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354 lines
7.9 KiB
354 lines
7.9 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 ceph_auth_init_protocol(struct ceph_auth_client *ac, int protocol) |
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{ |
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switch (protocol) { |
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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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return -ENOENT; |
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} |
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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, const struct ceph_crypto_key *key) |
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{ |
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struct ceph_auth_client *ac; |
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int ret; |
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dout("auth_init name '%s'\n", name); |
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ret = -ENOMEM; |
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ac = kzalloc(sizeof(*ac), GFP_NOFS); |
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if (!ac) |
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goto out; |
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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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dout("auth_init name %s\n", ac->name); |
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ac->key = key; |
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return ac; |
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out: |
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return ERR_PTR(ret); |
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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 ceph_build_auth_request(struct ceph_auth_client *ac, |
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void *msg_buf, size_t msg_len) |
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{ |
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struct ceph_mon_request_header *monhdr = msg_buf; |
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void *p = monhdr + 1; |
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void *end = msg_buf + msg_len; |
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int ret; |
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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, ac->protocol); |
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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("error %d building auth method %s request\n", ret, |
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ac->ops->name); |
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goto out; |
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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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ret = p + ret - msg_buf; |
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out: |
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return ret; |
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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 (global_id && ac->global_id != global_id) { |
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dout(" set global_id %lld -> %lld\n", ac->global_id, global_id); |
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ac->global_id = global_id; |
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} |
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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 = ceph_auth_init_protocol(ac, protocol); |
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if (ret) { |
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pr_err("error %d on auth protocol %d init\n", |
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ret, protocol); |
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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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ret = ac->ops->handle_reply(ac, result, payload, payload_end); |
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if (ret == -EAGAIN) { |
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ret = ceph_build_auth_request(ac, reply_buf, reply_len); |
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} else if (ret) { |
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pr_err("auth method '%s' error %d\n", ac->ops->name, ret); |
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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 = ceph_build_auth_request(ac, 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_create_authorizer(struct ceph_auth_client *ac, |
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int peer_type, |
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struct ceph_auth_handshake *auth) |
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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->create_authorizer) |
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ret = ac->ops->create_authorizer(ac, peer_type, auth); |
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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_create_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_update_authorizer(struct ceph_auth_client *ac, |
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int peer_type, |
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struct ceph_auth_handshake *a) |
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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->update_authorizer) |
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ret = ac->ops->update_authorizer(ac, peer_type, a); |
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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_update_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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{ |
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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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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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