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etcdctl/ctlv3: auth: wildcard terminated paths specify ranges.
Implement wildcard '*' for get and del. When '*' is the last symbol in a key, the key is converted to a prefix range. The wildcard may only appear as the last symbol in a key. Also: fix several fencepost bugs fixed in the range sorting/merge code, including one incorrect test in auth/range_perm_cache_test.go Fixes etcd-io#6359
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| package etcdserverpb | ||
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| // See github.com/coreos/etcd/wildcard/wildcard.go | ||
| // for the definition of the BegEndRange interface. | ||
| // The methods allow a uniform treatment of ranges. | ||
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| // GetBeg implements part of the BegEndRange interface. | ||
| func (r *RangeRequest) GetBeg() []byte { | ||
| return r.Key | ||
| } | ||
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| // SetBeg implements part of the BegEndRange interface. | ||
| func (r *RangeRequest) SetBeg(beg []byte) { | ||
| r.Key = beg | ||
| } | ||
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| // GetEnd implements part of the BegEndRange interface. | ||
| func (r *RangeRequest) GetEnd() []byte { | ||
| return r.RangeEnd | ||
| } | ||
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| // SetEnd implements part of the BegEndRange interface. | ||
| func (r *RangeRequest) SetEnd(end []byte) { | ||
| r.RangeEnd = end | ||
| } | ||
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| // GetBeg implements part of the BegEndRange interface. | ||
| func (r *DeleteRangeRequest) GetBeg() []byte { | ||
| return r.Key | ||
| } | ||
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| // SetBeg implements part of the BegEndRange interface. | ||
| func (r *DeleteRangeRequest) SetBeg(beg []byte) { | ||
| r.Key = beg | ||
| } | ||
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| // GetEnd implements part of the BegEndRange interface. | ||
| func (r *DeleteRangeRequest) GetEnd() []byte { | ||
| return r.RangeEnd | ||
| } | ||
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| // SetEnd implements part of the BegEndRange interface. | ||
| func (r *DeleteRangeRequest) SetEnd(end []byte) { | ||
| r.RangeEnd = end | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Copyright 2016 The etcd Authors | ||
| // | ||
| // 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. | ||
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| /* | ||
| The wildcard package provides support for converting | ||
| single keys ending in the '*' star wildcard character into | ||
| prefix ranges. Backslash escaped '\*' stars are ignored. | ||
| */ | ||
| package wildcard | ||
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| // ExpandWildcardToRange enables get '*' to return all | ||
| // keys within the range specified by a prefix. | ||
| // | ||
| // Example: get '/home/user/*' will return all keys with | ||
| // the prefix '/home/user/'. | ||
| // | ||
| // Returns true if conversion/expansion took place. | ||
| // | ||
| // If removeWild is true, then we will remove the wildcard byte | ||
| // before creating the range. | ||
| // Backslash escaped (e.g. `\*`) wildcards will not be changed. | ||
| // | ||
| func ExpandWildcardToRange(r BegEndRange, removeWild bool) bool { | ||
| beg := r.GetBeg() | ||
| end := r.GetEnd() | ||
| lenkey := len(beg) | ||
| lenend := len(end) | ||
| if lenkey == 0 || lenend > 0 { | ||
| return false | ||
| } | ||
| if beg[lenkey-1] != '*' { | ||
| return false | ||
| } | ||
| if lenkey == 1 { | ||
| // request for all keys | ||
| beg = []byte{0} | ||
| end = []byte{0} | ||
| r.SetBeg(beg) | ||
| r.SetEnd(end) | ||
| return true | ||
| } | ||
| if beg[lenkey-2] == '\\' { | ||
| // the star was escaped with a backslash: \* | ||
| return false | ||
| } | ||
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| // we have a wildcard query, with keylen >= 2. | ||
| // Fix the begin and end: | ||
| if removeWild { | ||
| beg = beg[:lenkey-1] // remove the '*' | ||
| } | ||
| // setting RangeEnd one bit higher makes a prefix query | ||
| end = make([]byte, lenkey-1) | ||
| copy(end, beg) | ||
| end[lenkey-2]++ | ||
| // check for overflow | ||
| if end[lenkey-2] == 0 { | ||
| // yep, overflowed. | ||
| end = append(end, 1) | ||
| } | ||
| r.SetBeg(beg) | ||
| r.SetEnd(end) | ||
| return true | ||
| } | ||
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| // BegEndRange unifies rangePerm, pb.RangeRequest, | ||
| // and pb.DeleteRangeRequest | ||
| type BegEndRange interface { | ||
| GetBeg() []byte | ||
| SetBeg(beg []byte) | ||
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| GetEnd() []byte | ||
| SetEnd(end []byte) | ||
| } |