package sha1

Import Path
	crypto/sha1 (on go.dev)

Dependency Relation
	imports 9 packages, and imported by 2 packages


Involved Source Files

	
		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.

	    sha1block.go
	    sha1block_amd64.go
	    sha1block_amd64.s


Code Examples

	
		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))
		}

	
		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))
		}

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




Package-Level Functions (total 2)


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


	
		Sum returns the SHA-1 checksum of the data.




Package-Level Constants (total 2)


	
		The blocksize of SHA-1 in bytes.


	
		The size of a SHA-1 checksum in bytes.