diff --git a/include/u-boot/sha1.h b/include/u-boot/sha1.h
index ab88134..36c3db1 100644
--- a/include/u-boot/sha1.h
+++ b/include/u-boot/sha1.h
@@ -39,6 +39,8 @@
 #define SHA1_SUM_LEN	20
 #define SHA1_DER_LEN	15
 
+#define SHA1_DEF_CHUNK_SZ 0x10000
+
 extern const uint8_t sha1_der_prefix[];
 
 #if defined(CONFIG_MBEDTLS_LIB_CRYPTO)
@@ -82,16 +84,6 @@
 void sha1_finish( sha1_context *ctx, unsigned char output[20] );
 
 /**
- * \brief	   Output = SHA-1( input buffer )
- *
- * \param input    buffer holding the  data
- * \param ilen	   length of the input data
- * \param output   SHA-1 checksum result
- */
-void sha1_csum(const unsigned char *input, unsigned int ilen,
-		unsigned char *output);
-
-/**
  * \brief	   Output = SHA-1( input buffer ), with watchdog triggering
  *
  * \param input    buffer holding the  data