Fix segfault when sptps_test cannot open the key files.

diff --git a/src/sptps_test.c b/src/sptps_test.c
index 95bfda8..38c2c08 100644 (file)
--- a/src/sptps_test.c
+++ b/src/sptps_test.c
@@ -271,11 +271,19 @@ int main(int argc, char *argv[]) {
        crypto_init();
 
        FILE *fp = fopen(argv[1], "r");
+       if(!fp) {
+               fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
+               return 1;
+       }
        if(!(mykey = ecdsa_read_pem_private_key(fp)))
                return 1;
        fclose(fp);
 
        fp = fopen(argv[2], "r");
+       if(!fp) {
+               fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
+               return 1;
+       }
        if(!(hiskey = ecdsa_read_pem_public_key(fp)))
                return 1;
        fclose(fp);