#Requires AutoHotkey v2.0
#Warn LocalSameAsGlobal, Off

LC_Version := "0.0.24.04"

; ==============================================================================
; ASCII / Binary
; ==============================================================================

LC_ASCII2Bin(s, pretty := false) {
    r := ""
    for i, ch in StrSplit(s) {
        byte := Ord(ch), bits := ""
        Loop 8
            bits := ((byte >> (A_Index - 1)) & 1) bits
        r .= bits
        if pretty && i < StrLen(s)
            r .= " "
    }
    return r
}

LC_Ascii2Bin2(Ascii) {
    Out := ""
    for Char in StrSplit(Ascii)
        Loop 8
            Out .= !!(Ord(Char) & (1 << (8 - A_Index)))
    return Out
}

LC_Bin2Ascii(Bin) {
    Bin := RegExReplace(Bin, "[^10]")
    Out := ""
    Loop StrLen(Bin) // 8 {
        val := 0
        for Bit in StrSplit(SubStr(Bin, (A_Index - 1) * 8 + 1, 8))
            val += val + Bit
        Out .= Chr(val)
    }
    return Out
}

; ==============================================================================
; Binary String Encode/Decode (text <-> binary string)
; ==============================================================================

LC_BinStr_EncodeText(Text, Pretty := false, Encoding := "UTF-8") {
    Len := StrPut(Text, Encoding) - 1
    Buf := Buffer(Len)
    StrPut(Text, Buf, Encoding)
    BinStr := ""
    LC_BinStr_Encode(&BinStr, &Buf, Len, Pretty)
    return BinStr
}

LC_BinStr_DecodeText(Text, Encoding := "UTF-8") {
    Len := LC_BinStr_Decode(&Buf, Text)
    return StrGet(Buf, Len, Encoding)
}

LC_BinStr_Encode(&Out, &InBuf, InLen, Pretty := false) {
    Out := ""
    Loop InLen {
        Byte := NumGet(InBuf, A_Index - 1, "UChar")
        Loop 8
            Out .= (Byte >> (8 - A_Index)) & 1
        if Pretty
            Out .= " "
    }
}

LC_BinStr_Decode(&Out, InTxt) {
    InTxt := RegExReplace(InTxt, "[^01]")
    ByteCount := StrLen(InTxt) // 8
    Out := Buffer(ByteCount, 0)
    BitIndex := 1
    Loop ByteCount {
        Byte := 0
        Loop 8 {
            Byte := (Byte << 1) | SubStr(InTxt, BitIndex, 1)
            BitIndex += 1
        }
        NumPut("UChar", Byte, Out, A_Index - 1)
    }
    return ByteCount
}

; ==============================================================================
; ASCII85 (Original + Z85)
; ==============================================================================

LC_ASCII85_Encode(content, variant := "") {
    content := StrReplace(StrReplace(content, "<~"), "~>")
    bytes := []
    for ch in StrSplit(content)
        bytes.Push(Ord(ch))
    variant := __LC_ASCII85_getVariant(variant)
    n := bytes.Length, string := "", i := 1
    while (i <= n) {
        if (i - 1 + 4 > n)
            bytes.Push(0, 0, 0)
        tuple := ((bytes[i] << 24) + (bytes[i + 1] << 16) + (bytes[i + 2] << 8) + bytes[i + 3]) >> 0
        if (variant["zeroTupleChar"] = "null") || (tuple > 0) {
            digits := []
            Loop 5 {
                digits.Push(Mod(tuple, 85))
                tuple := tuple // 85
            }
            newarr := []
            for t_idx, t_val in digits
                newarr.InsertAt(1, t_val)
            digits := newarr
            if (n < (i - 1 + 4))
                digits := __LC_ASCII85_splice(digits, n - (i - 1 + 4), 4)
            for t_k, t_v in digits
                string .= (variant["alphabet"] = "null") ? Chr(t_v + 33) : SubStr(variant["alphabet"], t_v + 1, 1)
        } else {
            string .= variant["zeroTupleChar"]
        }
        i += 4
    }
    return string
}

LC_ASCII85_Decode(content, variant := "") {
    string := Trim(content)
    variant := __LC_ASCII85_getVariant(variant)
    n := StrLen(string)
    bytes := [], i := 1
    while (i <= n) {
        if (SubStr(string, i, 1) = variant.zeroTupleChar) {
            bytes.Push(0, 0, 0, 0)
            i++
        } else {
            digits := []
            for character in StrSplit(SubStr(string, i, 5)) {
                digit := (variant["alphabet"] = "null") ? Ord(character) - 33 : InStr(variant["alphabet"], character) - 1
                if (digit < 0 || digit > 84)
                    throw Error(Format("Invalid character '{1}' at index {2}", character, i + A_Index - 1))
                digits.Push(digit)
            }
            tuple := 0 + digits[1] * 52200625 + digits[2] * 614125 + ((i - 1 + 2 < n) ? digits[3] : 84) * 7225 + ((i - 1 + 3 < n) ? digits[4] : 84) * 85 + ((i - 1 + 4 < n) ? digits[5] : 84)
            tupleBytes := [(tuple >> 24) & 0xFF, (tuple >> 16) & 0xFF, (tuple >> 8) & 0xFF, tuple & 0xFF]
            if (n < i - 1 + 5)
                tupleBytes := __LC_ASCII85_splice(tupleBytes, n - (i - 1 + 5), 5)
            for t_v in tupleBytes
                bytes.Push(t_v)
            i += 5
        }
    }
    decoded := ""
    for v in bytes
        decoded .= Chr(v)
    return decoded
}

