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Merge pull request #697 from slingamn/issue696_opercertfp.1

fix #696
This commit is contained in:
Shivaram Lingamneni 2019-12-19 18:34:52 -05:00 committed by GitHub
commit 8720287f3a
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 139 additions and 36 deletions

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@ -1354,3 +1354,18 @@ func (client *Client) CheckInvited(casefoldedChannel string) (invited bool) {
delete(client.invitedTo, casefoldedChannel)
return
}
// Implements auto-oper by certfp (scans for an auto-eligible operator block that matches
// the client's cert, then applies it).
func (client *Client) attemptAutoOper(session *Session) {
if client.certfp == "" || client.HasMode(modes.Operator) {
return
}
for _, oper := range client.server.Config().operators {
if oper.Auto && oper.Pass == nil && utils.CertfpsMatch(oper.Fingerprint, client.certfp) {
rb := NewResponseBuffer(session)
applyOper(client, oper, rb)
rb.Send(true)
}
}
}

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@ -206,7 +206,7 @@ func init() {
},
"OPER": {
handler: operHandler,
minParams: 2,
minParams: 1,
},
"PART": {
handler: partHandler,

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@ -207,11 +207,13 @@ type OperClassConfig struct {
// OperConfig defines a specific operator's configuration.
type OperConfig struct {
Class string
Vhost string
WhoisLine string `yaml:"whois-line"`
Password string
Modes string
Class string
Vhost string
WhoisLine string `yaml:"whois-line"`
Password string
Fingerprint string
Auto bool
Modes string
}
// LineLenConfig controls line lengths.
@ -454,12 +456,14 @@ func (conf *Config) OperatorClasses() (map[string]*OperClass, error) {
// Oper represents a single assembled operator's config.
type Oper struct {
Name string
Class *OperClass
WhoisLine string
Vhost string
Pass []byte
Modes []modes.ModeChange
Name string
Class *OperClass
WhoisLine string
Vhost string
Pass []byte
Fingerprint string
Auto bool
Modes []modes.ModeChange
}
// Operators returns a map of operator configs from the given OperClass and config.
@ -475,9 +479,17 @@ func (conf *Config) Operators(oc map[string]*OperClass) (map[string]*Oper, error
}
oper.Name = name
oper.Pass, err = decodeLegacyPasswordHash(opConf.Password)
if err != nil {
return nil, err
if opConf.Password != "" {
oper.Pass, err = decodeLegacyPasswordHash(opConf.Password)
if err != nil {
return nil, fmt.Errorf("Oper %s has an invalid password hash: %s", oper.Name, err.Error())
}
}
oper.Fingerprint = opConf.Fingerprint
oper.Auto = opConf.Auto
if oper.Pass == nil && oper.Fingerprint == "" {
return nil, fmt.Errorf("Oper %s has neither a password nor a fingerprint", name)
}
oper.Vhost = opConf.Vhost

