diff --git a/vendor/github.com/xdg/stringprep/saslprep.go b/vendor/github.com/xdg/stringprep/saslprep.go
new file mode 100644
index 0000000..4001348
--- /dev/null
+++ b/vendor/github.com/xdg/stringprep/saslprep.go
@@ -0,0 +1,52 @@
+package stringprep
+
+var mapNonASCIISpaceToASCIISpace = Mapping{
+	0x00A0: []rune{0x0020},
+	0x1680: []rune{0x0020},
+	0x2000: []rune{0x0020},
+	0x2001: []rune{0x0020},
+	0x2002: []rune{0x0020},
+	0x2003: []rune{0x0020},
+	0x2004: []rune{0x0020},
+	0x2005: []rune{0x0020},
+	0x2006: []rune{0x0020},
+	0x2007: []rune{0x0020},
+	0x2008: []rune{0x0020},
+	0x2009: []rune{0x0020},
+	0x200A: []rune{0x0020},
+	0x200B: []rune{0x0020},
+	0x202F: []rune{0x0020},
+	0x205F: []rune{0x0020},
+	0x3000: []rune{0x0020},
+}
+
+// SASLprep is a pre-defined stringprep profile for user names and passwords
+// as described in RFC-4013.
+//
+// Because the stringprep distinction between query and stored strings was
+// intended for compatibility across profile versions, but SASLprep was never
+// updated and is now deprecated, this profile only operates in stored
+// strings mode, prohibiting unassigned code points.
+var SASLprep Profile = saslprep
+
+var saslprep = Profile{
+	Mappings: []Mapping{
+		TableB1,
+		mapNonASCIISpaceToASCIISpace,
+	},
+	Normalize: true,
+	Prohibits: []Set{
+		TableA1,
+		TableC1_2,
+		TableC2_1,
+		TableC2_2,
+		TableC3,
+		TableC4,
+		TableC5,
+		TableC6,
+		TableC7,
+		TableC8,
+		TableC9,
+	},
+	CheckBiDi: true,
+}