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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /net/ceph/auth.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/ceph/auth.c')
-rw-r--r--net/ceph/auth.c659
1 files changed, 659 insertions, 0 deletions
diff --git a/net/ceph/auth.c b/net/ceph/auth.c
new file mode 100644
index 000000000..d38c9eadb
--- /dev/null
+++ b/net/ceph/auth.c
@@ -0,0 +1,659 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/ceph/ceph_debug.h>
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <linux/ceph/types.h>
+#include <linux/ceph/decode.h>
+#include <linux/ceph/libceph.h>
+#include <linux/ceph/messenger.h>
+#include "auth_none.h"
+#include "auth_x.h"
+
+
+/*
+ * get protocol handler
+ */
+static u32 supported_protocols[] = {
+ CEPH_AUTH_NONE,
+ CEPH_AUTH_CEPHX
+};
+
+static int init_protocol(struct ceph_auth_client *ac, int proto)
+{
+ dout("%s proto %d\n", __func__, proto);
+
+ switch (proto) {
+ case CEPH_AUTH_NONE:
+ return ceph_auth_none_init(ac);
+ case CEPH_AUTH_CEPHX:
+ return ceph_x_init(ac);
+ default:
+ pr_err("bad auth protocol %d\n", proto);
+ return -EINVAL;
+ }
+}
+
+void ceph_auth_set_global_id(struct ceph_auth_client *ac, u64 global_id)
+{
+ dout("%s global_id %llu\n", __func__, global_id);
+
+ if (!global_id)
+ pr_err("got zero global_id\n");
+
+ if (ac->global_id && global_id != ac->global_id)
+ pr_err("global_id changed from %llu to %llu\n", ac->global_id,
+ global_id);
+
+ ac->global_id = global_id;
+}
+
+/*
+ * setup, teardown.
+ */
+struct ceph_auth_client *ceph_auth_init(const char *name,
+ const struct ceph_crypto_key *key,
+ const int *con_modes)
+{
+ struct ceph_auth_client *ac;
+
+ ac = kzalloc(sizeof(*ac), GFP_NOFS);
+ if (!ac)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&ac->mutex);
+ ac->negotiating = true;
+ if (name)
+ ac->name = name;
+ else
+ ac->name = CEPH_AUTH_NAME_DEFAULT;
+ ac->key = key;
+ ac->preferred_mode = con_modes[0];
+ ac->fallback_mode = con_modes[1];
+
+ dout("%s name '%s' preferred_mode %d fallback_mode %d\n", __func__,
+ ac->name, ac->preferred_mode, ac->fallback_mode);
+ return ac;
+}
+
+void ceph_auth_destroy(struct ceph_auth_client *ac)
+{
+ dout("auth_destroy %p\n", ac);
+ if (ac->ops)
+ ac->ops->destroy(ac);
+ kfree(ac);
+}
+
+/*
+ * Reset occurs when reconnecting to the monitor.
+ */
+void ceph_auth_reset(struct ceph_auth_client *ac)
+{
+ mutex_lock(&ac->mutex);
+ dout("auth_reset %p\n", ac);
+ if (ac->ops && !ac->negotiating)
+ ac->ops->reset(ac);
+ ac->negotiating = true;
+ mutex_unlock(&ac->mutex);
+}
+
+/*
+ * EntityName, not to be confused with entity_name_t
+ */
+int ceph_auth_entity_name_encode(const char *name, void **p, void *end)
+{
+ int len = strlen(name);
+
+ if (*p + 2*sizeof(u32) + len > end)
+ return -ERANGE;
+ ceph_encode_32(p, CEPH_ENTITY_TYPE_CLIENT);
+ ceph_encode_32(p, len);
+ ceph_encode_copy(p, name, len);
+ return 0;
+}
+
+/*
+ * Initiate protocol negotiation with monitor. Include entity name
+ * and list supported protocols.
