1 files changed, 73 insertions, 0 deletions

diff --git a/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go b/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go
new file mode 100644
index 0000000..1713503
--- /dev/null
+++ b/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go
@@ -0,0 +1,73 @@
+// 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"
+        "encoding/binary"
+        "golang.org/x/crypto/openpgp/errors"
+        "golang.org/x/crypto/openpgp/s2k"
+        "io"
+        "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
+}
+
+const onePassSignatureVersion = 3
+
+func (ops *OnePassSignature) parse(r io.Reader) (err error) {
+        var buf [13]byte
+
+        _, err = readFull(r, buf[:])
+        if err != nil {
+                return
+        }
+        if buf[0] != onePassSignatureVersion {
+                err = errors.UnsupportedError("one-pass-signature packet version " + strconv.Itoa(int(buf[0])))
+        }
+
+        var ok bool
+        ops.Hash, ok = s2k.HashIdToHash(buf[2])
+        if !ok {
+                return errors.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
+}
+
+// Serialize marshals the given OnePassSignature to w.
+func (ops *OnePassSignature) Serialize(w io.Writer) error {
+        var buf [13]byte
+        buf[0] = onePassSignatureVersion
+        buf[1] = uint8(ops.SigType)
+        var ok bool
+        buf[2], ok = s2k.HashToHashId(ops.Hash)
+        if !ok {
+                return errors.UnsupportedError("hash type: " + strconv.Itoa(int(ops.Hash)))
+        }
+        buf[3] = uint8(ops.PubKeyAlgo)
+        binary.BigEndian.PutUint64(buf[4:12], ops.KeyId)
+        if ops.IsLast {
+                buf[12] = 1
+        }
+
+        if err := serializeHeader(w, packetTypeOnePassSignature, len(buf)); err != nil {
+                return err
+        }
+        _, err := w.Write(buf[:])
+        return err
+}