1 files changed, 27 insertions, 0 deletions
diff --git a/src/libstrongswan/chunk.c b/src/libstrongswan/chunk.c
index c9c181f87..40a93e21a 100644
--- a/src/libstrongswan/chunk.c
+++ b/src/libstrongswan/chunk.c
@@ -19,6 +19,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <errno.h>
+#include <ctype.h>
 
 #include "chunk.h"
 
@@ -442,6 +443,32 @@ int chunk_compare(chunk_t a, chunk_t b)
 };
 
 /**
+ * Remove non-printable characters from a chunk.
+ */
+bool chunk_printable(chunk_t chunk, chunk_t *sane, char replace)
+{
+	bool printable = TRUE;
+	int i;
+	
+	if (sane)
+	{
+		*sane = chunk_clone(chunk);
+	}
+	for (i = 0; i < chunk.len; i++)
+	{
+		if (!isprint(chunk.ptr[i]))
+		{
+			if (sane)
+			{
+				sane->ptr[i] = replace;
+			}
+			printable = FALSE;
+		}
+	}
+	return printable;
+}
+
+/**
  * Described in header.
  * 
  * The implementation is based on Paul Hsieh's SuperFastHash: