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Found 2 results

  1. W1cked

    RC5 Package - Go

    I had help from @Spirited to figure this stuff out and port it to Go. I know a lot of people in the emulator communities don't use Go, but I hope with more packages released it will lift the barrier for people to use it. It's pretty straight forward, use the NewRC5 method instead of a struct literal. Encrypt by calling Encrypt and supplying a dst byte slice the same size as the src slice. For Decrypting, do the same thing. This adheres to the Cipher.Block interface, so for your client/conn structs you can just use that interface type. package rc5 import ( "encoding/binary" "math/bits" ) const ( WordSize = 16 Rounds = 12 KeySize = WordSize / 4 SubSize = 2 * (Rounds + 1) ) type RC5 struct { Key []uint32 Sub []uint32 } func NewRC5() RC5 { c := RC5{} c.Key = make([]uint32, KeySize) c.Sub = make([]uint32, SubSize) //Conquer default key c.generateKeys([]byte{ 0x3C, 0xDC, 0xFE, 0xE8, 0xC4, 0x54, 0xD6, 0x7E, 0x16, 0xA6, 0xF8, 0x1A, 0xE8, 0xD0, 0x38, 0xBE, }) return c } func (r *RC5) generateKeys(buf []byte) { //Initialize key expansion //seedLength := len(buf) / WordSize * WordSize for i := 0; i < KeySize; i++ { r.Key[i] = binary.LittleEndian.Uint32(buf[i*4:]) } //Generate r.Sub r.Sub[0] = 0xB7E15163 for i := 1; i < SubSize; i++ { r.Sub[i] = r.Sub[i-1] - 0x61C88647 } //Generate key vector var a, b uint32 var i, j int for x := 0; x < 3*SubSize; x++ { r.Sub[i] = bits.RotateLeft32(r.Sub[i]+(a+b), 3) a = r.Sub[i] r.Key[j] = bits.RotateLeft32(r.Key[j]+(a+b), int(a+b)) b = r.Key[j] i = (i + 1) % SubSize j = (j + 1) % KeySize } } func (r *RC5) Encrypt(dst, src []byte) { length := len(src) / 8 if (len(src) % 8) > 0 { length = length + 1 } copy(dst, src) for word := 0; word < length; word++ { a := binary.LittleEndian.Uint32(dst[8*word:]) + r.Sub[0] b := binary.LittleEndian.Uint32(dst[(8*word + 4):]) + r.Sub[1] for round := 1; round <= Rounds; round++ { a = bits.RotateLeft32(a^b, int(b)) + r.Sub[2*round] b = bits.RotateLeft32(b^a, int(a)) + r.Sub[2*round+1] } binary.LittleEndian.PutUint32(dst[8*word:], a) binary.LittleEndian.PutUint32(dst[8*word+4:], b) } } func (r *RC5) Decrypt(dst, src []byte) { length := len(src) / 8 if (len(src) % 8) > 0 { length = length + 1 } copy(dst, src) for word := 0; word < length; word++ { a := binary.LittleEndian.Uint32(dst[8*word:]) b := binary.LittleEndian.Uint32(dst[(8*word)+4:]) for round := Rounds; round > 0; round-- { b = bits.RotateLeft32(b-r.Sub[2*round+1], -int(a)) ^ a a = bits.RotateLeft32(a-r.Sub[2*round], -int(b)) ^ b } binary.LittleEndian.PutUint32(dst[8*word:], a-r.Sub[0]) binary.LittleEndian.PutUint32(dst[8*word+4:], b-r.Sub[1]) } } func BlockSize() int { return 8 }
  2. Spirited

    Project: Lines Toolkit

    Introduction Lines is a cross-platform system administration and software automation toolkit, leveraging golang for networking and parallel tasks. Command-line tools under Lines each focus on a task that can be performed in parallel, yielding faster results and offering some unique functionality. It's a project I got started to help accelerate some tasks at work and test Conquer Online servers. To get started, download the release binaries or build from source using the instructions below. I'll be adding to it as I go. Check out my Trello for some of the ideas I have. Build Instructions To build from source, run the following commands. Building requires the Golang compiler for lines source code, and goutil tools for code generation of system calls (fetched in the commands below). go get -u -d -v warry.io/lines/... go install -v warry.io/lines/... Tools exec: runs programs and clocks the overall execution time fetch: sends an HTTP GET request post: sends an HTTP POST request with either a form or file body serve: serves a file system using a web server multiplexer Links Github: https://github.com/garethwarry/lines Trello: https://trello.com/b/MxoRqm0H/lines
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