When trying to add a record with a key that already exists, modify the existing record instead. Also, fix "semanage -m -e" (add_equal was called instead of modify_equal), which meant that existing local equivalency couldn't be modified (though a user could remove it and add a modified equivalency). Fixes: https://github.com/SELinuxProject/selinux/issues/412 When a port or login definition present in the policy is modified using "semanage port -m", "semanage export" exports the command as "port -a" instead of "port -m". This results in "semanage import" failing (port already defined). The same is true for port, user, login, ibpkey, ibendport, node, interface and fcontext. Signed-off-by: Vit Mojzis <vmojzis@xxxxxxxxxx> --- python/semanage/semanage | 2 +- python/semanage/seobject.py | 206 +++++++++++++++++++++++++----------- 2 files changed, 145 insertions(+), 63 deletions(-) diff --git a/python/semanage/semanage b/python/semanage/semanage index 4fdb490f..b269b9fc 100644 --- a/python/semanage/semanage +++ b/python/semanage/semanage @@ -322,7 +322,7 @@ def handleFcontext(args): OBJECT.add(args.file_spec, args.type, args.ftype, args.range, args.seuser) if args.action == "modify": if args.equal: - OBJECT.add_equal(args.file_spec, args.equal) + OBJECT.modify_equal(args.file_spec, args.equal) else: OBJECT.modify(args.file_spec, args.type, args.ftype, args.range, args.seuser) if args.action == "delete": diff --git a/python/semanage/seobject.py b/python/semanage/seobject.py index cc944ae2..dfb15b1d 100644 --- a/python/semanage/seobject.py +++ b/python/semanage/seobject.py @@ -557,11 +557,6 @@ class loginRecords(semanageRecords): if rc < 0: raise ValueError(_("Could not create a key for %s") % name) - (rc, exists) = semanage_seuser_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if login mapping for %s is defined") % name) - if exists: - raise ValueError(_("Login mapping for %s is already defined") % name) if name[0] == '%': try: grp.getgrnam(name[1:]) @@ -600,11 +595,29 @@ class loginRecords(semanageRecords): def add(self, name, sename, serange): try: self.begin() - self.__add(name, sename, serange) + # Add a new mapping, or modify an existing one + if self.__exists(name): + print(_("Login mapping for %s is already defined, modifying instead") % name) + self.__modify(name, sename, serange) + else: + self.__add(name, sename, serange) self.commit() except ValueError as error: raise error + # check if login mapping for given user exists + def __exists(self, name): + (rc, k) = semanage_seuser_key_create(self.sh, name) + if rc < 0: + raise ValueError(_("Could not create a key for %s") % name) + + (rc, exists) = semanage_seuser_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if login mapping for %s is defined") % name) + semanage_seuser_key_free(k) + + return exists + def __modify(self, name, sename="", serange=""): rec, self.oldsename, self.oldserange = selinux.getseuserbyname(name) if sename == "" and serange == "": @@ -821,12 +834,6 @@ class seluserRecords(semanageRecords): if rc < 0: raise ValueError(_("Could not create a key for %s") % name) - (rc, exists) = semanage_user_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if SELinux user %s is defined") % name) - if exists: - raise ValueError(_("SELinux user %s is already defined") % name) - (rc, u) = semanage_user_create(self.sh) if rc < 0: raise ValueError(_("Could not create SELinux user for %s") % name) @@ -866,12 +873,28 @@ class seluserRecords(semanageRecords): def add(self, name, roles, selevel, serange, prefix): try: self.begin() - self.__add(name, roles, selevel, serange, prefix) + if self.__exists(name): + print(_("SELinux user %s is already defined, modifying instead") % name) + self.__modify(name, roles, selevel, serange, prefix) + else: + self.__add(name, roles, selevel, serange, prefix) self.commit() except ValueError as error: self.mylog.commit(0) raise error + def __exists(self, name): + (rc, k) = semanage_user_key_create(self.sh, name) + if rc < 0: + raise ValueError(_("Could not create a key for %s") % name) + + (rc, exists) = semanage_user_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if SELinux user %s is defined") % name) + semanage_user_key_free(k) + + return exists + def __modify(self, name, roles=[], selevel="", serange="", prefix=""): oldserole = "" oldserange = "" @@ -1103,12 +1126,6 @@ class portRecords(semanageRecords): (k, proto_d, low, high) = self.