[Go] Try HMAC-SHA512 implementation

...func Hash(inputValues []byte) []byte {    formattedMessage := formatInput(inputValues)    computed := compute(formattedMessage)    return computed}...func compute(messages []byte) []byte {...    // get H[N]    var results []byte    for _, h := range H {        b := make([]byte, 8)        binary.BigEndian.PutUint64(b, h)        results = append(results, b...)    }    return results}

package mainimport (    "crypto/hmac"    "crypto/sha512"    "fmt"    "log")func main() {    inputData := []byte("hello")    hmacSHA512Results := HashHMACSHA512(inputData, inputData)    var hresult string    for _, r := range hmacSHA512Results {        hresult += fmt.Sprintf("%02X", r)    }    log.Println(hresult)    h := hmac.New(sha512.New, inputData)    h.Write(inputData)    results := h.Sum(nil)    var result string    for _, r := range results {        result += fmt.Sprintf("%02X", r)    }    log.Println(result)}

package mainconst byteLength int = 128/* compute H(K XOR opad, H(K XOR ipad, text)) */func HashHMACSHA512(inputData, keyData []byte) []byte {    formattedKey := formatKey(keyData)    ipad := xorIPAD(formattedKey)    // append the stream of input data to the result of (K XOR ipad)    // and hash the value    innerData := Hash(append(ipad, inputData...))    opad := xorOPAD(formattedKey)    // append the H result to the result of (K XOR opad)    // and hash the value    return Hash(append(opad, innerData...))}func formatKey(keyData []byte) []byte {    // If its length is longer than the byte-length,    // it will be hashed first    if len(keyData) >= byteLength {        return Hash(keyData)    }    // If its length is shorter than the byte-length,    // it is first filled with zeros to make it that length    results := make([]byte, byteLength)    copy(results, keyData)    for i := len(keyData); i < byteLength; i++ {        results[i] = 0x00    }    return results}/* K XOR ipad(ipad = the byte 0x36 repeated B times) */func xorIPAD(k []byte) []byte {    results := make([]byte, len(k))    for i, key := range k {        results[i] = key ^ 0x36    }    return results}/* K XOR opad(opad = the byte 0x5C repeated B times) */func xorOPAD(k []byte) []byte {    results := make([]byte, len(k))    for i, key := range k {        results[i] = key ^ 0x5C    }    return results}

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