+ */
+int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len)
+{
+ struct ceph_mon_request_header *monhdr = buf;
+ void *p = monhdr + 1, *end = buf + len, *lenp;
+ int i, num;
+ int ret;
+
+ mutex_lock(&ac->mutex);
+ dout("auth_build_hello\n");
+ monhdr->have_version = 0;
+ monhdr->session_mon = cpu_to_le16(-1);
+ monhdr->session_mon_tid = 0;
+
+ ceph_encode_32(&p, CEPH_AUTH_UNKNOWN); /* no protocol, yet */
+
+ lenp = p;
+ p += sizeof(u32);
+
+ ceph_decode_need(&p, end, 1 + sizeof(u32), bad);
+ ceph_encode_8(&p, 1);
+ num = ARRAY_SIZE(supported_protocols);
+ ceph_encode_32(&p, num);
+ ceph_decode_need(&p, end, num * sizeof(u32), bad);
+ for (i = 0; i < num; i++)
+ ceph_encode_32(&p, supported_protocols[i]);
+
+ ret = ceph_auth_entity_name_encode(ac->name, &p, end);
+ if (ret < 0)
+ goto out;
+ ceph_decode_need(&p, end, sizeof(u64), bad);
+ ceph_encode_64(&p, ac->global_id);
+
+ ceph_encode_32(&lenp, p - lenp - sizeof(u32));
+ ret = p - buf;
+out:
+ mutex_unlock(&ac->mutex);
+ return ret;
+
+bad:
+ ret = -ERANGE;
+ goto out;
+}
+
+static int build_request(struct ceph_auth_client *ac, bool add_header,
+ void *buf, int buf_len)
+{
+ void *end = buf + buf_len;
+ void *p;
+ int ret;
+
+ p = buf;
+ if (add_header) {
+ /* struct ceph_mon_request_header + protocol */
+ ceph_encode_64_safe(&p, end, 0, e_range);
+ ceph_encode_16_safe(&p, end, -1, e_range);
+ ceph_encode_64_safe(&p, end, 0, e_range);
+ ceph_encode_32_safe(&p, end, ac->protocol, e_range);
+ }
+
+ ceph_encode_need(&p, end, sizeof(u32), e_range);
+ ret = ac->ops->build_request(ac, p + sizeof(u32), end);
+ if (ret < 0) {
+ pr_err("auth protocol '%s' building request failed: %d\n",
+ ceph_auth_proto_name(ac->protocol), ret);
+ return ret;
+ }
+ dout(" built request %d bytes\n", ret);
+ ceph_encode_32(&p, ret);
+ return p + ret - buf;
+
+e_range:
+ return -ERANGE;
+}
+
+/*
+ * Handle auth message from monitor.
+ */
+int ceph_handle_auth_reply(struct ceph_auth_client *ac,
+ void *buf, size_t len,
+ void *reply_buf, size_t reply_len)
+{
+ void *p = buf;
+ void *end = buf + len;
+ int protocol;
+ s32 result;
+ u64 global_id;
+ void *payload, *payload_end;
+ int payload_len;
+ char *result_msg;
+ int result_msg_len;
+ int ret = -EINVAL;
+
+ mutex_lock(&ac->mutex);
+ dout("handle_auth_reply %p %p\n", p, end);
+ ceph_decode_need(&p, end, sizeof(u32) * 3 + sizeof(u64), bad);
+ protocol = ceph_decode_32(&p);
+ result = ceph_decode_32(&p);
+ global_id = ceph_decode_64(&p);
+ payload_len = ceph_decode_32(&p);
+ payload = p;
+ p += payload_len;
+ ceph_decode_need(&p, end, sizeof(u32), bad);
+ result_msg_len = ceph_decode_32(&p);
+ result_msg = p;
+ p += result_msg_len;
+ if (p != end)
+ goto bad;
+
+ dout(" result %d '%.*s' gid %llu len %d\n", result, result_msg_len,
+ result_msg, global_id, payload_len);
+
+ payload_end = payload + payload_len;
+
+ if (ac->negotiating) {
+ /* server does not support our protocols? */
+ if (!protocol && result < 0) {
+ ret = result;
+ goto out;
+ }
+ /* set up (new) protocol handler? */
+ if (ac->protocol && ac->protocol != protocol) {
+ ac->ops->destroy(ac);
+ ac->protocol = 0;
+ ac->ops = NULL;
+ }
+ if (ac->protocol != protocol) {
+ ret = init_protocol(ac, protocol);
+ if (ret) {
+ pr_err("auth protocol '%s' init failed: %d\n",
+ ceph_auth_proto_name(protocol), ret);
+ goto out;
+ }
+ }
+
+ ac->negotiating = false;
+ }
+
+ if (result) {
+ pr_err("auth protocol '%s' mauth authentication failed: %d\n",
+ ceph_auth_proto_name(ac->protocol), result);
+ ret = result;
+ goto out;
+ }
+
+ ret = ac->ops->handle_reply(ac, global_id, payload, payload_end,
+ NULL, NULL, NULL, NULL);
