From owner-freebsd-questions@freebsd.org Sat Oct 24 03:53:39 2015 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0E93AA1B7B1 for ; Sat, 24 Oct 2015 03:53:39 +0000 (UTC) (envelope-from ike@michaeleichorn.com) Received: from mx1.eichornenterprises.com (mx1.eichornenterprises.com [104.236.13.122]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mx1.eichornenterprises.com", Issuer "StartCom Class 1 Primary Intermediate Server CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id BE06DC93 for ; Sat, 24 Oct 2015 03:53:38 +0000 (UTC) (envelope-from ike@michaeleichorn.com) Received: from mail.eichornenterprises.com (cpe-75-179-47-202.neo.res.rr.com [75.179.47.202]) by mx1.eichornenterprises.com (OpenSMTPD) with ESMTP id 422969ba; Fri, 23 Oct 2015 23:53:33 -0400 (EDT) Received: by mail.eichornenterprises.com (OpenSMTPD) with ESMTPSA id a73f8045; TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO; Fri, 23 Oct 2015 23:53:33 -0400 (EDT) Message-ID: <1445658972.13154.44.camel@michaeleichorn.com> Subject: Re: replace uname -a informational string From: "Michael B. Eichorn" To: Erich Dollansky , "O. Hartmann" Cc: freebsd-questions Date: Fri, 23 Oct 2015 23:56:12 -0400 In-Reply-To: <20151024080936.0ff26783@X220.alogt.com> References: <20151023090805.5484ce9b@freyja.zeit4.iv.bundesimmobilien.de> <1445622325.1169.29.camel@michaeleichorn.com> <20151023225424.49220466.ohartman@zedat.fu-berlin.de> <20151024080936.0ff26783@X220.alogt.com> Content-Type: multipart/signed; micalg="sha-512"; protocol="application/x-pkcs7-signature"; boundary="=-7JJGn9BKVa4rccJ2V/l5" X-Mailer: Evolution 3.16.5 Mime-Version: 1.0 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 24 Oct 2015 03:53:39 -0000 --=-7JJGn9BKVa4rccJ2V/l5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, 2015-10-24 at 08:09 +0800, Erich Dollansky wrote: > Hi, >=20 > On Fri, 23 Oct 2015 22:54:24 +0200 > "O. Hartmann" wrote: >=20 > > Am Fri, 23 Oct 2015 13:45:25 -0400 > > "Michael B. Eichorn" schrieb: > >=20 > >=20 > > First of all: Thank you very much for your concerns and answers. > >=20 > > > On Fri, 2015-10-23 at 09:08 +0200, O. Hartmann wrote: > > > > For security purposes, I need to replace the informations given > > > > by > > > > "uname -a" > > > > to hode the kernel build system, name et