sessions: add scopes for acls, default to "ubus" scope
This commit is contained in:
Jo-Philipp Wich
parent
c2c39eeb30
commit
c6e81f4b69
2 changed files with 109 additions and 35 deletions
121
session.c
121
session.c
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@ -57,22 +57,26 @@ static const struct blobmsg_policy get_policy[__RPC_SG_MAX] = {
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enum {
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RPC_SA_SID,
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RPC_SA_SCOPE,
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RPC_SA_OBJECTS,
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__RPC_SA_MAX,
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};
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static const struct blobmsg_policy acl_policy[__RPC_SA_MAX] = {
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[RPC_SA_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
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[RPC_SA_SCOPE] = { .name = "scope", .type = BLOBMSG_TYPE_STRING },
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[RPC_SA_OBJECTS] = { .name = "objects", .type = BLOBMSG_TYPE_ARRAY },
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};
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enum {
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RPC_SP_SID,
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RPC_SP_SCOPE,
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RPC_SP_OBJECT,
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RPC_SP_FUNCTION,
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__RPC_SP_MAX,
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};
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static const struct blobmsg_policy perm_policy[__RPC_SP_MAX] = {
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[RPC_SP_SID] = { .name = "sid", .type = BLOBMSG_TYPE_STRING },
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[RPC_SP_SCOPE] = { .name = "scope", .type = BLOBMSG_TYPE_STRING },
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[RPC_SP_OBJECT] = { .name = "object", .type = BLOBMSG_TYPE_STRING },
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[RPC_SP_FUNCTION] = { .name = "function", .type = BLOBMSG_TYPE_STRING },
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};
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@ -83,14 +87,14 @@ static const struct blobmsg_policy perm_policy[__RPC_SP_MAX] = {
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* equal to the method name, then work backwards as long as the AVL key still
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* matches its counterpart in the object name
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*/
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#define uh_foreach_matching_acl_prefix(_acl, _ses, _obj, _func) \
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for (_acl = avl_find_le_element(&(_ses)->acls, _obj, _acl, avl); \
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#define uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
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for (_acl = avl_find_le_element(_avl, _obj, _acl, avl); \
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_acl; \
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_acl = avl_is_first(&(ses)->acls, &(_acl)->avl) ? NULL : \
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_acl = avl_is_first(_avl, &(_acl)->avl) ? NULL : \
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avl_prev_element((_acl), avl))
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#define uh_foreach_matching_acl(_acl, _ses, _obj, _func) \
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uh_foreach_matching_acl_prefix(_acl, _ses, _obj, _func) \
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#define uh_foreach_matching_acl(_acl, _avl, _obj, _func) \
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uh_foreach_matching_acl_prefix(_acl, _avl, _obj, _func) \
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if (!strncmp((_acl)->object, _obj, (_acl)->sort_len) && \
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!fnmatch((_acl)->object, (_obj), FNM_NOESCAPE) && \
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!fnmatch((_acl)->function, (_func), FNM_NOESCAPE))
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@ -128,21 +132,35 @@ static void
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rpc_session_dump_acls(struct rpc_session *ses, struct blob_buf *b)
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{
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struct rpc_session_acl *acl;
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struct rpc_session_acl_scope *acl_scope;
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const char *lastobj = NULL;
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void *c = NULL;
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const char *lastscope = NULL;
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void *c = NULL, *d = NULL;
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avl_for_each_element(&ses->acls, acl, avl) {
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avl_for_each_element(&ses->acls, acl_scope, avl) {
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if (!lastscope || strcmp(acl_scope->avl.key, lastscope))
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{
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if (c) blobmsg_close_table(b, c);
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c = blobmsg_open_table(b, acl_scope->avl.key);
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}
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d = NULL;
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avl_for_each_element(&acl_scope->acls, acl, avl) {
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if (!lastobj || strcmp(acl->object, lastobj))
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{
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if (c) blobmsg_close_array(b, c);
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c = blobmsg_open_array(b, acl->object);
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if (d) blobmsg_close_array(b, d);
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d = blobmsg_open_array(b, acl->object);
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}
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blobmsg_add_string(b, NULL, acl->function);
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lastobj = acl->object;
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}
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if (c) blobmsg_close_array(b, c);
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if (d) blobmsg_close_array(b, d);
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}
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if (c) blobmsg_close_table(b, c);
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}
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static void
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@ -179,12 +197,19 @@ static void
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rpc_session_destroy(struct rpc_session *ses)
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{
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struct rpc_session_acl *acl, *nacl;