+ if (ret == -EAGAIN) {
+ ret = build_request(ac, true, reply_buf, reply_len);
+ goto out;
+ } else if (ret) {
+ goto out;
+ }
+
+out:
+ mutex_unlock(&ac->mutex);
+ return ret;
+
+bad:
+ pr_err("failed to decode auth msg\n");
+ ret = -EINVAL;
+ goto out;
+}
+
+int ceph_build_auth(struct ceph_auth_client *ac,
+ void *msg_buf, size_t msg_len)
+{
+ int ret = 0;
+
+ mutex_lock(&ac->mutex);
+ if (ac->ops->should_authenticate(ac))
+ ret = build_request(ac, true, msg_buf, msg_len);
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+
+int ceph_auth_is_authenticated(struct ceph_auth_client *ac)
+{
+ int ret = 0;
+
+ mutex_lock(&ac->mutex);
+ if (ac->ops)
+ ret = ac->ops->is_authenticated(ac);
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_auth_is_authenticated);
+
+int __ceph_auth_get_authorizer(struct ceph_auth_client *ac,
+ struct ceph_auth_handshake *auth,
+ int peer_type, bool force_new,
+ int *proto, int *pref_mode, int *fallb_mode)
+{
+ int ret;
+
+ mutex_lock(&ac->mutex);
+ if (force_new && auth->authorizer) {
+ ceph_auth_destroy_authorizer(auth->authorizer);
+ auth->authorizer = NULL;
+ }
+ if (!auth->authorizer)
+ ret = ac->ops->create_authorizer(ac, peer_type, auth);
+ else if (ac->ops->update_authorizer)
+ ret = ac->ops->update_authorizer(ac, peer_type, auth);
+ else
+ ret = 0;
+ if (ret)
+ goto out;
+
+ *proto = ac->protocol;
+ if (pref_mode && fallb_mode) {
+ *pref_mode = ac->preferred_mode;
+ *fallb_mode = ac->fallback_mode;
+ }
+
+out:
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(__ceph_auth_get_authorizer);
+
+void ceph_auth_destroy_authorizer(struct ceph_authorizer *a)
+{
+ a->destroy(a);
+}
+EXPORT_SYMBOL(ceph_auth_destroy_authorizer);
+
+int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac,
+ struct ceph_authorizer *a,
+ void *challenge_buf,
+ int challenge_buf_len)
+{
+ int ret = 0;
+
+ mutex_lock(&ac->mutex);
+ if (ac->ops && ac->ops->add_authorizer_challenge)
+ ret = ac->ops->add_authorizer_challenge(ac, a, challenge_buf,
+ challenge_buf_len);
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_auth_add_authorizer_challenge);
+
+int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
+ struct ceph_authorizer *a,
+ void *reply, int reply_len,
+ u8 *session_key, int *session_key_len,
+ u8 *con_secret, int *con_secret_len)
+{
+ int ret = 0;
+
+ mutex_lock(&ac->mutex);
+ if (ac->ops && ac->ops->verify_authorizer_reply)
+ ret = ac->ops->verify_authorizer_reply(ac, a,
+ reply, reply_len, session_key, session_key_len,
+ con_secret, con_secret_len);
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(ceph_auth_verify_authorizer_reply);
+
+void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac, int peer_type)
+{
+ mutex_lock(&ac->mutex);
+ if (ac->ops && ac->ops->invalidate_authorizer)
+ ac->ops->invalidate_authorizer(ac, peer_type);
+ mutex_unlock(&ac->mutex);
+}
+EXPORT_SYMBOL(ceph_auth_invalidate_authorizer);
+
+/*
+ * msgr2 authentication
+ */
+
+static bool contains(const int *arr, int cnt, int val)
+{
+ int i;
+
+ for (i = 0; i < cnt; i++) {
+ if (arr[i] == val)
+ return true;
+ }
+
+ return false;
+}
+
+static int encode_con_modes(void **p, void *end, int pref_mode, int fallb_mode)
+{
+ WARN_ON(pref_mode == CEPH_CON_MODE_UNKNOWN);
+ if (fallb_mode != CEPH_CON_MODE_UNKNOWN) {
+ ceph_encode_32_safe(p, end, 2, e_range);
+ ceph_encode_32_safe(p, end, pref_mode, e_range);
+ ceph_encode_32_safe(p, end, fallb_mode, e_range);
+ } else {
+ ceph_encode_32_safe(p, end, 1, e_range);
+ ceph_encode_32_safe(p, end, pref_mode, e_range);
+ }
+
+ return 0;
+
+e_range:
+ return -ERANGE;
+}
+
+/*
+ * Similar to ceph_auth_build_hello().