cetera. =20 > > >=20 > > > I presume you intendend 'hide' here? > > >=20 > > > If you want to scrub a binaries of _all_ information about the > > > building system this is a problem Debian is actively working on > > > called 'reproducible builds' but is not possible today. > > >=20 > > > https://reproducible.debian.net > > >=20 > > > If you want to hide the hostname, why not just build with a > > > different hostname set? > >=20 > > Because it is not only the hostname, uname reveals the target host, > > date and OS version. > >=20 > > In our case, the image ist built on a dedicated host for a security > > appliabce based on NanoBSD and I'd like to hide the OS type, the OS > > name, the build box' name and the build date.=20 > >=20 > why not replace uname at the source level then? >=20 > Erich That wouldn't hide the information in any substantial way. Uname is basically an abstraction of a subset of sysctls. As such, the information is integral to the kernel itself. Uname is just one of many tools that can be used to display this information. Fundamentally the kernel itself needs to be changed not uname. --=-7JJGn9BKVa4rccJ2V/l5 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCCEqAw ggYwMIIFGKADAgECAgMOXcYwDQYJKoZIhvcNAQELBQAwgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQK Ew1TdGFydENvbSBMdGQuMSswKQYDVQQLEyJTZWN1cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWdu aW5nMTgwNgYDVQQDEy9TdGFydENvbSBDbGFzcyAxIFByaW1hcnkgSW50ZXJtZWRpYXRlIENsaWVu dCBDQTAeFw0xNTA2MTMyMDI0NDZaFw0xNjA2MTQwMDM1NTBaMEgxHzAdBgNVBAMMFmlrZUBtaWNo YWVsZWljaG9ybi5jb20xJTAjBgkqhkiG9w0BCQEWFmlrZUBtaWNoYWVsZWljaG9ybi5jb20wggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDJVdWALPz5h2s5zUQGIJYl6Vp8FPtZNko8q/3s crCsxXJLprMaDdpnqTsmkbmEfKvsqPQE6HVOpGxVRTl/tCm+VvouW9eY9ITMigb1OnHdU13CKO0j drgeU1nHst0qxwsIofRD7nC4dakT6exnrVndlBmLrf/bLPh2qOM8YK5qKK6m33fE7AyYrwiYAWFT 3fERI7LakjaabrIoS/Y1rCdL5FaCTMOlRbZyduc8HkrgjT2JW+i4fVcKyGL5gExBJWfS3q1uGFaB ie6pYtl8lZPtvN0JSfibP003RBoLgzqHJKW91RL0qNeDjKZi/5nrlU398l9UoVvLLO3KxoPBXKCx AgMBAAGjggLcMIIC2DAJBgNVHRMEAjAAMAsGA1UdDwQEAwIEsDAdBgNVHSUEFjAUBggrBgEFBQcD AgYIKwYBBQUHAwQwHQYDVR0OBBYEFJZqarc6CcrOs6eAwOgrMznk5ZWWMB8GA1UdIwQYMBaAFFNy 7ZKc4NrLAVx8fpY1TvLUuFGCMCEGA1UdEQQaMBiBFmlrZUBtaWNoYWVsZWljaG9ybi5jb20wggFM