diff --git a/ap/lib/libssl/openssl-1.1.1o/test/drbgtest.c b/ap/lib/libssl/openssl-1.1.1o/test/drbgtest.c
new file mode 100644
index 0000000..a9ba5b4
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/test/drbgtest.c
@@ -0,0 +1,1028 @@
+/*
+ * Copyright 2011-2020 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 <string.h>
+#include "internal/nelem.h"
+#include <openssl/crypto.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+#include <openssl/obj_mac.h>
+#include <openssl/evp.h>
+#include <openssl/aes.h>
+#include "../crypto/rand/rand_local.h"
+#include "../include/crypto/rand.h"
+
+#if defined(_WIN32)
+# include <windows.h>
+#endif
+
+
+#if defined(OPENSSL_SYS_UNIX)
+# include <sys/types.h>
+# include <sys/wait.h>
+# include <unistd.h>
+#endif
+
+#include "testutil.h"
+#include "drbgtest.h"
+
+typedef struct drbg_selftest_data_st {
+    int post;
+    int nid;
+    unsigned int flags;
+
+    /* KAT data for no PR */
+    const unsigned char *entropy;
+    size_t entropylen;
+    const unsigned char *nonce;
+    size_t noncelen;
+    const unsigned char *pers;
+    size_t perslen;
+    const unsigned char *adin;
+    size_t adinlen;
+    const unsigned char *entropyreseed;
+    size_t entropyreseedlen;
+    const unsigned char *adinreseed;
+    size_t adinreseedlen;
+    const unsigned char *adin2;
+    size_t adin2len;
+    const unsigned char *expected;
+    size_t exlen;
+    const unsigned char *kat2;
+    size_t kat2len;
+
+    /* KAT data for PR */
+    const unsigned char *entropy_pr;
+    size_t entropylen_pr;
+    const unsigned char *nonce_pr;
+    size_t noncelen_pr;
+    const unsigned char *pers_pr;
+    size_t perslen_pr;
+    const unsigned char *adin_pr;
+    size_t adinlen_pr;
+    const unsigned char *entropypr_pr;
+    size_t entropyprlen_pr;
+    const unsigned char *ading_pr;
+    size_t adinglen_pr;
+    const unsigned char *entropyg_pr;
+    size_t entropyglen_pr;
+    const unsigned char *kat_pr;
+    size_t katlen_pr;
+    const unsigned char *kat2_pr;
+    size_t kat2len_pr;
+} DRBG_SELFTEST_DATA;
+
+#define make_drbg_test_data(nid, flag, pr, post) {\
+    post, nid, flag, \
+    pr##_entropyinput, sizeof(pr##_entropyinput), \
+    pr##_nonce, sizeof(pr##_nonce), \
+    pr##_personalizationstring, sizeof(pr##_personalizationstring), \
+    pr##_additionalinput, sizeof(pr##_additionalinput), \
+    pr##_entropyinputreseed, sizeof(pr##_entropyinputreseed), \
+    pr##_additionalinputreseed, sizeof(pr##_additionalinputreseed), \
+    pr##_additionalinput2, sizeof(pr##_additionalinput2), \
+    pr##_int_returnedbits, sizeof(pr##_int_returnedbits), \
+    pr##_returnedbits, sizeof(pr##_returnedbits), \
+    pr##_pr_entropyinput, sizeof(pr##_pr_entropyinput), \
+    pr##_pr_nonce, sizeof(pr##_pr_nonce), \
+    pr##_pr_personalizationstring, sizeof(pr##_pr_personalizationstring), \
+    pr##_pr_additionalinput, sizeof(pr##_pr_additionalinput), \
+    pr##_pr_entropyinputpr, sizeof(pr##_pr_entropyinputpr), \
+    pr##_pr_additionalinput2, sizeof(pr##_pr_additionalinput2), \
+    pr##_pr_entropyinputpr2, sizeof(pr##_pr_entropyinputpr2), \
+    pr##_pr_int_returnedbits, sizeof(pr##_pr_int_returnedbits), \
+    pr##_pr_returnedbits, sizeof(pr##_pr_returnedbits) \
+    }
+
+#define make_drbg_test_data_use_df(nid, pr, p) \
+    make_drbg_test_data(nid, 0, pr, p)
+
+#define make_drbg_test_data_no_df(nid, pr, p)                      \
+    make_drbg_test_data(nid, RAND_DRBG_FLAG_CTR_NO_DF, pr, p)
+
+static DRBG_SELFTEST_DATA drbg_test[] = {
+    make_drbg_test_data_no_df (NID_aes_128_ctr, aes_128_no_df,  0),
+    make_drbg_test_data_no_df (NID_aes_192_ctr, aes_192_no_df,  0),
+    make_drbg_test_data_no_df (NID_aes_256_ctr, aes_256_no_df,  1),
