--- /dev/null
+/*
+ * SHA-512 internal definitions
+ * Copyright (c) 2015, Pali Rohár <pali.rohar@gmail.com>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#ifndef SHA512_I_H
+#define SHA512_I_H
+
+#define SHA512_BLOCK_SIZE 128
+
+struct sha512_state {
+ u64 length, state[8];
+ u32 curlen;
+ u8 buf[SHA512_BLOCK_SIZE];
+};
+
+void sha512_init(struct sha512_state *md);
+int sha512_process(struct sha512_state *md, const unsigned char *in,
+ unsigned long inlen);
+int sha512_done(struct sha512_state *md, unsigned char *out);
+
+#endif /* SHA512_I_H */