diff options
Diffstat (limited to 'crypto/constant_time_test.c')
| -rw-r--r-- | crypto/constant_time_test.c | 118 |
1 files changed, 101 insertions, 17 deletions
diff --git a/crypto/constant_time_test.c b/crypto/constant_time_test.c index 89fad7d3f2..0e51892af5 100644 --- a/crypto/constant_time_test.c +++ b/crypto/constant_time_test.c @@ -50,9 +50,9 @@ #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), @@ -133,13 +133,86 @@ static int test_is_zero_8(unsigned int a) 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 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 c, d; + unsigned char e, f; int num_failed = 0, num_all = 0; fprintf(stdout, "Testing constant time operations...\n"); @@ -148,20 +221,8 @@ int main(int argc, char *argv[]) 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) + 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, @@ -188,7 +249,30 @@ int main(int argc, char *argv[]) "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; + 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_all += 1; + } + } + + 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; } } |