int main(int argc, char **argv) { #if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX) char *p = NULL, *q = NULL; if (!CRYPTO_secure_malloc_init(4096, 32)) { perror("failed"); return 1; } p = OPENSSL_secure_malloc(20); if (!CRYPTO_secure_allocated(p)) { perror("failed 1"); return 1; } q = OPENSSL_malloc(20); if (CRYPTO_secure_allocated(q)) { perror("failed 1"); return 1; } OPENSSL_secure_free(p); OPENSSL_free(q); CRYPTO_secure_malloc_done(); #else /* Should fail. */ if (CRYPTO_secure_malloc_init(4096, 32)) { perror("failed"); return 1; } #endif return 0; }
/* * Allocate memory and initialize a new DRBG. The DRBG is allocated on * the secure heap if |secure| is nonzero and the secure heap is enabled. * The |parent|, if not NULL, will be used as random source for reseeding. * * Returns a pointer to the new DRBG instance on success, NULL on failure. */ static RAND_DRBG *rand_drbg_new(int secure, int type, unsigned int flags, RAND_DRBG *parent) { RAND_DRBG *drbg = secure ? OPENSSL_secure_zalloc(sizeof(*drbg)) : OPENSSL_zalloc(sizeof(*drbg)); if (drbg == NULL) { RANDerr(RAND_F_RAND_DRBG_NEW, ERR_R_MALLOC_FAILURE); return NULL; } drbg->secure = secure && CRYPTO_secure_allocated(drbg); drbg->fork_count = rand_fork_count; drbg->parent = parent; if (parent == NULL) { drbg->reseed_interval = master_reseed_interval; drbg->reseed_time_interval = master_reseed_time_interval; } else { drbg->reseed_interval = slave_reseed_interval; drbg->reseed_time_interval = slave_reseed_time_interval; } if (RAND_DRBG_set(drbg, type, flags) == 0) goto err; if (parent != NULL) { rand_drbg_lock(parent); if (drbg->strength > parent->strength) { /* * We currently don't support the algorithm from NIST SP 800-90C * 10.1.2 to use a weaker DRBG as source */ rand_drbg_unlock(parent); RANDerr(RAND_F_RAND_DRBG_NEW, RAND_R_PARENT_STRENGTH_TOO_WEAK); goto err; } rand_drbg_unlock(parent); } if (!RAND_DRBG_set_callbacks(drbg, rand_drbg_get_entropy, rand_drbg_cleanup_entropy, NULL, NULL)) goto err; return drbg; err: if (drbg->secure) OPENSSL_secure_free(drbg); else OPENSSL_free(drbg); return NULL; }
static int test_sec_mem_clear(void) { #if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX) const int size = 64; unsigned char *p = NULL; int i, res = 0; if (!TEST_true(CRYPTO_secure_malloc_init(4096, 32)) || !TEST_ptr(p = OPENSSL_secure_malloc(size))) goto err; for (i = 0; i < size; i++) if (!TEST_uchar_eq(p[i], 0)) goto err; for (i = 0; i < size; i++) p[i] = (unsigned char)(i + ' ' + 1); OPENSSL_secure_free(p); /* * A deliberate use after free here to verify that the memory has been * cleared properly. Since secure free doesn't return the memory to * libc's memory pool, it technically isn't freed. However, the header * bytes have to be skipped and these consist of two pointers in the * current implementation. */ for (i = sizeof(void *) * 2; i < size; i++) if (!TEST_uchar_eq(p[i], 0)) return 0; res = 1; p = NULL; err: OPENSSL_secure_free(p); CRYPTO_secure_malloc_done(); return res; #else return 1; #endif }
/* Allocate a block of secure memory; copy over old data if there * was any, and then free it. */ static char *sec_alloc_realloc(BUF_MEM *str, size_t len) { char *ret; ret = OPENSSL_secure_malloc(len); if (str->data != NULL) { if (ret != NULL) memcpy(ret, str->data, str->length); OPENSSL_secure_free(str->data); } return (ret); }
void BUF_MEM_free(BUF_MEM *a) { if (a == NULL) return; if (a->data != NULL) { if (a->flags & BUF_MEM_FLAG_SECURE) OPENSSL_secure_free(a->data); else OPENSSL_clear_free(a->data, a->max); } OPENSSL_free(a); }
