Sum

本文整理汇总了Golang中hash.Sum函数的典型用法代码示例。如果您正苦于以下问题：Golang Sum函数的具体用法？Golang Sum怎么用？Golang Sum使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了Sum函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: calcAes30Params

// Calculates the key and iv for AES decryption given a password and salt.
func calcAes30Params(pass []uint16, salt []byte) (key, iv []byte) {
    p := make([]byte, 0, len(pass)*2+len(salt))
    for _, v := range pass {
        p = append(p, byte(v), byte(v>>8))
    }
    p = append(p, salt...)

    hash := sha1.New()
    iv = make([]byte, 16)
    s := make([]byte, 0, hash.Size())
    for i := 0; i < hashRounds; i++ {
        hash.Write(p)
        hash.Write([]byte{byte(i), byte(i >> 8), byte(i >> 16)})
        if i%(hashRounds/16) == 0 {
            s = hash.Sum(s[:0])
            iv[i/(hashRounds/16)] = s[4*4+3]
        }
    }
    key = hash.Sum(s[:0])
    key = key[:16]

    for k := key; len(k) >= 4; k = k[4:] {
        k[0], k[1], k[2], k[3] = k[3], k[2], k[1], k[0]
    }
    return key, iv
}

开发者ID:shazow，项目名称:mog，代码行数:27，代码来源:archive15.go

示例2: PBKDF2

// An implementation of PBKDF2 (Password-Based Key Derivation Function 2) as
// specified in PKCS #5 v2.0 from RSA Laboratorie and in `RFC 2898
// <http://www.ietf.org/rfc/rfc2898.txt>`.
func PBKDF2(hashfunc func([]byte) hash.Hash, password, salt []byte, iterations, keylen int) (key []byte) {

    var (
        digest          []byte
        i, j, k, length int
    )

    key = make([]byte, keylen)
    slice := key

    hash := hashfunc(password)
    hashlen := hash.Size()
    scratch := make([]byte, 4)

    for keylen > 0 {

        if hashlen > keylen {
            length = keylen
        } else {
            length = hashlen
        }

        i += 1

        scratch[0] = byte(i >> 24)
        scratch[1] = byte(i >> 16)
        scratch[2] = byte(i >> 8)
        scratch[3] = byte(i)

        hash.Write(salt)
        hash.Write(scratch)

        digest = hash.Sum()
        hash.Reset()

        for j = 0; j < length; j++ {
            slice[j] = digest[j]
        }

        for k = 1; k < iterations; k++ {
            hash.Write(digest)
            digest = hash.Sum()
            for j = 0; j < length; j++ {
                slice[j] ^= digest[j]
            }
            hash.Reset()
        }

        keylen -= length
        slice = slice[length:]

    }

    return

}

开发者ID:gitreview，项目名称:ampify，代码行数:59，代码来源:crypto.go

示例3: Encode

// Encode encodes the given byte slice and returns a token.
func (tok *T) Encode(data []byte) (token []byte, err error) {
    if data == nil {
        data = []byte{}
    }
    body := make([]byte, 4+len(data))
    now := uint32(time.Now().UTC().Unix())
    binary.BigEndian.PutUint32(body, now)
    copy(body[4:], data)
    body, err = pkcs7Pad(body, aes.BlockSize)
    if err != nil {
        return nil, err
    }
    iv := NewKey(aes.BlockSize)
    mode := cipher.NewCBCEncrypter(tok.aes, iv)
    mode.CryptBlocks(body, body)
    hash := tok.hmac()
    // size = len(iv + aesblocks + signature)
    token = make([]byte, len(iv)+len(body)+hash.Size())
    copy(token, iv)
    offset := len(iv)
    copy(token[offset:], body)
    offset += len(body)
    hash.Write(token[:offset])
    copy(token[offset:], hash.Sum(nil))
    b := make([]byte, base64.RawURLEncoding.EncodedLen(len(token)))
    base64.RawURLEncoding.Encode(b, token)
    return b, nil
}

开发者ID:go-web，项目名称:tokenizer，代码行数:29，代码来源:token.go

示例4: Hash

func Hash(fileName string, newHash func() hash.Hash) ([]byte, error) {
    hash := newHash()

    file, err := os.Open(fileName)
    if err != nil {
        return nil, common.TraceError(err)
    }
    defer file.Close()

    temp := make([]byte, 4096)

    for {
        nn, err := file.Read(temp)
        if err == io.EOF {
            break
        }
        if err != nil {
            return nil, common.TraceError(err)
        }

        hash.Write(temp[0:nn])
    }

    return hash.Sum(nil), nil
}

开发者ID:NatTuck，项目名称:defunct-fogsync，代码行数:25，代码来源:crypto.go

示例5: ObjectPut

// ObjectPut creates or updates the path in the container from
// contents.  contents should be an open io.Reader which will have all
// its contents read.
//
// This is a low level interface.
//
// If checkHash is True then it will calculate the MD5 Hash of the
// file as it is being uploaded and check it against that returned
// from the server.  If it is wrong then it will return
// ObjectCorrupted.
//
// If you know the MD5 hash of the object ahead of time then set the
// Hash parameter and it will be sent to the server (as an Etag
// header) and the server will check the MD5 itself after the upload,
// and this will return ObjectCorrupted if it is incorrect.
//
// If you don't want any error protection (not recommended) then set
// checkHash to false and Hash to "".
//
// If contentType is set it will be used, otherwise one will be
// guessed from objectName using mime.TypeByExtension
func (c *Connection) ObjectPut(container string, objectName string, contents io.Reader, checkHash bool, Hash string, contentType string, h Headers) (headers Headers, err error) {
    extraHeaders := objectPutHeaders(objectName, &checkHash, Hash, contentType, h)
    hash := md5.New()
    var body io.Reader = contents
    if checkHash {
        body = io.TeeReader(contents, hash)
    }
    _, headers, err = c.storage(RequestOpts{
        Container:  container,
        ObjectName: objectName,
        Operation:  "PUT",
        Headers:    extraHeaders,
        Body:       body,
        NoResponse: true,
        ErrorMap:   objectErrorMap,
    })
    if err != nil {
        return
    }
    if checkHash {
        receivedMd5 := strings.ToLower(headers["Etag"])
        calculatedMd5 := fmt.Sprintf("%x", hash.Sum(nil))
        if receivedMd5 != calculatedMd5 {
            err = ObjectCorrupted
            return
        }
    }
    return
}

开发者ID:joeshaw，项目名称:swift，代码行数:50，代码来源:swift.go