+    make_drbg_test_data_use_df(NID_aes_128_ctr, aes_128_use_df, 0),
+    make_drbg_test_data_use_df(NID_aes_192_ctr, aes_192_use_df, 0),
+    make_drbg_test_data_use_df(NID_aes_256_ctr, aes_256_use_df, 1),
+};
+
+static int app_data_index;
+
+/*
+ * Test context data, attached as EXDATA to the RAND_DRBG
+ */
+typedef struct test_ctx_st {
+    const unsigned char *entropy;
+    size_t entropylen;
+    int entropycnt;
+    const unsigned char *nonce;
+    size_t noncelen;
+    int noncecnt;
+} TEST_CTX;
+
+static size_t kat_entropy(RAND_DRBG *drbg, unsigned char **pout,
+                          int entropy, size_t min_len, size_t max_len,
+                          int prediction_resistance)
+{
+    TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
+
+    t->entropycnt++;
+    *pout = (unsigned char *)t->entropy;
+    return t->entropylen;
+}
+
+static size_t kat_nonce(RAND_DRBG *drbg, unsigned char **pout,
+                        int entropy, size_t min_len, size_t max_len)
+{
+    TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
+
+    t->noncecnt++;
+    *pout = (unsigned char *)t->nonce;
+    return t->noncelen;
+}
+
+static int uninstantiate(RAND_DRBG *drbg)
+{
+    int ret = drbg == NULL ? 1 : RAND_DRBG_uninstantiate(drbg);
+
+    ERR_clear_error();
+    return ret;
+}
+
+/*
+ * Do a single KAT test.  Return 0 on failure.
+ */
+static int single_kat(DRBG_SELFTEST_DATA *td)
+{
+    RAND_DRBG *drbg = NULL;
+    TEST_CTX t;
+    int failures = 0;
+    unsigned char buff[1024];
+
+    /*
+     * Test without PR: Instantiate DRBG with test entropy, nonce and
+     * personalisation string.
+     */
+    if (!TEST_ptr(drbg = RAND_DRBG_new(td->nid, td->flags, NULL)))
+        return 0;
+    if (!TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
+                                           kat_nonce, NULL))) {
+        failures++;
+        goto err;
+    }
+    memset(&t, 0, sizeof(t));
+    t.entropy = td->entropy;
+    t.entropylen = td->entropylen;
+    t.nonce = td->nonce;
+    t.noncelen = td->noncelen;
+    RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
+
+    if (!TEST_true(RAND_DRBG_instantiate(drbg, td->pers, td->perslen))
+            || !TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
+                                             td->adin, td->adinlen))
+            || !TEST_mem_eq(td->expected, td->exlen, buff, td->exlen))
+        failures++;
+
+    /* Reseed DRBG with test entropy and additional input */
+    t.entropy = td->entropyreseed;
+    t.entropylen = td->entropyreseedlen;
+    if (!TEST_true(RAND_DRBG_reseed(drbg, td->adinreseed, td->adinreseedlen, 0)
+            || !TEST_true(RAND_DRBG_generate(drbg, buff, td->kat2len, 0,
+                                             td->adin2, td->adin2len))
+            || !TEST_mem_eq(td->kat2, td->kat2len, buff, td->kat2len)))
+        failures++;
+    uninstantiate(drbg);
+
+    /*
+     * Now test with PR: Instantiate DRBG with test entropy, nonce and
+     * personalisation string.
+     */
+    if (!TEST_true(RAND_DRBG_set(drbg, td->nid, td->flags))
+            || !TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
+                                                  kat_nonce, NULL)))
+        failures++;
+    RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
+    t.entropy = td->entropy_pr;
+    t.entropylen = td->entropylen_pr;
+    t.nonce = td->nonce_pr;
+    t.noncelen = td->noncelen_pr;
+    t.entropycnt = 0;
+    t.noncecnt = 0;
+    if (!TEST_true(RAND_DRBG_instantiate(drbg, td->pers_pr, td->perslen_pr)))
+        failures++;
+
+    /*
+     * Now generate with PR: we need to supply entropy as this will
+     * perform a reseed operation.
+     */
+    t.entropy = td->entropypr_pr;
+    t.entropylen = td->entropyprlen_pr;
+    if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->katlen_pr, 1,
+                                      td->adin_pr, td->adinlen_pr))
+            || !TEST_mem_eq(td->kat_pr, td->katlen_pr, buff, td->katlen_pr))
+        failures++;
+
+    /*
+     * Now generate again with PR: supply new entropy again.
+     */
+    t.entropy = td->entropyg_pr;
+    t.entropylen = td->entropyglen_pr;
+
+    if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->kat2len_pr, 1,
+                                      td->ading_pr, td->adinglen_pr))
+                || !TEST_mem_eq(td->kat2_pr, td->kat2len_pr,
+                                buff, td->kat2len_pr))
+        failures++;
+
+err:
+    uninstantiate(drbg);
+    RAND_DRBG_free(drbg);
+    return failures == 0;
+}
+
+/*
+ * Initialise a DRBG based on selftest data
+ */
+static int init(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td, TEST_CTX *t)
+{
+    if (!TEST_true(RAND_DRBG_set(drbg, td->nid, td->flags))
+            || !TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
+                                                  kat_nonce, NULL)))
+        return 0;
+    RAND_DRBG_set_ex_data(drbg, app_data_index, t);
+    t->entropy = td->entropy;
+    t->entropylen = td->entropylen;
+    t->nonce = td->nonce;
+    t->noncelen = td->noncelen;
+    t->entropycnt = 0;
+    t->noncecnt = 0;
+    return 1;
+}
+
+/*
+ * Initialise and instantiate DRBG based on selftest data
+ */
+static int instantiate(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td,
+                       TEST_CTX *t)
+{
+    if (!TEST_true(init(drbg, td, t))
+            || !TEST_true(RAND_DRBG_instantiate(drbg, td->pers, td->perslen)))
+        return 0;
+    return 1;
+}
+
+/*
+ * Perform extensive error checking as required by SP800-90.
+ * Induce several failure modes and check an error condition is set.
+ */
+static int error_check(DRBG_SELFTEST_DATA *td)
+{
+    RAND_DRBG *drbg = NULL;
+    TEST_CTX t;
+    unsigned char buff[1024];
+    unsigned int reseed_counter_tmp;
+    int ret = 0;
+
+    if (!TEST_ptr(drbg = RAND_DRBG_new(0, 0, NULL)))
+        goto err;
+
+    /*
+     * Personalisation string tests
+     */
+
+    /* Test detection of too large personalisation string */
+    if (!init(drbg, td, &t)
+            || !TEST_false(RAND_DRBG_instantiate(drbg, td->pers, drbg->max_perslen + 1)))
+        goto err;
+
+    /*
+     * Entropy source tests
+     */
+
+    /* Test entropy source failure detection: i.e. returns no data */
+    t.entropylen = 0;
+    if (!TEST_false(RAND_DRBG_instantiate(drbg, td->pers, td->perslen)))
+        goto err;
+
+    /* Try to generate output from uninstantiated DRBG */
+    if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
+                                       td->adin, td->adinlen))
+            || !uninstantiate(drbg))
+        goto err;
+
+    /* Test insufficient entropy */
+    if (!init(drbg, td, &t))
+        goto err;
+    t.entropylen = drbg->min_entropylen - 1;
+    if (!TEST_false(RAND_DRBG_instantiate(drbg, td->pers, td->perslen))
+            || !uninstantiate(drbg))
+        goto err;
+
+    /* Test too much entropy */
+    if (!init(drbg, td, &t))
+        goto err;
+    t.entropylen = drbg->max_entropylen + 1;
+    if (!TEST_false(RAND_DRBG_instantiate(drbg, td->pers, td->perslen))
+            || !uninstantiate(drbg))
+        goto err;
+
+    /*
+     * Nonce tests
+     */
+
+    /* Test too small nonce */
+    if (drbg->min_noncelen) {
+        if (!init(drbg, td, &t))
+            goto err;
+        t.noncelen = drbg->min_noncelen - 1;
+        if (!TEST_false(RAND_DRBG_instantiate(drbg, td->pers, td->perslen))
+                || !uninstantiate(drbg))
+            goto err;
+    }
+
+    /* Test too large nonce */
+    if (drbg->max_noncelen) {
+        if (!init(drbg, td, &t))
+            goto err;
+        t.noncelen = drbg->max_noncelen + 1;
+        if (!TEST_false(RAND_DRBG_instantiate(drbg, td->pers, td->perslen))
+                || !uninstantiate(drbg))
+            goto err;
+    }
+
+    /* Instantiate with valid data, Check generation is now OK */
+    if (!instantiate(drbg, td, &t)
+            || !TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
+                                             td->adin, td->adinlen)))
+        goto err;
+
+    /* Request too much data for one request */
+    if (!TEST_false(RAND_DRBG_generate(drbg, buff, drbg->max_request + 1, 0,
+                                       td->adin, td->adinlen)))
+        goto err;
+
+    /* Try too large additional input */
+    if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
+                                       td->adin, drbg->max_adinlen + 1)))
+        goto err;
+
+    /*
+     * Check prediction resistance request fails if entropy source
+     * failure.
+     */
+    t.entropylen = 0;
+    if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 1,
+                                      td->adin, td->adinlen))
+            || !uninstantiate(drbg))
+        goto err;
+
+    /* Instantiate again with valid data */
+    if (!instantiate(drbg, td, &t))
+        goto err;
+    reseed_counter_tmp = drbg->generate_counter;
+    drbg->generate_counter = drbg->reseed_interval;
+
+    /* Generate output and check entropy has been requested for reseed */
+    t.entropycnt = 0;
+    if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
+                                      td->adin, td->adinlen))
+            || !TEST_int_eq(t.entropycnt, 1)
+            || !TEST_int_eq(drbg->generate_counter, reseed_counter_tmp + 1)
+            || !uninstantiate(drbg))
+        goto err;
+
+    /*
+     * Check prediction resistance request fails if entropy source
+     * failure.
+     */
+    t.entropylen = 0;
+    if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 1,
+                                       td->adin, td->adinlen))
+            || !uninstantiate(drbg))
+        goto err;
+
+    /* Test reseed counter works */
+    if (!instantiate(drbg, td, &t))
+        goto err;
+    reseed_counter_tmp = drbg->generate_counter;
+    drbg->generate_counter = drbg->reseed_interval;
+
+    /* Generate output and check entropy has been requested for reseed */
+    t.entropycnt = 0;
+    if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
+                                      td->adin, td->adinlen))
+            || !TEST_int_eq(t.entropycnt, 1)
+            || !TEST_int_eq(drbg->generate_counter, reseed_counter_tmp + 1)
+            || !uninstantiate(drbg))
+        goto err;
+
+    /*
+     * Explicit reseed tests
+     */
+
+    /* Test explicit reseed with too large additional input */
+    if (!instantiate(drbg, td, &t)
+            || !TEST_false(RAND_DRBG_reseed(drbg, td->adin, drbg->max_adinlen + 1, 0)))
+        goto err;
+
+    /* Test explicit reseed with entropy source failure */
+    t.entropylen = 0;
+    if (!TEST_false(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0))
+            || !uninstantiate(drbg))
+        goto err;
+
+    /* Test explicit reseed with too much entropy */
+    if (!instantiate(drbg, td, &t))
+        goto err;
+    t.entropylen = drbg->max_entropylen + 1;
+    if (!TEST_false(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0))
+            || !uninstantiate(drbg))
+        goto err;
+
+    /* Test explicit reseed with too little entropy */
+    if (!instantiate(drbg, td, &t))
+        goto err;
+    t.entropylen = drbg->min_entropylen - 1;
+    if (!TEST_false(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0))
+            || !uninstantiate(drbg))
+        goto err;
+
+    ret = 1;
+
+err:
+    uninstantiate(drbg);
+    RAND_DRBG_free(drbg);
+    return ret;
+}
+
+static int test_kats(int i)
+{
+    DRBG_SELFTEST_DATA *td = &drbg_test[i];
+    int rv = 0;
+
+    if (!single_kat(td))
+        goto err;
+    rv = 1;
+
+err:
+    return rv;
+}
+
+static int test_error_checks(int i)
+{
+    DRBG_SELFTEST_DATA *td = &drbg_test[i];
+    int rv = 0;
+
+    if (!error_check(td))
+        goto err;
+    rv = 1;
+
+err:
+    return rv;
+}
+
+/*
+ * Hook context data, attached as EXDATA to the RAND_DRBG
+ */
+typedef struct hook_ctx_st {
+    RAND_DRBG *drbg;
+    /*
+     * Currently, all DRBGs use the same get_entropy() callback.
+     * The tests however, don't assume this and store
+     * the original callback for every DRBG separately.
+     */
+    RAND_DRBG_get_entropy_fn get_entropy;
+    /* forces a failure of the get_entropy() call if nonzero */
+    int fail;
+    /* counts successful reseeds */
+    int reseed_count;
+} HOOK_CTX;
+
+static HOOK_CTX master_ctx, public_ctx, private_ctx;
+
+static HOOK_CTX *get_hook_ctx(RAND_DRBG *drbg)
+{
+    return (HOOK_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
+}
+
+/* Intercepts and counts calls to the get_entropy() callback */
+static size_t get_entropy_hook(RAND_DRBG *drbg, unsigned char **pout,
+                              int entropy, size_t min_len, size_t max_len,
+                              int prediction_resistance)
+{
+    size_t ret;
+    HOOK_CTX *ctx = get_hook_ctx(drbg);
+
+    if (ctx->fail != 0)
+        return 0;
+
+    ret = ctx->get_entropy(drbg, pout, entropy, min_len, max_len,
+                           prediction_resistance);
+
+    if (ret != 0)
+        ctx->reseed_count++;
+    return ret;
+}
+
+/* Installs a hook for the get_entropy() callback of the given drbg */
+static void hook_drbg(RAND_DRBG *drbg, HOOK_CTX *ctx)
+{
+    memset(ctx, 0, sizeof(*ctx));
+    ctx->drbg = drbg;
+    ctx->get_entropy = drbg->get_entropy;
+    drbg->get_entropy = get_entropy_hook;
+    RAND_DRBG_set_ex_data(drbg, app_data_index, ctx);
+}
+
+/* Installs the hook for the get_entropy() callback of the given drbg */
+static void unhook_drbg(RAND_DRBG *drbg)
+{
+    HOOK_CTX *ctx = get_hook_ctx(drbg);
+
+    drbg->get_entropy = ctx->get_entropy;
+    CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DRBG, drbg, &drbg->ex_data);
+}
+
+/* Resets the given hook context */
+static void reset_hook_ctx(HOOK_CTX *ctx)
+{
+    ctx->fail = 0;
+    ctx->reseed_count = 0;
+}
+
+/* Resets all drbg hook contexts */
+static void reset_drbg_hook_ctx(void)
+{
+    reset_hook_ctx(&master_ctx);
+    reset_hook_ctx(&public_ctx);
+    reset_hook_ctx(&private_ctx);
+}
+
+/*
+ * Generates random output using RAND_bytes() and RAND_priv_bytes()
+ * and checks whether the three shared DRBGs were reseeded as
+ * expected.
+ *
+ * |expect_success|: expected outcome (as reported by RAND_status())
+ * |master|, |public|, |private|: pointers to the three shared DRBGs
+ * |expect_xxx_reseed| =
+ *       1:  it is expected that the specified DRBG is reseeded
+ *       0:  it is expected that the specified DRBG is not reseeded
+ *      -1:  don't check whether the specified DRBG was reseeded or not
+ * |reseed_time|: if nonzero, used instead of time(NULL) to set the
+ *                |before_reseed| time.
+ */
+static int test_drbg_reseed(int expect_success,
+                            RAND_DRBG *master,
+                            RAND_DRBG *public,
+                            RAND_DRBG *private,
+                            int expect_master_reseed,
+                            int expect_public_reseed,
+                            int expect_private_reseed,
+                            time_t reseed_time
+                           )
+{
+    unsigned char buf[32];
+    time_t before_reseed, after_reseed;
+    int expected_state = (expect_success ? DRBG_READY : DRBG_ERROR);
+
+    /*
+     * step 1: check preconditions
+     */
+
+    /* Test whether seed propagation is enabled */
+    if (!TEST_int_ne(master->reseed_counter, 0)
+        || !TEST_int_ne(public->reseed_counter, 0)
+        || !TEST_int_ne(private->reseed_counter, 0))
+        return 0;
+
+    /* Check whether the master DRBG's reseed counter is the largest one */
+    if (!TEST_int_le(public->reseed_counter, master->reseed_counter)
+        || !TEST_int_le(private->reseed_counter, master->reseed_counter))
+        return 0;
+
+    /*
+     * step 2: generate random output
+     */
+
+    if (reseed_time == 0)
+        reseed_time = time(NULL);
+
+    /* Generate random output from the public and private DRBG */
+    before_reseed = expect_master_reseed == 1 ? reseed_time : 0;
+    if (!TEST_int_eq(RAND_bytes(buf, sizeof(buf)), expect_success)
+        || !TEST_int_eq(RAND_priv_bytes(buf, sizeof(buf)), expect_success))
+        return 0;
+    after_reseed = time(NULL);
+
+
+    /*
+     * step 3: check postconditions
+     */
+
+    /* Test whether reseeding succeeded as expected */
+    if (!TEST_int_eq(master->state, expected_state)
+        || !TEST_int_eq(public->state, expected_state)
