From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933592AbbLQXxV (ORCPT ); Thu, 17 Dec 2015 18:53:21 -0500 Received: from mail.eperm.de ([89.247.134.16]:40546 "EHLO mail.eperm.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754722AbbLQXwI (ORCPT ); Thu, 17 Dec 2015 18:52:08 -0500 From: Stephan Mueller To: herbert@gondor.apana.org.au Cc: tadeusz.struk@intel.com, marcel@holtmann.org, dwmw2@infradead.org, linux-api@vger.kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/4] crypto: AF_ALG -- add setpubkey setsockopt call Date: Fri, 18 Dec 2015 00:50:40 +0100 Message-ID: <2319743.4dGlRbI5FA@myon.chronox.de> User-Agent: KMail/4.14.10 (Linux/4.2.6-301.fc23.x86_64; KDE/4.14.14; x86_64; ; ) In-Reply-To: <2602093.Yrp6nKrmX6@myon.chronox.de> References: <2602093.Yrp6nKrmX6@myon.chronox.de> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For supporting asymmetric ciphers, user space must be able to set the public key. The patch adds a new setsockopt call for setting the public key. Signed-off-by: Stephan Mueller --- crypto/af_alg.c | 18 +++++++++++++----- include/crypto/if_alg.h | 1 + 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/crypto/af_alg.c b/crypto/af_alg.c index a8e7aa3..767a134 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -173,13 +173,17 @@ static int alg_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) } static int alg_setkey(struct sock *sk, char __user *ukey, - unsigned int keylen) + unsigned int keylen, + int (*setkey)(void *private, const u8 *key, + unsigned int keylen)) { struct alg_sock *ask = alg_sk(sk); - const struct af_alg_type *type = ask->type; u8 *key; int err; + if (!setkey) + return -ENOPROTOOPT; + key = sock_kmalloc(sk, keylen, GFP_KERNEL); if (!key) return -ENOMEM; @@ -188,7 +192,7 @@ static int alg_setkey(struct sock *sk, char __user *ukey, if (copy_from_user(key, ukey, keylen)) goto out; - err = type->setkey(ask->private, key, keylen); + err = setkey(ask->private, key, keylen); out: sock_kzfree_s(sk, key, keylen); @@ -214,10 +218,14 @@ static int alg_setsockopt(struct socket *sock, int level, int optname, case ALG_SET_KEY: if (sock->state == SS_CONNECTED) goto unlock; - if (!type->setkey) + + err = alg_setkey(sk, optval, optlen, type->setkey); + break; + case ALG_SET_PUBKEY: + if (sock->state == SS_CONNECTED) goto unlock; - err = alg_setkey(sk, optval, optlen); + err = alg_setkey(sk, optval, optlen, type->setpubkey); break; case ALG_SET_AEAD_AUTHSIZE: if (sock->state == SS_CONNECTED) diff --git a/include/crypto/if_alg.h b/include/crypto/if_alg.h index 018afb2..ca4dc72 100644 --- a/include/crypto/if_alg.h +++ b/include/crypto/if_alg.h @@ -49,6 +49,7 @@ struct af_alg_type { void *(*bind)(const char *name, u32 type, u32 mask); void (*release)(void *private); int (*setkey)(void *private, const u8 *key, unsigned int keylen); + int (*setpubkey)(void *private, const u8 *key, unsigned int keylen); int (*accept)(void *private, struct sock *sk); int (*setauthsize)(void *private, unsigned int authsize); -- 2.5.0