We build too many walls and not enough bridges

pkg/pmapi/key.go

@@ -0,0 +1,138 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package pmapi
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+
+	pmcrypto "github.com/ProtonMail/gopenpgp/crypto"
+)
+
+// Flags
+const (
+	UseToVerifyFlag = 1 << iota
+	UseToEncryptFlag
+)
+
+type PublicKeyRes struct {
+	Res
+
+	RecipientType int
+	MIMEType      string
+	Keys          []PublicKey
+}
+
+type PublicKey struct {
+	Flags     int
+	PublicKey string
+}
+
+// PublicKeys returns the public keys of the given email addresses.
+func (c *Client) PublicKeys(emails []string) (keys map[string]*pmcrypto.KeyRing, err error) {
+	if len(emails) == 0 {
+		err = fmt.Errorf("pmapi: cannot get public keys: no email address provided")
+		return
+	}
+	keys = map[string]*pmcrypto.KeyRing{}
+
+	for _, email := range emails {
+		email = url.QueryEscape(email)
+
+		var req *http.Request
+		if req, err = NewRequest("GET", "/keys?Email="+email, nil); err != nil {
+			return
+		}
+
+		var res PublicKeyRes
+		if err = c.DoJSON(req, &res); err != nil {
+			return
+		}
+
+		for _, key := range res.Keys {
+			if key.Flags&UseToEncryptFlag == UseToEncryptFlag {
+				var kr *pmcrypto.KeyRing
+				if kr, err = pmcrypto.ReadArmoredKeyRing(strings.NewReader(key.PublicKey)); err != nil {
+					return
+				}
+				keys[email] = kr
+			}
+		}
+	}
+
+	return keys, err
+}
+
+const (
+	RecipientInternal = 1
+	RecipientExternal = 2
+)
+
+// GetPublicKeysForEmail returns all sending public keys for the given email address.
+func (c *Client) GetPublicKeysForEmail(email string) (keys []PublicKey, internal bool, err error) {
+	email = url.QueryEscape(email)
+
+	var req *http.Request
+	if req, err = NewRequest("GET", "/keys?Email="+email, nil); err != nil {
+		return
+	}
+
+	var res PublicKeyRes
+	if err = c.DoJSON(req, &res); err != nil {
+		return
+	}
+
+	internal = res.RecipientType == RecipientInternal
+
+	for _, key := range res.Keys {
+		if key.Flags&UseToEncryptFlag == UseToEncryptFlag {
+			keys = append(keys, key)
+		}
+	}
+	return
+}
+
+// KeySalt contains id and salt for key.
+type KeySalt struct {
+	ID, KeySalt string
+}
+
+// KeySaltRes is used to unmarshal API response.
+type KeySaltRes struct {
+	Res
+	KeySalts []KeySalt
+}
+
+// GetKeySalts sends request to get list of key salts (n.b. locked route).
+func (c *Client) GetKeySalts() (keySalts []KeySalt, err error) {
+	var req *http.Request
+	if req, err = NewRequest("GET", "/keys/salts", nil); err != nil {
+		return
+	}
+
+	var res KeySaltRes
+	if err = c.DoJSON(req, &res); err != nil {
+		return
+	}
+
+	keySalts = res.KeySalts
+
+	return
+}