__LC_ASCII85_getVariant(variant := "") {
    if InStr(variant, "z")
        return {name:"Z85", label:"Z85 (ZeroMQ)", alphabet:"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-:+=^!/*?&<>()[]{}@%$#", zeroTupleChar:"null"}
    return {name:"original", label:"Original", alphabet:"null", zeroTupleChar:"z"}
}

__LC_ASCII85_splice(arr, start, deleteCount := "") {
    len := arr.Length, newarr := []
    startIndex := start
    if (start > len)
        startIndex := len
    else if (start < 0)
        startIndex := len + start
    if (len + start < 0)
        startIndex := 0
    Loop startIndex
        newarr.Push(arr[A_Index])
    if (deleteCount != "") {
        if (deleteCount < 0)
            deleteCount := 0
        j := 1 + startIndex + deleteCount
        while (j <= len) {
            newarr.Push(arr[j])
            j++
        }
    }
    return newarr
}

; ==============================================================================
; Base64 / Hex via Windows CryptoAPI
; ==============================================================================

LC_Base64_EncodeText(Text, Encoding := "UTF-8") {
    Len := StrPut(Text, Encoding) - 1
    Bin := Buffer(Len)
    StrPut(Text, Bin, Encoding)
    Base64 := ""
    LC_Base64_Encode(&Base64, &Bin, Len)
    return Base64
}

LC_Base64_DecodeText(Text, Encoding := "UTF-8") {
    Len := LC_Base64_Decode(&Bin, Text)
    return StrGet(Bin, Len, Encoding)
}

LC_Base64_Encode(&OutVar, &InVar, InLen) {
    return LC_Bin2Str(&OutVar, &InVar, InLen, 0x40000001)
}

LC_Base64_Decode(&OutVar, InVar) {
    return LC_Str2Bin(&OutVar, InVar, 0x1)
}

LC_Bin2Hex(&OutVar, &InVar, InLen, Pretty := false) {
    return LC_Bin2Str(&OutVar, &InVar, InLen, Pretty ? 0xb : 0x4000000c)
}

LC_Hex2Bin(&OutVar, &InVar) {
    return LC_Str2Bin(&OutVar, &InVar, 0x8)
}

LC_Bin2Str(&OutVar, &InVar, InLen, Flags) {
    OutLen := 0
    DllCall("Crypt32\CryptBinaryToString", "ptr", InVar, "uint", InLen, "uint", Flags, "ptr", 0, "uint*", &OutLen)
    OutVar := Buffer(OutLen * 2)
    DllCall("Crypt32\CryptBinaryToString", "ptr", InVar, "uint", InLen, "uint", Flags, "ptr", OutVar, "uint*", &OutLen)
    return OutLen
}

LC_Str2Bin(&OutVar, InVar, Flags) {
    OutLen := 0
    DllCall("Crypt32\CryptStringToBinary", "ptr", InVar, "uint", StrLen(InVar), "uint", Flags, "ptr", 0, "uint*", &OutLen, "ptr", 0, "ptr", 0)
    OutVar := Buffer(OutLen)
    DllCall("Crypt32\CryptStringToBinary", "ptr", InVar, "uint", StrLen(InVar), "uint", Flags, "ptr", OutVar, "uint*", &OutLen, "ptr", 0, "ptr", 0)
    return OutLen
}

; ==============================================================================
; Caesar / ROT
; ==============================================================================

LC_Caesar(string, num := 2) {
    ret := ""
    for ch in StrSplit(string) {
        c := Ord(ch)
        if (c > 64 && c < 91)
            ret .= Chr(Mod(c - 65 + num, 26) + 65)
        else if (c > 96 && c < 123)
            ret .= Chr(Mod(c - 97 + num, 26) + 97)
        else
            ret .= ch
    }
    return ret
}

LC_Rot5(string) {
    s := ""
    for ch in StrSplit(string) {
        c := Ord(ch)
        s .= (c >= 48 && c <= 57) ? ((c < 53) ? c + 5 : c - 5) : c
    }
    return s
}

LC_Rot13(string) {
    s := ""
    for ch in StrSplit(string) {
        c := Ord(ch)
        if ((c >= 97 && c <= 109) || (c >= 65 && c <= 77))
            c += 13
        else if ((c >= 110 && c <= 122) || (c >= 78 && c <= 90))
            c -= 13
        s .= Chr(c)
    }
    return s
}

LC_Rot18(string) {
    return LC_Rot13(LC_Rot5(string))
}

LC_Rot47(string) {
    s := ""
    for ch in StrSplit(string) {
        c := Ord(ch)
        c += (c >= 33 && c <= 79 ? 47 : (c >= 80 && c <= 126 ? -47 : 0))
        s .= Chr(c)
    }
    return s
}

; ==============================================================================
; Base conversion
; ==============================================================================

LC_To_Dec(b, n) {
    d := 0, n := StrUpper(n)
    for i, ch in StrSplit(n) {
        d *= b, k := ch
        if (k < "0" || k > "9")
            k := Ord(k) - 55
        else
            k := Integer(k)
        d += k
    }
    return d
}

