Package sha1

• import "crypto/sha1"
• Overview
• Index
• Examples

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

• Constants
• func New() hash.Hash
• func Sum(data []byte) [Size]byte

Package files

sha1.go sha1block.go sha1block_amd64.go

Constants

The blocksize of SHA-1 in bytes.

const BlockSize = 64

The size of a SHA-1 checksum in bytes.

const Size = 20

func NewSource

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

package main

import (
	"crypto/sha1"
	"fmt"
	"io"
)

func main() {
	h := sha1.New()
	io.WriteString(h, "His money is twice tainted:")
	io.WriteString(h, " 'taint yours and 'taint mine.")
	fmt.Printf("% x", h.Sum(nil))
}

Example (File)

package main

import (
	"crypto/sha1"
	"fmt"
	"io"
	"log"
	"os"
)

func main() {
	f, err := os.Open("file.txt")
	if err != nil {
		log.Fatal(err)
	}
	defer f.Close()

	h := sha1.New()
	if _, err := io.Copy(h, f); err != nil {
		log.Fatal(err)
	}

	fmt.Printf("% x", h.Sum(nil))
}

func SumSource 1.2

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

Sum returns the SHA-1 checksum of the data.

Example

package main

import (
	"crypto/sha1"
	"fmt"
)

func main() {
	data := []byte("This page intentionally left blank.")
	fmt.Printf("% x", sha1.Sum(data))
}