diff options
| -rw-r--r-- | crypto/Makefile.objs | 1 | ||||
| -rw-r--r-- | crypto/tlscredsx509.c | 263 | ||||
| -rw-r--r-- | include/crypto/tlscredsx509.h | 112 | ||||
| -rw-r--r-- | qemu-options.hx | 27 | ||||
| -rw-r--r-- | trace-events | 3 |
5 files changed, 406 insertions, 0 deletions
diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs index 283a68b..8f16b31 100644 --- a/crypto/Makefile.objs +++ b/crypto/Makefile.objs @@ -5,6 +5,7 @@ crypto-obj-y += desrfb.o crypto-obj-y += cipher.o crypto-obj-y += tlscreds.o crypto-obj-y += tlscredsanon.o +crypto-obj-y += tlscredsx509.o # Let the userspace emulators avoid linking gnutls/etc crypto-aes-obj-y = aes.o diff --git a/crypto/tlscredsx509.c b/crypto/tlscredsx509.c new file mode 100644 index 0000000..6cc7b53 --- /dev/null +++ b/crypto/tlscredsx509.c @@ -0,0 +1,263 @@ +/* + * QEMU crypto TLS x509 credential support + * + * Copyright (c) 2015 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#include "crypto/tlscredsx509.h" +#include "crypto/tlscredspriv.h" +#include "qom/object_interfaces.h" +#include "trace.h" + + +#ifdef CONFIG_GNUTLS + + +static int +qcrypto_tls_creds_x509_load(QCryptoTLSCredsX509 *creds, + Error **errp) +{ + char *cacert = NULL, *cacrl = NULL, *cert = NULL, + *key = NULL, *dhparams = NULL; + int ret; + int rv = -1; + + trace_qcrypto_tls_creds_x509_load(creds, + creds->parent_obj.dir ? creds->parent_obj.dir : "<nodir>"); + + if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { + if (qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_X509_CA_CERT, + true, &cacert, errp) < 0 || + qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_X509_CA_CRL, + false, &cacrl, errp) < 0 || + qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_X509_SERVER_CERT, + true, &cert, errp) < 0 || + qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_X509_SERVER_KEY, + true, &key, errp) < 0 || + qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_DH_PARAMS, + false, &dhparams, errp) < 0) { + goto cleanup; + } + } else { + if (qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_X509_CA_CERT, + true, &cacert, errp) < 0 || + qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_X509_CLIENT_CERT, + false, &cert, errp) < 0 || + qcrypto_tls_creds_get_path(&creds->parent_obj, + QCRYPTO_TLS_CREDS_X509_CLIENT_KEY, + false, &key, errp) < 0) { + goto cleanup; + } + } + + ret = gnutls_certificate_allocate_credentials(&creds->data); + if (ret < 0) { + error_setg(errp, "Cannot allocate credentials: '%s'", + gnutls_strerror(ret)); + goto cleanup; + } + + ret = gnutls_certificate_set_x509_trust_file(creds->data, + cacert, + GNUTLS_X509_FMT_PEM); + if (ret < 0) { + error_setg(errp, "Cannot load CA certificate '%s': %s", + cacert, gnutls_strerror(ret)); + goto cleanup; + } + + if (cert != NULL && key != NULL) { + ret = gnutls_certificate_set_x509_key_file(creds->data, + cert, key, + GNUTLS_X509_FMT_PEM); + if (ret < 0) { + error_setg(errp, "Cannot load certificate '%s' & key '%s': %s", + cert, key, gnutls_strerror(ret)); + goto cleanup; + } + } + + if (cacrl != NULL) { + ret = gnutls_certificate_set_x509_crl_file(creds->data, + cacrl, + GNUTLS_X509_FMT_PEM); + if (ret < 0) { + error_setg(errp, "Cannot load CRL '%s': %s", + cacrl, gnutls_strerror(ret)); + goto cleanup; + } + } + + if (creds->parent_obj.endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER) { + if (qcrypto_tls_creds_get_dh_params_file(&creds->parent_obj, dhparams, + &creds->parent_obj.dh_params, + errp) < 0) { + goto cleanup; + } + gnutls_certificate_set_dh_params(creds->data, + creds->parent_obj.dh_params); + } + + rv = 0; + cleanup: + g_free(cacert); + g_free(cacrl); + g_free(cert); + g_free(key); + g_free(dhparams); + return rv; +} + + +static void +qcrypto_tls_creds_x509_unload(QCryptoTLSCredsX509 *creds) +{ + if (creds->data) { + gnutls_certificate_free_credentials(creds->data); + creds->data = NULL; + } +} + + +#else /* ! CONFIG_GNUTLS */ + + +static void +qcrypto_tls_creds_x509_load(QCryptoTLSCredsX509 *creds G_GNUC_UNUSED, + Error **errp) +{ + error_setg(errp, "TLS credentials support requires GNUTLS"); +} + + +static void +qcrypto_tls_creds_x509_unload(QCryptoTLSCredsX509 *creds G_GNUC_UNUSED) +{ + /* nada */ +} + + +#endif /* ! CONFIG_GNUTLS */ + + +static void +qcrypto_tls_creds_x509_prop_set_loaded(Object *obj, + bool value, + Error **errp) +{ + QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); + + if (value) { + qcrypto_tls_creds_x509_load(creds, errp); + } else { + qcrypto_tls_creds_x509_unload(creds); + } +} + + +#ifdef CONFIG_GNUTLS + + +static bool +qcrypto_tls_creds_x509_prop_get_loaded(Object *obj, + Error **errp G_GNUC_UNUSED) +{ + QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); + + return creds->data != NULL; +} + + +#else /* ! CONFIG_GNUTLS */ + + +static bool +qcrypto_tls_creds_x509_prop_get_loaded(Object *obj G_GNUC_UNUSED, + Error **errp G_GNUC_UNUSED) +{ + return false; +} + + +#endif /* ! CONFIG_GNUTLS */ + + +static void +qcrypto_tls_creds_x509_complete(UserCreatable *uc, Error **errp) +{ + object_property_set_bool(OBJECT(uc), true, "loaded", errp); +} + + +static void +qcrypto_tls_creds_x509_init(Object *obj) +{ + object_property_add_bool(obj, "loaded", + qcrypto_tls_creds_x509_prop_get_loaded, + qcrypto_tls_creds_x509_prop_set_loaded, + NULL); +} + + +static void +qcrypto_tls_creds_x509_finalize(Object *obj) +{ + QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj); + + qcrypto_tls_creds_x509_unload(creds); +} + + +static void +qcrypto_tls_creds_x509_class_init(ObjectClass *oc, void *data) +{ + UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); + + ucc->complete = qcrypto_tls_creds_x509_complete; +} + + +static const TypeInfo qcrypto_tls_creds_x509_info = { + .parent = TYPE_QCRYPTO_TLS_CREDS, + .name = TYPE_QCRYPTO_TLS_CREDS_X509, + .instance_size = sizeof(QCryptoTLSCredsX509), + .instance_init = qcrypto_tls_creds_x509_init, + .instance_finalize = qcrypto_tls_creds_x509_finalize, + .class_size = sizeof(QCryptoTLSCredsX509Class), + .class_init = qcrypto_tls_creds_x509_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_USER_CREATABLE }, + { } + } +}; + + +static void +qcrypto_tls_creds_x509_register_types(void) +{ + type_register_static(&qcrypto_tls_creds_x509_info); +} + + +type_init(qcrypto_tls_creds_x509_register_types); diff --git a/include/crypto/tlscredsx509.h b/include/crypto/tlscredsx509.h new file mode 100644 index 0000000..abdb128 --- /dev/null +++ b/include/crypto/tlscredsx509.h @@ -0,0 +1,112 @@ +/* + * QEMU crypto TLS x509 credential support + * + * Copyright (c) 2015 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#ifndef QCRYPTO_TLSCRED_X509_H__ +#define QCRYPTO_TLSCRED_X509_H__ + +#include "crypto/tlscreds.h" + +#define TYPE_QCRYPTO_TLS_CREDS_X509 "tls-creds-x509" +#define QCRYPTO_TLS_CREDS_X509(obj) \ + OBJECT_CHECK(QCryptoTLSCredsX509, (obj), TYPE_QCRYPTO_TLS_CREDS_X509) + +typedef struct QCryptoTLSCredsX509 QCryptoTLSCredsX509; +typedef struct QCryptoTLSCredsX509Class QCryptoTLSCredsX509Class; + +#define QCRYPTO_TLS_CREDS_X509_CA_CERT "ca-cert.pem" +#define QCRYPTO_TLS_CREDS_X509_CA_CRL "ca-crl.pem" +#define QCRYPTO_TLS_CREDS_X509_SERVER_KEY "server-key.pem" +#define QCRYPTO_TLS_CREDS_X509_SERVER_CERT "server-cert.pem" +#define QCRYPTO_TLS_CREDS_X509_CLIENT_KEY "client-key.pem" +#define QCRYPTO_TLS_CREDS_X509_CLIENT_CERT "client-cert.pem" + + +/** + * QCryptoTLSCredsX509: + * + * The QCryptoTLSCredsX509 object provides a representation + * of x509 credentials used to perform a TLS