LC_From_Dec(b, n) {
    m := ""
    Loop {
        d := Mod(n, b), n //= b
        m := (d < 10 ? d : Chr(d + 55)) m
        if n < 1
            Break
    }
    return m
}

LC_Dec2Hex(x) {
    return LC_From_Dec(16, x)
}

LC_Hex2Dec(x) {
    return LC_To_Dec(16, x)
}

LC_Numvert(num, from, to) {
    return LC_From_Dec(to, LC_To_Dec(from, num))
}

; ==============================================================================
; Div2
; ==============================================================================

LC_Div2_encode(input, WithAutoTrim := true, numproc := 1) {
    if WithAutoTrim
        input := StrReplace(input, A_Space, "_")
    Loop numproc {
        final := "", inputlen := StrLen(input)
        divmax := Ceil((0.5 * inputlen) + 1)
        Loop inputlen {
            temp := SubStr(input, A_Index, 1)
            q := inputlen + 1 - A_Index
            temp2 := SubStr(input, q, 1)
            if (A_Index < divmax) {
                final .= temp
                if (A_Index != q)
                    final .= temp2
            } else
                Break
        }
        input := final
    }
    return final
}

LC_Div2_decode(input, WithAutoTrim := true, numproc := 1) {
    if WithAutoTrim
        input := StrReplace(input, A_Space, "_")
    Loop numproc {
        i := 1, final := "", inputlen := StrLen(input)
        loopc := Ceil(inputlen * (1/2))
        Loop loopc {
            if (i <= inputlen)
                final .= SubStr(input, i, 1)
            i += 2
        }
        i := inputlen
        Loop loopc {
            if (i <= inputlen) {
                if (Mod(SubStr(i, 0, 1) + 0, 2) = 1) {
                    if (i != 1)
                        final .= SubStr(input, i - 1, 1)
                } else {
                    final .= SubStr(input, i, 1)
                }
            }
            i -= 2
        }
        input := final
    }
    return final
}

; ==============================================================================
; URI / URL
; ==============================================================================

LC_UriEncode(Uri, RE := "[0-9A-Za-z]") {
    Var := Buffer(StrPut(Uri, "UTF-8") - 1), StrPut(Uri, Var, "UTF-8"), Res := ""
    Loop Var.Size {
        Code := NumGet(Var, A_Index - 1, "UChar")
        Res .= (Chr(Code) ~= RE) ? Chr(Code) : Format("%{:02X}", Code)
    }
    return Res
}

LC_UriDecode(Uri, Encoding := "UTF-8") {
    Pos := 1
    while Pos := RegExMatch(Uri, "i)(%[\da-f]{2})+", &Code, Pos) {
        Var := Buffer(StrLen(Code[0]) // 3, 0), CodeTxt := SubStr(Code[0], 2)
        Loop Var.Size
            NumPut("UChar", Integer("0x" SubStr(CodeTxt, (A_Index - 1) * 2 + 1, 2)), Var, A_Index - 1)
        Decoded := StrGet(Var, Var.Size, Encoding)
        Uri := SubStr(Uri, 1, Pos - 1) Decoded SubStr(Uri, Pos + StrLen(Code[0]))
        Pos += StrLen(Decoded) + 1
    }
    return Uri
}

LC_UrlEncode(Url) {
    return LC_UriEncode(Url, "[!#$&-;=?-Z_a-z~]")
}

LC_UrlDecode(url) {
    return LC_UriDecode(url)
}

; ==============================================================================
; Vigenere
; ==============================================================================

LC_VigenereCipher(string, key, enc := 1) {
    enc := ""
    DllCall("user32\CharUpperW", "ptr", StrPtr(string))
    string := RegExReplace(string, "[^A-Z]")
    for ch in StrSplit(string) {
        a := Ord(ch) - 65
        b := Ord(SubStr(key, 1 + Mod(A_Index - 1, StrLen(key)), 1)) - 65
        enc .= Chr(Mod(a + b, 26) + 65)
    }
    return enc
}

LC_VigenereDecipher(string, key) {
    dec := ""
    for ch in StrSplit(key)
        dec .= Chr(26 - (Ord(ch) - 65) + 65)
    return LC_VigenereCipher(string, dec)
}

; ==============================================================================
; CryptoAPI Hash Core (CalcAddrHash etc.)
; ==============================================================================

LC_CalcAddrHash(addr, length, algid, &hash := 0, &hashlength := 0) {
    static h := [0,1,2,3,4,5,6,7,8,9,"a","b","c","d","e","f"]
    hProv := hHash := o := ""
    if DllCall("advapi32\CryptAcquireContext", "ptr*", &hProv, "ptr", 0, "ptr", 0, "uint", 24, "uint", 0xF0000000) = 0 {
        if DllCall("advapi32\CryptCreateHash", "ptr", hProv, "uint", algid, "uint", 0, "uint", 0, "ptr*", &hHash) = 0 {
            if DllCall("advapi32\CryptHashData", "ptr", hHash, "ptr", addr, "uint", length, "uint", 0) = 0 {
                if DllCall("advapi32\CryptGetHashParam", "ptr", hHash, "uint", 2, "ptr", 0, "uint*", &hashlength, "uint", 0) = 0 {
                    hash := Buffer(hashlength, 0)
                    if DllCall("advapi32\CryptGetHashParam", "ptr", hHash, "uint", 2, "ptr", hash, "uint*", &hashlength, "uint", 0) = 0 {
                        Loop hashlength {
                            v := NumGet(hash, A_Index - 1, "UChar")
                            o .= h[(v >> 4) + 1] h[(v & 0xF) + 1]
                        }
                    }
                }
            }
            DllCall("advapi32\CryptDestroyHash", "ptr", hHash)
        }
        DllCall("advapi32\CryptReleaseContext", "ptr", hProv, "uint", 0)
    }
    return o
}

