1 files changed, 160 insertions, 0 deletions

diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userid.go b/vendor/golang.org/x/crypto/openpgp/packet/userid.go
new file mode 100644
index 0000000..d6bea7d
--- /dev/null
+++ b/vendor/golang.org/x/crypto/openpgp/packet/userid.go
@@ -0,0 +1,160 @@
+// 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 (
+        "io"
+        "io/ioutil"
+        "strings"
+)
+
+// UserId contains text that is intended to represent the name and email
+// address of the key holder. See RFC 4880, section 5.11. By convention, this
+// takes the form "Full Name (Comment) <email@example.com>"
+type UserId struct {
+        Id string // By convention, this takes the form "Full Name (Comment) <email@example.com>" which is split out in the fields below.
+
+        Name, Comment, Email string
+}
+
+func hasInvalidCharacters(s string) bool {
+        for _, c := range s {
+                switch c {
+                case '(', ')', '<', '>', 0:
+                        return true
+                }
+        }
+        return false
+}
+
+// NewUserId returns a UserId or nil if any of the arguments contain invalid
+// characters. The invalid characters are '\x00', '(', ')', '<' and '>'
+func NewUserId(name, comment, email string) *UserId {
+        // RFC 4880 doesn't deal with the structure of userid strings; the
+        // name, comment and email form is just a convention. However, there's
+        // no convention about escaping the metacharacters and GPG just refuses
+        // to create user ids where, say, the name contains a '('. We mirror
+        // this behaviour.
+
+        if hasInvalidCharacters(name) || hasInvalidCharacters(comment) || hasInvalidCharacters(email) {
+                return nil
+        }
+
+        uid := new(UserId)
+        uid.Name, uid.Comment, uid.Email = name, comment, email
+        uid.Id = name
+        if len(comment) > 0 {
+                if len(uid.Id) > 0 {
+                        uid.Id += " "
+                }
+                uid.Id += "("
+                uid.Id += comment
+                uid.Id += ")"
+        }
+        if len(email) > 0 {
+                if len(uid.Id) > 0 {
+                        uid.Id += " "
+                }
+                uid.Id += "<"
+                uid.Id += email
+                uid.Id += ">"
+        }
+        return uid
+}
+
+func (uid *UserId) parse(r io.Reader) (err error) {
+        // RFC 4880, section 5.11
+        b, err := ioutil.ReadAll(r)
+        if err != nil {
+                return
+        }
+        uid.Id = string(b)
+        uid.Name, uid.Comment, uid.Email = parseUserId(uid.Id)
+        return
+}
+
+// Serialize marshals uid to w in the form of an OpenPGP packet, including
+// header.
+func (uid *UserId) Serialize(w io.Writer) error {
+        err := serializeHeader(w, packetTypeUserId, len(uid.Id))
+        if err != nil {
+                return err
+        }
+        _, err = w.Write([]byte(uid.Id))
+        return err
+}
+
+// parseUserId extracts the name, comment and email from a user id string that
+// is formatted as "Full Name (Comment) <email@example.com>".
+func parseUserId(id string) (name, comment, email string) {
+        var n, c, e struct {
+                start, end int
+        }
+        var state int
+
+        for offset, rune := range id {
+                switch state {
+                case 0:
+                        // Entering name
+                        n.start = offset
+                        state = 1
+                        fallthrough
+                case 1:
+                        // In name
+                        if rune == '(' {
+                                state = 2
+                                n.end = offset
+                        } else if rune == '<' {
+                                state = 5
+                                n.end = offset
+                        }
+                case 2:
+                        // Entering comment
+                        c.start = offset
+                        state = 3
+                        fallthrough
+                case 3:
+                        // In comment
+                        if rune == ')' {
+                                state = 4
+                                c.end = offset
+                        }
+                case 4:
+                        // Between comment and email
+                        if rune == '<' {
+                                state = 5
+                        }
+                case 5:
+                        // Entering email
+                        e.start = offset
+                        state = 6
+                        fallthrough
+                case 6:
+                        // In email
+                        if rune == '>' {
+                                state = 7
+                                e.end = offset
+                        }
+                default:
+                        // After email
+                }
+        }
+        switch state {
+        case 1:
+                // ended in the name
+                n.end = len(id)
+        case 3:
+                // ended in comment
+                c.end = len(id)
+        case 6:
+                // ended in email
+                e.end = len(id)
+        }
+
+        name = strings.TrimSpace(id[n.start:n.end])
+        comment = strings.TrimSpace(id[c.start:c.end])
+        email = strings.TrimSpace(id[e.start:e.end])
+        return
+}