Constify the MD5 implementation.

2 files changed, 4 insertions, 4 deletions

diff --git a/lib/md5.c b/lib/md5.c
index 7d43a60..f4ac436 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -89,9 +89,9 @@
  * This processes one or more 64-byte data blocks, but does NOT update
  * the bit counters.  There are no alignment requirements.
  */
-static void *body(MD5_CTX *ctx, void *data, unsigned long size)
+static const void *body(MD5_CTX *ctx, const void *data, unsigned long size)
 {
-	unsigned char *ptr;
+	const unsigned char *ptr;
 	MD5_u32plus a, b, c, d;
 	MD5_u32plus saved_a, saved_b, saved_c, saved_d;
 
@@ -207,7 +207,7 @@ void MD5_Init(MD5_CTX *ctx)
 	ctx->hi = 0;
 }
 
-void MD5_Update(MD5_CTX *ctx, void *data, unsigned long size)
+void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size)
 {
 	MD5_u32plus saved_lo;
 	unsigned long used, free;
diff --git a/lib/md5.h b/lib/md5.h
index f1a6857..2da44bf 100644
--- a/lib/md5.h
+++ b/lib/md5.h
@@ -39,7 +39,7 @@ typedef struct {
 } MD5_CTX;
 
 extern void MD5_Init(MD5_CTX *ctx);
-extern void MD5_Update(MD5_CTX *ctx, void *data, unsigned long size);
+extern void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size);
 extern void MD5_Final(unsigned char *result, MD5_CTX *ctx);
 
 #endif