/* crypto/constant_time_test.c */
-/*
+/*-
* Utilities for constant-time cryptography.
*
* Author: Emilia Kasper (emilia@openssl.org)
#include <stdio.h>
#include <stdlib.h>
-static const unsigned int CONSTTIME_TRUE = ~0;
+static const unsigned int CONSTTIME_TRUE = (unsigned)(~0);
static const unsigned int CONSTTIME_FALSE = 0;
-static const unsigned char CONSTTIME_TRUE_8 = ~0;
+static const unsigned char CONSTTIME_TRUE_8 = 0xff;
static const unsigned char CONSTTIME_FALSE_8 = 0;
-static int test_binary_op(unsigned int (*op)(unsigned int a, unsigned int b),
- const char* op_name, unsigned int a, unsigned int b, int is_true)
- {
- unsigned c = op(a, b);
- if (is_true && c != CONSTTIME_TRUE)
- {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
- "(TRUE), got %du\n", op_name, a, b, CONSTTIME_TRUE, c);
- return 1;
- }
- else if (!is_true && c != CONSTTIME_FALSE)
- {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
- "(FALSE), got %du\n", op_name, a, b, CONSTTIME_FALSE,
- c);
- return 1;
- }
- return 0;
- }
-
-static int test_binary_op_8(unsigned char (*op)(unsigned int a, unsigned int b),
- const char* op_name, unsigned int a, unsigned int b, int is_true)
- {
- unsigned char c = op(a, b);
- if (is_true && c != CONSTTIME_TRUE_8)
- {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
- "(TRUE), got %u\n", op_name, a, b, CONSTTIME_TRUE_8, c);
- return 1;
- }
- else if (!is_true && c != CONSTTIME_FALSE_8)
- {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
- "(FALSE), got %u\n", op_name, a, b, CONSTTIME_FALSE_8,
- c);
- return 1;
- }
- return 0;
- }
+static int test_binary_op(unsigned int (*op) (unsigned int a, unsigned int b),
+ const char *op_name, unsigned int a, unsigned int b,
+ int is_true)
+{
+ unsigned c = op(a, b);
+ if (is_true && c != CONSTTIME_TRUE) {
+ fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
+ "(TRUE), got %du\n", op_name, a, b, CONSTTIME_TRUE, c);
+ return 1;
+ } else if (!is_true && c != CONSTTIME_FALSE) {
+ fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
+ "(FALSE), got %du\n", op_name, a, b, CONSTTIME_FALSE, c);
+ return 1;
+ }
+ return 0;
+}
+
+static int test_binary_op_8(unsigned
+ char (*op) (unsigned int a, unsigned int b),
+ const char *op_name, unsigned int a,
+ unsigned int b, int is_true)
+{
+ unsigned char c = op(a, b);
+ if (is_true && c != CONSTTIME_TRUE_8) {
+ fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
+ "(TRUE), got %u\n", op_name, a, b, CONSTTIME_TRUE_8, c);
+ return 1;
+ } else if (!is_true && c != CONSTTIME_FALSE_8) {
+ fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
+ "(FALSE), got %u\n", op_name, a, b, CONSTTIME_FALSE_8, c);
+ return 1;
+ }
+ return 0;
+}
static int test_is_zero(unsigned int a)
- {
- unsigned int c = constant_time_is_zero(a);
- if (a == 0 && c != CONSTTIME_TRUE)
- {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %du (TRUE), got %du\n", a, CONSTTIME_TRUE, c);
- return 1;
- }
- else if (a != 0 && c != CONSTTIME_FALSE)
- {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %du (FALSE), got %du\n", a, CONSTTIME_FALSE,
