relay: add support of Time-based One-Time Password (TOTP) as second authentication factor in weechat protocol

2 files changed, 37 insertions, 2 deletions

diff --git a/doc/en/weechat_relay_protocol.en.adoc b/doc/en/weechat_relay_protocol.en.adoc
index afe0a0c1a..ac6999471 100644
--- a/doc/en/weechat_relay_protocol.en.adoc
+++ b/doc/en/weechat_relay_protocol.en.adoc
@@ -114,8 +114,12 @@ init [<option>=<value>,[<option>=<value>,...]]
 Arguments:
 
 * _option_: one of following options:
-** _password_: password used to authenticate on _relay_ (option
-   _relay.network.password_ in WeeChat)
+** _password_: password used to authenticate on _relay_
+   (option _relay.network.password_ in WeeChat)
+** _totp_: Time-based One-Time Password (TOTP) used as secondary authentication
+   factor, in addition to the password
+   (option _relay.network.totp_secret_ in WeeChat)
+   _(WeeChat ≥ 2.4)_
 ** _compression_: compression type:
 *** _zlib_: enable _zlib_ compression for messages sent by _relay_
     (enabled by default if _relay_ supports _zlib_ compression)
@@ -134,6 +138,9 @@ init password=mypass
 # initialize with commas in the password (WeeChat ≥ 1.6)
 init password=mypass\,with\,commas
 
+# initialize with password and TOTP (WeeChat ≥ 2.4)
+init password=mypass,totp=123456
+
 # initialize and disable compression
 init password=mypass,compression=off
 ----
diff --git a/doc/en/weechat_user.en.adoc b/doc/en/weechat_user.en.adoc
index efbcff4fe..361c452b7 100644
--- a/doc/en/weechat_user.en.adoc
+++ b/doc/en/weechat_user.en.adoc
@@ -3161,6 +3161,34 @@ It is highly recommended to set a password for relay, with command:
 
 This password is used for _irc_ and _weechat_ protocols.
 
+[[relay_totp]]
+==== TOTP
+
+TOTP (Time-based One-Time Password) can be used as secondary authentication
+factor for _weechat_ protocol, in addition to the password.
+
+This is optional and increases the security level.
+
+One-time passwords can be generated with applications, for example:
+
+* FreeOTP:
+  https://play.google.com/store/apps/details?id=org.fedorahosted.freeotp[Android],
+  https://itunes.apple.com/fr/app/freeotp-authenticator/id872559395[iOS]
+  (https://freeotp.github.io/[web site])
+* Google Authenticator:
+  https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2[Android],
+  https://itunes.apple.com/fr/app/google-authenticator/id388497605[iOS]
+
+The TOTP secret must be set in WeeChat and the application used to generate
+one-time passwords.
+
+It must be a string encoded in base32, with only letters and digits from 2 to 7,
+for example:
+
+----
+/set relay.network.totp_secret "secretpasswordbase32"
+----
+
 [[relay_ssl]]
 ==== SSL