better failure printing, add more checks

1 files changed, 35 insertions, 9 deletions

diff --git a/src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c b/src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c
index 57c55f0496..09b1a34eea 100644
--- a/src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c
+++ b/src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bn_rand_interval.c,v 1.1 2018/11/06 06:55:27 tb Exp $ */
+/*      $OpenBSD: bn_rand_interval.c,v 1.2 2018/11/06 13:17:42 tb Exp $ */
 /*
  * Copyright (c) 2018 Theo Buehler <tb@openbsd.org>
  *
@@ -24,7 +24,28 @@
 
 int bn_rand_interval(BIGNUM *rnd, const BIGNUM *lower_incl,
     const BIGNUM *upper_excl);
+void print_triple(BIGNUM *a, BIGNUM *b, BIGNUM *x);
+
+void
+print_triple(BIGNUM *a, BIGNUM *b, BIGNUM *x) {
+        if (a != NULL) {
+                printf("a = ");
+                BN_print_fp(stdout, a);
+                printf("\n");
+        }
+
+        if (b != NULL) {
+                printf("b = ");
+                BN_print_fp(stdout, b);
+                printf("\n");
+        }
 
+        if (x != NULL) {
+                printf("x = ");
+                BN_print_fp(stdout, x);
+                printf("\n");
+        }
+}
 
 int
 main(int argc, char *argv[])
@@ -45,7 +66,9 @@ main(int argc, char *argv[])
 
                 if (bn_rand_interval(x, a, a) != 0) {
                         success = 0;
+
                         printf("bn_rand_interval(a == a) succeeded\n");
+                        print_triple(a, NULL, x);
                 }
 
                 if (!BN_rand(b, 256, 0, 0))
@@ -67,14 +90,17 @@ main(int argc, char *argv[])
                         err(1, "bn_rand_interval() failed");
 
                 if (BN_cmp(x, a) < 0 || BN_cmp(x, b) >= 0) {
-                        printf("generated number xnot inside [a,b)\n");
-                        printf("a = ");
-                        BN_print_fp(stdout, a);
-                        printf("\nb = ");
-                        BN_print_fp(stdout, b);
-                        printf("\nx = ");
-                        BN_print_fp(stdout, x);
-                        printf("\n");
+                        success = 0;
+
+                        printf("generated number x not inside [a,b)\n");
+                        print_triple(a, b, x);
+                }
+
+                if (bn_rand_interval(x, b, a) != 0) {
+                        success = 0;
+
+                        printf("bn_rand_interval(x, b, a) succeeded\n");
+                        print_triple(a, b, x);
                 }
         }