Method: OpenSSL::BN#prime?

Defined in:
ossl_bn.c

#prime? ⇒ Boolean #prime?(checks) ⇒ Boolean

Performs a Miller-Rabin probabilistic primality test for bn.

checks parameter is deprecated in version 3.0. It has no effect.

Returns:

  • (Boolean)
[View source]

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# File 'ossl_bn.c', line 1122

static VALUE
ossl_bn_is_prime(int argc, VALUE *argv, VALUE self)
{
    BIGNUM *bn;
    int ret;

    rb_check_arity(argc, 0, 1);
    GetBN(self, bn);

#ifdef HAVE_BN_CHECK_PRIME
    ret = BN_check_prime(bn, ossl_bn_ctx, NULL);
    if (ret < 0)
        ossl_raise(eBNError, "BN_check_prime");
#else
    ret = BN_is_prime_fasttest_ex(bn, BN_prime_checks, ossl_bn_ctx, 1, NULL);
    if (ret < 0)
        ossl_raise(eBNError, "BN_is_prime_fasttest_ex");
#endif
    return ret ? Qtrue : Qfalse;
}