1 /* 2 * QEMU Crypto af_alg support 3 * 4 * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD. 5 * 6 * Authors: 7 * Longpeng(Mike) <longpeng2@huawei.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or 10 * (at your option) any later version. See the COPYING file in the 11 * top-level directory. 12 */ 13 #include "qemu/osdep.h" 14 #include "qemu/cutils.h" 15 #include "qemu/sockets.h" 16 #include "qapi/error.h" 17 #include "afalgpriv.h" 18 19 static bool 20 qcrypto_afalg_build_saddr(const char *type, const char *name, 21 struct sockaddr_alg *salg, Error **errp) 22 { 23 salg->salg_family = AF_ALG; 24 25 if (strnlen(type, SALG_TYPE_LEN_MAX) >= SALG_TYPE_LEN_MAX) { 26 error_setg(errp, "Afalg type(%s) is larger than %d bytes", 27 type, SALG_TYPE_LEN_MAX); 28 return false; 29 } 30 31 if (strnlen(name, SALG_NAME_LEN_MAX) >= SALG_NAME_LEN_MAX) { 32 error_setg(errp, "Afalg name(%s) is larger than %d bytes", 33 name, SALG_NAME_LEN_MAX); 34 return false; 35 } 36 37 pstrcpy((char *)salg->salg_type, SALG_TYPE_LEN_MAX, type); 38 pstrcpy((char *)salg->salg_name, SALG_NAME_LEN_MAX, name); 39 40 return true; 41 } 42 43 static int 44 qcrypto_afalg_socket_bind(const char *type, const char *name, 45 Error **errp) 46 { 47 int sbind; 48 struct sockaddr_alg salg = {0}; 49 50 if (!qcrypto_afalg_build_saddr(type, name, &salg, errp)) { 51 return -1; 52 } 53 54 sbind = qemu_socket(AF_ALG, SOCK_SEQPACKET, 0); 55 if (sbind < 0) { 56 error_setg_errno(errp, errno, "Failed to create socket"); 57 return -1; 58 } 59 60 if (bind(sbind, (const struct sockaddr *)&salg, sizeof(salg)) != 0) { 61 error_setg_errno(errp, errno, "Failed to bind socket"); 62 close(sbind); 63 return -1; 64 } 65 66 return sbind; 67 } 68 69 QCryptoAFAlg * 70 qcrypto_afalg_comm_alloc(const char *type, const char *name, 71 Error **errp) 72 { 73 QCryptoAFAlg *afalg; 74 75 afalg = g_new0(QCryptoAFAlg, 1); 76 /* initialize crypto API socket */ 77 afalg->opfd = -1; 78 afalg->tfmfd = qcrypto_afalg_socket_bind(type, name, errp); 79 if (afalg->tfmfd == -1) { 80 goto error; 81 } 82 83 afalg->opfd = qemu_accept(afalg->tfmfd, NULL, 0); 84 if (afalg->opfd == -1) { 85 error_setg_errno(errp, errno, "Failed to accept socket"); 86 goto error; 87 } 88 89 return afalg; 90 91 error: 92 qcrypto_afalg_comm_free(afalg); 93 return NULL; 94 } 95 96 void qcrypto_afalg_comm_free(QCryptoAFAlg *afalg) 97 { 98 if (!afalg) { 99 return; 100 } 101 102 if (afalg->msg) { 103 g_free(afalg->msg->msg_control); 104 g_free(afalg->msg); 105 } 106 107 if (afalg->tfmfd != -1) { 108 close(afalg->tfmfd); 109 } 110 111 if (afalg->opfd != -1) { 112 close(afalg->opfd); 113 } 114 115 g_free(afalg); 116 } 117