/*
- * Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2011-2021 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
* https://www.openssl.org/source/license.html
*/
+/* We need to use some deprecated APIs */
+#define OPENSSL_SUPPRESS_DEPRECATED
+
#include <string.h>
#include "internal/nelem.h"
#include <openssl/crypto.h>
#include <openssl/obj_mac.h>
#include <openssl/evp.h>
#include <openssl/aes.h>
-#include "../crypto/rand/rand_lcl.h"
-#include "../crypto/include/internal/rand_int.h"
+#include "../crypto/rand/rand_local.h"
+#include "../include/crypto/rand.h"
+#include "../include/crypto/evp.h"
+#include "../providers/implementations/rands/drbg_local.h"
+#include "../crypto/evp/evp_local.h"
#if defined(_WIN32)
# include <windows.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)
-
-#define make_drbg_test_data_hash(nid, pr, p) \
- make_drbg_test_data(nid, RAND_DRBG_FLAG_HMAC, hmac_##pr, p), \
- make_drbg_test_data(nid, 0, pr, p)
+#if defined(__TANDEM)
+# if defined(OPENSSL_TANDEM_FLOSS)
+# include <floss.h(floss_fork)>
+# endif
+#endif
-static DRBG_SELFTEST_DATA drbg_test[] = {
-#ifndef FIPS_MODE
- /* FIPS mode doesn't support CTR DRBG without a derivation function */
- 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),
+#if defined(OPENSSL_SYS_UNIX)
+# include <sys/types.h>
+# include <sys/wait.h>
+# include <unistd.h>
#endif
- 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),
- make_drbg_test_data_hash(NID_sha1, sha1, 0),
- make_drbg_test_data_hash(NID_sha224, sha224, 0),
- make_drbg_test_data_hash(NID_sha256, sha256, 1),
- make_drbg_test_data_hash(NID_sha384, sha384, 0),
- make_drbg_test_data_hash(NID_sha512, sha512, 0),
-};
-
-static int app_data_index;
+
+#include "testutil.h"
/*
- * Test context data, attached as EXDATA to the RAND_DRBG
+ * DRBG generate wrappers
*/
-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)
+static int gen_bytes(EVP_RAND_CTX *drbg, unsigned char *buf, int num)
{
- TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
+#ifndef OPENSSL_NO_DEPRECATED_3_0
+ const RAND_METHOD *meth = RAND_get_rand_method();
+
+ if (meth != NULL && meth != RAND_OpenSSL()) {
+ if (meth->bytes != NULL)
+ return meth->bytes(buf, num);
+ return -1;
+ }
+#endif
- t->entropycnt++;
- *pout = (unsigned char *)t->entropy;
- return t->entropylen;
+ if (drbg != NULL)
+ return EVP_RAND_generate(drbg, buf, num, 0, 0, NULL, 0);
+ return 0;
}
-static size_t kat_nonce(RAND_DRBG *drbg, unsigned char **pout,
- int entropy, size_t min_len, size_t max_len)
+static int rand_bytes(unsigned char *buf, int num)
{
- TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
-
- t->noncecnt++;
- *pout = (unsigned char *)t->nonce;
- return t->noncelen;
+ return gen_bytes(RAND_get0_public(NULL), buf, num);
}
- /*
- * Disable CRNG testing if it is enabled.
- * If the DRBG is ready or in an error state, this means an instantiate cycle
- * for which the default personalisation string is used.
- */
-static int disable_crngt(RAND_DRBG *drbg)
+static int rand_priv_bytes(unsigned char *buf, int num)
{
- static const char pers[] = DRBG_DEFAULT_PERS_STRING;
- const int instantiate = drbg->state != DRBG_UNINITIALISED;
-
- if (drbg->get_entropy != rand_crngt_get_entropy)
- return 1;
-
- if ((instantiate && !RAND_DRBG_uninstantiate(drbg))
- || !TEST_true(RAND_DRBG_set_callbacks(drbg, &rand_drbg_get_entropy,
- &rand_drbg_cleanup_entropy,
- &rand_drbg_get_nonce,
- &rand_drbg_cleanup_nonce))
- || (instantiate
- && !RAND_DRBG_instantiate(drbg, (const unsigned char *)pers,
- sizeof(pers) - 1)))
- return 0;
- return 1;
+ return gen_bytes(RAND_get0_private(NULL), buf, num);
}
-static int uninstantiate(RAND_DRBG *drbg)
-{
- int ret = drbg == NULL ? 1 : RAND_DRBG_uninstantiate(drbg);
- ERR_clear_error();
- return ret;
-}
+/* size of random output generated in test_drbg_reseed() */
+#define RANDOM_SIZE 16
/*
- * Do a single KAT test. Return 0 on failure.
+ * DRBG query functions
*/
-static int single_kat(DRBG_SELFTEST_DATA *td)
+static int state(EVP_RAND_CTX *drbg)
{
- RAND_DRBG *drbg = NULL;
- TEST_CTX t;
- int failures = 0;
- unsigned char buff[1024];
+ return EVP_RAND_get_state(drbg);
+}
- /*
- * 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))
- || !TEST_true(disable_crngt(drbg))) {
- failures++;
- goto err;
+static unsigned int query_rand_uint(EVP_RAND_CTX *drbg, const char *name)
+{
+ OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
+ unsigned int n;
+
+ *params = OSSL_PARAM_construct_uint(name, &n);
+ if (EVP_RAND_CTX_get_params(drbg, params))
+ return n;
+ return 0;
+}
+
+#define DRBG_UINT(name) \
+ static unsigned int name(EVP_RAND_CTX *drbg) \
+ { \
+ return query_rand_uint(drbg, #name); \
}
- 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);
+DRBG_UINT(reseed_counter)
- /*
- * 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++;
+static PROV_DRBG *prov_rand(EVP_RAND_CTX *drbg)
+{
+ return (PROV_DRBG *)drbg->algctx;
+}
- /*
- * 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++;
+static void set_reseed_counter(EVP_RAND_CTX *drbg, unsigned int n)
+{
+ PROV_DRBG *p = prov_rand(drbg);
- /*
- * Now generate again with PR: supply new entropy again.
