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diff --git a/lib/openssl/test/d2i_test.c b/lib/openssl/test/d2i_test.c
new file mode 100644
index 0000000..13efba9
--- /dev/null
+++ b/lib/openssl/test/d2i_test.c
@@ -0,0 +1,222 @@
+/*
+ * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/* Regression tests for ASN.1 parsing bugs. */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "testutil.h"
+
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#ifndef OPENSSL_NO_CMS
+# include <openssl/cms.h>
+#endif
+#include "e_os.h"
+
+static const ASN1_ITEM *item_type;
+static const char *test_file;
+
+typedef enum {
+    ASN1_UNKNOWN,
+    ASN1_OK,
+    ASN1_BIO,
+    ASN1_DECODE,
+    ASN1_ENCODE,
+    ASN1_COMPARE
+} expected_error_t;
+
+typedef struct {
+    const char *str;
+    expected_error_t code;
+} error_enum;
+
+static expected_error_t expected_error = ASN1_UNKNOWN;
+
+typedef struct d2i_test_fixture {
+    const char *test_case_name;
+} D2I_TEST_FIXTURE;
+
+static D2I_TEST_FIXTURE set_up(const char *const test_case_name)
+{
+    D2I_TEST_FIXTURE fixture;
+    fixture.test_case_name = test_case_name;
+    return fixture;
+}
+
+static int execute_test(D2I_TEST_FIXTURE fixture)
+{
+    BIO *bio = NULL;
+    ASN1_VALUE *value = NULL;
+    int ret = 0;
+    unsigned char buf[2048];
+    const unsigned char *buf_ptr = buf;
+    unsigned char *der = NULL;
+    int derlen;
+    int len;
+
+    if ((bio = BIO_new_file(test_file, "r")) == NULL)
+        return 0;
+
+    if (expected_error == ASN1_BIO) {
+        value = ASN1_item_d2i_bio(item_type, bio, NULL);
+        if (value == NULL)
+            ret = 1;
+        goto err;
+    }
+
+    /*
+     * Unless we are testing it we don't use ASN1_item_d2i_bio because it
+     * performs sanity checks on the input and can reject it before the
+     * decoder is called.
+     */
+    len = BIO_read(bio, buf, sizeof buf);
+    if (len < 0)
+        goto err;
+
+    value = ASN1_item_d2i(NULL, &buf_ptr, len, item_type);
+    if (value == NULL) {
+        if (expected_error == ASN1_DECODE)
+            ret = 1;
+        goto err;
+    }
+
+    derlen = ASN1_item_i2d(value, &der, item_type);
+
+    if (der == NULL || derlen < 0) {
+        if (expected_error == ASN1_ENCODE)
+            ret = 1;
+        goto err;
+    }
+
+    if (derlen != len || memcmp(der, buf, derlen) != 0) {
+        if (expected_error == ASN1_COMPARE)
+            ret = 1;
+        goto err;
+    }
+
+    if (expected_error == ASN1_OK)
+        ret = 1;
+
+ err:
+    /* Don't indicate success for memory allocation errors */
+    if (ret == 1 && ERR_GET_REASON(ERR_peek_error()) == ERR_R_MALLOC_FAILURE)
+        ret = 0;
+    BIO_free(bio);
+    OPENSSL_free(der);
+    ASN1_item_free(value, item_type);
+    return ret;
+}
+
+static void tear_down(D2I_TEST_FIXTURE fixture)
+{
+    ERR_print_errors_fp(stderr);
+}
+
+#define SETUP_D2I_TEST_FIXTURE() \
+    SETUP_TEST_FIXTURE(D2I_TEST_FIXTURE, set_up)
+
+#define EXECUTE_D2I_TEST() \
+    EXECUTE_TEST(execute_test, tear_down)
+
+static int test_bad_asn1()
+{
+    SETUP_D2I_TEST_FIXTURE();
+    EXECUTE_D2I_TEST();
+}
+
+/*
+ * Usage: d2i_test <type> <file>, e.g.
+ * d2i_test generalname bad_generalname.der
+ */
+int main(int argc, char **argv)
+{
+    int result = 0;
+    const char *test_type_name;
+    const char *expected_error_string;
+    const char *p = getenv("OPENSSL_DEBUG_MEMORY");
+
+    size_t i;
+    static ASN1_ITEM_EXP *items[] = {
+        ASN1_ITEM_ref(ASN1_ANY),
+        ASN1_ITEM_ref(X509),
+        ASN1_ITEM_ref(GENERAL_NAME),
+        ASN1_ITEM_ref(ASN1_INTEGER),
+#ifndef OPENSSL_NO_CMS
+        ASN1_ITEM_ref(CMS_ContentInfo)
+#endif
+    };
+
+    static error_enum expected_errors[] = {
+        {"OK", ASN1_OK},
+        {"BIO", ASN1_BIO},
+        {"decode", ASN1_DECODE},
+        {"encode", ASN1_ENCODE},
+        {"compare", ASN1_COMPARE}
+    };
+
+    if (p != NULL && strcmp(p, "on") == 0)
+        CRYPTO_set_mem_debug(1);
+    CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
+
+    if (argc != 4) {
+        fprintf(stderr,
+                "Usage: d2i_test item_name expected_error file.der\n");
+        return 1;
+    }
+
+    test_type_name = argv[1];
+    expected_error_string = argv[2];
+    test_file = argv[3];
+
+    for (i = 0; i < OSSL_NELEM(items); i++) {
+        const ASN1_ITEM *it = ASN1_ITEM_ptr(items[i]);
+        if (strcmp(test_type_name, it->sname) == 0) {
+            item_type = it;
+            break;
+        }
+    }
+    if (item_type == NULL) {
+        fprintf(stderr, "Unknown type %s\n", test_type_name);
+        fprintf(stderr, "Supported types:\n");
+        for (i = 0; i < OSSL_NELEM(items); i++) {
+            const ASN1_ITEM *it = ASN1_ITEM_ptr(items[i]);
+            fprintf(stderr, "\t%s\n", it->sname);
+        }
+        return 1;
+    }
+
+    for (i = 0; i < OSSL_NELEM(expected_errors); i++) {
+        if (strcmp(expected_errors[i].str, expected_error_string) == 0) {
+            expected_error = expected_errors[i].code;
+            break;
+        }
+    }
+
+    if (expected_error == ASN1_UNKNOWN) {
+        fprintf(stderr, "Unknown expected error %s\n", expected_error_string);
+        return 1;
+    }
+
+    ADD_TEST(test_bad_asn1);
+
+    result = run_tests(argv[0]);
+
+#ifndef OPENSSL_NO_CRYPTO_MDEBUG
+    if (CRYPTO_mem_leaks_fp(stderr) <= 0)
+        result = 1;
+#endif
+
+    return result;
+}