- Renamed include directory to polarssl
diff --git a/include/polarssl/sha4.h b/include/polarssl/sha4.h
new file mode 100644
index 0000000..6c80085
--- /dev/null
+++ b/include/polarssl/sha4.h
@@ -0,0 +1,135 @@
+/**
+ * \file sha4.h
+ */
+#ifndef XYSSL_SHA4_H
+#define XYSSL_SHA4_H
+
+#if defined(_MSC_VER) || defined(__WATCOMC__)
+ #define UL64(x) x##ui64
+ #define int64 __int64
+#else
+ #define UL64(x) x##ULL
+ #define int64 long long
+#endif
+
+/**
+ * \brief SHA-512 context structure
+ */
+typedef struct
+{
+ unsigned int64 total[2]; /*!< number of bytes processed */
+ unsigned int64 state[8]; /*!< intermediate digest state */
+ unsigned char buffer[128]; /*!< data block being processed */
+
+ unsigned char ipad[128]; /*!< HMAC: inner padding */
+ unsigned char opad[128]; /*!< HMAC: outer padding */
+ int is384; /*!< 0 => SHA-512, else SHA-384 */
+}
+sha4_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief SHA-512 context setup
+ *
+ * \param ctx context to be initialized
+ * \param is384 0 = use SHA512, 1 = use SHA384
+ */
+void sha4_starts( sha4_context *ctx, int is384 );
+
+/**
+ * \brief SHA-512 process buffer
+ *
+ * \param ctx SHA-512 context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void sha4_update( sha4_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief SHA-512 final digest
+ *
+ * \param ctx SHA-512 context
+ * \param output SHA-384/512 checksum result
+ */
+void sha4_finish( sha4_context *ctx, unsigned char output[64] );
+
+/**
+ * \brief Output = SHA-512( input buffer )
+ *
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output SHA-384/512 checksum result
+ * \param is384 0 = use SHA512, 1 = use SHA384
+ */
+void sha4( unsigned char *input, int ilen,
+ unsigned char output[64], int is384 );
+
+/**
+ * \brief Output = SHA-512( file contents )
+ *
+ * \param path input file name
+ * \param output SHA-384/512 checksum result
+ * \param is384 0 = use SHA512, 1 = use SHA384
+ *
+ * \return 0 if successful, 1 if fopen failed,
+ * or 2 if fread failed
+ */
+int sha4_file( char *path, unsigned char output[64], int is384 );
+
+/**
+ * \brief SHA-512 HMAC context setup
+ *
+ * \param ctx HMAC context to be initialized
+ * \param is384 0 = use SHA512, 1 = use SHA384
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key
+ */
+void sha4_hmac_starts( sha4_context *ctx, unsigned char *key, int keylen,
+ int is384 );
+
+/**
+ * \brief SHA-512 HMAC process buffer
+ *
+ * \param ctx HMAC context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void sha4_hmac_update( sha4_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief SHA-512 HMAC final digest
+ *
+ * \param ctx HMAC context
+ * \param output SHA-384/512 HMAC checksum result
+ */
+void sha4_hmac_finish( sha4_context *ctx, unsigned char output[64] );
+
+/**
+ * \brief Output = HMAC-SHA-512( hmac key, input buffer )
+ *
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output HMAC-SHA-384/512 result
+ * \param is384 0 = use SHA512, 1 = use SHA384
+ */
+void sha4_hmac( unsigned char *key, int keylen,
+ unsigned char *input, int ilen,
+ unsigned char output[64], int is384 );
+
+/**
+ * \brief Checkup routine
+ *
+ * \return 0 if successful, or 1 if the test failed
+ */
+int sha4_self_test( int verbose );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* sha4.h */