+        || !TEST_int_eq(private->state, expected_state))
+        return 0;
+
+    if (expect_master_reseed >= 0) {
+        /* Test whether master DRBG was reseeded as expected */
+        if (!TEST_int_eq(master_ctx.reseed_count, expect_master_reseed))
+            return 0;
+    }
+
+    if (expect_public_reseed >= 0) {
+        /* Test whether public DRBG was reseeded as expected */
+        if (!TEST_int_eq(public_ctx.reseed_count, expect_public_reseed))
+            return 0;
+    }
+
+    if (expect_private_reseed >= 0) {
+        /* Test whether public DRBG was reseeded as expected */
+        if (!TEST_int_eq(private_ctx.reseed_count, expect_private_reseed))
+            return 0;
+    }
+
+    if (expect_success == 1) {
+        /* Test whether all three reseed counters are synchronized */
+        if (!TEST_int_eq(public->reseed_counter, master->reseed_counter)
+            || !TEST_int_eq(private->reseed_counter, master->reseed_counter))
+            return 0;
+
+        /* Test whether reseed time of master DRBG is set correctly */
+        if (!TEST_time_t_le(before_reseed, master->reseed_time)
+            || !TEST_time_t_le(master->reseed_time, after_reseed))
+            return 0;
+
+        /* Test whether reseed times of child DRBGs are synchronized with master */
+        if (!TEST_time_t_ge(public->reseed_time, master->reseed_time)
+            || !TEST_time_t_ge(private->reseed_time, master->reseed_time))
+            return 0;
+    } else {
+        ERR_clear_error();
+    }
+
+    return 1;
+}
+
+
+#if defined(OPENSSL_SYS_UNIX)
+/*
+ * Test whether master, public and private DRBG are reseeded after
+ * forking the process.
+ */
+static int test_drbg_reseed_after_fork(RAND_DRBG *master,
+                                       RAND_DRBG *public,
+                                       RAND_DRBG *private)
+{
+    pid_t pid;
+    int status=0;
+
+    pid = fork();
+    if (!TEST_int_ge(pid, 0))
+        return 0;
+
+    if (pid > 0) {
+        /* I'm the parent; wait for the child and check its exit code */
+        return TEST_int_eq(waitpid(pid, &status, 0), pid) && TEST_int_eq(status, 0);
+    }
+
+    /* I'm the child; check whether all three DRBGs reseed. */
+    if (!TEST_true(test_drbg_reseed(1, master, public, private, 1, 1, 1, 0)))
+        status = 1;
+
+    /* Remove hooks  */
+    unhook_drbg(master);
+    unhook_drbg(public);
+    unhook_drbg(private);
+    exit(status);
+}
+#endif
+
+/*
+ * Test whether the default rand_method (RAND_OpenSSL()) is
+ * setup correctly, in particular whether reseeding  works
+ * as designed.
+ */
+static int test_rand_drbg_reseed(void)
+{
+    RAND_DRBG *master, *public, *private;
+    unsigned char rand_add_buf[256];
+    int rv=0;
+    time_t before_reseed;
+
+    /* Check whether RAND_OpenSSL() is the default method */
+    if (!TEST_ptr_eq(RAND_get_rand_method(), RAND_OpenSSL()))
+        return 0;
+
+    /* All three DRBGs should be non-null */
+    if (!TEST_ptr(master = RAND_DRBG_get0_master())
+        || !TEST_ptr(public = RAND_DRBG_get0_public())
+        || !TEST_ptr(private = RAND_DRBG_get0_private()))
+        return 0;
+
+    /* There should be three distinct DRBGs, two of them chained to master */
+    if (!TEST_ptr_ne(public, private)
+        || !TEST_ptr_ne(public, master)
+        || !TEST_ptr_ne(private, master)
+        || !TEST_ptr_eq(public->parent, master)
+        || !TEST_ptr_eq(private->parent, master))
+        return 0;
+
+    /* uninstantiate the three global DRBGs */
+    RAND_DRBG_uninstantiate(private);
+    RAND_DRBG_uninstantiate(public);
+    RAND_DRBG_uninstantiate(master);
+
+
+    /* Install hooks for the following tests */
+    hook_drbg(master,  &master_ctx);
+    hook_drbg(public,  &public_ctx);
+    hook_drbg(private, &private_ctx);
+
+
+    /*
+     * Test initial seeding of shared DRBGs
+     */
+    if (!TEST_true(test_drbg_reseed(1, master, public, private, 1, 1, 1, 0)))
+        goto error;
+    reset_drbg_hook_ctx();
+
+
+    /*
+     * Test initial state of shared DRBGs
+     */
+    if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 0, 0, 0)))
+        goto error;
+    reset_drbg_hook_ctx();
+
+    /*
+     * Test whether the public and private DRBG are both reseeded when their
+     * reseed counters differ from the master's reseed counter.