LC_CalcStringHash(string, algid, encoding := "UTF-8", &hash := 0, &hashlength := 0) {
    chrlength := (encoding = "CP1200" || encoding = "UTF-16") ? 2 : 1
    length := (StrPut(string, encoding) - 1) * chrlength
    data := Buffer(length, 0)
    StrPut(string, data, length // chrlength, encoding)
    return LC_CalcAddrHash(data, length, algid, &hash, &hashlength)
}

LC_CalcHexHash(hexstring, algid) {
    length := StrLen(hexstring) // 2
    data := Buffer(length, 0)
    Loop length
        NumPut("UChar", Integer("0x" SubStr(hexstring, 2 * A_Index - 1, 2)), data, A_Index - 1)
    return LC_CalcAddrHash(data, length, algid)
}

LC_CalcFileHash(filename, algid, chunkSize := 0, &hash := 0, &hashlength := 0) {
    fpos := ""
    f := FileOpen(filename, "r")
    if !f
        return ""
    f.Pos := 0
    if (!chunkSize && f.Length > 0x7FFFFFFF)
        return ""
    if (!chunkSize) {
        data := Buffer(f.Length, 0)
        f.RawRead(data, f.Length)
        return LC_CalcAddrHash(data, f.Length, algid, &hash, &hashlength)
    }
    hashlength := 0
    while (f.Pos < f.Length) {
        readlength := (f.Length - fpos > chunkSize) ? chunkSize : f.Length - f.Pos
        data := Buffer(hashlength + readlength, 0)
        DllCall("RtlMoveMemory", "ptr", data, "ptr", hash, "ptr", hashlength)
        f.RawRead(data, hashlength + readlength)
        h := LC_CalcAddrHash(data, hashlength + readlength, algid, &hash, &hashlength)
    }
    return h
}

; ==============================================================================
; MD2 / MD4 / MD5 / SHA / SHA256 / SHA384 / SHA512 wrappers
; ==============================================================================

LC_MD2(string, encoding := "UTF-8")      => LC_CalcStringHash(string, 0x8001, encoding)
LC_HexMD2(hexstring)                     => LC_CalcHexHash(hexstring, 0x8001)
LC_FileMD2(filename)                     => LC_CalcFileHash(filename, 0x8001, 64*1024)
LC_AddrMD2(addr, length)                 => LC_CalcAddrHash(addr, length, 0x8001)

LC_MD4(string, encoding := "UTF-8")      => LC_CalcStringHash(string, 0x8002, encoding)
LC_HexMD4(hexstring)                     => LC_CalcHexHash(hexstring, 0x8002)
LC_FileMD4(filename)                     => LC_CalcFileHash(filename, 0x8002, 64*1024)
LC_AddrMD4(addr, length)                 => LC_CalcAddrHash(addr, length, 0x8002)

LC_MD5(string, encoding := "UTF-8")      => LC_CalcStringHash(string, 0x8003, encoding)
LC_HexMD5(hexstring)                     => LC_CalcHexHash(hexstring, 0x8003)
LC_FileMD5(filename)                     => LC_CalcFileHash(filename, 0x8003, 64*1024)
LC_AddrMD5(addr, length)                 => LC_CalcAddrHash(addr, length, 0x8003)

LC_SHA(string, encoding := "UTF-8")      => LC_CalcStringHash(string, 0x8004, encoding)
LC_HexSHA(hexstring)                     => LC_CalcHexHash(hexstring, 0x8004)
LC_FileSHA(filename)                     => LC_CalcFileHash(filename, 0x8004, 64*1024)
LC_AddrSHA(addr, length)                 => LC_CalcAddrHash(addr, length, 0x8004)

LC_SHA256(string, encoding := "UTF-8")   => LC_CalcStringHash(string, 0x800C, encoding)
LC_HexSHA256(hexstring)                  => LC_CalcHexHash(hexstring, 0x800C)
LC_FileSHA256(filename)                  => LC_CalcFileHash(filename, 0x800C, 64*1024)
LC_AddrSHA256(addr, length)              => LC_CalcAddrHash(addr, length, 0x800C)

LC_SHA384(string, encoding := "UTF-8")   => LC_CalcStringHash(string, 0x800D, encoding)
LC_HexSHA384(hexstring)                  => LC_CalcHexHash(hexstring, 0x800D)
LC_FileSHA384(filename)                  => LC_CalcFileHash(filename, 0x800D, 64*1024)
LC_AddrSHA384(addr, length)              => LC_CalcAddrHash(addr, length, 0x800D)

LC_SHA512(string, encoding := "UTF-8")   => LC_CalcStringHash(string, 0x800E, encoding)
LC_HexSHA512(hexstring)                  => LC_CalcHexHash(hexstring, 0x800E)
LC_FileSHA512(filename)                  => LC_CalcFileHash(filename, 0x800E, 64*1024)
LC_AddrSHA512(addr, length)              => LC_CalcAddrHash(addr, length, 0x800E)

