Golang sha256.New224函數代碼示例

func (e *Engine) sha224() error {
	data, err := computeHash(sha256.New224(), e.stack.Pop())
	if err == nil {
		e.stack.Push(data)
	}
	return err
}

// Encrypts a symmetric key to this identity
func (this *PublicIdentity) Encrypt(key *SymmetricKey) (ek *EncryptedKey) {
	out, err := rsa.EncryptOAEP(sha256.New224(), rand.Reader, this.key, key.key, nil)
	if err != nil {
		panic(err)
	}
	return &EncryptedKey{impl: out}
}

func process_file(filename string, complete chan Sumlist) {
	sumlist := Sumlist{}
	sumlist.filename = filename

	// Open the file and bail if we fail
	infile, err := os.Open(filename)
	if err != nil {
		log.Printf("Unable to open %s: %s", filename, err)
		complete <- sumlist
		return
	}
	defer infile.Close()

	// Create the checksum objects
	if flag_crc32 {
		sumlist.sums = append(sumlist.sums, Checksum{"CRC32", crc32.New(crc32.IEEETable)})
	}
	if flag_crc64 {
		sumlist.sums = append(sumlist.sums, Checksum{"CRC64", crc64.New(crc64.MakeTable(crc64.ISO))})
	}
	if flag_sha224 {
		sumlist.sums = append(sumlist.sums, Checksum{"SHA224", sha256.New224()})
	}
	if flag_sha256 {
		sumlist.sums = append(sumlist.sums, Checksum{"SHA256", sha256.New()})
	}
	if flag_sha384 {
		sumlist.sums = append(sumlist.sums, Checksum{"SHA384", sha512.New384()})
	}
	if flag_sha512 {
		sumlist.sums = append(sumlist.sums, Checksum{"SHA512", sha512.New()})
	}

	// Create our file reader
	reader := bufio.NewReader(infile)

	// Start a buffer and loop to read the entire file
	buf := make([]byte, 4096)
	for {
		read_count, err := reader.Read(buf)
		// If we get an error that is not EOF, then we have a problem
		if err != nil && err != io.EOF {
			log.Printf("Unable to open %s: %s", filename, err)
			complete <- sumlist
			return
		}
		// If the returned size is zero, we're at the end of the file
		if read_count == 0 {
			break
		}

		// Add the buffer contents to the checksum calculation
		for _, sum := range sumlist.sums {
			sum.hashFunc.Write(buf[:read_count])
		}

	}

	complete <- sumlist
}

// Checksum returns the checksum of some data, using a specified algorithm.
// It only returns an error when an invalid algorithm is used. The valid ones
// are MD5, SHA1, SHA224, SHA256, SHA384, SHA512, SHA3224, SHA3256, SHA3384,
// and SHA3512.
func Checksum(algorithm string, data []byte) (checksum string, err error) {
	// default
	var hasher hash.Hash
	switch strings.ToUpper(algorithm) {
	case "MD5":
		hasher = md5.New()
	case "SHA1":
		hasher = sha1.New()
	case "SHA224":
		hasher = sha256.New224()
	case "SHA256":
		hasher = sha256.New()
	case "SHA384":
		hasher = sha512.New384()
	case "SHA512":
		hasher = sha512.New()
	case "SHA3224":
		hasher = sha3.New224()
	case "SHA3256":
		hasher = sha3.New256()
	case "SHA3384":
		hasher = sha3.New384()
	case "SHA3512":
		hasher = sha3.New512()
	default:
		msg := "Invalid algorithm parameter passed go Checksum: %s"
		return checksum, fmt.Errorf(msg, algorithm)
	}
	hasher.Write(data)
	str := hex.EncodeToString(hasher.Sum(nil))
	return str, nil
}

// Decrypts a symmetric key encrypted to this Identity
func (this *SecretIdentity) Decrypt(ek *EncryptedKey) (key *SymmetricKey) {
	out, err := rsa.DecryptOAEP(sha256.New224(), rand.Reader, this.key, ek.impl, nil)
	if err != nil {
		panic(err)
	}
	return &SymmetricKey{key: out}
}

func main() {
	for _, h := range []hash.Hash{md4.New(), md5.New(), sha1.New(),
		sha256.New224(), sha256.New(), sha512.New384(), sha512.New(),
		ripemd160.New()} {
		fmt.Printf("%x\n\n", h.Sum())
	}
}

// Sha224base64 performs a sha224 hash on a byte array and then perfroms a base64 encoding on the result.
func Sha224base64(item []byte) (string, []byte) {

	phash := sha256.New224()
	io.WriteString(phash, string(item))
	phashbytes := phash.Sum(nil)
	return base64.StdEncoding.EncodeToString(phashbytes), phashbytes
}

func hash(pass string, salt_secret string, salt string, interation int64) (string, error) {
	var pass_salt string = salt_secret + pass + salt + salt_secret + pass + salt + pass + pass + salt
	var i int

	hash_pass := salt_local_secret
	hash_start := sha512.New()
	hash_center := sha256.New()
	hash_output := sha256.New224()

	i = 0
	for i <= stretching_password {
		i = i + 1
		hash_start.Write([]byte(pass_salt + hash_pass))
		hash_pass = hex.EncodeToString(hash_start.Sum(nil))
	}

	i = 0
	for int64(i) <= interation {
		i = i + 1
		hash_pass = hash_pass + hash_pass
	}

	i = 0
	for i <= stretching_password {
		i = i + 1
		hash_center.Write([]byte(hash_pass + salt_secret))
		hash_pass = hex.EncodeToString(hash_center.Sum(nil))
	}
	hash_output.Write([]byte(hash_pass + salt_local_secret))
	hash_pass = hex.EncodeToString(hash_output.Sum(nil))

	return hash_pass, nil
}

/*
   read from os.File and return the whole file's checksum
*/
func calc_checksum(fp io.Reader, t string) string {
	var m hash.Hash
	switch t {
	case "md5":
		m = md5.New()
	case "sha1":
		m = sha1.New()
	case "sha512":
		m = sha512.New()
	case "sha256":
		m = sha256.New()
	case "sha224":
		m = sha256.New224()
	case "sha384":
		m = sha512.New384()
	default:
		output_e("unknown type: %s\n", t)
		return ""
	}

