MM-24484 allow base64 certs in config for TLS Syslog (#14445)

vendor/github.com/RackSec/srslog/.travis.yml

@@ -1,18 +0,0 @@
-sudo: required
-dist: trusty
-group: edge
-language: go
-go:
-- 1.5
-before_install:
-  - pip install --user codecov
-script:
-- |
-  go get ./...
-  go test -v -coverprofile=coverage.txt -covermode=atomic
-  go vet
-after_success:
-  - codecov
-notifications:
-  slack:
-    secure: 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

vendor/github.com/RackSec/srslog/net_conn.go

@@ -1,30 +0,0 @@
-package srslog
-
-import (
-	"net"
-)
-
-// netConn has an internal net.Conn and adheres to the serverConn interface,
-// allowing us to send syslog messages over the network.
-type netConn struct {
-	conn net.Conn
-}
-
-// writeString formats syslog messages using time.RFC3339 and includes the
-// hostname, and sends the message to the connection.
-func (n *netConn) writeString(framer Framer, formatter Formatter, p Priority, hostname, tag, msg string) error {
-	if framer == nil {
-		framer = DefaultFramer
-	}
-	if formatter == nil {
-		formatter = DefaultFormatter
-	}
-	formattedMessage := framer(formatter(p, hostname, tag, msg))
-	_, err := n.conn.Write([]byte(formattedMessage))
-	return err
-}
-
-// close the network connection
-func (n *netConn) close() error {
-	return n.conn.Close()
-}

vendor/github.com/armon/go-metrics/go.mod

@@ -6,12 +6,14 @@ require (
 	github.com/DataDog/datadog-go v3.2.0+incompatible
 	github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible
 	github.com/circonus-labs/circonusllhist v0.1.3 // indirect
-	github.com/golang/protobuf v1.3.2
+	github.com/golang/protobuf v1.2.0
 	github.com/hashicorp/go-immutable-radix v1.0.0
 	github.com/hashicorp/go-retryablehttp v0.5.3 // indirect
 	github.com/pascaldekloe/goe v0.1.0
-	github.com/prometheus/client_golang v1.4.0
-	github.com/prometheus/client_model v0.2.0
-	github.com/prometheus/common v0.9.1
+	github.com/pkg/errors v0.8.1 // indirect
+	github.com/prometheus/client_golang v0.9.2
+	github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910
+	github.com/prometheus/common v0.0.0-20181126121408-4724e9255275
+	github.com/stretchr/testify v1.3.0 // indirect
 	github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 // indirect
 )

vendor/github.com/armon/go-metrics/go.sum

@@ -1,39 +1,15 @@
 github.com/DataDog/datadog-go v3.2.0+incompatible h1:qSG2N4FghB1He/r2mFrWKCaL7dXCilEuNEeAn20fdD4=
 github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
-github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
-github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
-github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible h1:C29Ae4G5GtYyYMm1aztcyj/J5ckgJm2zwdDajFbx1NY=
 github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
 github.com/circonus-labs/circonusllhist v0.1.3 h1:TJH+oke8D16535+jHExHj4nQvzlZrj7ug5D7I/orNUA=
 github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
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-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
-github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
-github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
-github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
-github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
-github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
-github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
-github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/hashicorp/go-cleanhttp v0.5.0 h1:wvCrVc9TjDls6+YGAF2hAifE1E5U1+b4tH6KdvN3Gig=
 github.com/hashicorp/go-cleanhttp v0.5.0/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
 github.com/hashicorp/go-immutable-radix v1.0.0 h1:AKDB1HM5PWEA7i4nhcpwOrO2byshxBjXVn/J/3+z5/0=
@@ -44,82 +20,28 @@ github.com/hashicorp/go-uuid v1.0.0 h1:RS8zrF7PhGwyNPOtxSClXXj9HA8feRnJzgnI1RJCS
 github.com/hashicorp/go-uuid v1.0.0/go.mod h1:6SBZvOh/SIDV7/2o3Jml5SYk/TvGqwFJ/bN7x4byOro=
 github.com/hashicorp/golang-lru v0.5.0 h1:CL2msUPvZTLb5O648aiLNJw3hnBxN2+1Jq8rCOH9wdo=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
-github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
-github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
-github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
-github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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-github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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-golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f h1:Bl/8QSvNqXvPGPGXa2z5xUTmV7VDcZyvRZ+QQXkXTZQ=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200122134326-e047566fdf82 h1:ywK/j/KkyTHcdyYSZNXGjMwgmDSfjglYZ3vStQ/gSCU=
-golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c=
-gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

