...but not when it's being used as a digest algorithm...

diff --git a/src/crypto/crypto_null.c b/src/crypto/crypto_null.c
index dda59ea..9a2ea99 100644 (file)
--- a/src/crypto/crypto_null.c
+++ b/src/crypto/crypto_null.c
@@ -37,12 +37,14 @@ static int null_setkey ( void *ctx __unused, void *key __unused,
 
 static void null_encode ( void *ctx __unused, const void *src,
                          void *dst, size_t len ) {
-       memcpy ( dst, src, len );
+       if ( dst )
+               memcpy ( dst, src, len );
 }
 
 static void null_decode ( void *ctx __unused, const void *src,
                          void *dst, size_t len ) {
-       memcpy ( dst, src, len );
+       if ( dst )
+               memcpy ( dst, src, len );
 }
 
 static void null_final ( void *ctx __unused, void *out __unused ) {