- */
- t.entropy = td->entropyg_pr;
- t.entropylen = td->entropyglen_pr;
+ p->reseed_counter = n;
+}
- 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++;
+static void inc_reseed_counter(EVP_RAND_CTX *drbg)
+{
+ set_reseed_counter(drbg, reseed_counter(drbg) + 1);
+}
-err:
- uninstantiate(drbg);
- RAND_DRBG_free(drbg);
- return failures == 0;
+static time_t reseed_time(EVP_RAND_CTX *drbg)
+{
+ OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
+ time_t t;
+
+ *params = OSSL_PARAM_construct_time_t(OSSL_DRBG_PARAM_RESEED_TIME, &t);
+ if (EVP_RAND_CTX_get_params(drbg, params))
+ return t;
+ return 0;
}
/*
- * Initialise a DRBG based on selftest data
+ * When building the FIPS module, it isn't possible to disable the continuous
+ * RNG tests. Tests that require this are skipped and this means a detection
+ * mechanism for the FIPS provider being in use.
*/
-static int init(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td, TEST_CTX *t)
+static int using_fips_rng(void)
{
- if (!TEST_true(RAND_DRBG_set(drbg, td->nid, td->flags))
- || !TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
- kat_nonce, NULL)))
+ EVP_RAND_CTX *primary = RAND_get0_primary(NULL);
+ const OSSL_PROVIDER *prov;
+ const char *name;
+
+ if (!TEST_ptr(primary))
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;
+
+ prov = EVP_RAND_get0_provider(EVP_RAND_CTX_get0_rand(primary));
+ if (!TEST_ptr(prov))
+ return 0;
+ name = OSSL_PROVIDER_get0_name(prov);
+ return strcmp(name, "OpenSSL FIPS Provider") == 0;
}
-/*
- * Initialise and instantiate DRBG based on selftest data
+ /*
+ * Disable CRNG testing if it is enabled.
+ * This stub remains to indicate the calling locations where it is necessary.
+ * Once the RNG infrastructure is able to disable these tests, it should be
+ * reconstituted.
*/
-static int instantiate(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td,
- TEST_CTX *t)
+static int disable_crngt(EVP_RAND_CTX *drbg)
{
- 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.
+ * 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())
+ * |primary|, |public|, |private|: pointers to the three shared DRBGs
+ * |public_random|, |private_random|: generated random output
+ * |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_when|: if nonzero, used instead of time(NULL) to set the
+ * |before_reseed| time.
*/
-static int error_check(DRBG_SELFTEST_DATA *td)
+static int test_drbg_reseed(int expect_success,
+ EVP_RAND_CTX *primary,
+ EVP_RAND_CTX *public,
+ EVP_RAND_CTX *private,
+ unsigned char *public_random,
+ unsigned char *private_random,
+ int expect_primary_reseed,
+ int expect_public_reseed,
+ int expect_private_reseed,
+ time_t reseed_when
+ )
{
- static char zero[sizeof(RAND_DRBG)];
- 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(td->nid, td->flags, NULL))
- || !TEST_true(disable_crngt(drbg)))
- goto err;
+ time_t before_reseed, after_reseed;
+ int expected_state = (expect_success ? DRBG_READY : DRBG_ERROR);
+ unsigned int primary_reseed, public_reseed, private_reseed;
+ unsigned char dummy[RANDOM_SIZE];
+
+ if (public_random == NULL)
+ public_random = dummy;
+
+ if (private_random == NULL)
+ private_random = dummy;
/*
- * Personalisation string tests
+ * step 1: check preconditions
*/
- /* Test detection of too large personlisation string */
- if (!init(drbg, td, &t)
- || RAND_DRBG_instantiate(drbg, td->pers, drbg->max_perslen + 1) > 0)
- goto err;
+ /* Test whether seed propagation is enabled */
+ if (!TEST_int_ne(primary_reseed = reseed_counter(primary), 0)
+ || !TEST_int_ne(public_reseed = reseed_counter(public), 0)
+ || !TEST_int_ne(private_reseed = reseed_counter(private), 0))
+ return 0;
/*
- * Entropy source tests
+ * step 2: generate random output
*/
- /* Test entropy source failure detection: i.e. returns no data */
- t.entropylen = 0;
- if (TEST_int_le(RAND_DRBG_instantiate(drbg, td->pers, td->perslen), 0))
- 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;
+ if (reseed_when == 0)
+ reseed_when = time(NULL);
- /* Test insufficient entropy */
- t.entropylen = drbg->min_entropylen - 1;
- if (!init(drbg, td, &t)
- || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
- || !uninstantiate(drbg))
- goto err;
+ /* Generate random output from the public and private DRBG */
+ before_reseed = expect_primary_reseed == 1 ? reseed_when : 0;
+ if (!TEST_int_eq(rand_bytes((unsigned char*)public_random,
+ RANDOM_SIZE), expect_success)
+ || !TEST_int_eq(rand_priv_bytes((unsigned char*) private_random,
+ RANDOM_SIZE), expect_success))
+ return 0;
+ after_reseed = time(NULL);
- /* Test too much entropy */
- t.entropylen = drbg->max_entropylen + 1;
- if (!init(drbg, td, &t)
- || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
- || !uninstantiate(drbg))
- goto err;
/*
- * Nonce tests
+ * step 3: check postconditions
*/
- /* Test too small nonce */
- if (drbg->min_noncelen) {
- t.noncelen = drbg->min_noncelen - 1;
- if (!init(drbg, td, &t)
- || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
- || !uninstantiate(drbg))
- goto err;
+ /* Test whether reseeding succeeded as expected */
+ if (!TEST_int_eq(state(primary), expected_state)
+ || !TEST_int_eq(state(public), expected_state)
+ || !TEST_int_eq(state(private), expected_state))
+ return 0;
+
+ if (expect_primary_reseed >= 0) {
+ /* Test whether primary DRBG was reseeded as expected */
+ if (!TEST_int_ge(reseed_counter(primary), primary_reseed))
+ return 0;
}
- /* Test too large nonce */
- if (drbg->max_noncelen) {
- t.noncelen = drbg->max_noncelen + 1;
- if (!init(drbg, td, &t)
- || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
- || !uninstantiate(drbg))
- goto err;
+ if (expect_public_reseed >= 0) {
+ /* Test whether public DRBG was reseeded as expected */
+ if (!TEST_int_ge(reseed_counter(public), public_reseed)
+ || !TEST_uint_ge(reseed_counter(public),
+ reseed_counter(primary)))
+ return 0;
}
- /* 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;
+ if (expect_private_reseed >= 0) {
+ /* Test whether public DRBG was reseeded as expected */
+ if (!TEST_int_ge(reseed_counter(private), private_reseed)