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struct rpc_session_acl_scope *acl_scope, *nacl_scope;
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struct rpc_session_data *data, *ndata;
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uloop_timeout_cancel(&ses->t);
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avl_remove_all_elements(&ses->acls, acl, avl, nacl)
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avl_for_each_element_safe(&ses->acls, acl_scope, avl, nacl_scope) {
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avl_remove_all_elements(&acl_scope->acls, acl, avl, nacl)
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free(acl);
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avl_delete(&ses->acls, &acl_scope->avl);
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free(acl_scope);
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}
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avl_remove_all_elements(&ses->data, data, avl, ndata)
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free(data);
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@ -289,20 +314,37 @@ uh_id_len(const char *str)
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static int
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rpc_session_grant(struct rpc_session *ses, struct ubus_context *ctx,
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const char *object, const char *function)
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const char *scope, const char *object, const char *function)
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{
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struct rpc_session_acl *acl;
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char *new_obj, *new_func, *new_id;
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struct rpc_session_acl_scope *acl_scope;
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char *new_scope, *new_obj, *new_func, *new_id;
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int id_len;
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if (!object || !function)
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return UBUS_STATUS_INVALID_ARGUMENT;
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uh_foreach_matching_acl_prefix(acl, ses, object, function) {
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acl_scope = avl_find_element(&ses->acls, scope, acl_scope, avl);
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if (acl_scope) {
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uh_foreach_matching_acl_prefix(acl, &acl_scope->acls, object, function) {
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if (!strcmp(acl->object, object) &&
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!strcmp(acl->function, function))
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return 0;
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}
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}
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if (!acl_scope) {
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acl_scope = calloc_a(sizeof(*acl_scope),
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&new_scope, strlen(scope) + 1);
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if (!acl_scope)
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return UBUS_STATUS_UNKNOWN_ERROR;
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acl_scope->avl.key = strcpy(new_scope, scope);
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avl_init(&acl_scope->acls, avl_strcmp, true, NULL);
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avl_insert(&ses->acls, &acl_scope->avl);
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}
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id_len = uh_id_len(object);
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acl = calloc_a(sizeof(*acl),
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@ -316,22 +358,30 @@ rpc_session_grant(struct rpc_session *ses, struct ubus_context *ctx,
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acl->object = strcpy(new_obj, object);
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acl->function = strcpy(new_func, function);
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acl->avl.key = strncpy(new_id, object, id_len);
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avl_insert(&ses->acls, &acl->avl);
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avl_insert(&acl_scope->acls, &acl->avl);
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return 0;
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}
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static int
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rpc_session_revoke(struct rpc_session *ses, struct ubus_context *ctx,
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const char *object, const char *function)
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const char *scope, const char *object, const char *function)
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{
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struct rpc_session_acl *acl, *next;
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struct rpc_session_acl_scope *acl_scope;
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int id_len;
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char *id;
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acl_scope = avl_find_element(&ses->acls, scope, acl_scope, avl);
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if (!acl_scope)
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return 0;
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if (!object && !function) {
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avl_remove_all_elements(&ses->acls, acl, avl, next)
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avl_remove_all_elements(&acl_scope->acls, acl, avl, next)
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free(acl);
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avl_delete(&ses->acls, &acl_scope->avl);
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free(acl_scope);
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return 0;
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}
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@ -340,9 +390,9 @@ rpc_session_revoke(struct rpc_session *ses, struct ubus_context *ctx,
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strncpy(id, object, id_len);
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id[id_len] = 0;
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acl = avl_find_element(&ses->acls, id, acl, avl);
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acl = avl_find_element(&acl_scope->acls, id, acl, avl);
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while (acl) {
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if (!avl_is_last(&ses->acls, &acl->avl))
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if (!avl_is_last(&acl_scope->acls, &acl->avl))
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next = avl_next_element(acl, avl);
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else
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next = NULL;
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@ -352,12 +402,17 @@ rpc_session_revoke(struct rpc_session *ses, struct ubus_context *ctx,
