/*
- * Copyright 2011-2017 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2011-2023 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * 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
* in the file LICENSE in the source distribution or at
* 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/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
+
+#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) \
+
+/*
+ * DRBG generate wrappers
+ */
+static int gen_bytes(EVP_RAND_CTX *drbg, unsigned char *buf, int num)
+{
+#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
-#define make_drbg_test_data_df(nid, pr, p) \
- make_drbg_test_data(nid, RAND_DRBG_FLAG_CTR_USE_DF, pr, p)
+ if (drbg != NULL)
+ return EVP_RAND_generate(drbg, buf, num, 0, 0, NULL, 0);
+ return 0;
+}
-static DRBG_SELFTEST_DATA drbg_test[] = {
- make_drbg_test_data (NID_aes_128_ctr, 0, aes_128_no_df, 0),
- make_drbg_test_data (NID_aes_192_ctr, 0, aes_192_no_df, 0),
- make_drbg_test_data (NID_aes_256_ctr, 0, aes_256_no_df, 1),
- make_drbg_test_data_df(NID_aes_128_ctr, aes_128_use_df, 0),
- make_drbg_test_data_df(NID_aes_192_ctr, aes_192_use_df, 0),
- make_drbg_test_data_df(NID_aes_256_ctr, aes_256_use_df, 1),
-};
+static int rand_bytes(unsigned char *buf, int num)
+{
+ return gen_bytes(RAND_get0_public(NULL), buf, num);
+}
+
+static int rand_priv_bytes(unsigned char *buf, int num)
+{
+ return gen_bytes(RAND_get0_private(NULL), buf, num);
+}
-static int app_data_index;
+
+/* size of random output generated in test_drbg_reseed() */
+#define RANDOM_SIZE 16
/*
- * Test context data, attached as EXDATA to the RAND_DRBG
+ * DRBG query functions
*/
-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)
+static int state(EVP_RAND_CTX *drbg)
+{
+ return EVP_RAND_get_state(drbg);
+}
+
+static unsigned int query_rand_uint(EVP_RAND_CTX *drbg, const char *name)
{
- TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
+ 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); \
+ }
+DRBG_UINT(reseed_counter)
- t->entropycnt++;
- *pout = (unsigned char *)t->entropy;
- return t->entropylen;
+static PROV_DRBG *prov_rand(EVP_RAND_CTX *drbg)
+{
+ return (PROV_DRBG *)drbg->algctx;
}
-static size_t kat_nonce(RAND_DRBG *drbg, unsigned char **pout,
- int entropy, size_t min_len, size_t max_len)
+static void set_reseed_counter(EVP_RAND_CTX *drbg, unsigned int n)
{
- TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
+ PROV_DRBG *p = prov_rand(drbg);
- t->noncecnt++;
- *pout = (unsigned char *)t->nonce;
- return t->noncelen;
+ p->reseed_counter = n;
}
-static int uninstantiate(RAND_DRBG *drbg)
+static void inc_reseed_counter(EVP_RAND_CTX *drbg)
{
- int ret = drbg == NULL ? 1 : RAND_DRBG_uninstantiate(drbg);
+ set_reseed_counter(drbg, reseed_counter(drbg) + 1);
+}
- ERR_clear_error();
- return ret;
+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;
}
/*
- * Do a single KAT test. Return 0 on failure.
+ * 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 single_kat(DRBG_SELFTEST_DATA *td)
+static int using_fips_rng(void)
{
- RAND_DRBG *drbg = NULL;
- TEST_CTX t;
- int failures = 0;
- unsigned char buff[1024];
+ EVP_RAND_CTX *primary = RAND_get0_primary(NULL);
+ const OSSL_PROVIDER *prov;
+ const char *name;
- /*
- * Test without PR: Instantiate DRBG with test entropy, nonce and
- * personalisation string.
- */
- if (!TEST_ptr(drbg = RAND_DRBG_new(td->nid, td->flags, NULL)))
+ if (!TEST_ptr(primary))
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)
- || !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);
+
+ 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;
+}
+
+ /*
+ * 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 disable_crngt(EVP_RAND_CTX *drbg)
+{
+ return 1;
+}
+
+/*
+ * 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 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
+ )
+{
+ 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;
/*
- * Now test with PR: Instantiate DRBG with test entropy, nonce and
- * personalisation string.
+ * step 1: check preconditions
*/
- 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++;
+
+ /* 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;
/*
- * Now generate with PR: we need to supply entropy as this will
- * perform a reseed operation.