+ */
+int ceph_auth_get_request(struct ceph_auth_client *ac, void *buf, int buf_len)
+{
+ int proto = ac->key ? CEPH_AUTH_CEPHX : CEPH_AUTH_NONE;
+ void *end = buf + buf_len;
+ void *lenp;
+ void *p;
+ int ret;
+
+ mutex_lock(&ac->mutex);
+ if (ac->protocol == CEPH_AUTH_UNKNOWN) {
+ ret = init_protocol(ac, proto);
+ if (ret) {
+ pr_err("auth protocol '%s' init failed: %d\n",
+ ceph_auth_proto_name(proto), ret);
+ goto out;
+ }
+ } else {
+ WARN_ON(ac->protocol != proto);
+ ac->ops->reset(ac);
+ }
+
+ p = buf;
+ ceph_encode_32_safe(&p, end, ac->protocol, e_range);
+ ret = encode_con_modes(&p, end, ac->preferred_mode, ac->fallback_mode);
+ if (ret)
+ goto out;
+
+ lenp = p;
+ p += 4; /* space for len */
+
+ ceph_encode_8_safe(&p, end, CEPH_AUTH_MODE_MON, e_range);
+ ret = ceph_auth_entity_name_encode(ac->name, &p, end);
+ if (ret)
+ goto out;
+
+ ceph_encode_64_safe(&p, end, ac->global_id, e_range);
+ ceph_encode_32(&lenp, p - lenp - 4);
+ ret = p - buf;
+
+out:
+ mutex_unlock(&ac->mutex);
+ return ret;
+
+e_range:
+ ret = -ERANGE;
+ goto out;
+}
+
+int ceph_auth_handle_reply_more(struct ceph_auth_client *ac, void *reply,
+ int reply_len, void *buf, int buf_len)
+{
+ int ret;
+
+ mutex_lock(&ac->mutex);
+ ret = ac->ops->handle_reply(ac, 0, reply, reply + reply_len,
+ NULL, NULL, NULL, NULL);
+ if (ret == -EAGAIN)
+ ret = build_request(ac, false, buf, buf_len);
+ else
+ WARN_ON(ret >= 0);
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+
+int ceph_auth_handle_reply_done(struct ceph_auth_client *ac,
+ u64 global_id, void *reply, int reply_len,
+ u8 *session_key, int *session_key_len,
+ u8 *con_secret, int *con_secret_len)
+{
+ int ret;
+
+ mutex_lock(&ac->mutex);
+ ret = ac->ops->handle_reply(ac, global_id, reply, reply + reply_len,
+ session_key, session_key_len,
+ con_secret, con_secret_len);
+ WARN_ON(ret == -EAGAIN || ret > 0);
+ mutex_unlock(&ac->mutex);
+ return ret;
+}
+
+bool ceph_auth_handle_bad_method(struct ceph_auth_client *ac,
+ int used_proto, int result,
+ const int *allowed_protos, int proto_cnt,
+ const int *allowed_modes, int mode_cnt)
+{
+ mutex_lock(&ac->mutex);
+ WARN_ON(used_proto != ac->protocol);
+
+ if (result == -EOPNOTSUPP) {
+ if (!contains(allowed_protos, proto_cnt, ac->protocol)) {
+ pr_err("auth protocol '%s' not allowed\n",
+ ceph_auth_proto_name(ac->protocol));
+ goto not_allowed;
+ }
+ if (!contains(allowed_modes, mode_cnt, ac->preferred_mode) &&
+ (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN ||
+ !contains(allowed_modes, mode_cnt, ac->fallback_mode))) {
+ pr_err("preferred mode '%s' not allowed\n",
+ ceph_con_mode_name(ac->preferred_mode));
+ if (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN)
+ pr_err("no fallback mode\n");
+ else
+ pr_err("fallback mode '%s' not allowed\n",
+ ceph_con_mode_name(ac->fallback_mode));
+ goto not_allowed;
+ }
+ }
+
+ WARN_ON(result == -EOPNOTSUPP || result >= 0);
+ pr_err("auth protocol '%s' msgr authentication failed: %d\n",
+ ceph_auth_proto_name(ac->protocol), result);
+
+ mutex_unlock(&ac->mutex);
+ return true;
+
+not_allowed:
+ mutex_unlock(&ac->mutex);
+ return false;
+}
+
