Fix CID 1434549: Unchecked return value in test/evp_test.c

5. check_return: Calling EVP_EncodeUpdate without checking return value
(as is done elsewhere 4 out of 5 times).

Fix CID 1371695, 1371698: Resource leak in test/evp_test.c

- leaked_storage: Variable edata going out of scope leaks the storage it
points to.

- leaked_storage: Variable encode_ctx going out of scope leaks the
storage it points to

Fix CID 1430437, 1430426, 1430429 : Dereference before null check in test/drbg_cavs_test.c

check_after_deref: Null-checking drbg suggests that it
may be null, but it has already been dereferenced on all paths leading
to the check

Fix CID 1440765: Dereference before null check in test/ssltestlib.c

check_after_deref: Null-checking ctx suggests that it may be null, but
it has already been dereferenced on all paths leading to the check.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/7993)

1 files changed, 4 insertions, 2 deletions

diff --git a/test/ssltestlib.c b/test/ssltestlib.c
index 8187513..78c0e8e 100644
--- a/test/ssltestlib.c
+++ b/test/ssltestlib.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -436,7 +436,7 @@ int mempacket_test_inject(BIO *bio, const char *in, int inl, int pktnum,
 {
     MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
     MEMPACKET *thispkt = NULL, *looppkt, *nextpkt, *allpkts[3];
-    int i, duprec = ctx->duprec > 0;
+    int i, duprec;
     const unsigned char *inu = (const unsigned char *)in;
     size_t len = ((inu[RECORD_LEN_HI] << 8) | inu[RECORD_LEN_LO])
                  + DTLS1_RT_HEADER_LENGTH;
@@ -449,6 +449,8 @@ int mempacket_test_inject(BIO *bio, const char *in, int inl, int pktnum,
 
     if ((size_t)inl == len)
         duprec = 0;
+    else
+        duprec = ctx->duprec > 0;
 
     /* We don't support arbitrary injection when duplicating records */
     if (duprec && pktnum != -1)