OpenSSL::PKCS7#add_recipient

static VALUE
ossl_pkcs7_add_recipient(VALUE self, VALUE recip)
{
    PKCS7 *pkcs7;
    PKCS7_RECIP_INFO *ri, *ri_new;

    GetPKCS7(self, pkcs7);
    GetPKCS7ri(recip, ri);

    ri_new = ossl_PKCS7_RECIP_INFO_dup(ri);
    if (!ri_new)
        ossl_raise(ePKCS7Error, "PKCS7_RECIP_INFO_dup");

    if (PKCS7_add_recipient_info(pkcs7, ri_new) != 1) {
        PKCS7_RECIP_INFO_free(ri_new);
        ossl_raise(ePKCS7Error, "PKCS7_add_recipient_info");
    }

    return self;
}