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@ -2170,28 +2170,50 @@ func npcaHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Resp
return false
}
// OPER <name> <password>
// OPER <name> [password]
func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *ResponseBuffer) bool {
if client.HasMode(modes.Operator) {
rb.Add(nil, server.name, ERR_UNKNOWNERROR, client.Nick(), "OPER", client.t("You're already opered-up!"))
return false
}
authorized := false
// must pass at least one check, and all enabled checks
var checkPassed, checkFailed bool
oper := server.GetOperator(msg.Params[0])
if oper != nil {
password := []byte(msg.Params[1])
authorized = (bcrypt.CompareHashAndPassword(oper.Pass, password) == nil)
if oper.Fingerprint != "" {
if utils.CertfpsMatch(oper.Fingerprint, client.certfp) {
checkPassed = true
} else {
checkFailed = true
}
}
if !checkFailed && oper.Pass != nil {
if len(msg.Params) == 1 || bcrypt.CompareHashAndPassword(oper.Pass, []byte(msg.Params[1])) != nil {
checkFailed = true
} else {
checkPassed = true
}
}
}
if !authorized {
if !checkPassed || checkFailed {
rb.Add(nil, server.name, ERR_PASSWDMISMATCH, client.Nick(), client.t("Password incorrect"))
client.Quit(client.t("Password incorrect"), rb.session)
return true
}
oldNickmask := client.NickMaskString()
applyOper(client, oper, rb)
return false
}
// applies operator status to a client, who MUST NOT already be an operator
func applyOper(client *Client, oper *Oper, rb *ResponseBuffer) {
details := client.Details()
oldNickmask := details.nickMask
client.SetOper(oper)
if client.NickMaskString() != oldNickmask {
newNickmask := client.NickMaskString()
if newNickmask != oldNickmask {
client.sendChghost(oldNickmask, oper.Vhost)
}
@ -2204,17 +2226,14 @@ func operHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Resp
copy(modeChanges[1:], oper.Modes)
applied := ApplyUserModeChanges(client, modeChanges, true)
rb.Add(nil, server.name, RPL_YOUREOPER, client.nick, client.t("You are now an IRC operator"))
rb.Add(nil, server.name, "MODE", client.nick, applied.String())
client.server.snomasks.Send(sno.LocalOpers, fmt.Sprintf(ircfmt.Unescape("Client opered up $c[grey][$r%s$c[grey], $r%s$c[grey]]"), client.nickMaskString, oper.Name))
server.snomasks.Send(sno.LocalOpers, fmt.Sprintf(ircfmt.Unescape("Client opered up $c[grey][$r%s$c[grey], $r%s$c[grey]]"), client.nickMaskString, oper.Name))
// client may now be unthrottled by the fakelag system
rb.Broadcast(nil, client.server.name, RPL_YOUREOPER, details.nick, client.t("You are now an IRC operator"))
rb.Broadcast(nil, client.server.name, "MODE", details.nick, applied.String())
for _, session := range client.Sessions() {
// client may now be unthrottled by the fakelag system
session.resetFakelag()
}
return false
}
// PART <channel>{,<channel>} [<reason>]
@ -2641,7 +2660,7 @@ func webircHandler(server *Server, client *Client, msg ircmsg.IrcMessage, rb *Re
if 0 < len(info.Password) && bcrypt.CompareHashAndPassword(info.Password, givenPassword) != nil {
continue
}
if 0 < len(info.Fingerprint) && client.certfp != info.Fingerprint {
if 0 < len(info.Fingerprint) && !utils.CertfpsMatch(info.Fingerprint, client.certfp) {
continue
}

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@ -349,7 +349,7 @@ The NPC command is used to send an action to the target as the source.
Requires the roleplay mode (+E) to be set on the target.`,
},
"oper": {
text: `OPER <name> <password>
text: `OPER <name> [password]
If the correct details are given, gives you IRCop privs.`,
},

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@ -77,6 +77,18 @@ func (rb *ResponseBuffer) Add(tags map[string]string, prefix string, command str
rb.AddMessage(ircmsg.MakeMessage(tags, prefix, command, params...))
}
// Broadcast adds a standard new message to our queue, then sends an unlabeled copy
// to all other sessions.
func (rb *ResponseBuffer) Broadcast(tags map[string]string, prefix string, command string, params ...string) {
// can't reuse the IrcMessage object because of tag pollution :-\
rb.Add(tags, prefix, command, params...)
for _, session := range rb.session.client.Sessions() {
if session != rb.session {
session.Send(tags, prefix, command, params...)
}
}
}
// AddFromClient adds a new message from a specific client to our queue.
func (rb *ResponseBuffer) AddFromClient(time time.Time, msgid string, fromNickMask string, fromAccount string, tags map[string]string, command string, params ...string) {
msg := ircmsg.MakeMessage(nil, fromNickMask, command, params...)

