BN_asc2bn
r = BN_asc2bn(tmpbn, value);
if (!BN_asc2bn(&pubexp, value))
int BN_asc2bn(BIGNUM **a, const char *str);
|| !TEST_true(BN_asc2bn(&bn, test->base10)))
if (!TEST_true(BN_asc2bn(&bn, "0"))
if (!TEST_true(BN_asc2bn(&bn, "256"))
if (!TEST_true(BN_asc2bn(&bn, "-42"))
if (!TEST_true(BN_asc2bn(&bn, "0x1234"))
if (!TEST_true(BN_asc2bn(&bn, "0X1234"))
if (!TEST_true(BN_asc2bn(&bn, "-0xabcd"))
if (!TEST_true(BN_asc2bn(&bn, "-0"))
if (!TEST_true(BN_asc2bn(&bn, "123trailing garbage is ignored"))
|| !TEST_true(BN_asc2bn(&bn, test->base10)))