rsa_test: add return value check

Fixes #13361

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13362)

(cherry picked from commit 93c87f745d5694b829d5b52d371d478b063a1fba)

1 files changed, 13 insertions, 11 deletions

diff --git a/test/rsa_test.c b/test/rsa_test.c
index 3820785edc..98d5db8bee 100644
--- a/test/rsa_test.c
+++ b/test/rsa_test.c
@@ -223,18 +223,20 @@ static int pad_unknown(void)
 static int rsa_setkey(RSA** key, unsigned char* ctext, int idx)
 {
     int clen = 0;
+
     *key = RSA_new();
-    switch (idx) {
-    case 0:
-        clen = key1(*key, ctext);
-        break;
-    case 1:
-        clen = key2(*key, ctext);
-        break;
-    case 2:
-        clen = key3(*key, ctext);
-        break;
-    }
+    if (*key != NULL)
+        switch (idx) {
+        case 0:
+            clen = key1(*key, ctext);
+            break;
+        case 1:
+            clen = key2(*key, ctext);
+            break;
+        case 2:
+            clen = key3(*key, ctext);
+            break;
+        }
     return clen;
 }