From: David Woodhouse Subject: Re: [PATCH v2] crypto: AF_ALG - add support for keys/asymmetric-type Date: Wed, 13 Jan 2016 15:06:33 +0000 Message-ID: <1452697593.88154.49.camel@infradead.org> References: <20151226155014.27615.14985.stgit@desktop.home> <10464.1452691882@warthog.procyon.org.uk> <569659AC.9070506@intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="sha-1"; protocol="application/x-pkcs7-signature"; boundary="=-0tCAcBtt+Ath+7A0NAWW" Cc: herbert-lOAM2aK0SrRLBo1qDEOMRrpzq4S04n8Q@public.gmane.org, smueller-T9tCv8IpfcWELgA04lAiVw@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, marcel-kz+m5ild9QBg9hUCZPvPmw@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, keyrings-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-crypto-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, zohar-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org To: Tadeusz Struk , David Howells , Tadeusz Struk Return-path: In-Reply-To: <569659AC.9070506-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-crypto.vger.kernel.org --=-0tCAcBtt+Ath+7A0NAWW Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2016-01-13 at 06:05 -0800, Tadeusz Struk wrote: >=20 > I agree, ideally keyctl should do the job for all the cases and > request_key() should just return a key data. No, you can NOT RELY ON HAVING THE KEY DATA. It might be in hardware. You might have something which will perform sign/verify/encrypt/decrypt operations *with* the key at your request, but which can never just *give* you the key. Any crypto API which relies on *having* the key is fundamentally wrong. --=20 dwmw2 --=-0tCAcBtt+Ath+7A0NAWW Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIISjjCCBicw ggUPoAMCAQICAw3vNzANBgkqhkiG9w0BAQUFADCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0 YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcx ODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50IENB MB4XDTE1MDUwNTA5NDM0MVoXDTE2MDUwNTA5NTMzNlowQjEcMBoGA1UEAwwTZHdtdzJAaW5mcmFk ZWFkLm9yZzEiMCAGCSqGSIb3DQEJARYTZHdtdzJAaW5mcmFkZWFkLm9yZzCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMkbm9kPbx1j/X4RVyf/pPKSYwelcco69TvnQQbKM8m8xkWjXJI1 jpJ1jMaGUZGFToINMSZi7lZawUozudWbXSKy1SikENSTJHffsdRAIlsp+hR8vWvjsKUry6sEdqPG doa5RY7+N4WRusWZDYW/RRWE6i9EL9qV86CVPYqw22UBOUw4/j/HVGCV6TSB8yE5iEwhk/hUuzRr 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