; ==============================================================================
; CRC32
; ==============================================================================

LC_CRC32(string, encoding := "UTF-8") {
    chrlength := (encoding = "CP1200" || encoding = "UTF-16") ? 2 : 1
    length := (StrPut(string, encoding) - 1) * chrlength
    data := Buffer(length, 0)
    StrPut(string, data, length // chrlength, encoding)
    hMod := DllCall("Kernel32\LoadLibraryW", "str", "Ntdll.dll")
    CRC32 := DllCall("Ntdll\RtlComputeCrc32", "uint", 0, "ptr", data, "uint", length, "uint")
    CRC := Format("{:08X}", CRC32)
    DllCall("User32\CharLowerW", "str", CRC)
    DllCall("Kernel32\FreeLibrary", "ptr", hMod)
    return CRC
}

LC_HexCRC32(hexstring) {
    length := StrLen(hexstring) // 2
    data := Buffer(length, 0)
    Loop length
        NumPut("UChar", Integer("0x" SubStr(hexstring, 2 * A_Index - 1, 2)), data, A_Index - 1)
    hMod := DllCall("Kernel32\LoadLibraryW", "str", "Ntdll.dll")
    CRC32 := DllCall("Ntdll\RtlComputeCrc32", "uint", 0, "ptr", data, "uint", length, "uint")
    CRC := Format("{:08X}", CRC32)
    DllCall("User32\CharLowerW", "str", CRC)
    DllCall("Kernel32\FreeLibrary", "ptr", hMod)
    return CRC
}

LC_FileCRC32(sFile := "", cSz := 4) {
    Bytes := ""
    cSz := (cSz < 0 || cSz > 8) ? 2**22 : 2**(18 + cSz)
    BufferObj := Buffer(cSz, 0)
    hFil := DllCall("Kernel32\CreateFileW", "str", sFile, "uint", 0x80000000, "uint", 3, "int", 0, "uint", 3, "uint", 0, "int", 0, "ptr")
    if (hFil < 1)
        return hFil
    hMod := DllCall("Kernel32\LoadLibraryW", "str", "Ntdll.dll")
    CRC32 := 0
    fSz := NumGet(BufferObj, 0, "int64")
    Loop (fSz // cSz + !!Mod(fSz, cSz)) {
        DllCall("Kernel32\ReadFile", "ptr", hFil, "ptr", BufferObj, "uint", cSz, "uint*", &Bytes, "uint", 0)
        CRC32 := DllCall("Ntdll\RtlComputeCrc32", "uint", CRC32, "ptr", BufferObj, "uint", Bytes, "uint")
    }
    DllCall("Kernel32\CloseHandle", "ptr", hFil)
    CRC32 := Format("{:08X}", CRC32)
    DllCall("User32\CharLowerW", "str", CRC32)
    DllCall("Kernel32\FreeLibrary", "ptr", hMod)
    return CRC32
}

; ==============================================================================
; HMAC
; ==============================================================================

LC_HMAC(Key, Message, Algo := "MD5") {
    static Algorithms := {MD2:{ID:0x8001,Size:64}, MD4:{ID:0x8002,Size:64}, MD5:{ID:0x8003,Size:64}, SHA:{ID:0x8004,Size:64}, SHA256:{ID:0x800C,Size:64}, SHA384:{ID:0x800D,Size:128}, SHA512:{ID:0x800E,Size:128}}
    static iconst := 0x36, oconst := 0x5C
    if !Algorithms.Has(Algo)
        return ""
    AlgID := Algorithms[Algo].ID, BlockSize := Algorithms[Algo].Size
    MsgLen := StrPut(Message, "UTF-8") - 1
    KeyLen := StrPut(Key, "UTF-8") - 1
    K := Buffer(KeyLen + 1, 0)
    StrPut(Key, K, KeyLen, "UTF-8")
    KeyHash := KeyHashLen := ""
    if (KeyLen > BlockSize)
        LC_CalcAddrHash(K, KeyLen, AlgID, &KeyHash, &KeyHashLen)
    ipad := Buffer(BlockSize + MsgLen, iconst)
    Addr := KeyLen > BlockSize ? KeyHash : K
    Length := KeyLen > BlockSize ? KeyHashLen : KeyLen
    i := 0
    while (i < Length) {
        NumPut(NumGet(Addr, i, "UChar") ^ iconst, ipad, i, "UChar")
        i++
    }
    if (MsgLen)
        StrPut(Message, Buffer(ipad.Ptr + BlockSize, MsgLen), MsgLen, "UTF-8")
    InnerHash := InnerHashLen := ""
    LC_CalcAddrHash(ipad, BlockSize + MsgLen, AlgID, &InnerHash, &InnerHashLen)
    opad := Buffer(BlockSize + InnerHashLen, oconst)
    Addr := KeyLen > BlockSize ? KeyHash : K
    Length := KeyLen > BlockSize ? KeyHashLen : KeyLen
    i := 0
    while (i < Length) {
        NumPut(NumGet(Addr, i, "UChar") ^ oconst, opad, i, "UChar")
        i++
    }
    i := 0
    while (i < InnerHashLen) {
        NumPut(NumGet(InnerHash, i, "UChar"), Buffer(opad.Ptr + BlockSize + i, 1), 0, "UChar")
        i++
    }
    return LC_CalcAddrHash(opad, BlockSize + InnerHashLen, AlgID)
}

