3 files changed, 28 insertions, 21 deletions
diff --git a/vendor/github.com/rs/xid/.golangci.yml b/vendor/github.com/rs/xid/.golangci.yml
new file mode 100644
index 00000000..7929600a
--- /dev/null
+++ b/vendor/github.com/rs/xid/.golangci.yml
@@ -0,0 +1,5 @@
+run:
+  tests: false
+
+output:
+  sort-results: true
diff --git a/vendor/github.com/rs/xid/README.md b/vendor/github.com/rs/xid/README.md
index 5bf462e8..974e67d2 100644
--- a/vendor/github.com/rs/xid/README.md
+++ b/vendor/github.com/rs/xid/README.md
@@ -70,6 +70,9 @@ References:
 - Ruby port by [Valar](https://github.com/valarpirai/): https://github.com/valarpirai/ruby_xid
 - Java port by [0xShamil](https://github.com/0xShamil/): https://github.com/0xShamil/java-xid
 - Dart port by [Peter Bwire](https://github.com/pitabwire): https://pub.dev/packages/xid
+- PostgreSQL port by [Rasmus Holm](https://github.com/crholm): https://github.com/modfin/pg-xid
+- Swift port by [Uditha Atukorala](https://github.com/uditha-atukorala): https://github.com/uditha-atukorala/swift-xid
+- C++ port by [Uditha Atukorala](https://github.com/uditha-atukorala): https://github.com/uditha-atukorala/libxid
 
 ## Install
 
diff --git a/vendor/github.com/rs/xid/id.go b/vendor/github.com/rs/xid/id.go
index 1f536b41..fcd7a041 100644
--- a/vendor/github.com/rs/xid/id.go
+++ b/vendor/github.com/rs/xid/id.go
@@ -43,7 +43,7 @@ package xid
 
 import (
 	"bytes"
-	"crypto/md5"
+	"crypto/sha256"
 	"crypto/rand"
 	"database/sql/driver"
 	"encoding/binary"
@@ -72,13 +72,11 @@ const (
 )
 
 var (
-	// objectIDCounter is atomically incremented when generating a new ObjectId
-	// using NewObjectId() function. It's used as a counter part of an id.
-	// This id is initialized with a random value.
+	// objectIDCounter is atomically incremented when generating a new ObjectId. It's
+	// used as the counter part of an id. This id is initialized with a random value.
 	objectIDCounter = randInt()
 
-	// machineId stores machine id generated once and used in subsequent calls
-	// to NewObjectId function.
+	// machineID is generated once and used in subsequent calls to the New* functions.
 	machineID = readMachineID()
 
 	// pid stores the current process id
@@ -107,9 +105,9 @@ func init() {
 	}
 }
 
-// readMachineId generates machine id and puts it into the machineId global
-// variable. If this function fails to get the hostname, it will cause
-// a runtime error.
+// readMachineID generates a machine ID, derived from a platform-specific machine ID
+// value, or else the machine's hostname, or else a randomly-generated number.
+// It panics if all of these methods fail.
 func readMachineID() []byte {
 	id := make([]byte, 3)
 	hid, err := readPlatformMachineID()
@@ -117,7 +115,7 @@ func readMachineID() []byte {
 		hid, err = os.Hostname()
 	}
 	if err == nil && len(hid) != 0 {
-		hw := md5.New()
+		hw := sha256.New()
 		hw.Write([]byte(hid))
 		copy(id, hw.Sum(nil))
 	} else {
@@ -148,7 +146,7 @@ func NewWithTime(t time.Time) ID {
 	var id ID
 	// Timestamp, 4 bytes, big endian
 	binary.BigEndian.PutUint32(id[:], uint32(t.Unix()))
-	// Machine, first 3 bytes of md5(hostname)
+	// Machine ID, 3 bytes
 	id[4] = machineID[0]
 	id[5] = machineID[1]
 	id[6] = machineID[2]
@@ -239,6 +237,7 @@ func (id *ID) UnmarshalText(text []byte) error {
 		}
 	}
 	if !decode(id, text) {
+		*id = nilID
 		return ErrInvalidID
 	}
 	return nil
@@ -264,6 +263,10 @@ func decode(id *ID, src []byte) bool {
 	_ = id[11]
 
 	id[11] = dec[src[17]]<<6 | dec[src[18]]<<1 | dec[src[19]]>>4
+	// check the last byte
+	if encoding[(id[11]<<4)&0x1F] != src[19] {
+		return false
+	}
 	id[10] = dec[src[16]]<<3 | dec[src[17]]>>2
 	id[9] = dec[src[14]]<<5 | dec[src[15]]
 	id[8] = dec[src[12]]<<7 | dec[src[13]]<<2 | dec[src[14]]>>3
@@ -275,16 +278,7 @@ func decode(id *ID, src []byte) bool {
 	id[2] = dec[src[3]]<<4 | dec[src[4]]>>1
 	id[1] = dec[src[1]]<<6 | dec[src[2]]<<1 | dec[src[3]]>>4
 	id[0] = dec[src[0]]<<3 | dec[src[1]]>>2
-
-	// Validate that there are no discarer bits (padding) in src that would
-	// cause the string-encoded id not to equal src.
-	var check [4]byte
-
-	check[3] = encoding[(id[11]<<4)&0x1F]
-	check[2] = encoding[(id[11]>>1)&0x1F]
-	check[1] = encoding[(id[11]>>6)&0x1F|(id[10]<<2)&0x1F]
-	check[0] = encoding[id[10]>>3]
-	return bytes.Equal([]byte(src[16:20]), check[:])
+	return true
 }
 
 // Time returns the timestamp part of the id.
@@ -344,6 +338,11 @@ func (id ID) IsNil() bool {
 	return id == nilID
 }
 
+// Alias of IsNil
+func (id ID) IsZero() bool {
+	return id.IsNil()
+}
+
 // NilID returns a zero value for `xid.ID`.
 func NilID() ID {
 	return nilID