handshake. + * + * This is a user creatable object, which can be instantiated + * via object_new_propv(): + * + * <example> + * <title>Creating x509 TLS credential objects in code</title> + * <programlisting> + * Object *obj; + * Error *err = NULL; + * obj = object_new_propv(TYPE_QCRYPTO_TLS_CREDS_X509, + * "tlscreds0", + * &err, + * "endpoint", "server", + * "dir", "/path/x509/cert/dir", + * "verify-peer", "yes", + * NULL); + * </programlisting> + * </example> + * + * Or via QMP: + * + * <example> + * <title>Creating x509 TLS credential objects via QMP</title> + * <programlisting> + * { + * "execute": "object-add", "arguments": { + * "id": "tlscreds0", + * "qom-type": "tls-creds-x509", + * "props": { + * "endpoint": "server", + * "dir": "/path/to/x509/cert/dir", + * "verify-peer": false + * } + * } + * } + * </programlisting> + * </example> + * + * + * Or via the CLI: + * + * <example> + * <title>Creating x509 TLS credential objects via CLI</title> + * <programlisting> + * qemu-system-x86_64 -object tls-creds-x509,id=tlscreds0,\ + * endpoint=server,verify-peer=off,\ + * dir=/path/to/x509/certdir/ + * </programlisting> + * </example> + * + */ + +struct QCryptoTLSCredsX509 { + QCryptoTLSCreds parent_obj; +#ifdef CONFIG_GNUTLS + gnutls_certificate_credentials_t data; +#endif +}; + + +struct QCryptoTLSCredsX509Class { + QCryptoTLSCredsClass parent_class; +}; + + +#endif /* QCRYPTO_TLSCRED_X509_H__ */ + diff --git a/qemu-options.hx b/qemu-options.hx index 625f306..3f2e25b 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3591,6 +3591,33 @@ expensive operation that consumes random pool entropy, so it is recommended that a persistent set of parameters be generated upfront and saved. +@item -object tls-creds-x509,id=@var{id},endpoint=@var{endpoint},dir=@var{/path/to/cred/dir},verify-peer=@var{on|off} + +Creates a TLS anonymous credentials object, which can be used to provide +TLS support on network backends. The @option{id} parameter is a unique +ID which network backends will use to access the credentials. The +@option{endpoint} is either @option{server} or @option{client} depending +on whether the QEMU network backend that uses the credentials will be +acting as a client or as a server. If @option{verify-peer} is enabled +(the default) then once the handshake is completed, the peer credentials +will be verified. With x509 certificates, this implies that the clients +must be provided with valid client certificates too. + +The @var{dir} parameter tells QEMU where to find the credential +files. For server endpoints, this directory may contain a file +@var{dh-params.pem} providing diffie-hellman parameters to use +for the TLS server. If the file is missing, QEMU will generate +a set of DH parameters at startup. This is a computationally +expensive operation that consumes random pool entropy, so it is +recommended that a persistent set of parameters be generated +upfront and saved. + +For x509 certificate credentials the directory will contain further files +providing the x509 certificates. The certificates must be stored +in PEM format, in filenames @var{ca-cert.pem}, @var{ca-crl.pem} (optional), +@var{server-cert.pem} (only servers), @var{server-key.pem} (only servers), +@var{client-cert.pem} (only clients), and @var{client-key.pem} (only clients). + @end table ETEXI diff --git a/trace-events b/trace-events index 459397b..b1de160 100644 --- a/trace-events +++ b/trace-events @@ -1673,3 +1673,6 @@ qcrypto_tls_creds_get_path(void *creds, const char *filename, const char *path) # crypto/tlscredsanon.c qcrypto_tls_creds_anon_load(void *creds, const char *dir) "TLS creds anon load creds=%p dir=%s" + +# crypto/tlscredsx509.c +qcrypto_tls_creds_x509_load(void *creds, const char *dir) "TLS creds x509 load creds=%p dir=%s" |