; ==============================================================================
; L64 / L128 Hash (Laszlo)
; ==============================================================================

__LC_LHashTable := []

LC_L64Hash(x) {
    global __LC_LHashTable
    if __LC_LHashTable.Length = 0
        __LC_LHash_LHashInit()
    R := 0
    for ch in StrSplit(x) {
        i := (R >> 56) & 255
        R := ((R << 8) + Ord(ch)) ^ __LC_LHashTable[i + 1]
    }
    return __LC_LHash_Hex8(R >> 32) . __LC_LHash_Hex8(R)
}

LC_L128Hash(x) {
    global __LC_LHashTable
    if __LC_LHashTable.Length = 0
        __LC_LHash_LHashInit()
    S := 0, R := -1
    for ch in StrSplit(x) {
        i := (R >> 56) & 255
        R := ((R << 8) + Ord(ch)) ^ __LC_LHashTable[i + 1]
        i := (S >> 56) & 255
        S := ((S << 8) + Ord(ch)) - __LC_LHashTable[i + 1]
    }
    return __LC_LHash_Hex8(R >> 32) . __LC_LHash_Hex8(R) . __LC_LHash_Hex8(S >> 32) . __LC_LHash_Hex8(S)
}

__LC_LHash_Hex8(i) {
    i := 0x100000000 | (i & 0xFFFFFFFF)
    return SubStr(i, -7)
}

__LC_LHash_LHashInit() {
    global __LC_LHashTable
    u := 0, v := 0
    Loop 256 {
        i := A_Index - 1
        __LC_LHASH_TEA(&u, &v, 1, 22, 333, 4444, 8)
        __LC_LHashTable.Push((u << 32) | v)
    }
}

__LC_LHASH_TEA(&y, &z, k0, k1, k2, k3, n := 32) {
    s := 0, d := 0x9E3779B9
    Loop n {
        k := [k0,k1,k2,k3][Mod(s, 4) + 1]
        y := 0xFFFFFFFF & (y + (((z << 4) ^ (z >> 5)) + z ^ s + k))
        s := 0xFFFFFFFF & (s + d)
        k := [k0,k1,k2,k3][Mod(s >> 11, 4) + 1]
        z := 0xFFFFFFFF & (z + (((y << 4) ^ (y >> 5)) + y ^ s + k))
    }
}

; ==============================================================================
; nnnik21 encryption
; ==============================================================================

LC_nnnik21_encryptStr(str := "", pass := "") {
    if !(enclen := (StrPut(str, "UTF-16") * 2))
        return "Error: Nothing to Encrypt"
    if !(passlen := StrPut(pass, "UTF-8") - 1)
        return "Error: No Pass"
    enclen := Mod(enclen, 4) ? enclen : enclen - 2
    encbin := Buffer(enclen, 0)
    StrPut(str, encbin, enclen // 2, "UTF-16")
    passlen += Mod((4 - Mod(passlen, 4)), 4)
    passbin := Buffer(passlen, 0)
    StrPut(pass, passbin, StrLen(pass), "UTF-8")
    LC_nnnik21_encryptbin(&encbin, encbin.Size, &passbin, passbin.Size)
    Text := ""
    LC_Base64_Encode(&Text, &encbin, encbin.Size)
    return Text
}

LC_nnnik21_decryptStr(str := "", pass := "") {
    if !(StrPut(str, "UTF-16") * 2)
        return "Error: Nothing to Decrypt"
    if !(passlen := StrPut(pass, "UTF-8") - 1)
        return "Error: No Pass"
    passlen += Mod((4 - Mod(passlen, 4)), 4)
    passbin := Buffer(passlen, 0)
    StrPut(pass, passbin, StrLen(pass), "UTF-8")
    encbin := Buffer(0)
    enclen := LC_Base64_Decode(&encbin, str)
    LC_nnnik21__decryptbin(&encbin, encbin.Size, &passbin, passbin.Size)
    return StrGet(encbin, encbin.Size, "UTF-16")
}

LC_nnnik21_encryptbin(&pBin1, sBin1, &pBin2, sBin2) {
    b := 0
    Loop sBin1 // 4 {
        a := NumGet(pBin1, sBin1 - A_Index * 4, "UInt")
        NumPut(a + b, pBin1, sBin1 - A_Index * 4, "UInt")
        b := (a + b) * a
    }
    Loop sBin2 // 4 {
        c := NumGet(pBin2, (A_Index - 1) * 4, "UInt")
        b := 0
        Loop sBin1 // 4 {
            a := NumGet(pBin1, (A_Index - 1) * 4, "UInt")
            NumPut((a + b) ^ c, pBin1, (A_Index - 1) * 4, "UInt")
            b := (a + b) * a
        }
    }
}

LC_nnnik21__decryptbin(&pBin1, sBin1, &pBin2, sBin2) {
    Loop sBin2 // 4 {
        c := NumGet(pBin2, sBin2 - A_Index * 4, "UInt")
        b := 0
        Loop sBin1 // 4 {
            a := NumGet(pBin1, (A_Index - 1) * 4, "UInt")
            a := (a ^ c) - b
            NumPut(a, pBin1, (A_Index - 1) * 4, "UInt")
            b := (a + b) * a
        }
    }
    b := 0
    Loop sBin1 // 4 {
        a := NumGet(pBin1, sBin1 - A_Index * 4, "UInt")
        a := a - b
        NumPut(a, pBin1, sBin1 - A_Index * 4, "UInt")
        b := (a + b) * a
    }
}

