import "crypto/sha1"
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.
const BlockSize = 64
The blocksize of SHA-1 in bytes.
const Size = 20
The size of a SHA-1 checksum in bytes.
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.
Code:
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))
Output:
59 7f 6a 54 00 10 f9 4c 15 d7 18 06 a9 9a 2c 87 10 e7 47 bd
Code:
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 Sum(data []byte) [Size]byte
Sum returns the SHA-1 checksum of the data.
Code:
data := []byte("This page intentionally left blank.")
fmt.Printf("% x", sha1.Sum(data))
Output:
af 06 49 23 bb f2 30 15 96 aa c4 c2 73 ba 32 17 8e bc 4a 96