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