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Code Issues Releases Wiki Activity

bignum: introduce copy

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This commit is contained in:
Alex Beregszaszi 2016-08-25 23:20:09 +01:00
parent 62a0db8c4e
commit dd25a2ee5a
3 changed files with 24 additions and 0 deletions
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9
bignum.c
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@ -156,6 +156,15 @@ void bn_write_le(const bignum256 *in_number, uint8_t *out_number)
}
}
// copies number a to b
void bn_copy(bignum256 *a, bignum256 *b)
{
int i;
for (i = 0; i < 9; i++) {
b->val[i] = a->val[i];
}
}
// sets a bignum to zero.
void bn_zero(bignum256 *a)
{

2
bignum.h
View File

@ -53,6 +53,8 @@ void bn_read_le(const uint8_t *in_number, bignum256 *out_number);
void bn_write_le(const bignum256 *in_number, uint8_t *out_number);
void bn_copy(bignum256 *a, bignum256 *b);
void bn_zero(bignum256 *a);
int bn_is_zero(const bignum256 *a);

13
tests.c
View File

@ -153,6 +153,18 @@ START_TEST(test_bignum_write_le)
}
END_TEST
START_TEST(test_bignum_copy)
{
bignum256 a;
bignum256 b;
bn_read_be(fromhex("c55ece858b0ddd5263f96810fe14437cd3b5e1fbd7c6a2ec1e031f05e86d8bd5"), &a);
bn_copy(&a, &b);
ck_assert_int_eq(bn_is_equal(&a, &b), 1);
}
END_TEST
// from https://github.com/bitcoin/bitcoin/blob/master/src/test/data/base58_keys_valid.json
START_TEST(test_base58)
{
@ -2403,6 +2415,7 @@ Suite *test_suite(void)
tcase_add_test(tc, test_bignum_equal);
tcase_add_test(tc, test_bignum_read_le);
tcase_add_test(tc, test_bignum_write_le);
tcase_add_test(tc, test_bignum_copy);
suite_add_tcase(s, tc);
tc = tcase_create("base58");