/* * QEMU Crypto af_alg support * * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD. * * Authors: * Longpeng(Mike) <longpeng2@huawei.com> * * This work is licensed under the terms of the GNU GPL, version 2 or * (at your option) any later version. See the COPYING file in the * top-level directory. */ #include "qemu/osdep.h" #include "qemu/cutils.h" #include "qemu/sockets.h" #include "qapi/error.h" #include "afalgpriv.h" static bool qcrypto_afalg_build_saddr(const char *type, const char *name, struct sockaddr_alg *salg, Error **errp) { salg->salg_family = AF_ALG; if (strnlen(type, SALG_TYPE_LEN_MAX) >= SALG_TYPE_LEN_MAX) { error_setg(errp, "Afalg type(%s) is larger than %d bytes", type, SALG_TYPE_LEN_MAX); return false; } if (strnlen(name, SALG_NAME_LEN_MAX) >= SALG_NAME_LEN_MAX) { error_setg(errp, "Afalg name(%s) is larger than %d bytes", name, SALG_NAME_LEN_MAX); return false; } pstrcpy((char *)salg->salg_type, SALG_TYPE_LEN_MAX, type); pstrcpy((char *)salg->salg_name, SALG_NAME_LEN_MAX, name); return true; } static int qcrypto_afalg_socket_bind(const char *type, const char *name, Error **errp) { int sbind; struct sockaddr_alg salg = {0}; if (!qcrypto_afalg_build_saddr(type, name, &salg, errp)) { return -1; } sbind = qemu_socket(AF_ALG, SOCK_SEQPACKET, 0); if (sbind < 0) { error_setg_errno(errp, errno, "Failed to create socket"); return -1; } if (bind(sbind, (const struct sockaddr *)&salg, sizeof(salg)) != 0) { error_setg_errno(errp, errno, "Failed to bind socket"); closesocket(sbind); return -1; } return sbind; } QCryptoAFAlg * qcrypto_afalg_comm_alloc(const char *type, const char *name, Error **errp) { QCryptoAFAlg *afalg; afalg = g_new0(QCryptoAFAlg, 1); /* initilize crypto API socket */ afalg->opfd = -1; afalg->tfmfd = qcrypto_afalg_socket_bind(type, name, errp); if (afalg->tfmfd == -1) { goto error; } afalg->opfd = qemu_accept(afalg->tfmfd, NULL, 0); if (afalg->opfd == -1) { error_setg_errno(errp, errno, "Failed to accept socket"); goto error; } return afalg; error: qcrypto_afalg_comm_free(afalg); return NULL; } void qcrypto_afalg_comm_free(QCryptoAFAlg *afalg) { if (!afalg) { return; } if (afalg->msg) { g_free(afalg->msg->msg_control); g_free(afalg->msg); } if (afalg->tfmfd != -1) { closesocket(afalg->tfmfd); } if (afalg->opfd != -1) { closesocket(afalg->opfd); } g_free(afalg); }