+     */
+    master->reseed_counter++;
+    if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 1, 0)))
+        goto error;
+    reset_drbg_hook_ctx();
+
+    /*
+     * Test whether the public DRBG is reseeded when its reseed counter differs
+     * from the master's reseed counter.
+     */
+    master->reseed_counter++;
+    private->reseed_counter++;
+    if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 0, 0)))
+        goto error;
+    reset_drbg_hook_ctx();
+
+    /*
+     * Test whether the private DRBG is reseeded when its reseed counter differs
+     * from the master's reseed counter.
+     */
+    master->reseed_counter++;
+    public->reseed_counter++;
+    if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 0, 1, 0)))
+        goto error;
+    reset_drbg_hook_ctx();
+
+#if defined(OPENSSL_SYS_UNIX)
+    if (!TEST_true(test_drbg_reseed_after_fork(master, public, private)))
+        goto error;
+#endif
+
+    /* fill 'randomness' buffer with some arbitrary data */
+    memset(rand_add_buf, 'r', sizeof(rand_add_buf));
+
+    /*
+     * Test whether all three DRBGs are reseeded by RAND_add().
+     * The before_reseed time has to be measured here and passed into the
+     * test_drbg_reseed() test, because the master DRBG gets already reseeded
+     * in RAND_add(), whence the check for the condition
+     * before_reseed <= master->reseed_time will fail if the time value happens
+     * to increase between the RAND_add() and the test_drbg_reseed() call.
+     */
+    before_reseed = time(NULL);
+    RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf));
+    if (!TEST_true(test_drbg_reseed(1, master, public, private, 1, 1, 1,
+                                    before_reseed)))
+        goto error;
+    reset_drbg_hook_ctx();
+
+
+    /*
+     * Test whether none of the DRBGs is reseed if the master fails to reseed
+     */
+    master_ctx.fail = 1;
+    master->reseed_counter++;
+    RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf));
+    if (!TEST_true(test_drbg_reseed(0, master, public, private, 0, 0, 0, 0)))
+        goto error;
+    reset_drbg_hook_ctx();
+
+    rv = 1;
+
+error:
+    /* Remove hooks  */
+    unhook_drbg(master);
+    unhook_drbg(public);
+    unhook_drbg(private);
+
+    return rv;
+}
+
+#if defined(OPENSSL_THREADS)
+static int multi_thread_rand_bytes_succeeded = 1;
+static int multi_thread_rand_priv_bytes_succeeded = 1;
+
+static void run_multi_thread_test(void)
+{
+    unsigned char buf[256];
+    time_t start = time(NULL);
+    RAND_DRBG *public = NULL, *private = NULL;
+
+    if (!TEST_ptr(public = RAND_DRBG_get0_public())
+            || !TEST_ptr(private = RAND_DRBG_get0_private())) {
+        multi_thread_rand_bytes_succeeded = 0;
+        return;
+    }
+    RAND_DRBG_set_reseed_time_interval(private, 1);
+    RAND_DRBG_set_reseed_time_interval(public, 1);
+
+    do {
+        if (RAND_bytes(buf, sizeof(buf)) <= 0)
+            multi_thread_rand_bytes_succeeded = 0;
+        if (RAND_priv_bytes(buf, sizeof(buf)) <= 0)
+            multi_thread_rand_priv_bytes_succeeded = 0;
+    }
+    while(time(NULL) - start < 5);
+}
+
+# if defined(OPENSSL_SYS_WINDOWS)
+
+typedef HANDLE thread_t;
+
+static DWORD WINAPI thread_run(LPVOID arg)
+{
+    run_multi_thread_test();
+    /*
+     * Because we're linking with a static library, we must stop each
+     * thread explicitly, or so says OPENSSL_thread_stop(3)
+     */
+    OPENSSL_thread_stop();
+    return 0;
+}
+
+static int run_thread(thread_t *t)
