if opts != nil && len(opts.DNSName) > 0 {
		err = checkChainSSLServerPolicy(c, chainCtx, opts)
		if err != nil {
			return nil, err
		}
	}

	chain, err = extractSimpleChain(chainCtx.Chains, int(chainCtx.ChainCount))
	if err != nil {
		return nil, err
	}
	if len(chain) == 0 {
		return nil, errors.New("x509: internal error: system verifier returned an empty chain")
	}

	EncodedCert  *byte
	Length       uint32
	CertInfo     *CertInfo
	Store        Handle
}

type CertChainContext struct {
	Size                       uint32
	TrustStatus                CertTrustStatus
	ChainCount                 uint32
	Chains                     **CertSimpleChain
	LowerQualityChainCount     uint32
	LowerQualityChains         **CertChainContext
	HasRevocationFreshnessTime uint32

		}
	}
	// Update window information.
	d.windowEnd = n
	d.index = n
}

// Try to find a match starting at index whose length is greater than prevSize.
// We only look at chainCount possibilities before giving up.
func (d *compressor) findMatch(pos int, prevHead int, prevLength int, lookahead int) (length, offset int, ok bool) {
	minMatchLook := maxMatchLength
	if lookahead < minMatchLook {

	Length       uint32
	CertInfo     *CertInfo
	Store        Handle
}

type CertChainContext struct {
	Size                       uint32
	TrustStatus                CertTrustStatus
	ChainCount                 uint32
	Chains                     **CertSimpleChain
	LowerQualityChainCount     uint32
	LowerQualityChains         **CertChainContext
	HasRevocationFreshnessTime uint32

		{"CTRL_SHUTDOWN_EVENT", Const, 14},
		{"CancelIo", Func, 0},
		{"CancelIoEx", Func, 1},
		{"CertAddCertificateContextToStore", Func, 0},
		{"CertChainContext", Type, 0},
		{"CertChainContext.ChainCount", Field, 0},
		{"CertChainContext.Chains", Field, 0},
		{"CertChainContext.HasRevocationFreshnessTime", Field, 0},
		{"CertChainContext.LowerQualityChainCount", Field, 0},

pkg syscall (windows-386), type ByHandleFileInformation struct, VolumeSerialNumber uint32
pkg syscall (windows-386), type CertChainContext struct
pkg syscall (windows-386), type CertChainContext struct, ChainCount uint32
pkg syscall (windows-386), type CertChainContext struct, Chains **CertSimpleChain
pkg syscall (windows-386), type CertChainContext struct, HasRevocationFreshnessTime uint32