Constify arguments.

svn path=/trunk/; revision=16533

2 files changed, 5 insertions, 5 deletions

diff --git a/epan/sha1.c b/epan/sha1.c
index 52e95c132e..f92a3cf432 100644
--- a/epan/sha1.c
+++ b/epan/sha1.c
@@ -57,7 +57,7 @@ void sha1_starts( sha1_context *ctx )
     ctx->state[4] = 0xC3D2E1F0;
 }
 
-static void sha1_process( sha1_context *ctx, guint8 data[64] )
+static void sha1_process( sha1_context *ctx, const guint8 data[64] )
 {
     guint32 temp, W[16], A, B, C, D, E;
 
@@ -213,7 +213,7 @@ static void sha1_process( sha1_context *ctx, guint8 data[64] )
     ctx->state[4] += E;
 }
 
-void sha1_update( sha1_context *ctx, guint8 *input, guint32 length )
+void sha1_update( sha1_context *ctx, const guint8 *input, guint32 length )
 {
     guint32 left, fill;
 
@@ -231,7 +231,7 @@ void sha1_update( sha1_context *ctx, guint8 *input, guint32 length )
     if( left && length >= fill )
     {
         memcpy( (void *) (ctx->buffer + left),
-                (void *) input, fill );
+                (const void *) input, fill );
         sha1_process( ctx, ctx->buffer );
         length -= fill;
         input  += fill;
@@ -248,7 +248,7 @@ void sha1_update( sha1_context *ctx, guint8 *input, guint32 length )
     if( length )
     {
         memcpy( (void *) (ctx->buffer + left),
-                (void *) input, length );
+                (const void *) input, length );
     }
 }
 
diff --git a/epan/sha1.h b/epan/sha1.h
index 4b7e7d4c8b..2f981f7703 100644
--- a/epan/sha1.h
+++ b/epan/sha1.h
@@ -37,7 +37,7 @@ typedef struct
 sha1_context;
 
 void sha1_starts( sha1_context *ctx );
-void sha1_update( sha1_context *ctx, guint8 *input, guint32 length );
+void sha1_update( sha1_context *ctx, const guint8 *input, guint32 length );
 void sha1_finish( sha1_context *ctx, guint8 digest[20] );
 
 #endif /* sha1.h */