+ || !TEST_uint_ge(reseed_counter(private),
+ reseed_counter(primary)))
+ return 0;
+ }
- /* 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;
+ if (expect_success == 1) {
+ /* Test whether reseed time of primary DRBG is set correctly */
+ if (!TEST_time_t_le(before_reseed, reseed_time(primary))
+ || !TEST_time_t_le(reseed_time(primary), after_reseed))
+ return 0;
- /* Try too large additional input */
- if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
- td->adin, drbg->max_adinlen + 1)))
- goto err;
+ /* Test whether reseed times of child DRBGs are synchronized with primary */
+ if (!TEST_time_t_ge(reseed_time(public), reseed_time(primary))
+ || !TEST_time_t_ge(reseed_time(private), reseed_time(primary)))
+ return 0;
+ } else {
+ ERR_clear_error();
+ }
- /*
- * 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;
+ return 1;
+}
- /* Instantiate again with valid data */
- if (!instantiate(drbg, td, &t))
- goto err;
- reseed_counter_tmp = drbg->reseed_gen_counter;
- drbg->reseed_gen_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->reseed_gen_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;
+#if defined(OPENSSL_SYS_UNIX)
+/* number of children to fork */
+#define DRBG_FORK_COUNT 9
+/* two results per child, two for the parent */
+#define DRBG_FORK_RESULT_COUNT (2 * (DRBG_FORK_COUNT + 1))
- /* Test reseed counter works */
- if (!instantiate(drbg, td, &t))
- goto err;
- reseed_counter_tmp = drbg->reseed_gen_counter;
- drbg->reseed_gen_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->reseed_gen_counter, reseed_counter_tmp + 1)
- || !uninstantiate(drbg))
- goto err;
+typedef struct drbg_fork_result_st {
- /*
- * Explicit reseed tests
- */
+ unsigned char random[RANDOM_SIZE]; /* random output */
- /* Test explicit reseed with too large additional input */
- if (!instantiate(drbg, td, &t)
- || RAND_DRBG_reseed(drbg, td->adin, drbg->max_adinlen + 1, 0) > 0)
- goto err;
+ int pindex; /* process index (0: parent, 1,2,3...: children)*/
+ pid_t pid; /* process id */
+ int private; /* true if the private drbg was used */
+ char name[10]; /* 'parent' resp. 'child 1', 'child 2', ... */
+} drbg_fork_result;
- /* Test explicit reseed with entropy source failure */
- t.entropylen = 0;
- if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0), 0)
- || !uninstantiate(drbg))
- goto err;
+/*
+ * Sort the drbg_fork_result entries in lexicographical order
+ *
+ * This simplifies finding duplicate random output and makes
+ * the printout in case of an error more readable.
+ */
+static int compare_drbg_fork_result(const void * left, const void * right)
+{
+ int result;
+ const drbg_fork_result *l = left;
+ const drbg_fork_result *r = right;
- /* Test explicit reseed with too much entropy */
- if (!instantiate(drbg, td, &t))
- goto err;
- t.entropylen = drbg->max_entropylen + 1;
- if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0), 0)
- || !uninstantiate(drbg))
- goto err;
+ /* separate public and private results */
+ result = l->private - r->private;
- /* Test explicit reseed with too little entropy */
- if (!instantiate(drbg, td, &t))
- goto err;
- t.entropylen = drbg->min_entropylen - 1;
- if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0), 0)
- || !uninstantiate(drbg))
- goto err;
+ if (result == 0)
+ result = memcmp(l->random, r->random, RANDOM_SIZE);
- /* Standard says we have to check uninstantiate really zeroes */
- if (!TEST_mem_eq(zero, sizeof(drbg->data), &drbg->data, sizeof(drbg->data)))
- goto err;
+ if (result == 0)
+ result = l->pindex - r->pindex;
- ret = 1;
+ return result;
+}
-err:
- uninstantiate(drbg);
- RAND_DRBG_free(drbg);
- return ret;
+/*
+ * Sort two-byte chunks of random data
+ *
+ * Used for finding collisions in two-byte chunks
+ */
+static int compare_rand_chunk(const void * left, const void * right)
+{
+ return memcmp(left, right, 2);
}
-static int test_kats(int i)
+/*
+ * Test whether primary, public and private DRBG are reseeded
+ * in the child after forking the process. Collect the random
+ * output of the public and private DRBG and send it back to
+ * the parent process.
+ */
+static int test_drbg_reseed_in_child(EVP_RAND_CTX *primary,
+ EVP_RAND_CTX *public,
+ EVP_RAND_CTX *private,
+ drbg_fork_result result[2])
{
- DRBG_SELFTEST_DATA *td = &drbg_test[i];
- int rv = 0;
+ int rv = 0, status;
+ int fd[2];
+ pid_t pid;
+ unsigned char random[2 * RANDOM_SIZE];
- if (!single_kat(td))
- goto err;
- rv = 1;
+ if (!TEST_int_ge(pipe(fd), 0))
+ return 0;
-err:
- return rv;
-}
+ if (!TEST_int_ge(pid = fork(), 0)) {
+ close(fd[0]);
+ close(fd[1]);
+ return 0;
+ } else if (pid > 0) {
-static int test_error_checks(int i)
-{
- DRBG_SELFTEST_DATA *td = &drbg_test[i];
- int rv = 0;
+ /* I'm the parent; close the write end */
+ close(fd[1]);
- if (error_check(td))
- goto err;
- rv = 1;
+ /* wait for children to terminate and collect their random output */
+ if (TEST_int_eq(waitpid(pid, &status, 0), pid)
+ && TEST_int_eq(status, 0)
+ && TEST_true(read(fd[0], &random[0], sizeof(random))
+ == sizeof(random))) {
-err:
- return rv;
-}
+ /* random output of public drbg */
+ result[0].pid = pid;
+ result[0].private = 0;
+ memcpy(result[0].random, &random[0], RANDOM_SIZE);
-/*
- * 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;
+ /* random output of private drbg */
+ result[1].pid = pid;
+ result[1].private = 1;
+ memcpy(result[1].random, &random[RANDOM_SIZE], RANDOM_SIZE);
-static HOOK_CTX master_ctx, public_ctx, private_ctx;
+ rv = 1;
+ }
-static HOOK_CTX *get_hook_ctx(RAND_DRBG *drbg)
-{
- return (HOOK_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
-}
+ /* close the read end */
+ close(fd[0]);
-/* 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);
+ return rv;
- if (ctx->fail != 0)
- return 0;
+ } else {
- ret = ctx->get_entropy(drbg, pout, entropy, min_len, max_len,
- prediction_resistance);
+ /* I'm the child; close the read end */
+ close(fd[0]);
- if (ret != 0)
- ctx->reseed_count++;
- return ret;
-}
+ /* check whether all three DRBGs reseed and send output to parent */
+ if (TEST_true(test_drbg_reseed(1, primary, public, private,
