Fix several crash causing defects from OpenSSL.

These include:
CVE-2015-0209 - Use After Free following d2i_ECPrivatekey error
CVE-2015-0286 - Segmentation fault in ASN1_TYPE_cmp
CVE-2015-0287 - ASN.1 structure reuse memory corruption
CVE-2015-0289 - PKCS7 NULL pointer dereferences

Several other issues did not apply or were already fixed.
Refer to https://www.openssl.org/news/secadv_20150319.txt

joint work with beck, doug, guenther, jsing, miod

1 files changed, 3 insertions, 3 deletions

diff --git a/src/lib/libcrypto/asn1/a_int.c b/src/lib/libcrypto/asn1/a_int.c
index fe6ce5ee9f..af5d64d056 100644
--- a/src/lib/libcrypto/asn1/a_int.c
+++ b/src/lib/libcrypto/asn1/a_int.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_int.c,v 1.25 2015/02/10 08:33:10 jsing Exp $ */
+/* $OpenBSD: a_int.c,v 1.26 2015/03/19 14:00:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -268,7 +268,7 @@ c2i_ASN1_INTEGER(ASN1_INTEGER **a, const unsigned char **pp, long len)
 
 err:
         ASN1err(ASN1_F_C2I_ASN1_INTEGER, i);
-        if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        if (a == NULL || *a != ret)
                 M_ASN1_INTEGER_free(ret);
         return (NULL);
 }
@@ -335,7 +335,7 @@ d2i_ASN1_UINTEGER(ASN1_INTEGER **a, const unsigned char **pp, long length)
 
 err:
         ASN1err(ASN1_F_D2I_ASN1_UINTEGER, i);
-        if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        if (a == NULL || *a != ret)
                 M_ASN1_INTEGER_free(ret);
         return (NULL);
 }