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-rw-r--r--userspace/setkey.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/userspace/setkey.c b/userspace/setkey.c
index 535773d..d0a2b62 100644
--- a/userspace/setkey.c
+++ b/userspace/setkey.c
@@ -47,6 +47,11 @@ int main(int argc, char** argv)
memset(&key, 0, sizeof(key));
fp = fopen(argv[1], "r");
+ if (fp == NULL) {
+ fprintf(stderr, "Cannot read %s\n", argv[1]);
+ exit(1);
+ }
+
size = fread(key.key, 1, sizeof(key.key), fp);
if (size < 16) {
fprintf(stderr, "Illegal key!\n");