Import OpenSSL 1.1.0f

test/secmemtest.c

@@ -0,0 +1,165 @@
+/*
+ * Copyright 2015-2016 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
+ */
+
+#include <stdio.h>
+#include <openssl/crypto.h>
+
+#define perror_line()    perror_line1(__LINE__)
+#define perror_line1(l)  perror_line2(l)
+#define perror_line2(l)  perror("failed " #l)
+
+int main(int argc, char **argv)
+{
+#if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX)
+    char *p = NULL, *q = NULL, *r = NULL, *s = NULL;
+
+    r = OPENSSL_secure_malloc(20);
+    /* r = non-secure 20 */
+    if (r == NULL) {
+        perror_line();
+        return 1;
+    }
+    if (!CRYPTO_secure_malloc_init(4096, 32)) {
+        perror_line();
+        return 1;
+    }
+    if (CRYPTO_secure_allocated(r)) {
+        perror_line();
+        return 1;
+    }
+    p = OPENSSL_secure_malloc(20);
+    /* r = non-secure 20, p = secure 20 */
+    if (!CRYPTO_secure_allocated(p)) {
+        perror_line();
+        return 1;
+    }
+    /* 20 secure -> 32-byte minimum allocaton unit */
+    if (CRYPTO_secure_used() != 32) {
+        perror_line();
+        return 1;
+    }
+    q = OPENSSL_malloc(20);
+    /* r = non-secure 20, p = secure 20, q = non-secure 20 */
+    if (CRYPTO_secure_allocated(q)) {
+        perror_line();
+        return 1;
+    }
+    s = OPENSSL_secure_malloc(20);
+    /* r = non-secure 20, p = secure 20, q = non-secure 20, s = secure 20 */
+    if (!CRYPTO_secure_allocated(s)) {
+        perror_line();
+        return 1;
+    }
+    /* 2 * 20 secure -> 64 bytes allocated */
+    if (CRYPTO_secure_used() != 64) {
+        perror_line();
+        return 1;
+    }
+    OPENSSL_secure_free(p);
+    /* 20 secure -> 32 bytes allocated */
+    if (CRYPTO_secure_used() != 32) {
+        perror_line();
+        return 1;
+    }
+    OPENSSL_free(q);
+    /* should not complete, as secure memory is still allocated */
+    if (CRYPTO_secure_malloc_done()) {
+        perror_line();
+        return 1;
+    }
+    if (!CRYPTO_secure_malloc_initialized()) {
+        perror_line();
+        return 1;
+    }
+    OPENSSL_secure_free(s);
+    /* secure memory should now be 0, so done should complete */
+    if (CRYPTO_secure_used() != 0) {
+        perror_line();
+        return 1;
+    }
+    if (!CRYPTO_secure_malloc_done()) {
+        perror_line();
+        return 1;
+    }
+    if (CRYPTO_secure_malloc_initialized()) {
+        perror_line();
+        return 1;
+    }
+
+    fprintf(stderr, "Possible infinite loop: allocate more than available\n");
+    if (!CRYPTO_secure_malloc_init(32768, 16)) {
+        perror_line();
+        return 1;
+    }
+    if (OPENSSL_secure_malloc((size_t)-1) != NULL) {
+        perror_line();
+        return 1;
+    }
+    if (!CRYPTO_secure_malloc_done()) {
+        perror_line();
+        return 1;
+    }
+
+    /*
+     * If init fails, then initialized should be false, if not, this
+     * could cause an infinite loop secure_malloc, but we don't test it
+     */
+    if (!CRYPTO_secure_malloc_init(16, 16) &&
+        CRYPTO_secure_malloc_initialized()) {
+        CRYPTO_secure_malloc_done();
+        perror_line();
+        return 1;
+    }
+
+    /*-
+     * There was also a possible infinite loop when the number of
+     * elements was 1<<31, as |int i| was set to that, which is a
+     * negative number. However, it requires minimum input values:
+     *
+     * CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4);
+     *
+     * Which really only works on 64-bit systems, since it took 16 GB
+     * secure memory arena to trigger the problem. It naturally takes
+     * corresponding amount of available virtual and physical memory
+     * for test to be feasible/representative. Since we can't assume
+     * that every system is equipped with that much memory, the test
+     * remains disabled. If the reader of this comment really wants
+     * to make sure that infinite loop is fixed, they can enable the
+     * code below.
+     */
+# if 0
+    /*-
+     * On Linux and BSD this test has a chance to complete in minimal
+     * time and with minimum side effects, because mlock is likely to
+     * fail because of RLIMIT_MEMLOCK, which is customarily [much]
+     * smaller than 16GB. In other words Linux and BSD users can be
+     * limited by virtual space alone...
+     */
+    if (sizeof(size_t) > 4) {
+        fprintf(stderr, "Possible infinite loop: 1<<31 limit\n");
+        if (CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4) == 0) {
+            perror_line();
+        } else if (!CRYPTO_secure_malloc_done()) {
+            perror_line();
+            return 1;
+        }
+    }
+# endif
+
+    /* this can complete - it was not really secure */
+    OPENSSL_secure_free(r);
+#else
+    /* Should fail. */
+    if (CRYPTO_secure_malloc_init(4096, 32)) {
+        perror_line();
+        return 1;
+    }
+#endif
+    return 0;
+}