- c);
- return 1;
- }
- return 0;
- }
+{
+ unsigned int c = constant_time_is_zero(a);
+ if (a == 0 && c != CONSTTIME_TRUE) {
+ fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
+ "expected %du (TRUE), got %du\n", a, CONSTTIME_TRUE, c);
+ return 1;
+ } else if (a != 0 && c != CONSTTIME_FALSE) {
+ fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
+ "expected %du (FALSE), got %du\n", a, CONSTTIME_FALSE, c);
+ return 1;
+ }
+ return 0;
+}
static int test_is_zero_8(unsigned int a)
- {
- unsigned char c = constant_time_is_zero_8(a);
- if (a == 0 && c != CONSTTIME_TRUE_8)
- {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %u (TRUE), got %u\n", a, CONSTTIME_TRUE_8, c);
- return 1;
- }
- else if (a != 0 && c != CONSTTIME_FALSE)
- {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %u (FALSE), got %u\n", a, CONSTTIME_FALSE_8,
- c);
- return 1;
- }
- return 0;
- }
-
-static unsigned int test_values[] = {0, 1, 1024, 12345, 32000, UINT_MAX/2-1,
- UINT_MAX/2, UINT_MAX/2+1, UINT_MAX-1,
- UINT_MAX};
+{
+ unsigned char c = constant_time_is_zero_8(a);
+ if (a == 0 && c != CONSTTIME_TRUE_8) {
+ fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
+ "expected %u (TRUE), got %u\n", a, CONSTTIME_TRUE_8, c);
+ return 1;
+ } else if (a != 0 && c != CONSTTIME_FALSE) {
+ fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
+ "expected %u (FALSE), got %u\n", a, CONSTTIME_FALSE_8, c);
+ return 1;
+ }
+ return 0;
+}
+
+static int test_select(unsigned int a, unsigned int b)
+{
+ unsigned int selected = constant_time_select(CONSTTIME_TRUE, a, b);
+ if (selected != a) {
+ fprintf(stderr, "Test failed for constant_time_select(%du, %du,"
+ "%du): expected %du(first value), got %du\n",
+ CONSTTIME_TRUE, a, b, a, selected);
+ return 1;
+ }
+ selected = constant_time_select(CONSTTIME_FALSE, a, b);
+ if (selected != b) {
+ fprintf(stderr, "Test failed for constant_time_select(%du, %du,"
+ "%du): expected %du(second value), got %du\n",
+ CONSTTIME_FALSE, a, b, b, selected);
+ return 1;
+ }
+ return 0;
+}
+
+static int test_select_8(unsigned char a, unsigned char b)
+{
+ unsigned char selected = constant_time_select_8(CONSTTIME_TRUE_8, a, b);
+ if (selected != a) {
+ fprintf(stderr, "Test failed for constant_time_select(%u, %u,"
+ "%u): expected %u(first value), got %u\n",
+ CONSTTIME_TRUE, a, b, a, selected);
+ return 1;
+ }
+ selected = constant_time_select_8(CONSTTIME_FALSE_8, a, b);
+ if (selected != b) {
+ fprintf(stderr, "Test failed for constant_time_select(%u, %u,"
+ "%u): expected %u(second value), got %u\n",
+ CONSTTIME_FALSE, a, b, b, selected);
+ return 1;
+ }
+ return 0;
+}
+
+static int test_select_int(int a, int b)
+{
+ int selected = constant_time_select_int(CONSTTIME_TRUE, a, b);
+ if (selected != a) {
+ fprintf(stderr, "Test failed for constant_time_select(%du, %d,"
+ "%d): expected %d(first value), got %d\n",
+ CONSTTIME_TRUE, a, b, a, selected);
+ return 1;
+ }
+ selected = constant_time_select_int(CONSTTIME_FALSE, a, b);
+ if (selected != b) {
+ fprintf(stderr, "Test failed for constant_time_select(%du, %d,"
