Use bitflags for CMS options

use x509::X509;

use {cvt, cvt_p};

bitflags! {

    pub struct CMSOptions : u32 {

        const CMS_TEXT = 0x1;

        const CMS_NOCERTS = 0x2;

        const CMS_NO_CONTENT_VERIFY = 0x4;

        const CMS_NO_ATTR_VERIFY = 0x8;

        const CMS_NOSIGS = 0x4 | 0x8;

        const CMS_NOINTERN = 0x10;

        const CMS_NO_SIGNER_CERT_VERIFY = 0x20;

        const CMS_NOVERIFY = 0x20;

        const CMS_DETACHED = 0x40;

        const CMS_BINARY = 0x80;

        const CMS_NOATTR = 0x100;

        const CMS_NOSMIMECAP = 0x200;

        const CMS_NOOLDMIMETYPE = 0x400;

        const CMS_CRLFEOL = 0x800;

        const CMS_STREAM = 0x1000;

        const CMS_NOCRL = 0x2000;

        const CMS_PARTIAL = 0x4000;

        const CMS_REUSE_DIGEST = 0x8000;

        const CMS_USE_KEYID = 0x10000;

        const CMS_DEBUG_DECRYPT = 0x20000;

        const CMS_KEY_PARAM = 0x40000;

        const CMS_ASCIICRLF = 0x80000;

    }

}

foreign_type_and_impl_send_sync! {

    type CType = ffi::CMS_ContentInfo;

    fn drop = ffi::CMS_ContentInfo_free;

        pkey: Option<&PKeyRef<T>>,

        certs: Option<&Stack<X509>>,

        data: Option<&[u8]>,

        flags: u32,

        flags: CMSOptions,

    ) -> Result<CmsContentInfo, ErrorStack> {

        unsafe {

            let signcert = match signcert {

                None => ptr::null_mut(),

            };

            let cms = cvt_p(ffi::CMS_sign(signcert, pkey, certs, data_bio_ptr, flags))?;

            let cms = cvt_p(ffi::CMS_sign(signcert, pkey, certs, data_bio_ptr, flags.bits()))?;

            Ok(CmsContentInfo::from_ptr(cms))

        }