+ * step 2: generate random output
*/
- 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++;
+
+ if (reseed_when == 0)
+ reseed_when = time(NULL);
+
+ /* 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);
+
/*
- * Now generate again with PR: supply new entropy again.
+ * step 3: check postconditions
*/
- 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++;
+ /* 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;
-err:
- uninstantiate(drbg);
- RAND_DRBG_free(drbg);
- return failures == 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;
+ }
+
+ 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;
+ }
+
+ 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;
+ }
+
+ 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;
+
+ /* 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();
+ }
+
+ return 1;
}
+
+#if defined(OPENSSL_SYS_UNIX) && !defined(OPENSSL_RAND_SEED_EGD)
+/* 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))
+
+typedef struct drbg_fork_result_st {
+
+ unsigned char random[RANDOM_SIZE]; /* random output */
+
+ 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;
+
/*
- * Initialise a DRBG based on selftest data
+ * 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 init(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td, TEST_CTX *t)
+static int compare_drbg_fork_result(const void *left, const void *right)
{
- 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;
+ int result;
+ const drbg_fork_result *l = left;
+ const drbg_fork_result *r = right;
+
+ /* separate public and private results */
+ result = l->private - r->private;
+
+ if (result == 0)
+ result = memcmp(l->random, r->random, RANDOM_SIZE);
+
+ if (result == 0)
+ result = l->pindex - r->pindex;
+
+ return result;
}
/*
- * Initialise and instantiate DRBG based on selftest data
+ * Sort two-byte chunks of random data
+ *
+ * Used for finding collisions in two-byte chunks
*/
-static int instantiate(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td,
- TEST_CTX *t)
+static int compare_rand_chunk(const void *left, const void *right)
{
- if (!TEST_true(init(drbg, td, t))
- || !TEST_true(RAND_DRBG_instantiate(drbg, td->pers, td->perslen)))
- return 0;
- return 1;
+ return memcmp(left, right, 2);
}
/*
- * Perform extensive error checking as required by SP800-90.
- * Induce several failure modes and check an error condition is set.
+ * 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 error_check(DRBG_SELFTEST_DATA *td)
+static int test_drbg_reseed_in_child(EVP_RAND_CTX *primary,
+ EVP_RAND_CTX *public,
+ EVP_RAND_CTX *private,
+ drbg_fork_result result[2])
{
- 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(0, 0, NULL)))
- goto err;
+ int rv = 0, status;
+ int fd[2];
+ pid_t pid;
+ unsigned char random[2 * RANDOM_SIZE];
- /*
- * Personalisation string tests
- */
+ if (!TEST_int_ge(pipe(fd), 0))
+ return 0;
- /* 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;
+ if (!TEST_int_ge(pid = fork(), 0)) {
+ close(fd[0]);
+ close(fd[1]);
+ return 0;
+ } else if (pid > 0) {
- /*
- * Entropy source tests
- */
+ /* I'm the parent; close the write end */
+ close(fd[1]);
- /* Test entropy source failure detecion: i.e. returns no data */
- t.entropylen = 0;
- if (TEST_int_le(RAND_DRBG_instantiate(drbg, td->pers, td->perslen), 0))
- goto err;
+ /* 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))) {
- /* 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;
+ /* random output of public drbg */
+ result[0].pid = pid;
+ result[0].private = 0;
+ memcpy(result[0].random, &random[0], RANDOM_SIZE);
- /* 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;
+ /* random output of private drbg */
+ result[1].pid = pid;
+ result[1].private = 1;
+ memcpy(result[1].random, &random[RANDOM_SIZE], RANDOM_SIZE);
- /* 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;
+ rv = 1;
+ }
- /*
- * Nonce tests
- */
+ /* close the read end */
+ close(fd[0]);
- /* 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;
+ return rv;
+
+ } else {
+
+ /* I'm the child; close the read end */
+ close(fd[0]);
+
+ /* 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))) {
+
+ rv = 1;
+ }
+
+ /* close the write end */
+ close(fd[1]);
+
+ /* convert boolean to exit code */
+ exit(rv == 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;
+static int test_rand_reseed_on_fork(EVP_RAND_CTX *primary,
+ EVP_RAND_CTX *public,
+ EVP_RAND_CTX *private)
+{
+ 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];
+
+ memset(&result, 0, sizeof(result));
+
+ for (i = 1 ; i <= DRBG_FORK_COUNT ; ++i) {
+
+ presult[0].pindex = presult[1].pindex = i;
+
+ sprintf(presult[0].name, "child %d", i);
+ strcpy(presult[1].name, presult[0].name);
+
+ /* collect the random output of the children */
+ if (!TEST_true(test_drbg_reseed_in_child(primary,
+ public,
+ private,
+ presult)))
+ return 0;
+
+ presult += 2;
}
- /* 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;
+ /* 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;
- /* 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;
+ strcpy(result[0].name, "parent");
+ strcpy(result[1].name, "parent");
- /* Try too large additional input */
- if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
- td->adin, drbg->max_adinlen + 1)))
- goto err;
+ /* output of public drbg */
+ result[0].pid = pid;
+ result[0].private = 0;
+ memcpy(result[0].random, &random[0], RANDOM_SIZE);
+
+ /* 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;
+ }
+
+ /* sort the results... */
+ qsort(result, DRBG_FORK_RESULT_COUNT, sizeof(drbg_fork_result),
+ compare_drbg_fork_result);
+
+ /* ...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 (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 (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;
+ }
+
+ 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 (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;
+ }
+
+ if (verbose || !success) {
+
+ 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 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
+ * as designed.