+ "%d): expected %d(second value), got %d\n",
+ CONSTTIME_FALSE, a, b, b, selected);
+ return 1;
+ }
+ return 0;
+}
+
+static int test_eq_int(int a, int b)
+{
+ unsigned int equal = constant_time_eq_int(a, b);
+ if (a == b && equal != CONSTTIME_TRUE) {
+ fprintf(stderr, "Test failed for constant_time_eq_int(%d, %d): "
+ "expected %du(TRUE), got %du\n", a, b, CONSTTIME_TRUE, equal);
+ return 1;
+ } else if (a != b && equal != CONSTTIME_FALSE) {
+ fprintf(stderr, "Test failed for constant_time_eq_int(%d, %d): "
+ "expected %du(FALSE), got %du\n",
+ a, b, CONSTTIME_FALSE, equal);
+ return 1;
+ }
+ return 0;
+}
+
+static int test_eq_int_8(int a, int b)
+{
+ unsigned char equal = constant_time_eq_int_8(a, b);
+ if (a == b && equal != CONSTTIME_TRUE_8) {
+ fprintf(stderr, "Test failed for constant_time_eq_int_8(%d, %d): "
+ "expected %u(TRUE), got %u\n", a, b, CONSTTIME_TRUE_8, equal);
+ return 1;
+ } else if (a != b && equal != CONSTTIME_FALSE_8) {
+ fprintf(stderr, "Test failed for constant_time_eq_int_8(%d, %d): "
+ "expected %u(FALSE), got %u\n",
+ a, b, CONSTTIME_FALSE_8, equal);
+ return 1;
+ }
+ return 0;
+}
+
+static unsigned int test_values[] =
+ { 0, 1, 1024, 12345, 32000, UINT_MAX / 2 - 1,
+ UINT_MAX / 2, UINT_MAX / 2 + 1, UINT_MAX - 1,
+ UINT_MAX
+};
+
+static unsigned char test_values_8[] =
+ { 0, 1, 2, 20, 32, 127, 128, 129, 255 };
+
+static int signed_test_values[] = { 0, 1, -1, 1024, -1024, 12345, -12345,
+ 32000, -32000, INT_MAX, INT_MIN, INT_MAX - 1,
+ INT_MIN + 1
+};
int main(int argc, char *argv[])
- {
- unsigned int a, b, i, j;
- int num_failed = 0, num_all = 0;
- fprintf(stdout, "Testing constant time operations...\n");
-
- for (i = 0; i < sizeof(test_values)/sizeof(int); ++i)
- {
- a = test_values[i];
- num_failed += test_is_zero(a);
- num_failed += test_is_zero_8(a);
- num_failed += test_binary_op(&constant_time_lt,
- "constant_time_lt", a, a, 0);
- num_failed += test_binary_op_8(&constant_time_lt_8,
- "constant_time_lt_8", a, a, 0);
- num_failed += test_binary_op(&constant_time_ge,
- "constant_time_ge", a, a, 1);
- num_failed += test_binary_op_8(&constant_time_ge_8,
- "constant_time_ge_8", a, a, 1);
- num_failed += test_binary_op(&constant_time_eq,
- "constant_time_eq", a, a, 1);
- num_failed += test_binary_op_8(&constant_time_eq_8,
- "constant_time_eq_8", a, a, 1);
- num_all += 8;
- for (j = i + 1; j < sizeof(test_values)/sizeof(int); ++j)
- {
- b = test_values[j];
- num_failed += test_binary_op(&constant_time_lt,
- "constant_time_lt", a, b, a < b);
- num_failed += test_binary_op_8(&constant_time_lt_8,
- "constant_time_lt_8", a, b, a < b);
- num_failed += test_binary_op(&constant_time_lt,
- "constant_time_lt_8", b, a, b < a);
- num_failed += test_binary_op_8(&constant_time_lt_8,
- "constant_time_lt_8", b, a, b < a);
- num_failed += test_binary_op(&constant_time_ge,
- "constant_time_ge", a, b, a >= b);
- num_failed += test_binary_op_8(&constant_time_ge_8,
- "constant_time_ge_8", a, b, a >= b);
- num_failed += test_binary_op(&constant_time_ge,