BgNVHSAEggFDMIIBPzCCATsGCysGAQQBgbU3AQIDMIIBKjAuBggrBgEFBQcCARYiaHR0cDovL3d3 dy5zdGFydHNzbC5jb20vcG9saWN5LnBkZjCB9wYIKwYBBQUHAgIwgeowJxYgU3RhcnRDb20gQ2Vy dGlmaWNhdGlvbiBBdXRob3JpdHkwAwIBARqBvlRoaXMgY2VydGlmaWNhdGUgd2FzIGlzc3VlZCBh Y2NvcmRpbmcgdG8gdGhlIENsYXNzIDEgVmFsaWRhdGlvbiByZXF1aXJlbWVudHMgb2YgdGhlIFN0 YXJ0Q29tIENBIHBvbGljeSwgcmVsaWFuY2Ugb25seSBmb3IgdGhlIGludGVuZGVkIHB1cnBvc2Ug aW4gY29tcGxpYW5jZSBvZiB0aGUgcmVseWluZyBwYXJ0eSBvYmxpZ2F0aW9ucy4wNgYDVR0fBC8w LTAroCmgJ4YlaHR0cDovL2NybC5zdGFydHNzbC5jb20vY3J0dTEtY3JsLmNybDCBjgYIKwYBBQUH AQEEgYEwfzA5BggrBgEFBQcwAYYtaHR0cDovL29jc3Auc3RhcnRzc2wuY29tL3N1Yi9jbGFzczEv Y2xpZW50L2NhMEIGCCsGAQUFBzAChjZodHRwOi8vYWlhLnN0YXJ0c3NsLmNvbS9jZXJ0cy9zdWIu Y2xhc3MxLmNsaWVudC5jYS5jcnQwIwYDVR0SBBwwGoYYaHR0cDovL3d3dy5zdGFydHNzbC5jb20v MA0GCSqGSIb3DQEBCwUAA4IBAQB4K8iQw+0FRn3xEnB3vIIu2Vi4C3ZGnOMWP90FFXLrZ6uAu9AK xVCjXUVP6nAEsOopTMu769vVecdBvg0KO2i5aTDTdTLX4g9d020g4OLWW1NiynAkX8oKqJLqZ53q vHK4zP4KWPS3bSqDWVCosTMfI+H6tkg+6G3gS0HHoHTLKZhIT3z6PQZAfeofM7ed6NOdAcj0J2lP ODHzzz7Y9x4wMwYJdidorzUDVYkNIkim8ak7hK9F60NadA5w/BirFATSlzRyV0h1tl6oNisEaQcq tGvy6UoCTDhzaJ7pQValfDXJ/A47P0hNj/CX/PmkY1wQHsEJz2pbh5lqteP/fO0rMIIGMDCCBRig AwIBAgIDDl3GMA0GCSqGSIb3DQEBCwUAMIGMMQswCQYDVQQGEwJJTDEWMBQGA1UEChMNU3RhcnRD b20gTHRkLjErMCkGA1UECxMiU2VjdXJlIERpZ2l0YWwgQ2VydGlmaWNhdGUgU2lnbmluZzE4MDYG A1UEAxMvU3RhcnRDb20gQ2xhc3MgMSBQcmltYXJ5IEludGVybWVkaWF0ZSBDbGllbnQgQ0EwHhcN MTUwNjEzMjAyNDQ2WhcNMTYwNjE0MDAzNTUwWjBIMR8wHQYDVQQDDBZpa2VAbWljaGFlbGVpY2hv cm4uY29tMSUwIwYJKoZIhvcNAQkBFhZpa2VAbWljaGFlbGVpY2hvcm4uY29tMIIBIjANBgkqhkiG 9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyVXVgCz8+YdrOc1EBiCWJelafBT7WTZKPKv97HKwrMVyS6az Gg3aZ6k7JpG5hHyr7Kj0BOh1TqRsVUU5f7Qpvlb6LlvXmPSEzIoG9Tpx3VNdwijtI3a4HlNZx7Ld KscLCKH0Q+5wuHWpE+nsZ61Z3ZQZi63/2yz4dqjjPGCuaiiupt93xOwMmK8ImAFhU93xESOy2pI2 mm6yKEv2NawnS+RWgkzDpUW2cnbnPB5K4I09iVvouH1XCshi+YBMQSVn0t6tbhhWgYnuqWLZfJWT 7bzdCUn4mz9NN0QaC4M6hySlvdUS9KjXg4ymYv+Z65VN/fJfVKFbyyztysaDwVygsQIDAQABo4IC 3DCCAtgwCQYDVR0TBAIwADALBgNVHQ8EBAMCBLAwHQYDVR0lBBYwFAYIKwYBBQUHAwIGCCsGAQUF BwMEMB0GA1UdDgQWBBSWamq3OgnKzrOngMDoKzM55OWVljAfBgNVHSMEGDAWgBRTcu2SnODaywFc fH6WNU7y1LhRgjAhBgNVHREEGjAYgRZpa2VAbWljaGFlbGVpY2hvcm4uY29tMIIBTAYDVR0gBIIB QzCCAT8wggE7BgsrBgEEAYG1NwECAzCCASowLgYIKwYBBQUHAgEWImh0dHA6Ly93d3cuc3RhcnRz c2wuY29tL3BvbGljeS5wZGYwgfcGCCsGAQUFBwICMIHqMCcWIFN0YXJ0Q29tIENlcnRpZmljYXRp