+ &random[0], &random[RANDOM_SIZE],
+ 1, 1, 1, 0))
+ && TEST_true(write(fd[1], random, sizeof(random))
+ == sizeof(random))) {
-/* 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);
-}
+ rv = 1;
+ }
-/* 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);
+ /* close the write end */
+ close(fd[1]);
- drbg->get_entropy = ctx->get_entropy;
- CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DRBG, drbg, &drbg->ex_data);
+ /* convert boolean to exit code */
+ exit(rv == 0);
+ }
}
-/* Resets the given hook context */
-static void reset_hook_ctx(HOOK_CTX *ctx)
+static int test_rand_reseed_on_fork(EVP_RAND_CTX *primary,
+ EVP_RAND_CTX *public,
+ EVP_RAND_CTX *private)
{
- ctx->fail = 0;
- ctx->reseed_count = 0;
-}
+ unsigned int i;
+ pid_t pid = getpid();
+ int verbose = (getenv("V") != NULL);
+ int success = 1;
+ int duplicate[2] = {0, 0};
+ unsigned char random[2 * RANDOM_SIZE];
+ unsigned char sample[DRBG_FORK_RESULT_COUNT * RANDOM_SIZE];
+ unsigned char *psample = &sample[0];
+ drbg_fork_result result[DRBG_FORK_RESULT_COUNT];
+ drbg_fork_result *presult = &result[2];
-/* 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);
-}
+ memset(&result, 0, sizeof(result));
-/*
- * 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);
+ for (i = 1 ; i <= DRBG_FORK_COUNT ; ++i) {
- /*
- * step 1: check preconditions
- */
+ presult[0].pindex = presult[1].pindex = i;
- /* Test whether seed propagation is enabled */
- if (!TEST_int_ne(master->reseed_prop_counter, 0)
- || !TEST_int_ne(public->reseed_prop_counter, 0)
- || !TEST_int_ne(private->reseed_prop_counter, 0))
- return 0;
+ sprintf(presult[0].name, "child %d", i);
+ strcpy(presult[1].name, presult[0].name);
- /* Check whether the master DRBG's reseed counter is the largest one */
- if (!TEST_int_le(public->reseed_prop_counter, master->reseed_prop_counter)
- || !TEST_int_le(private->reseed_prop_counter, master->reseed_prop_counter))
+ /* collect the random output of the children */
+ if (!TEST_true(test_drbg_reseed_in_child(primary,
+ public,
+ private,
+ presult)))
+ return 0;
+
+ presult += 2;
+ }
+
+ /* collect the random output of the parent */
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ &random[0], &random[RANDOM_SIZE],
+ 0, 0, 0, 0)))
return 0;
- /*
- * step 2: generate random output
- */
+ strcpy(result[0].name, "parent");
+ strcpy(result[1].name, "parent");
- if (reseed_time == 0)
- reseed_time = time(NULL);
+ /* output of public drbg */
+ result[0].pid = pid;
+ result[0].private = 0;
+ memcpy(result[0].random, &random[0], RANDOM_SIZE);
- /* 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);
+ /* output of private drbg */
+ result[1].pid = pid;
+ result[1].private = 1;
+ memcpy(result[1].random, &random[RANDOM_SIZE], RANDOM_SIZE);
+ /* collect all sampled random data in a single buffer */
+ for (i = 0 ; i < DRBG_FORK_RESULT_COUNT ; ++i) {
+ memcpy(psample, &result[i].random[0], RANDOM_SIZE);
+ psample += RANDOM_SIZE;
+ }
- /*
- * step 3: check postconditions
- */
+ /* sort the results... */
+ qsort(result, DRBG_FORK_RESULT_COUNT, sizeof(drbg_fork_result),
+ compare_drbg_fork_result);
- /* 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;
+ /* ...and count duplicate prefixes by looking at the first byte only */
+ for (i = 1 ; i < DRBG_FORK_RESULT_COUNT ; ++i) {
+ if (result[i].random[0] == result[i-1].random[0]) {
+ /* count public and private duplicates separately */
+ ++duplicate[result[i].private];
+ }
+ }
- 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 (duplicate[0] >= DRBG_FORK_COUNT - 1) {
+ /* just too many duplicates to be a coincidence */
+ TEST_note("ERROR: %d duplicate prefixes in public random output", duplicate[0]);
+ success = 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 (duplicate[1] >= DRBG_FORK_COUNT - 1) {
+ /* just too many duplicates to be a coincidence */
+ TEST_note("ERROR: %d duplicate prefixes in private random output", duplicate[1]);
+ success = 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;
+ duplicate[0] = 0;
+
+ /* sort the two-byte chunks... */
+ qsort(sample, sizeof(sample)/2, 2, compare_rand_chunk);
+
+ /* ...and count duplicate chunks */
+ for (i = 2, psample = sample + 2 ; i < sizeof(sample) ; i += 2, psample += 2) {
+ if (compare_rand_chunk(psample - 2, psample) == 0)
+ ++duplicate[0];
}
- if (expect_success == 1) {
- /* Test whether all three reseed counters are synchronized */
- if (!TEST_int_eq(public->reseed_prop_counter, master->reseed_prop_counter)
- || !TEST_int_eq(private->reseed_prop_counter, master->reseed_prop_counter))
- return 0;
+ if (duplicate[0] >= DRBG_FORK_COUNT - 1) {
+ /* just too many duplicates to be a coincidence */
+ TEST_note("ERROR: %d duplicate chunks in random output", duplicate[0]);
+ success = 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;
+ if (verbose || !success) {
- /* 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();
+ for (i = 0 ; i < DRBG_FORK_RESULT_COUNT ; ++i) {
+ char *rand_hex = OPENSSL_buf2hexstr(result[i].random, RANDOM_SIZE);
+
+ TEST_note(" random: %s, pid: %d (%s, %s)",
+ rand_hex,
+ result[i].pid,
+ result[i].name,
+ result[i].private ? "private" : "public"
+ );
+
+ OPENSSL_free(rand_hex);
+ }
}
- return 1;
+ return success;
}
+static int test_rand_fork_safety(int i)
+{
+ int success = 1;
+ unsigned char random[1];
+ EVP_RAND_CTX *primary, *public, *private;
+
+ /* All three DRBGs should be non-null */
+ if (!TEST_ptr(primary = RAND_get0_primary(NULL))
+ || !TEST_ptr(public = RAND_get0_public(NULL))
+ || !TEST_ptr(private = RAND_get0_private(NULL)))
+ return 0;
+
+ /* run the actual test */
+ if (!TEST_true(test_rand_reseed_on_fork(primary, public, private)))
+ success = 0;
+
+ /* request a single byte from each of the DRBGs before the next run */
+ if (!TEST_int_gt(RAND_bytes(random, 1), 0) || !TEST_int_gt(RAND_priv_bytes(random, 1), 0))
+ success = 0;
+
+ return success;
+}
+#endif
+
/*
* Test whether the default rand_method (RAND_OpenSSL()) is
- * setup correctly, in particular whether reseeding works
+ * setup correctly, in particular whether reseeding works
* as designed.
