigned long add_ip_checksums(unsigned long offset, unsigned long sum, unsigned long new);
+unsigned long negate_ip_checksum(unsigned long sum);
+
+#endif /* IP_CHECKSUM_H */
diff --git a/util_lib/include/sha256.h b/util_lib/include/sha256.h
new file mode 100644
index 0000000..b8278a1
--- /dev/null
+++ b/util_lib/include/sha256.h
@@ -0,0 +1,21 @@
+#ifndef SHA256_H
+#define SHA256_H
+
+#include <stdint.h>
+
+typedef struct
+{
+	size_t total[2];
+	uint32_t state[8];
+	uint8_t  buffer[64];
+}
+sha256_context;
+
+typedef uint8_t sha256_digest_t[32];
+
+void sha256_starts( sha256_context *ctx );
+void sha256_update( sha256_context *ctx, const uint8_t *input, size_t length );
+void sha256_finish( sha256_context *ctx, sha256_digest_t digest );
+
+
+#endif /* SHA256_H */