Index: openpgp/packet/literal.go |
=================================================================== |
new file mode 100644 |
--- /dev/null |
+++ b/openpgp/packet/literal.go |
@@ -0,0 +1,89 @@ |
+// Copyright 2011 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 packet |
+ |
+import ( |
+ "encoding/binary" |
+ "io" |
+) |
+ |
+// LiteralData represents an encrypted file. See RFC 4880, section 5.9. |
+type LiteralData struct { |
+ IsBinary bool |
+ FileName string |
+ Time uint32 // Unix epoch time. Either creation time or modification time. 0 means undefined. |
+ Body io.Reader |
+} |
+ |
+// ForEyesOnly returns whether the contents of the LiteralData have been marked |
+// as especially sensitive. |
+func (l *LiteralData) ForEyesOnly() bool { |
+ return l.FileName == "_CONSOLE" |
+} |
+ |
+func (l *LiteralData) parse(r io.Reader) (err error) { |
+ var buf [256]byte |
+ |
+ _, err = readFull(r, buf[:2]) |
+ if err != nil { |
+ return |
+ } |
+ |
+ l.IsBinary = buf[0] == 'b' |
+ fileNameLen := int(buf[1]) |
+ |
+ _, err = readFull(r, buf[:fileNameLen]) |
+ if err != nil { |
+ return |
+ } |
+ |
+ l.FileName = string(buf[:fileNameLen]) |
+ |
+ _, err = readFull(r, buf[:4]) |
+ if err != nil { |
+ return |
+ } |
+ |
+ l.Time = binary.BigEndian.Uint32(buf[:4]) |
+ l.Body = r |
+ return |
+} |
+ |
+// SerializeLiteral serializes a literal data packet to w and returns a |
+// WriteCloser to which the data itself can be written and which MUST be closed |
+// on completion. The fileName is truncated to 255 bytes. |
+func SerializeLiteral(w io.WriteCloser, isBinary bool, fileName string, time uint32) (plaintext io.WriteCloser, err error) { |
+ var buf [4]byte |
+ buf[0] = 't' |
+ if isBinary { |
+ buf[0] = 'b' |
+ } |
+ if len(fileName) > 255 { |
+ fileName = fileName[:255] |
+ } |
+ buf[1] = byte(len(fileName)) |
+ |
+ inner, err := serializeStreamHeader(w, packetTypeLiteralData) |
+ if err != nil { |
+ return |
+ } |
+ |
+ _, err = inner.Write(buf[:2]) |
+ if err != nil { |
+ return |
+ } |
+ _, err = inner.Write([]byte(fileName)) |
+ if err != nil { |
+ return |
+ } |
+ binary.BigEndian.PutUint32(buf[:], time) |
+ _, err = inner.Write(buf[:]) |
+ if err != nil { |
+ return |
+ } |
+ |
+ plaintext = inner |
+ return |
+} |