version: 1.10

package sha1

import "crypto/sha1"

Overview

Package sha1 implements the SHA-1 hash algorithm as defined in RFC 3174.

SHA-1 is cryptographically broken and should not be used for secure
applications.

Index

Examples

Package files

sha1.go sha1block.go sha1block_amd64.go

Constants

  1. const BlockSize = 64

The blocksize of SHA-1 in bytes.

  1. const Size = 20

The size of a SHA-1 checksum in bytes.

func New

  1. func New() hash.Hash

New returns a new hash.Hash computing the SHA1 checksum. The Hash also
implements encoding.BinaryMarshaler and encoding.BinaryUnmarshaler to marshal
and unmarshal the internal state of the hash.


Example:

  1. h := sha1.New()
  2. io.WriteString(h, "His money is twice tainted:")
  3. io.WriteString(h, " 'taint yours and 'taint mine.")
  4. fmt.Printf("% x", h.Sum(nil))
  5. // Output: 59 7f 6a 54 00 10 f9 4c 15 d7 18 06 a9 9a 2c 87 10 e7 47 bd


Example:

  1. f, err := os.Open("file.txt")
  2. if err != nil {
  3.     log.Fatal(err)
  4. }
  5. defer f.Close()
  7. h := sha1.New()
  8. if _, err := io.Copy(h, f); err != nil {
  9.     log.Fatal(err)
  10. }
  12. fmt.Printf("% x", h.Sum(nil))

func Sum

  1. func Sum(data []byte) [Size]byte

Sum returns the SHA-1 checksum of the data.


Example:

  1. data := []byte("This page intentionally left blank.")
  2. fmt.Printf("% x", sha1.Sum(data))
  3. // Output: af 06 49 23 bb f2 30 15 96 aa c4 c2 73 ba 32 17 8e bc 4a 96