+int ceph_auth_get_authorizer(struct ceph_auth_client *ac,
+ struct ceph_auth_handshake *auth,
+ int peer_type, void *buf, int *buf_len)
+{
+ void *end = buf + *buf_len;
+ int pref_mode, fallb_mode;
+ int proto;
+ void *p;
+ int ret;
+
+ ret = __ceph_auth_get_authorizer(ac, auth, peer_type, true, &proto,
+ &pref_mode, &fallb_mode);
+ if (ret)
+ return ret;
+
+ p = buf;
+ ceph_encode_32_safe(&p, end, proto, e_range);
+ ret = encode_con_modes(&p, end, pref_mode, fallb_mode);
+ if (ret)
+ return ret;
+
+ ceph_encode_32_safe(&p, end, auth->authorizer_buf_len, e_range);
+ *buf_len = p - buf;
+ return 0;
+
+e_range:
+ return -ERANGE;
+}
+EXPORT_SYMBOL(ceph_auth_get_authorizer);
+
+int ceph_auth_handle_svc_reply_more(struct ceph_auth_client *ac,
+ struct ceph_auth_handshake *auth,
+ void *reply, int reply_len,
+ void *buf, int *buf_len)
+{
+ void *end = buf + *buf_len;
+ void *p;
+ int ret;
+
+ ret = ceph_auth_add_authorizer_challenge(ac, auth->authorizer,
+ reply, reply_len);
+ if (ret)
+ return ret;
+
+ p = buf;
+ ceph_encode_32_safe(&p, end, auth->authorizer_buf_len, e_range);
+ *buf_len = p - buf;
+ return 0;
+
+e_range:
+ return -ERANGE;
+}
+EXPORT_SYMBOL(ceph_auth_handle_svc_reply_more);
+
+int ceph_auth_handle_svc_reply_done(struct ceph_auth_client *ac,
+ struct ceph_auth_handshake *auth,
+ void *reply, int reply_len,
+ u8 *session_key, int *session_key_len,
+ u8 *con_secret, int *con_secret_len)
+{
+ return ceph_auth_verify_authorizer_reply(ac, auth->authorizer,
+ reply, reply_len, session_key, session_key_len,
+ con_secret, con_secret_len);
+}
+EXPORT_SYMBOL(ceph_auth_handle_svc_reply_done);
+
+bool ceph_auth_handle_bad_authorizer(struct ceph_auth_client *ac,
+ int peer_type, int used_proto, int result,
+ const int *allowed_protos, int proto_cnt,
+ const int *allowed_modes, int mode_cnt)
+{
+ mutex_lock(&ac->mutex);
+ WARN_ON(used_proto != ac->protocol);
+
+ if (result == -EOPNOTSUPP) {
+ if (!contains(allowed_protos, proto_cnt, ac->protocol)) {
+ pr_err("auth protocol '%s' not allowed by %s\n",
+ ceph_auth_proto_name(ac->protocol),
+ ceph_entity_type_name(peer_type));
+ goto not_allowed;
+ }
+ if (!contains(allowed_modes, mode_cnt, ac->preferred_mode) &&
+ (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN ||
+ !contains(allowed_modes, mode_cnt, ac->fallback_mode))) {
+ pr_err("preferred mode '%s' not allowed by %s\n",
+ ceph_con_mode_name(ac->preferred_mode),
+ ceph_entity_type_name(peer_type));
+ if (ac->fallback_mode == CEPH_CON_MODE_UNKNOWN)
+ pr_err("no fallback mode\n");
+ else
+ pr_err("fallback mode '%s' not allowed by %s\n",
+ ceph_con_mode_name(ac->fallback_mode),
+ ceph_entity_type_name(peer_type));
+ goto not_allowed;
+ }
+ }
+
+ WARN_ON(result == -EOPNOTSUPP || result >= 0);
+ pr_err("auth protocol '%s' authorization to %s failed: %d\n",
+ ceph_auth_proto_name(ac->protocol),
+ ceph_entity_type_name(peer_type), result);
+
+ if (ac->ops->invalidate_authorizer)
+ ac->ops->invalidate_authorizer(ac, peer_type);
+
+ mutex_unlock(&ac->mutex);
+ return true;
+
+not_allowed:
+ mutex_unlock(&ac->mutex);
+ return false;
+}
+EXPORT_SYMBOL(ceph_auth_handle_bad_authorizer);