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-rw-r--r--vendor/github.com/pborman/uuid/hash.go53
1 files changed, 53 insertions, 0 deletions
diff --git a/vendor/github.com/pborman/uuid/hash.go b/vendor/github.com/pborman/uuid/hash.go
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+++ b/vendor/github.com/pborman/uuid/hash.go
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+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+ "crypto/md5"
+ "crypto/sha1"
+ "hash"
+)
+
+// Well known Name Space IDs and UUIDs
+var (
+ NameSpace_DNS = Parse("6ba7b810-9dad-11d1-80b4-00c04fd430c8")
+ NameSpace_URL = Parse("6ba7b811-9dad-11d1-80b4-00c04fd430c8")
+ NameSpace_OID = Parse("6ba7b812-9dad-11d1-80b4-00c04fd430c8")
+ NameSpace_X500 = Parse("6ba7b814-9dad-11d1-80b4-00c04fd430c8")
+ NIL = Parse("00000000-0000-0000-0000-000000000000")
+)
+
+// NewHash returns a new UUID derived from the hash of space concatenated with
+// data generated by h. The hash should be at least 16 byte in length. The
+// first 16 bytes of the hash are used to form the UUID. The version of the
+// UUID will be the lower 4 bits of version. NewHash is used to implement
+// NewMD5 and NewSHA1.
+func NewHash(h hash.Hash, space UUID, data []byte, version int) UUID {
+ h.Reset()
+ h.Write(space)
+ h.Write([]byte(data))
+ s := h.Sum(nil)
+ uuid := make([]byte, 16)
+ copy(uuid, s)
+ uuid[6] = (uuid[6] & 0x0f) | uint8((version&0xf)<<4)
+ uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 4122 variant
+ return uuid
+}
+
+// NewMD5 returns a new MD5 (Version 3) UUID based on the
+// supplied name space and data.
+//
+// NewHash(md5.New(), space, data, 3)
+func NewMD5(space UUID, data []byte) UUID {
+ return NewHash(md5.New(), space, data, 3)
+}
+
+// NewSHA1 returns a new SHA1 (Version 5) UUID based on the
+// supplied name space and data.
+//
+// NewHash(sha1.New(), space, data, 5)
+func NewSHA1(space UUID, data []byte) UUID {
+ return NewHash(sha1.New(), space, data, 5)
+}