b24gQXV0aG9yaXR5MAMCAQEagb5UaGlzIGNlcnRpZmljYXRlIHdhcyBpc3N1ZWQgYWNjb3JkaW5n IHRvIHRoZSBDbGFzcyAxIFZhbGlkYXRpb24gcmVxdWlyZW1lbnRzIG9mIHRoZSBTdGFydENvbSBD QSBwb2xpY3ksIHJlbGlhbmNlIG9ubHkgZm9yIHRoZSBpbnRlbmRlZCBwdXJwb3NlIGluIGNvbXBs aWFuY2Ugb2YgdGhlIHJlbHlpbmcgcGFydHkgb2JsaWdhdGlvbnMuMDYGA1UdHwQvMC0wK6ApoCeG JWh0dHA6Ly9jcmwuc3RhcnRzc2wuY29tL2NydHUxLWNybC5jcmwwgY4GCCsGAQUFBwEBBIGBMH8w OQYIKwYBBQUHMAGGLWh0dHA6Ly9vY3NwLnN0YXJ0c3NsLmNvbS9zdWIvY2xhc3MxL2NsaWVudC9j YTBCBggrBgEFBQcwAoY2aHR0cDovL2FpYS5zdGFydHNzbC5jb20vY2VydHMvc3ViLmNsYXNzMS5j bGllbnQuY2EuY3J0MCMGA1UdEgQcMBqGGGh0dHA6Ly93d3cuc3RhcnRzc2wuY29tLzANBgkqhkiG 9w0BAQsFAAOCAQEAeCvIkMPtBUZ98RJwd7yCLtlYuAt2RpzjFj/dBRVy62ergLvQCsVQo11FT+pw BLDqKUzLu+vb1XnHQb4NCjtouWkw03Uy1+IPXdNtIODi1ltTYspwJF/KCqiS6med6rxyuMz+Clj0 t20qg1lQqLEzHyPh+rZIPuht4EtBx6B0yymYSE98+j0GQH3qHzO3nejTnQHI9CdpTzgx888+2Pce MDMGCXYnaK81A1WJDSJIpvGpO4SvRetDWnQOcPwYqxQE0pc0cldIdbZeqDYrBGkHKrRr8ulKAkw4 c2ie6UFWpXw1yfwOOz9ITY/wl/z5pGNcEB7BCc9qW4eZarXj/3ztKzCCBjQwggQcoAMCAQICAR4w DQYJKoZIhvcNAQEFBQAwfTELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0YXJ0Q29tIEx0ZC4xKzAp BgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcxKTAnBgNVBAMTIFN0YXJ0 Q29tIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MB4XDTA3MTAyNDIxMDE1NVoXDTE3MTAyNDIxMDE1 NVowgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQKEw1TdGFydENvbSBMdGQuMSswKQYDVQQLEyJTZWN1 cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWduaW5nMTgwNgYDVQQDEy9TdGFydENvbSBDbGFzcyAx IFByaW1hcnkgSW50ZXJtZWRpYXRlIENsaWVudCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC AQoCggEBAMcJg8zOLdgasSmkLhOrlr6KMoOMpohBllVHrdRvEg/q6r8jR+EK75xCGhR8ToREoqe7 zM9/UnC6TS2y9UKTpT1v7RSMzR0t6ndl0TWBuUr/UXBhPk+Kmy7bI4yW4urC+y7P3/1/X7U8ocb8 VpH/Clt+4iq7nirMcNh6qJR+xjOhV+VHzQMALuGYn5KZmc1NbJQYclsGkDxDz2UbFqE2+6vIZoL+ jb9x4Pa5gNf1TwSDkOkikZB1xtB4ZqtXThaABSONdfmv/Z1pua3FYxnCFmdr/+N2JLKutIxMYqQO Jebr/f/h5t95m4JgrM3Y/w7YX9d7YAL9jvN4SydHsU6n65cCAwEAAaOCAa0wggGpMA8GA1UdEwEB /wQFMAMBAf8wDgYDVR0PAQH/BAQDAgEGMB0GA1UdDgQWBBRTcu2SnODaywFcfH6WNU7y1LhRgjAf BgNVHSMEGDAWgBROC+8apEBbpRdphzDKNGhD0EGu8jBmBggrBgEFBQcBAQRaMFgwJwYIKwYBBQUH MAGGG2h0dHA6Ly9vY3NwLnN0YXJ0c3NsLmNvbS9jYTAtBggrBgEFBQcwAoYhaHR0cDovL3d3dy5z dGFydHNzbC5jb20vc2ZzY2EuY3J0MFsGA1UdHwRUMFIwJ6AloCOGIWh0dHA6Ly93d3cuc3RhcnRz