diff options
author | Pauli <pauli@openssl.org> | 2021-10-28 09:21:40 +1000 |
---|---|---|
committer | Pauli <pauli@openssl.org> | 2021-11-12 19:49:46 +1000 |
commit | bc4efcb0d0740467f1b8b536677a2886c2445c80 (patch) | |
tree | c2af1ff5a0e91430bc4f277b2158d45d532f0b88 /test/safe_math_test.c | |
parent | cccfc668286cc1010911c28ea1e76be7e1eac3e7 (diff) | |
download | openssl-bc4efcb0d0740467f1b8b536677a2886c2445c80.zip openssl-bc4efcb0d0740467f1b8b536677a2886c2445c80.tar.gz openssl-bc4efcb0d0740467f1b8b536677a2886c2445c80.tar.bz2 |
test: add unit tests for integer overflow helpers
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/16930)
Diffstat (limited to 'test/safe_math_test.c')
-rw-r--r-- | test/safe_math_test.c | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/test/safe_math_test.c b/test/safe_math_test.c new file mode 100644 index 0000000..da50ec8 --- /dev/null +++ b/test/safe_math_test.c @@ -0,0 +1,340 @@ +/* + * Copyright 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 + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <stdlib.h> + +/* + * Uncomment this if the fallback non-builtin overflow checking is to + * be tested. + */ +/*#define OPENSSL_NO_BUILTIN_OVERFLOW_CHECKING*/ + +#include "internal/nelem.h" +#include "internal/safe_math.h" +#include "testutil.h" + +/* Create the safe math instances we're interested in */ +OSSL_SAFE_MATH_SIGNED(int, int) +OSSL_SAFE_MATH_UNSIGNED(uint, unsigned int) +OSSL_SAFE_MATH_UNSIGNED(size_t, size_t) + +static const struct { + int a, b; + int sum_err, sub_err, mul_err, div_err, mod_err, neg_a_err, neg_b_err; + int abs_a_err, abs_b_err; +} test_ints[] = { + { 1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + { -1, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + { 1, -3, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + { -1, -3, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, + { INT_MAX, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 }, + { INT_MAX, 2, 1, 0, 1, 0, 0, 0, 0, 0, 0 }, + { INT_MIN, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0 }, + { 1, INT_MIN, 0, 1, 0, 0, 0, 0, 1, 0, 1 }, + { INT_MIN, 2, 0, 1, 1, 0, 0, 1, 0, 1, 0 }, + { 2, INT_MIN, 0, 1, 1, 0, 0, 0, 1, 0, 1 }, + { INT_MIN, -1, 1, 0, 1, 1, 1, 1, 0, 1, 0 }, + { INT_MAX, INT_MIN, 0, 1, 1, 0, 0, 0, 1, 0, 1 }, + { INT_MIN, INT_MAX, 0, 1, 1, 0, 0, 1, 0, 1, 0 }, + { 3, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 }, +}; + +static int test_int_ops(int n) +{ + int err, r; + const int a = test_ints[n].a, b = test_ints[n].b; + + err = 0; + r = safe_add_int(a, b, &err); + if (!TEST_int_eq(err, test_ints[n].sum_err) + || (!err && !TEST_int_eq(r, a + b))) + goto err; + + err = 0; + r = safe_sub_int(a, b, &err); + if (!TEST_int_eq(err, test_ints[n].sub_err) + || (!err && !TEST_int_eq(r, a - b))) + goto err; + + err = 0; + r = safe_mul_int(a, b, &err); + if (!TEST_int_eq(err, test_ints[n].mul_err) + || (!err && !TEST_int_eq(r, a * b))) + goto err; + + err = 0; + r = safe_div_int(a, b, &err); + if (!TEST_int_eq(err, test_ints[n].div_err) + || (!err && !TEST_int_eq(r, a / b))) + goto err; + + err = 0; + r = safe_mod_int(a, b, &err); + if (!TEST_int_eq(err, test_ints[n].mod_err) + || (!err && !TEST_int_eq(r, a % b))) + goto err; + + err = 0; + r = safe_neg_int(a, &err); + if (!TEST_int_eq(err, test_ints[n].neg_a_err) + || (!err && !TEST_int_eq(r, -a))) + goto err; + + err = 0; + r = safe_neg_int(b, &err); + if (!TEST_int_eq(err, test_ints[n].neg_b_err) + || (!err && !TEST_int_eq(r, -b))) + goto err; + + err = 0; + r = safe_abs_int(a, &err); + if (!TEST_int_eq(err, test_ints[n].abs_a_err) + || (!err && !TEST_int_eq(r, a < 0 ? -a : a))) + goto err; + + err = 0; + r = safe_abs_int(b, &err); + if (!TEST_int_eq(err, test_ints[n].abs_b_err) + || (!err && !TEST_int_eq(r, b < 0 ? -b : b))) + goto err; + return 1; + err: + TEST_info("a = %d b = %d r = %d err = %d", a, b, r, err); + return 0; +} + +static const struct { + unsigned int a, b; + int sum_err, sub_err, mul_err, div_err, mod_err; +} test_uints[] = { + { 3, 1, 0, 0, 0, 0, 0 }, + { 1, 3, 0, 1, 0, 0, 0 }, + { UINT_MAX, 1, 1, 0, 0, 0, 0 }, + { UINT_MAX, 2, 1, 0, 1, 0, 0 }, + { 1, UINT_MAX, 1, 1, 0, 0, 0 }, + { 2, UINT_MAX, 1, 1, 1, 0, 0 }, + { UINT_MAX, 0, 0, 0, 0, 1, 1 }, +}; + +static int test_uint_ops(int n) +{ + int err; + unsigned int r; + const unsigned int a = test_uints[n].a, b = test_uints[n].b; + + err = 0; + r = safe_add_uint(a, b, &err); + if (!TEST_int_eq(err, test_uints[n].sum_err) + || (!err && !TEST_uint_eq(r, a + b))) + goto err; + + err = 0; + r = safe_sub_uint(a, b, &err); + if (!TEST_int_eq(err, test_uints[n].sub_err) + || (!err && !TEST_uint_eq(r, a - b))) + goto err; + + err = 0; + r = safe_mul_uint(a, b, &err); + if (!TEST_int_eq(err, test_uints[n].mul_err) + || (!err && !TEST_uint_eq(r, a * b))) + goto err; + + err = 0; + r = safe_div_uint(a, b, &err); + if (!TEST_int_eq(err, test_uints[n].div_err) + || (!err && !TEST_uint_eq(r, a / b))) + goto err; + + err = 0; + r = safe_mod_uint(a, b, &err); + if (!TEST_int_eq(err, test_uints[n].mod_err) + || (!err && !TEST_uint_eq(r, a % b))) + goto err; + + err = 0; + r = safe_neg_uint(a, &err); + if (!TEST_int_eq(err, a != 0) || (!err && !TEST_uint_eq(r, 0))) + goto err; + + err = 0; + r = safe_neg_uint(b, &err); + if (!TEST_int_eq(err, b != 0) || (!err && !TEST_uint_eq(r, 0))) + goto err; + + err = 0; + r = safe_abs_uint(a, &err); + if (!TEST_int_eq(err, 0) || !TEST_uint_eq(r, a)) + goto err; + + err = 0; + r = safe_abs_uint(b, &err); + if (!TEST_int_eq(err, 0) || !TEST_uint_eq(r, b)) + goto err; + return 1; + err: + TEST_info("a = %u b = %u r = %u err = %d", a, b, r, err); + return 0; +} + +static const struct { + size_t a, b; + int sum_err, sub_err, mul_err, div_err, mod_err; +} test_size_ts[] = { + { 3, 1, 0, 0, 0, 0, 0 }, + { 1, 3, 0, 1, 0, 0, 0 }, + { SIZE_MAX, 1, 1, 0, 0, 0, 0 }, + { SIZE_MAX, 2, 1, 0, 1, 0, 0 }, + { 1, SIZE_MAX, 1, 1, 0, 0, 0 }, + { 2, SIZE_MAX, 1, 1, 1, 0, 0 }, + { 11, 0, 0, 0, 0, 1, 1 }, +}; + +static int test_size_t_ops(int n) +{ + int err; + size_t r; + const size_t a = test_size_ts[n].a, b = test_size_ts[n].b; + + err = 0; + r = safe_add_size_t(a, b, &err); + if (!TEST_int_eq(err, test_size_ts[n].sum_err) + || (!err && !TEST_size_t_eq(r, a + b))) + goto err; + + err = 0; + r = safe_sub_size_t(a, b, &err); + if (!TEST_int_eq(err, test_size_ts[n].sub_err) + || (!err && !TEST_size_t_eq(r, a - b))) + goto err; + + err = 0; + r = safe_mul_size_t(a, b, &err); + if (!TEST_int_eq(err, test_size_ts[n].mul_err) + || (!err && !TEST_size_t_eq(r, a * b))) + goto err; + + err = 0; + r = safe_div_size_t(a, b, &err); + if (!TEST_int_eq(err, test_uints[n].div_err) + || (!err && !TEST_size_t_eq(r, a / b))) + goto err; + + err = 0; + r = safe_mod_size_t(a, b, &err); + if (!TEST_int_eq(err, test_size_ts[n].mod_err) + || (!err && !TEST_size_t_eq(r, a % b))) + goto err; + + err = 0; + r = safe_neg_size_t(a, &err); + if (!TEST_int_eq(err, a != 0) || (!err && !TEST_size_t_eq(r, 0))) + goto err; + + err = 0; + r = safe_neg_size_t(b, &err); + if (!TEST_int_eq(err, b != 0) || (!err && !TEST_size_t_eq(r, 0))) + goto err; + + err = 0; + r = safe_abs_size_t(a, &err); + if (!TEST_int_eq(err, 0) || !TEST_size_t_eq(r, a)) + goto err; + + err = 0; + r = safe_abs_size_t(b, &err); + if (!TEST_int_eq(err, 0) || !TEST_size_t_eq(r, b)) + goto err; + return 1; + err: + TEST_info("a = %zu b = %zu r = %zu err = %d", a, b, r, err); + return 0; +} + +static const struct { + int a, b, c; + int err; +} test_muldiv_ints[] = { + { 3, 1, 2, 0 }, + { 1, 3, 2, 0 }, + { -3, 1, 2, 0 }, + { 1, 3, -2, 0 }, + { INT_MAX, INT_MAX, INT_MAX, 0 }, + { INT_MIN, INT_MIN, INT_MAX, 1 }, + { INT_MIN, INT_MIN, INT_MIN, 0 }, + { INT_MAX, 2, 4, 0 }, + { 8, INT_MAX, 4, 1 }, + { INT_MAX, 8, 4, 1 }, + { INT_MIN, 2, 4, 1 }, + { 8, INT_MIN, 4, 1 }, + { INT_MIN, 8, 4, 1 }, + { 3, 4, 0, 1 }, +}; + +static int test_int_muldiv(int n) +{ + int err = 0; + int r, real = 0; + const int a = test_muldiv_ints[n].a; + const int b = test_muldiv_ints[n].b; + const int c = test_muldiv_ints[n].c; + + r = safe_muldiv_int(a, b, c, &err); + if (c != 0) + real = (int)((int64_t)a * (int64_t)b / (int64_t)c); + if (!TEST_int_eq(err, test_muldiv_ints[n].err) + || (!err && !TEST_int_eq(r, real))) { + TEST_info("%d * %d / %d r = %d err = %d", a, b, c, r, err); + return 0; + } + return 1; +} + +static const struct { + unsigned int a, b, c; + int err; +} test_muldiv_uints[] = { + { 3, 1, 2, 0 }, + { 1, 3, 2, 0 }, + { UINT_MAX, UINT_MAX, UINT_MAX, 0 }, + { UINT_MAX, 2, 4, 0 }, + { 8, UINT_MAX, 4, 1 }, + { UINT_MAX, 8, 4, 1 }, + { 3, 4, 0, 1 }, +}; + +static int test_uint_muldiv(int n) +{ + int err = 0; + unsigned int r, real = 0; + const unsigned int a = test_muldiv_uints[n].a; + const unsigned int b = test_muldiv_uints[n].b; + const unsigned int c = test_muldiv_uints[n].c; + + r = safe_muldiv_uint(a, b, c, &err); + if (c != 0) + real = (unsigned int)((uint64_t)a * (uint64_t)b / (uint64_t)c); + if (!TEST_int_eq(err, test_muldiv_uints[n].err) + || (!err && !TEST_uint_eq(r, real))) { + TEST_info("%u * %u / %u r = %u err = %d", a, b, c, r, err); + return 0; + } + return 1; +} + +int setup_tests(void) +{ + ADD_ALL_TESTS(test_int_ops, OSSL_NELEM(test_ints)); + ADD_ALL_TESTS(test_uint_ops, OSSL_NELEM(test_uints)); + ADD_ALL_TESTS(test_size_t_ops, OSSL_NELEM(test_size_ts)); + ADD_ALL_TESTS(test_int_muldiv, OSSL_NELEM(test_muldiv_ints)); + ADD_ALL_TESTS(test_uint_muldiv, OSSL_NELEM(test_muldiv_uints)); + return 1; +} |