signature_algorithm() public

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static VALUE
ossl_x509_get_signature_algorithm(VALUE self)
{
    X509 *x509;
    BIO *out;
    VALUE str;

    GetX509(self, x509);
    out = BIO_new(BIO_s_mem());
    if (!out) ossl_raise(eX509CertError, NULL);

    if (!i2a_ASN1_OBJECT(out, X509_get0_tbs_sigalg(x509)->algorithm)) {
        BIO_free(out);
        ossl_raise(eX509CertError, NULL);
    }
    str = ossl_membio2str(out);

    return str;
}
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