1 files changed, 11 insertions, 8 deletions
diff --git a/lib/sha1.c b/lib/sha1.c
index da5bc16f3c..a121224855 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -73,7 +73,7 @@ void sha1_starts (sha1_context * ctx)
 	ctx->state[4] = 0xC3D2E1F0;
 }
 
-static void sha1_process (sha1_context * ctx, unsigned char data[64])
+static void sha1_process(sha1_context *ctx, const unsigned char data[64])
 {
 	unsigned long temp, W[16], A, B, C, D, E;
 
@@ -230,7 +230,8 @@ static void sha1_process (sha1_context * ctx, unsigned char data[64])
 /*
  * SHA-1 process buffer
  */
-void sha1_update (sha1_context * ctx, unsigned char *input, int ilen)
+void sha1_update(sha1_context *ctx, const unsigned char *input,
+		 unsigned int ilen)
 {
 	int fill;
 	unsigned long left;
@@ -305,7 +306,8 @@ void sha1_finish (sha1_context * ctx, unsigned char output[20])
 /*
  * Output = SHA-1( input buffer )
  */
-void sha1_csum (unsigned char *input, int ilen, unsigned char output[20])
+void sha1_csum(const unsigned char *input, unsigned int ilen,
+	       unsigned char *output)
 {
 	sha1_context ctx;
 
@@ -318,12 +320,12 @@ void sha1_csum (unsigned char *input, int ilen, unsigned char output[20])
  * Output = SHA-1( input buffer ). Trigger the watchdog every 'chunk_sz'
  * bytes of input processed.
  */
-void sha1_csum_wd (unsigned char *input, int ilen, unsigned char output[20],
-			unsigned int chunk_sz)
+void sha1_csum_wd(const unsigned char *input, unsigned int ilen,
+		  unsigned char *output, unsigned int chunk_sz)
 {
 	sha1_context ctx;
 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
-	unsigned char *end, *curr;
+	const unsigned char *end, *curr;
 	int chunk;
 #endif
 
@@ -350,8 +352,9 @@ void sha1_csum_wd (unsigned char *input, int ilen, unsigned char output[20],
 /*
  * Output = HMAC-SHA-1( input buffer, hmac key )
  */
-void sha1_hmac (unsigned char *key, int keylen,
-		unsigned char *input, int ilen, unsigned char output[20])
+void sha1_hmac(const unsigned char *key, int keylen,
+	       const unsigned char *input, unsigned int ilen,
+	       unsigned char *output)
 {
 	int i;
 	sha1_context ctx;