vendor/github.com/armon/go-metrics/inmem.go

@@ -10,8 +10,6 @@ import (
 	"time"
 )
 
-var spaceReplacer = strings.NewReplacer(" ", "_")
-
 // InmemSink provides a MetricSink that does in-memory aggregation
 // without sending metrics over a network. It can be embedded within
 // an application to provide profiling information.
@@ -314,21 +312,36 @@ func (i *InmemSink) getInterval() *IntervalMetrics {
 // Flattens the key for formatting, removes spaces
 func (i *InmemSink) flattenKey(parts []string) string {
 	buf := &bytes.Buffer{}
+	replacer := strings.NewReplacer(" ", "_")
 
-	joined := strings.Join(parts, ".")
-
-	spaceReplacer.WriteString(buf, joined)
+	if len(parts) > 0 {
+		replacer.WriteString(buf, parts[0])
+	}
+	for _, part := range parts[1:] {
+		replacer.WriteString(buf, ".")
+		replacer.WriteString(buf, part)
+	}
 
 	return buf.String()
 }
 
 // Flattens the key for formatting along with its labels, removes spaces
 func (i *InmemSink) flattenKeyLabels(parts []string, labels []Label) (string, string) {
-	key := i.flattenKey(parts)
-	buf := bytes.NewBufferString(key)
+	buf := &bytes.Buffer{}
+	replacer := strings.NewReplacer(" ", "_")
+
+	if len(parts) > 0 {
+		replacer.WriteString(buf, parts[0])
+	}
+	for _, part := range parts[1:] {
+		replacer.WriteString(buf, ".")
+		replacer.WriteString(buf, part)
+	}
+
+	key := buf.String()
 
 	for _, label := range labels {
-		spaceReplacer.WriteString(buf, fmt.Sprintf(";%s=%s", label.Name, label.Value))
+		replacer.WriteString(buf, fmt.Sprintf(";%s=%s", label.Name, label.Value))
 	}
 
 	return buf.String(), key

vendor/github.com/armon/go-metrics/metrics.go

@@ -269,25 +269,10 @@ func (m *Metrics) emitRuntimeStats() {
 	m.lastNumGC = num
 }
 
-// Creates a new slice with the provided string value as the first element
-// and the provided slice values as the remaining values.
-// Ordering of the values in the provided input slice is kept in tact in the output slice.
+// Inserts a string value at an index into the slice
 func insert(i int, v string, s []string) []string {
-	// Allocate new slice to avoid modifying the input slice
-	newS := make([]string, len(s)+1)
-
-	// Copy s[0, i-1] into newS
-	for j := 0; j < i; j++ {
-		newS[j] = s[j]
-	}
-
-	// Insert provided element at index i
-	newS[i] = v
-
-	// Copy s[i, len(s)-1] into newS starting at newS[i+1]
-	for j := i; j < len(s); j++ {
-		newS[j+1] = s[j]
-	}
-
-	return newS
+	s = append(s, "")
+	copy(s[i+1:], s[i:])
+	s[i] = v
+	return s
 }

vendor/github.com/wiggin77/srslog/.travis.yml

@@ -0,0 +1,15 @@
+sudo: required
+dist: trusty
+group: edge
+language: go
+go:
+- 1.5
+before_install:
+  - pip install --user codecov
+script:
+- |
+  go get ./...
+  go test -v -coverprofile=coverage.txt -covermode=atomic
+  go vet
+after_success:
+  - codecov

