diff options
Diffstat (limited to 'activesupport')
| -rw-r--r-- | activesupport/CHANGELOG.md | 5 | ||||
| -rw-r--r-- | activesupport/lib/active_support/core_ext/securerandom.rb | 47 | ||||
| -rw-r--r-- | activesupport/test/core_ext/securerandom_test.rb | 28 |
3 files changed, 80 insertions, 0 deletions
diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md index f65d9ea120..8f1eecf9fa 100644 --- a/activesupport/CHANGELOG.md +++ b/activesupport/CHANGELOG.md @@ -1,3 +1,8 @@ +* Add `SecureRandom::uuid_v3` and `SecureRandom::uuid_v5` to support stable + UUID fixtures on PostgreSQL. + + *Roderick van Domburg* + * `ActiveSupport::SafeBuffer#prepend` acts like `String#prepend` and modifies instance in-place, returning self. `ActiveSupport::SafeBuffer#prepend!` is deprecated. diff --git a/activesupport/lib/active_support/core_ext/securerandom.rb b/activesupport/lib/active_support/core_ext/securerandom.rb new file mode 100644 index 0000000000..fec8f7c0ec --- /dev/null +++ b/activesupport/lib/active_support/core_ext/securerandom.rb @@ -0,0 +1,47 @@ +module SecureRandom + UUID_DNS_NAMESPACE = "k\xA7\xB8\x10\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8" #:nodoc: + UUID_URL_NAMESPACE = "k\xA7\xB8\x11\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8" #:nodoc: + UUID_OID_NAMESPACE = "k\xA7\xB8\x12\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8" #:nodoc: + UUID_X500_NAMESPACE = "k\xA7\xB8\x14\x9D\xAD\x11\xD1\x80\xB4\x00\xC0O\xD40\xC8" #:nodoc: + + # 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: http://www.ietf.org/rfc/rfc4122.txt + 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 + + # Convenience method for ::uuid_from_hash using Digest::MD5. + def self.uuid_v3(uuid_namespace, name) + self.uuid_from_hash(Digest::MD5, uuid_namespace, name) + end + + # Convenience method for ::uuid_from_hash using Digest::SHA1. + def self.uuid_v5(uuid_namespace, name) + self.uuid_from_hash(Digest::SHA1, uuid_namespace, name) + end + + class << self + # Alias for ::uuid. + alias_method :uuid_v4, :uuid + end +end diff --git a/activesupport/test/core_ext/securerandom_test.rb b/activesupport/test/core_ext/securerandom_test.rb new file mode 100644 index 0000000000..71980f6910 --- /dev/null +++ b/activesupport/test/core_ext/securerandom_test.rb @@ -0,0 +1,28 @@ +require 'abstract_unit' +require 'active_support/core_ext/securerandom' + +class SecureRandomExt < ActiveSupport::TestCase + def test_v3_uuids + assert_equal "3d813cbb-47fb-32ba-91df-831e1593ac29", SecureRandom.uuid_v3(SecureRandom::UUID_DNS_NAMESPACE, "www.widgets.com") + assert_equal "86df55fb-428e-3843-8583-ba3c05f290bc", SecureRandom.uuid_v3(SecureRandom::UUID_URL_NAMESPACE, "http://www.widgets.com") + assert_equal "8c29ab0e-a2dc-3482-b5eb-20cb2e2387a1", SecureRandom.uuid_v3(SecureRandom::UUID_OID_NAMESPACE, "1.2.3") + assert_equal "ee49149d-53a4-304a-890b-468229f6afc3", SecureRandom.uuid_v3(SecureRandom::UUID_X500_NAMESPACE, "cn=John Doe, ou=People, o=Acme, Inc., c=US") + end + + def test_v5_uuids + assert_equal "21f7f8de-8051-5b89-8680-0195ef798b6a", SecureRandom.uuid_v5(SecureRandom::UUID_DNS_NAMESPACE, "www.widgets.com") + assert_equal "4e570fd8-186d-5a74-90f0-4d28e34673a1", SecureRandom.uuid_v5(SecureRandom::UUID_URL_NAMESPACE, "http://www.widgets.com") + assert_equal "42d5e23b-3a02-5135-85c6-52d1102f1f00", SecureRandom.uuid_v5(SecureRandom::UUID_OID_NAMESPACE, "1.2.3") + assert_equal "fd5b2ddf-bcfe-58b6-90d6-db50f74db527", SecureRandom.uuid_v5(SecureRandom::UUID_X500_NAMESPACE, "cn=John Doe, ou=People, o=Acme, Inc., c=US") + end + + def test_uuid_v4_alias + assert_equal SecureRandom.method(:uuid_v4), SecureRandom.method(:uuid) + end + + def test_invalid_hash_class + assert_raise ArgumentError do + SecureRandom.uuid_from_hash(Digest::SHA2, SecureRandom::UUID_OID_NAMESPACE, '1.2.3') + end + end +end |