Example of use to dump:
$ qemu-system-x86_64 -S \
-object tls-cipher-suites,id=mysuite,priority=@SYSTEM,verbose=yes
Cipher suites for @SYSTEM:
- TLS_AES_256_GCM_SHA384 0x13, 0x02 TLS1.3
- TLS_CHACHA20_POLY1305_SHA256 0x13, 0x03 TLS1.3
- TLS_AES_128_GCM_SHA256 0x13, 0x01 TLS1.3
- TLS_AES_128_CCM_SHA256 0x13, 0x04 TLS1.3
- TLS_ECDHE_RSA_AES_256_GCM_SHA384 0xc0, 0x30 TLS1.2
- TLS_ECDHE_RSA_CHACHA20_POLY1305 0xcc, 0xa8 TLS1.2
- TLS_ECDHE_RSA_AES_256_CBC_SHA1 0xc0, 0x14 TLS1.0
- TLS_ECDHE_RSA_AES_128_GCM_SHA256 0xc0, 0x2f TLS1.2
- TLS_ECDHE_RSA_AES_128_CBC_SHA1 0xc0, 0x13 TLS1.0
- TLS_ECDHE_ECDSA_AES_256_GCM_SHA384 0xc0, 0x2c TLS1.2
- TLS_ECDHE_ECDSA_CHACHA20_POLY1305 0xcc, 0xa9 TLS1.2
- TLS_ECDHE_ECDSA_AES_256_CCM 0xc0, 0xad TLS1.2
- TLS_ECDHE_ECDSA_AES_256_CBC_SHA1 0xc0, 0x0a TLS1.0
- TLS_ECDHE_ECDSA_AES_128_GCM_SHA256 0xc0, 0x2b TLS1.2
- TLS_ECDHE_ECDSA_AES_128_CCM 0xc0, 0xac TLS1.2
- TLS_ECDHE_ECDSA_AES_128_CBC_SHA1 0xc0, 0x09 TLS1.0
- TLS_RSA_AES_256_GCM_SHA384 0x00, 0x9d TLS1.2
- TLS_RSA_AES_256_CCM 0xc0, 0x9d TLS1.2
- TLS_RSA_AES_256_CBC_SHA1 0x00, 0x35 TLS1.0
- TLS_RSA_AES_128_GCM_SHA256 0x00, 0x9c TLS1.2
- TLS_RSA_AES_128_CCM 0xc0, 0x9c TLS1.2
- TLS_RSA_AES_128_CBC_SHA1 0x00, 0x2f TLS1.0
- TLS_DHE_RSA_AES_256_GCM_SHA384 0x00, 0x9f TLS1.2
- TLS_DHE_RSA_CHACHA20_POLY1305 0xcc, 0xaa TLS1.2
- TLS_DHE_RSA_AES_256_CCM 0xc0, 0x9f TLS1.2
- TLS_DHE_RSA_AES_256_CBC_SHA1 0x00, 0x39 TLS1.0
- TLS_DHE_RSA_AES_128_GCM_SHA256 0x00, 0x9e TLS1.2
- TLS_DHE_RSA_AES_128_CCM 0xc0, 0x9e TLS1.2
- TLS_DHE_RSA_AES_128_CBC_SHA1 0x00, 0x33 TLS1.0
total: 29 ciphers
Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
include/crypto/tls-cipher-suites.h | 39 +++++++++
crypto/tls-cipher-suites.c | 133 +++++++++++++++++++++++++++++
crypto/Makefile.objs | 1 +
3 files changed, 173 insertions(+)
create mode 100644 include/crypto/tls-cipher-suites.h
create mode 100644 crypto/tls-cipher-suites.c
diff --git a/include/crypto/tls-cipher-suites.h
b/include/crypto/tls-cipher-suites.h
new file mode 100644
index 0000000000..31e92916e1
--- /dev/null
+++ b/include/crypto/tls-cipher-suites.h
@@ -0,0 +1,39 @@
+/*
+ * QEMU TLS Cipher Suites
+ *
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * Author: Philippe Mathieu-Daudé <phi...@redhat.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef QCRYPTO_TLSCIPHERSUITES_H
+#define QCRYPTO_TLSCIPHERSUITES_H
+
+#include "qom/object.h"
+#include "crypto/tlscreds.h"
+
+#define TYPE_QCRYPTO_TLS_CIPHER_SUITES "tls-cipher-suites"
+#define QCRYPTO_TLS_CIPHER_SUITES(obj) \
+ OBJECT_CHECK(QCryptoTLSCipherSuites, (obj), TYPE_QCRYPTO_TLS_CIPHER_SUITES)
+
+/*
+ * IANA registered TLS ciphers:
+ *
https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-parameters-4
+ */
+typedef struct {
+ uint8_t data[2];
+} IANA_TLS_CIPHER;
+
+typedef struct QCryptoTLSCipherSuites {
+ /* <private> */
+ QCryptoTLSCreds parent_obj;
+
+ /* <public> */
+ bool verbose;
+ IANA_TLS_CIPHER *cipher_list;
+ unsigned cipher_count;
+} QCryptoTLSCipherSuites;
+
+#endif /* QCRYPTO_TLSCIPHERSUITES_H */
diff --git a/crypto/tls-cipher-suites.c b/crypto/tls-cipher-suites.c
new file mode 100644
index 0000000000..c6c51359bd
--- /dev/null
+++ b/crypto/tls-cipher-suites.c
@@ -0,0 +1,133 @@
+/*
+ * QEMU TLS Cipher Suites
+ *
