Module: Digest::UUID
- Defined in:
- lib/active_support/core_ext/digest/uuid.rb
Constant Summary collapse
- DNS_NAMESPACE =
:nodoc:
"k\xA7\xB8\x10\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8"
- URL_NAMESPACE =
:nodoc:
"k\xA7\xB8\x11\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8"
- OID_NAMESPACE =
:nodoc:
"k\xA7\xB8\x12\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8"
- X500_NAMESPACE =
:nodoc:
"k\xA7\xB8\x14\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8"
Class Method Summary collapse
-
.uuid_from_hash(hash_class, uuid_namespace, name) ⇒ Object
Generates a v5 non-random UUID (Universally Unique IDentifier).
-
.uuid_v3(uuid_namespace, name) ⇒ Object
Convenience method for uuid_from_hash using Digest::MD5.
-
.uuid_v4 ⇒ Object
Convenience method for SecureRandom.uuid.
-
.uuid_v5(uuid_namespace, name) ⇒ Object
Convenience method for uuid_from_hash using Digest::SHA1.
Class Method Details
.uuid_from_hash(hash_class, uuid_namespace, name) ⇒ Object
Generates a v5 non-random UUID (Universally Unique IDentifier).
Using Digest::MD5 generates version 3 UUIDs; Digest::SHA1 generates version 5 UUIDs. uuid_from_hash always generates the same UUID for a given name and namespace combination.
See RFC 4122 for details of UUID at: www.ietf.org/rfc/rfc4122.txt
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 |
# File 'lib/active_support/core_ext/digest/uuid.rb', line 16 def self.uuid_from_hash(hash_class, uuid_namespace, name) if hash_class == Digest::MD5 version = 3 elsif hash_class == Digest::SHA1 version = 5 else raise ArgumentError, "Expected Digest::SHA1 or Digest::MD5, got #{hash_class.name}." end hash = hash_class.new hash.update(uuid_namespace) hash.update(name) ary = hash.digest.unpack('NnnnnN') ary[2] = (ary[2] & 0x0FFF) | (version << 12) ary[3] = (ary[3] & 0x3FFF) | 0x8000 "%08x-%04x-%04x-%04x-%04x%08x" % ary end |
.uuid_v3(uuid_namespace, name) ⇒ Object
Convenience method for uuid_from_hash using Digest::MD5.
37 38 39 |
# File 'lib/active_support/core_ext/digest/uuid.rb', line 37 def self.uuid_v3(uuid_namespace, name) self.uuid_from_hash(Digest::MD5, uuid_namespace, name) end |
.uuid_v4 ⇒ Object
Convenience method for SecureRandom.uuid.
47 48 49 |
# File 'lib/active_support/core_ext/digest/uuid.rb', line 47 def self.uuid_v4 SecureRandom.uuid end |