--- pgp/src/mdfile.c	2018/04/24 16:38:21	1.1.1.2
+++ pgp/src/mdfile.c	2018/04/24 16:39:56	1.1.1.4
@@ -61,7 +61,7 @@ int MDfile0_len(MD5_CTX *mdContext, FILE
 /* Computes the message digest for a file from current position to EOF.
    Uses the RSA Data Security Inc. MD5 Message Digest Algorithm */
 
-int MDfile0(MD5_CTX *mdContext,FILE *inFile)
+static int MDfile0(MD5_CTX *mdContext,FILE *inFile)
 {	int bytes;
 	unsigned char buffer[1024];
 
@@ -87,14 +87,16 @@ int MDfile(MD5_CTX *mdContext,char *file
 	return(0);
 }
 
-/* Finish the MD5 calculation with an extra buffer implicitly appended 
- * to the data.
+/* Add a buffer's worth of data to the MD5 computation.  If a digest
+ * pointer is supplied, complete the computation and write the digest.
  */
-void MD_addbuffer (MD5_CTX *mdContext, byte *buf, int buflen, boolean finish)
+void MD_addbuffer (MD5_CTX *mdContext, byte *buf, int buflen, byte digest[16])
 {
 	MD5Update(mdContext,buf,buflen);
-	if (finish)
-		MD5Final(mdContext);
+	if (digest) {
+		MD5Final(digest, mdContext);
+		burn(*mdContext);	/* Paranoia */
+	}
 }
 
 /* End MD5 routines */