Initial QSfera import

Server/vendor/github.com/crewjam/saml/flate.go

@@ -0,0 +1,31 @@
+package saml
+
+import (
+	"compress/flate"
+	"fmt"
+	"io"
+)
+
+const flateUncompressLimit = 10 * 1024 * 1024 // 10MB
+
+func newSaferFlateReader(r io.Reader) io.ReadCloser {
+	return &saferFlateReader{r: flate.NewReader(r)}
+}
+
+type saferFlateReader struct {
+	r     io.ReadCloser
+	count int
+}
+
+func (r *saferFlateReader) Read(p []byte) (n int, err error) {
+	if r.count+len(p) > flateUncompressLimit {
+		return 0, fmt.Errorf("flate: uncompress limit exceeded (%d bytes)", flateUncompressLimit)
+	}
+	n, err = r.r.Read(p)
+	r.count += n
+	return n, err
+}
+
+func (r *saferFlateReader) Close() error {
+	return r.r.Close()
+}