From e4f8f8907c8d04c54acf7791947295f8d9abf959 Mon Sep 17 00:00:00 2001 From: akr Date: Thu, 14 Nov 2013 10:58:15 +0000 Subject: * test/openssl/test_cipher.rb (test_aes_gcm_wrong_tag): Don't use String#succ because it can make modified (wrong) auth_tag longer than 16 bytes. The longer auth_tag makes that EVP_CIPHER_CTX_ctrl (and internally aes_gcm_ctrl) fail. [ruby-core:55143] [Bug #8439] reported by Vit Ondruch. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43676 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- test/openssl/test_cipher.rb | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'test/openssl/test_cipher.rb') diff --git a/test/openssl/test_cipher.rb b/test/openssl/test_cipher.rb index 088dbc140d..156fa2a9c9 100644 --- a/test/openssl/test_cipher.rb +++ b/test/openssl/test_cipher.rb @@ -187,7 +187,8 @@ class OpenSSL::TestCipher < Test::Unit::TestCase tag = cipher.auth_tag decipher = new_decryptor('aes-128-gcm', key, iv) - decipher.auth_tag = tag[0..-2] << tag[-1].succ + tag.setbyte(-1, (tag.getbyte(-1) + 1) & 0xff) + decipher.auth_tag = tag decipher.auth_data = "aad" assert_raise OpenSSL::Cipher::CipherError do -- cgit v1.2.3