return nil, io.ErrUnexpectedEOF
	}

	if n < chunk {
		buf := make([]byte, n)
		_, err := io.ReadFull(r, buf)
		if err != nil {
			return nil, err
		}
		return buf, nil
	}

	var buf []byte
	buf1 := make([]byte, chunk)
	for n > 0 {
		next := n
		if next > chunk {
			next = chunk
		}
		_, err := io.ReadFull(r, buf1[:next])
		if err != nil {
			if len(buf) > 0 && err == io.EOF {
				err = io.ErrUnexpectedEOF

	"strings"
)

func readLinuxProcCPUInfo() error {
	f, err := os.Open("/proc/cpuinfo")
	if err != nil {
		return err
	}
	defer f.Close()

	var buf [1 << 10]byte // enough for first CPU
	n, err := io.ReadFull(f, buf[:])
	if err != nil && err != io.ErrUnexpectedEOF {
		return err
	}
	in := string(buf[:n])
	const features = "\nFeatures	: "
	i := strings.Index(in, features)
	if i == -1 {

			return FormatError("bad tRNS length")
		}
		n, err := io.ReadFull(d.r, d.tmp[:length])
		if err != nil {
			return err
		}
		d.crc.Write(d.tmp[:n])

		copy(d.transparent[:], d.tmp[:length])
		d.useTransparent = true

	case cbP1, cbP2, cbP4, cbP8:
		if length > 256 {
			return FormatError("bad tRNS length")
		}
		n, err := io.ReadFull(d.r, d.tmp[:length])
		if err != nil {
			return err
		}

	const (
		MaxMetadataSize = 1 << 20 // max. size of the metadata
		Version         = 1
	)

	var header [5]byte
	if _, err := io.ReadFull(ciphertext, header[:]); err != nil {
		return nil, err
	}
	if header[0] != Version {
		return nil, fmt.Errorf("config: unknown ciphertext version %d", header[0])
	}
	size := binary.LittleEndian.Uint32(header[1:])

	"bufio"
	"bytes"
	"io"
	"os"
	"strings"
)

func readLinuxProcCPUInfo(buf []byte) error {
	f, err := os.Open("/proc/cpuinfo")
	if err != nil {
		return err
	}
	defer f.Close()

	_, err = io.ReadFull(f, buf)
	if err != nil && err != io.ErrUnexpectedEOF {
		return err
	}

	return nil
}

func osCPUInfoName() string {
	modelName := ""
	cpuMHz := ""

	test := func(ks int, pt, ad []byte) error {
		key := make([]byte, ks)
		if _, err := io.ReadFull(rand.Reader, key); err != nil {
			return err
		}
		asm, generic, err := newAESGCM(key)
		if err != nil {
			return err
		}
		if _, err := io.ReadFull(rand.Reader, pt); err != nil {
			return err
		}
		if _, err := io.ReadFull(rand.Reader, ad); err != nil {
			return err
		}
		nonce := make([]byte, 12)

func ExampleReadFull() {
	r := strings.NewReader("some io.Reader stream to be read\n")

	buf := make([]byte, 4)
	if _, err := io.ReadFull(r, buf); err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%s\n", buf)

	// minimal read size bigger than io.Reader stream
	longBuf := make([]byte, 64)
	if _, err := io.ReadFull(r, longBuf); err != nil {
		fmt.Println("error:", err)
	}

	// Output:
	// some
	// error: unexpected EOF
}

		})
		defer t.Stop()
		entropy, err := os.Open(randomDevice)
		if err != nil {
			r.seedErr = err
			return
		}
		defer entropy.Close()
		_, r.seedErr = io.ReadFull(entropy, r.key[:])
	})
	if r.seedErr != nil {
		return 0, r.seedErr
	}

	r.mu.Lock()
	blockCipher, err := aes.NewCipher(r.key[:])
	if err != nil {
		r.mu.Unlock()
		return 0, err
	}
	var (

			f, err := os.Open(urandomDevice)
			if err != nil {
				r.mu.Unlock()
				return 0, err
			}
			r.f = hideAgainReader{f}
			r.used.Store(2)
		}
		r.mu.Unlock()
	}
	return io.ReadFull(r.f, b)
}

// hideAgainReader masks EAGAIN reads from /dev/urandom.
// See golang.org/issue/9205
type hideAgainReader struct {
	r io.Reader
}

func (hr hideAgainReader) Read(p []byte) (n int, err error) {

		}
	}
	if offset != b.currOffset {
		// Can never happen unless there are programmer bugs
		return 0, errUnexpected
	}
	b.h.Reset()
	_, err = io.ReadFull(b.rc, b.hashBytes)
	if err != nil {
		return 0, err
	}
	_, err = io.ReadFull(b.rc, buf)
	if err != nil {
		return 0, err
	}
	b.h.Write(buf)
	if !bytes.Equal(b.h.Sum(nil), b.hashBytes) {
		return 0, errFileCorrupt
	}