*/
-static int test_rand_drbg_reseed(void)
+static int test_rand_reseed(void)
{
- RAND_DRBG *master, *public, *private;
+ EVP_RAND_CTX *primary, *public, *private;
unsigned char rand_add_buf[256];
- int rv=0;
+ int rv = 0;
time_t before_reseed;
+ if (using_fips_rng())
+ return TEST_skip("CRNGT cannot be disabled");
+
+#ifndef OPENSSL_NO_DEPRECATED_3_0
/* Check whether RAND_OpenSSL() is the default method */
if (!TEST_ptr_eq(RAND_get_rand_method(), RAND_OpenSSL()))
return 0;
+#endif
/* 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()))
+ if (!TEST_ptr(primary = RAND_get0_primary(NULL))
+ || !TEST_ptr(public = RAND_get0_public(NULL))
+ || !TEST_ptr(private = RAND_get0_private(NULL)))
return 0;
- /* There should be three distinct DRBGs, two of them chained to master */
+ /* There should be three distinct DRBGs, two of them chained to primary */
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))
+ || !TEST_ptr_ne(public, primary)
+ || !TEST_ptr_ne(private, primary)
+ || !TEST_ptr_eq(prov_rand(public)->parent, prov_rand(primary))
+ || !TEST_ptr_eq(prov_rand(private)->parent, prov_rand(primary)))
return 0;
- /* Disable CRNG testing for the master DRBG */
- if (!TEST_true(disable_crngt(master)))
+ /* Disable CRNG testing for the primary DRBG */
+ if (!TEST_true(disable_crngt(primary)))
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);
-
+ EVP_RAND_uninstantiate(primary);
+ EVP_RAND_uninstantiate(private);
+ EVP_RAND_uninstantiate(public);
/*
* Test initial seeding of shared DRBGs
*/
- if (!TEST_true(test_drbg_reseed(1, master, public, private, 1, 1, 1, 0)))
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 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)))
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 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.
+ * reseed counters differ from the primary's reseed counter.
*/
- master->reseed_prop_counter++;
- if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 1, 0)))
+ inc_reseed_counter(primary);
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 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.
+ * from the primary's reseed counter.
*/
- master->reseed_prop_counter++;
- private->reseed_prop_counter++;
- if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 0, 0)))
+ inc_reseed_counter(primary);
+ inc_reseed_counter(private);
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 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.
+ * from the primary's reseed counter.
*/
- master->reseed_prop_counter++;
- public->reseed_prop_counter++;
- if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 0, 1, 0)))
+ inc_reseed_counter(primary);
+ inc_reseed_counter(public);
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 0, 0, 1, 0)))
goto error;
- reset_drbg_hook_ctx();
-
/* fill 'randomness' buffer with some arbitrary data */
memset(rand_add_buf, 'r', sizeof(rand_add_buf));
-#ifndef FIPS_MODE
/*
* 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
+ * test_drbg_reseed() test, because the primary 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
+ * before_reseed <= reseed_time(primary) 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,
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 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_prop_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();
-#else /* FIPS_MODE */
- /*
- * In FIPS mode, random data provided by the application via RAND_add()
- * is not considered a trusted entropy source. It is only treated as
- * additional_data and no reseeding is forced. This test assures that
- * no reseeding occurs.
- */
- 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, 0, 0, 0,
- before_reseed)))
- goto error;
- reset_drbg_hook_ctx();
-#endif
rv = 1;
error:
- /* Remove hooks */
- unhook_drbg(master);
- unhook_drbg(public);
- unhook_drbg(private);
-
- return rv;
+ return rv;
}
#if defined(OPENSSL_THREADS)
static int multi_thread_rand_bytes_succeeded = 1;
static int multi_thread_rand_priv_bytes_succeeded = 1;
+static int set_reseed_time_interval(EVP_RAND_CTX *drbg, int t)
+{
+ OSSL_PARAM params[2];
+
+ params[0] = OSSL_PARAM_construct_int(OSSL_DRBG_PARAM_RESEED_TIME_INTERVAL,
+ &t);
+ params[1] = OSSL_PARAM_construct_end();
+ return EVP_RAND_CTX_set_params(drbg, params);
+}
+
static void run_multi_thread_test(void)
{
unsigned char buf[256];
time_t start = time(NULL);
- RAND_DRBG *public = NULL, *private = NULL;
+ EVP_RAND_CTX *public = NULL, *private = NULL;
- if (!TEST_ptr(public = RAND_DRBG_get0_public())
- || !TEST_ptr(private = RAND_DRBG_get0_private())) {
+ if (!TEST_ptr(public = RAND_get0_public(NULL))
+ || !TEST_ptr(private = RAND_get0_private(NULL))
+ || !TEST_true(set_reseed_time_interval(private, 1))
+ || !TEST_true(set_reseed_time_interval(public, 1))) {
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)
+ if (rand_bytes(buf, sizeof(buf)) <= 0)
multi_thread_rand_bytes_succeeded = 0;
- if (RAND_priv_bytes(buf, sizeof(buf)) <= 0)