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if (!strcmp(acl->object, object) &&
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!strcmp(acl->function, function)) {
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avl_delete(&ses->acls, &acl->avl);
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avl_delete(&acl_scope->acls, &acl->avl);
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free(acl);
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}
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acl = next;
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}
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if (avl_is_empty(&acl_scope->acls)) {
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avl_delete(&ses->acls, &acl_scope->avl);
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free(acl_scope);
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}
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return 0;
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}
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@ -371,10 +426,11 @@ rpc_handle_acl(struct ubus_context *ctx, struct ubus_object *obj,
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struct blob_attr *tb[__RPC_SA_MAX];
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struct blob_attr *attr, *sattr;
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const char *object, *function;
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const char *scope = "ubus";
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int rem1, rem2;
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int (*cb)(struct rpc_session *ses, struct ubus_context *ctx,
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const char *object, const char *function);
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const char *scope, const char *object, const char *function);
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blobmsg_parse(acl_policy, __RPC_SA_MAX, tb, blob_data(msg), blob_len(msg));
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@ -385,13 +441,16 @@ rpc_handle_acl(struct ubus_context *ctx, struct ubus_object *obj,
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if (!ses)
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return UBUS_STATUS_NOT_FOUND;
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if (tb[RPC_SA_SCOPE])
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scope = blobmsg_data(tb[RPC_SA_SCOPE]);
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if (!strcmp(method, "grant"))
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cb = rpc_session_grant;
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else
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cb = rpc_session_revoke;
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if (!tb[RPC_SA_OBJECTS])
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return cb(ses, ctx, NULL, NULL);
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return cb(ses, ctx, scope, NULL, NULL);
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blobmsg_for_each_attr(attr, tb[RPC_SA_OBJECTS], rem1) {
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if (blob_id(attr) != BLOBMSG_TYPE_ARRAY)
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@ -413,19 +472,25 @@ rpc_handle_acl(struct ubus_context *ctx, struct ubus_object *obj,
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}
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if (object && function)
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cb(ses, ctx, object, function);
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cb(ses, ctx, scope, object, function);
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}
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return 0;
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}
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static bool
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rpc_session_acl_allowed(struct rpc_session *ses, const char *obj, const char *fun)
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rpc_session_acl_allowed(struct rpc_session *ses, const char *scope,
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const char *obj, const char *fun)
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{
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struct rpc_session_acl *acl;
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struct rpc_session_acl_scope *acl_scope;
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uh_foreach_matching_acl(acl, ses, obj, fun)
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acl_scope = avl_find_element(&ses->acls, scope, acl_scope, avl);
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if (acl_scope) {
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uh_foreach_matching_acl(acl, &acl_scope->acls, obj, fun)
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return true;
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}
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return false;
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}
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@ -437,6 +502,7 @@ rpc_handle_access(struct ubus_context *ctx, struct ubus_object *obj,
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{
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struct rpc_session *ses;
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struct blob_attr *tb[__RPC_SP_MAX];
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const char *scope = "ubus";
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bool allow;
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blobmsg_parse(perm_policy, __RPC_SP_MAX, tb, blob_data(msg), blob_len(msg));
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@ -448,7 +514,10 @@ rpc_handle_access(struct ubus_context *ctx, struct ubus_object *obj,
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if (!ses)
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return UBUS_STATUS_NOT_FOUND;
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allow = rpc_session_acl_allowed(ses,
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if (tb[RPC_SP_SCOPE])
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scope = blobmsg_data(tb[RPC_SP_SCOPE]);
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allow = rpc_session_acl_allowed(ses, scope,
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blobmsg_data(tb[RPC_SP_OBJECT]),
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blobmsg_data(tb[RPC_SP_FUNCTION]));
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@ -42,6 +42,11 @@ struct rpc_session_data {
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struct blob_attr attr[];
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};
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struct rpc_session_acl_scope {
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struct avl_node avl;
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struct avl_tree acls;
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};
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struct rpc_session_acl {
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struct avl_node avl;
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const char *object;
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