; ==============================================================================
; RC4
; ==============================================================================

LC_RC4_Encrypt(Data, Pass) {
    b := 0, j := 0, Key := [], sBox := [], Result := ""
    Loop 256 {
        a := A_Index - 1
        Key[a] := Ord(SubStr(Pass, Mod(a, StrLen(Pass)) + 1, 1))
        sBox[a] := a
    }
    Loop 256 {
        a := A_Index - 1
        b := (b + sBox[a] + Key[a]) & 255
        t := sBox[a], sBox[a] := sBox[b], sBox[b] := t
    }
    for ch in StrSplit(Data) {
        i := A_Index & 255
        j := (sBox[i] + j) & 255
        k := sBox[(sBox[i] + sBox[j]) & 255]
        t := sBox[i], sBox[i] := sBox[j], sBox[j] := t
        Result .= Format("{:02x}", Ord(ch) ^ sBox[k])
    }
    return Result
}

LC_RC4_Decrypt(Data, Pass) {
    b := 0, j := 0, Key := [], sBox := [], Result := ""
    Loop 256 {
        a := A_Index - 1
        Key[a] := Ord(SubStr(Pass, Mod(a, StrLen(Pass)) + 1, 1))
        sBox[a] := a
    }
    Loop 256 {
        a := A_Index - 1
        b := (b + sBox[a] + Key[a]) & 255
        t := sBox[a], sBox[a] := sBox[b], sBox[b] := t
    }
    Loop StrLen(Data) // 2 {
        i := A_Index & 255
        j := (sBox[i] + j) & 255
        k := sBox[(sBox[i] + sBox[j]) & 255]
        t := sBox[i], sBox[i] := sBox[j], sBox[j] := t
        Result .= Chr((Integer("0x" SubStr(Data, (2 * A_Index) - 1, 2))) ^ sBox[k])
    }
    return Result
}

LC_RC4(RC4Data, RC4Pass) {
    RC4PassLen := StrLen(RC4Pass), Key := [], sBox := [], b := 0, RC4Result := "", i := 0, j := 0
    Loop 256 {
        a := A_Index - 1
        ModVal := Mod(a, RC4PassLen) + 1
        c := SubStr(RC4Pass, ModVal, 1)
        Key[a] := Ord(c), sBox[a] := a
    }
    Loop 256 {
        a := A_Index - 1
        b := Mod(b + sBox[a] + Key[a], 256)
        T := sBox[a], sBox[a] := sBox[b], sBox[b] := T
    }
    for ch in StrSplit(RC4Data) {
        i := Mod(i + 1, 256)
        j := Mod(sBox[i] + j, 256)
        k := sBox[Mod(sBox[i] + sBox[j], 256)]
        c := Ord(ch) ^ k
        c := (c = 0) ? k : c
        RC4Result .= Chr(c)
    }
    return RC4Result
}

; ==============================================================================
; RSHash / SecureSalted
; ==============================================================================

LC_RSHash(str) {
    a := 0xF8C9, b := 0x5C6B7, h := 0
    for ch in StrSplit(str) {
        h := h * a + Ord(ch)
        a *= b
    }
    return h & 0x7FFFFFFF
}

LC_SecureSalted(salt, message, algo := "md5") {
    hash := ""
    funcName := "LC_" algo
    saltedHash := %funcName%(message . salt)
    saltedHashR := %funcName%(salt . message)
    len := StrLen(saltedHash)
    Loop len // 2 {
        byte1 := "0x" SubStr(saltedHash, 2 * A_Index - 1, 2)
        byte2 := "0x" SubStr(saltedHashR, 2 * A_Index - 1, 2)
        ns := SubStr(byte1 ^ byte2, 3)
        hash .= (StrLen(ns) < 2 ? "0" ns : ns)
    }
    return hash
}

; ==============================================================================
; VxE 89 / 251
; ==============================================================================

LC_VxE_Encrypt89(key, &message) {
    return LC_VxE_Crypt(key, &message, 1, "vxe89 len " StrLen(message))
}

LC_VxE_Decrypt89(key, &message) {
    return LC_VxE_Crypt(key, &message, 0, "vxe89 len " StrLen(message))
}

LC_VxE_Encrypt251(key, &message, len) {
    return LC_VxE_Crypt(key, &message, 1, "len " len)
}

LC_VxE_Decrypt251(key, &message, len) {
    return LC_VxE_Crypt(key, &message, 0, "len " len)
}