+ if (rand_priv_bytes(buf, sizeof(buf)) <= 0)
multi_thread_rand_priv_bytes_succeeded = 0;
}
- while(time(NULL) - start < 5);
+ while (time(NULL) - start < 5);
}
# if defined(OPENSSL_SYS_WINDOWS)
}
#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)
+static EVP_RAND_CTX *new_drbg(EVP_RAND_CTX *parent)
{
- 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())
- || !TEST_true(disable_crngt(master)))
- return 0;
-
-#ifdef OPENSSL_RAND_SEED_NONE
- required_seed_buflen = rand_drbg_seedlen(master);
-#endif
-
- memset(rand_buf, 0xCD, sizeof(rand_buf));
+ OSSL_PARAM params[2];
+ EVP_RAND *rand = NULL;
+ EVP_RAND_CTX *drbg = NULL;
- for ( rand_buflen = 256 ; rand_buflen > 0 ; --rand_buflen ) {
- RAND_DRBG_uninstantiate(master);
- RAND_seed(rand_buf, rand_buflen);
+ params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DRBG_PARAM_CIPHER,
+ "AES-256-CTR", 0);
+ params[1] = OSSL_PARAM_construct_end();
- if (!TEST_int_eq(RAND_status(),
- (rand_buflen >= required_seed_buflen)))
- return 0;
+ if (!TEST_ptr(rand = EVP_RAND_fetch(NULL, "CTR-DRBG", NULL))
+ || !TEST_ptr(drbg = EVP_RAND_CTX_new(rand, parent))
+ || !TEST_true(EVP_RAND_CTX_set_params(drbg, params))) {
+ EVP_RAND_CTX_free(drbg);
+ drbg = NULL;
}
-
- return 1;
+ EVP_RAND_free(rand);
+ return drbg;
}
-/*
- * 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)
+static int test_rand_prediction_resistance(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;
-}
-
-static int test_rand_drbg_prediction_resistance(void)
-{
- RAND_DRBG *m = NULL, *i = NULL, *s = NULL;
+ EVP_RAND_CTX *x = NULL, *y = NULL, *z = NULL;
unsigned char buf1[51], buf2[sizeof(buf1)];
- int ret = 0, mreseed, ireseed, sreseed;
+ int ret = 0, xreseed, yreseed, zreseed;
+
+ if (using_fips_rng())
+ return TEST_skip("CRNGT cannot be disabled");
/* Initialise a three long DRBG chain */
- if (!TEST_ptr(m = RAND_DRBG_new(0, 0, NULL))
- || !TEST_true(disable_crngt(m))
- || !TEST_true(RAND_DRBG_instantiate(m, NULL, 0))
- || !TEST_ptr(i = RAND_DRBG_new(0, 0, m))
- || !TEST_true(RAND_DRBG_instantiate(i, NULL, 0))
- || !TEST_ptr(s = RAND_DRBG_new(0, 0, i))
- || !TEST_true(RAND_DRBG_instantiate(s, NULL, 0)))
+ if (!TEST_ptr(x = new_drbg(NULL))
+ || !TEST_true(disable_crngt(x))
+ || !TEST_true(EVP_RAND_instantiate(x, 0, 0, NULL, 0, NULL))
+ || !TEST_ptr(y = new_drbg(x))
+ || !TEST_true(EVP_RAND_instantiate(y, 0, 0, NULL, 0, NULL))
+ || !TEST_ptr(z = new_drbg(y))
+ || !TEST_true(EVP_RAND_instantiate(z, 0, 0, NULL, 0, NULL)))
goto err;
- /* During a normal reseed, only the slave DRBG should be reseed */
- mreseed = ++m->reseed_prop_counter;
- ireseed = ++i->reseed_prop_counter;
- sreseed = s->reseed_prop_counter;
- if (!TEST_true(RAND_DRBG_reseed(s, NULL, 0, 0))
- || !TEST_int_eq(m->reseed_prop_counter, mreseed)
- || !TEST_int_eq(i->reseed_prop_counter, ireseed)
- || !TEST_int_gt(s->reseed_prop_counter, sreseed))
+ /*
+ * During a normal reseed, only the last DRBG in the chain should
+ * be reseeded.
+ */
+ inc_reseed_counter(y);
+ xreseed = reseed_counter(x);
+ yreseed = reseed_counter(y);
+ zreseed = reseed_counter(z);
+ if (!TEST_true(EVP_RAND_reseed(z, 0, NULL, 0, NULL, 0))
+ || !TEST_int_eq(reseed_counter(x), xreseed)
+ || !TEST_int_eq(reseed_counter(y), yreseed)
+ || !TEST_int_gt(reseed_counter(z), zreseed))
goto err;
/*
* When prediction resistance is requested, the request should be
- * propagated to the master, so that the entire DRBG chain reseeds.
+ * propagated to the primary, so that the entire DRBG chain reseeds.
*/
- sreseed = s->reseed_prop_counter;
- if (!TEST_true(RAND_DRBG_reseed(s, NULL, 0, 1))
- || !TEST_int_gt(m->reseed_prop_counter, mreseed)
- || !TEST_int_gt(i->reseed_prop_counter, ireseed)
- || !TEST_int_gt(s->reseed_prop_counter, sreseed))
+ zreseed = reseed_counter(z);
+ if (!TEST_true(EVP_RAND_reseed(z, 1, NULL, 0, NULL, 0))
+ || !TEST_int_gt(reseed_counter(x), xreseed)
+ || !TEST_int_gt(reseed_counter(y), yreseed)
+ || !TEST_int_gt(reseed_counter(z), zreseed))
goto err;
- /* During a normal generate, only the slave DRBG should be reseed */
- mreseed = ++m->reseed_prop_counter;
- ireseed = ++i->reseed_prop_counter;
- sreseed = s->reseed_prop_counter;
- if (!TEST_true(RAND_DRBG_generate(s, buf1, sizeof(buf1), 0, NULL, 0))
- || !TEST_int_eq(m->reseed_prop_counter, mreseed)
- || !TEST_int_eq(i->reseed_prop_counter, ireseed)
- || !TEST_int_gt(s->reseed_prop_counter, sreseed))
+ /*
+ * During a normal generate, only the last DRBG should be reseed */
+ inc_reseed_counter(y);
+ xreseed = reseed_counter(x);
+ yreseed = reseed_counter(y);
+ zreseed = reseed_counter(z);
+ if (!TEST_true(EVP_RAND_generate(z, buf1, sizeof(buf1), 0, 0, NULL, 0))
+ || !TEST_int_eq(reseed_counter(x), xreseed)
+ || !TEST_int_eq(reseed_counter(y), yreseed)
+ || !TEST_int_gt(reseed_counter(z), zreseed))
goto err;
/*
* When a prediction resistant generate is requested, the request
- * should be propagated to the master, reseeding the entire DRBG chain.
+ * should be propagated to the primary, reseeding the entire DRBG chain.
