// Copyright 2017 The casbin Authors. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package util import ( "net" "regexp" "strings" "github.com/casbin/casbin/rbac" ) // KeyMatch determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *. // For example, "/foo/bar" matches "/foo/*" func KeyMatch(key1 string, key2 string) bool { i := strings.Index(key2, "*") if i == -1 { return key1 == key2 } if len(key1) > i { return key1[:i] == key2[:i] } return key1 == key2[:i] } // KeyMatchFunc is the wrapper for KeyMatch. func KeyMatchFunc(args ...interface{}) (interface{}, error) { name1 := args[0].(string) name2 := args[1].(string) return (bool)(KeyMatch(name1, name2)), nil } // KeyMatch2 determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *. // For example, "/foo/bar" matches "/foo/*", "/resource1" matches "/:resource" func KeyMatch2(key1 string, key2 string) bool { key2 = strings.Replace(key2, "/*", "/.*", -1) re := regexp.MustCompile(`(.*):[^/]+(.*)`) for { if !strings.Contains(key2, "/:") { break } key2 = "^" + re.ReplaceAllString(key2, "$1[^/]+$2") + "$" } return RegexMatch(key1, key2) } // KeyMatch2Func is the wrapper for KeyMatch2. func KeyMatch2Func(args ...interface{}) (interface{}, error) { name1 := args[0].(string) name2 := args[1].(string) return (bool)(KeyMatch2(name1, name2)), nil } // KeyMatch3 determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *. // For example, "/foo/bar" matches "/foo/*", "/resource1" matches "/{resource}" func KeyMatch3(key1 string, key2 string) bool { key2 = strings.Replace(key2, "/*", "/.*", -1) re := regexp.MustCompile(`(.*)\{[^/]+\}(.*)`) for { if !strings.Contains(key2, "/{") { break } key2 = re.ReplaceAllString(key2, "$1[^/]+$2") } return RegexMatch(key1, key2) } // KeyMatch3Func is the wrapper for KeyMatch3. func KeyMatch3Func(args ...interface{}) (interface{}, error) { name1 := args[0].(string) name2 := args[1].(string) return (bool)(KeyMatch3(name1, name2)), nil } // RegexMatch determines whether key1 matches the pattern of key2 in regular expression. func RegexMatch(key1 string, key2 string) bool { res, err := regexp.MatchString(key2, key1) if err != nil { panic(err) } return res } // RegexMatchFunc is the wrapper for RegexMatch. func RegexMatchFunc(args ...interface{}) (interface{}, error) { name1 := args[0].(string) name2 := args[1].(string) return (bool)(RegexMatch(name1, name2)), nil } // IPMatch determines whether IP address ip1 matches the pattern of IP address ip2, ip2 can be an IP address or a CIDR pattern. // For example, "192.168.2.123" matches "192.168.2.0/24" func IPMatch(ip1 string, ip2 string) bool { objIP1 := net.ParseIP(ip1) if objIP1 == nil { panic("invalid argument: ip1 in IPMatch() function is not an IP address.") } _, cidr, err := net.ParseCIDR(ip2) if err != nil { objIP2 := net.ParseIP(ip2) if objIP2 == nil { panic("invalid argument: ip2 in IPMatch() function is neither an IP address nor a CIDR.") } return objIP1.Equal(objIP2) } return cidr.Contains(objIP1) } // IPMatchFunc is the wrapper for IPMatch. func IPMatchFunc(args ...interface{}) (interface{}, error) { ip1 := args[0].(string) ip2 := args[1].(string) return (bool)(IPMatch(ip1, ip2)), nil } // GenerateGFunction is the factory method of the g(_, _) function. func GenerateGFunction(rm rbac.RoleManager) func(args ...interface{}) (interface{}, error) { return func(args ...interface{}) (interface{}, error) { name1 := args[0].(string) name2 := args[1].(string) if rm == nil { return name1 == name2, nil } else if len(args) == 2 { res, _ := rm.HasLink(name1, name2) return res, nil } else { domain := args[2].(string) res, _ := rm.HasLink(name1, name2, domain) return res, nil } } }