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@ -440,6 +440,9 @@ func (server *Server) playRegistrationBurst(session *Session) {
if modestring != "+" {
session.Send(nil, d.nickMask, RPL_UMODEIS, d.nick, modestring)
}
c.attemptAutoOper(session)
if server.logger.IsLoggingRawIO() {
session.Send(nil, c.server.name, "NOTICE", d.nick, c.t("This server is in debug mode and is logging all user I/O. If you do not wish for everything you send to be readable by the server owner(s), please disconnect."))
}

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@ -8,6 +8,7 @@ import (
"crypto/subtle"
"encoding/base32"
"encoding/base64"
"strings"
)
var (
@ -68,3 +69,15 @@ func GenerateSecretKey() string {
rand.Read(buf[:])
return base64.RawURLEncoding.EncodeToString(buf[:])
}
func normalizeCertfp(certfp string) string {
return strings.ToLower(strings.Replace(certfp, ":", "", -1))
}
// Convenience to compare certfps as returned by different tools, e.g., openssl vs. oragono
func CertfpsMatch(storedCertfp, suppliedCertfp string) bool {
if storedCertfp == "" {
return false
}
return normalizeCertfp(storedCertfp) == normalizeCertfp(suppliedCertfp)
}

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@ -81,3 +81,21 @@ func BenchmarkMungeSecretToken(b *testing.B) {
t = MungeSecretToken(t)
}
}
func TestCertfpComparisons(t *testing.T) {
opensslFP := "3D:6B:11:BF:B4:05:C3:F8:4B:38:CD:30:38:FB:EC:01:71:D5:03:54:79:04:07:88:4C:A5:5D:23:41:85:66:C9"
oragonoFP := "3d6b11bfb405c3f84b38cd3038fbec0171d50354790407884ca55d23418566c9"
badFP := "3d6b11bfb405c3f84b38cd3038fbec0171d50354790407884ca55d23418566c8"
if !CertfpsMatch(opensslFP, oragonoFP) {
t.Error("these certs should match")
}
if !CertfpsMatch(oragonoFP, opensslFP) {
t.Error("these certs should match")
}
if CertfpsMatch("", "") {
t.Error("empty stored certfp should not match empty provided certfp")
}
if CertfpsMatch(opensslFP, badFP) {
t.Error("these certs should not match")
}
}

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@ -120,10 +120,11 @@ server:
webirc:
# one webirc block -- should correspond to one set of gateways
-
# tls fingerprint the gateway must connect with to use this webirc block
fingerprint: 938dd33f4b76dcaf7ce5eb25c852369cb4b8fb47ba22fc235aa29c6623a5f182
# SHA-256 fingerprint of the TLS certificate the gateway must use to connect
# (comment this out to use passwords only)
fingerprint: "abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789"
# password the gateway uses to connect, made with oragono genpasswd
# password the gateway uses to connect, made with oragono genpasswd
password: "$2a$04$sLEFDpIOyUp55e6gTMKbOeroT6tMXTjPFvA0eGvwvImVR9pkwv7ee"
# addresses/CIDRs that can use this webirc command
@ -445,10 +446,20 @@ opers:
# modes are the modes to auto-set upon opering-up
modes: +is acjknoqtux
# password to login with /OPER command
# generated using "oragono genpasswd"
# operators can be authenticated either by password (with the /OPER command),
# or by certificate fingerprint, or both. if a password hash is set, then a
# password is required to oper up (e.g., /OPER dan mypassword). to generate
# the hash, use `oragono genpasswd`.
password: "$2a$04$LiytCxaY0lI.guDj2pBN4eLRD5cdM2OLDwqmGAgB6M2OPirbF5Jcu"
# if a SHA-256 certificate fingerprint is configured here, then it will be
# required to /OPER. if you comment out the password hash above, then you can
# /OPER without a password.
#fingerprint: "abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789"
# if 'auto' is set (and no password hash is set), operator permissions will be
# granted automatically as soon as you connect with the right fingerprint.
#auto: true
# logging, takes inspiration from Insp
logging:
-