*/
- sreseed = s->reseed_prop_counter;
- if (!TEST_true(RAND_DRBG_generate(s, buf2, sizeof(buf2), 1, NULL, 0))
- || !TEST_int_gt(m->reseed_prop_counter, mreseed)
- || !TEST_int_gt(i->reseed_prop_counter, ireseed)
- || !TEST_int_gt(s->reseed_prop_counter, sreseed)
+ zreseed = reseed_counter(z);
+ if (!TEST_true(EVP_RAND_generate(z, buf2, sizeof(buf2), 0, 1, NULL, 0))
+ || !TEST_int_gt(reseed_counter(x), xreseed)
+ || !TEST_int_gt(reseed_counter(y), yreseed)
+ || !TEST_int_gt(reseed_counter(z), zreseed)
|| !TEST_mem_ne(buf1, sizeof(buf1), buf2, sizeof(buf2)))
goto err;
- /* Verify that a normal reseed still only reseeds the slave DRBG */
- mreseed = ++m->reseed_prop_counter;
- ireseed = ++i->reseed_prop_counter;
- sreseed = s->reseed_prop_counter;
- if (!TEST_true(RAND_DRBG_reseed(s, NULL, 0, 0))
- || !TEST_int_eq(m->reseed_prop_counter, mreseed)
- || !TEST_int_eq(i->reseed_prop_counter, ireseed)
- || !TEST_int_gt(s->reseed_prop_counter, sreseed))
+ /* Verify that a normal reseed still only reseeds the last DRBG */
+ inc_reseed_counter(y);
+ xreseed = reseed_counter(x);
+ yreseed = reseed_counter(y);
+ zreseed = reseed_counter(z);
+ if (!TEST_true(EVP_RAND_reseed(z, 0, NULL, 0, NULL, 0))
+ || !TEST_int_eq(reseed_counter(x), xreseed)
+ || !TEST_int_eq(reseed_counter(y), yreseed)
+ || !TEST_int_gt(reseed_counter(z), zreseed))
goto err;
ret = 1;
err:
- RAND_DRBG_free(s);
- RAND_DRBG_free(i);
- RAND_DRBG_free(m);
+ EVP_RAND_CTX_free(z);
+ EVP_RAND_CTX_free(y);
+ EVP_RAND_CTX_free(x);
return ret;
}
-static int test_multi_set(void)
-{
- int rv = 0;
- RAND_DRBG *drbg = NULL;
-
- /* init drbg with default CTR initializer */
- if (!TEST_ptr(drbg = RAND_DRBG_new(0, 0, NULL))
- || !TEST_true(disable_crngt(drbg)))
- goto err;
- /* change it to use hmac */
- if (!TEST_true(RAND_DRBG_set(drbg, NID_sha1, RAND_DRBG_FLAG_HMAC)))
- goto err;
- /* use same type */
- if (!TEST_true(RAND_DRBG_set(drbg, NID_sha1, RAND_DRBG_FLAG_HMAC)))
- goto err;
- /* change it to use hash */
- if (!TEST_true(RAND_DRBG_set(drbg, NID_sha256, 0)))
- goto err;
- /* use same type */
- if (!TEST_true(RAND_DRBG_set(drbg, NID_sha256, 0)))
- goto err;
- /* change it to use ctr */
- if (!TEST_true(RAND_DRBG_set(drbg, NID_aes_192_ctr, 0)))
- goto err;
- /* use same type */
- if (!TEST_true(RAND_DRBG_set(drbg, NID_aes_192_ctr, 0)))
- goto err;
- if (!TEST_int_gt(RAND_DRBG_instantiate(drbg, NULL, 0), 0))
- goto err;
-
- rv = 1;
-err:
- uninstantiate(drbg);
- RAND_DRBG_free(drbg);
- return rv;
-}
-
-static int test_set_defaults(void)
-{
- RAND_DRBG *master = NULL, *public = NULL, *private = NULL;
-
- /* Check the default type and flags for master, public and private */
- return TEST_ptr(master = RAND_DRBG_get0_master())
- && TEST_ptr(public = RAND_DRBG_get0_public())
- && TEST_ptr(private = RAND_DRBG_get0_private())
- && TEST_int_eq(master->type, RAND_DRBG_TYPE)
- && TEST_int_eq(master->flags,
- RAND_DRBG_FLAGS | RAND_DRBG_FLAG_MASTER)
- && TEST_int_eq(public->type, RAND_DRBG_TYPE)
- && TEST_int_eq(public->flags,
- RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
- && TEST_int_eq(private->type, RAND_DRBG_TYPE)
- && TEST_int_eq(private->flags,
- RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PRIVATE)
-
- /* change master DRBG and check again */
- && TEST_true(RAND_DRBG_set_defaults(NID_sha256,
- RAND_DRBG_FLAG_MASTER))
- && TEST_true(RAND_DRBG_uninstantiate(master))
- && TEST_int_eq(master->type, NID_sha256)
- && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
- && TEST_int_eq(public->type, RAND_DRBG_TYPE)
- && TEST_int_eq(public->flags,
- RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
- && TEST_int_eq(private->type, RAND_DRBG_TYPE)
- && TEST_int_eq(private->flags,
- RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PRIVATE)
- /* change private DRBG and check again */
- && TEST_true(RAND_DRBG_set_defaults(NID_sha256,
- RAND_DRBG_FLAG_PRIVATE|RAND_DRBG_FLAG_HMAC))
- && TEST_true(RAND_DRBG_uninstantiate(private))
- && TEST_int_eq(master->type, NID_sha256)
- && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
- && TEST_int_eq(public->type, RAND_DRBG_TYPE)
- && TEST_int_eq(public->flags,
- RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
- && TEST_int_eq(private->type, NID_sha256)
- && TEST_int_eq(private->flags,
- RAND_DRBG_FLAG_PRIVATE | RAND_DRBG_FLAG_HMAC)
- /* change public DRBG and check again */
- && TEST_true(RAND_DRBG_set_defaults(NID_sha1,
- RAND_DRBG_FLAG_PUBLIC
- | RAND_DRBG_FLAG_HMAC))
- && TEST_true(RAND_DRBG_uninstantiate(public))
- && TEST_int_eq(master->type, NID_sha256)
- && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
- && TEST_int_eq(public->type, NID_sha1)
- && TEST_int_eq(public->flags,
- RAND_DRBG_FLAG_PUBLIC | RAND_DRBG_FLAG_HMAC)
- && TEST_int_eq(private->type, NID_sha256)
- && TEST_int_eq(private->flags,
- RAND_DRBG_FLAG_PRIVATE | RAND_DRBG_FLAG_HMAC)
- /* Change DRBG defaults and change public and check again */
- && TEST_true(RAND_DRBG_set_defaults(NID_sha256, 0))
- && TEST_true(RAND_DRBG_uninstantiate(public))
- && TEST_int_eq(public->type, NID_sha256)
- && TEST_int_eq(public->flags, RAND_DRBG_FLAG_PUBLIC)
-
- /* FIPS mode doesn't support CTR DRBG without a derivation function */
-#ifndef FIPS_MODE
- /* Change DRBG defaults and change master and check again */
- && TEST_true(RAND_DRBG_set_defaults(NID_aes_256_ctr,
- RAND_DRBG_FLAG_CTR_NO_DF))
- && TEST_true(RAND_DRBG_uninstantiate(master))
- && TEST_int_eq(master->type, NID_aes_256_ctr)
- && TEST_int_eq(master->flags,
- RAND_DRBG_FLAG_MASTER|RAND_DRBG_FLAG_CTR_NO_DF)
-#endif
- /* Reset back to the standard defaults */
- && TEST_true(RAND_DRBG_set_defaults(RAND_DRBG_TYPE,
- RAND_DRBG_FLAGS
- | RAND_DRBG_FLAG_MASTER
- | RAND_DRBG_FLAG_PUBLIC
- | RAND_DRBG_FLAG_PRIVATE))
- && TEST_true(RAND_DRBG_uninstantiate(master))
- && TEST_true(RAND_DRBG_uninstantiate(public))
- && TEST_true(RAND_DRBG_uninstantiate(private));
-}
-
-/*
- * A list of the FIPS DRGB types.
