diff options
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/Makefile.objs | 1 | ||||
| -rw-r--r-- | crypto/tls-cipher-suites.c | 126 | ||||
| -rw-r--r-- | crypto/trace-events | 5 |
3 files changed, 132 insertions, 0 deletions
diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs index 707c02ad37..f1965b1a68 100644 --- a/crypto/Makefile.objs +++ b/crypto/Makefile.objs @@ -13,6 +13,7 @@ crypto-obj-y += cipher.o crypto-obj-$(CONFIG_AF_ALG) += afalg.o crypto-obj-$(CONFIG_AF_ALG) += cipher-afalg.o crypto-obj-$(CONFIG_AF_ALG) += hash-afalg.o +crypto-obj-$(CONFIG_GNUTLS) += tls-cipher-suites.o crypto-obj-y += tlscreds.o crypto-obj-y += tlscredsanon.o crypto-obj-y += tlscredspsk.o diff --git a/crypto/tls-cipher-suites.c b/crypto/tls-cipher-suites.c new file mode 100644 index 0000000000..0d305b684b --- /dev/null +++ b/crypto/tls-cipher-suites.c @@ -0,0 +1,126 @@ +/* + * QEMU TLS Cipher Suites + * + * Copyright (c) 2018-2020 Red Hat, Inc. + * + * Author: Philippe Mathieu-Daudé <philmd@redhat.com> + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qom/object_interfaces.h" +#include "crypto/tlscreds.h" +#include "crypto/tls-cipher-suites.h" +#include "hw/nvram/fw_cfg.h" +#include "trace.h" + +/* + * IANA registered TLS ciphers: + * https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4 + */ +typedef struct { + uint8_t data[2]; +} QEMU_PACKED IANA_TLS_CIPHER; + +GByteArray *qcrypto_tls_cipher_suites_get_data(QCryptoTLSCipherSuites *obj, + Error **errp) +{ + QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(obj); + gnutls_priority_t pcache; + GByteArray *byte_array; + const char *err; + size_t i; + int ret; + + trace_qcrypto_tls_cipher_suite_priority(creds->priority); + ret = gnutls_priority_init(&pcache, creds->priority, &err); + if (ret < 0) { + error_setg(errp, "Syntax error using priority '%s': %s", + creds->priority, gnutls_strerror(ret)); + return NULL; + } + + byte_array = g_byte_array_new(); + + for (i = 0;; i++) { + int ret; + unsigned idx; + const char *name; + IANA_TLS_CIPHER cipher; + gnutls_protocol_t protocol; + const char *version; + + ret = gnutls_priority_get_cipher_suite_index(pcache, i, &idx); + if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) { + break; + } + if (ret == GNUTLS_E_UNKNOWN_CIPHER_SUITE) { + continue; + } + + name = gnutls_cipher_suite_info(idx, (unsigned char *)&cipher, + NULL, NULL, NULL, &protocol); + if (name == NULL) { + continue; + } + + version = gnutls_protocol_get_name(protocol); + g_byte_array_append(byte_array, cipher.data, 2); + trace_qcrypto_tls_cipher_suite_info(cipher.data[0], + cipher.data[1], + version, name); + } + trace_qcrypto_tls_cipher_suite_count(byte_array->len); + gnutls_priority_deinit(pcache); + + return byte_array; +} + +static void qcrypto_tls_cipher_suites_complete(UserCreatable *uc, + Error **errp) +{ + QCryptoTLSCreds *creds = QCRYPTO_TLS_CREDS(uc); + + if (!creds->priority) { + error_setg(errp, "'priority' property is not set"); + return; + } +} + +static GByteArray *qcrypto_tls_cipher_suites_fw_cfg_gen_data(Object *obj, + Error **errp) +{ + return qcrypto_tls_cipher_suites_get_data(QCRYPTO_TLS_CIPHER_SUITES(obj), + errp); +} + +static void qcrypto_tls_cipher_suites_class_init(ObjectClass *oc, void *data) +{ + UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); + FWCfgDataGeneratorClass *fwgc = FW_CFG_DATA_GENERATOR_CLASS(oc); + + ucc->complete = qcrypto_tls_cipher_suites_complete; + fwgc->get_data = qcrypto_tls_cipher_suites_fw_cfg_gen_data; +} + +static const TypeInfo qcrypto_tls_cipher_suites_info = { + .parent = TYPE_QCRYPTO_TLS_CREDS, + .name = TYPE_QCRYPTO_TLS_CIPHER_SUITES, + .instance_size = sizeof(QCryptoTLSCreds), + .class_size = sizeof(QCryptoTLSCredsClass), + .class_init = qcrypto_tls_cipher_suites_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_USER_CREATABLE }, + { TYPE_FW_CFG_DATA_GENERATOR_INTERFACE }, + { } + } +}; + +static void qcrypto_tls_cipher_suites_register_types(void) +{ + type_register_static(&qcrypto_tls_cipher_suites_info); +} + +type_init(qcrypto_tls_cipher_suites_register_types); diff --git a/crypto/trace-events b/crypto/trace-events index 9e594d30e8..798b6067ab 100644 --- a/crypto/trace-events +++ b/crypto/trace-events @@ -21,3 +21,8 @@ qcrypto_tls_creds_x509_load_cert_list(void *creds, const char *file) "TLS creds # tlssession.c qcrypto_tls_session_new(void *session, void *creds, const char *hostname, const char *authzid, int endpoint) "TLS session new session=%p creds=%p hostname=%s authzid=%s endpoint=%d" qcrypto_tls_session_check_creds(void *session, const char *status) "TLS session check creds session=%p status=%s" + +# tls-cipher-suites.c +qcrypto_tls_cipher_suite_priority(const char *name) "priority: %s" +qcrypto_tls_cipher_suite_info(uint8_t data0, uint8_t data1, const char *version, const char *name) "data=[0x%02x,0x%02x] version=%s name=%s" +qcrypto_tls_cipher_suite_count(unsigned count) "count: %u" |