Use whatsapp forks (#750)

vendor/github.com/Rhymen/go-whatsapp/crypto/cbc/cbc.go

@@ -1,101 +0,0 @@
-/*
-CBC describes a block cipher mode. In cryptography, a block cipher mode of operation is an algorithm that uses a
-block cipher to provide an information service such as confidentiality or authenticity. A block cipher by itself
-is only suitable for the secure cryptographic transformation (encryption or decryption) of one fixed-length group of
-bits called a block. A mode of operation describes how to repeatedly apply a cipher's single-block operation to
-securely transform amounts of data larger than a block.
-
-This package simplifies the usage of AES-256-CBC.
-*/
-package cbc
-
-/*
-Some code is provided by the GitHub user locked (github.com/locked):
-https://gist.github.com/locked/b066aa1ddeb2b28e855e
-Thanks!
-*/
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/rand"
-	"fmt"
-	"io"
-)
-
-/*
-Decrypt is a function that decrypts a given cipher text with a provided key and initialization vector(iv).
-*/
-func Decrypt(key, iv, ciphertext []byte) ([]byte, error) {
-	block, err := aes.NewCipher(key)
-
-	if err != nil {
-		return nil, err
-	}
-
-	if len(ciphertext) < aes.BlockSize {
-		return nil, fmt.Errorf("ciphertext is shorter then block size: %d / %d", len(ciphertext), aes.BlockSize)
-	}
-
-	if iv == nil {
-		iv = ciphertext[:aes.BlockSize]
-		ciphertext = ciphertext[aes.BlockSize:]
-	}
-
-	cbc := cipher.NewCBCDecrypter(block, iv)
-	cbc.CryptBlocks(ciphertext, ciphertext)
-
-	return unpad(ciphertext)
-}
-
-/*
-Encrypt is a function that encrypts plaintext with a given key and an optional initialization vector(iv).
-*/
-func Encrypt(key, iv, plaintext []byte) ([]byte, error) {
-	plaintext = pad(plaintext, aes.BlockSize)
-
-	if len(plaintext)%aes.BlockSize != 0 {
-		return nil, fmt.Errorf("plaintext is not a multiple of the block size: %d / %d", len(plaintext), aes.BlockSize)
-	}
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		return nil, err
-	}
-
-	var ciphertext []byte
-	if iv == nil {
-		ciphertext = make([]byte, aes.BlockSize+len(plaintext))
-		iv := ciphertext[:aes.BlockSize]
-		if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-			return nil, err
-		}
-
-		cbc := cipher.NewCBCEncrypter(block, iv)
-		cbc.CryptBlocks(ciphertext[aes.BlockSize:], plaintext)
-	} else {
-		ciphertext = make([]byte, len(plaintext))
-
-		cbc := cipher.NewCBCEncrypter(block, iv)
-		cbc.CryptBlocks(ciphertext, plaintext)
-	}
-
-	return ciphertext, nil
-}
-
-func pad(ciphertext []byte, blockSize int) []byte {
-	padding := blockSize - len(ciphertext)%blockSize
-	padtext := bytes.Repeat([]byte{byte(padding)}, padding)
-	return append(ciphertext, padtext...)
-}
-
-func unpad(src []byte) ([]byte, error) {
-	length := len(src)
-	padLen := int(src[length-1])
-
-	if padLen > length {
-		return nil, fmt.Errorf("padding is greater then the length: %d / %d", padLen, length)
-	}
-
-	return src[:(length - padLen)], nil
-}

vendor/github.com/Rhymen/go-whatsapp/crypto/curve25519/curve.go

@@ -1,44 +0,0 @@
-/*
-In cryptography, Curve25519 is an elliptic curve offering 128 bits of security and designed for use with the elliptic
-curve Diffie–Hellman (ECDH) key agreement scheme. It is one of the fastest ECC curves and is not covered by any known
-patents. The reference implementation is public domain software. The original Curve25519 paper defined it
-as a Diffie–Hellman (DH) function.
-*/
-package curve25519
-
-import (
-	"crypto/rand"
-	"golang.org/x/crypto/curve25519"
-	"io"
-)
-
-/*
-GenerateKey generates a public private key pair using Curve25519.
-*/
-func GenerateKey() (privateKey *[32]byte, publicKey *[32]byte, err error) {
-	var pub, priv [32]byte
-
-	_, err = io.ReadFull(rand.Reader, priv[:])
-	if err != nil {
-		return nil, nil, err
-	}
-
-	priv[0] &= 248
-	priv[31] &= 127
-	priv[31] |= 64
-
-	curve25519.ScalarBaseMult(&pub, &priv)
-
-	return &priv, &pub, nil
-}
-
-/*
-GenerateSharedSecret generates the shared secret with a given public private key pair.
-*/
-func GenerateSharedSecret(priv, pub [32]byte) []byte {
-	var secret [32]byte
-
-	curve25519.ScalarMult(&secret, &priv, &pub)
-
-	return secret[:]
-}

vendor/github.com/Rhymen/go-whatsapp/crypto/hkdf/hkdf.go

@@ -1,52 +0,0 @@
-/*
-HKDF is a simple key derivation function (KDF) based on
-a hash-based message authentication code (HMAC). It was initially proposed by its authors as a building block in
-various protocols and applications, as well as to discourage the proliferation of multiple KDF mechanisms.
-The main approach HKDF follows is the "extract-then-expand" paradigm, where the KDF logically consists of two modules:
-the first stage takes the input keying material and "extracts" from it a fixed-length pseudorandom key, and then the
-second stage "expands" this key into several additional pseudorandom keys (the output of the KDF).
-*/
-package hkdf
-
-import (
-	"crypto/hmac"
-	"crypto/sha256"
-	"fmt"
-	"golang.org/x/crypto/hkdf"
-	"io"
-)
-
-/*
-Expand expands a given key with the HKDF algorithm.
-*/
-func Expand(key []byte, length int, info string) ([]byte, error) {
-	if info == "" {
-		keyBlock := hmac.New(sha256.New, key)
-		var out, last []byte
-
-		var blockIndex byte = 1
-		for i := 0; len(out) < length; i++ {
-			keyBlock.Reset()
-			//keyBlock.Write(append(append(last, []byte(info)...), blockIndex))
-			keyBlock.Write(last)
-			keyBlock.Write([]byte(info))
-			keyBlock.Write([]byte{blockIndex})
-			last = keyBlock.Sum(nil)
-			blockIndex += 1
-			out = append(out, last...)
-		}
-		return out[:length], nil
-	} else {
-		h := hkdf.New(sha256.New, key, nil, []byte(info))
-		out := make([]byte, length)
-		n, err := io.ReadAtLeast(h, out, length)
-		if err != nil {
-			return nil, err
-		}
-		if n != length {
-			return nil, fmt.Errorf("new key to short")
-		}
-
-		return out[:length], nil
-	}
-}