+ */
+static int test_rand_reseed(void)
+{
+ EVP_RAND_CTX *primary, *public, *private;
+ unsigned char rand_add_buf[256];
+ 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(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 primary */
+ if (!TEST_ptr_ne(public, private)
+ || !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 primary DRBG */
+ if (!TEST_true(disable_crngt(primary)))
+ return 0;
+
+ /* uninstantiate the three global DRBGs */
+ EVP_RAND_uninstantiate(primary);
+ EVP_RAND_uninstantiate(private);
+ EVP_RAND_uninstantiate(public);
/*
- * Check prediction resistance request fails if entropy source
- * failure.
+ * Test initial seeding of shared DRBGs
*/
- t.entropylen = 0;
- if (TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 1,
- td->adin, td->adinlen))
- || !uninstantiate(drbg))
- goto err;
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 1, 1, 1, 0)))
+ goto error;
- /* Instantiate again with valid data */
- if (!instantiate(drbg, td, &t))
- goto err;
- reseed_counter_tmp = drbg->reseed_counter;
- drbg->reseed_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_counter, reseed_counter_tmp + 1)
- || !uninstantiate(drbg))
- goto err;
+ /*
+ * Test initial state of shared DRBGs
+ */
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 0, 0, 0, 0)))
+ goto error;
/*
- * Check prediction resistance request fails if entropy source
- * failure.
+ * Test whether the public and private DRBG are both reseeded when their
+ * reseed counters differ from the primary's reseed counter.
*/
- t.entropylen = 0;
- if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 1,
- td->adin, td->adinlen))
- || !uninstantiate(drbg))
- goto err;
+ inc_reseed_counter(primary);
+ if (!TEST_true(test_drbg_reseed(1,
+ primary, public, private,
+ NULL, NULL,
+ 0, 1, 1, 0)))
+ goto error;
- /* Test reseed counter works */
- if (!instantiate(drbg, td, &t))
- goto err;
- reseed_counter_tmp = drbg->reseed_counter;
- drbg->reseed_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_counter, reseed_counter_tmp + 1)
- || !uninstantiate(drbg))
- goto err;
+ /*
+ * Test whether the public DRBG is reseeded when its reseed counter differs
+ * from the primary's reseed counter.
+ */
+ 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;
/*
- * Explicit reseed tests
+ * Test whether the private DRBG is reseeded when its reseed counter differs
+ * from the primary's reseed counter.
