1 files changed, 40 insertions, 0 deletions
diff --git a/doc/talks/io2010/decrypt.go b/doc/talks/io2010/decrypt.go
new file mode 100644
index 000000000..3292c30b2
--- /dev/null
+++ b/doc/talks/io2010/decrypt.go
@@ -0,0 +1,40 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"crypto/aes"
+	"crypto/block"
+	"compress/gzip"
+	"io"
+	"os"
+)
+
+func EncryptAndGzip(dstfile, srcfile string, key, iv []byte) {
+	r, _ := os.Open(srcfile, os.O_RDONLY, 0)
+	var w io.Writer
+	w, _ = os.Open(dstfile, os.O_WRONLY|os.O_CREATE, 0666)
+	c, _ := aes.NewCipher(key)
+	w = block.NewOFBWriter(c, iv, w)
+	w2, _ := gzip.NewDeflater(w)
+	io.Copy(w2, r)
+	w2.Close()
+}
+
+func DecryptAndGunzip(dstfile, srcfile string, key, iv []byte) {
+	f, _ := os.Open(srcfile, os.O_RDONLY, 0)
+	defer f.Close()
+	c, _ := aes.NewCipher(key)
+	r := block.NewOFBReader(c, iv, f)
+	r, _ = gzip.NewInflater(r)
+	w, _ := os.Open(dstfile, os.O_WRONLY|os.O_CREATE, 0666)
+	defer w.Close()
+	io.Copy(w, r)
+}
+
+func main() {
+	EncryptAndGzip("/tmp/passwd.gz", "/etc/passwd", make([]byte, 16), make([]byte, 16))
+	DecryptAndGunzip("/dev/stdout", "/tmp/passwd.gz", make([]byte, 16), make([]byte, 16))
+}