static int test_sec_mem(void) { #if defined(OPENSSL_SYS_LINUX) || defined(OPENSSL_SYS_UNIX) int testresult = 0; char *p = NULL, *q = NULL, *r = NULL, *s = NULL; s = OPENSSL_secure_malloc(20); /* s = non-secure 20 */ if (!TEST_ptr(s) || !TEST_false(CRYPTO_secure_allocated(s))) goto end; r = OPENSSL_secure_malloc(20); /* r = non-secure 20, s = non-secure 20 */ if (!TEST_ptr(r) || !TEST_true(CRYPTO_secure_malloc_init(4096, 32)) || !TEST_false(CRYPTO_secure_allocated(r))) goto end; p = OPENSSL_secure_malloc(20); if (!TEST_ptr(p) /* r = non-secure 20, p = secure 20, s = non-secure 20 */ || !TEST_true(CRYPTO_secure_allocated(p)) /* 20 secure -> 32-byte minimum allocation unit */ || !TEST_size_t_eq(CRYPTO_secure_used(), 32)) goto end; q = OPENSSL_malloc(20); if (!TEST_ptr(q)) goto end; /* r = non-secure 20, p = secure 20, q = non-secure 20, s = non-secure 20 */ if (!TEST_false(CRYPTO_secure_allocated(q))) goto end; OPENSSL_secure_clear_free(s, 20); s = OPENSSL_secure_malloc(20); if (!TEST_ptr(s) /* r = non-secure 20, p = secure 20, q = non-secure 20, s = secure 20 */ || !TEST_true(CRYPTO_secure_allocated(s)) /* 2 * 20 secure -> 64 bytes allocated */ || !TEST_size_t_eq(CRYPTO_secure_used(), 64)) goto end; OPENSSL_secure_clear_free(p, 20); p = NULL; /* 20 secure -> 32 bytes allocated */ if (!TEST_size_t_eq(CRYPTO_secure_used(), 32)) goto end; OPENSSL_free(q); q = NULL; /* should not complete, as secure memory is still allocated */ if (!TEST_false(CRYPTO_secure_malloc_done()) || !TEST_true(CRYPTO_secure_malloc_initialized())) goto end; OPENSSL_secure_free(s); s = NULL; /* secure memory should now be 0, so done should complete */ if (!TEST_size_t_eq(CRYPTO_secure_used(), 0) || !TEST_true(CRYPTO_secure_malloc_done()) || !TEST_false(CRYPTO_secure_malloc_initialized())) goto end; TEST_info("Possible infinite loop: allocate more than available"); if (!TEST_true(CRYPTO_secure_malloc_init(32768, 16))) goto end; TEST_ptr_null(OPENSSL_secure_malloc((size_t)-1)); TEST_true(CRYPTO_secure_malloc_done()); /* * If init fails, then initialized should be false, if not, this * could cause an infinite loop secure_malloc, but we don't test it */ if (TEST_false(CRYPTO_secure_malloc_init(16, 16)) && !TEST_false(CRYPTO_secure_malloc_initialized())) { TEST_true(CRYPTO_secure_malloc_done()); goto end; } /*- * There was also a possible infinite loop when the number of * elements was 1<<31, as |int i| was set to that, which is a * negative number. However, it requires minimum input values: * * CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4); * * Which really only works on 64-bit systems, since it took 16 GB * secure memory arena to trigger the problem. It naturally takes * corresponding amount of available virtual and physical memory * for test to be feasible/representative. Since we can't assume * that every system is equipped with that much memory, the test * remains disabled. If the reader of this comment really wants * to make sure that infinite loop is fixed, they can enable the * code below. */ # if 0 /*- * On Linux and BSD this test has a chance to complete in minimal * time and with minimum side effects, because mlock is likely to * fail because of RLIMIT_MEMLOCK, which is customarily [much] * smaller than 16GB. In other words Linux and BSD users can be * limited by virtual space alone... */ if (sizeof(size_t) > 4) { TEST_info("Possible infinite loop: 1<<31 limit"); if (TEST_true(CRYPTO_secure_malloc_init((size_t)1<<34, (size_t)1<<4) != 0)) TEST_true(CRYPTO_secure_malloc_done()); } # endif /* this can complete - it was not really secure */ testresult = 1; end: OPENSSL_secure_free(p); OPENSSL_free(q); OPENSSL_secure_free(r); OPENSSL_secure_free(s); return testresult; #else /* Should fail. */ return TEST_false(CRYPTO_secure_malloc_init(4096, 32)); #endif }
