Return-Path: From: Lukasz Rymanowski To: linux-bluetooth@vger.kernel.org Cc: Lukasz Rymanowski Subject: [PATCH 1/3] shared/crypto: Add support for AES-CMAC-128 Date: Wed, 14 May 2014 11:04:24 +0200 Message-Id: <1400058266-31790-1-git-send-email-lukasz.rymanowski@tieto.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: This patch extends bt_crypto with AF_ALG socket for cmac(aes) hash. Socket is created on bt_crybto initialization. --- src/shared/crypto.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/src/shared/crypto.c b/src/shared/crypto.c index cc7536a..f0b2979 100644 --- a/src/shared/crypto.c +++ b/src/shared/crypto.c @@ -70,6 +70,7 @@ struct bt_crypto { int ref_count; int ecb_aes; int urandom; + int cmac_aes; }; static int urandom_setup(void) @@ -105,6 +106,28 @@ static int ecb_aes_setup(void) return fd; } +static int cmac_aes_setup(void) +{ + struct sockaddr_alg salg; + int fd; + + fd = socket(PF_ALG, SOCK_SEQPACKET | SOCK_CLOEXEC, 0); + if (fd < 0) + return -1; + + memset(&salg, 0, sizeof(salg)); + salg.salg_family = AF_ALG; + strcpy((char *) salg.salg_type, "hash"); + strcpy((char *) salg.salg_name, "cmac(aes)"); + + if (bind(fd, (struct sockaddr *) &salg, sizeof(salg)) < 0) { + close(fd); + return -1; + } + + return fd; +} + struct bt_crypto *bt_crypto_new(void) { struct bt_crypto *crypto; @@ -126,6 +149,14 @@ struct bt_crypto *bt_crypto_new(void) return NULL; } + crypto->cmac_aes = cmac_aes_setup(); + if (crypto->cmac_aes < 0) { + close(crypto->urandom); + close(crypto->ecb_aes); + free(crypto); + return NULL; + } + return bt_crypto_ref(crypto); } @@ -149,6 +180,7 @@ void bt_crypto_unref(struct bt_crypto *crypto) close(crypto->urandom); close(crypto->ecb_aes); + close(crypto->cmac_aes); free(crypto); } -- 1.8.4