| // 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 ( |
| "crypto" |
| "crypto/openpgp/error" |
| "crypto/openpgp/s2k" |
| "encoding/binary" |
| "io" |
| "os" |
| "strconv" |
| ) |
| |
| // OnePassSignature represents a one-pass signature packet. See RFC 4880, |
| // section 5.4. |
| type OnePassSignature struct { |
| SigType SignatureType |
| Hash crypto.Hash |
| PubKeyAlgo PublicKeyAlgorithm |
| KeyId uint64 |
| IsLast bool |
| } |
| |
| func (ops *OnePassSignature) parse(r io.Reader) (err os.Error) { |
| var buf [13]byte |
| |
| _, err = readFull(r, buf[:]) |
| if err != nil { |
| return |
| } |
| if buf[0] != 3 { |
| err = error.UnsupportedError("one-pass-signature packet version " + strconv.Itoa(int(buf[0]))) |
| } |
| |
| var ok bool |
| ops.Hash, ok = s2k.HashIdToHash(buf[2]) |
| if !ok { |
| return error.UnsupportedError("hash function: " + strconv.Itoa(int(buf[2]))) |
| } |
| |
| ops.SigType = SignatureType(buf[1]) |
| ops.PubKeyAlgo = PublicKeyAlgorithm(buf[3]) |
| ops.KeyId = binary.BigEndian.Uint64(buf[4:12]) |
| ops.IsLast = buf[12] != 0 |
| return |
| } |