package sha256

Import Path
	crypto/sha256 (on go.dev)

Dependency Relation
	imports 7 packages, and imported by 3 packages


Involved Source Files

	
		Package sha256 implements the SHA224 and SHA256 hash algorithms as defined
		in FIPS 180-4.

	    sha256block.go
	    sha256block_amd64.go
	    sha256block_decl.go
	    sha256block_amd64.s


Code Examples

	
		package main
		
		import (
			"crypto/sha256"
			"fmt"
		)
		
		func main() {
			h := sha256.New()
			h.Write([]byte("hello world\n"))
			fmt.Printf("%x", h.Sum(nil))
		}

	
		package main
		
		import (
			"crypto/sha256"
			"fmt"
			"io"
			"log"
			"os"
		)
		
		func main() {
			f, err := os.Open("file.txt")
			if err != nil {
				log.Fatal(err)
			}
			defer f.Close()
		
			h := sha256.New()
			if _, err := io.Copy(h, f); err != nil {
				log.Fatal(err)
			}
		
			fmt.Printf("%x", h.Sum(nil))
		}

	
		package main
		
		import (
			"crypto/sha256"
			"fmt"
		)
		
		func main() {
			sum := sha256.Sum256([]byte("hello world\n"))
			fmt.Printf("%x", sum)
		}




Package-Level Functions (total 4)


	
		New returns a new hash.Hash computing the SHA256 checksum. The Hash
		also implements [encoding.BinaryMarshaler] and
		[encoding.BinaryUnmarshaler] to marshal and unmarshal the internal
		state of the hash.


	
		New224 returns a new hash.Hash computing the SHA224 checksum.


	
		Sum224 returns the SHA224 checksum of the data.


	
		Sum256 returns the SHA256 checksum of the data.




Package-Level Constants (total 3)


	
		The blocksize of SHA256 and SHA224 in bytes.


	
		The size of a SHA256 checksum in bytes.


	
		The size of a SHA224 checksum in bytes.