mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-12-30 23:15:42 +00:00
2f33fe86f5
* Update dependencies and build to go1.22 * Fix api changes wrt to dependencies * Update golangci config
104 lines
2.7 KiB
Go
104 lines
2.7 KiB
Go
// SPDX-License-Identifier: MIT
|
|
// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
|
|
|
|
package middleware
|
|
|
|
import (
|
|
"bufio"
|
|
"crypto/rand"
|
|
"io"
|
|
"strings"
|
|
"sync"
|
|
)
|
|
|
|
func matchScheme(domain, pattern string) bool {
|
|
didx := strings.Index(domain, ":")
|
|
pidx := strings.Index(pattern, ":")
|
|
return didx != -1 && pidx != -1 && domain[:didx] == pattern[:pidx]
|
|
}
|
|
|
|
// matchSubdomain compares authority with wildcard
|
|
func matchSubdomain(domain, pattern string) bool {
|
|
if !matchScheme(domain, pattern) {
|
|
return false
|
|
}
|
|
didx := strings.Index(domain, "://")
|
|
pidx := strings.Index(pattern, "://")
|
|
if didx == -1 || pidx == -1 {
|
|
return false
|
|
}
|
|
domAuth := domain[didx+3:]
|
|
// to avoid long loop by invalid long domain
|
|
if len(domAuth) > 253 {
|
|
return false
|
|
}
|
|
patAuth := pattern[pidx+3:]
|
|
|
|
domComp := strings.Split(domAuth, ".")
|
|
patComp := strings.Split(patAuth, ".")
|
|
for i := len(domComp)/2 - 1; i >= 0; i-- {
|
|
opp := len(domComp) - 1 - i
|
|
domComp[i], domComp[opp] = domComp[opp], domComp[i]
|
|
}
|
|
for i := len(patComp)/2 - 1; i >= 0; i-- {
|
|
opp := len(patComp) - 1 - i
|
|
patComp[i], patComp[opp] = patComp[opp], patComp[i]
|
|
}
|
|
|
|
for i, v := range domComp {
|
|
if len(patComp) <= i {
|
|
return false
|
|
}
|
|
p := patComp[i]
|
|
if p == "*" {
|
|
return true
|
|
}
|
|
if p != v {
|
|
return false
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// https://tip.golang.org/doc/go1.19#:~:text=Read%20no%20longer%20buffers%20random%20data%20obtained%20from%20the%20operating%20system%20between%20calls
|
|
var randomReaderPool = sync.Pool{New: func() interface{} {
|
|
return bufio.NewReader(rand.Reader)
|
|
}}
|
|
|
|
const randomStringCharset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
|
|
const randomStringCharsetLen = 52 // len(randomStringCharset)
|
|
const randomStringMaxByte = 255 - (256 % randomStringCharsetLen)
|
|
|
|
func randomString(length uint8) string {
|
|
reader := randomReaderPool.Get().(*bufio.Reader)
|
|
defer randomReaderPool.Put(reader)
|
|
|
|
b := make([]byte, length)
|
|
r := make([]byte, length+(length/4)) // perf: avoid read from rand.Reader many times
|
|
var i uint8 = 0
|
|
|
|
// security note:
|
|
// we can't just simply do b[i]=randomStringCharset[rb%len(randomStringCharset)],
|
|
// len(len(randomStringCharset)) is 52, and rb is [0, 255], 256 = 52 * 4 + 48.
|
|
// make the first 48 characters more possibly to be generated then others.
|
|
// So we have to skip bytes when rb > randomStringMaxByte
|
|
|
|
for {
|
|
_, err := io.ReadFull(reader, r)
|
|
if err != nil {
|
|
panic("unexpected error happened when reading from bufio.NewReader(crypto/rand.Reader)")
|
|
}
|
|
for _, rb := range r {
|
|
if rb > randomStringMaxByte {
|
|
// Skip this number to avoid bias.
|
|
continue
|
|
}
|
|
b[i] = randomStringCharset[rb%randomStringCharsetLen]
|
|
i++
|
|
if i == length {
|
|
return string(b)
|
|
}
|
|
}
|
|
}
|
|
}
|