From: im@... Date: 2017-05-26T13:54:27+00:00 Subject: [ruby-core:81392] [Ruby trunk Bug#10093] SecureRandom.uuid is not valid v4 or RFC 4122 Issue #10093 has been updated by kulikov-im (Evgeniy Kulikov). Subject changed from SecureRandom.uuid is unstable to SecureRandom.uuid is not valid v4 or RFC 4122 ruby -v changed from ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin13.0] to ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin16] https://www.ietf.org/rfc/rfc4122.txt (#4.4) --- current test is https://github.com/ruby/ruby/blob/ruby_2_4/test/test_securerandom.rb#L174 ```ruby def test_uuid uuid = @it.uuid assert_equal(36, uuid.size) assert_match(/\A\h{8}-\h{4}-\h{4}-\h{4}-\h{12}\z/, uuid) end ``` thats not valid Here Golang example of test-case - https://github.com/satori/go.uuid/blob/master/uuid_test.go#L589 must check: - UUID Version ```ruby uuid.bytes[6] >> 4 == 4 ``` - RFC4122 ```ruby (uuid.bytes[8] & 0xc0) | 0x80 == 0x80 ``` valid test-case is: ```ruby def test_uuid uuid = @it.uuid assert_equal(36, uuid.size) # Check UUID Version: assert_equal(uuid.bytes[6] >> 4, 4) # Check RFC4122 assert_equal((uuid[8] & 0xc0) | 0x80, 0x80) assert_match(/\A\h{8}-\h{4}-\h{4}-\h{4}-\h{12}\z/, uuid) end ``` ---------------------------------------- Bug #10093: SecureRandom.uuid is not valid v4 or RFC 4122 https://bugs.ruby-lang.org/issues/10093#change-65105 * Author: kidlab (Man Vuong) * Status: Third Party's Issue * Priority: Normal * Assignee: * Target version: 2.2.0 * ruby -v: ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin16] * Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN ---------------------------------------- SecureRandom.uuid sometimes generates some value like this: e7be09bb-e939-43db-9c20-dfad9c27fd3g And it's not a valid UUID. This problem occurred randomly for me, I don't know how to reproduce :( -- https://bugs.ruby-lang.org/ Unsubscribe: