Sanitize usage of <ctype.h> functions. It's important that characters

are passed zero-extended, not sign-extended.
PR: 2682

1 files changed, 1 insertions, 1 deletions

diff --git a/apps/ca.c b/apps/ca.c
index de3122b7ec..1cf50e0029 100644
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -2561,7 +2561,7 @@ static int get_certificate_status(const char *serial, CA_DB *db)
 			
 	/* Make it Upper Case */
 	for (i=0; row[DB_serial][i] != '\0'; i++)
-		row[DB_serial][i] = toupper(row[DB_serial][i]);
+		row[DB_serial][i] = toupper((unsigned char)row[DB_serial][i]);
 	
 
 	ok=1;