	/*  issue:
	    if fp is os.Stdin, there is no way to trigger EOF
	*/
	_, err := io.Copy(m, fp)

	if err != nil {
		output_e("%ssum: %s\n", t, err.Error())
		return ""
	}

	return fmt.Sprintf("%x", m.Sum(nil))
}

func Sha224Sum(rdr io.Reader) (hash []byte, err error) {
	s224 := sha256.New224()
	if _, err = io.Copy(s224, rdr); err != nil {
		return
	}
	hash = make([]byte, 0, sha256.Size224)
	hash = s224.Sum(hash)
	return
}

// Computes a cryptographic fingerprint of this identity
func (this *PublicIdentity) Fingerprint() (fingerprint *Digest) {
	hash := sha256.New224()
	data, err := x509.MarshalPKIXPublicKey(this.key)
	if err != nil {
		panic(err)
	}
	hash.Write(data)
	return &Digest{impl: hash.Sum(nil)}
}

func TestSize(t *testing.T) {
	c := sha256.New()
	if got := c.Size(); got != Size {
		t.Errorf("Size = %d; want %d", got, sha256.Size)
	}
	c = sha256.New224()
	if got := c.Size(); got != Size224 {
		t.Errorf("New224.Size = %d; want %d", got, sha256.Size224)
	}
}

func (b *backend) pathHashWrite(
	req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
	inputB64 := d.Get("input").(string)
	format := d.Get("format").(string)
	algorithm := d.Get("urlalgorithm").(string)
	if algorithm == "" {
		algorithm = d.Get("algorithm").(string)
	}

	input, err := base64.StdEncoding.DecodeString(inputB64)
	if err != nil {
		return logical.ErrorResponse(fmt.Sprintf("unable to decode input as base64: %s", err)), logical.ErrInvalidRequest
	}

	switch format {
	case "hex":
	case "base64":
	default:
		return logical.ErrorResponse(fmt.Sprintf("unsupported encoding format %s; must be \"hex\" or \"base64\"", format)), nil
	}

	var hf hash.Hash
	switch algorithm {
	case "sha2-224":
		hf = sha256.New224()
	case "sha2-256":
		hf = sha256.New()
	case "sha2-384":
		hf = sha512.New384()
	case "sha2-512":
		hf = sha512.New()
	default:
		return logical.ErrorResponse(fmt.Sprintf("unsupported algorithm %s", algorithm)), nil
	}
	hf.Write(input)
	retBytes := hf.Sum(nil)

	var retStr string
	switch format {
	case "hex":
		retStr = hex.EncodeToString(retBytes)
	case "base64":
		retStr = base64.StdEncoding.EncodeToString(retBytes)
	}

	// Generate the response
	resp := &logical.Response{
		Data: map[string]interface{}{
			"sum": retStr,
		},
	}
	return resp, nil
}

func GetHash(a string) (hash.Hash, error) {
	var h hash.Hash
	switch a {
	case "adler32":
		h = adler32.New()
	case "crc32", "crc32ieee":
		h = crc32.New(crc32.MakeTable(crc32.IEEE))
	case "crc32castagnoli":
		h = crc32.New(crc32.MakeTable(crc32.Castagnoli))
	case "crc32koopman":
		h = crc32.New(crc32.MakeTable(crc32.Koopman))
	case "crc64", "crc64iso":
		h = crc64.New(crc64.MakeTable(crc64.ISO))
	case "crc64ecma":
		h = crc64.New(crc64.MakeTable(crc64.ECMA))
	case "fnv", "fnv32":
		h = fnv.New32()
	case "fnv32a":
		h = fnv.New32a()
	case "fnv64":
		h = fnv.New64()
	case "fnv64a":
		h = fnv.New64a()
	case "hmac", "hmacsha256":
		h = hmac.New(sha256.New, []byte(key))
	case "hmacmd5":
		h = hmac.New(md5.New, []byte(key))
	case "hmacsha1":
		h = hmac.New(sha1.New, []byte(key))
	case "hmacsha512":
		h = hmac.New(sha512.New, []byte(key))
	case "md4":
		h = md4.New()
	case "md5":
		h = md5.New()
	case "ripemd160":
		h = ripemd160.New()
	case "sha1":
		h = sha1.New()
	case "sha224":
		h = sha256.New224()
	case "sha256":
		h = sha256.New()
	case "sha384":
		h = sha512.New384()
	case "sha512":
		h = sha512.New()
	default:
		return nil, errors.New("Invalid algorithm")
	}
	return h, nil
}

func getHashSHA2(bitsize int) (hash.Hash, error) {
	switch bitsize {
	case 224:
		return sha256.New224(), nil
	case 256:
		return sha256.New(), nil
	case 384:
		return sha512.New384(), nil
	case 512:
		return sha512.New(), nil
	case 521:
		return sha512.New(), nil
	default:
		return nil, fmt.Errorf("Invalid bitsize. It was [%d]. Expected [224, 256, 384, 512, 521]", bitsize)
	}
}