*/
+ 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;
- /* Test explicit reseed with too large additional input */
- if (!init(drbg, td, &t)
- || RAND_DRBG_reseed(drbg, td->adin, drbg->max_adinlen + 1) > 0)
- goto err;
+ /* fill 'randomness' buffer with some arbitrary data */
+ memset(rand_add_buf, 'r', sizeof(rand_add_buf));
- /* Test explicit reseed with entropy source failure */
- t.entropylen = 0;
- if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen), 0)
- || !uninstantiate(drbg))
- goto err;
+ /*
+ * 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 primary DRBG gets already reseeded
+ * in RAND_add(), whence the check for the condition
+ * 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,
+ primary, public, private,
+ NULL, NULL,
+ 1, 1, 1,
+ before_reseed)))
+ goto error;
- /* Test explicit reseed with too much entropy */
- if (!init(drbg, td, &t))
- goto err;
- t.entropylen = drbg->max_entropylen + 1;
- if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen), 0)
- || !uninstantiate(drbg))
- goto err;
+ rv = 1;
- /* Test explicit reseed with too little entropy */
- if (!init(drbg, td, &t))
- goto err;
- t.entropylen = drbg->min_entropylen - 1;
- if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen), 0)
- || !uninstantiate(drbg))
- goto err;
+error:
+ return rv;
+}
- /* Standard says we have to check uninstantiate really zeroes */
- if (!TEST_mem_eq(zero, sizeof(drbg->ctr), &drbg->ctr, sizeof(drbg->ctr)))
- goto err;
+#if defined(OPENSSL_THREADS)
+static int multi_thread_rand_bytes_succeeded = 1;
+static int multi_thread_rand_priv_bytes_succeeded = 1;
- ret = 1;
+static int set_reseed_time_interval(EVP_RAND_CTX *drbg, int t)
+{
+ OSSL_PARAM params[2];
-err:
- uninstantiate(drbg);
- RAND_DRBG_free(drbg);
- return ret;
+ 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 int test_kats(int i)
+static void run_multi_thread_test(void)
{
- DRBG_SELFTEST_DATA *td = &drbg_test[i];
- int rv = 0;
+ unsigned char buf[256];
+ time_t start = time(NULL);
+ EVP_RAND_CTX *public = NULL, *private = NULL;
+
+ 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;
+ }
- if (!single_kat(td))
- goto err;
- rv = 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);
+}
-err:
- return rv;
+# 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 test_error_checks(int i)
+static int run_thread(thread_t *t)
{
- DRBG_SELFTEST_DATA *td = &drbg_test[i];
- int rv = 0;
+ *t = CreateThread(NULL, 0, thread_run, NULL, 0, NULL);
+ return *t != NULL;
+}
- if (error_check(td))
- goto err;
- rv = 1;
+static int wait_for_thread(thread_t thread)
+{
+ return WaitForSingleObject(thread, INFINITE) == 0;
+}
-err:
- return rv;
+# 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;
}
-#define RAND_ADD_SIZE 500
+static int run_thread(thread_t *t)
+{
+ return pthread_create(t, NULL, thread_run, NULL) == 0;
+}
-static int test_rand_add(void)
+static int wait_for_thread(thread_t thread)
{
- char *p;
+ return pthread_join(thread, NULL) == 0;
+}
- if (!TEST_ptr(p = calloc(RAND_ADD_SIZE, 1)))
+# 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;
- RAND_add(p, RAND_ADD_SIZE, RAND_ADD_SIZE);
- free(p);
+
return 1;
}
+#endif
+static EVP_RAND_CTX *new_drbg(EVP_RAND_CTX *parent)
+{
+ OSSL_PARAM params[2];
+ EVP_RAND *rand = NULL;
+ EVP_RAND_CTX *drbg = NULL;
+
+ params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DRBG_PARAM_CIPHER,
+ "AES-256-CTR", 0);
+ params[1] = OSSL_PARAM_construct_end();
+
+ 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;
+ }
+ EVP_RAND_free(rand);
+ return drbg;
+}
-int setup_tests(void)
+static int test_rand_prediction_resistance(void)
{
- app_data_index = RAND_DRBG_get_ex_new_index(0L, NULL, NULL, NULL, NULL);
+ EVP_RAND_CTX *x = NULL, *y = NULL, *z = NULL;
+ unsigned char buf1[51], buf2[sizeof(buf1)];
+ 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(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;
- ADD_ALL_TESTS(test_kats, OSSL_NELEM(drbg_test));
- ADD_ALL_TESTS(test_error_checks, OSSL_NELEM(drbg_test));
- ADD_TEST(test_rand_add);
+ /*
+ * 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 primary, so that the entire DRBG chain reseeds.
+ */
+ 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 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 primary, reseeding the entire DRBG chain.
+ */
+ 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 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:
+ EVP_RAND_CTX_free(z);
+ EVP_RAND_CTX_free(y);
+ EVP_RAND_CTX_free(x);
+ return ret;
+}
+
+int setup_tests(void)
+{
+ ADD_TEST(test_rand_reseed);
+#if defined(OPENSSL_SYS_UNIX) && !defined(OPENSSL_RAND_SEED_EGD)
+ 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
return 1;
}
projects / openssl.git / blobdiff