/* Setup EVP_PKEY using public, private or generation */ static int ecx_key_op(EVP_PKEY *pkey, int id, const X509_ALGOR *palg, const unsigned char *p, int plen, ecx_key_op_t op) { ECX_KEY *key = NULL; unsigned char *privkey, *pubkey; if (op != KEY_OP_KEYGEN) { if (palg != NULL) { int ptype; /* Algorithm parameters must be absent */ X509_ALGOR_get0(NULL, &ptype, NULL, palg); if (ptype != V_ASN1_UNDEF) { ECerr(EC_F_ECX_KEY_OP, EC_R_INVALID_ENCODING); return 0; } } if (p == NULL || plen != KEYLENID(id)) { ECerr(EC_F_ECX_KEY_OP, EC_R_INVALID_ENCODING); return 0; } } key = OPENSSL_zalloc(sizeof(*key)); if (key == NULL) { ECerr(EC_F_ECX_KEY_OP, ERR_R_MALLOC_FAILURE); return 0; } pubkey = key->pubkey; if (op == KEY_OP_PUBLIC) { memcpy(pubkey, p, plen); } else { privkey = key->privkey = OPENSSL_secure_malloc(KEYLENID(id)); if (privkey == NULL) { ECerr(EC_F_ECX_KEY_OP, ERR_R_MALLOC_FAILURE); goto err; } if (op == KEY_OP_KEYGEN) { if (RAND_priv_bytes(privkey, KEYLENID(id)) <= 0) { OPENSSL_secure_free(privkey); key->privkey = NULL; goto err; } if (id == EVP_PKEY_X25519) { privkey[0] &= 248; privkey[X25519_KEYLEN - 1] &= 127; privkey[X25519_KEYLEN - 1] |= 64; } else if (id == EVP_PKEY_X448) { privkey[0] &= 252; privkey[X448_KEYLEN - 1] |= 128; } } else { memcpy(privkey, p, KEYLENID(id)); } switch (id) { case EVP_PKEY_X25519: X25519_public_from_private(pubkey, privkey); break; case EVP_PKEY_ED25519: ED25519_public_from_private(pubkey, privkey); break; case EVP_PKEY_X448: X448_public_from_private(pubkey, privkey); break; case EVP_PKEY_ED448: ED448_public_from_private(pubkey, privkey); break; } } EVP_PKEY_assign(pkey, id, key); return 1; err: OPENSSL_free(key); return 0; }
/* * Allocate memory and initialize a new DRBG. The DRBG is allocated on * the secure heap if |secure| is nonzero and the secure heap is enabled. * The |parent|, if not NULL, will be used as random source for reseeding. * * Returns a pointer to the new DRBG instance on success, NULL on failure. */ static RAND_DRBG *rand_drbg_new(int secure, int type, unsigned int flags, RAND_DRBG *parent) { RAND_DRBG *drbg = secure ? OPENSSL_secure_zalloc(sizeof(*drbg)) : OPENSSL_zalloc(sizeof(*drbg)); if (drbg == NULL) { RANDerr(RAND_F_RAND_DRBG_NEW, ERR_R_MALLOC_FAILURE); return NULL; } drbg->secure = secure && CRYPTO_secure_allocated(drbg); drbg->fork_count = rand_fork_count; drbg->parent = parent; if (parent == NULL) { drbg->get_entropy = rand_drbg_get_entropy; drbg->cleanup_entropy = rand_drbg_cleanup_entropy; #ifndef RAND_DRBG_GET_RANDOM_NONCE drbg->get_nonce = rand_drbg_get_nonce; drbg->cleanup_nonce = rand_drbg_cleanup_nonce; #endif drbg->reseed_interval = master_reseed_interval; drbg->reseed_time_interval = master_reseed_time_interval; } else { drbg->get_entropy = rand_drbg_get_entropy; drbg->cleanup_entropy = rand_drbg_cleanup_entropy; /* * Do not provide nonce callbacks, the child DRBGs will * obtain their nonce using random bits from the parent. */ drbg->reseed_interval = slave_reseed_interval; drbg->reseed_time_interval = slave_reseed_time_interval; } if (RAND_DRBG_set(drbg, type, flags) == 0) goto err; if (parent != NULL) { rand_drbg_lock(parent); if (drbg->strength > parent->strength) { /* * We currently don't support the algorithm from NIST SP 800-90C * 10.1.2 to use a weaker DRBG as source */ rand_drbg_unlock(parent); RANDerr(RAND_F_RAND_DRBG_NEW, RAND_R_PARENT_STRENGTH_TOO_WEAK); goto err; } rand_drbg_unlock(parent); } return drbg; err: if (drbg->secure) OPENSSL_secure_free(drbg); else OPENSSL_free(drbg); return NULL; }
static void x25519_keyfinish(EC_KEY *eckey) { OPENSSL_secure_free(eckey->custom_data); eckey->custom_data = NULL; }