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// Copyright © 2020 rsiddharth <s@ricketyspace.net>
// SPDX-License-Identifier: ISC
package lib
import "crypto/rand"
type Profile map[string]string
var webSessionEncryptionKey []byte = make([]byte, 16)
var webUidCounter int64
var webUserProfiles map[string]Profile = make(map[string]Profile, 0)
func init() {
_, err := rand.Read(webSessionEncryptionKey)
if err != nil {
panic(err)
}
webUidCounter = 10000
}
func WebGenUid() int64 {
uid := webUidCounter
webUidCounter += 1
return uid
}
func WebParseKeyValue(encoded string) map[string]string {
m := make(map[string]string, 0)
kvs := StrSplitAt('&', encoded)
for i := 0; i < len(kvs); i++ {
kv := StrSplitAt('=', kvs[i])
m[StripSpaceChars(kv[0])] = kv[1]
}
return m
}
func WebProfileFor(email string) string {
e := WebSanitizeEmail(email)
if len(e) == 0 {
panic("email invalid")
}
if p, ok := webUserProfiles[e]; ok {
// Profile already exists.
return WebEncodeProfile(p)
}
// Create profile.
p := make(Profile, 0)
p["email"] = e
p["uid"] = NumToStr(WebGenUid())
p["role"] = "user"
webUserProfiles[e] = p
return WebEncodeProfile(p)
}
func WebEncodeProfile(p Profile) string {
ep := "email=" + p["email"] // Encoded profile.
ep += "&uid=" + p["uid"]
ep += "&role=" + p["role"]
return ep
}
func WebDecodeProfile(encoded string) Profile {
return WebParseKeyValue(encoded)
}
func WebEncryptProfile(encoded string) []byte {
return AESEncryptECB(StrToBytes(encoded), webSessionEncryptionKey)
}
func WebDecryptProfile(cipher []byte) string {
return BytesToStr(AESDecryptECB(cipher, webSessionEncryptionKey))
}
func WebSanitizeEmail(email string) string {
if len(email) < 1 {
return ""
}
se := "" // sanitized email
// Strip meta characters
for i := 0; i < len(email); i++ {
if email[i] == '&' || email[i] == '=' {
continue
}
se += string(email[i])
}
return se
}
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