__genkey(port, proto) - (rc, exists) = semanage_port_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if port {proto}/{port} is defined").format(proto=proto, port=port)) - if exists: - raise ValueError(_("Port {proto}/{port} already defined").format(proto=proto, port=port)) - (rc, p) = semanage_port_create(self.sh) if rc < 0: raise ValueError(_("Could not create port for {proto}/{port}").format(proto=proto, port=port)) @@ -1152,9 +1169,23 @@ class portRecords(semanageRecords): def add(self, port, proto, serange, type): self.begin() - self.__add(port, proto, serange, type) + if self.__exists(port, proto): + print(_("Port {proto}/{port} already defined, modifying instead").format(proto=proto, port=port)) + self.__modify(port, proto, serange, type) + else: + self.__add(port, proto, serange, type) self.commit() + def __exists(self, port, proto): + (k, proto_d, low, high) = self.__genkey(port, proto) + + (rc, exists) = semanage_port_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if port {proto}/{port} is defined").format(proto=proto, port=port)) + semanage_port_key_free(k) + + return exists + def __modify(self, port, proto, serange, setype): if serange == "" and setype == "": if is_mls_enabled == 1: @@ -1377,12 +1408,6 @@ class ibpkeyRecords(semanageRecords): (k, subnet_prefix, low, high) = self.__genkey(pkey, subnet_prefix) - (rc, exists) = semanage_ibpkey_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if ibpkey {subnet_prefix}/{pkey} is defined").formnat(subnet_prefix=subnet_prefix, pkey=pkey)) - if exists: - raise ValueError(_("ibpkey {subnet_prefix}/{pkey} already defined").format(subnet_prefix=subnet_prefix, pkey=pkey)) - (rc, p) = semanage_ibpkey_create(self.sh) if rc < 0: raise ValueError(_("Could not create ibpkey for {subnet_prefix}/{pkey}").format(subnet_prefix=subnet_prefix, pkey=pkey)) @@ -1424,9 +1449,23 @@ class ibpkeyRecords(semanageRecords): def add(self, pkey, subnet_prefix, serange, type): self.begin() - self.__add(pkey, subnet_prefix, serange, type) + if self.__exists(pkey, subnet_prefix): + print(_("ibpkey {subnet_prefix}/{pkey} already defined, modifying instead").format(subnet_prefix=subnet_prefix, pkey=pkey)) + self.__modify(pkey, subnet_prefix, serange, type) + else: + self.__add(pkey, subnet_prefix, serange, type) self.commit() + def __exists(self, pkey, subnet_prefix): + (k, subnet_prefix, low, high) = self.__genkey(pkey, subnet_prefix) + + (rc, exists) = semanage_ibpkey_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if ibpkey {subnet_prefix}/{pkey} is defined").formnat(subnet_prefix=subnet_prefix, pkey=pkey)) + semanage_ibpkey_key_free(k) + + return exists + def __modify(self, pkey, subnet_prefix, serange, setype): if serange == "" and setype == "": if is_mls_enabled == 1: @@ -1631,12 +1670,6 @@ class ibendportRecords(semanageRecords): raise ValueError(_("Type %s is invalid, must be an ibendport type") % type) (k, ibendport, port) = self.__genkey(ibendport, ibdev_name) - (rc, exists) = semanage_ibendport_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if ibendport {ibdev_name}/{port} is defined").format(ibdev_name=ibdev_name, port=port)) - if exists: - raise ValueError(_("ibendport {ibdev_name}/{port} already defined").format(ibdev_name=ibdev_name, port=port)) - (rc, p) = semanage_ibendport_create(self.sh) if rc < 0: raise ValueError(_("Could not create ibendport for {ibdev_name}/{port}").format(ibdev_name=ibdev_name, port=port)) @@ -1678,9 +1711,23 @@ class ibendportRecords(semanageRecords): def add(self, ibendport, ibdev_name, serange, type): self.begin() - self.__add(ibendport, ibdev_name, serange, type) + if self.__exists(ibendport, ibdev_name): + print(_("ibendport {ibdev_name}/{port} already defined, modifying instead").format(ibdev_name=ibdev_name, port=port)) + self.__modify(ibendport, ibdev_name, serange, type) + else: + self.__add(ibendport, ibdev_name, serange, type) self.commit() + def __exists(self, ibendport, ibdev_name): + (k, ibendport, port) = self.__genkey(ibendport, ibdev_name) + + (rc, exists) = semanage_ibendport_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if ibendport {ibdev_name}/{port} is defined").format(ibdev_name=ibdev_name, port=port)) + semanage_ibendport_key_free(k) + + return exists + def __modify(self, ibendport, ibdev_name, serange, setype): if serange == "" and setype == "": if is_mls_enabled == 1: @@ -1902,12 +1949,6 @@ class nodeRecords(semanageRecords): if rc < 0: raise ValueError(_("Could not create key for %s") % addr) - (rc, exists) = semanage_node_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if addr %s is defined") % addr) - if exists: - raise ValueError(_("Addr %s already defined") % addr) - (rc, node) = semanage_node_create(self.sh) if rc < 0: raise ValueError(_("Could not create addr for %s") % addr) @@ -1955,9 +1996,25 @@ class nodeRecords(semanageRecords): def add(self, addr, mask, proto, serange, ctype): self.begin() - self.