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Package sha256

import "crypto/sha256"
Overview
Index
Examples

Overview ▾

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

Constants

The blocksize of SHA256 and SHA224 in bytes. 

const BlockSize = 64

The size of a SHA256 checksum in bytes. 

const Size = 32

The size of a SHA224 checksum in bytes. 

const Size224 = 28

func New 

func New() hash.Hash

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.

▾ Example

Code:

h := sha256.New()
h.Write([]byte("hello world\n"))
fmt.Printf("%x", h.Sum(nil))

Output:

a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447

▾ Example (File)

Code:

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))

func New224 

func New224() hash.Hash

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

func Sum224 1.2 

func Sum224(data []byte) [Size224]byte

Sum224 returns the SHA224 checksum of the data.

func Sum256 1.2 

func Sum256(data []byte) [Size]byte

Sum256 returns the SHA256 checksum of the data.

▾ Example

Code:

sum := sha256.Sum256([]byte("hello world\n"))
fmt.Printf("%x", sum)

Output:

a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447