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * Author: Philippe Mathieu-Daudé <phi...@redhat.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qom/object_interfaces.h"
+#include "qemu/error-report.h"
+#include "crypto/tlscreds.h"
+#include "crypto/tls-cipher-suites.h"
+
+static void parse_cipher_suites(QCryptoTLSCipherSuites *s,
+ const char *priority_name, Error **errp)
+{
+#ifdef CONFIG_GNUTLS
+ int ret;
+ unsigned int idx;
+ const char *name;
+ const char *err;
+ gnutls_protocol_t version;
+ gnutls_priority_t pcache;
+
+ assert(priority_name);
+ ret = gnutls_priority_init(&pcache, priority_name, &err);
+ if (ret < 0) {
+ error_setg(errp, "Syntax error using priority '%s': %s",
+ priority_name, gnutls_strerror(ret));
+ return;
+ }
+
+ if (s->verbose) {
+ fprintf(stderr, "Cipher suites for %s:\n", priority_name);
+ }
+ for (size_t i = 0;; i++) {
+ 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;
+ }
+ s->cipher_list = g_renew(IANA_TLS_CIPHER,
+ s->cipher_list, s->cipher_count + 1);
+
+ name = gnutls_cipher_suite_info(idx,
+ s->cipher_list[s->cipher_count].data,
+ NULL, NULL, NULL, &version);
+ if (name != NULL) {
+ if (s->verbose) {
+ fprintf(stderr, "- %-50s\t0x%02x, 0x%02x\t%s\n", name,
+ s->cipher_list[s->cipher_count].data[0],
+ s->cipher_list[s->cipher_count].data[1],
+ gnutls_protocol_get_name(version));
+ }
+ s->cipher_count++;
+ }
+ }
+ if (s->verbose) {
+ fprintf(stderr, "total: %u ciphers\n", s->cipher_count);
+ }
+ gnutls_priority_deinit(pcache);
+#else
+ error_setg(errp, "GNU TLS not available");
+#endif /* CONFIG_GNUTLS */
+}
+
+static void qcrypto_tls_cipher_suites_complete(UserCreatable *uc, Error **errp)
+{
+ QCryptoTLSCreds *s = QCRYPTO_TLS_CREDS(uc);
+
+ if (!s->priority) {
+ error_setg(errp, "'priority' property is not set");
+ return;
+ }
+ parse_cipher_suites(QCRYPTO_TLS_CIPHER_SUITES(s), s->priority, errp);
+}
+
+static void qcrypto_tls_cipher_suites_set_verbose(Object *obj, bool value,
+ Error **errp G_GNUC_UNUSED)
+{
+ QCRYPTO_TLS_CIPHER_SUITES(obj)->verbose = value;
+}
+
+
+static bool qcrypto_tls_cipher_suites_get_verbose(Object *obj,
+ Error **errp G_GNUC_UNUSED)
+{
+ return QCRYPTO_TLS_CIPHER_SUITES(obj)->verbose;
+}
+
+static void qcrypto_tls_cipher_suites_finalize(Object *obj)
+{
+ QCryptoTLSCipherSuites *s = QCRYPTO_TLS_CIPHER_SUITES(obj);
+
+ g_free(s->cipher_list);
+}
+
+static void qcrypto_tls_cipher_suites_class_init(ObjectClass *oc, void *data)
+{
+ UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+
+ ucc->complete = qcrypto_tls_cipher_suites_complete;
+
+ object_class_property_add_bool(oc, "verbose",
+ qcrypto_tls_cipher_suites_get_verbose,
+ qcrypto_tls_cipher_suites_set_verbose);
+}
+
+static const TypeInfo qcrypto_tls_cipher_suites_info = {
+ .parent = TYPE_QCRYPTO_TLS_CREDS,
+ .name = TYPE_QCRYPTO_TLS_CIPHER_SUITES,
+ .instance_size = sizeof(QCryptoTLSCipherSuites),
+ .instance_finalize = qcrypto_tls_cipher_suites_finalize,
+ .class_size = sizeof(QCryptoTLSCredsClass),
+ .class_init = qcrypto_tls_cipher_suites_class_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_USER_CREATABLE },
+ { }
+ }
+};
+
+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/Makefile.objs b/crypto/Makefile.objs
index c2a371b0b4..ce706d322a 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-y += tls-cipher-suites.o
crypto-obj-y += tlscreds.o
crypto-obj-y += tlscredsanon.o
crypto-obj-y += tlscredspsk.o
--
2.21.3