__add(addr, mask, proto, serange, ctype) + if self.__exists(addr, mask, proto): + print(_("Addr %s already defined, modifying instead") % addr) + self.__modify(addr, mask, proto, serange, ctype) + else: + self.__add(addr, mask, proto, serange, ctype) self.commit() + def __exists(self, addr, mask, proto): + (rc, k) = semanage_node_key_create(self.sh, addr, mask, proto) + if rc < 0: + raise ValueError(_("Could not create key for %s") % addr) + + (rc, exists) = semanage_node_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if addr %s is defined") % addr) + semanage_node_key_free(k) + + return exists + def __modify(self, addr, mask, proto, serange, setype): addr, mask, proto, audit_proto = self.validate(addr, mask, proto) @@ -2111,12 +2168,6 @@ class interfaceRecords(semanageRecords): if rc < 0: raise ValueError(_("Could not create key for %s") % interface) - (rc, exists) = semanage_iface_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if interface %s is defined") % interface) - if exists: - raise ValueError(_("Interface %s already defined") % interface) - (rc, iface) = semanage_iface_create(self.sh) if rc < 0: raise ValueError(_("Could not create interface for %s") % interface) @@ -2163,9 +2214,25 @@ class interfaceRecords(semanageRecords): def add(self, interface, serange, ctype): self.begin() - self.__add(interface, serange, ctype) + if self.__exists(interface): + print(_("Interface %s already defined, modifying instead") % interface) + self.__modify(interface, serange, ctype) + else: + self.__add(interface, serange, ctype) self.commit() + def __exists(self, interface): + (rc, k) = semanage_iface_key_create(self.sh, interface) + if rc < 0: + raise ValueError(_("Could not create key for %s") % interface) + + (rc, exists) = semanage_iface_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if interface %s is defined") % interface) + semanage_iface_key_free(k) + + return exists + def __modify(self, interface, serange, setype): if serange == "" and setype == "": raise ValueError(_("Requires setype or serange")) @@ -2353,7 +2420,13 @@ class fcontextRecords(semanageRecords): raise ValueError(_("Substitute %s is not valid. Substitute is not allowed to end with '/'") % substitute) if target in self.equiv.keys(): - raise ValueError(_("Equivalence class for %s already exists") % target) + print(_("Equivalence class for %s already exists, modifying instead") % target) + self.equiv[target] = substitute + self.equal_ind = True + self.mylog.log_change("resrc=fcontext op=modify-equal %s %s" % (audit.audit_encode_nv_string("sglob", target, 0), audit.audit_encode_nv_string("tglob", substitute, 0))) + self.commit() + return + self.validate(target) for fdict in (self.equiv, self.equiv_dist): @@ -2429,18 +2502,6 @@ class fcontextRecords(semanageRecords): if rc < 0: raise ValueError(_("Could not create key for %s") % target) - (rc, exists) = semanage_fcontext_exists(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if file context for %s is defined") % target) - - if not exists: - (rc, exists) = semanage_fcontext_exists_local(self.sh, k) - if rc < 0: - raise ValueError(_("Could not check if file context for %s is defined") % target) - - if exists: - raise ValueError(_("File context for %s already defined") % target) - (rc, fcontext) = semanage_fcontext_create(self.sh) if rc < 0: raise ValueError(_("Could not create file context for %s") % target) @@ -2479,9 +2540,30 @@ class fcontextRecords(semanageRecords): def add(self, target, type, ftype="", serange="", seuser="system_u"): self.begin() - self.__add(target, type, ftype, serange, seuser) + if self.__exists(target, ftype): + print(_("File context for %s already defined, modifying instead") % target) + self.__modify(target, type, ftype, serange, seuser) + else: + self.__add(target, type, ftype, serange, seuser) self.commit() + def __exists(self, target, ftype): + (rc, k) = semanage_fcontext_key_create(self.sh, target, file_types[ftype]) + if rc < 0: + raise ValueError(_("Could not create key for %s") % target) + + (rc, exists) = semanage_fcontext_exists(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if file context for %s is defined") % target) + + if not exists: + (rc, exists) = semanage_fcontext_exists_local(self.sh, k) + if rc < 0: + raise ValueError(_("Could not check if file context for %s is defined") % target) + semanage_fcontext_key_free(k) + + return exists + def __modify(self, target, setype, ftype, serange, seuser): if serange == "" and setype == "" and seuser == "": raise ValueError(_("Requires setype, serange or seuser")) -- 2.43.0