- * Because of the way HMAC DRGBs are implemented, both the NID and flags
- * are required.
- */
-static const struct s_drgb_types {
- int nid;
- int flags;
-} drgb_types[] = {
- { NID_aes_128_ctr, 0 },
- { NID_aes_192_ctr, 0 },
- { NID_aes_256_ctr, 0 },
- { NID_sha1, 0 },
- { NID_sha224, 0 },
- { NID_sha256, 0 },
- { NID_sha384, 0 },
- { NID_sha512, 0 },
- { NID_sha512_224, 0 },
- { NID_sha512_256, 0 },
- { NID_sha3_224, 0 },
- { NID_sha3_256, 0 },
- { NID_sha3_384, 0 },
- { NID_sha3_512, 0 },
- { NID_sha1, RAND_DRBG_FLAG_HMAC },
- { NID_sha224, RAND_DRBG_FLAG_HMAC },
- { NID_sha256, RAND_DRBG_FLAG_HMAC },
- { NID_sha384, RAND_DRBG_FLAG_HMAC },
- { NID_sha512, RAND_DRBG_FLAG_HMAC },
- { NID_sha512_224, RAND_DRBG_FLAG_HMAC },
- { NID_sha512_256, RAND_DRBG_FLAG_HMAC },
- { NID_sha3_224, RAND_DRBG_FLAG_HMAC },
- { NID_sha3_256, RAND_DRBG_FLAG_HMAC },
- { NID_sha3_384, RAND_DRBG_FLAG_HMAC },
- { NID_sha3_512, RAND_DRBG_FLAG_HMAC },
-};
-
-/* Six cases for each covers seed sizes up to 32 bytes */
-static const size_t crngt_num_cases = 6;
-
-static size_t crngt_case, crngt_idx;
-
-static int crngt_entropy_cb(OPENSSL_CTX *ctx, unsigned char *buf,
- unsigned char *md,
- unsigned int *md_size)
-{
- size_t i, z;
-
- if (!TEST_int_lt(crngt_idx, crngt_num_cases))
- return 0;
- /* Generate a block of unique data unless this is the duplication point */
- z = crngt_idx++;
- if (z > 0 && crngt_case == z)
- z--;
- for (i = 0; i < CRNGT_BUFSIZ; i++)
- buf[i] = (unsigned char)(i + 'A' + z);
- return EVP_Digest(buf, CRNGT_BUFSIZ, md, md_size, EVP_sha256(), NULL);
-}
-
-static int test_crngt(int n)
-{
- const struct s_drgb_types *dt = drgb_types + n / crngt_num_cases;
- RAND_DRBG *drbg = NULL;
- unsigned char buff[100];
- size_t ent;
- int res = 0;
- int expect;
- OPENSSL_CTX *ctx = OPENSSL_CTX_new();
-
- if (!TEST_ptr(ctx))
- return 0;
- if (!TEST_ptr(drbg = RAND_DRBG_new_ex(ctx, dt->nid, dt->flags, NULL)))
- goto err;
- ent = (drbg->min_entropylen + CRNGT_BUFSIZ - 1) / CRNGT_BUFSIZ;
- crngt_case = n % crngt_num_cases;
- crngt_idx = 0;
- crngt_get_entropy = &crngt_entropy_cb;
-#ifndef FIPS_MODE
- if (!TEST_true(RAND_DRBG_set_callbacks(drbg, &rand_crngt_get_entropy,
- &rand_crngt_cleanup_entropy,
- &rand_drbg_get_nonce,
- &rand_drbg_cleanup_nonce)))
- goto err;
-#endif
- expect = crngt_case == 0 || crngt_case > ent;
- if (!TEST_int_eq(RAND_DRBG_instantiate(drbg, NULL, 0), expect))
- goto err;
- if (!expect)
- goto fin;
- if (!TEST_true(RAND_DRBG_generate(drbg, buff, sizeof(buff), 0, NULL, 0)))
- goto err;
-
- expect = crngt_case == 0 || crngt_case > 2 * ent;
- if (!TEST_int_eq(RAND_DRBG_reseed(drbg, NULL, 0, 0), expect))
- goto err;
- if (!expect)
- goto fin;
- if (!TEST_true(RAND_DRBG_generate(drbg, buff, sizeof(buff), 0, NULL, 0)))
- goto err;
-
-fin:
- res = 1;
-err:
- if (!res)
- TEST_note("DRBG %zd case %zd block %zd", n / crngt_num_cases,
- crngt_case, crngt_idx);
- uninstantiate(drbg);
- RAND_DRBG_free(drbg);
- crngt_get_entropy = &rand_crngt_get_entropy_cb;
- OPENSSL_CTX_free(ctx);
- return res;
-}
-
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);
- ADD_TEST(test_rand_drbg_prediction_resistance);
- ADD_TEST(test_multi_set);
- ADD_TEST(test_set_defaults);
+ ADD_TEST(test_rand_reseed);
+#if defined(OPENSSL_SYS_UNIX)
+ ADD_ALL_TESTS(test_rand_fork_safety, RANDOM_SIZE);
+#endif
+ ADD_TEST(test_rand_prediction_resistance);
#if defined(OPENSSL_THREADS)
ADD_TEST(test_multi_thread);
#endif
- ADD_ALL_TESTS(test_crngt, crngt_num_cases * OSSL_NELEM(drgb_types));
return 1;
}