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friend.go
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friend.go
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package mau
import (
"fmt"
"io"
"os"
"path"
"path/filepath"
"golang.org/x/crypto/openpgp"
"golang.org/x/crypto/openpgp/armor"
"golang.org/x/crypto/openpgp/packet"
)
type Friend struct {
entity *openpgp.Entity
}
func (f *Friend) Identity() (string, error) {
for name := range f.entity.Identities {
return name, nil
}
return "", ErrNoIdentity
}
func (f *Friend) Name() string {
for _, i := range f.entity.Identities {
return i.UserId.Name
}
return ""
}
func (f *Friend) Email() string {
for _, i := range f.entity.Identities {
return i.UserId.Email
}
return ""
}
func (f *Friend) Fingerprint() Fingerprint {
return f.entity.PrimaryKey.Fingerprint
}
func readFriend(account *Account, reader io.Reader) (*Friend, error) {
keyring := openpgp.EntityList{account.entity}
decryptedFile, err := openpgp.ReadMessage(reader, keyring, nil, nil)
if err != nil {
return nil, err
}
entity, err := openpgp.ReadEntity(packet.NewReader(decryptedFile.UnverifiedBody))
if err != nil {
return nil, err
}
return &Friend{entity: entity}, nil
}
func (a *Account) AddFriend(reader io.Reader) (*Friend, error) {
block, err := armor.Decode(reader)
if err != nil {
return nil, err
}
entity, err := openpgp.ReadEntity(packet.NewReader(block.Body))
if err != nil {
return nil, err
}
fpr := Fingerprint(entity.PrimaryKey.Fingerprint).String()
entities := []*openpgp.Entity{a.entity}
filePath := path.Join(mauDir(a.path), fpr+".pgp")
file, err := os.Create(filePath)
if err != nil {
return nil, err
}
w, err := openpgp.Encrypt(file, entities, a.entity, nil, nil)
if err != nil {
return nil, err
}
entity.Serialize(w)
w.Close()
friend := Friend{
entity: entity,
}
return &friend, nil
}
func (a *Account) RemoveFriend(friend *Friend) error {
file := fmt.Sprintf("%s.pgp", friend.Fingerprint())
uncategorized := path.Join(mauDir(a.path), file)
pattern := path.Join(mauDir(a.path), "**", file)
matches, err := filepath.Glob(pattern)
if err != nil {
return err
}
if _, err := os.Stat(uncategorized); err == nil {
matches = append(matches, uncategorized)
}
for _, match := range matches {
err = os.Remove(match)
if err != nil {
return err
}
}
return a.Unfollow(friend)
}
func (a *Account) ListFriends() (*Keyring, error) {
friends := Keyring{Path: mauDir(a.path)}
err := friends.read(a)
if err != nil {
return nil, err
}
return &friends, nil
}