vendor/github.com/wiggin77/srslog/dialer.go

@@ -64,7 +64,7 @@ func (w *Writer) tlsDialer() (serverConn, string, error) {
 	var sc serverConn
 	hostname := w.hostname
 	if err == nil {
-		sc = &netConn{conn: c}
+		sc = newNetConn(c)
 		if hostname == "" {
 			hostname = c.LocalAddr().String()
 		}
@@ -79,7 +79,7 @@ func (w *Writer) basicDialer() (serverConn, string, error) {
 	var sc serverConn
 	hostname := w.hostname
 	if err == nil {
-		sc = &netConn{conn: c}
+		sc = newNetConn(c)
 		if hostname == "" {
 			hostname = c.LocalAddr().String()
 		}
@@ -95,7 +95,7 @@ func (w *Writer) customDialer() (serverConn, string, error) {
 	var sc serverConn
 	hostname := w.hostname
 	if err == nil {
-		sc = &netConn{conn: c}
+		sc = newNetConn(c)
 		if hostname == "" {
 			hostname = c.LocalAddr().String()
 		}

vendor/github.com/wiggin77/srslog/go.mod

@@ -0,0 +1,3 @@
+module github.com/wiggin77/srslog
+
+go 1.14

vendor/github.com/wiggin77/srslog/logger.go

@@ -0,0 +1,13 @@
+package srslog
+
+import (
+	"io/ioutil"
+	"log"
+)
+
+var Logger log.Logger
+
+func init() {
+	Logger = log.Logger{}
+	Logger.SetOutput(ioutil.Discard)
+}

vendor/github.com/wiggin77/srslog/net_conn.go

@@ -0,0 +1,76 @@
+package srslog
+
+import (
+	"io"
+	"net"
+	"time"
+)
+
+// netConn has an internal net.Conn and adheres to the serverConn interface,
+// allowing us to send syslog messages over the network.
+type netConn struct {
+	conn net.Conn
+	done chan interface{}
+}
+
+// newNetConn creates a netConn instance that is monitored for unexpected socket closure.
+func newNetConn(conn net.Conn) *netConn {
+	nc := &netConn{conn: conn, done: make(chan interface{})}
+	go monitor(nc.conn, nc.done)
+	return nc
+}
+
+// writeString formats syslog messages using time.RFC3339 and includes the
+// hostname, and sends the message to the connection.
+func (n *netConn) writeString(framer Framer, formatter Formatter, p Priority, hostname, tag, msg string) error {
+	if framer == nil {
+		framer = DefaultFramer
+	}
+	if formatter == nil {
+		formatter = DefaultFormatter
+	}
+	formattedMessage := framer(formatter(p, hostname, tag, msg))
+	_, err := n.conn.Write([]byte(formattedMessage))
+	return err
+}
+
+// close the network connection
+func (n *netConn) close() error {
+	// signal monitor goroutine to exit
+	close(n.done)
+	// wake up monitor blocked on read (close usually is enough)
+	_ = n.conn.SetReadDeadline(time.Now())
+	// close the connection
+	return n.conn.Close()
+}
+
+// monitor continuously tries to read from the connection to detect socket close.
+// This is needed because syslog server uses a write only socket and Linux systems
+// take a long time to detect a loss of connectivity on a socket when only writing;
+// the writes simply fail without an error returned.
+func monitor(conn net.Conn, done chan interface{}) {
+	defer Logger.Println("monitor exit")
+
+	buf := make([]byte, 1)
+	for {
+		Logger.Println("monitor loop")
+
+		select {
+		case <-done:
+			return
+		case <-time.After(1 * time.Second):
+		}
+
+		err := conn.SetReadDeadline(time.Now().Add(time.Second * 30))
+		if err != nil {
+			continue
+		}
+
+		_, err = conn.Read(buf)
+		Logger.Println("monitor -- ", err)
+		if err == io.EOF {
+			Logger.Println("monitor close conn")
+			conn.Close()
+		}
+	}
+}