Documentation
¶
Overview ¶
Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4.
Index ¶
Examples ¶
Constants ¶
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const BlockSize = 64
The blocksize of SHA256 and SHA224 in bytes.
View Source
const Size = 32
The size of a SHA256 checksum in bytes.
View Source
const Size224 = 28
The size of a SHA224 checksum in bytes.
Variables ¶
This section is empty.
Functions ¶
func New ¶
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 ¶
package main
import (
"crypto/sha256"
"fmt"
)
func main() {
h := sha256.New()
h.Write([]byte("hello world\n"))
fmt.Printf("%x", h.Sum(nil))
}
Output: a948904f2f0f479b8f8197694b30184b0d2ed1c1cd2a1ec0fb85d299a192a447
Example (File) ¶
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))
}
Output:
Types ¶
type Digest ¶
type Digest struct {
// contains filtered or unexported fields
}
Digest represents the partial evaluation of a checksum.
func (*Digest) MarshalBinary ¶
func (*Digest) UnmarshalBinary ¶
Source Files
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