+{
+    *t = CreateThread(NULL, 0, thread_run, NULL, 0, NULL);
+    return *t != NULL;
+}
+
+static int wait_for_thread(thread_t thread)
+{
+    return WaitForSingleObject(thread, INFINITE) == 0;
+}
+
+# else
+
+typedef pthread_t thread_t;
+
+static void *thread_run(void *arg)
+{
+    run_multi_thread_test();
+    /*
+     * Because we're linking with a static library, we must stop each
+     * thread explicitly, or so says OPENSSL_thread_stop(3)
+     */
+    OPENSSL_thread_stop();
+    return NULL;
+}
+
+static int run_thread(thread_t *t)
+{
+    return pthread_create(t, NULL, thread_run, NULL) == 0;
+}
+
+static int wait_for_thread(thread_t thread)
+{
+    return pthread_join(thread, NULL) == 0;
+}
+
+# endif
+
+/*
+ * The main thread will also run the test, so we'll have THREADS+1 parallel
+ * tests running
+ */
+# define THREADS 3
+
+static int test_multi_thread(void)
+{
+    thread_t t[THREADS];
+    int i;
+
+    for (i = 0; i < THREADS; i++)
+        run_thread(&t[i]);
+    run_multi_thread_test();
+    for (i = 0; i < THREADS; i++)
+        wait_for_thread(t[i]);
+
+    if (!TEST_true(multi_thread_rand_bytes_succeeded))
+        return 0;
+    if (!TEST_true(multi_thread_rand_priv_bytes_succeeded))
+        return 0;
+
+    return 1;
+}
+#endif
+
+/*
+ * Test that instantiation with RAND_seed() works as expected
+ *
+ * If no os entropy source is available then RAND_seed(buffer, bufsize)
+ * is expected to succeed if and only if the buffer length is at least
+ * rand_drbg_seedlen(master) bytes.
+ *
+ * If an os entropy source is available then RAND_seed(buffer, bufsize)
+ * is expected to succeed always.
+ */
+static int test_rand_seed(void)
+{
+    RAND_DRBG *master = NULL;
+    unsigned char rand_buf[256];
+    size_t rand_buflen;
+    size_t required_seed_buflen = 0;
+
+    if (!TEST_ptr(master = RAND_DRBG_get0_master()))
+        return 0;
+
+#ifdef OPENSSL_RAND_SEED_NONE
+    required_seed_buflen = rand_drbg_seedlen(master);
+#endif
+
+    memset(rand_buf, 0xCD, sizeof(rand_buf));
+
+    for ( rand_buflen = 256 ; rand_buflen > 0 ; --rand_buflen ) {
+        RAND_DRBG_uninstantiate(master);
+        RAND_seed(rand_buf, rand_buflen);
+
+        if (!TEST_int_eq(RAND_status(),
+                         (rand_buflen >= required_seed_buflen)))
+            return 0;
+    }
+
+    return 1;
+}
+
+/*
+ * Test that adding additional data with RAND_add() works as expected
+ * when the master DRBG is instantiated (and below its reseed limit).
+ *
+ * This should succeed regardless of whether an os entropy source is
+ * available or not.
+ */
+static int test_rand_add(void)
+{
+    unsigned char rand_buf[256];
+    size_t rand_buflen;
+
+    memset(rand_buf, 0xCD, sizeof(rand_buf));
+
+    /* make sure it's instantiated */
+    RAND_seed(rand_buf, sizeof(rand_buf));
+    if (!TEST_true(RAND_status()))
+        return 0;
+
+    for ( rand_buflen = 256 ; rand_buflen > 0 ; --rand_buflen ) {
+        RAND_add(rand_buf, rand_buflen, 0.0);
+        if (!TEST_true(RAND_status()))
+            return 0;
+    }
+
+    return 1;
+}
+
+int setup_tests(void)
+{
+    app_data_index = RAND_DRBG_get_ex_new_index(0L, NULL, NULL, NULL, NULL);
+
+    ADD_ALL_TESTS(test_kats, OSSL_NELEM(drbg_test));
+    ADD_ALL_TESTS(test_error_checks, OSSL_NELEM(drbg_test));
+    ADD_TEST(test_rand_drbg_reseed);
+    ADD_TEST(test_rand_seed);
+    ADD_TEST(test_rand_add);
+#if defined(OPENSSL_THREADS)
+    ADD_TEST(test_multi_thread);
+#endif
+    return 1;
+}