c2wuY29tL3Nmc2NhLmNybDAnoCWgI4YhaHR0cDovL2NybC5zdGFydHNzbC5jb20vc2ZzY2EuY3Js MIGABgNVHSAEeTB3MHUGCysGAQQBgbU3AQIBMGYwLgYIKwYBBQUHAgEWImh0dHA6Ly93d3cuc3Rh cnRzc2wuY29tL3BvbGljeS5wZGYwNAYIKwYBBQUHAgEWKGh0dHA6Ly93d3cuc3RhcnRzc2wuY29t L2ludGVybWVkaWF0ZS5wZGYwDQYJKoZIhvcNAQEFBQADggIBAAqDCH14qywGXLhjjF6uHLkjd02h cdh9hrw+VUsv+q1eeQWB21jWj3kJ96AUlPCoEGZ/ynJNScWy6QMVQjbbMXltUfO4n4bGGdKo3awP Wp61tjAFgraLJgDk+DsSvUD6EowjMTNx25GQgyYJ5RPIzKKR9tQW8gGK+2+RHxkUCTbYFnL6kl8C h507rUdPPipJ9CgJFws3kDS3gOS5WFMxcjO5DwKfKSETEPrHh7p5shuuNktvsv6hxHTLhiMKX893 gxdT3XLS9OKmCv87vkINQcNEcIIoFWbP9HORz9v3vQwR4e3ksLc2JZOAFK+ssS5XMEoznzpihEP0 PLc4dCBYjbvSD7kxgDwZ+Aj8Q9PkbvE9sIPP7ON0fz095HdThKjiVJe6vofq+n6b1NBc8XdrQvBm unwxD5nvtTW4vtN6VY7mUCmxsCieuoBJ9OlqmsVWQvifIYf40dJPZkk9YgGTzWLpXDSfLSplbY2L L9C9U0ptvjcDjefLTvqSFc7tw1sEhF0n/qpA2r0GpvkLRDmcSwVyPvmjFBGqUp/pNy8ZuPGQmHwF i2/14+xeSUDG2bwnsYJQG2EdJCB6luQ57GEnTA/yKZSTKI8dDQa8Sd3zfXb19mOgSF0bBdXbuKhE puP9wirslFe6fQ1t5j5R0xi72MZ8ikMu1RQZKCyDbMwazlHiMYIDnzCCA5sCAQEwgZQwgYwxCzAJ BgNVBAYTAklMMRYwFAYDVQQKEw1TdGFydENvbSBMdGQuMSswKQYDVQQLEyJTZWN1cmUgRGlnaXRh bCBDZXJ0aWZpY2F0ZSBTaWduaW5nMTgwNgYDVQQDEy9TdGFydENvbSBDbGFzcyAxIFByaW1hcnkg SW50ZXJtZWRpYXRlIENsaWVudCBDQQIDDl3GMA0GCWCGSAFlAwQCAwUAoIIB2zAYBgkqhkiG9w0B CQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0xNTEwMjQwMzU2MTJaME8GCSqGSIb3DQEJ BDFCBEDsygQwb00HbYPbkRbEIndOPIrcTi/FMBzsl4gx2+cJRR3eBHqn39nvVfYjEiq7iHTs9Ac4 skkd128esQuvpbq+MIGlBgkrBgEEAYI3EAQxgZcwgZQwgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQK Ew1TdGFydENvbSBMdGQuMSswKQYDVQQLEyJTZWN1cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWdu aW5nMTgwNgYDVQQDEy9TdGFydENvbSBDbGFzcyAxIFByaW1hcnkgSW50ZXJtZWRpYXRlIENsaWVu dCBDQQIDDl3GMIGnBgsqhkiG9w0BCRACCzGBl6CBlDCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoT DVN0YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25p bmcxODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50 IENBAgMOXcYwDQYJKoZIhvcNAQEBBQAEggEAAEa0shDvMdTyTdc0U63OF6fZJXTUr43nJGeA0IIZ fSqDVpN4+rXzcXwFMXVYIP7GaehJqbRgbw+J85kbGsbZUwpR8NVlYrnAHI4pWpRtbcC2JQJMsz7w H0BVpVDzE1duWR+7keaK7CYrvsuQQiajcQ6azT3cjmM4ObIPzdDR5a/FPNNyaA4P5iBK/7OM/hzt nX8T9iIkKca1HhyNC+hNkjDgKAK8Qx/Lko3zhd0gM5nI3gKyJDcbZ4L7a7Jf4VsXsbhtjm7LGDPt h1uUWMgOpYD506CphpFHL2U+1TPuAWB2zDs78ZEF9DypLW/xCCpsTetHUmncqbSH7Hl/VuzyWAAA AAAAAA== --=-7JJGn9BKVa4rccJ2V/l5--