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671f160746
## What changed? Add a dynamic config to restrict which HTTP `Host` header values are allowed in HTTP API requests. ## Why? Prevent DNS rebinding attacks. ## How did you test it? Added a functional test. --------- Co-authored-by: David Reiss <[email protected]>
62 lines
2.2 KiB
Go
62 lines
2.2 KiB
Go
// The MIT License
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//
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// Copyright (c) 2024 Temporal Technologies Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package util
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import (
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"errors"
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"regexp"
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"strings"
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)
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// WildCardStringToRegexp converts a given string pattern to a regular expression matching wildcards (*) with any
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// substring.
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func WildCardStringToRegexp(pattern string) (*regexp.Regexp, error) {
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if pattern == "" {
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return nil, errors.New("pattern cannot be empty")
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}
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return WildCardStringsToRegexp([]string{pattern})
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}
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// WildCardStringToRegexps converts a given slices of string patterns to a slice of regular expressions matching
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// wildcards (*) with any substring.
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func WildCardStringsToRegexp(patterns []string) (*regexp.Regexp, error) {
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var result strings.Builder
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result.WriteRune('^')
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for i, pattern := range patterns {
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result.WriteRune('(')
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for i, literal := range strings.Split(pattern, "*") {
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if i > 0 {
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// Replace * with .*
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result.WriteString(".*")
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}
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result.WriteString(regexp.QuoteMeta(literal))
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}
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result.WriteRune(')')
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if i < len(patterns)-1 {
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result.WriteRune('|')
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}
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}
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result.WriteRune('$')
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return regexp.Compile(result.String())
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}
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