LC_VxE_Crypt(key, &message, direction := 1, options := "") {
    length := ""
    if RegExMatch(options, "i)(?:len|l)\K(?:0x[\da-fA-F]+|\d+)", &m)
        length := Integer(m[0])
    if length = ""
        length := StrLen(message)
    UseVxE89 := InStr(options, "vxe89")
    direction := 2 * (direction = 1) - 1
    w := StrLen(key)
    map := ""
    if UseVxE89 {
        Loop 126
            if (A_Index >= 32 && A_Index != 34 && A_Index != 39 && A_Index != 44 && A_Index != 47 && A_Index != 92 && A_Index != 96)
                map .= Chr(A_Index)
    } else {
        Loop 255
            if (A_Index != 9 && A_Index != 10 && A_Index != 13 && A_Index != 127)
                map .= Chr(A_Index)
    }
    k := StrLen(map)
    Loop 9
        if StrLen(key) < 509
            key := SubStr(key Chr(48 + A_Index) key, 1, 509)
    Loop 509 {
        q := NumGet(StrPtr(key) + A_Index - 1, "UChar")
        pos := 1 + Mod(q * A_Index * 3, k)
        e := SubStr(map, pos, 1)
        i := SubStr(map, 1, pos - 1)
        c := SubStr(map, pos + 1)
        map := i c e
        w ^= q * A_Index * 1657
    }
    x := 0
    Loop length {
        c := NumGet(message, A_Index - 1, "UChar")
        if !c || !(i := InStr(map, Chr(c), 1))
            Continue
        i--
        x++
        e := Mod(223390000 + i + w * direction, k)
        c := Ord(SubStr(map, e + 1, 1))
        NumPut(c, message, A_Index - 1, "UChar")
        if (direction = 1)
            c := Mod(e + x, 251)
        else
            c := Mod(i + x, 251)
        w ^= c | c << 8 | c << 16 | c << 24
    }
    return length
}

; ==============================================================================
; XOR
; ==============================================================================

LC_XOR_Encrypt(str, key) {
    EncLen := StrPut(str, "UTF-16") * 2
    EncData := Buffer(EncLen, 0)
    StrPut(str, EncData, EncLen // 2, "UTF-16")
    PassLen := StrPut(key, "UTF-8") - 1
    PassData := Buffer(PassLen, 0)
    StrPut(key, PassData, StrLen(key), "UTF-8")
    OutData := Buffer(0)
    LC_XOR(&OutData, &EncData, EncLen, &PassData, PassLen)
    OutBase64 := ""
    LC_Base64_Encode(&OutBase64, &OutData, OutData.Size)
    return OutBase64
}

LC_XOR_Decrypt(OutBase64, key) {
    OutData := Buffer(0)
    EncLen := LC_Base64_Decode(&OutData, OutBase64)
    PassLen := StrPut(key, "UTF-8") - 1
    PassData := Buffer(PassLen, 0)
    StrPut(key, PassData, StrLen(key), "UTF-8")
    EncData := Buffer(0)
    LC_XOR(&EncData, &OutData, EncLen, &PassData, PassLen)
    return StrGet(EncData, EncData.Size, "UTF-16")
}

LC_XOR(&OutData, &EncData, EncLen, &PassData, PassLen) {
    OutData := Buffer(EncLen, 0)
    Loop EncLen
        NumPut(NumGet(EncData, A_Index - 1, "UChar") ^ NumGet(PassData, Mod(A_Index - 1, PassLen), "UChar"), OutData, A_Index - 1, "UChar")
}

; ==============================================================================
; soupRot class
; ==============================================================================

class LC_soupRot {
    enc(str, mult, junk := 0) {
        str := LC_Base64_EncodeText(str)
        rotBase := StrLen(str) * mult
        nStr := ""
        i := 0
        for a in StrSplit(str) {
            i++
            rot := Mod(rotBase * i, 94)
            nC := Ord(a) + rot
            while (nC > 126 || nC < 32) {
                if (nC > 126)
                    nC -= 94
                else if (nC < 32)
                    nC += 94
            }
            nStr .= Chr(nC)
            if (junk)
                nStr .= this._randStr(junk, junk, 1234)
        }
        return nStr
    }
    dec(str, mult, junk := 0) {
        i := 0, rotBase := StrLen(str) * mult // (junk + 1), nStr := "", skip := 0
        for a in StrSplit(str) {
            if (skip) {
                skip--
                continue
            }
            i++
            rot := Mod(rotBase * i, 94)
            nC := Ord(a) - rot
            while (nC > 126 || nC < 32) {
                if (nC > 126)
                    nC -= 94
                else if (nC < 32)
                    nC += 94
            }
            nStr .= Chr(nC)
            if (junk)
                skip := junk
        }
        return RTrim(LC_Base64_DecodeText(nStr), Chr(65533))
    }
    _randStr(lowerBound, upperBound, mode := 1) {
        if (!this._isDigit(lowerBound) || !this._isDigit(upperBound) || !this._isDigit(mode))
            return -1
        str := ""
        Loop this._rand(lowerBound, upperBound) {
            t := ""
            if (StrLen(mode) = 1)
                t := mode
            else {
                while (!this._ifContains(mode, t))
                    t := this._rand(1, 4)
            }
            if (t = 1)
                str .= Chr(this._rand(97, 122))
            else if (t = 2)
                str .= Chr(this._rand(65, 90))
            else if (t = 3)
                str .= this._rand(0, 9)
            else if (t = 4) {
                i := this._rand(1, 4)
                str .= i = 1 ? Chr(this._rand(33, 47)) : i = 2 ? Chr(this._rand(58, 64)) : i = 3 ? Chr(this._rand(91, 96)) : Chr(this._rand(123, 126))
            }
        }
        return str
    }
    _rand(lowerBound, upperBound) {
        return Random(lowerBound, upperBound)
    }
    _ifContains(haystack, needle) {
        return InStr(haystack, needle) != 0
    }
    _isDigit(innum) {
        return InStr("0123456789", innum) != 0
    }
}