- "constant_time_ge", b, a, b >= a);
- num_failed += test_binary_op_8(&constant_time_ge_8,
- "constant_time_ge_8", b, a, b >= a);
- num_failed += test_binary_op(&constant_time_eq,
- "constant_time_eq", a, b, a == b);
- num_failed += test_binary_op_8(&constant_time_eq_8,
- "constant_time_eq_8", a, b, a == b);
- num_failed += test_binary_op(&constant_time_eq,
- "constant_time_eq", b, a, b == a);
- num_failed += test_binary_op_8(&constant_time_eq_8,
- "constant_time_eq_8", b, a, b == a);
- num_all += 12;
- }
- }
-
- if (!num_failed)
- {
- fprintf(stdout, "ok (ran %d tests)\n", num_all);
- return EXIT_SUCCESS;
- }
- else
- {
- fprintf(stdout, "%d of %d tests failed!\n", num_failed, num_all);
- return EXIT_FAILURE;
- }
- }
+{
+ unsigned int a, b, i, j;
+ int c, d;
+ unsigned char e, f;
+ int num_failed = 0, num_all = 0;
+ fprintf(stdout, "Testing constant time operations...\n");
+
+ for (i = 0; i < sizeof(test_values) / sizeof(int); ++i) {
+ a = test_values[i];
+ num_failed += test_is_zero(a);
+ num_failed += test_is_zero_8(a);
+ num_all += 2;
+ for (j = 0; j < sizeof(test_values) / sizeof(int); ++j) {
+ b = test_values[j];
+ num_failed += test_binary_op(&constant_time_lt,
+ "constant_time_lt", a, b, a < b);
+ num_failed += test_binary_op_8(&constant_time_lt_8,
+ "constant_time_lt_8", a, b, a < b);
+ num_failed += test_binary_op(&constant_time_lt,
+ "constant_time_lt_8", b, a, b < a);
+ num_failed += test_binary_op_8(&constant_time_lt_8,
+ "constant_time_lt_8", b, a, b < a);
+ num_failed += test_binary_op(&constant_time_ge,
+ "constant_time_ge", a, b, a >= b);
+ num_failed += test_binary_op_8(&constant_time_ge_8,
+ "constant_time_ge_8", a, b,
+ a >= b);
+ num_failed +=
+ test_binary_op(&constant_time_ge, "constant_time_ge", b, a,
+ b >= a);
+ num_failed +=
+ test_binary_op_8(&constant_time_ge_8, "constant_time_ge_8", b,
+ a, b >= a);
+ num_failed +=
+ test_binary_op(&constant_time_eq, "constant_time_eq", a, b,
+ a == b);
+ num_failed +=
+ test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8", a,
+ b, a == b);
+ num_failed +=
+ test_binary_op(&constant_time_eq, "constant_time_eq", b, a,
+ b == a);
+ num_failed +=
+ test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8", b,
+ a, b == a);
+ num_failed += test_select(a, b);
+ num_all += 13;
+ }
+ }
+
+ for (i = 0; i < sizeof(signed_test_values) / sizeof(int); ++i) {
+ c = signed_test_values[i];
+ for (j = 0; j < sizeof(signed_test_values) / sizeof(int); ++j) {
+ d = signed_test_values[j];
+ num_failed += test_select_int(c, d);
+ num_failed += test_eq_int(c, d);
+ num_failed += test_eq_int_8(c, d);
+ num_all += 3;
+ }
+ }
+
+ for (i = 0; i < sizeof(test_values_8); ++i) {
+ e = test_values_8[i];
+ for (j = 0; j < sizeof(test_values_8); ++j) {
+ f = test_values_8[j];
+ num_failed += test_select_8(e, f);
+ num_all += 1;
+ }
+ }
+
+ if (!num_failed) {
+ fprintf(stdout, "ok (ran %d tests)\n", num_all);
+ return EXIT_SUCCESS;
+ } else {
+ fprintf(stdout, "%d of %d tests failed!\n", num_failed, num_all);
+ return EXIT_FAILURE;
+ }
+}
projects / openssl.git / blobdiff